feat: export resource data to csv, xlsx

packages/server/src/services/Export/ExportApplication.ts

@@ -0,0 +1,17 @@
+import { Inject, Service } from 'typedi';
+import { ExportResourceService } from './ExportService';
+
+@Service()
+export class ExportApplication {
+  @Inject()
+  private exportResource: ExportResourceService;
+
+  /**
+   * Exports the given resource to csv, xlsx or pdf format.
+   * @param {string} reosurce
+   * @param {string} format
+   */
+  public export(tenantId: number, resource: string, format: string) {
+    return this.exportResource.export(tenantId, resource, format);
+  }
+}

packages/server/src/services/Export/ExportRegistery.ts

@@ -0,0 +1,49 @@
+import { camelCase, upperFirst } from 'lodash';
+import { Exportable } from './Exportable';
+
+export class ExportableRegistry {
+  private static instance: ExportableRegistry;
+  private exportables: Record<string, Exportable>;
+
+  /**
+   * Constructor method.
+   */
+  constructor() {
+    this.exportables = {};
+  }
+
+  /**
+   * Gets singleton instance of registry.
+   * @returns {ExportableRegistry}
+   */
+  public static getInstance(): ExportableRegistry {
+    if (!ExportableRegistry.instance) {
+      ExportableRegistry.instance = new ExportableRegistry();
+    }
+    return ExportableRegistry.instance;
+  }
+
+  /**
+   * Registers the given importable service.
+   * @param {string} resource
+   * @param {Exportable} importable
+   */
+  public registerExportable(resource: string, importable: Exportable): void {
+    const _resource = this.sanitizeResourceName(resource);
+    this.exportables[_resource] = importable;
+  }
+
+  /**
+   * Retrieves the importable service instance of the given resource name.
+   * @param {string} name
+   * @returns {Exportable}
+   */
+  public getExportable(name: string): Exportable {
+    const _name = this.sanitizeResourceName(name);
+    return this.exportables[_name];
+  }
+
+  private sanitizeResourceName(resource: string) {
+    return upperFirst(camelCase(resource));
+  }
+}

packages/server/src/services/Export/ExportResources.ts

@@ -0,0 +1,44 @@
+import Container, { Service } from 'typedi';
+import { AccountsExportable } from '../Accounts/AccountsExportable';
+import { ExportableRegistry } from './ExportRegistery';
+import { ItemsImportable } from '../Items/ItemsImportable';
+import { ItemsExportable } from '../Items/ItemsExportable';
+
+@Service()
+export class ExportableResources {
+  private static registry: ExportableRegistry;
+
+  constructor() {
+    this.boot();
+  }
+
+  /**
+   * Importable instances.
+   */
+  private importables = [
+    { resource: 'Account', exportable: AccountsExportable },
+    { resource: 'Item', exportable: ItemsExportable },
+  ];
+
+  /**
+   *
+   */
+  public get registry() {
+    return ExportableResources.registry;
+  }
+
+  /**
+   * Boots all the registered importables.
+   */
+  public boot() {
+    if (!ExportableResources.registry) {
+      const instance = ExportableRegistry.getInstance();
+
+      this.importables.forEach((importable) => {
+        const importableInstance = Container.get(importable.exportable);
+        instance.registerExportable(importable.resource, importableInstance);
+      });
+      ExportableResources.registry = instance;
+    }
+  }
+}

packages/server/src/services/Export/ExportService.ts

@@ -0,0 +1,59 @@
+import { Inject, Service } from 'typedi';
+import xlsx from 'xlsx';
+import { sanitizeResourceName } from '../Import/_utils';
+import ResourceService from '../Resource/ResourceService';
+import { ExportableResources } from './ExportResources';
+
+@Service()
+export class ExportResourceService {
+  @Inject()
+  private resourceService: ResourceService;
+
+  @Inject()
+  private exportableResources: ExportableResources;
+
+  /**
+   *
+   * @param {number} tenantId
+   * @param {string} resourceName
+   * @param {string} format
+   */
+  async export(tenantId: number, resourceName: string, format: string = 'csv') {
+    const resource = sanitizeResourceName(resourceName);
+    const resourceMeta = this.resourceService.getResourceMeta(
+      tenantId,
+      resource
+    );
+    const exportable =
+      this.exportableResources.registry.getExportable(resource);
+
+    const data = await exportable.exportable(tenantId, {});
+
+    const exportableColumns = [
+      {
+        label: 'Account Normal',
+        accessor: 'accountNormalFormatted',
+      },
+      {
+        label: 'Account Type',
+        accessor: 'accountTypeFormatted',
+      },
+    ];
+
+    const workbook = xlsx.utils.book_new();
+    const worksheetData = data.map((item) =>
+      exportableColumns.map((col) => item[col.accessor])
+    );
+    worksheetData.unshift(exportableColumns.map((col) => col.label)); // Add header row
+    const worksheet = xlsx.utils.aoa_to_sheet(worksheetData);
+    xlsx.utils.book_append_sheet(workbook, worksheet, 'Exported Data');
+
+    if (format.toLowerCase() === 'csv') {
+      // Convert to CSV using the xlsx package
+      return xlsx.write(workbook, { type: 'buffer', bookType: 'csv' });
+    } else if (format.toLowerCase() === 'xlsx') {
+      // Write to XLSX format
+      return xlsx.write(workbook, { type: 'buffer', bookType: 'xlsx' });
+    }
+  }
+}

packages/server/src/services/Export/Exportable.ts

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+export class Exportable {
+  /**
+   *
+   * @param tenantId
+   * @returns
+   */
+  public async exportable(
+    tenantId: number,
+    query: Record<string, any>
+  ): Promise<Array<Record<string, any>>> {
+    return [];
+  }
+
+  /**
+   *
+   * @param data
+   * @returns
+   */
+  public transform(data: Record<string, any>) {
+    return data;
+  }
+}