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132 lines
3.5 KiB
132 lines
3.5 KiB
var getDelimiter = require("./getDelimiter");
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var filterRow=require("./filterRow");
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/**
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* Convert a line of string to csv columns according to its delimiter
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* the param._header may not be ready when this is called.
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* @param {[type]} rowStr [description]
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* @param {[type]} param [Converter param]
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* @return {[type]} {cols:["a","b","c"],closed:boolean} the closed field indicate if the row is a complete row
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*/
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module.exports = function rowSplit(rowStr, param) {
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if (rowStr === "") {
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return { cols: [], closed: true };
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}
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var quote = param.quote;
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var trim = param.trim;
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var escape = param.escape;
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if (param.delimiter instanceof Array || param.delimiter.toLowerCase() === "auto") {
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param.delimiter = getDelimiter(rowStr, param);
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}
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var delimiter = param.delimiter;
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var rowArr = rowStr.split(delimiter);
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if (quote === "off") {
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return { cols: rowArr, closed: true };
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}
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var row = [];
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var inquote = false;
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var quoteBuff = '';
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for (var i = 0, rowLen = rowArr.length; i < rowLen; i++) {
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var e = rowArr[i];
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if (!inquote && trim) {
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e = e.trim();
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}
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var len = e.length;
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if (!inquote) {
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if (isQuoteOpen(e, param)) { //quote open
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e = e.substr(1);
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if (isQuoteClose(e, param)) { //quote close
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e = e.substring(0, e.length - 1);
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e = _escapeQuote(e, quote, escape);
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row.push(e);
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continue;
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} else {
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inquote = true;
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quoteBuff += e;
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continue;
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}
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} else {
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row.push(e);
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continue;
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}
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} else { //previous quote not closed
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if (isQuoteClose(e, param)) { //close double quote
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inquote = false;
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e = e.substr(0, len - 1);
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quoteBuff += delimiter + e;
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quoteBuff = _escapeQuote(quoteBuff, quote, escape);
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if (trim) {
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quoteBuff = quoteBuff.replace(/\s+$/, "");
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}
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row.push(quoteBuff);
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quoteBuff = "";
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} else {
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quoteBuff += delimiter + e;
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}
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}
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}
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if (!inquote && param._needFilterRow) {
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row = filterRow(row, param);
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}
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return { cols: row, closed: !inquote };
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// if (param.workerNum<=1){
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// }else{
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// if (inquote && quoteBuff.length>0){//for multi core, quote will be closed at the end of line
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// quoteBuff=_escapeQuote(quoteBuff,quote,escape);;
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// if (trim){
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// quoteBuff=quoteBuff.trimRight();
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// }
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// row.push(quoteBuff);
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// }
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// return {cols:row,closed:true};
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// }
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};
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function isQuoteOpen(str, param) {
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var quote = param.quote;
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var escape = param.escape;
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return str[0] === quote && (
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str[1] !== quote ||
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str[1] === escape && (str[2] === quote || str.length === 2));
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}
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function isQuoteClose(str, param) {
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var quote = param.quote;
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var count = 0;
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var idx = str.length - 1;
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var escape = param.escape;
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while (str[idx] === quote || str[idx] === escape) {
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idx--;
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count++;
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}
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return count % 2 !== 0;
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}
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function twoDoubleQuote(str, quote) {
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var twoQuote = quote + quote;
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var curIndex = -1;
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while ((curIndex = str.indexOf(twoQuote, curIndex)) > -1) {
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str = str.substring(0, curIndex) + str.substring(++curIndex);
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}
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return str;
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}
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var cachedRegExp = {};
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function _escapeQuote(segment, quote, escape) {
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var key = "es|" + quote + "|" + escape;
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if (cachedRegExp[key] === undefined) {
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// if (escape === "\\") {
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// escape = "\\\\";
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// }
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cachedRegExp[key] = new RegExp('\\'+escape + '\\'+quote, 'g');
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}
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var regExp = cachedRegExp[key];
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// console.log(regExp,segment);
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return segment.replace(regExp, quote);
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}
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