@intzi1992/cdk-table-exporter
Version:
Abstract CdkTable Exporter
160 lines • 20.9 kB
JavaScript
import { Directive, EventEmitter, Input, Output } from '@angular/core';
import * as i0 from "@angular/core";
import * as i1 from "./services/service-locator.service";
import * as i2 from "./services/data-extractor.service";
/**
* Exporter class for CdkTable. Abstracts the varying behaviors among different CdkTable implementations.
*/
export class CdkTableExporter {
constructor(serviceLocator, dataExtractor, _cdkTable) {
this.serviceLocator = serviceLocator;
this.dataExtractor = dataExtractor;
this._cdkTable = _cdkTable;
this.exportCompleted = new EventEmitter();
this.exportStarted = new EventEmitter();
}
/**
* Triggers page event chain thus extracting and exporting all the rows in nativetables in pages
*/
exportTable(exportType, options) {
this.loadExporter(exportType);
this._options = options;
this.exportStarted.emit();
this._isIterating = true;
this._isExporting = true;
this._data = new Array();
this.extractTableHeader();
try {
this.exportWithPagination();
}
catch (notPaginated) {
this.exportSinglePage();
}
}
toggleRow(index) {
const paginatedRowIndex = this.getPaginatedRowIndex(index);
if (this.isToggleOn(paginatedRowIndex)) {
this.toggleOff(paginatedRowIndex);
}
else {
this.toggleOn(paginatedRowIndex);
}
}
/**
* This event will clear rows selection done using toggleRow functionality
*/
resetToggleRows() {
this._selectedRows = [];
}
toggleOn(index) {
this._selectedRows = [...(this._selectedRows || []), index];
}
toggleOff(index) {
this._selectedRows = this._selectedRows.filter(x => x !== index);
}
isToggleOn(index) {
return this._selectedRows?.includes(index);
}
loadExporter(exportType) {
this._exporterService = this.serviceLocator.getService(exportType, this.exporter);
}
exportWithPagination() {
this._initialPageIndex = this.getCurrentPageIndex();
this.initPageHandler();
this.goToPage(0);
}
exportSinglePage() {
this.extractDataOnCurrentPage();
this.extractTableFooter();
this.exportExtractedData();
}
extractDataOnCurrentPage() {
const rows = this.dataExtractor.extractRows(this._cdkTable, this.hiddenColumns);
this._data = this._data.concat(this.getSelectedRows(rows));
}
getSelectedRows(rows) {
if (this.isSelectiveExport()) {
return rows.filter((_, i) => this._selectedRows.includes(this.getPaginatedRowIndex(i)));
}
else {
return rows;
}
}
isSelectiveExport() {
return this._selectedRows && !this.isMasterToggleOff() && !this.isMasterToggleOn();
}
isMasterToggleOn() {
return this.compareSelectedRowCount(this.getTotalItemsCount());
}
isMasterToggleOff() {
return this.compareSelectedRowCount(0);
}
compareSelectedRowCount(rowCount) {
return !!(this._selectedRows.length === rowCount);
}
initPageHandler() {
if (!this._subscription) {
this._subscription = this.getPageChangeObservable()?.subscribe(() => {
setTimeout(() => {
if (this._isIterating) {
this.extractDataOnCurrentPage();
if (this.hasNextPage()) {
this.nextPage();
}
else {
this._isIterating = false;
this.goToPage(this._initialPageIndex);
}
}
else if (this._isExporting) {
this._isExporting = false;
this.extractTableFooter();
this.exportExtractedData();
}
});
});
}
}
exportExtractedData() {
this._exporterService.export(this._data, this._options);
this._data = new Array();
this.exportCompleted.emit();
}
extractSpecialRows(outlet) {
this._data.push(...this.dataExtractor.extractRows(this._cdkTable, this.hiddenColumns, outlet));
}
extractTableHeader() {
this.extractSpecialRows(this._cdkTable._headerRowOutlet);
}
extractTableFooter() {
this.extractSpecialRows(this._cdkTable._footerRowOutlet);
}
hasNextPage() {
if (this.getCurrentPageIndex() < this.getPageCount() - 1) {
return true;
}
else {
return false;
}
}
nextPage() {
this.goToPage(this.getCurrentPageIndex() + 1);
}
getPaginatedRowIndex(index) {
return index + (this.getPageSize() * this.getCurrentPageIndex());
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: CdkTableExporter, deps: "invalid", target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "17.3.12", type: CdkTableExporter, inputs: { hiddenColumns: "hiddenColumns", exporter: "exporter" }, outputs: { exportCompleted: "exportCompleted", exportStarted: "exportStarted" }, ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.3.12", ngImport: i0, type: CdkTableExporter, decorators: [{
type: Directive
}], ctorParameters: () => [{ type: i1.ServiceLocatorService }, { type: i2.DataExtractorService }, { type: undefined }], propDecorators: { hiddenColumns: [{
type: Input
}], exporter: [{
type: Input
}], exportCompleted: [{
type: Output
}], exportStarted: [{
type: Output
}] } });
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{ DataRowOutlet } from '@angular/cdk/table';\nimport { Directive, EventEmitter, Input, Output } from '@angular/core';\nimport { Observable, Subscription } from 'rxjs';\nimport { ExportType } from './export-type';\nimport { ExcelOptions, Options, TxtOptions } from './options';\nimport { DataExtractorService } from './services/data-extractor.service';\nimport { Exporter } from './services/exporters/exporter';\nimport { ServiceLocatorService } from './services/service-locator.service';\n\n/**\n * Exporter class for CdkTable. Abstracts the varying behaviors among different CdkTable implementations.\n */\n@Directive()\nexport abstract class CdkTableExporter {\n\n  private _exporterService: Exporter<Options>;\n\n  @Input() hiddenColumns?: Array<number>;\n  @Input() exporter?: Exporter<Options>;\n  @Output() exportCompleted = new EventEmitter<void>();\n  @Output() exportStarted = new EventEmitter<void>();\n\n  /**\n   * Data array which is extracted from nativeTable\n   */\n  private _data: Array<any>;\n\n  private _isIterating: boolean;\n\n  private _initialPageIndex: number;\n\n  private _isExporting: boolean;\n\n  private _subscription: Subscription | undefined;\n\n  private _options?: Options;\n\n  private _selectedRows: Array<number>;\n\n  constructor(\n    private serviceLocator: ServiceLocatorService,\n    private dataExtractor: DataExtractorService,\n    protected _cdkTable: any\n  ) {}\n\n  /**\n   * Must return the number of pages of the table\n   */\n  public abstract getPageCount(): number;\n\n  /**\n   * Must return the number of items to display on a page\n   */\n  public abstract getPageSize(): number;\n\n  /**\n   * Must return the index of the current page that's displayed\n   */\n  public abstract getCurrentPageIndex(): number;\n\n  /**\n   * Must return the total number of items in the table\n   */\n  public abstract getTotalItemsCount(): number;\n\n  /**\n   * When called, the CdkTable should render the rows inside the page whose index given as parameter\n   * @param index page index\n   */\n  public abstract goToPage(index: number): void;\n\n  /**\n   * Must return an observable that notifies the subscribers about page changes\n   */\n  public abstract getPageChangeObservable(): Observable<any> | undefined;\n\n  /**\n   * Triggers page event chain thus extracting and exporting all the rows in nativetables in pages\n   */\n  exportTable(exportType?: ExportType | 'xls' | 'xlsx' | 'csv' | 'txt' | 'json' | 'other', options?: Options | ExcelOptions | TxtOptions) {\n    this.loadExporter(exportType);\n    this._options = options;\n    this.exportStarted.emit();\n    this._isIterating = true;\n    this._isExporting = true;\n    this._data = new Array<any>();\n    this.extractTableHeader();\n    try {\n      this.exportWithPagination();\n    } catch (notPaginated) {\n      this.exportSinglePage();\n    }\n  }\n\n  toggleRow(index: number): void {\n    const paginatedRowIndex: number = this.getPaginatedRowIndex(index);\n    if (this.isToggleOn(paginatedRowIndex)) {\n      this.toggleOff(paginatedRowIndex);\n    } else {\n      this.toggleOn(paginatedRowIndex);\n    }\n  }\n\n  /**\n   * This event will clear rows selection done using toggleRow functionality\n   */\n  resetToggleRows() {\n    this._selectedRows = [];\n  }\n\n  private toggleOn(index: number) {\n    this._selectedRows = [...(this._selectedRows || []), index];\n  }\n\n  private toggleOff(index: number) {\n    this._selectedRows =  this._selectedRows.filter(x => x !== index);\n  }\n\n  private isToggleOn(index: number): boolean {\n    return this._selectedRows?.includes(index);\n  }\n\n  private loadExporter(exportType: any) {\n    this._exporterService = this.serviceLocator.getService(exportType, this.exporter);\n  }\n\n  private exportWithPagination() {\n    this._initialPageIndex = this.getCurrentPageIndex();\n    this.initPageHandler();\n    this.goToPage(0);\n  }\n\n  private exportSinglePage() {\n    this.extractDataOnCurrentPage();\n    this.extractTableFooter();\n    this.exportExtractedData();\n  }\n\n  private extractDataOnCurrentPage() {\n    const rows = this.dataExtractor.extractRows(this._cdkTable, this.hiddenColumns);\n    this._data = this._data.concat(this.getSelectedRows(rows));\n  }\n\n  private getSelectedRows(rows: Array<any>) {\n    if (this.isSelectiveExport()) {\n      return rows.filter((_, i) => this._selectedRows.includes(this.getPaginatedRowIndex(i)));\n    } else {\n      return rows;\n    }\n  }\n\n  private isSelectiveExport(): boolean {\n    return this._selectedRows && !this.isMasterToggleOff() &&  !this.isMasterToggleOn();\n  }\n\n  private isMasterToggleOn(): boolean {\n    return this.compareSelectedRowCount(this.getTotalItemsCount());\n  }\n\n  private isMasterToggleOff(): boolean {\n    return this.compareSelectedRowCount(0);\n  }\n\n  private compareSelectedRowCount(rowCount: number): boolean {\n    return !!(this._selectedRows.length === rowCount);\n  }\n\n  private initPageHandler(): void {\n    if (!this._subscription) {\n      this._subscription = this.getPageChangeObservable()?.subscribe(() => {\n        setTimeout(() => {\n          if (this._isIterating) {\n            this.extractDataOnCurrentPage();\n            if (this.hasNextPage()) {\n              this.nextPage();\n            } else {\n              this._isIterating = false;\n              this.goToPage(this._initialPageIndex);\n            }\n          } else if (this._isExporting) {\n            this._isExporting = false;\n            this.extractTableFooter();\n            this.exportExtractedData();\n          }\n        });\n      });\n    }\n  }\n\n  private exportExtractedData() {\n    this._exporterService.export(this._data, this._options);\n    this._data = new Array<any>();\n    this.exportCompleted.emit();\n  }\n\n  private extractSpecialRows(outlet: DataRowOutlet) {\n    this._data.push(...this.dataExtractor.extractRows(this._cdkTable, this.hiddenColumns, outlet));\n  }\n\n  private extractTableHeader() {\n    this.extractSpecialRows(this._cdkTable._headerRowOutlet);\n  }\n\n  private extractTableFooter() {\n    this.extractSpecialRows(this._cdkTable._footerRowOutlet);\n  }\n\n  private hasNextPage(): boolean {\n    if (this.getCurrentPageIndex() < this.getPageCount() - 1) {\n      return true;\n    } else {\n      return false;\n    }\n  }\n\n  private nextPage(): void {\n    this.goToPage(this.getCurrentPageIndex() + 1);\n  }\n\n  private getPaginatedRowIndex(index: number): number {\n    return index + (this.getPageSize() * this.getCurrentPageIndex());\n  }\n}\n"]}