133 lines
4.0 KiB
TypeScript
133 lines
4.0 KiB
TypeScript
/* sheetjs (C) 2013-present SheetJS -- https://sheetjs.com */
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/* vim: set ts=2: */
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import { Component, OnInit } from '@angular/core';
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import { File } from '@awesome-cordova-plugins/file/ngx';
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import * as XLSX from 'xlsx';
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type AOA = any[][];
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@Component({
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selector: 'app-home',
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//templateUrl: 'home.page.html',
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styleUrls: ['home.page.scss'],
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standalone: false,
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template: `
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<ion-header>
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<ion-toolbar>
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<ion-title>SheetJS Ionic Demo</ion-title>
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</ion-toolbar>
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</ion-header>
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<ion-content [fullscreen]="true">
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<ion-header collapse="condense">
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<ion-toolbar>
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<ion-title>SheetJS Demo</ion-title>
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</ion-toolbar>
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</ion-header>
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<ion-grid>
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<ion-row *ngFor="let row of data">
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<ion-col *ngFor="let val of row">
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{{val}}
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</ion-col>
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</ion-row>
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</ion-grid>
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</ion-content>
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<ion-footer padding>
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<input type="file" (change)="onFileChange($event)" multiple="false" />
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<button ion-button color="secondary" (click)="import()">Import Data</button>
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<button ion-button color="secondary" (click)="export()">Export Data</button>
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</ion-footer>
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`
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})
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export class HomePage implements OnInit {
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data: AOA = [[1,2,3],[4,5,6]];
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constructor(public file: File) {}
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async ngOnInit(): Promise<void> {
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const res: Response = await fetch("https://docs.sheetjs.com/pres.numbers");
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const ab: ArrayBuffer = await res.arrayBuffer();
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this.read(ab);
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}
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read(ab: ArrayBuffer) {
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/* read workbook */
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const wb: XLSX.WorkBook = XLSX.read(new Uint8Array(ab), {type: 'array'});
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/* grab first sheet */
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const wsname: string = wb.SheetNames[0];
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const ws: XLSX.WorkSheet = wb.Sheets[wsname];
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/* save data */
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this.data = (XLSX.utils.sheet_to_json(ws, {header: 1}) as AOA);
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};
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write(): XLSX.WorkBook {
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/* generate worksheet */
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const ws: XLSX.WorkSheet = XLSX.utils.aoa_to_sheet(this.data);
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/* generate workbook and add the worksheet */
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const wb: XLSX.WorkBook = XLSX.utils.book_new();
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XLSX.utils.book_append_sheet(wb, ws, 'SheetJS');
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return wb;
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};
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/* File Input element for browser */
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onFileChange(evt: any) {
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/* wire up file reader */
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const target: DataTransfer = (evt.target as DataTransfer);
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if (target.files.length !== 1) { throw new Error('Cannot use multiple files'); }
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const reader: FileReader = new FileReader();
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reader.onload = (e: any) => {
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const ab: ArrayBuffer = e.target.result;
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this.read(ab);
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};
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reader.readAsArrayBuffer(target.files[0]);
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};
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/* Import button for mobile */
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async import() {
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try {
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const target: string = this.file.documentsDirectory || this.file.externalDataDirectory || this.file.dataDirectory || '';
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const dentry = await this.file.resolveDirectoryUrl(target);
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const url: string = dentry.nativeURL || '';
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alert(`Attempting to read SheetJSIonic.xlsx from ${url}`);
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const ab: ArrayBuffer = await this.file.readAsArrayBuffer(url, 'SheetJSIonic.xlsx');
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this.read(ab);
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} catch(e) {
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const m: string = (e as Error).message;
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alert(m.match(/It was determined/) ? 'Use File Input control' : `Error: ${m}`);
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}
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};
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/* Export button */
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async export() {
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const wb: XLSX.WorkBook = this.write();
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const filename = 'SheetJSIonic.xlsx';
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try {
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/* generate Blob */
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const wbout: ArrayBuffer = XLSX.write(wb, { bookType: 'xlsx', type: 'array' });
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/* find appropriate path for mobile */
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const target: string = this.file.documentsDirectory || this.file.externalDataDirectory || this.file.dataDirectory || '';
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const dentry = await this.file.resolveDirectoryUrl(target);
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const url: string = dentry.nativeURL || '';
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/* attempt to save blob to file */
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await this.file.writeFile(url, filename, wbout, {replace: true});
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alert(`Wrote to SheetJSIonic.xlsx in ${url}`);
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} catch(e) {
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if((e as Error).message.match(/It was determined/)) {
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/* in the browser, use writeFile */
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XLSX.writeFile(wb, filename);
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} else {
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alert(`Error: ${(e as Error).message}`);
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}
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}
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};
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}
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