feat: seed customers and vendors views.

server/src/models/Customer.js

@@ -1,6 +1,7 @@
 import { Model } from 'objection';
 import TenantModel from 'models/TenantModel';
 import PaginationQueryBuilder from './Pagination';
+import QueryParser from 'lib/LogicEvaluation/QueryParser';
 
 class CustomerQueryBuilder extends PaginationQueryBuilder {
   constructor(...args) {
@@ -50,6 +51,45 @@ export default class Customer extends TenantModel {
     return this.openingBalance + this.balance;
   }
 
+  /**
+   * Model modifiers.
+   */
+  static get modifiers() {
+    return {
+      /**
+       * Filters the active customers.
+       */
+      active(query) {
+        query.where('active', 1);
+      },
+      /**
+       * Filters the inactive customers.
+       */
+      inactive(query) {
+        query.where('active', 0);
+      },
+      /**
+       * Filters the customers that have overdue invoices.
+       */
+      overdue(query) {
+        query.select(
+          '*',
+          Customer
+            .relatedQuery('overDueInvoices', query.knex())
+            .count()
+            .as('countOverdue'),
+        );
+        query.having('countOverdue', '>', 0);
+      },
+      /**
+       * Filters the unpaid customers.
+       */
+      unpaid(query) {
+        query.whereRaw('`BALANCE` + `OPENING_BALANCE` <> 0');
+      }
+    };
+  }
+
   /**
    * Relationship mapping.
    */
@@ -65,11 +105,48 @@ export default class Customer extends TenantModel {
           to: 'sales_invoices.customerId',
         },
       },
+
+      overDueInvoices: {
+        relation: Model.HasManyRelation,
+        modelClass: SaleInvoice.default,
+        join: {
+          from: 'contacts.id',
+          to: 'sales_invoices.customerId',
+        },
+        filter: (query) => {
+          query.modify('overdue');
+        }
+      }
     };
   }
 
   static get fields() {
     return {
+      status: {
+        label: 'Status',
+        options: [
+          { key: 'active', label: 'Active' },
+          { key: 'inactive', label: 'Inactive' },
+          { key: 'overdue', label: 'Overdue' },
+          { key: 'unpaid', label: 'Unpaid' },
+        ],
+        query: (query, role) => {
+          switch(role.value) {
+            case 'active':
+              query.modify('active');
+              break;
+            case 'inactive':
+              query.modify('inactive');
+              break;
+            case 'overdue':
+              query.modify('overdue');
+              break;
+            case 'unpaid':
+              query.modify('unpaid');
+              break;
+          }
+        },
+      },
       created_at: {
         column: 'created_at',
       }