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index.js
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index.js
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var Stream = require('stream');
var tryParse = require('tryparse')
function Row (columns) {
this.columns = columns || [];
this.data = {};
return this;
}
Row.prototype.parseToRow = function (data, delim, cb) {
var that = this;
var array = data.split(delim);
var hasColumns;
if(!that.columns) {
hasColumns = false;
}
for(var i=0; i<array.length; i++) {
if (!hasColumns) {
that.columns.push('Column' + i);
}
var data = array[i].replace(/"/g,'').trim();
// var val = parseFloat(data) || parseInt(data) || data;
var val = tryParse.float(data) || tryParse.int(data) || data;
that.data[that.columns[i]] = (val == data) ? val : data;
}
cb(null, JSON.stringify(that.data, null, 4));
};
function csv2json (opts) {
var that = this;
that.currentData = '';
that.rows = [];
that.started = false;
that.headers = opts.headers || false;
that.outputArray = opts.outputArray || false;
that.opts = opts || {};
if (!that.opts.delim || that.opts.delim === ',') {
that.opts.delim = /,(?!(?:[^",]|[^"],[^"])+")/;
}
if (that.opts.delim === '\t') {
that.opts.delim = '\\t';
}
if (typeof that.opts.doublequote === undefined) {
that.opts.doublequote = true;
}
if(that.opts.headers === true) {
that.heades = true;
}
var s = new Stream();
s.writable = true;
s.readable = true;
that.hasStarted = function () {
if(that.started === false) {
if(that.outputArray)
s.emit('data', '[');
that.started = true;
}
};
that.lineEnding = null;
that.getLineEnding = function () {
if(!that.lineEnding) {
that.lineEnding = (that.currentData.indexOf('\r') !== -1) ? '\r\n' : '\n';
}
return that.lineEnding;
};
s.write = function (buffer) {
that.currentData += buffer;
that.getLineEnding();
if(that.currentData.indexOf(that.lineEnding) !== -1) {
var i = 0;
var arr = that.currentData.split(that.lineEnding);
// if the first line is headers has been set
if (that.headers && that.started === false) {
that.opts.columns = arr[0].split(that.opts.delim);
i = 1;
that.hasStarted();
}
var len = arr.length;
for(; i<len-1;i++) {
var emitend = (that.outputArray) ? ',' : '';
var dr = new Row(that.opts.columns);
dr.parseToRow(arr[i], that.opts.delim, function (err, data) {
s.emit('data', data + emitend);
});
}
that.currentData = arr[len-1];
}
};
s.end = function (buffer) {
that.getLineEnding();
var arr = that.currentData.split(that.lineEnding);
var len = arr.length;
// if the first line is headers has been set
if (that.headers && that.started === false) {
that.opts.columns = arr[0].split(that.opts.delim);
i = 1;
that.hasStarted();
}
for(var i=0; i<len;i++) {
var emitend;
if (that.outputArray)
emitend = (i === len-1) ? '] \n' : ', \n';
else
emitend = '\n';
var dr = new Row(that.opts.columns);
dr.parseToRow(arr[i], that.opts.delim, function (err, data) {
s.emit('data', data + emitend);
});
}
s.writable = false;
};
s.destroy = function () {
s.writable = false;
};
return s;
}
module.exports = csv2json;