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https://github.com/moparisthebest/Fresh-Food-Finder
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249 lines
10 KiB
JavaScript
249 lines
10 KiB
JavaScript
/**
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* jQuery-csv (jQuery Plugin)
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* version: 0.51 (2012-04-26)
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*
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* This document is licensed as free software under the terms of the
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* MIT License: http://www.opensource.org/licenses/mit-license.php
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*
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* This plugin was originally designed to assist in parsing CSV files loaded
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* from client-side javascript. It's influenced by jQuery.json and the original
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* core RegEx comes directly from the following answer posted by a
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* StackOverflow.com user named Ridgerunner.
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* Source:
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* - http://stackoverflow.com/q/8493195/290340
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*
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* For legal purposes I'll include the "NO WARRANTY EXPRESSED OR IMPLIED.
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* USE AT YOUR OWN RISK.". Which, in 'layman's terms' means, by using this
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* library you are accepting responsability if it breaks your code.
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*
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* Legal jargon aside, I will do my best to provide a useful and stable core
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* that can effectively be built on.
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*
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* Copyrighted 2012 by Evan Plaice.
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*/
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(function( $ ) {
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/**
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* jQuery.csv.defaults
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* Encapsulates the method paramater defaults for the CSV plugin module.
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*/
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$.csvDefaults = {
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separator:',',
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delimiter:'"',
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skip:0,
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headerLine:1,
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dataLine:2
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};
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/**
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* jQuery.csvEntry2Array(csv)
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* Converts a CSV string to a javascript array.
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*
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* @param {Array} csv The string containing the CSV data.
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* @param {Object} [meta] The dictionary where the meta variables (ie separator, delimiter) are defined. Defaults to an empty object ({}).
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* @param {Character} [separator] An override for the separator character. Defaults to a comma(,).
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* @param {Character} [delimiter] An override for the delimiter character. Defaults to a quote(').
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*
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* This method deals with simple CSV strings only. It's useful if you only
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* need to parse a single entry. If you need to parse more than one line,
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* use $.csv2Array instead.
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*/
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$.csvEntry2Array = function(csv, meta) {
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var meta = (meta !== undefined ? meta : {});
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var separator = 'separator' in meta ? meta.separator : $.csvDefaults.separator;
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var delimiter = 'delimiter' in meta ? meta.delimiter : $.csvDefaults.delimiter;
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// build the CSV validator regex
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var reValid = /^\s*(?:D[^D\\]*(?:\\[\S\s][^D\\]*)*D|[^SD\s\\]*(?:\s+[^SD\s\\]+)*)\s*(?:S\s*(?:D[^D\\]*(?:\\[\S\s][^D\\]*)*D|[^SD\s\\]*(?:\s+[^SD\s\\]+)*)\s*)*$/;
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reValid = RegExp(reValid.source.replace(/S/g, separator));
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reValid = RegExp(reValid.source.replace(/D/g, delimiter));
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// build the CSV line parser regex
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var reValue = /(?!\s*$)\s*(?:D([^D\\]*(?:\\[\S\s][^D\\]*)*)D|([^SD\s\\]*(?:\s+[^SD\s\\]+)*))\s*(?:S|$)/g;
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reValue = RegExp(reValue.source.replace(/S/g, separator), 'g');
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reValue = RegExp(reValue.source.replace(/D/g, delimiter), 'g');
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// Return NULL if input string is not well formed CSV string.
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if (!reValid.test(csv)) {
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return null;
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}
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// "Walk" the string using replace with callback.
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var output = [];
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csv.replace(reValue, function(m0, m1, m2) {
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// Remove backslash from any delimiters in the value
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if (m1 !== undefined) {
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var reDelimiterUnescape = /\\D/g;
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reDelimiterUnescape = RegExp(reDelimiterUnescape.source.replace(/D/, delimiter), 'g');
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output.push(m1.replace(reDelimiterUnescape, delimiter));
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} else if (m2 !== undefined) {
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output.push(m2);
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}
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return '';
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});
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// Handle special case of empty last value.
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var reEmptyLast = /S\s*$/;
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reEmptyLast = RegExp(reEmptyLast.source.replace(/S/, separator));
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if (reEmptyLast.test(csv)) {
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output.push('');
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}
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return output;
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};
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/**
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* jQuery.array2CSVEntry(array)
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* Converts a javascript array to a CSV String.
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*
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* @param {Array} array The array containing the CSV data.
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* @param {Object} [meta] The dictionary where the meta variables (ie separator, delimiter) are defined. Defaults to an empty object ({}).
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* @param {Character} [separator] An override for the separator character. Defaults to a comma(,).
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* @param {Character} [delimiter] An override for the delimiter character. Defaults to a quote(').
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*
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* This method deals with simple CSV arrays only. It's useful if you only
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* need to convert a single entry. If you need to convert more than one line,
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* use $.csv2Array instead.
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*/
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$.array2CSVEntry = function(array, meta) {
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var meta = (meta !== undefined ? meta : {});
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var separator = 'separator' in meta ? meta.separator : $.csvDefaults.separator;
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var delimiter = 'delimiter' in meta ? meta.delimiter : $.csvDefaults.delimiter;
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var output = []
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for(i in array) {
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output.push(array[i]);
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}
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return output;
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};
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/**
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* jQuery.csv2Array(csv)
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* Converts a CSV string to a javascript array.
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*
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* @param {String} csv The string containing the raw CSV data.
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* @param {Object} [meta] The dictionary where the meta variables (ie separator, delimiter, skip) are defined. Defaults to an empty object ({}).
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* @param {Character} [separator] An override for the separator character. Defaults to a comma(,).
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* @param {Character} [delimiter] An override for the delimiter character. Defaults to a quote(').
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* @param {Integer} [skip] The number of lines that need to be skipped before the parser starts. Defaults to 0.
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*
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* This method deals with multi-line CSV. The breakdown is simple. The first
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* dimension of the array represents the line (or entry/row) while the second
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* dimension contains the values (or values/columns).
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*/
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$.csv2Array = function(csv, meta) {
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var meta = (meta !== undefined ? meta : {});
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var separator = 'separator' in meta ? meta.separator : $.csvDefaults.separator;
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var delimiter = 'delimiter' in meta ? meta.delimiter : $.csvDefaults.delimiter;
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var skip = 'skip' in meta ? meta.skip : $.csvDefaults.skip;
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// process by line
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var lines = csv.split(/\r\n|\r|\n/g);
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var output = [];
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for(var i in lines) {
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if(i < skip) {
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continue;
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}
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// process each value
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var line = $.csvEntry2Array(lines[i], {
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delimiter: delimiter,
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separator: separator
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});
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output.push(line);
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}
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return output;
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};
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/**
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* jQuery.array2CSV(array)
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* Converts a CSV array to a javascript string.
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*
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* @param {Array} csv The array containing the CSV data.
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* @param {Object} [meta] The dictionary where the meta variables (ie separator, delimiter, skip) are defined. Defaults to an empty object ({}).
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* @param {Character} [separator] An override for the separator character. Defaults to a comma(,).
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* @param {Character} [delimiter] An override for the delimiter character. Defaults to a quote(').
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* @param {Integer} [skip] The number of lines that need to be skipped before the parser starts. Defaults to 0.
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*
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* This method dimensional multi-line CSV arrays. The breakdown is simple.
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* The first dimension of the array gets mapped to rows, the second dimension
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* gets mapped to data within those rows.
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*/
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//$.array2CSV = function(array, meta) {
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// alert('Not implemented yet'); // TODO: implement this
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//};
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/**
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* jQuery.csv2Dictionary(csv)
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* Converts a CSV string to a javascript dictionary.
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* @param {String} csv The string containing the raw CSV data.
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* @param {Object} [meta] The dictionary where the meta variables (ie separator, delimiter, headerLine, dataLine) are defined. Defaults to an empty object ({}).
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* @param {Character} [separator] An override for the separator character. Defaults to a comma(,).
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* @param {Character} [delimiter] An override for the delimiter character. Defaults to a quote(').
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* @param {Integer} [headerLine] The line in the file that contains the header data. Defaults to 1 (1-based counting).
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* @param {Integer} [dataLine] The line where the data values start. Defaults to 2 (1-based counting).
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*
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* This method deals with multi-line CSV strings. Where the headers line is
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* used as the key for each value per entry.
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*/
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$.csv2Dictionary = function(csv, meta) {
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var meta = (meta !== undefined ? meta : {});
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var separator = 'separator' in meta ? meta.separator : $.csvDefaults.separator;
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var delimiter = 'delimiter' in meta ? meta.delimiter : $.csvDefaults.delimiter;
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var headerLine = 'headerLine' in meta ? meta.headerLine : $.csvDefaults.headerLine;
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var dataLine = 'dataLine' in meta ? meta.dataLine : $.csvDefaults.dataLine;
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// process data into lines
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var lines = csv.split(/\r\n|\r|\n/g);
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// fetch the headers
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var headers = $.csvEntry2Array(lines[(headerLine - 1)]);
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// process the data
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var output = [];
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for(var i in lines) {
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if(i < (dataLine - 1)) {
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continue;
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}
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// process each value
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if ( i == 20 ){
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console.log( i );
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}
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var line = $.csvEntry2Array(lines[i], {
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delimiter: delimiter,
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separator: separator
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});
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var lineDict = {};
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for(var j in headers) {
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try{
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lineDict[headers[j]] = line[j];
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} catch( e ) {
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console.log( e );
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}
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}
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output.push(lineDict);
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}
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return output;
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};
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/**
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* jQuery.dictionary2CSV(dictionary)
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* Converts a javascript dictionary to a CSV string.
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* @param {Object} dictionary The dictionary containing the CSV data.
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* @param {Object} [meta] The dictionary where the meta variables (ie separator, delimiter, headerLine, dataLine) are defined. Defaults to an empty object ({}).
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* @param {Character} [separator] An override for the separator character. Defaults to a comma(,).
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* @param {Character} [delimiter] An override for the delimiter character. Defaults to a quote(').
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* @param {Integer} [headerLine] The line in the file that contains the header data. Defaults to 1 (1-based counting).
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* @param {Integer} [dataLine] The line where the data values start. Defaults to 2 (1-based counting).
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*
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* This method generates a CSV file from a javascript dictionary structure.
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* It starts by detecting the headers and adding them as the first line of
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* the CSV file, followed by a structured dump of the data.
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*/
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//$.dictionary2CSV = function(dictionary, meta) {
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// alert('Not implemented yet'); // TODO: implement this
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//};
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})( jQuery );
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