Simple currency converter

Simple Currency Converter.EXCEL.yaml

name: Simple Currency Converter
description: Simple currency converter
host: EXCEL
api_set: {}
script:
  content: >
    /*
     * Copyright (c) Riwut Libinuko. All rights reserved. Licensed under the MIT license.
     */

    declare let moment: any;

    const tableName = "TransactionTable";


    let tableSetup: Record<string, number> = {};


    $("#convert").click(() => tryCatch(convert));

    $("#setup").click(() => tryCatch(setupSample));


    /** Main converting function **/

    async function convert() {
      await Excel.run(async (context) => {
        const table = context.workbook.tables.getItem(tableName);
        table.columns.load("items");
        table.rows.load("items,value");
        await context.sync();

        if (!isTableValid(table.columns.items)) {
          console.error(
            'Error: Some of default table header is missing. Required headers: \r\n"Currency","Price (Currency)","Transaction Date","Base","Price in Base"'
          );
          return;
        }
    const startDate = new Date();
        const convertedCurrency = await Promise.all( 
             table.rows.items.map( async (row,idx) => {
                const priceInBase = row.values[0][tableSetup["Price in Base"]];
                const priceInCurrency = row.values[0][tableSetup["Price (Currency)"]];
                const transactionDate = row.values[0][tableSetup["Transaction Date"]];
                const currency = row.values[0][tableSetup["Currency"]];
                const baseCurrency = row.values[0][tableSetup["Base"]];

                if (priceInBase === "") {
                const dateMoment = moment.fromOADate(transactionDate);
                const period = dateMoment.format("YYYY-MM-DD");
                const queryUrl = convertValue(currency, baseCurrency, period, period);
                //return fetch(queryUrl).then(response => response.json());
                const result = fetch(queryUrl).then(response => response.json());
                return result;
                // if(result !== typeof(undefined)){
                //     const converted = priceInCurrency * result.rates[baseCurrency];
                //     return converted;
                // } else {
                //   return 0;
                // }      
              } else {
                return -1;
              }     
            })
           );
           
        //console.log(convertedCurrency);
        let index = 0;
        let skippedRows = [];
        for (let row of table.rows.items) {
          const priceBaseRange = row.getRange().getCell(0, tableSetup["Price in Base"]);
          const priceInCurrency = row.values[0][tableSetup["Price (Currency)"]];
          const baseCurrency = row.values[0][tableSetup["Base"]];

          if (convertedCurrency[index] == -1) {
            skippedRows.push(index + 1)
          } else {
            const result = convertedCurrency[index].rates[baseCurrency] * priceInCurrency;
            priceBaseRange.values = [[result]]
          }
          index++;
        }

        if (skippedRows.length > 0) {
          if (skippedRows.length == 1) {
            console.info(`Row: ${skippedRows.join(',')} has been converted. Skipped.`);
          } else {
            console.info(`Rows: ${skippedRows.join(',')} have been converted. Skipped.`);
          }
        }
         //await context.sync();
       });
    }


    /** Check if the table contains the necessary columns.
     * These columns can be in any order within the
     **/
    function isTableValid(items: Excel.TableColumn[]) {
      // Build the column index, search table header
      // Currency - origin currency
      // Price (Currency) - price in origin currency
      // Transaction Date - transaction date
      // Base  - home currency
      // Price in Base - price in base currency
      items.forEach((col, idx, arr) => {
        tableSetup[col.name] = idx;
      });
      if (
        tableSetup["Currency"] === undefined ||
        tableSetup["Price (Currency)"] === undefined ||
        tableSetup["Transaction Date"] === undefined ||
        tableSetup["Base"] === undefined ||
        tableSetup["Price in Base"] === undefined
      ) {
        return false;
      }
      return true;
    }


    /** Request currency exchange on specific date **/

    function convertValue(currencyOrig, currencyBase, start, end) {
      // GET https://api.exchangeratesapi.io/latest?symbols=SGD,USD&base=SGD&start_at=2019-10-05&end_at=2019-10-05
      const baseUrl = "https://api.exchangeratesapi.io/latest";
      const query =
        "?base=" + currencyOrig + "&symbols=" + currencyBase + "," + currencyOrig + "&start_at=" + start + "&end_at=" + end;
      return baseUrl + query;
    }


    /** Default helper for invoking an action and handling errors. */

    async function tryCatch(callback) {
      try {
        await callback();
      } catch (error) {
        // Note: In a production add-in, you'd want to notify the user through your add-in's UI.
        console.error(error);
      }
    }

    /* Create sample data */

    /* Default header */

    /* "Currency","Price (Currency)","Transaction Date","Base","Price in Base"
    */

    async function setupSample() {
      await Excel.run(async (context) => {
        context.workbook.worksheets.getItemOrNullObject("Sample").delete();
        const sheet = context.workbook.worksheets.add("Sample");
        const transactionTable = sheet.tables.add("A1:F1", true);
        transactionTable.name = tableName;
        transactionTable.getHeaderRowRange().values = [
          ["Product", "Currency", "Price (Currency)", "Transaction Date", "Base", "Price in Base"]
        ];
        transactionTable.rows.add(null, [
          ["Frames", "MYR", 5000, "2019-10-05", "SGD", null],
          ["Chains", "CNY", 12000, "2019-10-04", "SGD", null]
        ]);
        transactionTable.getRange().format.autofitColumns();
        sheet.activate();
      });
    }
  language: typescript
template:
  content: "<header class=\"ms-welcome__header ms-bgColor-neutralLighter\" style='text-align: center'>\n\t<h1 class=\"ms-font-su\">Simple Currency Converter</h1>\n</header>\n\n<section class=\"ms-font-m\">\n\t<p>Simple currency converter shows how to read data from a transaction table, and uses currency converter API to\n\t\tcalculate the amount in base currency. </p>\n\t<p>The code also performs table validation and identify if the table has predefined headers. You can try to\n\t\tre-arrange the\n\t\tcolumn, and see by yourself! </p>\n</section>\n\n<section class=\"setup ms-font-m\">\n\t<h3>Set up</h3>\n\t<button id=\"setup\" class=\"ms-Button\">\n        <span class=\"ms-Button-label\">Add sample data</span>\n    </button>\n</section>\n\n<section class=\"samples ms-font-m\">\n\t<h3>Try it out</h3>\n\t<p>The currency conversion is providef by <a href=\"https://exchangeratesapi.io\">exchangeratesapi.io</a> which uses\n\t\texchange rate data published by the European Central Bank. Click \"Convert\"</p>\n\t<button id=\"convert\" class=\"ms-Button\">\n\t\t    <span class=\"ms-Button-label\">Convert</span>\n\t\t</button>\n</section>"
  language: html
style:
  content: |-
    section.samples {
        margin-top: 20px;
    }

    section.samples .ms-Button, section.setup .ms-Button {
        display: block;
        margin-bottom: 5px;
        margin-left: 20px;
        min-width: 80px;
    }
  language: css
libraries: |-
  https://appsforoffice.microsoft.com/lib/1/hosted/office.js
  @types/office-js

  [email protected]/dist/css/fabric.min.css
  [email protected]/dist/css/fabric.components.min.css

  [email protected]/client/core.min.js
  @types/core-js

  [email protected]
  @types/[email protected]

  [email protected] 
  [email protected]