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utilities.js (62803B)

---

 /*
     ***** BEGIN LICENSE BLOCK *****
     
     Copyright © 2009 Center for History and New Media
                      George Mason University, Fairfax, Virginia, USA
                      http://zotero.org
     
     This file is part of Zotero.
     
     Zotero is free software: you can redistribute it and/or modify
     it under the terms of the GNU Affero General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
     
     Zotero is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU Affero General Public License for more details.
     
     You should have received a copy of the GNU Affero General Public License
     along with Zotero.  If not, see <http://www.gnu.org/licenses/>.
     
 	
 	Utilities based in part on code taken from Piggy Bank 2.1.1 (BSD-licensed)
 	
     ***** END LICENSE BLOCK *****
 */
 
 /*
  * Mappings for names
  * Note that this is the reverse of the text variable map, since all mappings should be one to one
  * and it makes the code cleaner
  */
 var CSL_NAMES_MAPPINGS = {
 	"author":"author",
 	"editor":"editor",
 	"bookAuthor":"container-author",
 	"composer":"composer",
 	"director":"director",
 	"interviewer":"interviewer",
 	"recipient":"recipient",
 	"reviewedAuthor":"reviewed-author",
 	"seriesEditor":"collection-editor",
 	"translator":"translator"
 }
 
 /*
  * Mappings for text variables
  */
 var CSL_TEXT_MAPPINGS = {
 	"title":["title"],
 	"container-title":["publicationTitle",  "reporter", "code"], /* reporter and code should move to SQL mapping tables */
 	"collection-title":["seriesTitle", "series"],
 	"collection-number":["seriesNumber"],
 	"publisher":["publisher", "distributor"], /* distributor should move to SQL mapping tables */
 	"publisher-place":["place"],
 	"authority":["court","legislativeBody", "issuingAuthority"],
 	"page":["pages"],
 	"volume":["volume", "codeNumber"],
 	"issue":["issue", "priorityNumbers"],
 	"number-of-volumes":["numberOfVolumes"],
 	"number-of-pages":["numPages"],	
 	"edition":["edition"],
 	"version":["versionNumber"],
 	"section":["section", "committee"],
 	"genre":["type", "programmingLanguage"],
 	"source":["libraryCatalog"],
 	"dimensions": ["artworkSize", "runningTime"],
 	"medium":["medium", "system"],
 	"scale":["scale"],
 	"archive":["archive"],
 	"archive_location":["archiveLocation"],
 	"event":["meetingName", "conferenceName"], /* these should be mapped to the same base field in SQL mapping tables */
 	"event-place":["place"],
 	"abstract":["abstractNote"],
 	"URL":["url"],
 	"DOI":["DOI"],
 	"ISBN":["ISBN"],
 	"ISSN":["ISSN"],
 	"call-number":["callNumber", "applicationNumber"],
 	"note":["extra"],
 	"number":["number"],
 	"chapter-number":["session"],
 	"references":["history", "references"],
 	"shortTitle":["shortTitle"],
 	"journalAbbreviation":["journalAbbreviation"],
 	"status":["legalStatus"],
 	"language":["language"]
 }
 
 /*
  * Mappings for dates
  */
 var CSL_DATE_MAPPINGS = {
 	"issued":"date",
 	"accessed":"accessDate",
 	"submitted":"filingDate"
 }
 
 /*
  * Mappings for types
  * Also see itemFromCSLJSON
  */
 var CSL_TYPE_MAPPINGS = {
 	'book':"book",
 	'bookSection':'chapter',
 	'journalArticle':"article-journal",
 	'magazineArticle':"article-magazine",
 	'newspaperArticle':"article-newspaper",
 	'thesis':"thesis",
 	'encyclopediaArticle':"entry-encyclopedia",
 	'dictionaryEntry':"entry-dictionary",
 	'conferencePaper':"paper-conference",
 	'letter':"personal_communication",
 	'manuscript':"manuscript",
 	'interview':"interview",
 	'film':"motion_picture",
 	'artwork':"graphic",
 	'webpage':"webpage",
 	'report':"report",
 	'bill':"bill",
 	'case':"legal_case",
 	'hearing':"bill",				// ??
 	'patent':"patent",
 	'statute':"legislation",		// ??
 	'email':"personal_communication",
 	'map':"map",
 	'blogPost':"post-weblog",
 	'instantMessage':"personal_communication",
 	'forumPost':"post",
 	'audioRecording':"song",		// ??
 	'presentation':"speech",
 	'videoRecording':"motion_picture",
 	'tvBroadcast':"broadcast",
 	'radioBroadcast':"broadcast",
 	'podcast':"song",			// ??
 	'computerProgram':"book",		// ??
 	'document':"article",
 	'note':"article",
 	'attachment':"article"
 };
 
 /**
  * @class Functions for text manipulation and other miscellaneous purposes
  */
 Zotero.Utilities = {
 	/**
 	 * Cleans extraneous punctuation off a creator name and parse into first and last name
 	 *
 	 * @param {String} author Creator string
 	 * @param {String} type Creator type string (e.g., "author" or "editor")
 	 * @param {Boolean} useComma Whether the creator string is in inverted (Last, First) format
 	 * @return {Object} firstName, lastName, and creatorType
 	 */
 	"cleanAuthor":function(author, type, useComma) {
 		var allCaps = 'A-Z' + 
 									'\u0400-\u042f';		//cyrilic
 
 		var allCapsRe = new RegExp('^[' + allCaps + ']+$');
 		var initialRe = new RegExp('^-?[' + allCaps + ']$');
 
 		if(typeof(author) != "string") {
 			throw "cleanAuthor: author must be a string";
 		}
 
 		author = author.replace(/^[\s\u00A0\.\,\/\[\]\:]+/, '')
 									  .replace(/[\s\u00A0\.\,\/\[\]\:]+$/, '')
 									.replace(/[\s\u00A0]+/, ' ');
 
 		if(useComma) {
 			// Add spaces between periods
 			author = author.replace(/\.([^ ])/, ". $1");
 
 			var splitNames = author.split(/, ?/);
 			if(splitNames.length > 1) {
 				var lastName = splitNames[0];
 				var firstName = splitNames[1];
 			} else {
 				var lastName = author;
 			}
 		} else {
 			// Don't parse "Firstname Lastname [Country]" as "[Country], Firstname Lastname"
 			var spaceIndex = author.length;
 			do {
 				spaceIndex = author.lastIndexOf(" ", spaceIndex-1);
 				var lastName = author.substring(spaceIndex + 1);
 				var firstName = author.substring(0, spaceIndex);
 			} while (!Zotero.Utilities.XRegExp('\\pL').test(lastName[0]) && spaceIndex > 0)
 		}
 
 		if(firstName && allCapsRe.test(firstName) &&
 				firstName.length < 4 &&
 				(firstName.length == 1 || lastName.toUpperCase() != lastName)) {
 			// first name is probably initials
 			var newFirstName = "";
 			for(var i=0; i<firstName.length; i++) {
 				newFirstName += " "+firstName[i]+".";
 			}
 			firstName = newFirstName.substr(1);
 		}
 
 		//add periods after all the initials
 		if(firstName) {
 			var names = firstName.replace(/^[\s\.]+/,'')
 						.replace(/[\s\,]+$/,'')
 						//remove spaces surronding any dashes
 						.replace(/\s*([\u002D\u00AD\u2010-\u2015\u2212\u2E3A\u2E3B])\s*/,'-')
 						.split(/(?:[\s\.]+|(?=-))/);
 			var newFirstName = '';
 			for(var i=0, n=names.length; i<n; i++) {
 				newFirstName += names[i];
 				if(initialRe.test(names[i])) newFirstName += '.';
 				newFirstName += ' ';
 			}
 			firstName = newFirstName.replace(/ -/g,'-').trim();
 		}
 
 		return {firstName:firstName, lastName:lastName, creatorType:type};
 	},
 	
 	/**
 	 * Removes leading and trailing whitespace from a string
 	 * @type String
 	 */
 	"trim":function(/**String*/ s) {
 		if (typeof(s) != "string") {
 			throw "trim: argument must be a string";
 		}
 		
 		s = s.replace(/^\s+/, "");
 		return s.replace(/\s+$/, "");
 	},
 
 	/**
 	 * Cleans whitespace off a string and replaces multiple spaces with one
 	 * @type String
 	 */
 	"trimInternal":function(/**String*/ s) {
 		if (typeof(s) != "string") {
 			throw new Error("trimInternal: argument must be a string");
 		}
 		
 		s = s.replace(/[\xA0\r\n\s]+/g, " ");
 		return this.trim(s);
 	},
 
 	/**
 	 * Cleans any non-word non-parenthesis characters off the ends of a string
 	 * @type String
 	 */
 	"superCleanString":function(/**String*/ x) {
 		if(typeof(x) != "string") {
 			throw "superCleanString: argument must be a string";
 		}
 		
 		var x = x.replace(/^[\x00-\x27\x29-\x2F\x3A-\x40\x5B-\x60\x7B-\x7F\s]+/, "");
 		return x.replace(/[\x00-\x28\x2A-\x2F\x3A-\x40\x5B-\x60\x7B-\x7F\s]+$/, "");
 	},
 
 	/**
 	 * Cleans a http url string
 	 * @param url {String}
 	 * @params tryHttp {Boolean} Attempt prepending 'http://' to the url
 	 * @returns {String}
 	 */
 	cleanURL: function(url, tryHttp=false) {
 		url = url.trim();
 		if (!url) return false;
 		
 		var ios = Components.classes["@mozilla.org/network/io-service;1"]
 			.getService(Components.interfaces.nsIIOService);
 		try {
 			return ios.newURI(url, null, null).spec; // Valid URI if succeeds
 		} catch (e) {
 			if (e instanceof Components.Exception
 				&& e.result == Components.results.NS_ERROR_MALFORMED_URI
 			) {
 				if (tryHttp && /\w\.\w/.test(url)) {
 					// Assume it's a URL missing "http://" part
 					try {
 						return ios.newURI('http://' + url, null, null).spec;
 					} catch (e) {}
 				}
 				
 				Zotero.debug('cleanURL: Invalid URI: ' + url, 2);
 				return false;
 			}
 			throw e;
 		}
 	},
 	
 	/**
 	 * Eliminates HTML tags, replacing &lt;br&gt;s with newlines
 	 * @type String
 	 */
 	"cleanTags":function(/**String*/ x) {
 		if(typeof(x) != "string") {
 			throw "cleanTags: argument must be a string";
 		}
 		
 		x = x.replace(/<br[^>]*>/gi, "\n");
 		x = x.replace(/<\/p>/gi, "\n\n");
 		return x.replace(/<[^>]+>/g, "");
 	},
 
 	/**
 	 * Strip info:doi prefix and any suffixes from a DOI
 	 * @type String
 	 */
 	"cleanDOI":function(/**String**/ x) {
 		if(typeof(x) != "string") {
 			throw "cleanDOI: argument must be a string";
 		}
 
 		var doi = x.match(/10(?:\.[0-9]{4,})?\/[^\s]*[^\s\.,]/);
 		return doi ? doi[0] : null;
 	},
 
 	/**
 	 * Clean and validate ISBN.
 	 * Return isbn if valid, otherwise return false
 	 * @param {String} isbn
 	 * @param {Boolean} [dontValidate=false] Do not validate check digit
 	 * @return {String|Boolean} Valid ISBN or false
 	 */
 	"cleanISBN":function(isbnStr, dontValidate) {
 		isbnStr = isbnStr.toUpperCase()
 			.replace(/[\x2D\xAD\u2010-\u2015\u2043\u2212]+/g, ''); // Ignore dashes
 		var isbnRE = /\b(?:97[89]\s*(?:\d\s*){9}\d|(?:\d\s*){9}[\dX])\b/g,
 			isbnMatch;
 		while(isbnMatch = isbnRE.exec(isbnStr)) {
 			var isbn = isbnMatch[0].replace(/\s+/g, '');
 			
 			if (dontValidate) {
 				return isbn;
 			}
 			
 			if(isbn.length == 10) {
 				// Verify ISBN-10 checksum
 				var sum = 0;
 				for (var i = 0; i < 9; i++) {
 					sum += isbn[i] * (10-i);
 				}
 				//check digit might be 'X'
 				sum += (isbn[9] == 'X')? 10 : isbn[9]*1;
 	
 				if (sum % 11 == 0) return isbn;
 			} else {
 				// Verify ISBN 13 checksum
 				var sum = 0;
 				for (var i = 0; i < 12; i+=2) sum += isbn[i]*1;	//to make sure it's int
 				for (var i = 1; i < 12; i+=2) sum += isbn[i]*3;
 				sum += isbn[12]*1; //add the check digit
 	
 				if (sum % 10 == 0 ) return isbn;
 			}
 			
 			isbnRE.lastIndex = isbnMatch.index + 1; // Retry the same spot + 1
 		}
 		
 		return false;
 	},
 	
 	/*
 	 * Convert ISBN 10 to ISBN 13
 	 * @param {String} isbn ISBN 10 or ISBN 13
 	 *   cleanISBN
 	 * @return {String} ISBN-13
 	 */
 	"toISBN13": function(isbnStr) {
 		var isbn;
 		if (!(isbn = Zotero.Utilities.cleanISBN(isbnStr, true))) {
 			throw new Error('ISBN not found in "' + isbnStr + '"');
 		}
 		
 		if (isbn.length == 13) {
 			isbn = isbn.substr(0,12); // Strip off check digit and re-calculate it
 		} else {
 			isbn = '978' + isbn.substr(0,9);
 		}
 		
 		var sum = 0;
 		for (var i = 0; i < 12; i++) {
 			sum += isbn[i] * (i%2 ? 3 : 1);
 		}
 		
 		var checkDigit = 10 - (sum % 10);
 		if (checkDigit == 10) checkDigit = 0;
 		
 		return isbn + checkDigit;
 	},
 
 	/**
 	 * Clean and validate ISSN.
 	 * Return issn if valid, otherwise return false
 	 */
 	"cleanISSN":function(/**String*/ issnStr) {
 		issnStr = issnStr.toUpperCase()
 			.replace(/[\x2D\xAD\u2010-\u2015\u2043\u2212]+/g, ''); // Ignore dashes
 		var issnRE = /\b(?:\d\s*){7}[\dX]\b/g,
 			issnMatch;
 		while (issnMatch = issnRE.exec(issnStr)) {
 			var issn = issnMatch[0].replace(/\s+/g, '');
 			
 			// Verify ISSN checksum
 			var sum = 0;
 			for (var i = 0; i < 7; i++) {
 				sum += issn[i] * (8-i);
 			}
 			//check digit might be 'X'
 			sum += (issn[7] == 'X')? 10 : issn[7]*1;
 	
 			if (sum % 11 == 0) {
 				return issn.substring(0,4) + '-' + issn.substring(4);
 			}
 			
 			issnRE.lastIndex = issnMatch.index + 1; // Retry same spot + 1
 		}
 		
 		return false;
 	},
 	
 	/**
 	 * Convert plain text to HTML by replacing special characters and replacing newlines with BRs or
 	 * P tags
 	 * @param {String} str Plain text string
 	 * @param {Boolean} singleNewlineIsParagraph Whether single newlines should be considered as
 	 *     paragraphs. If true, each newline is replaced with a P tag. If false, double newlines
 	 *     are replaced with P tags, while single newlines are replaced with BR tags.
 	 * @type String
 	 */
 	"text2html":function (/**String**/ str, /**Boolean**/ singleNewlineIsParagraph) {
 		str = Zotero.Utilities.htmlSpecialChars(str);
 		
 		// \n => <p>
 		if (singleNewlineIsParagraph) {
 			str = '<p>'
 					+ str.replace(/\n/g, '</p><p>')
 						.replace(/  /g, '&nbsp; ')
 				+ '</p>';
 		}
 		// \n\n => <p>, \n => <br/>
 		else {
 			str = '<p>'
 					+ str.replace(/\n\n/g, '</p><p>')
 						.replace(/\n/g, '<br/>')
 						.replace(/  /g, '&nbsp; ')
 				+ '</p>';
 		}
 		return str.replace(/<p>\s*<\/p>/g, '<p>&nbsp;</p>');
 	},
 
 	/**
 	 * Encode special XML/HTML characters
 	 * Certain entities can be inserted manually:
 	 *   <ZOTEROBREAK/> => <br/>
 	 *   <ZOTEROHELLIP/> => &#8230;
 	 *
 	 * @param {String} str
 	 * @return {String}
 	 */
 	"htmlSpecialChars":function(str) {
 		if (str && typeof str != 'string') {
 			Zotero.debug('#htmlSpecialChars: non-string arguments are deprecated. Update your code',
 				1, undefined, true);
 			str = str.toString();
 		}
 		
 		if (!str) return '';
 		
 		return str
 			.replace(/&/g, '&amp;')
 			.replace(/"/g, '&quot;')
 			.replace(/'/g, '&apos;')
 			.replace(/</g, '&lt;')
 			.replace(/>/g, '&gt;')
 			.replace(/&lt;ZOTERO([^\/]+)\/&gt;/g, function (str, p1, offset, s) {
 			switch (p1) {
 				case 'BREAK':
 					return '<br/>';
 				case 'HELLIP':
 					return '&#8230;';
 				default:
 					return p1;
 			}
 		});
 	},
 
 	/**
 	 * Decodes HTML entities within a string, returning plain text
 	 * @type String
 	 */
 	"unescapeHTML":new function() {
 		var nsIScriptableUnescapeHTML, node;
 		
 		return function(/**String*/ str) {
 			// If no tags, no need to unescape
 			if(str.indexOf("<") === -1 && str.indexOf("&") === -1) return str;
 			
 			if(Zotero.isFx && !Zotero.isBookmarklet) {
 				// Create a node and use the textContent property to do unescaping where
 				// possible, because this approach preserves line endings in the HTML
 				if(node === undefined) {
 					node = Zotero.Utilities.Internal.getDOMDocument().createElement("div");
 				}
 				
 				node.innerHTML = str;
 				return node.textContent.replace(/ {2,}/g, " ");
 			} else if(Zotero.isNode) {
 				/*var doc = require('jsdom').jsdom(str, null, {
 					"features":{
 						"FetchExternalResources":false,
 						"ProcessExternalResources":false,
 						"MutationEvents":false,
 						"QuerySelector":false
 					}
 				});
 				if(!doc.documentElement) return str;
 				return doc.documentElement.textContent;*/
 				return Zotero.Utilities.cleanTags(str);
 			} else {
 				if(!node) node = document.createElement("div");
 				node.innerHTML = str;
 				return ("textContent" in node ? node.textContent : node.innerText).replace(/ {2,}/g, " ");
 			}
 		};
 	},
 	
 	/**
 	 * Converts text inside a DOM object to plain text preserving text formatting
 	 * appropriate for given field
 	 * 
 	 * @param {DOMNode} rootNode Node containing all the text that needs to be extracted
 	 * @param {String} targetField Zotero item field that the text is meant for
 	 *
 	 * @return {String} Zotero formatted string
 	 */
 	"dom2text": function(rootNode, targetField) {
 		// TODO: actually do this
 		return Zotero.Utilities.trimInternal(rootNode.textContent);
 	},
 	
 	/**
 	 * Wrap URLs and DOIs in <a href=""> links in plain text
 	 *
 	 * Ignore URLs preceded by '>', just in case there are already links
 	 * @type String
 	 */
 	"autoLink":function (/**String**/ str) {
 		// "http://www.google.com."
 		// "http://www.google.com. "
 		// "<http://www.google.com>" (and other characters, with or without a space after)
 		str = str.replace(/([^>])(https?:\/\/[^\s]+)([\."'>:\]\)](\s|$))/g, '$1<a href="$2">$2</a>$3');
 		// "http://www.google.com"
 		// "http://www.google.com "
 		str = str.replace(/([^">])(https?:\/\/[^\s]+)(\s|$)/g, '$1<a href="$2">$2</a>$3');
 		
 		// DOI
 		str = str.replace(/(doi:[ ]*)(10\.[^\s]+[0-9a-zA-Z])/g, '$1<a href="http://dx.doi.org/$2">$2</a>');
 		return str;
 	},
 	
 	/**
 	 * Parses a text string for HTML/XUL markup and returns an array of parts. Currently only finds
 	 * HTML links (&lt;a&gt; tags)
 	 *
 	 * @return {Array} An array of objects with the following form:<br>
 	 * <pre>   {
 	 *         type: 'text'|'link',
 	 *         text: "text content",
 	 *         [ attributes: { key1: val [ , key2: val, ...] }
 	 *    }</pre>
 	 */
 	"parseMarkup":function(/**String*/ str) {
 		var parts = [];
 		var splits = str.split(/(<a [^>]+>[^<]*<\/a>)/);
 		
 		for(var i=0; i<splits.length; i++) {
 			// Link
 			if (splits[i].indexOf('<a ') == 0) {
 				var matches = splits[i].match(/<a ([^>]+)>([^<]*)<\/a>/);
 				if (matches) {
 					// Attribute pairs
 					var attributes = {};
 					var pairs = matches[1].match(/([^ =]+)="([^"]+")/g);
 					for(var j=0; j<pairs.length; j++) {
 						var keyVal = pairs[j].split(/=/);
 						attributes[keyVal[0]] = keyVal[1].substr(1, keyVal[1].length - 2);
 					}
 					
 					parts.push({
 						type: 'link',
 						text: matches[2],
 						attributes: attributes
 					});
 					continue;
 				}
 			}
 			
 			parts.push({
 				type: 'text',
 				text: splits[i]
 			});
 		}
 		
 		return parts;
 	},
 	
 	/**
 	 * Calculates the Levenshtein distance between two strings
 	 * @type Number
 	 */
 	"levenshtein":function (/**String*/ a, /**String**/ b) {
 		var aLen = a.length;
 		var bLen = b.length;
 		
 		var arr = new Array(aLen+1);
 		var i, j, cost;
 		
 		for (i = 0; i <= aLen; i++) {
 			arr[i] = new Array(bLen);
 			arr[i][0] = i;
 		}
 		
 		for (j = 0; j <= bLen; j++) {
 			arr[0][j] = j;
 		}
 		
 		for (i = 1; i <= aLen; i++) {
 			for (j = 1; j <= bLen; j++) {
 				cost = (a[i-1] == b[j-1]) ? 0 : 1;
 				arr[i][j] = Math.min(arr[i-1][j] + 1, Math.min(arr[i][j-1] + 1, arr[i-1][j-1] + cost));
 			}
 		}
 		
 		return arr[aLen][bLen];
 	},
 	
 	/**
 	 * Test if an object is empty
 	 *
 	 * @param {Object} obj
 	 * @type Boolean
 	 */
 	"isEmpty":function (obj) {
 		for (var i in obj) {
 			return false;
 		}
 		return true;
 	},
 
 	/**
 	 * Compares an array with another and returns an array with
 	 *	the values from array1 that don't exist in array2
 	 *
 	 * @param	{Array}		array1
 	 * @param	{Array}		array2
 	 * @param	{Boolean}	useIndex		If true, return an array containing just
 	 *										the index of array2's elements;
 	 *										otherwise return the values
 	 */
 	"arrayDiff":function(array1, array2, useIndex) {
 		if (!Array.isArray(array1)) {
 			throw new Error("array1 is not an array (" + array1 + ")");
 		}
 		if (!Array.isArray(array2)) {
 			throw new Error("array2 is not an array (" + array2 + ")");
 		}
 		
 		var val, pos, vals = [];
 		for (var i=0; i<array1.length; i++) {
 			val = array1[i];
 			pos = array2.indexOf(val);
 			if (pos == -1) {
 				vals.push(useIndex ? pos : val);
 			}
 		}
 		return vals;
 	},
 	
 	
 	/**
 	 * Determine whether two arrays are identical
 	 *
 	 * Modified from http://stackoverflow.com/a/14853974
 	 *
 	 * @return {Boolean} 
 	 */
 	"arrayEquals": function (array1, array2) {
 		// If either array is a falsy value, return
 		if (!array1 || !array2)
 			return false;
 	
 		// Compare lengths - can save a lot of time
 		if (array1.length != array2.length)
 			return false;
 	
 		for (var i = 0, l=array1.length; i < l; i++) {
 			// Check if we have nested arrays
 			if (array1[i] instanceof Array && array2[i] instanceof Array) {
 				// Recurse into the nested arrays
 				if (!this.arrayEquals(array1[i], array2[i])) {
 					return false;
 				}
 			}
 			else if (array1[i] != array2[i]) {
 				// Warning - two different object instances will never be equal: {x:20} != {x:20}
 				return false;
 			}
 		}
 		return true;
 	},
 	
 	
 	/**
 	 * Return new array with values shuffled
 	 *
 	 * From http://stackoverflow.com/a/6274398
 	 *
 	 * @param {Array} arr
 	 * @return {Array}
 	 */
 	"arrayShuffle": function (array) {
 		var counter = array.length, temp, index;
 		
 		// While there are elements in the array
 		while (counter--) {
 			// Pick a random index
 			index = (Math.random() * counter) | 0;
 			
 			// And swap the last element with it
 			temp = array[counter];
 			array[counter] = array[index];
 			array[index] = temp;
 		}
 		
 		return array;
 	},
 	
 	
 	/**
 	 * Return new array with duplicate values removed
 	 *
 	 * @param	{Array}		array
 	 * @return	{Array}
 	 */
 	arrayUnique: function (arr) {
 		return [...new Set(arr)];
 	},
 	
 	/**
 	 * Run a function on chunks of a given size of an array's elements.
 	 *
 	 * @param {Array} arr
 	 * @param {Integer} chunkSize
 	 * @param {Function} func
 	 * @return {Array} The return values from the successive runs
 	 */
 	"forEachChunk":function(arr, chunkSize, func) {
 		var retValues = [];
 		var tmpArray = arr.concat();
 		var num = arr.length;
 		var done = 0;
 		
 		do {
 			var chunk = tmpArray.splice(0, chunkSize);
 			done += chunk.length;
 			retValues.push(func(chunk));
 		}
 		while (done < num);
 		
 		return retValues;
 	},
 	
 	/**
 	 * Assign properties to an object
 	 *
 	 * @param {Object} target
 	 * @param {Object} source
 	 * @param {String[]} [props] Properties to assign. Assign all otherwise
 	 */
 	"assignProps": function(target, source, props) {
 		if (!props) props = Object.keys(source);
 		
 		for (var i=0; i<props.length; i++) {
 			if (source[props[i]] === undefined) continue;
 			target[props[i]] = source[props[i]];
 		}
 	},
 	
 	/**
 	 * Generate a random integer between min and max inclusive
 	 *
 	 * @param	{Integer}	min
 	 * @param	{Integer}	max
 	 * @return	{Integer}
 	 */
 	"rand":function (min, max) {
 		return Math.floor(Math.random() * (max - min + 1)) + min;
 	},
 
 	/**
 	 * Parse a page range
 	 *
 	 * @param {String} Page range to parse
 	 * @return {Integer[]} Start and end pages
 	 */
 	"getPageRange":function(pages) {
 		const pageRangeRegexp = /^\s*([0-9]+) ?[-\u2013] ?([0-9]+)\s*$/
 		
 		var pageNumbers;
 		var m = pageRangeRegexp.exec(pages);
 		if(m) {
 			// A page range
 			pageNumbers = [m[1], m[2]];
 		} else {
 			// Assume start and end are the same
 			pageNumbers = [pages, pages];
 		}
 		return pageNumbers;
 	},
 
 	/**
 	 * Pads a number or other string with a given string on the left
 	 *
 	 * @param {String} string String to pad
 	 * @param {String} pad String to use as padding
 	 * @length {Integer} length Length of new padded string
 	 * @type String
 	 */
 	"lpad":function(string, pad, length) {
 		string = string ? string + '' : '';
 		while(string.length < length) {
 			string = pad + string;
 		}
 		return string;
 	},
 
 	/**
 	 * Shorten and add an ellipsis to a string if necessary
 	 *
 	 * @param {String}	str
 	 * @param {Integer}	len
 	 * @param {Boolean} [wordBoundary=false]
 	 * @param {Boolean} [countChars=false]
 	 */
 	ellipsize: function (str, len, wordBoundary = false, countChars) {
 		if (!len) {
 			throw ("Length not specified in Zotero.Utilities.ellipsize()");
 		}
 		if (str.length <= len) {
 			return str;
 		}
 		let radius = Math.min(len, 5);
 		if (wordBoundary) {
 			let min = len - radius;
 			// If next character is a space, include that so we stop at len
 			if (str.charAt(len).match(/\s/)) {
 				radius++;
 			}
 			// Remove trailing characters and spaces, up to radius
 			str = str.substr(0, min) + str.substr(min, radius).replace(/\W*\s\S*$/, "");
 		}
 		else {
 			str = str.substr(0, len)
 		}
 		return str + '\u2026' + (countChars ? ' (' + str.length + ' chars)' : '');
 	},
 	
 	
 	/**
 	 * Return the proper plural form of a string
 	 *
 	 * For now, this is only used for debug output in English.
 	 *
 	 * @param {Integer} num
 	 * @param {String[]|String} forms - If an array, an array of plural forms (e.g., ['object', 'objects']);
 	 *     currently only the two English forms are supported, for 1 and 0/many. If a single string,
 	 *     's' is added automatically for 0/many.
 	 * @return {String}
 	 */
 	pluralize: function (num, forms) {
 		if (typeof forms == 'string') {
 			forms = [forms, forms + 's'];
 		}
 		return num == 1 ? forms[0] : forms[1];
 	},
 	
 	
 	/**
 	  * Port of PHP's number_format()
 	  *
 	  * MIT Licensed
 	  *
 	  * From http://kevin.vanzonneveld.net
 	  * +   original by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
 	  * +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
 	  * +     bugfix by: Michael White (http://getsprink.com)
 	  * +     bugfix by: Benjamin Lupton
 	  * +     bugfix by: Allan Jensen (http://www.winternet.no)
 	  * +    revised by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
 	  * +     bugfix by: Howard Yeend
 	  * *     example 1: number_format(1234.5678, 2, '.', '');
 	  * *     returns 1: 1234.57
 	 */
 	"numberFormat":function (number, decimals, dec_point, thousands_sep) {
 		var n = number, c = isNaN(decimals = Math.abs(decimals)) ? 2 : decimals;
 		var d = dec_point == undefined ? "." : dec_point;
 		var t = thousands_sep == undefined ? "," : thousands_sep, s = n < 0 ? "-" : "";
 		var i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "", j = (j = i.length) > 3 ? j % 3 : 0;
 		
 		return s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
 	},
 
 	/**
 	 * Cleans a title, converting it to title case and replacing " :" with ":"
 	 *
 	 * @param {String} string
 	 * @param {Boolean} force Forces title case conversion, even if the capitalizeTitles pref is off
 	 * @type String
 	 */
 	"capitalizeTitle":function(string, force) {
 		const skipWords = ["but", "or", "yet", "so", "for", "and", "nor", "a", "an",
 			"the", "at", "by", "from", "in", "into", "of", "on", "to", "with", "up",
 			"down", "as"];
 		
 		// this may only match a single character
 		const delimiterRegexp = /([ \/\u002D\u00AD\u2010-\u2015\u2212\u2E3A\u2E3B])/;
 		
 		string = this.trimInternal(string);
 		string = string.replace(/ : /g, ": ");
 		if(force === false || (!Zotero.Prefs.get('capitalizeTitles') && !force)) return string;
 		if(!string) return "";
 		
 		// split words
 		var words = string.split(delimiterRegexp);
 		var isUpperCase = string.toUpperCase() == string;
 		
 		var newString = "";
 		var delimiterOffset = words[0].length;
 		var lastWordIndex = words.length-1;
 		var previousWordIndex = -1;
 		for(var i=0; i<=lastWordIndex; i++) {
 			// only do manipulation if not a delimiter character
 			if(words[i].length != 0 && (words[i].length != 1 || !delimiterRegexp.test(words[i]))) {
 				var upperCaseVariant = words[i].toUpperCase();
 				var lowerCaseVariant = words[i].toLowerCase();
 				
 				// only use if word does not already possess some capitalization
 				if(isUpperCase || words[i] == lowerCaseVariant) {
 					if(
 						// a skip word
 						skipWords.indexOf(lowerCaseVariant.replace(/[^a-zA-Z]+/, "")) != -1
 						// not first or last word
 						&& i != 0 && i != lastWordIndex
 						// does not follow a colon
 						&& (previousWordIndex == -1 || words[previousWordIndex][words[previousWordIndex].length-1].search(/[:\?!]/)==-1)
 					) {
 						words[i] = lowerCaseVariant;
 					} else {
 						// this is not a skip word or comes after a colon;
 						// we must capitalize
 						// handle punctuation in the beginning, including multiple, as in "¿Qué pasa?"		
 						var punct = words[i].match(/^[\'\"¡¿“‘„«\s]+/);
 						punct = punct ? punct[0].length+1 : 1;
 						words[i] = words[i].length ? words[i].substr(0, punct).toUpperCase() +
 							words[i].substr(punct).toLowerCase() : words[i];
 					}
 				}
 				
 				previousWordIndex = i;
 			}
 			
 			newString += words[i];
 		}
 		
 		return newString;
 	},
 	
 	"capitalize": function (str) {
 		if (typeof str != 'string') throw new Error("Argument must be a string");
 		if (!str) return str; // Empty string
 		return str[0].toUpperCase() + str.substr(1);
 	},
 	
 	/**
 	 * Replaces accented characters in a string with ASCII equivalents
 	 *
 	 * @param {String} str
 	 * @param {Boolean} [lowercaseOnly]  Limit conversions to lowercase characters
 	 *                                   (for improved performance on lowercase input)
 	 * @return {String}
 	 *
 	 * From http://lehelk.com/2011/05/06/script-to-remove-diacritics/
 	 */
 	"removeDiacritics": function (str, lowercaseOnly) {
 		// Short-circuit on the most basic input
 		if (/^[a-zA-Z0-9_-]*$/.test(str)) return str;
 
 		var map = this._diacriticsRemovalMap.lowercase;
 		for (var i=0, len=map.length; i<len; i++) {
 			str = str.replace(map[i].letters, map[i].base);
 		}
 		
 		if (!lowercaseOnly) {
 			var map = this._diacriticsRemovalMap.uppercase;
 			for (var i=0, len=map.length; i<len; i++) {
 				str = str.replace(map[i].letters, map[i].base);
 			}
 		}
 		
 		return str;
 	},
 	
 	"_diacriticsRemovalMap": {
 		uppercase: [
 			{'base':'A', 'letters':/[\u0041\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F]/g},
 			{'base':'AA','letters':/[\uA732]/g},
 			{'base':'AE','letters':/[\u00C6\u01FC\u01E2]/g},
 			{'base':'AO','letters':/[\uA734]/g},
 			{'base':'AU','letters':/[\uA736]/g},
 			{'base':'AV','letters':/[\uA738\uA73A]/g},
 			{'base':'AY','letters':/[\uA73C]/g},
 			{'base':'B', 'letters':/[\u0042\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0182\u0181]/g},
 			{'base':'C', 'letters':/[\u0043\u24B8\uFF23\u0106\u0108\u010A\u010C\u00C7\u1E08\u0187\u023B\uA73E]/g},
 			{'base':'D', 'letters':/[\u0044\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018B\u018A\u0189\uA779]/g},
 			{'base':'DZ','letters':/[\u01F1\u01C4]/g},
 			{'base':'Dz','letters':/[\u01F2\u01C5]/g},
 			{'base':'E', 'letters':/[\u0045\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E]/g},
 			{'base':'F', 'letters':/[\u0046\u24BB\uFF26\u1E1E\u0191\uA77B]/g},
 			{'base':'G', 'letters':/[\u0047\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E]/g},
 			{'base':'H', 'letters':/[\u0048\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D]/g},
 			{'base':'I', 'letters':/[\u0049\u24BE\uFF29\u00CC\u00CD\u00CE\u0128\u012A\u012C\u0130\u00CF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197]/g},
 			{'base':'J', 'letters':/[\u004A\u24BF\uFF2A\u0134\u0248]/g},
 			{'base':'K', 'letters':/[\u004B\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2]/g},
 			{'base':'L', 'letters':/[\u004C\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780]/g},
 			{'base':'LJ','letters':/[\u01C7]/g},
 			{'base':'Lj','letters':/[\u01C8]/g},
 			{'base':'M', 'letters':/[\u004D\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C]/g},
 			{'base':'N', 'letters':/[\u004E\u24C3\uFF2E\u01F8\u0143\u00D1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u0220\u019D\uA790\uA7A4]/g},
 			{'base':'NJ','letters':/[\u01CA]/g},
 			{'base':'Nj','letters':/[\u01CB]/g},
 			{'base':'O', 'letters':/[\u004F\u24C4\uFF2F\u00D2\u00D3\u00D4\u1ED2\u1ED0\u1ED6\u1ED4\u00D5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\u00D6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\u00D8\u01FE\u0186\u019F\uA74A\uA74C]/g},
 			{'base':'OE','letters':/[\u0152]/g},
 			{'base':'OI','letters':/[\u01A2]/g},
 			{'base':'OO','letters':/[\uA74E]/g},
 			{'base':'OU','letters':/[\u0222]/g},
 			{'base':'P', 'letters':/[\u0050\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754]/g},
 			{'base':'Q', 'letters':/[\u0051\u24C6\uFF31\uA756\uA758\u024A]/g},
 			{'base':'R', 'letters':/[\u0052\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782]/g},
 			{'base':'S', 'letters':/[\u0053\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784]/g},
 			{'base':'T', 'letters':/[\u0054\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786]/g},
 			{'base':'TZ','letters':/[\uA728]/g},
 			{'base':'U', 'letters':/[\u0055\u24CA\uFF35\u00D9\u00DA\u00DB\u0168\u1E78\u016A\u1E7A\u016C\u00DC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244]/g},
 			{'base':'V', 'letters':/[\u0056\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245]/g},
 			{'base':'VY','letters':/[\uA760]/g},
 			{'base':'W', 'letters':/[\u0057\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72]/g},
 			{'base':'X', 'letters':/[\u0058\u24CD\uFF38\u1E8A\u1E8C]/g},
 			{'base':'Y', 'letters':/[\u0059\u24CE\uFF39\u1EF2\u00DD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE]/g},
 			{'base':'Z', 'letters':/[\u005A\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762]/g},
 		],
 		
 		lowercase: [
 			{'base':'a', 'letters':/[\u0061\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250]/g},
 			{'base':'aa','letters':/[\uA733]/g},
 			{'base':'ae','letters':/[\u00E6\u01FD\u01E3]/g},
 			{'base':'ao','letters':/[\uA735]/g},
 			{'base':'au','letters':/[\uA737]/g},
 			{'base':'av','letters':/[\uA739\uA73B]/g},
 			{'base':'ay','letters':/[\uA73D]/g},
 			{'base':'b', 'letters':/[\u0062\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253]/g},
 			{'base':'c', 'letters':/[\u0063\u24D2\uFF43\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184]/g},
 			{'base':'d', 'letters':/[\u0064\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\uA77A]/g},
 			{'base':'dz','letters':/[\u01F3\u01C6]/g},
 			{'base':'e', 'letters':/[\u0065\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u025B\u01DD]/g},
 			{'base':'f', 'letters':/[\u0066\u24D5\uFF46\u1E1F\u0192\uA77C]/g},
 			{'base':'g', 'letters':/[\u0067\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\u1D79\uA77F]/g},
 			{'base':'h', 'letters':/[\u0068\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265]/g},
 			{'base':'hv','letters':/[\u0195]/g},
 			{'base':'i', 'letters':/[\u0069\u24D8\uFF49\u00EC\u00ED\u00EE\u0129\u012B\u012D\u00EF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131]/g},
 			{'base':'j', 'letters':/[\u006A\u24D9\uFF4A\u0135\u01F0\u0249]/g},
 			{'base':'k', 'letters':/[\u006B\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3]/g},
 			{'base':'l', 'letters':/[\u006C\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747]/g},
 			{'base':'lj','letters':/[\u01C9]/g},
 			{'base':'m', 'letters':/[\u006D\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F]/g},
 			{'base':'n', 'letters':/[\u006E\u24DD\uFF4E\u01F9\u0144\u00F1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5]/g},
 			{'base':'nj','letters':/[\u01CC]/g},
 			{'base':'o', 'letters':/[\u006F\u24DE\uFF4F\u00F2\u00F3\u00F4\u1ED3\u1ED1\u1ED7\u1ED5\u00F5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\u00F6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\u00F8\u01FF\u0254\uA74B\uA74D\u0275]/g},
 			{'base':'oe','letters':/[\u0153]/g},
 			{'base':'oi','letters':/[\u01A3]/g},
 			{'base':'ou','letters':/[\u0223]/g},
 			{'base':'oo','letters':/[\uA74F]/g},
 			{'base':'p','letters':/[\u0070\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755]/g},
 			{'base':'q','letters':/[\u0071\u24E0\uFF51\u024B\uA757\uA759]/g},
 			{'base':'r','letters':/[\u0072\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783]/g},
 			{'base':'s','letters':/[\u0073\u24E2\uFF53\u00DF\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B]/g},
 			{'base':'t','letters':/[\u0074\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787]/g},
 			{'base':'tz','letters':/[\uA729]/g},
 			{'base':'u','letters':/[\u0075\u24E4\uFF55\u00F9\u00FA\u00FB\u0169\u1E79\u016B\u1E7B\u016D\u00FC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289]/g},
 			{'base':'v','letters':/[\u0076\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C]/g},
 			{'base':'vy','letters':/[\uA761]/g},
 			{'base':'w','letters':/[\u0077\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73]/g},
 			{'base':'x','letters':/[\u0078\u24E7\uFF58\u1E8B\u1E8D]/g},
 			{'base':'y','letters':/[\u0079\u24E8\uFF59\u1EF3\u00FD\u0177\u1EF9\u0233\u1E8F\u00FF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF]/g},
 			{'base':'z','letters':/[\u007A\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763]/g}
 		]
 	},
 	
 	/**
 	 * Run sets of data through multiple asynchronous callbacks
 	 *
 	 * Each callback is passed the current set and a callback to call when done
 	 *
 	 * @param	{Object[]}		sets			Sets of data
 	 * @param	{Function[]}	callbacks
 	 * @param	{Function}		onDone			Function to call when done
 	 */
 	 "processAsync":function (sets, callbacks, onDone) {
 		if(sets.wrappedJSObject) sets = sets.wrappedJSObject;
 		if(callbacks.wrappedJSObject) callbacks = callbacks.wrappedJSObject;
 
 		var currentSet;
 		var index = 0;
 		
 		var nextSet = function () {
 			if (!sets.length) {
 				onDone();
 				return;
 			}
 			index = 0;
 			currentSet = sets.shift();
 			callbacks[0](currentSet, nextCallback);
 		};
 		var nextCallback = function () {
 			index++;
 			callbacks[index](currentSet, nextCallback);
 		};
 		
 		// Add a final callback to proceed to the next set
 		callbacks[callbacks.length] = function () {
 			nextSet();
 		}
 		nextSet();
 	},
 	
 	/**
 	 * Performs a deep copy of a JavaScript object
 	 * @param {Object} obj
 	 * @return {Object}
 	 */
 	"deepCopy":function(obj) {
 		var obj2 = (obj instanceof Array ? [] : {});
 		for(var i in obj) {
 			if(!obj.hasOwnProperty(i)) continue;
 			
 			if(typeof obj[i] === "object" && obj[i] !== null) {
 				obj2[i] = Zotero.Utilities.deepCopy(obj[i]);
 			} else {
 				obj2[i] = obj[i];
 			}
 		}
 		return obj2;
 	},
 	
 	/**
 	 * Tests if an item type exists
 	 *
 	 * @param {String} type Item type
 	 * @type Boolean
 	 */
 	"itemTypeExists":function(type) {
 		if(Zotero.ItemTypes.getID(type)) {
 			return true;
 		} else {
 			return false;
 		}
 	},
 	
 	/**
 	 * Find valid creator types for a given item type
 	 *
 	 * @param {String} type Item type
 	 * @return {String[]} Creator types
 	 */
 	"getCreatorsForType":function(type) {
 		if(type === "attachment" || type === "note") return [];
 		var types = Zotero.CreatorTypes.getTypesForItemType(Zotero.ItemTypes.getID(type));
 		var cleanTypes = new Array();
 		for(var i=0; i<types.length; i++) {
 			cleanTypes.push(types[i].name);
 		}
 		return cleanTypes;
 	},
 	
 	/**
 	 * Determine whether a given field is valid for a given item type
 	 *
 	 * @param {String} field Field name
 	 * @param {String} type Item type
 	 * @type Boolean
 	 */
 	"fieldIsValidForType":function(field, type) {
 		return Zotero.ItemFields.isValidForType(field, Zotero.ItemTypes.getID(type));
 	},
 	
 	/**
 	 * Gets a creator type name, localized to the current locale
 	 *
 	 * @param {String} type Creator type
 	 * @param {String} Localized creator type
 	 * @type Boolean
 	 */
 	"getLocalizedCreatorType":function(type) {
 		try {
 			return Zotero.CreatorTypes.getLocalizedString(type);
 		} catch(e) {
 			return false;
 		}
 	},
 	
 	/**
 	 * Escapes metacharacters in a literal so that it may be used in a regular expression
 	 */
 	"quotemeta":function(literal) {
 		if(typeof literal !== "string") {
 			throw "Argument "+literal+" must be a string in Zotero.Utilities.quotemeta()";
 		}
 		const metaRegexp = /[-[\]{}()*+?.\\^$|,#\s]/g;
 		return literal.replace(metaRegexp, "\\$&");
 	},
 	
 	/**
 	 * Evaluate an XPath
 	 *
 	 * @param {element|element[]} elements The element(s) to use as the context for the XPath
 	 * @param {String} xpath The XPath expression
 	 * @param {Object} [namespaces] An object whose keys represent namespace prefixes, and whose
 	 *                              values represent their URIs
 	 * @return {element[]} DOM elements matching XPath
 	 */
 	"xpath":function(elements, xpath, namespaces) {
 		var nsResolver = null;
 		if(namespaces) {
 			nsResolver = function(prefix) {
 				return namespaces[prefix] || null;
 			};
 		}
 		
 		if(!("length" in elements)) elements = [elements];
 		
 		var results = [];
 		for(var i=0, n=elements.length; i<n; i++) {
 			// For some reason, if elements is wrapped by an object
 			// Xray, we won't be able to unwrap the DOMWrapper around
 			// the element. So waive the object Xray.
 			var maybeWrappedEl = elements.wrappedJSObject ? elements.wrappedJSObject[i] : elements[i];
 			
 			// Firefox 5 hack, so we will preserve Fx5DOMWrappers
 			var isWrapped = Zotero.Translate.DOMWrapper && Zotero.Translate.DOMWrapper.isWrapped(maybeWrappedEl);
 			var element = isWrapped ? Zotero.Translate.DOMWrapper.unwrap(maybeWrappedEl) : maybeWrappedEl;
 
 			// We waived the object Xray above, which will waive the
 			// DOM Xray, so make sure we have a DOM Xray wrapper.
 			if(Zotero.isFx) {
 				element = new XPCNativeWrapper(element);
 			}
 			
 			if(element.ownerDocument) {
 				var rootDoc = element.ownerDocument;
 			} else if(element.documentElement) {
 				var rootDoc = element;
 			} else if(Zotero.isIE && element.documentElement === null) {
 				// IE: documentElement may be null if there is a parse error. In this
 				// case, we don't match anything to mimic what would happen with DOMParser
 				continue;
 			} else {
 				throw new Error("First argument must be either element(s) or document(s) in Zotero.Utilities.xpath(elements, '"+xpath+"')");
 			}
 			
 			if(!Zotero.isIE || "evaluate" in rootDoc) {
 				try {
 					// This may result in a deprecation warning in the console due to
 					// https://bugzilla.mozilla.org/show_bug.cgi?id=674437
 					var xpathObject = rootDoc.evaluate(xpath, element, nsResolver, 5 /*ORDERED_NODE_ITERATOR_TYPE*/, null);
 				} catch(e) {
 					// rethrow so that we get a stack
 					throw new Error(e.name+": "+e.message);
 				}
 				
 				var newEl;
 				while(newEl = xpathObject.iterateNext()) {
 					// Firefox 5 hack
 					results.push(isWrapped ? Zotero.Translate.DOMWrapper.wrapIn(newEl, maybeWrappedEl) : newEl);
 				}
 			} else if("selectNodes" in element) {
 				// We use JavaScript-XPath in IE for HTML documents, but with an XML
 				// document, we need to use selectNodes
 				if(namespaces) {
 					var ieNamespaces = [];
 					for(var j in namespaces) {
 						if(!j) continue;
 						ieNamespaces.push('xmlns:'+j+'="'+Zotero.Utilities.htmlSpecialChars(namespaces[j])+'"');
 					}
 					rootDoc.setProperty("SelectionNamespaces", ieNamespaces.join(" "));
 				}
 				var nodes = element.selectNodes(xpath);
 				for(var j=0; j<nodes.length; j++) {
 					results.push(nodes[j]);
 				}
 			} else {
 				throw new Error("XPath functionality not available");
 			}
 		}
 		
 		return results;
 	},
 	
 	/**
 	 * Generates a string from the content of nodes matching a given XPath
 	 *
 	 * @param {element} node The node representing the document and context
 	 * @param {String} xpath The XPath expression
 	 * @param {Object} [namespaces] An object whose keys represent namespace prefixes, and whose
 	 *                              values represent their URIs
 	 * @param {String} [delimiter] The string with which to join multiple matching nodes
 	 * @return {String|null} DOM elements matching XPath, or null if no elements exist
 	 */
 	"xpathText":function(node, xpath, namespaces, delimiter) {
 		var elements = Zotero.Utilities.xpath(node, xpath, namespaces);
 		if(!elements.length) return null;
 		
 		var strings = new Array(elements.length);
 		for(var i=0, n=elements.length; i<n; i++) {
 			var el = elements[i];
 			if(el.wrappedJSObject) el = el.wrappedJSObject;
 			if(Zotero.Translate.DOMWrapper) el = Zotero.Translate.DOMWrapper.unwrap(el);
 			strings[i] =
 				(el.nodeType === 2 /*ATTRIBUTE_NODE*/ && "value" in el) ? el.value
 				: "textContent" in el ? el.textContent
 				: "innerText" in el ? el.innerText
 				: "text" in el ? el.text
 				: el.nodeValue;
 		}
 		
 		return strings.join(delimiter !== undefined ? delimiter : ", ");
 	},
 	
 	/**
 	 * Generate a random string of length 'len' (defaults to 8)
 	 **/
 	"randomString":function(len, chars) {
 		if (!chars) {
 			chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
 		}
 		if (!len) {
 			len = 8;
 		}
 		var randomstring = '';
 		for (var i=0; i<len; i++) {
 			var rnum = Math.floor(Math.random() * chars.length);
 			randomstring += chars.substring(rnum,rnum+1);
 		}
 		return randomstring;
 	},
 	
 	/**
 	 * PHP var_dump equivalent for JS
 	 *
 	 * Adapted from http://binnyva.blogspot.com/2005/10/dump-function-javascript-equivalent-of.html
 	 */
 	"varDump": function(obj,level,maxLevel,parentObjects,path) {
 		// Simple dump
 		var type = typeof obj;
 		if (type == 'number' || type == 'undefined' || type == 'boolean' || obj === null) {
 			if (!level) {
 				// When dumping these directly, make sure to distinguish them from regular
 				// strings as output by Zotero.debug (i.e. no quotes)
 				return '===>' + obj + '<=== (' + type + ')';
 			}
 			else {
 				return '' + obj;
 			}
 		}
 		else if (type == 'string') {
 			return JSON.stringify(obj);
 		}
 		else if (type == 'function') {
 			var funcStr = ('' + obj).trim();
 			if (!level) {
 				// Dump function contents as well if only dumping function
 				return funcStr;
 			}
 			
 			// Display [native code] label for native functions, but make it one line
 			if (/^[^{]+{\s*\[native code\]\s*}$/i.test(funcStr)) {
 				return funcStr.replace(/\s*(\[native code\])\s*/i, ' $1 ');
 			}
 			
 			// For non-native functions, display an elipsis
 			return ('' + obj).replace(/{[\s\S]*}/, '{...}');
 		}
 		else if (type != 'object') {
 			return '<<Unknown type: ' + type + '>> ' + obj;
 		}
 		
 		// Don't descend into global object cache for data objects
 		if (Zotero.isClient && typeof obj == 'object' && obj instanceof Zotero.DataObject) {
 			maxLevel = 1;
 		}
 		
 		// More complex dump with indentation for objects
 		if (level === undefined) {
 			level = 0;
 		}
 		
 		if (maxLevel === undefined) {
 			maxLevel = 5;
 		}
 		
 		var objType = Object.prototype.toString.call(obj);
 		
 		if (level > maxLevel) {
 			return objType + " <<Maximum depth reached>>";
 		}
 		
 		// The padding given at the beginning of the line.
 		var level_padding = "";
 		for (var j=0; j<level+1; j++) {
 			level_padding += "    ";
 		}
 		
 		//Special handling for Error or Exception
 		var isException = Zotero.isFx && !Zotero.isBookmarklet && obj instanceof Components.interfaces.nsIException;
 		var isError = obj instanceof Error;
 		if (!isException && !isError && obj.message !== undefined && obj.stack !== undefined) {
 			isError = true;
 		}
 		
 		if (isError || isException) {
 			var header = '';
 			if (isError) {
 				header = (obj.constructor && obj.constructor.name) ? obj.constructor.name : 'Error';
 			} else {
 				header = (obj.name ? obj.name + ' ' : '') + 'Exception';
 			}
 			
 			let msg = (obj.message ? ('' + obj.message).replace(/^/gm, level_padding).trim() : '');
 			if (obj.stack) {
 				let stack = obj.stack.trim().replace(/^(?=.)/gm, level_padding);
 				stack = Zotero.Utilities.Internal.filterStack(stack);
 				
 				msg += '\n\n';
 				
 				// At least with Zotero.HTTP.UnexpectedStatusException, the stack contains "Error:"
 				// and the message in addition to the trace. I'm not sure what's causing that
 				// (Bluebird?), but fix it here.
 				if (stack.startsWith('Error:')) {
 					msg += stack.replace('Error: ' + obj.message + '\n', '');
 				}
 				else {
 					msg += stack;
 				}
 			}
 			
 			return header + ': ' + msg;
 		}
 		
 		// Only dump single level for nsIDOMNode objects (including document)
 		if (Zotero.isFx && !Zotero.isBookmarklet
 			&& (obj instanceof Components.interfaces.nsIDOMNode
 				|| obj instanceof Components.interfaces.nsIDOMWindow)
 		) {
 			level = maxLevel;
 		}
 		
 		// Recursion checking
 		if(!parentObjects) {
 			parentObjects = [obj];
 			path = ['ROOT'];
 		}
 		
 		var isArray = objType == '[object Array]'
 		if (isArray) {
 			var dumpedText = '[';
 		}
 		else if (objType == '[object Object]') {
 			var dumpedText = '{';
 		}
 		else {
 			var dumpedText = objType + ' {';
 		}
 		for (var prop in obj) {
 			dumpedText += '\n' + level_padding + JSON.stringify(prop) + ": ";
 			
 			try {
 				var value = obj[prop];
 			} catch(e) {
 				dumpedText += "<<Access Denied>>";
 				continue;
 			}
 			
 			// Check for recursion
 			if (typeof(value) == 'object') {
 				var i = parentObjects.indexOf(value);
 				if(i != -1) {
 					var parentName = path.slice(0,i+1).join('->');
 					dumpedText += "<<Reference to parent object " + parentName + " >>";
 					continue;
 				}
 			}
 			
 			try {
 				dumpedText += Zotero.Utilities.varDump(value,level+1,maxLevel,parentObjects.concat([value]),path.concat([prop]));
 			} catch(e) {
 				dumpedText += "<<Error processing property: " + e.message + " (" + value + ")>>";
 			}
 		}
 		
 		var lastChar = dumpedText.charAt(dumpedText.length - 1);
 		if (lastChar != '[' && lastChar != '{') {
 			dumpedText += '\n' + level_padding.substr(4);
 		}
 		dumpedText += isArray ? ']' : '}';
 		
 		return dumpedText;
 	},
 	
 	/**
 	 * Converts an item from toArray() format to citeproc-js JSON
 	 * @param {Zotero.Item} zoteroItem
 	 * @return {Object|Promise<Object>} A CSL item, or a promise for a CSL item if a Zotero.Item
 	 *     is passed
 	 */
 	"itemToCSLJSON":function(zoteroItem) {
 		// If a Zotero.Item was passed, convert it to the proper format (skipping child items) and
 		// call this function again with that object
 		//
 		// (Zotero.Item won't be defined in translation-server)
 		if (typeof Zotero.Item !== 'undefined' && zoteroItem instanceof Zotero.Item) {
 			return this.itemToCSLJSON(
 				Zotero.Utilities.Internal.itemToExportFormat(zoteroItem, false, true)
 			);
 		}
 		
 		var cslType = CSL_TYPE_MAPPINGS[zoteroItem.itemType];
 		if (!cslType) {
 			throw new Error('Unexpected Zotero Item type "' + zoteroItem.itemType + '"');
 		}
 		
 		var itemTypeID = Zotero.ItemTypes.getID(zoteroItem.itemType);
 		
 		var cslItem = {
 			'id':zoteroItem.uri,
 			'type':cslType
 		};
 		
 		// get all text variables (there must be a better way)
 		for(var variable in CSL_TEXT_MAPPINGS) {
 			var fields = CSL_TEXT_MAPPINGS[variable];
 			for(var i=0, n=fields.length; i<n; i++) {
 				var field = fields[i],
 					value = null;
 				
 				if(field in zoteroItem) {
 					value = zoteroItem[field];
 				} else {
 					if (field == 'versionNumber') field = 'version'; // Until https://github.com/zotero/zotero/issues/670
 					var fieldID = Zotero.ItemFields.getID(field),
 						typeFieldID;
 					if(fieldID
 						&& (typeFieldID = Zotero.ItemFields.getFieldIDFromTypeAndBase(itemTypeID, fieldID))
 					) {
 						value = zoteroItem[Zotero.ItemFields.getName(typeFieldID)];
 					}
 				}
 				
 				if (!value) continue;
 				
 				if (typeof value == 'string') {
 					if (field == 'ISBN') {
 						// Only use the first ISBN in CSL JSON
 						var isbn = value.match(/^(?:97[89]-?)?(?:\d-?){9}[\dx](?!-)\b/i);
 						if (isbn) value = isbn[0];
 					}
 					else if (field == 'extra') {
 						value = Zotero.Cite.extraToCSL(value);
 					}
 					
 					// Strip enclosing quotes
 					if(value.charAt(0) == '"' && value.indexOf('"', 1) == value.length - 1) {
 						value = value.substring(1, value.length-1);
 					}
 					cslItem[variable] = value;
 					break;
 				}
 			}
 		}
 		
 		// separate name variables
 		if (zoteroItem.type != "attachment" && zoteroItem.type != "note") {
 			var author = Zotero.CreatorTypes.getName(Zotero.CreatorTypes.getPrimaryIDForType(itemTypeID));
 			var creators = zoteroItem.creators;
 			for(var i=0; creators && i<creators.length; i++) {
 				var creator = creators[i];
 				var creatorType = creator.creatorType;
 				if(creatorType == author) {
 					creatorType = "author";
 				}
 				
 				creatorType = CSL_NAMES_MAPPINGS[creatorType];
 				if(!creatorType) continue;
 				
 				var nameObj;
 				if (creator.lastName || creator.firstName) {
 					nameObj = {
 						family: creator.lastName || '',
 						given: creator.firstName || ''
 					};
 					
 					// Parse name particles
 					// Replicate citeproc-js logic for what should be parsed so we don't
 					// break current behavior.
 					if (nameObj.family && nameObj.given) {
 						// Don't parse if last name is quoted
 						if (nameObj.family.length > 1
 							&& nameObj.family.charAt(0) == '"'
 							&& nameObj.family.charAt(nameObj.family.length - 1) == '"'
 						) {
 							nameObj.family = nameObj.family.substr(1, nameObj.family.length - 2);
 						} else {
 							Zotero.CiteProc.CSL.parseParticles(nameObj, true);
 						}
 					}
 				} else if (creator.name) {
 					nameObj = {'literal': creator.name};
 				}
 				
 				if(cslItem[creatorType]) {
 					cslItem[creatorType].push(nameObj);
 				} else {
 					cslItem[creatorType] = [nameObj];
 				}
 			}
 		}
 		
 		// get date variables
 		for(var variable in CSL_DATE_MAPPINGS) {
 			var date = zoteroItem[CSL_DATE_MAPPINGS[variable]];
 			if (!date) {
 				var typeSpecificFieldID = Zotero.ItemFields.getFieldIDFromTypeAndBase(itemTypeID, CSL_DATE_MAPPINGS[variable]);
 				if (typeSpecificFieldID) {
 					date = zoteroItem[Zotero.ItemFields.getName(typeSpecificFieldID)];
 				}
 			}
 			
 			if(date) {
 				var dateObj = Zotero.Date.strToDate(date);
 				// otherwise, use date-parts
 				var dateParts = [];
 				if(dateObj.year) {
 					// add year, month, and day, if they exist
 					dateParts.push(dateObj.year);
 					if(dateObj.month !== undefined) {
 						// strToDate() returns a JS-style 0-indexed month, so we add 1 to it
 						dateParts.push(dateObj.month+1);
 						if(dateObj.day) {
 							dateParts.push(dateObj.day);
 						}
 					}
 					cslItem[variable] = {"date-parts":[dateParts]};
 					
 					// if no month, use season as month
 					if(dateObj.part && dateObj.month === undefined) {
 						cslItem[variable].season = dateObj.part;
 					}
 				} else {
 					// if no year, pass date literally
 					cslItem[variable] = {"literal":date};
 				}
 			}
 		}
 		
 		// Special mapping for note title
 		if (zoteroItem.itemType == 'note' && zoteroItem.note) {
 			cslItem.title = Zotero.Notes.noteToTitle(zoteroItem.note);
 		}
 		
 		//this._cache[zoteroItem.id] = cslItem;
 		return cslItem;
 	},
 	
 	/**
 	 * Converts an item in CSL JSON format to a Zotero item
 	 * @param {Zotero.Item} item
 	 * @param {Object} cslItem
 	 */
 	"itemFromCSLJSON":function(item, cslItem) {
 		var isZoteroItem = !!item.setType,
 			zoteroType;
 		
 		// Some special cases to help us map item types correctly
 		// This ensures that we don't lose data on import. The fields
 		// we check are incompatible with the alternative item types
 		if (cslItem.type == 'book') {
 			zoteroType = 'book';
 			if (cslItem.version) {
 				zoteroType = 'computerProgram';
 			}
 		} else if (cslItem.type == 'bill') {
 			zoteroType = 'bill';
 			if (cslItem.publisher || cslItem['number-of-volumes']) {
 				zoteroType = 'hearing';
 			}
 		} else if (cslItem.type == 'song') {
 			zoteroType = 'audioRecording';
 			if (cslItem.number) {
 				zoteroType = 'podcast';
 			}
 		} else if (cslItem.type == 'motion_picture') {
 			zoteroType = 'film';
 			if (cslItem['collection-title'] || cslItem['publisher-place']
 				|| cslItem['event-place'] || cslItem.volume
 				|| cslItem['number-of-volumes'] || cslItem.ISBN
 			) {
 				zoteroType = 'videoRecording';
 			}
 		} else {
 			for(var type in CSL_TYPE_MAPPINGS) {
 				if(CSL_TYPE_MAPPINGS[type] == cslItem.type) {
 					zoteroType = type;
 					break;
 				}
 			}
 		}
 		
 		if(!zoteroType) zoteroType = "document";
 		
 		var itemTypeID = Zotero.ItemTypes.getID(zoteroType);
 		if(isZoteroItem) {
 			item.setType(itemTypeID);
 		} else {
 			item.itemID = cslItem.id;
 			item.itemType = zoteroType;
 		}
 		
 		// map text fields
 		for(var variable in CSL_TEXT_MAPPINGS) {
 			if(variable in cslItem) {
 				var textMappings = CSL_TEXT_MAPPINGS[variable];
 				for(var i=0; i<textMappings.length; i++) {
 					var field = textMappings[i];
 					var fieldID = Zotero.ItemFields.getID(field);
 
 					if(Zotero.ItemFields.isBaseField(fieldID)) {
 						var newFieldID = Zotero.ItemFields.getFieldIDFromTypeAndBase(itemTypeID, fieldID);
 						if(newFieldID) fieldID = newFieldID;
 					}
 					
 					if(Zotero.ItemFields.isValidForType(fieldID, itemTypeID)) {
 						// TODO: Convert restrictive Extra cheater syntax ('original-date: 2018')
 						// to nicer format we allow ('Original Date: 2018'), unless we've added
 						// those fields before we get to that
 						if(isZoteroItem) {
 							item.setField(fieldID, cslItem[variable]);
 						} else {
 							item[field] = cslItem[variable];
 						}
 						
 						break;
 					}
 				}
 			}
 		}
 		
 		// separate name variables
 		for(var field in CSL_NAMES_MAPPINGS) {
 			if(CSL_NAMES_MAPPINGS[field] in cslItem) {
 				var creatorTypeID = Zotero.CreatorTypes.getID(field);
 				if(!Zotero.CreatorTypes.isValidForItemType(creatorTypeID, itemTypeID)) {
 					creatorTypeID = Zotero.CreatorTypes.getPrimaryIDForType(itemTypeID);
 				}
 				
 				var nameMappings = cslItem[CSL_NAMES_MAPPINGS[field]];
 				for(var i in nameMappings) {
 					var cslAuthor = nameMappings[i];
 					let creator = {};
 					if(cslAuthor.family || cslAuthor.given) {
 						creator.lastName = cslAuthor.family || '';
 						creator.firstName = cslAuthor.given || '';
 					} else if(cslAuthor.literal) {
 						creator.lastName = cslAuthor.literal;
 						creator.fieldMode = 1;
 					} else {
 						continue;
 					}
 					creator.creatorTypeID = creatorTypeID;
 					
 					if(isZoteroItem) {
 						item.setCreator(item.getCreators().length, creator);
 					} else {
 						creator.creatorType = Zotero.CreatorTypes.getName(creatorTypeID);
 						if (Zotero.isFx && !Zotero.isBookmarklet) {
 							creator = Components.utils.cloneInto(creator, item);
 						}
 						item.creators.push(creator);
 					}
 				}
 			}
 		}
 		
 		// get date variables
 		for(var variable in CSL_DATE_MAPPINGS) {
 			if(variable in cslItem) {
 				var field = CSL_DATE_MAPPINGS[variable],
 					fieldID = Zotero.ItemFields.getID(field),
 					cslDate = cslItem[variable];
 				var fieldID = Zotero.ItemFields.getID(field);
 				if(Zotero.ItemFields.isBaseField(fieldID)) {
 					var newFieldID = Zotero.ItemFields.getFieldIDFromTypeAndBase(itemTypeID, fieldID);
 					if(newFieldID) fieldID = newFieldID;
 				}
 				
 				if(Zotero.ItemFields.isValidForType(fieldID, itemTypeID)) {
 					var date = "";
 					if(cslDate.literal || cslDate.raw) {
 						date = cslDate.literal || cslDate.raw;
 						if(variable === "accessed") {
 							date = Zotero.Date.strToISO(date);
 						}
 					} else {
 						var newDate = Zotero.Utilities.deepCopy(cslDate);
 						if(cslDate["date-parts"] && typeof cslDate["date-parts"] === "object"
 								&& cslDate["date-parts"] !== null
 								&& typeof cslDate["date-parts"][0] === "object"
 								&& cslDate["date-parts"][0] !== null) {
 							if(cslDate["date-parts"][0][0]) newDate.year = cslDate["date-parts"][0][0];
 							if(cslDate["date-parts"][0][1]) newDate.month = cslDate["date-parts"][0][1];
 							if(cslDate["date-parts"][0][2]) newDate.day = cslDate["date-parts"][0][2];
 						}
 						
 						if(newDate.year) {
 							if(variable === "accessed") {
 								// Need to convert to SQL
 								var date = Zotero.Utilities.lpad(newDate.year, "0", 4);
 								if(newDate.month) {
 									date += "-"+Zotero.Utilities.lpad(newDate.month, "0", 2);
 									if(newDate.day) {
 										date += "-"+Zotero.Utilities.lpad(newDate.day, "0", 2);
 									}
 								}
 							} else {
 								if(newDate.month) newDate.month--;
 								date = Zotero.Date.formatDate(newDate);
 								if(newDate.season) {
 									date = newDate.season+" "+date;
 								}
 							}
 						}
 					}
 					
 					if(isZoteroItem) {
 						item.setField(fieldID, date);
 					} else {
 						item[field] = date;
 					}
 				}
 			}
 		}
 	},
 	
 	/**
 	 * Get the real target URL from an intermediate URL
 	 */
 	"resolveIntermediateURL":function(url) {
 		var patterns = [
 			// Google search results
 			{
 				regexp: /^https?:\/\/(www.)?google\.(com|(com?\.)?[a-z]{2})\/url\?/,
 				variable: "url"
 			}
 		];
 		
 		for (var i=0, len=patterns.length; i<len; i++) {
 			if (!url.match(patterns[i].regexp)) {
 				continue;
 			}
 			var matches = url.match(new RegExp("&" + patterns[i].variable + "=(.+?)(&|$)"));
 			if (!matches) {
 				continue;
 			}
 			return decodeURIComponent(matches[1]);
 		}
 		
 		return url;
 	},
 	
 	/**
 	 * Adds a string to a given array at a given offset, converted to UTF-8
 	 * @param {String} string The string to convert to UTF-8
 	 * @param {Array|Uint8Array} array The array to which to add the string
 	 * @param {Integer} [offset] Offset at which to add the string
 	 */
 	"stringToUTF8Array":function(string, array, offset) {
 		if(!offset) offset = 0;
 		var n = string.length;
 		for(var i=0; i<n; i++) {
 			var val = string.charCodeAt(i);
 			if(val >= 128) {
 				if(val >= 2048) {
 					array[offset] = (val >>> 12) | 224;
 					array[offset+1] = ((val >>> 6) & 63) | 128;
 					array[offset+2] = (val & 63) | 128;
 					offset += 3;
 				} else {
 					array[offset] = ((val >>> 6) | 192);
 					array[offset+1] = (val & 63) | 128;
 					offset += 2;
 				}
 			} else {
 				array[offset++] = val;
 			}
 		}
 	},
 	
 	/**
 	 * Gets the byte length of the UTF-8 representation of a given string
 	 * @param {String} string
 	 * @return {Integer}
 	 */
 	"getStringByteLength":function(string) {
 		var length = 0, n = string.length;
 		for(var i=0; i<n; i++) {
 			var val = string.charCodeAt(i);
 			if(val >= 128) {
 				if(val >= 2048) {
 					length += 3;
 				} else {
 					length += 2;
 				}
 			} else {
 				length += 1;
 			}
 		}
 		return length;
 	},
 	
 	/**
 	 * Gets the icon for a JSON-style attachment
 	 */
 	"determineAttachmentIcon":function(attachment) {
 		if(attachment.linkMode === "linked_url") {
 			return Zotero.ItemTypes.getImageSrc("attachment-web-link");
 		}
 		return Zotero.ItemTypes.getImageSrc(attachment.mimeType === "application/pdf"
 							? "attachment-pdf" : "attachment-snapshot");
 	},
 	
 	"allowedKeyChars": "23456789ABCDEFGHIJKLMNPQRSTUVWXYZ",
 	
 	/**
 	 * Generates a valid object key for the server API
 	 */
 	"generateObjectKey":function generateObjectKey() {
 		return Zotero.Utilities.randomString(8, Zotero.Utilities.allowedKeyChars);
 	},
 	
 	/**
 	 * Check if an object key is in a valid format
 	 */
 	"isValidObjectKey":function(key) {
 		if (!Zotero.Utilities.objectKeyRegExp) {
 			Zotero.Utilities.objectKeyRegExp = new RegExp('^[' + Zotero.Utilities.allowedKeyChars + ']{8}$');
 		}
 		return Zotero.Utilities.objectKeyRegExp.test(key);
 	},
 	
 	/**
 	 * Provides unicode support and other additional features for regular expressions
 	 * See https://github.com/slevithan/xregexp for usage
 	 */
 	 "XRegExp": XRegExp
 }