refactoring: custom views service.

fix: constraints of delete item from storage.
fix: constraints of delete item category from storage.
fix: localize database seeds files.
fix: view meta data in accounts list response.

server/src/services/Resource/ResourceService.js

@@ -1,5 +0,0 @@
-
-
-export default class ResourceService {
-   
-}

server/src/services/Resource/ResourceService.ts

@@ -0,0 +1,78 @@
+import { Service, Inject } from 'typedi';
+import { camelCase, upperFirst } from 'lodash'
+import { IModel } from 'interfaces';
+import resourceFieldsKeys from 'data/ResourceFieldsKeys';
+import TenancyService from 'services/Tenancy/TenancyService';
+
+@Service()
+export default class ResourceService {
+  @Inject()
+  tenancy: TenancyService;
+
+  /**
+   * 
+   * @param {string} resourceName 
+   */
+  getResourceFieldsRelations(modelName: string) {
+    const fieldsRelations = resourceFieldsKeys[modelName];
+
+    if (!fieldsRelations) {
+      throw new Error('Fields relation not found in thte given resource model.');
+    }
+    return fieldsRelations;
+  }
+
+  /**
+   * Transform resource to model name.
+   * @param {string} resourceName 
+   */
+  private resourceToModelName(resourceName: string): string {
+    return upperFirst(camelCase(resourceName));
+  }
+
+  /**
+   * Retrieve model from resource name in specific tenant.
+   * @param {number} tenantId 
+   * @param {string} resourceName 
+   */
+  public getModel(tenantId: number, resourceName: string) {
+    const models = this.tenancy.models(tenantId);
+    const modelName = this.resourceToModelName(resourceName);
+
+    return models[modelName];
+  }
+ 
+  getModelFields(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;
+    });
+  }
+
+  /**
+   * 
+   * @param {string} resourceName 
+   */
+  getResourceFields(Model: IModel) {
+    console.log(Model);
+
+    if (Model.resourceable) {
+      return this.getModelFields(Model);
+    }
+    return [];
+  }
+
+  /**
+   * 
+   * @param {string} resourceName 
+   */
+  getResourceColumns(Model: IModel) {
+    if (Model.resourceable) {
+      return this.getModelFields(Model);
+    }
+    return [];
+  }
+}