forked from sheetjs/sheetjs
145 lines
3.9 KiB
JavaScript
145 lines
3.9 KiB
JavaScript
/* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
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/* Notes:
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- usage: `ReactDOM.render( <SheetJSApp />, document.getElementById('app') );`
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- xlsx.full.min.js is loaded in the head of the HTML page
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- this script should be referenced with type="text/babel"
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- babel.js in-browser transpiler should be loaded before this script
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*/
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function SheetJSApp() {
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const [data, setData] = React.useState([]);
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const [cols, setCols] = React.useState([]);
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const handleFile = (file) => {
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const reader = new FileReader();
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reader.onload = (e) => {
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/* Parse data */
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const ab = e.target.result;
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const wb = XLSX.read(ab, {type:'array'});
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/* Get first worksheet */
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const wsname = wb.SheetNames[0];
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const ws = wb.Sheets[wsname];
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/* Convert array of arrays */
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const data = XLSX.utils.sheet_to_json(ws, {header:1});
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/* Update state */
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setData(data);
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setCols(make_cols(ws['!ref']))
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};
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reader.readAsArrayBuffer(file);
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}
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const exportFile = () => {
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/* convert state to workbook */
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const ws = XLSX.utils.aoa_to_sheet(data);
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const wb = XLSX.utils.book_new();
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XLSX.utils.book_append_sheet(wb, ws, "SheetJS");
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/* generate XLSX file and send to client */
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XLSX.writeFile(wb, "sheetjs.xlsx")
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};
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return (
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<DragDropFile handleFile={handleFile}>
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<div className="row"><div className="col-xs-12">
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<DataInput handleFile={handleFile} />
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</div></div>
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<div className="row"><div className="col-xs-12">
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<button disabled={!data.length} className="btn btn-success" onClick={exportFile}>Export</button>
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</div></div>
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<div className="row"><div className="col-xs-12">
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<OutTable data={data} cols={cols} />
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</div></div>
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</DragDropFile>
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);
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}
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if(typeof module !== 'undefined') module.exports = SheetJSApp
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/* -------------------------------------------------------------------------- */
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/*
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Simple HTML5 file drag-and-drop wrapper
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usage: <DragDropFile handleFile={handleFile}>...</DragDropFile>
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handleFile(file:File):void;
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*/
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function DragDropFile({ handleFile, children }) {
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const suppress = (e) => { e.stopPropagation(); e.preventDefault(); };
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const handleDrop = (e) => { e.stopPropagation(); e.preventDefault();
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const files = e.dataTransfer.files;
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if(files && files[0]) handleFile(files[0]);
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};
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return (
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<div
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onDrop={handleDrop}
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onDragEnter={suppress}
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onDragOver={suppress}
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>
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{children}
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</div>
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);
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}
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/*
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Simple HTML5 file input wrapper
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usage: <DataInput handleFile={callback} />
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handleFile(file:File):void;
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*/
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function DataInput({ handleFile }) {
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const handleChange = (e) => {
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const files = e.target.files;
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if(files && files[0]) handleFile(files[0]);
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};
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return (
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<form className="form-inline">
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<div className="form-group">
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<label htmlFor="file">Drag or choose a spreadsheet file</label>
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<br />
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<input
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type="file"
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className="form-control"
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id="file"
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accept={SheetJSFT}
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onChange={handleChange}
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/>
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</div>
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</form>
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)
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}
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/*
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Simple HTML Table
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usage: <OutTable data={data} cols={cols} />
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data:Array<Array<any> >;
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cols:Array<{name:string, key:number|string}>;
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*/
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function OutTable({ data, cols }) {
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return (
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<div className="table-responsive">
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<table className="table table-striped">
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<thead>
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<tr>{cols.map((c) => <th key={c.key}>{c.name}</th>)}</tr>
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</thead>
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<tbody>
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{data.map((r,i) => <tr key={i}>
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{cols.map(c => <td key={c.key}>{ r[c.key] }</td>)}
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</tr>)}
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</tbody>
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</table>
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</div>
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);
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}
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/* list of supported file types */
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const SheetJSFT = [
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"xlsx", "xlsb", "xlsm", "xls", "xml", "csv", "txt", "ods", "fods", "uos", "sylk", "dif", "dbf", "prn", "qpw", "123", "wb*", "wq*", "html", "htm"
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].map(x => `.${x}`).join(",");
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/* generate an array of column objects */
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const make_cols = refstr => {
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let o = [], C = XLSX.utils.decode_range(refstr).e.c + 1;
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for(var i = 0; i < C; ++i) o[i] = {name:XLSX.utils.encode_col(i), key:i}
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return o;
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};
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