Otaku-Projects / AngularJS-CRUD-PHP

/* vim: set ts=2: */

import { Component } from "@angular/core";

import * as dockModule from "tns-core-modules/ui/layouts/dock-layout";

import * as buttonModule from "tns-core-modules/ui/button";

import * as textModule from "tns-core-modules/text";

import * as dialogs from "ui/dialogs";

import * as fs from "tns-core-modules/file-system";

/* NativeScript does not support import syntax for npm modules */

const XLSX = require("./xlsx.full.min.js");

@Component({

  selector: "my-app",

  template: `

    <GridLayout rows="auto, *, auto">

      <ActionBar row="0" title="SheetJS NativeScript Demo" class="action-bar"></ActionBar>

      <!-- data converted to HTML and rendered in web view -->

      <WebView row="1" src="{{html}}"></WebView>

      <DockLayout row="2" dock="bottom" stretchLastChild="false">

        <Button text="Import File" (tap)="import()" style="padding: 10px"></Button>

        <Button text="Export File" (tap)="export()" style="padding: 10px"></Button>

      </DockLayout>

    </GridLayout>

  `

})

export class AppComponent {

  html: string = "";

  constructor() {

    const ws = XLSX.utils.aoa_to_sheet([[1,2],[3,4]]);

    this.html = XLSX.utils.sheet_to_html(ws);

  };

  /* Import button */

  async import() {

    const filename: string = "SheetJSNS.xlsx";

    /* find appropriate path */

    const target: fs.Folder = fs.knownFolders.documents() || fs.knownFolders.ios.sharedPublic();

    const url: string = fs.path.normalize(target.path + "///" + filename);

    const file: fs.File = fs.File.fromPath(url);

    try {

      /* get binary string */

      const bstr: string = await file.readText(textModule.encoding.ISO_8859_1);

      /* read workbook */

      const wb = XLSX.read(bstr, { type: "binary" });

      /* grab first sheet */

      const wsname: string = wb.SheetNames[0];

      const ws = wb.Sheets[wsname];

      /* update table */

      this.html = XLSX.utils.sheet_to_html(ws);

      dialogs.alert(`Attempting to read to SheetJSNS.xlsx in ${url}`);

    } catch(e) {

      dialogs.alert(e.message);

    }

  };

}