add server to monorepo.

2026-02-16 12:50:38 +00:00 · 2023-02-03 11:57:50 +02:00
parent 28e309981b
commit 80b97b5fdc
1303 changed files with 137049 additions and 0 deletions
--- a/packages/server/src/lib/AccountTypes/index.ts
+++ b/packages/server/src/lib/AccountTypes/index.ts
@@ -0,0 +1,101 @@
+import { get } from 'lodash';
+import { ACCOUNT_TYPES } from '@/data/AccountTypes';
+
+export default class AccountTypesUtils {
+  /**
+   * Retrieve account types list.
+   */
+  static getList() {
+    return ACCOUNT_TYPES;
+  }
+
+  /**
+   * Retrieve accounts types by the given root type.
+   * @param {string} rootType -
+   * @return {string}
+   */
+  static getTypesByRootType(rootType: string) {
+    return ACCOUNT_TYPES.filter((type) => type.rootType === rootType);
+  }
+
+  /**
+   * Retrieve account type by the given account type key.
+   * @param {string} key 
+   * @param {string} accessor 
+   */
+  static getType(key: string, accessor?: string) {
+    const type = ACCOUNT_TYPES.find((type) => type.key === key);
+
+    if (accessor) {
+      return get(type, accessor);
+    }
+    return type;
+  }
+
+  /**
+   * Retrieve accounts types by the parent account type.
+   * @param {string} parentType 
+   */
+  static getTypesByParentType(parentType: string) {
+    return ACCOUNT_TYPES.filter((type) => type.parentType === parentType);
+  }
+
+  /**
+   * Retrieve accounts types by the given account normal.
+   * @param {string} normal 
+   */
+  static getTypesByNormal(normal: string) {
+    return ACCOUNT_TYPES.filter((type) => type.normal === normal);
+  }
+
+  /**
+   * Detarmines whether the root type equals the account type. 
+   * @param {string} key 
+   * @param {string} rootType 
+   */
+  static isRootTypeEqualsKey(key: string, rootType: string): boolean {
+    return ACCOUNT_TYPES.some((type) => {
+      const isType = type.key === key;
+      const isRootType = type.rootType === rootType;
+
+      return isType && isRootType;
+    });
+  }
+
+  /**
+   * Detarmines whether the parent account type equals the account type key.
+   * @param {string} key - Account type key.
+   * @param {string} parentType - Account parent type.
+   */
+  static isParentTypeEqualsKey(key: string, parentType: string): boolean {
+    return ACCOUNT_TYPES.some((type) => {
+      const isType = type.key === key;
+      const isParentType = type.parentType === parentType;
+
+      return isType && isParentType;
+    });
+  }
+
+  /**
+   * Detarmines whether account type has balance sheet.
+   * @param {string} key - Account type key.
+   * 
+   */
+  static isTypeBalanceSheet(key: string): boolean {
+    return ACCOUNT_TYPES.some((type) => {
+      const isType = type.key === key;
+      return isType && type.balanceSheet;
+    });
+  }
+
+  /**
+   * Detarmines whether account type has profit/loss sheet.
+   * @param {string} key - Account type key.
+   */
+  static isTypePLSheet(key: string): boolean {
+    return ACCOUNT_TYPES.some((type) => {
+      const isType = type.key === key;
+      return isType && type.incomeSheet;
+    });
+  }
+}
--- a/packages/server/src/lib/Cachable/CachableModel.js
+++ b/packages/server/src/lib/Cachable/CachableModel.js
@@ -0,0 +1,16 @@
+import BaseModel from 'models/Model';
+import CacheService from '@/services/Cache';
+
+export default (Model) => {
+  return class CachableModel extends Model{
+    static flushCache(key) {
+      const modelName = this.name;
+
+      if (key) {
+        CacheService.del(`${modelName}.${key}`);
+      } else {
+        CacheService.delStartWith(modelName);
+      }
+    }
+  };
+} 
--- a/packages/server/src/lib/Cachable/CachableQueryBuilder.js
+++ b/packages/server/src/lib/Cachable/CachableQueryBuilder.js
@@ -0,0 +1,69 @@
+import { QueryBuilder } from 'objection';
+import crypto from 'crypto';
+import CacheService from '@/services/Cache';
+
+export default class CachableQueryBuilder extends QueryBuilder{
+
+  async then(...args) {
+    // Flush model cache after insert, delete or update transaction.
+    if (this.isInsert() || this.isDelete() || this.isUpdate()) {
+      this.modelClass().flushCache();
+    }
+    if (this.cacheTag && this.isFind()) {
+      this.setCacheKey();
+      return this.getOrStoreCache().then(...args);
+    } else {
+      const promise = this.execute();
+    
+      return promise.then((result) => {
+        this.setCache(result);
+        return result;
+      }).then(...args);
+    }
+  }
+
+  getOrStoreCache() {
+    const storeFunction = () => this.execute();
+
+    return new Promise((resolve, reject) => {
+      CacheService.get(this.cacheKey, storeFunction)
+        .then((result) => { resolve(result); });
+    });
+  }
+
+  setCache(results) {
+    CacheService.set(`${this.cacheKey}`, results, this.cacheSeconds);
+  }
+
+  generateCacheKey() {
+    const knexSql = this.toKnexQuery().toSQL();
+    const hashedQuery = crypto.createHash('md5').update(knexSql.sql).digest("hex");
+
+    return hashedQuery;
+  }
+
+  remember(key, seconds) {
+    const modelName = this.modelClass().name;
+
+    this.cacheSeconds = seconds;
+    this.cacheTag = (key) ? `${modelName}.${key}` : modelName;
+
+    return this;
+  }
+
+  withGraphFetched(relation, settings) {
+    if (!this.graphAppends) {
+      this.graphAppends = [relation];
+    } else {
+      this.graphAppends.push(relation);
+    }
+    return super.withGraphFetched(relation, settings);
+  }
+
+  setCacheKey() {
+    const hashedQuery = this.generateCacheKey();
+    const appends = (this.graphAppends || []).join(this.graphAppends, ',');
+
+    this.cacheKey = `${this.cacheTag}.${hashedQuery}.${appends}`;
+  }
+}
--- a/packages/server/src/lib/DependencyGraph/index.js
+++ b/packages/server/src/lib/DependencyGraph/index.js
@@ -0,0 +1,350 @@
+/**
+ * A simple dependency graph
+ */
+
+/**
+ * Helper for creating a Topological Sort using Depth-First-Search on a set of edges.
+ *
+ * Detects cycles and throws an Error if one is detected (unless the "circular"
+ * parameter is "true" in which case it ignores them).
+ *
+ * @param edges The set of edges to DFS through
+ * @param leavesOnly Whether to only return "leaf" nodes (ones who have no edges)
+ * @param result An array in which the results will be populated
+ * @param circular A boolean to allow circular dependencies
+ */
+function createDFS(edges, leavesOnly, result, circular) {
+  var visited = {};
+  return function (start) {
+    if (visited[start]) {
+      return;
+    }
+    var inCurrentPath = {};
+    var currentPath = [];
+    var todo = []; // used as a stack
+    todo.push({ node: start, processed: false });
+    while (todo.length > 0) {
+      var current = todo[todo.length - 1]; // peek at the todo stack
+      var processed = current.processed;
+      var node = current.node;
+      if (!processed) {
+        // Haven't visited edges yet (visiting phase)
+        if (visited[node]) {
+          todo.pop();
+          continue;
+        } else if (inCurrentPath[node]) {
+          // It's not a DAG
+          if (circular) {
+            todo.pop();
+            // If we're tolerating cycles, don't revisit the node
+            continue;
+          }
+          currentPath.push(node);
+          throw new DepGraphCycleError(currentPath);
+        }
+
+        inCurrentPath[node] = true;
+        currentPath.push(node);
+        var nodeEdges = edges[node];
+        // (push edges onto the todo stack in reverse order to be order-compatible with the old DFS implementation)
+        for (var i = nodeEdges.length - 1; i >= 0; i--) {
+          todo.push({ node: nodeEdges[i], processed: false });
+        }
+        current.processed = true;
+      } else {
+        // Have visited edges (stack unrolling phase)
+        todo.pop();
+        currentPath.pop();
+        inCurrentPath[node] = false;
+        visited[node] = true;
+        if (!leavesOnly || edges[node].length === 0) {
+          result.push(node);
+        }
+      }
+    }
+  };
+}
+
+/**
+ * Simple Dependency Graph
+ */
+var DepGraph = (DepGraph = function DepGraph(opts) {
+  this.nodes = {}; // Node -> Node/Data (treated like a Set)
+  this.outgoingEdges = {}; // Node -> [Dependency Node]
+  this.incomingEdges = {}; // Node -> [Dependant Node]
+  this.circular = opts && !!opts.circular; // Allows circular deps
+});
+
+DepGraph.fromArray = (
+  items,
+  options = { itemId: 'id', parentItemId: 'parent_id' }
+) => {
+  const depGraph = new DepGraph();
+
+  items.forEach((item) => {
+    depGraph.addNode(item[options.itemId], item);
+  });
+  items.forEach((item) => {
+    if (item[options.parentItemId]) {
+      depGraph.addDependency(item[options.parentItemId], item[options.itemId]);
+    }
+  });
+  return depGraph;
+};
+
+DepGraph.prototype = {
+  /**
+   * The number of nodes in the graph.
+   */
+  size: function () {
+    return Object.keys(this.nodes).length;
+  },
+  /**
+   * Add a node to the dependency graph. If a node already exists, this method will do nothing.
+   */
+  addNode: function (node, data) {
+    if (!this.hasNode(node)) {
+      // Checking the arguments length allows the user to add a node with undefined data
+      if (arguments.length === 2) {
+        this.nodes[node] = data;
+      } else {
+        this.nodes[node] = node;
+      }
+      this.outgoingEdges[node] = [];
+      this.incomingEdges[node] = [];
+    }
+  },
+  /**
+   * Remove a node from the dependency graph. If a node does not exist, this method will do nothing.
+   */
+  removeNode: function (node) {
+    if (this.hasNode(node)) {
+      delete this.nodes[node];
+      delete this.outgoingEdges[node];
+      delete this.incomingEdges[node];
+      [this.incomingEdges, this.outgoingEdges].forEach(function (edgeList) {
+        Object.keys(edgeList).forEach(function (key) {
+          var idx = edgeList[key].indexOf(node);
+          if (idx >= 0) {
+            edgeList[key].splice(idx, 1);
+          }
+        }, this);
+      });
+    }
+  },
+  /**
+   * Check if a node exists in the graph
+   */
+  hasNode: function (node) {
+    return this.nodes.hasOwnProperty(node);
+  },
+  /**
+   * Get the data associated with a node name
+   */
+  getNodeData: function (node) {
+    if (this.hasNode(node)) {
+      return this.nodes[node];
+    } else {
+      throw new Error('Node does not exist: ' + node);
+    }
+  },
+
+  /**
+   * Set the associated data for a given node name. If the node does not exist, this method will throw an error
+   */
+  setNodeData: function (node, data) {
+    if (this.hasNode(node)) {
+      this.nodes[node] = data;
+    } else {
+      throw new Error('Node does not exist: ' + node);
+    }
+  },
+  /**
+   * Add a dependency between two nodes. If either of the nodes does not exist,
+   * an Error will be thrown.
+   */
+  addDependency: function (from, to) {
+    if (!this.hasNode(from)) {
+      throw new Error('Node does not exist: ' + from);
+    }
+    if (!this.hasNode(to)) {
+      throw new Error('Node does not exist: ' + to);
+    }
+    if (this.outgoingEdges[from].indexOf(to) === -1) {
+      this.outgoingEdges[from].push(to);
+    }
+    if (this.incomingEdges[to].indexOf(from) === -1) {
+      this.incomingEdges[to].push(from);
+    }
+    return true;
+  },
+  /**
+   * Remove a dependency between two nodes.
+   */
+  removeDependency: function (from, to) {
+    var idx;
+    if (this.hasNode(from)) {
+      idx = this.outgoingEdges[from].indexOf(to);
+      if (idx >= 0) {
+        this.outgoingEdges[from].splice(idx, 1);
+      }
+    }
+
+    if (this.hasNode(to)) {
+      idx = this.incomingEdges[to].indexOf(from);
+      if (idx >= 0) {
+        this.incomingEdges[to].splice(idx, 1);
+      }
+    }
+  },
+  /**
+   * Return a clone of the dependency graph. If any custom data is attached
+   * to the nodes, it will only be shallow copied.
+   */
+  clone: function () {
+    var source = this;
+    var result = new DepGraph();
+    var keys = Object.keys(source.nodes);
+    keys.forEach(function (n) {
+      result.nodes[n] = source.nodes[n];
+      result.outgoingEdges[n] = source.outgoingEdges[n].slice(0);
+      result.incomingEdges[n] = source.incomingEdges[n].slice(0);
+    });
+    return result;
+  },
+  /**
+   * Get an array containing the nodes that the specified node depends on (transitively).
+   *
+   * Throws an Error if the graph has a cycle, or the specified node does not exist.
+   *
+   * If `leavesOnly` is true, only nodes that do not depend on any other nodes will be returned
+   * in the array.
+   */
+  dependenciesOf: function (node, leavesOnly) {
+    if (this.hasNode(node)) {
+      var result = [];
+      var DFS = createDFS(
+        this.outgoingEdges,
+        leavesOnly,
+        result,
+        this.circular
+      );
+      DFS(node);
+      var idx = result.indexOf(node);
+      if (idx >= 0) {
+        result.splice(idx, 1);
+      }
+      return result;
+    } else {
+      throw new Error('Node does not exist: ' + node);
+    }
+  },
+  /**
+   * get an array containing the nodes that depend on the specified node (transitively).
+   *
+   * Throws an Error if the graph has a cycle, or the specified node does not exist.
+   *
+   * If `leavesOnly` is true, only nodes that do not have any dependants will be returned in the array.
+   */
+  dependantsOf: function (node, leavesOnly) {
+    if (this.hasNode(node)) {
+      var result = [];
+      var DFS = createDFS(
+        this.incomingEdges,
+        leavesOnly,
+        result,
+        this.circular
+      );
+      DFS(node);
+      var idx = result.indexOf(node);
+      if (idx >= 0) {
+        result.splice(idx, 1);
+      }
+      return result;
+    } else {
+      throw new Error('Node does not exist: ' + node);
+    }
+  },
+  /**
+   * Construct the overall processing order for the dependency graph.
+   *
+   * Throws an Error if the graph has a cycle.
+   *
+   * If `leavesOnly` is true, only nodes that do not depend on any other nodes will be returned.
+   */
+  overallOrder: function (leavesOnly) {
+    var self = this;
+    var result = [];
+    var keys = Object.keys(this.nodes);
+    if (keys.length === 0) {
+      return result; // Empty graph
+    } else {
+      if (!this.circular) {
+        // Look for cycles - we run the DFS starting at all the nodes in case there
+        // are several disconnected subgraphs inside this dependency graph.
+        var CycleDFS = createDFS(this.outgoingEdges, false, [], this.circular);
+        keys.forEach(function (n) {
+          CycleDFS(n);
+        });
+      }
+
+      var DFS = createDFS(
+        this.outgoingEdges,
+        leavesOnly,
+        result,
+        this.circular
+      );
+      // Find all potential starting points (nodes with nothing depending on them) an
+      // run a DFS starting at these points to get the order
+      keys
+        .filter(function (node) {
+          return self.incomingEdges[node].length === 0;
+        })
+        .forEach(function (n) {
+          DFS(n);
+        });
+
+      // If we're allowing cycles - we need to run the DFS against any remaining
+      // nodes that did not end up in the initial result (as they are part of a
+      // subgraph that does not have a clear starting point)
+      if (this.circular) {
+        keys
+          .filter(function (node) {
+            return result.indexOf(node) === -1;
+          })
+          .forEach(function (n) {
+            DFS(n);
+          });
+      }
+
+      return result;
+    }
+  },
+
+  mapNodes(mapper) {},
+};
+
+/**
+ * Cycle error, including the path of the cycle.
+ */
+var DepGraphCycleError = (exports.DepGraphCycleError = function (cyclePath) {
+  var message = 'Dependency Cycle Found: ' + cyclePath.join(' -> ');
+  var instance = new Error(message);
+  instance.cyclePath = cyclePath;
+  Object.setPrototypeOf(instance, Object.getPrototypeOf(this));
+  if (Error.captureStackTrace) {
+    Error.captureStackTrace(instance, DepGraphCycleError);
+  }
+  return instance;
+});
+DepGraphCycleError.prototype = Object.create(Error.prototype, {
+  constructor: {
+    value: Error,
+    enumerable: false,
+    writable: true,
+    configurable: true,
+  },
+});
+Object.setPrototypeOf(DepGraphCycleError, Error);
+
+export default DepGraph;
--- a/packages/server/src/lib/DynamicFilter/DynamicFilter.ts
+++ b/packages/server/src/lib/DynamicFilter/DynamicFilter.ts
@@ -0,0 +1,91 @@
+import { forEach, uniqBy } from 'lodash';
+import DynamicFilterAbstructor from './DynamicFilterAbstructor';
+import { IDynamicFilter, IFilterRole, IModel } from '@/interfaces';
+
+export default class DynamicFilter extends DynamicFilterAbstructor{
+  private model: IModel;
+  private tableName: string;
+  private dynamicFilters: IDynamicFilter[];
+
+  /**
+   * Constructor.
+   * @param {String} tableName -
+   */
+  constructor(model) {
+    super();
+
+    this.model = model;
+    this.tableName = model.tableName;
+    this.dynamicFilters = [];
+  }
+
+  /**
+   * Registers the given dynamic filter.
+   * @param {IDynamicFilter} filterRole - Filter role.
+   */
+  public setFilter = (dynamicFilter: IDynamicFilter) => {
+    dynamicFilter.setModel(this.model);
+
+    dynamicFilter.onInitialize();
+
+    this.dynamicFilters.push(dynamicFilter);
+  }
+
+  /**
+   * Retrieve dynamic filter build queries.
+   * @returns 
+   */
+  private dynamicFiltersBuildQuery = () => {
+    return this.dynamicFilters.map((filter) => {
+      return filter.buildQuery()
+    });
+  }
+
+  /**
+   * Retrieve dynamic filter roles.
+   * @returns {IFilterRole[]}
+   */
+  private dynamicFilterTableColumns = (): IFilterRole[] => {
+    const localFilterRoles = [];
+
+    this.dynamicFilters.forEach((dynamicFilter) => {
+      const { filterRoles } = dynamicFilter;
+
+      localFilterRoles.push(
+        ...(Array.isArray(filterRoles) ? filterRoles : [filterRoles])
+      );
+    });
+    return localFilterRoles;
+  }
+
+  /**
+   * Builds queries of filter roles.
+   */
+  public buildQuery = () => {
+    const buildersCallbacks = this.dynamicFiltersBuildQuery();
+    const tableColumns = this.dynamicFilterTableColumns();
+
+    return (builder) => {
+      buildersCallbacks.forEach((builderCallback) => {
+        builderCallback(builder);
+      });
+      this.buildFilterRolesJoins(builder);
+    };
+  }
+
+  /**
+   * Retrieve response metadata from all filters adapters.
+   */
+  public getResponseMeta = () => {
+    const responseMeta = {};
+
+    this.dynamicFilters.forEach((filter) => {
+      const { responseMeta: filterMeta } = filter;
+
+      forEach(filterMeta, (value, key) => {
+        responseMeta[key] = value;
+      });
+    });
+    return responseMeta;
+  }
+}
--- a/packages/server/src/lib/DynamicFilter/DynamicFilterAbstructor.ts
+++ b/packages/server/src/lib/DynamicFilter/DynamicFilterAbstructor.ts
@@ -0,0 +1,50 @@
+
+export default class DynamicFilterAbstructor {
+  /**
+   * Extract relation table name from relation.
+   * @param {String} column -
+   * @return {String} - join relation table.
+   */
+  protected getTableFromRelationColumn = (column: string) => {
+    const splitedColumn = column.split('.');
+    return splitedColumn.length > 0 ? splitedColumn[0] : '';
+  };
+
+  /**
+   * Builds view roles join queries.
+   * @param {String} tableName - Table name.
+   * @param {Array} roles - Roles.
+   */
+  protected buildFilterRolesJoins = (builder) => {
+    this.dynamicFilters.forEach((dynamicFilter) => {
+      const relationsFields = dynamicFilter.relationFields;
+
+      this.buildFieldsJoinQueries(builder, relationsFields);
+    });
+  };
+
+  /**
+   * Builds join queries of fields.
+   * @param builder - 
+   * @param {string[]} fieldsRelations -
+   */
+  private buildFieldsJoinQueries = (builder, fieldsRelations: string[]) => {
+    fieldsRelations.forEach((fieldRelation) => {
+      const relation = this.model.relationMappings[fieldRelation];
+
+      if (relation) {
+        const splitToRelation = relation.join.to.split('.');
+        const relationTable = splitToRelation[0] || '';
+
+        builder.join(relationTable, relation.join.from, '=', relation.join.to);
+      }
+    });
+  };
+
+  /**
+   * Retrieve the dynamic filter mode.
+   */
+  protected getModel() {
+    return this.model;
+  }
+}
--- a/packages/server/src/lib/DynamicFilter/DynamicFilterAdvancedFilter.ts
+++ b/packages/server/src/lib/DynamicFilter/DynamicFilterAdvancedFilter.ts
@@ -0,0 +1,27 @@
+import { IFilterRole } from '@/interfaces';
+import DynamicFilterFilterRoles from './DynamicFilterFilterRoles';
+
+export default class DynamicFilterAdvancedFilter extends DynamicFilterFilterRoles {
+  private filterRoles: IFilterRole[];
+
+  /**
+   * Constructor method.
+   * @param {Array} filterRoles -
+   * @param {Array} resourceFields -
+   */
+  constructor(filterRoles: IFilterRole[]) {
+    super();
+
+    this.filterRoles = filterRoles;
+    this.setResponseMeta();
+  }
+
+  /**
+   * Sets response meta.
+   */
+  private setResponseMeta() {
+    this.responseMeta = {
+      filterRoles: this.filterRoles,
+    };
+  }
+}
--- a/packages/server/src/lib/DynamicFilter/DynamicFilterFilterRoles.ts
+++ b/packages/server/src/lib/DynamicFilter/DynamicFilterFilterRoles.ts
@@ -0,0 +1,52 @@
+import DynamicFilterRoleAbstructor from './DynamicFilterRoleAbstructor';
+import { IFilterRole } from '@/interfaces';
+
+export default class FilterRoles extends DynamicFilterRoleAbstructor {
+  private filterRoles: IFilterRole[];
+
+  /**
+   * On initialize filter roles.
+   */
+  public onInitialize() {
+    super.onInitialize();
+    this.setFilterRolesRelations();
+  }
+
+  /**
+   * Builds filter roles logic expression.
+   * @return {string}
+   */
+  private buildLogicExpression(): string {
+    let expression = '';
+
+    this.filterRoles.forEach((role, index) => {
+      expression +=
+        index === 0 ? `${role.index} ` : `${role.condition} ${role.index} `;
+    });
+    return expression.trim();
+  }
+
+  /**
+   * Builds database query of view roles.
+   */
+  protected buildQuery() {
+    const logicExpression = this.buildLogicExpression();
+
+    return (builder) => {
+      this.buildFilterQuery(
+        this.model,
+        this.filterRoles,
+        logicExpression
+      )(builder);
+    };
+  }
+
+  /**
+   * Sets filter roles relations if field was relation type.
+   */
+  private setFilterRolesRelations() {
+    this.filterRoles.forEach((relationRole) => {
+      this.setRelationIfRelationField(relationRole.fieldKey);
+    });
+  }
+}
--- a/packages/server/src/lib/DynamicFilter/DynamicFilterQueryParser.ts
+++ b/packages/server/src/lib/DynamicFilter/DynamicFilterQueryParser.ts
@@ -0,0 +1,72 @@
+import { OPERATION } from '../LogicEvaluation/Parser';
+
+export default class QueryParser {
+  constructor(tree, queries) {
+    this.tree = tree;
+    this.queries = queries;
+    this.query = null;
+  }
+
+  setQuery(query) {
+    this.query = query.clone();
+  }
+
+  parse() {
+    return this.parseNode(this.tree);
+  }
+
+  parseNode(node) {
+    if (typeof node === 'string') {
+      const nodeQuery = this.getQuery(node);
+      return (query) => {
+        nodeQuery(query);
+      };
+    }
+    if (OPERATION[node.operation] === undefined) {
+      throw new Error(`unknow expression ${node.operation}`);
+    }
+    const leftQuery = this.getQuery(node.left);
+    const rightQuery = this.getQuery(node.right);
+
+    switch (node.operation) {
+      case '&&':
+      case 'AND':
+      default:
+        return (nodeQuery) =>
+          nodeQuery.where((query) => {
+            query.where((q) => {
+              leftQuery(q);
+            });
+            query.andWhere((q) => {
+              rightQuery(q);
+            });
+          });
+      case '||':
+      case 'OR':
+        return (nodeQuery) =>
+          nodeQuery.where((query) => {
+            query.where((q) => {
+              leftQuery(q);
+            });
+            query.orWhere((q) => {
+              rightQuery(q);
+            });
+          });
+    }
+  }
+
+  getQuery(node) {
+    if (typeof node !== 'string' && node !== null) {
+      return this.parseNode(node);
+    }
+    const value = parseFloat(node);
+
+    if (!isNaN(value)) {
+      if (typeof this.queries[node] === 'undefined') {
+        throw new Error(`unknow query under index ${node}`);
+      }
+      return this.queries[node];
+    }
+    return null;
+  }
+}
--- a/packages/server/src/lib/DynamicFilter/DynamicFilterRoleAbstructor.ts
+++ b/packages/server/src/lib/DynamicFilter/DynamicFilterRoleAbstructor.ts
@@ -0,0 +1,387 @@
+import moment from 'moment';
+import * as R from 'ramda';
+import { IFilterRole, IDynamicFilter, IModel } from '@/interfaces';
+import Parser from '../LogicEvaluation/Parser';
+import DynamicFilterQueryParser from './DynamicFilterQueryParser';
+import { Lexer } from '../LogicEvaluation/Lexer';
+import { COMPARATOR_TYPE, FIELD_TYPE } from './constants';
+
+export default abstract class DynamicFilterAbstructor
+  implements IDynamicFilter
+{
+  protected filterRoles: IFilterRole[] = [];
+  protected tableName: string;
+  protected model: IModel;
+  protected responseMeta: { [key: string]: any } = {};
+  public relationFields = [];
+
+  /**
+   * Sets model the dynamic filter service.
+   * @param {IModel} model
+   */
+  public setModel(model: IModel) {
+    this.model = model;
+    this.tableName = model.tableName;
+  }
+
+  /**
+   * Transformes filter roles to map by index.
+   * @param {IModel} model
+   * @param {IFilterRole[]} roles
+   * @returns
+   */
+  protected convertRolesMapByIndex = (model, roles) => {
+    const rolesIndexSet = {};
+
+    roles.forEach((role) => {
+      rolesIndexSet[role.index] = this.buildRoleQuery(model, role);
+    });
+    return rolesIndexSet;
+  };
+
+  /**
+   * Builds database query from stored view roles.
+   * @param {Array} roles -
+   * @return {Function}
+   */
+  protected buildFilterRolesQuery = (
+    model: IModel,
+    roles: IFilterRole[],
+    logicExpression: string = ''
+  ) => {
+    const rolesIndexSet = this.convertRolesMapByIndex(model, roles);
+
+    // Lexer for logic expression.
+    const lexer = new Lexer(logicExpression);
+    const tokens = lexer.getTokens();
+
+    // Parse the logic expression.
+    const parser = new Parser(tokens);
+    const parsedTree = parser.parse();
+
+    const queryParser = new DynamicFilterQueryParser(parsedTree, rolesIndexSet);
+
+    return queryParser.parse();
+  };
+
+  /**
+   * Parses the logic expression to base expression.
+   * @param {string} logicExpression - 
+   * @return {string}
+   */
+  private parseLogicExpression(logicExpression: string): string {
+    return R.compose(
+      R.replace(/or|OR/g, '||'),
+      R.replace(/and|AND/g, '&&'),
+    )(logicExpression);
+  }
+
+  /**
+   * Builds filter query for query builder.
+   * @param {String} tableName - Table name.
+   * @param {Array} roles - Filter roles.
+   * @param {String} logicExpression - Logic expression.
+   */
+  protected buildFilterQuery = (
+    model: IModel,
+    roles: IFilterRole[],
+    logicExpression: string
+  ) => {
+    const basicExpression = this.parseLogicExpression(logicExpression);
+
+    return (builder) => {
+      this.buildFilterRolesQuery(model, roles, basicExpression)(builder);
+    };
+  };
+
+  /**
+   * Retrieve relation column of comparator fieldز
+   */
+  private getFieldComparatorRelationColumn(field) {
+    const relation = this.model.relationMappings[field.relationKey];
+
+    if (relation) {
+      const relationModel = relation.modelClass;
+      const relationColumn =
+        field.relationEntityKey === 'id'
+          ? 'id'
+          : relationModel.getField(field.relationEntityKey, 'column');
+
+      return `${relationModel.tableName}.${relationColumn}`;
+    }
+  }
+
+  /**
+   * Retrieve the comparator field column.
+   * @param {IModel} model -
+   * @param {} -
+   */
+  private getFieldComparatorColumn = (field) => {
+    return field.fieldType === FIELD_TYPE.RELATION
+      ? this.getFieldComparatorRelationColumn(field)
+      : `${this.tableName}.${field.column}`;
+  };
+
+  /**
+   * Builds roles queries.
+   * @param {IModel} model -
+   * @param {Object} role -
+   */
+  protected buildRoleQuery = (model: IModel, role: IFilterRole) => {
+    const field = model.getField(role.fieldKey);
+    const comparatorColumn = this.getFieldComparatorColumn(field);
+
+    // Field relation custom query.
+    if (typeof field.filterCustomQuery !== 'undefined') {
+      return (builder) => {
+        field.filterCustomQuery(builder, role);
+      };
+    }
+    switch (field.fieldType) {
+      case FIELD_TYPE.BOOLEAN:
+      case FIELD_TYPE.ENUMERATION:
+        return this.booleanRoleQueryBuilder(role, comparatorColumn);
+      case FIELD_TYPE.NUMBER:
+        return this.numberRoleQueryBuilder(role, comparatorColumn);
+      case FIELD_TYPE.DATE:
+        return this.dateQueryBuilder(role, comparatorColumn);
+      case FIELD_TYPE.TEXT:
+      default:
+        return this.textRoleQueryBuilder(role, comparatorColumn);
+    }
+  };
+
+  /**
+   * Boolean column query builder.
+   * @param {IFilterRole} role
+   * @param {string} comparatorColumn
+   * @returns
+   */
+  protected booleanRoleQueryBuilder = (
+    role: IFilterRole,
+    comparatorColumn: string
+  ) => {
+    switch (role.comparator) {
+      case COMPARATOR_TYPE.EQUALS:
+      case COMPARATOR_TYPE.EQUAL:
+      case COMPARATOR_TYPE.IS:
+      default:
+        return (builder) => {
+          builder.where(comparatorColumn, '=', role.value);
+        };
+      case COMPARATOR_TYPE.NOT_EQUAL:
+      case COMPARATOR_TYPE.NOT_EQUALS:
+      case COMPARATOR_TYPE.IS_NOT:
+        return (builder) => {
+          builder.where(comparatorColumn, '<>', role.value);
+        };
+    }
+  };
+
+  /**
+   * Numeric column query builder.
+   * @param {IFilterRole} role
+   * @param {string} comparatorColumn
+   * @returns
+   */
+  protected numberRoleQueryBuilder = (
+    role: IFilterRole,
+    comparatorColumn: string
+  ) => {
+    switch (role.comparator) {
+      case COMPARATOR_TYPE.EQUALS:
+      case COMPARATOR_TYPE.EQUAL:
+      default:
+        return (builder) => {
+          builder.where(comparatorColumn, '=', role.value);
+        };
+      case COMPARATOR_TYPE.NOT_EQUAL:
+      case COMPARATOR_TYPE.NOT_EQUALS:
+        return (builder) => {
+          builder.whereNot(comparatorColumn, role.value);
+        };
+      case COMPARATOR_TYPE.BIGGER_THAN:
+      case COMPARATOR_TYPE.BIGGER:
+        return (builder) => {
+          builder.where(comparatorColumn, '>', role.value);
+        };
+      case COMPARATOR_TYPE.BIGGER_OR_EQUALS:
+        return (builder) => {
+          builder.where(comparatorColumn, '>=', role.value);
+        };
+      case COMPARATOR_TYPE.SMALLER_THAN:
+      case COMPARATOR_TYPE.SMALLER:
+        return (builder) => {
+          builder.where(comparatorColumn, '<', role.value);
+        };
+      case COMPARATOR_TYPE.SMALLER_OR_EQUALS:
+        return (builder) => {
+          builder.where(comparatorColumn, '<=', role.value);
+        };
+    }
+  };
+
+  /**
+   * Text column query builder.
+   * @param {IFilterRole} role
+   * @param {string} comparatorColumn
+   * @returns {Function}
+   */
+  protected textRoleQueryBuilder = (
+    role: IFilterRole,
+    comparatorColumn: string
+  ) => {
+    switch (role.comparator) {
+      case COMPARATOR_TYPE.EQUAL:
+      case COMPARATOR_TYPE.EQUALS:
+      case COMPARATOR_TYPE.IS:
+      default:
+        return (builder) => {
+          builder.where(comparatorColumn, role.value);
+        };
+      case COMPARATOR_TYPE.NOT_EQUALS:
+      case COMPARATOR_TYPE.NOT_EQUAL:
+      case COMPARATOR_TYPE.IS_NOT:
+        return (builder) => {
+          builder.whereNot(comparatorColumn, role.value);
+        };
+      case COMPARATOR_TYPE.CONTAIN:
+      case COMPARATOR_TYPE.CONTAINS:
+        return (builder) => {
+          builder.where(comparatorColumn, 'LIKE', `%${role.value}%`);
+        };
+      case COMPARATOR_TYPE.NOT_CONTAIN:
+      case COMPARATOR_TYPE.NOT_CONTAINS:
+        return (builder) => {
+          builder.whereNot(comparatorColumn, 'LIKE', `%${role.value}%`);
+        };
+      case COMPARATOR_TYPE.STARTS_WITH:
+      case COMPARATOR_TYPE.START_WITH:
+        return (builder) => {
+          builder.where(comparatorColumn, 'LIKE', `${role.value}%`);
+        };
+      case COMPARATOR_TYPE.ENDS_WITH:
+      case COMPARATOR_TYPE.END_WITH:
+        return (builder) => {
+          builder.where(comparatorColumn, 'LIKE', `%${role.value}`);
+        };
+
+    }
+  };
+
+  /**
+   * Date column query builder.
+   * @param {IFilterRole} role
+   * @param {string} comparatorColumn
+   * @returns {Function}
+   */
+  protected dateQueryBuilder = (
+    role: IFilterRole,
+    comparatorColumn: string
+  ) => {
+    switch (role.comparator) {
+      case COMPARATOR_TYPE.AFTER:
+      case COMPARATOR_TYPE.BEFORE:
+        return (builder) => {
+          this.dateQueryAfterBeforeComparator(role, comparatorColumn, builder);
+        };
+      case COMPARATOR_TYPE.IN:
+        return (builder) => {
+          this.dateQueryInComparator(role, comparatorColumn, builder);
+        };
+    }
+  };
+
+  /**
+   * Date query 'IN' comparator type.
+   * @param {IFilterRole} role
+   * @param {string} comparatorColumn
+   * @param builder
+   */
+  protected dateQueryInComparator = (
+    role: IFilterRole,
+    comparatorColumn: string,
+    builder
+  ) => {
+    const hasTimeFormat = moment(
+      role.value,
+      'YYYY-MM-DD HH:MM',
+      true
+    ).isValid();
+    const dateFormat = 'YYYY-MM-DD HH:MM:SS';
+
+    if (hasTimeFormat) {
+      const targetDateTime = moment(role.value).format(dateFormat);
+      builder.where(comparatorColumn, '=', targetDateTime);
+    } else {
+      const startDate = moment(role.value).startOf('day');
+      const endDate = moment(role.value).endOf('day');
+
+      builder.where(comparatorColumn, '>=', startDate.format(dateFormat));
+      builder.where(comparatorColumn, '<=', endDate.format(dateFormat));
+    }
+  };
+
+  /**
+   * Date query after/before comparator type.
+   * @param {IFilterRole} role
+   * @param {string} comparatorColumn - Column.
+   * @param builder
+   */
+  protected dateQueryAfterBeforeComparator = (
+    role: IFilterRole,
+    comparatorColumn: string,
+    builder
+  ) => {
+    const comparator = role.comparator === COMPARATOR_TYPE.BEFORE ? '<' : '>';
+    const hasTimeFormat = moment(
+      role.value,
+      'YYYY-MM-DD HH:MM',
+      true
+    ).isValid();
+    const targetDate = moment(role.value);
+    const dateFormat = 'YYYY-MM-DD HH:MM:SS';
+
+    if (!hasTimeFormat) {
+      if (role.comparator === COMPARATOR_TYPE.BEFORE) {
+        targetDate.startOf('day');
+      } else {
+        targetDate.endOf('day');
+      }
+    }
+    const comparatorValue = targetDate.format(dateFormat);
+    builder.where(comparatorColumn, comparator, comparatorValue);
+  };
+
+  /**
+   * Registers relation field if the given field was relation type
+   * and not registered.
+   * @param {string} fieldKey - Field key.
+   */
+  protected setRelationIfRelationField = (fieldKey: string): void => {
+    const field = this.model.getField(fieldKey);
+    const isAlreadyRegistered = this.relationFields.some(
+      (field) => field === fieldKey
+    );
+
+    if (
+      !isAlreadyRegistered &&
+      field &&
+      field.fieldType === FIELD_TYPE.RELATION
+    ) {
+      this.relationFields.push(field.relationKey);
+    }
+  };
+
+  /**
+   * Retrieve the model.
+   */
+  getModel() {
+    return this.model;
+  }
+
+  /**
+   * On initialize the registered dynamic filter.
+   */
+  onInitialize() {}
+}
--- a/packages/server/src/lib/DynamicFilter/DynamicFilterSearch.ts
+++ b/packages/server/src/lib/DynamicFilter/DynamicFilterSearch.ts
@@ -0,0 +1,48 @@
+import { IFilterRole } from '@/interfaces';
+import DynamicFilterFilterRoles from './DynamicFilterFilterRoles';
+
+export default class DynamicFilterSearch extends DynamicFilterFilterRoles {
+  private searchKeyword: string;
+  private filterRoles: IFilterRole[];
+
+  /**
+   * Constructor method.
+   * @param {string} searchKeyword - Search keyword.
+   */
+  constructor(searchKeyword: string) {
+    super();
+    this.searchKeyword = searchKeyword;
+  }
+
+  /**
+   * On initialize the dynamic filter.
+   */
+  public onInitialize() {
+    super.onInitialize();
+    this.filterRoles = this.getModelSearchFilterRoles(this.searchKeyword);
+  }
+
+  /**
+   * Retrieve the filter roles from model search roles.
+   * @param {string} searchKeyword 
+   * @returns {IFilterRole[]}
+   */
+  private getModelSearchFilterRoles(searchKeyword: string): IFilterRole[] {
+    const model = this.getModel();
+
+    return model.searchRoles.map((searchRole, index) => ({
+      ...searchRole,
+      value: searchKeyword,
+      index: index + 1,
+    }));
+  }
+
+  /**
+   * 
+   */
+  setResponseMeta() {
+    this.responseMeta = {
+      searchKeyword: this.searchKeyword,
+    };
+  }
+}
--- a/packages/server/src/lib/DynamicFilter/DynamicFilterSortBy.ts
+++ b/packages/server/src/lib/DynamicFilter/DynamicFilterSortBy.ts
@@ -0,0 +1,92 @@
+import DynamicFilterRoleAbstructor from '@/lib/DynamicFilter/DynamicFilterRoleAbstructor';
+import { FIELD_TYPE } from './constants';
+
+interface ISortRole {
+  fieldKey: string;
+  order: string;
+}
+
+export default class DynamicFilterSortBy extends DynamicFilterRoleAbstructor {
+  private sortRole: ISortRole = {};
+
+  /**
+   * Constructor method.
+   * @param {string} sortByFieldKey
+   * @param {string} sortDirection
+   */
+  constructor(sortByFieldKey: string, sortDirection: string) {
+    super();
+
+    this.sortRole = {
+      fieldKey: sortByFieldKey,
+      order: sortDirection,
+    };
+    this.setResponseMeta();
+  }
+
+  /**
+   * On initialize the dyanmic sort by.
+   */
+  public onInitialize() {
+    this.setRelationIfRelationField(this.sortRole.fieldKey);
+  }
+
+  /**
+   * Retrieve field comparator relatin column.
+   * @param field 
+   * @returns {string}
+   */
+  private getFieldComparatorRelationColumn = (field): string => {
+    const relation = this.model.relationMappings[field.relationKey];
+
+    if (relation) {
+      const relationModel = relation.modelClass;
+      const relationField = relationModel.getField(field.relationEntityLabel);
+
+      return `${relationModel.tableName}.${relationField.column}`;
+    }
+    return '';
+  };
+
+  /**
+   * Retrieve the comparator field column.
+   * @param {IModel} field
+   * @returns {string}
+   */
+  private getFieldComparatorColumn = (field): string => {
+    return field.fieldType === FIELD_TYPE.RELATION
+      ? this.getFieldComparatorRelationColumn(field)
+      : `${this.tableName}.${field.column}`;
+  };
+
+  /**
+   * Builds database query of sort by column on the given direction.
+   */
+  public buildQuery = () => {
+    const field = this.model.getField(this.sortRole.fieldKey);
+    const comparatorColumn = this.getFieldComparatorColumn(field);
+
+    // Sort custom query.
+    if (typeof field.sortCustomQuery !== 'undefined') {
+      return (builder) => {
+        field.sortCustomQuery(builder, this.sortRole);
+      };
+    }
+
+    return (builder) => {
+      if (this.sortRole.fieldKey) {
+        builder.orderBy(`${comparatorColumn}`, this.sortRole.order);
+      }
+    };
+  };
+
+  /**
+   * Sets response meta.
+   */
+  public setResponseMeta() {
+    this.responseMeta = {
+      sortOrder: this.sortRole.fieldKey,
+      sortBy: this.sortRole.order,
+    };
+  }
+}
--- a/packages/server/src/lib/DynamicFilter/DynamicFilterViews.ts
+++ b/packages/server/src/lib/DynamicFilter/DynamicFilterViews.ts
@@ -0,0 +1,56 @@
+import { omit } from 'lodash';
+import { IView, IViewRole } from '@/interfaces';
+import DynamicFilterRoleAbstructor from './DynamicFilterRoleAbstructor';
+
+export default class DynamicFilterViews extends DynamicFilterRoleAbstructor {
+  private viewSlug: string;
+  private logicExpression: string;
+  private filterRoles: IViewRole[];
+  private viewColumns = [];
+
+  /**
+   * Constructor method.
+   * @param {IView} view -
+   */
+  constructor(view: IView) {
+    super();
+
+    this.viewSlug = view.slug;
+    this.filterRoles = view.roles;
+    this.viewColumns = view.columns;
+    this.logicExpression = view.rolesLogicExpression
+      .replace('AND', '&&')
+      .replace('OR', '||');
+
+    this.setResponseMeta();
+  }
+
+  /**
+   * Builds database query of view roles.
+   */
+  public buildQuery() {
+    return (builder) => {
+      this.buildFilterQuery(
+        this.model,
+        this.filterRoles,
+        this.logicExpression
+      )(builder);
+    };
+  }
+
+  /**
+   * Sets response meta.
+   */
+  public setResponseMeta() {
+    this.responseMeta = {
+      view: {
+        logicExpression: this.logicExpression,
+        filterRoles: this.filterRoles.map((filterRole) => ({
+          ...omit(filterRole, ['id', 'viewId']),
+        })),
+        viewSlug: this.viewSlug,
+        viewColumns: this.viewColumns,
+      },
+    };
+  }
+}
--- a/packages/server/src/lib/DynamicFilter/constants.ts
+++ b/packages/server/src/lib/DynamicFilter/constants.ts
@@ -0,0 +1,43 @@
+export const COMPARATOR_TYPE = {
+  EQUAL: 'equal',
+  EQUALS: 'equals',
+
+  NOT_EQUAL: 'not_equal',
+  NOT_EQUALS: 'not_equals',
+
+  BIGGER_THAN: 'bigger_than',
+  BIGGER: 'bigger',
+  BIGGER_OR_EQUALS: 'bigger_or_equals',
+
+  SMALLER_THAN: 'smaller_than',
+  SMALLER: 'smaller',
+  SMALLER_OR_EQUALS: 'smaller_or_equals',
+
+  IS: 'is',
+  IS_NOT: 'is_not',
+
+  CONTAINS: 'contains',
+  CONTAIN: 'contain',
+  NOT_CONTAINS: 'contains',
+  NOT_CONTAIN: 'contain',
+
+  AFTER: 'after',
+  BEFORE: 'before',
+  IN: 'in',
+
+  STARTS_WITH: 'starts_with',
+  START_WITH: 'start_with',
+
+  ENDS_WITH: 'ends_with',
+  END_WITH: 'end_with'
+};
+
+export const FIELD_TYPE = {
+  TEXT: 'text',
+  NUMBER: 'number',
+  ENUMERATION: 'enumeration',
+  BOOLEAN: 'boolean',
+  RELATION: 'relation',
+  DATE: 'date',
+  COMPUTED: 'computed'
+};
--- a/packages/server/src/lib/DynamicFilter/index.ts
+++ b/packages/server/src/lib/DynamicFilter/index.ts
@@ -0,0 +1,13 @@
+
+
+import DynamicFilter from './DynamicFilter';
+import DynamicFilterSortBy from './DynamicFilterSortBy';
+import DynamicFilterViews from './DynamicFilterViews';
+import DynamicFilterFilterRoles from './DynamicFilterFilterRoles';
+
+export {
+  DynamicFilter,
+  DynamicFilterSortBy,
+  DynamicFilterViews,
+  DynamicFilterFilterRoles,
+};
--- a/packages/server/src/lib/EventPublisher/EventPublisher.ts
+++ b/packages/server/src/lib/EventPublisher/EventPublisher.ts
@@ -0,0 +1,66 @@
+import { Container } from 'typedi';
+import { EventEmitter2 } from 'eventemitter2';
+
+interface IEventPublisherArgs {
+  subscribers: EventSubscriber[];
+}
+class PublishEvent {
+  constructor(public id: string) {}
+}
+
+type SubscribeListenerFunction = (event: PublishEvent) => void;
+type SubscribeFunction = (id: string, cb: SubscribeListenerFunction) => void;
+
+interface IEventBus {
+  subscribe: SubscribeFunction;
+}
+
+export abstract class EventSubscriber {
+  abstract attach(bus: IEventBus): void;
+}
+
+export class EventPublisher {
+  private emitter: EventEmitter2;
+
+  /**
+   *
+   * @param {IEventPublisherArgs} args
+   */
+  constructor() {
+    this.emitter = new EventEmitter2({ wildcard: true, delimiter: '.' });
+  }
+
+  /**
+   *
+   * @param {EventSubscriber} args
+   */
+  loadSubscribers(subscribers: EventSubscriber[]) {
+    const bus: IEventBus = {
+      subscribe: (id, cb) => {
+        this.emitter.on(id, cb);
+      },
+    };
+    for (const Subscriber of subscribers) {
+      const subscriberInstance = Container.get(Subscriber);
+      subscriberInstance.attach(bus);
+    }
+  }
+
+  /**
+   *
+   * @param event
+   * @param payload
+   */
+  emit(event: string, payload) {
+    return this.emitter.emit(event, payload);
+  }
+
+  /**
+   *
+   * @param event
+   * @param payload
+   */
+  emitAsync(event: string, payload) {
+    return this.emitter.emitAsync(event, payload);
+  }
+}
--- a/packages/server/src/lib/KnexFactory/index.js
+++ b/packages/server/src/lib/KnexFactory/index.js
@@ -0,0 +1,55 @@
+const { extend, isFunction, isObject } = require('lodash');
+
+export default class KnexFactory {
+
+  constructor(knex) {
+    this.knex = knex;
+
+    this.factories = [];
+  }
+
+  define(name, tableName, defaultAttributes) {
+    this.factories[name] = { tableName, defaultAttributes };
+  }
+
+  async build(factoryName, attributes) {
+    const factory = this.factories[factoryName];
+
+    if (!factory) {
+      throw `Unkown factory: ${factoryName}`;
+    }
+    let { defaultAttributes } = factory;
+    const insertData = {};
+    
+    if( 'function' === typeof defaultAttributes) {
+      defaultAttributes = await defaultAttributes();
+    }
+    extend(insertData, defaultAttributes, attributes);
+
+    for (let k in insertData) {
+      const v = insertData[k];
+
+      if (isFunction(v)) {
+        insertData[k] = await v();
+      } else {
+        insertData[k] = await v;
+      }
+      if (isObject(insertData[k]) && insertData[k].id) {
+        insertData[k] = insertData[k].id;
+      }
+    };
+
+    return insertData;
+  }
+
+  async create(factoryName, attributes) {
+    const factory = this.factories[factoryName];
+    const insertData = await this.build(factoryName, attributes);
+    const { tableName } = factory;
+
+    const [id] = await this.knex(tableName).insert(insertData);
+    const record = await this.knex(tableName).where({ id }).first();
+
+    return record;
+  }
+}
--- a/packages/server/src/lib/LogicEvaluation/Lexer.js
+++ b/packages/server/src/lib/LogicEvaluation/Lexer.js
@@ -0,0 +1,172 @@
+
+const OperationType = {
+  LOGIC: 'LOGIC',
+  STRING: 'STRING',
+  COMPARISON: 'COMPARISON',
+  MATH: 'MATH',
+};
+
+export class Lexer {
+  // operation table
+  static get optable() {
+    return {
+      '=': OperationType.LOGIC,
+      '&': OperationType.LOGIC,
+      '|': OperationType.LOGIC,
+      '?': OperationType.LOGIC,
+      ':': OperationType.LOGIC,
+
+      '\'': OperationType.STRING,
+      '"': OperationType.STRING,
+
+      '!': OperationType.COMPARISON,
+      '>': OperationType.COMPARISON,
+      '<': OperationType.COMPARISON,
+
+      '(': OperationType.MATH,
+      ')': OperationType.MATH,
+      '+': OperationType.MATH,
+      '-': OperationType.MATH,
+      '*': OperationType.MATH,
+      '/': OperationType.MATH,
+      '%': OperationType.MATH,
+    };
+  }
+
+  /**
+   * Constructor
+   * @param {*} expression -
+   */
+  constructor(expression) {
+    this.currentIndex = 0;
+    this.input = expression;
+    this.tokenList = [];
+  }
+
+  getTokens() {
+    let tok;
+    do {
+      // read current token, so step should be -1
+      tok = this.pickNext(-1);
+      const pos = this.currentIndex;
+      switch (Lexer.optable[tok]) {
+        case OperationType.LOGIC:
+          // == && || ===
+          this.readLogicOpt(tok);
+          break;
+
+        case OperationType.STRING:
+          this.readString(tok);
+          break;
+
+        case OperationType.COMPARISON:
+          this.readCompare(tok);
+          break;
+
+        case OperationType.MATH:
+          this.receiveToken();
+          break;
+
+        default:
+          this.readValue(tok);
+      }
+
+      // if the pos not changed, this loop will go into a infinite loop, every step of while loop,
+      // we must move the pos forward
+      // so here we should throw error, for example `1 & 2`
+      if (pos === this.currentIndex && tok !== undefined) {
+        const err = new Error(`unkonw token ${tok} from input string ${this.input}`);
+        err.name = 'UnknowToken';
+        throw err;
+      }
+    } while (tok !== undefined)
+
+    return this.tokenList;
+  }
+
+  /**
+   * read next token, the index param can set next step, default go foward 1 step
+   *
+   * @param index next postion
+   */
+  pickNext(index = 0) {
+    return this.input[index + this.currentIndex + 1];
+  }
+
+  /**
+   * Store token into result tokenList, and move the pos index
+   *
+   * @param index
+   */
+  receiveToken(index = 1) {
+    const tok = this.input.slice(this.currentIndex, this.currentIndex + index).trim();
+    // skip empty string
+    if (tok) {
+      this.tokenList.push(tok);
+    }
+
+    this.currentIndex += index;
+  }
+
+  // ' or "
+  readString(tok) {
+    let next;
+    let index = 0;
+    do {
+      next = this.pickNext(index);
+      index += 1;
+    } while (next !== tok && next !== undefined);
+    this.receiveToken(index + 1);
+  }
+
+  // > or < or >= or <= or !==
+  // tok in (>, <, !)
+  readCompare(tok) {
+    if (this.pickNext() !== '=') {
+      this.receiveToken(1);
+      return;
+    }
+    // !==
+    if (tok === '!' && this.pickNext(1) === '=') {
+      this.receiveToken(3);
+      return;
+    }
+    this.receiveToken(2);
+  }
+
+  // === or ==
+  // && ||
+  readLogicOpt(tok) {
+    if (this.pickNext() === tok) {
+      // ===
+      if (tok === '=' && this.pickNext(1) === tok) {
+        return this.receiveToken(3);
+      }
+      // == && ||
+      return this.receiveToken(2);
+    }
+    // handle as &&
+    // a ? b : c is equal to a && b || c
+    if (tok === '?' || tok === ':') {
+      return this.receiveToken(1);
+    }
+  }
+
+  readValue(tok) {
+    if (!tok) {
+      return;
+    }
+
+    let index = 0;
+    while (!Lexer.optable[tok] && tok !== undefined) {
+      tok = this.pickNext(index);
+      index += 1;
+    }
+    this.receiveToken(index);
+  }
+}
+
+export default function token(expression) {
+  const lexer = new Lexer(expression);
+  return lexer.getTokens();
+}
--- a/packages/server/src/lib/LogicEvaluation/Parser.js
+++ b/packages/server/src/lib/LogicEvaluation/Parser.js
@@ -0,0 +1,159 @@
+export const OPERATION = {
+  '!': 5,
+  '*': 4,
+  '/': 4,
+  '%': 4,
+  '+': 3,
+  '-': 3,
+  '>': 2,
+  '<': 2,
+  '>=': 2,
+  '<=': 2,
+  '===': 2,
+  '!==': 2,
+  '==': 2,
+  '!=': 2,
+  '&&': 1,
+  '||': 1,
+  '?': 1,
+  ':': 1,
+};
+
+// export interface Node {
+//   left: Node | string | null;
+//   right: Node | string | null;
+//   operation: string;
+//   grouped?: boolean;
+// };
+
+export default class Parser {
+
+  constructor(token) {
+    this.index = -1;
+    this.blockLevel = 0;
+    this.token = token;
+  }
+
+  /**
+   * 
+   * @return {Node | string} =- 
+   */
+  parse() {
+    let tok;
+    let root = {
+      left: null,
+      right: null,
+      operation: null,
+    };
+
+    do {
+      tok = this.parseStatement();
+
+      if (tok === null || tok === undefined) {
+        break;
+      }
+
+      if (root.left === null) {
+        root.left = tok;
+        root.operation = this.nextToken();
+
+        if (!root.operation) {
+          return tok;
+        }
+
+        root.right = this.parseStatement();
+      } else {
+        if (typeof tok !== 'string') {
+          throw new Error('operation must be string, but get ' + JSON.stringify(tok));
+        }
+        root = this.addNode(tok, this.parseStatement(), root);
+      }
+    } while (tok);
+
+    return root;
+  }
+
+  nextToken() {
+    this.index += 1;
+    return this.token[this.index];
+  }
+
+  prevToken() {
+    return this.token[this.index - 1];
+  }
+
+  /**
+   * 
+   * @param {string} operation 
+   * @param {Node|String|null} right 
+   * @param {Node} root 
+   */
+  addNode(operation, right, root) {
+    let pre = root;
+    
+    if (this.compare(pre.operation, operation) < 0 && !pre.grouped) {
+      
+      while (pre.right !== null &&
+        typeof pre.right !== 'string' &&
+        this.compare(pre.right.operation, operation) < 0 && !pre.right.grouped) {
+        pre = pre.right;
+      }
+
+      pre.right = {
+        operation,
+        left: pre.right,
+        right,
+      };
+      return root;
+    }
+    return {
+      left: pre,
+      right,
+      operation,
+    }
+  }
+
+  /**
+   * 
+   * @param {String} a 
+   * @param {String} b 
+   */
+  compare(a, b) {
+    if (!OPERATION.hasOwnProperty(a) || !OPERATION.hasOwnProperty(b)) {
+      throw new Error(`unknow operation ${a} or ${b}`);
+    }
+    return OPERATION[a] - OPERATION[b];
+  }
+
+  /**
+   * @return string | Node | null
+   */
+  parseStatement() {
+    const token = this.nextToken();
+    if (token === '(') {
+      this.blockLevel += 1;
+      const node = this.parse();
+      this.blockLevel -= 1;
+
+      if (typeof node !== 'string') {
+        node.grouped = true;
+      }
+      return node;
+    }
+
+    if (token === ')') {
+      return null;
+    }
+
+    if (token === '!') {
+      return { left: null, operation: token, right: this.parseStatement() }
+    }
+
+    // 3 > -12 or -12 + 10
+    if (token === '-' && (OPERATION[this.prevToken()] > 0 || this.prevToken() === undefined)) {
+      return { left: '0', operation: token, right: this.parseStatement(), grouped: true };
+    }
+
+    return token;
+  }
+}
--- a/packages/server/src/lib/LogicEvaluation/QueryParser.js
+++ b/packages/server/src/lib/LogicEvaluation/QueryParser.js
@@ -0,0 +1,61 @@
+import { OPERATION } from './Parser';
+
+export default class QueryParser {
+
+  constructor(tree, queries) {
+    this.tree = tree;
+    this.queries = queries;
+    this.query = null;
+  }
+
+  setQuery(query) {
+    this.query = query.clone();
+  }
+
+  parse() {
+    return this.parseNode(this.tree);
+  }
+
+  parseNode(node) {
+    if (typeof node === 'string') {
+      const nodeQuery = this.getQuery(node);
+      return (query) => { nodeQuery(query); };
+    }
+    if (OPERATION[node.operation] === undefined) {
+      throw new Error(`unknow expression ${node.operation}`);
+    }
+    const leftQuery = this.getQuery(node.left);
+    const rightQuery = this.getQuery(node.right);
+
+    switch (node.operation) {
+      case '&&':
+      case 'AND':
+      default:
+        return (nodeQuery) => nodeQuery.where((query) => {
+          query.where((q) => { leftQuery(q); });
+          query.andWhere((q) => { rightQuery(q); });
+        });
+      case '||':
+      case 'OR':
+        return (nodeQuery) => nodeQuery.where((query) => {
+          query.where((q) => { leftQuery(q); });
+          query.orWhere((q) => { rightQuery(q); });
+        });
+    }
+  }
+
+  getQuery(node) {
+    if (typeof node !== 'string' && node !== null) {
+      return this.parseNode(node);
+    }
+    const value = parseFloat(node);
+
+    if (!isNaN(value)) {
+      if (typeof this.queries[node] === 'undefined') {
+        throw new Error(`unknow query under index ${node}`);
+      }
+      return this.queries[node];
+    }
+    return null;
+  }
+}
--- a/packages/server/src/lib/Mail/index.ts
+++ b/packages/server/src/lib/Mail/index.ts
@@ -0,0 +1,115 @@
+import fs from 'fs';
+import Mustache from 'mustache';
+import { Container } from 'typedi';
+import path from 'path';
+import { IMailable } from '@/interfaces';
+
+interface IMailAttachment {
+  filename: string;
+  path: string;
+  cid: string;
+}
+
+export default class Mail {
+  view: string;
+  subject: string;
+  to: string;
+  from: string = `${process.env.MAIL_FROM_NAME} ${process.env.MAIL_FROM_ADDRESS}`;
+  data: { [key: string]: string | number };
+  attachments: IMailAttachment[];
+
+  /**
+   * Mail options.
+   */
+  private get mailOptions() {
+    return {
+      to: this.to,
+      from: this.from,
+      subject: this.subject,
+      html: this.render(this.data),
+      attachments: this.attachments,
+    };
+  }
+
+  /**
+   * Sends the given mail to the target address.
+   */
+  public send() {
+    return new Promise((resolve, reject) => {
+      const Mail = Container.get('mail');
+
+      Mail.sendMail(this.mailOptions, (error) => {
+        if (error) {
+          reject(error);
+          return;
+        }
+        resolve(true);
+      });
+    });
+  }
+
+  /**
+   * Set send mail to address.
+   * @param {string} to -
+   */
+  setTo(to: string) {
+    this.to = to;
+    return this;
+  }
+
+  /**
+   * Sets from address to the mail.
+   * @param {string} from
+   * @return {}
+   */
+  private setFrom(from: string) {
+    this.from = from;
+    return this;
+  }
+
+  setAttachments(attachments: IMailAttachment[]) {
+    this.attachments = attachments;
+    return this;
+  }
+
+  /**
+   * Set mail subject.
+   * @param {string} subject
+   */
+  setSubject(subject: string) {
+    this.subject = subject;
+    return this;
+  }
+
+  /**
+   * Set view directory.
+   * @param {string} view
+   */
+  setView(view: string) {
+    this.view = view;
+    return this;
+  }
+
+  setData(data) {
+    this.data = data;
+    return this;
+  }
+
+  /**
+   * Renders the view template with the given data.
+   * @param  {object} data
+   * @return {string}
+   */
+  render(data): string {
+    const viewContent = this.getViewContent();
+    return Mustache.render(viewContent, data);
+  }
+
+  /**
+   * Retrieve view content from the view directory.
+   */
+  private getViewContent(): string {
+    const filePath = path.join(global.__root, `../views/${this.view}`);
+    return fs.readFileSync(filePath, 'utf8');
+  }
+}
--- a/packages/server/src/lib/Metable/MetableConfig.ts
+++ b/packages/server/src/lib/Metable/MetableConfig.ts
@@ -0,0 +1,40 @@
+import { get } from 'lodash';
+
+export default class MetableConfig {
+  readonly config: any;
+
+  constructor(config) {
+    this.setConfig(config);
+  }
+
+  /**
+   * Sets config. 
+   */
+  setConfig(config) {
+    this.config = config;
+  }
+ 
+  /**
+   * 
+   * @param {string} key 
+   * @param {string} group 
+   * @param {string} accessor 
+   * @returns {object|string}
+   */
+  getMetaConfig(key: string, group?: string, accessor?: string) {
+    const configGroup = get(this.config, group);
+    const config = get(configGroup, key);
+
+    return accessor ? get(config, accessor) : config;
+  }
+
+  /**
+   * 
+   * @param {string} key 
+   * @param {string} group 
+   * @returns {string}
+   */
+  getMetaType(key: string, group?: string) {
+    return this.getMetaConfig(key, group, 'type');
+  }
+}
--- a/packages/server/src/lib/Metable/MetableModel.js
+++ b/packages/server/src/lib/Metable/MetableModel.js
@@ -0,0 +1,12 @@
+
+
+export default class Metable{
+
+  static get modifiers() {
+    return {
+      whereKey(builder, key) {
+        builder.where('key', key);
+      },
+    };
+  }
+}
--- a/packages/server/src/lib/Metable/MetableStore.ts
+++ b/packages/server/src/lib/Metable/MetableStore.ts
@@ -0,0 +1,215 @@
+import { Model } from 'objection';
+import { omit, isEmpty } from 'lodash';
+import { IMetadata, IMetaQuery, IMetableStore } from '@/interfaces';
+import { itemsStartWith } from 'utils';
+
+export default class MetableStore implements IMetableStore {
+  metadata: IMetadata[];
+  model: Model;
+  extraColumns: string[];
+
+  /**
+   * Constructor method.
+   */
+  constructor() {
+    this.metadata = [];
+    this.model = null;
+    this.extraColumns = [];
+  }
+
+  /**
+   * Sets a extra columns.
+   * @param {Array} columns -
+   */
+  setExtraColumns(columns: string[]): void {
+    this.extraColumns = columns;
+  }
+
+  /**
+   * Find the given metadata key.
+   * @param {string|IMetaQuery} query -
+   * @returns {IMetadata} - Metadata object.
+   */
+  find(query: string | IMetaQuery): IMetadata {
+    const { key, value, ...extraColumns } = this.parseQuery(query);
+
+    return this.metadata.find((meta: IMetadata) => {
+      const isSameKey = meta.key === key;
+      const sameExtraColumns = this.extraColumns.some(
+        (extraColumn: string) => extraColumns[extraColumn] === meta[extraColumn]
+      );
+
+      const isSameExtraColumns = sameExtraColumns || isEmpty(extraColumns);
+
+      return isSameKey && isSameExtraColumns;
+    });
+  }
+
+  /**
+   * Retrieve all metadata.
+   * @returns {IMetadata[]}
+   */
+  all(): IMetadata[] {
+    return this.metadata
+      .filter((meta: IMetadata) => !meta._markAsDeleted)
+      .map((meta: IMetadata) =>
+        omit(meta, itemsStartWith(Object.keys(meta), '_'))
+      );
+  }
+
+  /**
+   * Retrieve metadata of the given key.
+   * @param {String} key -
+   * @param {Mixied} defaultValue -
+   */
+  get(query: string | IMetaQuery, defaultValue: any): any | false {
+    const metadata = this.find(query);
+    return metadata
+      ? metadata.value
+      : typeof defaultValue !== 'undefined'
+      ? defaultValue
+      : false;
+  }
+
+  /**
+   * Markes the metadata to should be deleted.
+   * @param {String} key -
+   */
+  remove(query: string | IMetaQuery): void {
+    const metadata: IMetadata = this.find(query);
+
+    if (metadata) {
+      metadata._markAsDeleted = true;
+    }
+  }
+
+  /**
+   * Remove all meta data of the given group.
+   * @param {string} group
+   */
+  removeAll(group: string = 'default'): void {
+    this.metadata = this.metadata.map((meta) => ({
+      ...meta,
+      _markAsDeleted: true,
+    }));
+  }
+
+  /**
+   * Set the meta data to the stack.
+   * @param {String} key -
+   * @param {String} value -
+   */
+  set(query: IMetaQuery | IMetadata[] | string, metaValue?: any): void {
+    if (Array.isArray(query)) {
+      const metadata = query;
+
+      metadata.forEach((meta: IMetadata) => {
+        this.set(meta);
+      });
+      return;
+    }
+    const { key, value, ...extraColumns } = this.parseQuery(query);
+    const metadata = this.find(query);
+    const newValue = metaValue || value;
+
+    if (metadata) {
+      metadata.value = newValue;
+      metadata._markAsUpdated = true;
+    } else {
+      this.metadata.push({
+        value: newValue,
+        key,
+        ...extraColumns,
+        _markAsInserted: true,
+      });
+    }
+  }
+
+  /**
+   * Parses query query.
+   * @param query
+   * @param value
+   */
+  parseQuery(query: string | IMetaQuery): IMetaQuery {
+    return typeof query !== 'object' ? { key: query } : { ...query };
+  }
+
+  /**
+   * Format the metadata before saving to the database.
+   * @param {string|number|boolean} value -
+   * @param {string} valueType -
+   * @return {string|number|boolean} -
+   */
+  static formatMetaValue(
+    value: string | boolean | number,
+    valueType: string
+  ): string | number | boolean {
+    let parsedValue;
+
+    switch (valueType) {
+      case 'number':
+        parsedValue = `${value}`;
+        break;
+      case 'boolean':
+        parsedValue = value ? '1' : '0';
+        break;
+      case 'json':
+        parsedValue = JSON.stringify(parsedValue);
+        break;
+      default:
+        parsedValue = value;
+        break;
+    }
+    return parsedValue;
+  }
+
+  /**
+   * Parse the metadata to the collection.
+   * @param {Array} collection -
+   */
+  mapMetadataToCollection(metadata: IMetadata[], parseType: string = 'parse') {
+    return metadata.map((model) =>
+      this.mapMetadataToCollection(model, parseType)
+    );
+  }
+
+  /**
+   * Load metadata to the metable collection.
+   * @param {Array} meta -
+   */
+  from(meta: []) {
+    if (Array.isArray(meta)) {
+      meta.forEach((m) => {
+        this.from(m);
+      });
+      return;
+    }
+    this.metadata.push(meta);
+  }
+
+  /**
+   *
+   * @returns {array}
+   */
+  toArray(): IMetadata[] {
+    return this.metadata;
+  }
+
+  /**
+   * Static method to load metadata to the collection.
+   * @param {Array} meta
+   */
+  static from(meta) {
+    const collection = new MetableCollection();
+    collection.from(meta);
+
+    return collection;
+  }
+
+  /**
+   * Reset the momerized metadata.
+   */
+  resetMetadata() {
+    this.metadata = [];
+  }
+}
--- a/packages/server/src/lib/Metable/MetableStoreDB.ts
+++ b/packages/server/src/lib/Metable/MetableStoreDB.ts
@@ -0,0 +1,243 @@
+import { IMetadata, IMetableStoreStorage } from '@/interfaces';
+import MetableStore from './MetableStore';
+import { isBlank, parseBoolean } from 'utils';
+import MetableConfig from './MetableConfig';
+import config from '@/data/options'
+export default class MetableDBStore
+  extends MetableStore
+  implements IMetableStoreStorage {
+  repository: any;
+  KEY_COLUMN: string;
+  VALUE_COLUMN: string;
+  TYPE_COLUMN: string;
+  extraQuery: Function;
+  loaded: Boolean;
+  config: MetableConfig;
+
+  /**
+   * Constructor method.
+   */
+  constructor() {
+    super();
+
+    this.loaded = false;
+    this.KEY_COLUMN = 'key';
+    this.VALUE_COLUMN = 'value';
+    this.TYPE_COLUMN = 'type';
+    this.repository = null;
+
+    this.extraQuery = (meta) => {
+      return {
+        key: meta[this.KEY_COLUMN],
+        ...this.transfromMetaExtraColumns(meta),
+      };
+    };
+    this.config = new MetableConfig(config);
+  }
+
+  /**
+   * Transformes meta query.
+   * @param {IMetadata} meta
+   */
+  private transfromMetaExtraColumns(meta: IMetadata) {
+    return this.extraColumns.reduce((obj, column) => {
+      const metaValue = meta[column];
+
+      if (!isBlank(metaValue)) {
+        obj[column] = metaValue;
+      }
+      return obj;
+    }, {});
+  }
+
+  /**
+   * Set repository entity of this metadata collection.
+   * @param {Object} repository -
+   */
+  setRepository(repository) {
+    this.repository = repository;
+  }
+
+  /**
+   * Sets a extra query callback.
+   * @param callback
+   */
+  setExtraQuery(callback) {
+    this.extraQuery = callback;
+  }
+
+  /**
+   * Saves the modified, deleted and insert metadata.
+   */
+  save() {
+    this.validateStoreIsLoaded();
+
+    return Promise.all([
+      this.saveUpdated(this.metadata),
+      this.saveDeleted(this.metadata),
+      this.saveInserted(this.metadata),
+    ]);
+  }
+
+  /**
+   * Saves the updated metadata.
+   * @param {IMetadata[]} metadata -
+   * @returns {Promise}
+   */
+  saveUpdated(metadata: IMetadata[]) {
+    const updated = metadata.filter((m) => m._markAsUpdated === true);
+    const opers = [];
+
+    updated.forEach((meta) => {
+      const updateOper = this.repository
+        .update(
+          { [this.VALUE_COLUMN]: meta.value },
+          { ...this.extraQuery(meta) }
+        )
+        .then(() => {
+          meta._markAsUpdated = false;
+        });
+      opers.push(updateOper);
+    });
+    return Promise.all(opers);
+  }
+
+  /**
+   * Saves the deleted metadata.
+   * @param {IMetadata[]} metadata -
+   * @returns {Promise}
+   */
+  saveDeleted(metadata: IMetadata[]) {
+    const deleted = metadata.filter(
+      (m: IMetadata) => m._markAsDeleted === true
+    );
+    const opers: Promise<void> = [];
+
+    if (deleted.length > 0) {
+      deleted.forEach((meta) => {
+        const deleteOper = this.repository
+          .deleteBy({
+            ...this.extraQuery(meta),
+          })
+          .then(() => {
+            meta._markAsDeleted = false;
+          });
+        opers.push(deleteOper);
+      });
+    }
+    return Promise.all(opers);
+  }
+
+  /**
+   * Saves the inserted metadata.
+   * @param {IMetadata[]} metadata -
+   * @returns {Promise}
+   */
+  saveInserted(metadata: IMetadata[]) {
+    const inserted = metadata.filter(
+      (m: IMetadata) => m._markAsInserted === true
+    );
+    const opers: Promise<void> = [];
+
+    inserted.forEach((meta) => {
+      const insertData = {
+        [this.KEY_COLUMN]: meta.key,
+        [this.VALUE_COLUMN]: meta.value,
+        ...this.transfromMetaExtraColumns(meta),
+      };
+      const insertOper = this.repository.create(insertData).then(() => {
+        meta._markAsInserted = false;
+      });
+      opers.push(insertOper);
+    });
+    return Promise.all(opers);
+  }
+
+  /**
+   * Loads the metadata from the storage.
+   * @param {String|Array} key -
+   * @param {Boolean} force -
+   */
+  async load() {
+    const metadata = await this.repository.all();
+    const mappedMetadata = this.mapMetadataCollection(metadata);
+
+    this.resetMetadata();
+
+    mappedMetadata.forEach((meta: IMetadata) => {
+      this.metadata.push(meta);
+    });
+    this.loaded = true;
+  }
+
+  /**
+   * Parse the metadata values after fetching it from the storage.
+   * @param {String|Number|Boolean} value -
+   * @param {String} valueType -
+   * @return {String|Number|Boolean} -
+   */
+  static parseMetaValue(
+    value: string,
+    valueType: string | false
+  ): string | boolean | number {
+    let parsedValue: string | number | boolean;
+
+    switch (valueType) {
+      case 'number':
+        parsedValue = parseFloat(value);
+        break;
+      case 'boolean':
+        parsedValue = parseBoolean(value, false);
+        break;
+      case 'json':
+        parsedValue = JSON.stringify(parsedValue);
+        break;
+      default:
+        parsedValue = value;
+        break;
+    }
+    return parsedValue;
+  }
+
+  /**
+   * Mapping and parse metadata to collection entries.
+   * @param {Meta} attr -
+   * @param {String} parseType -
+   */
+  mapMetadata(metadata: IMetadata) {
+    const metaType = this.config.getMetaType(
+      metadata[this.KEY_COLUMN],
+      metadata['group'],
+    );
+    return {
+      key: metadata[this.KEY_COLUMN],
+      value: MetableDBStore.parseMetaValue(
+        metadata[this.VALUE_COLUMN],
+        metaType
+      ),
+      ...this.extraColumns.reduce((obj, extraCol: string) => {
+        obj[extraCol] = metadata[extraCol] || null;
+        return obj;
+      }, {}),
+    };
+  }
+
+  /**
+   * Parse the metadata to the collection.
+   * @param {Array} collection -
+   */
+  mapMetadataCollection(metadata: IMetadata[]) {
+    return metadata.map((model) => this.mapMetadata(model));
+  }
+
+  /**
+   * Throw error in case the store is not loaded yet.
+   */
+  private validateStoreIsLoaded() {
+    if (!this.loaded) {
+      throw new Error(
+        'You could not save the store before loaded from the storage.'
+      );
+    }
+  }
+}
--- a/packages/server/src/lib/MomentFormats/index.ts
+++ b/packages/server/src/lib/MomentFormats/index.ts
@@ -0,0 +1,48 @@
+import moment from 'moment';
+
+moment.prototype.toMySqlDateTime = function () {
+  return this.format('YYYY-MM-DD HH:mm:ss');
+};
+
+// moment.fn.businessDiff = function (param) {
+//   param = moment(param);
+//   var signal = param.unix() < this.unix() ? 1 : -1;
+//   var start = moment.min(param, this).clone();
+//   var end = moment.max(param, this).clone();
+//   var start_offset = start.day() - 7;
+//   var end_offset = end.day();
+
+//   var end_sunday = end.clone().subtract('d', end_offset);
+//   var start_sunday = start.clone().subtract('d', start_offset);
+//   var weeks = end_sunday.diff(start_sunday, 'days') / 7;
+
+//   start_offset = Math.abs(start_offset);
+//   if (start_offset == 7)
+//     start_offset = 5;
+//   else if (start_offset == 1)
+//     start_offset = 0;
+//   else
+//     start_offset -= 2;
+
+//   if (end_offset == 6)
+//     end_offset--;
+
+//   return signal * (weeks * 5 + start_offset + end_offset);
+// };
+
+// moment.fn.businessAdd = function (days) {
+//   var signal = days < 0 ? -1 : 1;
+//   days = Math.abs(days);
+//   var d = this.clone().add(Math.floor(days / 5) * 7 * signal, 'd');
+//   var remaining = days % 5;
+//   while (remaining) {
+//     d.add(signal, 'd');
+//     if (d.day() !== 0 && d.day() !== 6)
+//       remaining--;
+//   }
+//   return d;
+// };
+
+// moment.fn.businessSubtract = function (days) {
+//   return this.businessAdd(-days);
+// };
--- a/packages/server/src/lib/NestedSet/NestedSetNode.js
+++ b/packages/server/src/lib/NestedSet/NestedSetNode.js
@@ -0,0 +1,9 @@
+
+
+class NestedSetNode {
+
+  // Saves
+  appendToNode($parent) {
+    
+  }
+}
--- a/packages/server/src/lib/QueryBuilderBulkOperations/QueryBuilder.js
+++ b/packages/server/src/lib/QueryBuilderBulkOperations/QueryBuilder.js
@@ -0,0 +1,27 @@
+import { QueryBuilder } from "knex"
+import { QueryBuilder } from 'objection';
+
+export default class BulkOperationsQueryBuilder extends QueryBuilder {
+
+  bulkInsert(collection) {
+    const opers = [];
+
+    collection.forEach((dataset) => {
+      const insertOper = this.insert({ ...dataset });
+      opers.push(insertOper);
+    });
+    return Promise.all(opers);
+  }
+
+  bulkDelete(rowsIds) {
+
+  }
+
+  bulkUpdate(dataset, whereColumn) {
+
+  }
+
+  bulkPatch(newDataset, oldDataset) {
+
+  }
+}
--- a/packages/server/src/lib/Seeder/FsMigrations.ts
+++ b/packages/server/src/lib/Seeder/FsMigrations.ts
@@ -0,0 +1,100 @@
+import path from 'path';
+import { sortBy } from 'lodash';
+import fs from 'fs';
+import { promisify } from 'util';
+import { MigrateItem } from './interfaces';
+import { importWebpackSeedModule } from './Utils';
+import { DEFAULT_LOAD_EXTENSIONS } from './constants';
+import { filterMigrations } from './MigrateUtils';
+
+const readdir = promisify(fs.readdir);
+
+class FsMigrations {
+  private sortDirsSeparately: boolean;
+  private migrationsPaths: string[];
+  private loadExtensions: string[];
+
+  /**
+   * Constructor method.
+   * @param migrationDirectories
+   * @param sortDirsSeparately
+   * @param loadExtensions
+   */
+  constructor(
+    migrationDirectories: string[],
+    sortDirsSeparately: boolean,
+    loadExtensions: string[]
+  ) {
+    this.sortDirsSeparately = sortDirsSeparately;
+
+    if (!Array.isArray(migrationDirectories)) {
+      migrationDirectories = [migrationDirectories];
+    }
+    this.migrationsPaths = migrationDirectories;
+    this.loadExtensions = loadExtensions || DEFAULT_LOAD_EXTENSIONS;
+  }
+
+  /**
+   * Gets the migration names
+   * @returns Promise<MigrateItem[]>
+   */
+  public getMigrations(loadExtensions = null): Promise<MigrateItem[]> {
+    // Get a list of files in all specified migration directories
+    const readMigrationsPromises = this.migrationsPaths.map((configDir) => {
+      const absoluteDir = path.resolve(process.cwd(), configDir);
+      return readdir(absoluteDir).then((files) => ({
+        files,
+        configDir,
+        absoluteDir,
+      }));
+    });
+
+    return Promise.all(readMigrationsPromises).then((allMigrations) => {
+      const migrations = allMigrations.reduce((acc, migrationDirectory) => {
+        // When true, files inside the folder should be sorted
+        if (this.sortDirsSeparately) {
+          migrationDirectory.files = migrationDirectory.files.sort();
+        }
+        migrationDirectory.files.forEach((file) =>
+          acc.push({ file, directory: migrationDirectory.configDir })
+        );
+        return acc;
+      }, []);
+
+      // If true we have already sorted the migrations inside the folders
+      // return the migrations fully qualified
+      if (this.sortDirsSeparately) {
+        return filterMigrations(
+          this,
+          migrations,
+          loadExtensions || this.loadExtensions
+        );
+      }
+      return filterMigrations(
+        this,
+        sortBy(migrations, 'file'),
+        loadExtensions || this.loadExtensions
+      );
+    });
+  }
+
+  /**
+   * Retrieve the file name from given migrate item.
+   * @param {MigrateItem} migration
+   * @returns {string}
+   */
+  public getMigrationName(migration: MigrateItem): string {
+    return migration.file;
+  }
+
+  /**
+   * Retrieve the migrate file content from given migrate item.
+   * @param {MigrateItem} migration
+   * @returns {string}
+   */
+  public getMigration(migration: MigrateItem): string {
+    return importWebpackSeedModule(migration.file);
+  }
+}
+
+export { DEFAULT_LOAD_EXTENSIONS, FsMigrations };
--- a/packages/server/src/lib/Seeder/MigrateUtils.ts
+++ b/packages/server/src/lib/Seeder/MigrateUtils.ts
@@ -0,0 +1,192 @@
+import { differenceWith } from 'lodash';
+import path from 'path';
+import { FsMigrations } from './FsMigrations';
+import {
+  getTable,
+  getTableName,
+  getLockTableName,
+  getLockTableNameWithSchema,
+} from './TableUtils';
+import { ISeederConfig, MigrateItem } from './interfaces';
+
+/**
+ * Get schema-aware schema builder for a given schema nam
+ * @param trxOrKnex
+ * @param {string} schemaName
+ * @returns
+ */
+function getSchemaBuilder(trxOrKnex, schemaName: string | null = null) {
+  return schemaName
+    ? trxOrKnex.schema.withSchema(schemaName)
+    : trxOrKnex.schema;
+}
+
+/**
+ * Creates migration table of the given table name.
+ * @param {string} tableName
+ * @param {string} schemaName
+ * @param trxOrKnex
+ * @returns
+ */
+function createMigrationTable(
+  tableName: string,
+  schemaName: string,
+  trxOrKnex
+) {
+  return getSchemaBuilder(trxOrKnex, schemaName).createTable(
+    getTableName(tableName),
+    (t) => {
+      t.increments();
+      t.string('name');
+      t.integer('batch');
+      t.timestamp('migration_time');
+    }
+  );
+}
+
+/**
+ * Creates a migration lock table of the given table name.
+ * @param {string} tableName
+ * @param {string} schemaName
+ * @param trxOrKnex
+ * @returns
+ */
+function createMigrationLockTable(
+  tableName: string,
+  schemaName: string,
+  trxOrKnex
+) {
+  return getSchemaBuilder(trxOrKnex, schemaName).createTable(tableName, (t) => {
+    t.increments('index').primary();
+    t.integer('is_locked');
+  });
+}
+
+/**
+ *
+ * @param tableName
+ * @param schemaName
+ * @param trxOrKnex
+ * @returns
+ */
+export function ensureMigrationTables(
+  tableName: string,
+  schemaName: string,
+  trxOrKnex
+) {
+  const lockTable = getLockTableName(tableName);
+  const lockTableWithSchema = getLockTableNameWithSchema(tableName, schemaName);
+
+  return getSchemaBuilder(trxOrKnex, schemaName)
+    .hasTable(tableName)
+    .then((exists) => {
+      return !exists && createMigrationTable(tableName, schemaName, trxOrKnex);
+    })
+    .then(() => {
+      return getSchemaBuilder(trxOrKnex, schemaName).hasTable(lockTable);
+    })
+    .then((exists) => {
+      return (
+        !exists && createMigrationLockTable(lockTable, schemaName, trxOrKnex)
+      );
+    })
+    .then(() => {
+      return getTable(trxOrKnex, lockTable, schemaName).select('*');
+    })
+    .then((data) => {
+      return (
+        !data.length &&
+        trxOrKnex.into(lockTableWithSchema).insert({ is_locked: 0 })
+      );
+    });
+}
+
+/**
+ * Lists all available migration versions, as a sorted array.
+ * @param migrationSource
+ * @param loadExtensions
+ * @returns
+ */
+function listAll(
+  migrationSource: FsMigrations,
+  loadExtensions
+): Promise<MigrateItem[]> {
+  return migrationSource.getMigrations(loadExtensions);
+}
+
+/**
+ * Lists all migrations that have been completed for the current db, as an array.
+ * @param {string} tableName
+ * @param {string} schemaName
+ * @param {} trxOrKnex
+ * @returns Promise<string[]>
+ */
+export async function listCompleted(
+  tableName: string,
+  schemaName: string,
+  trxOrKnex
+): Promise<string[]> {
+  const completedMigrations = await trxOrKnex
+    .from(getTableName(tableName, schemaName))
+    .orderBy('id')
+    .select('name');
+
+  return completedMigrations.map((migration) => {
+    return migration.name;
+  });
+}
+
+/**
+ * Gets the migration list from the migration directory specified in config, as well as
+ * the list of completed migrations to check what should be run.
+ */
+export function listAllAndCompleted(config: ISeederConfig, trxOrKnex) {
+  return Promise.all([
+    listAll(config.migrationSource, config.loadExtensions),
+    listCompleted(config.tableName, config.schemaName, trxOrKnex),
+  ]);
+}
+
+/**
+ *
+ * @param migrationSource
+ * @param all
+ * @param completed
+ * @returns
+ */
+export function getNewMigrations(
+  migrationSource: FsMigrations,
+  all: MigrateItem[],
+  completed: string[]
+): MigrateItem[] {
+  return differenceWith(all, completed, (allMigration, completedMigration) => {
+    return (
+      completedMigration === migrationSource.getMigrationName(allMigration)
+    );
+  });
+}
+
+function startsWithNumber(str) {
+  return /^\d/.test(str);
+}
+/**
+ *
+ * @param {FsMigrations} migrationSource -
+ * @param {MigrateItem[]} migrations -
+ * @param {string[]} loadExtensions -
+ * @returns
+ */
+export function filterMigrations(
+  migrationSource: FsMigrations,
+  migrations: MigrateItem[],
+  loadExtensions: string[]
+) {
+  return migrations.filter((migration) => {
+    const migrationName = migrationSource.getMigrationName(migration);
+    const extension = path.extname(migrationName);
+
+    return (
+      loadExtensions.includes(extension) && startsWithNumber(migrationName)
+    );
+  });
+}
--- a/packages/server/src/lib/Seeder/SeedMigration.ts
+++ b/packages/server/src/lib/Seeder/SeedMigration.ts
@@ -0,0 +1,222 @@
+import { Knex } from 'knex';
+import Bluebird from 'bluebird';
+import { getTable, getTableName, getLockTableName } from './TableUtils';
+import getMergedConfig from './SeederConfig';
+import {
+  listAllAndCompleted,
+  getNewMigrations,
+  listCompleted,
+  ensureMigrationTables,
+} from './MigrateUtils';
+import { MigrateItem, SeedMigrationContext, ISeederConfig } from './interfaces';
+import { FsMigrations } from './FsMigrations';
+
+export class SeedMigration {
+  knex: Knex;
+  config: ISeederConfig;
+  migrationSource: FsMigrations;
+  context: SeedMigrationContext;
+
+  /**
+   * Constructor method.
+   * @param {Knex} knex - Knex instance.
+   * @param {SeedMigrationContext} context -
+   */
+  constructor(knex: Knex, context: SeedMigrationContext) {
+    this.knex = knex;
+    this.config = getMergedConfig(this.knex.client.config.seeds, undefined);
+    this.migrationSource = this.config.migrationSource;
+    this.context = context;
+  }
+
+  /**
+   * Latest migration.
+   * @returns {Promise<void>}
+   */
+  async latest(config = null): Promise<void> {
+    // Merges the configuration.
+    this.config = getMergedConfig(config, this.config);
+
+    // Ensure migration tables.
+    await ensureMigrationTables(this.config.tableName, null, this.knex);
+
+    // Retrieve all and completed migrations.
+    const [all, completed] = await listAllAndCompleted(this.config, this.knex);
+
+    // Retrieve the new migrations.
+    const migrations = getNewMigrations(this.migrationSource, all, completed);
+
+    // Run the latest migration on one batch.
+    return this.knex.transaction((trx: Knex.Transaction) => {
+      return this.runBatch(migrations, 'up', trx);
+    });
+  }
+
+  /**
+   * Add migration lock flag.
+   * @param {Knex.Transaction} trx
+   * @returns
+   */
+  private migrateLockTable(trx: Knex.Transaction) {
+    const tableName = getLockTableName(this.config.tableName);
+    return getTable(this.knex, tableName, this.config.schemaName)
+      .transacting(trx)
+      .where('is_locked', '=', 0)
+      .update({ is_locked: 1 })
+      .then((rowCount) => {
+        if (rowCount != 1) {
+          throw new Error('Migration table is already locked');
+        }
+      });
+  }
+
+  /**
+   * Add migration lock flag.
+   * @param {Knex.Transaction} trx
+   * @returns
+   */
+  private migrationLock(trx: Knex.Transaction) {
+    return this.migrateLockTable(trx);
+  }
+
+  /**
+   * Free the migration lock flag.
+   * @param {Knex.Transaction} trx
+   * @returns
+   */
+  private freeLock(trx = this.knex): Promise<void> {
+    const tableName = getLockTableName(this.config.tableName);
+
+    return getTable(trx, tableName, this.config.schemaName).update({
+      is_locked: 0,
+    });
+  }
+
+  /**
+   * Returns the latest batch number.
+   * @param trx
+   * @returns
+   */
+  private latestBatchNumber(trx = this.knex): number {
+    return trx
+      .from(getTableName(this.config.tableName, this.config.schemaName))
+      .max('batch as max_batch')
+      .then((obj) => obj[0].max_batch || 0);
+  }
+
+  /**
+   * Runs a batch of `migrations` in a specified `direction`, saving the
+   * appropriate database information as the migrations are run.
+   * @param   {number} batchNo
+   * @param   {MigrateItem[]} migrations
+   * @param   {string} direction
+   * @param   {Knex.Transaction} trx
+   * @returns {Promise<void>}
+   */
+  private waterfallBatch(
+    batchNo: number,
+    migrations: MigrateItem[],
+    direction: string,
+    trx: Knex.Transaction
+  ): Promise<void> {
+    const { tableName } = this.config;
+
+    return Bluebird.each(migrations, (migration) => {
+      const name = this.migrationSource.getMigrationName(migration);
+
+      return this.migrationSource
+        .getMigration(migration)
+        .then((migrationContent) =>
+          this.runMigrationContent(migrationContent.default, direction, trx)
+        )
+        .then(() => {
+          if (direction === 'up') {
+            return trx.into(getTableName(tableName)).insert({
+              name,
+              batch: batchNo,
+              migration_time: new Date(),
+            });
+          }
+          if (direction === 'down') {
+            return trx.from(getTableName(tableName)).where({ name }).del();
+          }
+        });
+    });
+  }
+
+  /**
+   * Runs and builds the given migration class.
+   */
+  private runMigrationContent(Migration, direction, trx) {
+    const instance = new Migration(trx);
+
+    if (this.context.i18n) {
+      instance.setI18n(this.context.i18n);
+    }
+    instance.setTenant(this.context.tenant);
+
+    return instance[direction](trx);
+  }
+
+  /**
+   * Validates some migrations by requiring and checking for an `up` and `down`function.
+   * @param {MigrateItem} migration
+   * @returns {MigrateItem}
+   */
+  async validateMigrationStructure(migration: MigrateItem): MigrateItem {
+    const migrationName = this.migrationSource.getMigrationName(migration);
+
+    // maybe promise
+    const migrationContent = await this.migrationSource.getMigration(migration);
+    if (
+      typeof migrationContent.up !== 'function' ||
+      typeof migrationContent.down !== 'function'
+    ) {
+      throw new Error(
+        `Invalid migration: ${migrationName} must have both an up and down function`
+      );
+    }
+    return migration;
+  }
+
+  /**
+   * Run a batch of current migrations, in sequence.
+   * @param   {MigrateItem[]} migrations
+   * @param   {string} direction
+   * @param   {Knex.Transaction} trx
+   * @returns {Promise<void>}
+   */
+  private async runBatch(
+    migrations: MigrateItem[],
+    direction: string,
+    trx: Knex.Transaction
+  ): Promise<void> {
+    // Adds flag to migration lock.
+    await this.migrationLock(trx);
+
+    // When there is a wrapping transaction, some migrations
+    // could have been done while waiting for the lock:
+    const completed = await listCompleted(
+      this.config.tableName,
+      this.config.schemaName,
+      trx
+    );
+    // Differentiate between all and completed to get new migrations.
+    const newMigrations = getNewMigrations(
+      this.config.migrationSource,
+      migrations,
+      completed
+    );
+    // Retrieve the latest batch number.
+    const batchNo = await this.latestBatchNumber(trx);
+
+    // Increment the next batch number.
+    const newBatchNo = direction === 'up' ? batchNo + 1 : batchNo;
+
+    // Run all migration files in waterfall.
+    await this.waterfallBatch(newBatchNo, newMigrations, direction, trx);
+
+    // Free the migration lock flag.
+    await this.freeLock(trx);
+  }
+}
--- a/packages/server/src/lib/Seeder/Seeder.ts
+++ b/packages/server/src/lib/Seeder/Seeder.ts
@@ -0,0 +1,11 @@
+
+export class Seeder {
+  knex: any;
+
+  constructor(knex) {
+    this.knex = knex;
+  }
+  up(knex) {}
+  down(knex) {}
+}
+
--- a/packages/server/src/lib/Seeder/SeederConfig.ts
+++ b/packages/server/src/lib/Seeder/SeederConfig.ts
@@ -0,0 +1,44 @@
+import { DEFAULT_LOAD_EXTENSIONS, FsMigrations } from './FsMigrations';
+
+const CONFIG_DEFAULT = Object.freeze({
+  extension: 'js',
+  loadExtensions: DEFAULT_LOAD_EXTENSIONS,
+  tableName: 'knex_migrations',
+  schemaName: null,
+  directory: './migrations',
+  disableTransactions: false,
+  disableMigrationsListValidation: false,
+  sortDirsSeparately: false,
+});
+
+export default function getMergedConfig(config, currentConfig) {
+  // config is the user specified config, mergedConfig has defaults and current config
+  // applied to it.
+  const mergedConfig = {
+    ...CONFIG_DEFAULT,
+    ...(currentConfig || {}),
+    ...config,
+  };
+
+  if (
+    config &&
+    // If user specifies any FS related config,
+    // clear specified migrationSource to avoid ambiguity
+    (config.directory ||
+      config.sortDirsSeparately !== undefined ||
+      config.loadExtensions)
+  ) {
+    mergedConfig.migrationSource = null;
+  }
+
+  // If the user has not specified any configs, we need to
+  // default to fs migrations to maintain compatibility
+  if (!mergedConfig.migrationSource) {
+    mergedConfig.migrationSource = new FsMigrations(
+      mergedConfig.directory,
+      mergedConfig.sortDirsSeparately,
+      mergedConfig.loadExtensions
+    );
+  }
+  return mergedConfig;
+}
--- a/packages/server/src/lib/Seeder/TableUtils.ts
+++ b/packages/server/src/lib/Seeder/TableUtils.ts
@@ -0,0 +1,43 @@
+/**
+ * Get schema-aware query builder for a given table and schema name.
+ * @param {Knex} trxOrKnex -
+ * @param {string} tableName -
+ * @param {string} schemaName -
+ * @returns {string}
+ */
+export function getTable(trx, tableName: string, schemaName = null) {
+  return schemaName ? trx(tableName).withSchema(schemaName) : trx(tableName);
+}
+
+/**
+ * Get schema-aware table name.
+ * @param {string} tableName -
+ * @returns {string}
+ */
+export function getTableName(tableName: string, schemaName = null): string {
+  return schemaName ? `${schemaName}.${tableName}` : tableName;
+}
+
+/**
+ * Retrieve the lock table name from given migration table name.
+ * @param {string} tableName
+ * @returns {string}
+ */
+export function getLockTableName(tableName: string): string {
+  return `${tableName}_lock`;
+}
+
+/**
+ * Retireve the lock table name from ginve migration table name with schema.
+ * @param {string} tableName
+ * @param {string} schemaName
+ * @returns {string}
+ */
+export function getLockTableNameWithSchema(
+  tableName: string,
+  schemaName = null
+): string {
+  return schemaName
+    ? `${schemaName} + ${getLockTableName(tableName)}`
+    : getLockTableName(tableName);
+}
--- a/packages/server/src/lib/Seeder/TenantSeeder.ts
+++ b/packages/server/src/lib/Seeder/TenantSeeder.ts
@@ -0,0 +1,25 @@
+import { Seeder } from "./Seeder";
+
+export class TenantSeeder extends Seeder{
+  public knex: any;
+  public i18n: i18nAPI;
+  public models: any;
+  public tenant: any;
+
+  constructor(knex) {
+    super(knex);
+    this.knex = knex;
+  }
+
+  setI18n(i18n) {
+    this.i18n = i18n;
+  }
+
+  setModels(models) {
+    this.models = models;
+  }
+
+  setTenant(tenant) {
+    this.tenant = tenant;
+  }
+}
--- a/packages/server/src/lib/Seeder/Utils.ts
+++ b/packages/server/src/lib/Seeder/Utils.ts
@@ -0,0 +1,42 @@
+import fs from 'fs';
+
+const { promisify } = require('util');
+const readFile = promisify(fs.readFile);
+
+/**
+ * Detarmines the module type of the given file path.
+ * @param {string} filepath
+ * @returns {boolean}
+ */
+async function isModuleType(filepath: string): boolean {
+  if (process.env.npm_package_json) {
+    // npm >= 7.0.0
+    const packageJson = JSON.parse(
+      await readFile(process.env.npm_package_json, 'utf-8')
+    );
+    if (packageJson.type === 'module') {
+      return true;
+    }
+  }
+  return process.env.npm_package_type === 'module' || filepath.endsWith('.mjs');
+}
+
+/**
+ * Imports content of the given file path.
+ * @param {string} filepath
+ * @returns
+ */
+export async function importFile(filepath: string): any {
+  return (await isModuleType(filepath))
+    ? import(require('url').pathToFileURL(filepath))
+    : require(filepath);
+}
+
+/**
+ *
+ * @param {string} moduleName
+ * @returns
+ */
+export async function importWebpackSeedModule(moduleName: string): any {
+  return import(`@/database/seeds/core/${moduleName}`);
+}
--- a/packages/server/src/lib/Seeder/constants.ts
+++ b/packages/server/src/lib/Seeder/constants.ts
@@ -0,0 +1,12 @@
+// Default load extensions.
+export const DEFAULT_LOAD_EXTENSIONS = [
+  '.co',
+  '.coffee',
+  '.eg',
+  '.iced',
+  '.js',
+  '.cjs',
+  '.litcoffee',
+  '.ls',
+  '.ts',
+];
--- a/packages/server/src/lib/Seeder/interfaces.ts
+++ b/packages/server/src/lib/Seeder/interfaces.ts
@@ -0,0 +1,20 @@
+import { ITenant } from "interfaces";
+
+export interface FsMigrations {}
+
+export interface ISeederConfig {
+  tableName: string;
+  migrationSource: FsMigrations;
+  schemaName?: string;
+  loadExtensions: string[];
+}
+
+export interface MigrateItem {
+  file: string;
+  directory: string;
+}
+
+export interface SeedMigrationContext {
+  i18n: i18nAPI;
+  tenant: ITenant;
+}
--- a/packages/server/src/lib/Transformer/Transformer.ts
+++ b/packages/server/src/lib/Transformer/Transformer.ts
@@ -0,0 +1,197 @@
+import moment from 'moment';
+import * as R from 'ramda';
+import { includes, isFunction, isObject, isUndefined, omit } from 'lodash';
+import { formatNumber } from 'utils';
+
+export class Transformer {
+  public context: any;
+  public options: Record<string, any>;
+
+  /**
+   * Includeded attributes.
+   * @returns {string[]}
+   */
+  public includeAttributes = (): string[] => {
+    return [];
+  };
+
+  /**
+   * Exclude attributes.
+   * @returns {string[]}
+   */
+  public excludeAttributes = (): string[] => {
+    return [];
+  };
+
+  /**
+   * Detarmines whether to exclude all attributes except the include attributes.
+   * @returns {boolean}
+   */
+  public isExcludeAllAttributes = () => {
+    return includes(this.excludeAttributes(), '*');
+  };
+
+  /**
+   *
+   * @param object
+   */
+  transform = (object: any) => {
+    return object;
+  };
+
+  /**
+   *
+   */
+  public work = (object: any) => {
+    if (Array.isArray(object)) {
+      return object.map(this.getTransformation);
+    } else if (isObject(object)) {
+      return this.getTransformation(object);
+    }
+    return object;
+  };
+
+  /**
+   * Transformes the given item to desired output.
+   * @param item
+   * @returns
+   */
+  protected getTransformation = (item) => {
+    const normlizedItem = this.normalizeModelItem(item);
+
+    return R.compose(
+      this.transform,
+      R.when(this.hasExcludeAttributes, this.excludeAttributesTransformed),
+      this.includeAttributesTransformed
+    )(normlizedItem);
+  };
+
+  /**
+   *
+   * @param item
+   * @returns
+   */
+  protected normalizeModelItem = (item) => {
+    return !isUndefined(item.toJSON) ? item.toJSON() : item;
+  };
+
+  /**
+   * Exclude attributes from the given item.
+   */
+  protected excludeAttributesTransformed = (item) => {
+    const exclude = this.excludeAttributes();
+
+    return omit(item, exclude);
+  };
+
+  /**
+   * Incldues virtual attributes.
+   */
+  protected getIncludeAttributesTransformed = (item) => {
+    const attributes = this.includeAttributes();
+
+    return attributes
+      .filter(
+        (attribute) =>
+          isFunction(this[attribute]) || !isUndefined(item[attribute])
+      )
+      .reduce((acc, attribute: string) => {
+        acc[attribute] = isFunction(this[attribute])
+          ? this[attribute](item)
+          : item[attribute];
+
+        return acc;
+      }, {});
+  };
+
+  /**
+   *
+   * @param item
+   * @returns
+   */
+  protected includeAttributesTransformed = (item) => {
+    const excludeAll = this.isExcludeAllAttributes();
+    const virtualAttrs = this.getIncludeAttributesTransformed(item);
+
+    return {
+      ...(!excludeAll ? item : {}),
+      ...virtualAttrs,
+    };
+  };
+
+  /**
+   *
+   * @returns
+   */
+  private hasExcludeAttributes = () => {
+    return this.excludeAttributes().length > 0;
+  };
+
+  /**
+   *
+   * @param date
+   * @returns
+   */
+  protected formatDate(date) {
+    return date ? moment(date).format('YYYY/MM/DD') : '';
+  }
+
+  /**
+   *
+   * @param number
+   * @returns
+   */
+  protected formatNumber(number) {
+    return formatNumber(number, { money: false });
+  }
+
+  /**
+   *
+   * @param money
+   * @param options
+   * @returns
+   */
+  protected formatMoney(money, options?) {
+    return formatNumber(money, {
+      currencyCode: this.context.organization.baseCurrency,
+      ...options,
+    });
+  }
+
+  /**
+   *
+   * @param obj
+   * @param transformer
+   * @param options
+   */
+  public item(
+    obj: Record<string, any>,
+    transformer: Transformer,
+    options?: any
+  ) {
+    transformer.setOptions(options);
+    transformer.setContext(this.context);
+
+    return transformer.work(obj);
+  }
+
+  /**
+   * Sets custom options to the application.
+   * @param   {} options
+   * @returns {Transformer}
+   */
+  public setOptions(options) {
+    this.options = options;
+    return this;
+  }
+
+  /**
+   * Sets the application context to the application.
+   * @param   {} context
+   * @returns {Transformer}
+   */
+  public setContext(context) {
+    this.context = context;
+    return this;
+  }
+}
--- a/packages/server/src/lib/Transformer/TransformerInjectable.ts
+++ b/packages/server/src/lib/Transformer/TransformerInjectable.ts
@@ -0,0 +1,49 @@
+import { Service, Inject } from 'typedi';
+import { isNull } from 'lodash';
+import HasTenancyService from '@/services/Tenancy/TenancyService';
+import { TenantMetadata } from '@/system/models';
+import { Transformer } from './Transformer';
+
+@Service()
+export class TransformerInjectable {
+  @Inject()
+  private tenancy: HasTenancyService;
+
+  /**
+   * Retrieves the application context of all tenant transformers.
+   * @param   {number} tenantId
+   * @returns {}
+   */
+  async getApplicationContext(tenantId: number) {
+    const i18n = this.tenancy.i18n(tenantId);
+    const organization = await TenantMetadata.query().findOne({ tenantId });
+
+    return {
+      organization,
+      i18n,
+    };
+  }
+
+  /**
+   * Transformes the given transformer after inject the tenant context.
+   * @param   {number} tenantId
+   * @param   {Record<string, any> | Record<string, any>[]} object
+   * @param   {Transformer} transformer
+   * @param   {Record<string, any>} options
+   * @returns {Record<string, any>}
+   */
+  async transform(
+    tenantId: number,
+    object: Record<string, any> | Record<string, any>[],
+    transformer: Transformer,
+    options?: Record<string, any>
+  ) {
+    if (!isNull(tenantId)) {
+      const context = await this.getApplicationContext(tenantId);
+      transformer.setContext(context);
+    }
+    transformer.setOptions(options);
+
+    return transformer.work(object);
+  }
+}
--- a/packages/server/src/lib/ViewRolesBuilder/FilterRolesDynamicFilter.js
+++ b/packages/server/src/lib/ViewRolesBuilder/FilterRolesDynamicFilter.js
@@ -0,0 +1,44 @@
+import DynamicFilterRoleAbstructor from '@/lib/DynamicFilter/DynamicFilterRoleAbstructor';
+import {
+  validateViewRoles,
+  buildFilterQuery,
+} from '@/lib/ViewRolesBuilder';
+
+export default class ViewRolesDynamicFilter extends DynamicFilterRoleAbstructor {
+  /**
+   * Constructor method.
+   * @param {*} filterRoles -
+   * @param {*} logicExpression -
+   */
+  constructor(filterRoles, logicExpression) {
+    super();
+
+    this.filterRoles = filterRoles;
+    this.logicExpression = logicExpression;
+
+    this.tableName = '';
+  }
+
+  /**
+   * Retrieve logic expression.
+   */
+  buildLogicExpression() {
+    return this.logicExpression;
+  }
+
+  /**
+   * Validates filter roles.
+   */
+  validateFilterRoles() {
+    return validateViewRoles(this.filterRoles, this.logicExpression);
+  }
+
+  /**
+   * Builds database query of view roles.
+   */
+  buildQuery() {
+    return (builder) => {
+      buildFilterQuery(this.tableName, this.filterRoles, this.logicExpression)(builder);
+    };
+  }
+}
--- a/packages/server/src/lib/ViewRolesBuilder/index.ts
+++ b/packages/server/src/lib/ViewRolesBuilder/index.ts
@@ -0,0 +1,129 @@
+import { difference } from 'lodash';
+
+import { IFilterRole, IModel } from '@/interfaces';
+
+/**
+ * Get field column metadata and its relation with other tables.
+ * @param {String} tableName - Table name of target column.
+ * @param {String} fieldKey - Target column key that stored in resource field.
+ */
+export function getRoleFieldColumn(model: IModel, fieldKey: string) {
+  const tableFields = model.fields;
+  return tableFields[fieldKey] ? tableFields[fieldKey] : null;
+}
+
+export function buildSortColumnJoin(model: IModel, sortColumnKey: string) {
+  return (builder) => {
+    const fieldColumn = getRoleFieldColumn(model, sortColumnKey);
+
+    if (fieldColumn.relation) {
+      const joinTable = getTableFromRelationColumn(fieldColumn.relation);
+      builder.join(
+        joinTable,
+        `${model.tableName}.${fieldColumn.column}`,
+        '=',
+        fieldColumn.relation
+      );
+    }
+  };
+}
+
+/**
+ * Mapes the view roles to view conditionals.
+ * @param {Array} viewRoles -
+ * @return {Array}
+ */
+export function mapViewRolesToConditionals(viewRoles) {
+  return viewRoles.map((viewRole) => ({
+    comparator: viewRole.comparator,
+    value: viewRole.value,
+    index: viewRole.index,
+
+    columnKey: viewRole.field.key,
+    slug: viewRole.field.slug,
+  }));
+}
+
+export function mapFilterRolesToDynamicFilter(roles) {
+  return roles.map((role) => ({
+    ...role,
+    columnKey: role.fieldKey,
+  }));
+}
+
+/**
+ * Builds sort column query.
+ * @param {String} tableName -
+ * @param {String} columnKey -
+ * @param {String} sortDirection -
+ */
+export function buildSortColumnQuery(
+  model: IModel,
+  columnKey: string,
+  sortDirection: string
+) {
+  const fieldRelation = getRoleFieldColumn(model, columnKey);
+  const sortColumn =
+    fieldRelation.relation || `${model.tableName}.${fieldRelation.column}`;
+
+  return (builder) => {
+    builder.orderBy(sortColumn, sortDirection);
+    buildSortColumnJoin(model, columnKey)(builder);
+  };
+}
+
+export function validateFilterLogicExpression(
+  logicExpression: string,
+  indexes
+) {
+  const logicExpIndexes = logicExpression.match(/\d+/g) || [];
+  const diff = difference(logicExpIndexes.map(Number), indexes);
+
+  return diff.length > 0 ? false : true;
+}
+
+export function validateRolesLogicExpression(
+  logicExpression: string,
+  roles: IFilterRole[]
+) {
+  return validateFilterLogicExpression(
+    logicExpression,
+    roles.map((r) => r.index)
+  );
+}
+
+export function validateFieldKeyExistance(model: any, fieldKey: string) {
+  return model?.fields?.[fieldKey] || false;
+}
+
+
+/**
+ * Retrieve model fields keys.
+ * @param {IModel} Model
+ * @return {string[]}
+ */
+export function getModelFieldsKeys(Model: IModel) {
+  const fields = Object.keys(Model.fields);
+
+  return fields.sort((a, b) => {
+    if (a < b) {
+      return -1;
+    }
+    if (a > b) {
+      return 1;
+    }
+    return 0;
+  });
+}
+
+export function getModelFields(Model: IModel) {
+  const fieldsKey = this.getModelFieldsKeys(Model);
+
+  return fieldsKey.map((fieldKey) => {
+    const field = Model.fields[fieldKey];
+    return {
+      ...field,
+      key: fieldKey,
+    };
+  });
+}