/*
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inspired by https://www.npmjs.com/package/react-csv-downloader
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now removed from Github
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*/
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const newLine = '\r\n';
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const appendLine = (content, row, { separator, quoted }) => {
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const line = row.map(data => {
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if (!quoted) return data;
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// quote data
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data = typeof data === 'string' ? data.replace(/"/g, '"') : data;
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return `"${data}"`;
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});
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content.push(line.join(separator));
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};
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const defaults = {
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separator: ',',
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quoted: false
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};
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export default function csv(columns, datas, options, noHeader = false) {
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options = Object.assign({}, defaults, options);
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let columnOrder;
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const content = [];
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const column = [];
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if (columns) {
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columnOrder = columns.map(v => {
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if (typeof v === 'string') return v;
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if (!noHeader) {
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column.push(typeof v.title !== 'undefined' ? v.title : v.key);
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}
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return v.key;
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});
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if (column.length > 0) appendLine(content, column, options);
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} else {
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columnOrder = [];
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datas.forEach(v => {
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if (!Array.isArray(v)) {
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columnOrder = columnOrder.concat(Object.keys(v));
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}
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});
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if (columnOrder.length > 0) {
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columnOrder = columnOrder.filter((value, index, self) => self.indexOf(value) === index);
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if (!noHeader) appendLine(content, columnOrder, options);
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}
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}
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if (Array.isArray(datas)) {
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datas.forEach(row => {
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if (!Array.isArray(row)) {
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row = columnOrder.map(k => (typeof row[k] !== 'undefined' ? row[k] : ''));
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}
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appendLine(content, row, options);
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});
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}
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return content.join(newLine);
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}
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