@adaptabletools/adaptable/src/View/DataImport/systemFileHandlers.js

Powerful data-agnostic HTML5 AG Grid extension which provides advanced, cutting-edge functionality to meet all DataGrid requirements

import { readJSONFile } from '../../components/FileDroppable';
const jsonHandler = {
    fileExtension: '.json',
    handleFile: (file) => readJSONFile(file),
};
export const parseCSV = (content) => {
    const lines = content.split('\n');
    const headers = lines[0].split(',');
    const data = [];
    if (lines.length <= 1) {
        return null;
    }
    for (let i = 1; i < lines.length; i++) {
        const values = lines[i].split(',');
        if (values.length === headers.length) {
            const item = {};
            for (let j = 0; j < headers.length; j++) {
                const value = values[j];
                item[headers[j]] = value === '' || isNaN(Number(value)) ? value : Number(value); // '0012345'
            }
            data.push(item);
        }
    }
    return data;
};
const csvFileHandler = {
    fileExtension: '.csv',
    handleFile: (file) => {
        return new Promise((resolve, reject) => {
            const reader = new FileReader();
            reader.onload = (event) => {
                const content = event.target?.result;
                resolve(parseCSV(content));
            };
            reader.readAsText(file);
        });
    },
};
export const systemFileHandlers = [jsonHandler, csvFileHandler];