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TiddlyWiki5/core/modules/utils/csv.js

47 lines
1.1 KiB
JavaScript

/*\
title: $:/core/modules/utils/csv.js
type: application/javascript
module-type: utils
A barebones CSV parser
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
/*
Parse a CSV string with a header row and return an array of hashmaps.
*/
exports.parseCsvStringWithHeader = function(text,options) {
options = options || {};
var separator = options.separator || ",",
rows = text.split(/\r?\n/mg).map(function(row) {
return $tw.utils.trim(row);
}).filter(function(row) {
return row !== "";
});
if(rows.length < 1) {
return "Missing header row";
}
var headings = rows[0].split(separator),
results = [];
for(var row=1; row<rows.length; row++) {
var columns = rows[row].split(separator),
columnResult = Object.create(null);
if(columns.length !== headings.length) {
return "Malformed CSV row '" + rows[row] + "'";
}
for(var column=0; column<columns.length; column++) {
var columnName = headings[column];
columnResult[columnName] = $tw.utils.trim(columns[column] || "");
}
results.push(columnResult);
}
return results;
}
})();