STEINNI
78 lines
2.7 KiB
JavaScript
78 lines
2.7 KiB
JavaScript
if(!app.helpers) app.helpers = {}
|
|
/**
|
|
* Helper for data transformation.
|
|
* @class Translator
|
|
* @category MyEic
|
|
* @subcategory Helpers
|
|
*/
|
|
app.helpers.translator = {
|
|
toCSV(collection, options /* keys=null, withHeader=true, quoteChar = '"', delimiter = ';', downloadName=null */) {
|
|
|
|
let defaultOptions = {
|
|
headers: [],
|
|
delimiter: ',',
|
|
quoteCharacter: '"',
|
|
filename: 'data'
|
|
}
|
|
|
|
options = {...defaultOptions, ...options}
|
|
/**/
|
|
const _download = function(data, filename) {
|
|
|
|
const blob = new Blob([new Uint8Array([0xEF, 0xBB, 0xBF]), data], { type: 'text/csv; charset=utf-8' });
|
|
const url = window.URL.createObjectURL(blob);
|
|
const a = document.createElement('a');
|
|
a.setAttribute('href', url);
|
|
a.setAttribute('download', filename + '.csv');
|
|
a.click();
|
|
}
|
|
|
|
if(!options.keys) { // take min. common set of keys in collection (take 1st then successively intersect to itself)
|
|
let ids = Object.keys(collection);
|
|
options.keys = Object.keys(collection[ids[0]]);
|
|
for(let id of ids) {
|
|
options.keys = options.keys.filter(x => (collection[id].hasOwnProperty(x)))
|
|
}
|
|
}
|
|
|
|
let csv='';
|
|
let row=[];
|
|
|
|
if(options.headers && options.headers.length > 0){
|
|
for(let key of options.headers) {
|
|
row.push(options.quoteCharacter + key + options.quoteCharacter);
|
|
}
|
|
csv += row.join(options.delimiter)+'\n';
|
|
} else if(Array.isArray(options.headers)) {
|
|
for(let title of options.headers){
|
|
row.push(options.quoteCharacter + title + options.quoteCharacter);
|
|
}
|
|
csv += row.join(options.delimiter)+'\n';
|
|
}
|
|
for(let id in collection){
|
|
row = [];
|
|
for(let key of options.keys){
|
|
let item = ''
|
|
if(typeof(key)=='string'){ // normal column
|
|
item = collection[id]
|
|
for(let k of key.split('.')) { // Allow for sub-objects with dotted keys notation
|
|
if(!item) break
|
|
item = item[k]
|
|
}
|
|
} else if(typeof(key)=='function') { // computed column
|
|
item = key(collection[id])
|
|
} else console.warn('CSV: Bad column: ',key)
|
|
row.push(options.quoteCharacter + item + options.quoteCharacter);
|
|
}
|
|
csv += row.join(options.delimiter)+'\n';
|
|
}
|
|
|
|
if(options.filename) _download(csv, options.filename);
|
|
|
|
return(csv);
|
|
},
|
|
fromCSV() {
|
|
|
|
}
|
|
}
|