Delete 3 unused functions (experiments with identifier parsing)

Author: zuphilip

IEEE Xplore.js

@@ -9,7 +9,7 @@
 	"inRepository": true,
 	"translatorType": 4,
 	"browserSupport": "gcsibv",
-	"lastUpdated": "2013-10-27 10:59:14"
+	"lastUpdated": "2014-04-29 22:35:22"
 }
 
 function detectWeb(doc, url) {
@@ -95,58 +95,6 @@ function doWeb(doc, url) {
 	}
 }
 
-function parseIdentifier(identifier) {
-	var idPieces = identifier.split(':');
-	if (idPieces.length > 1) {
-		var prefix = idPieces.shift();
-		switch (prefix.toLowerCase()) {
-		case "doi":
-			return ["doi", idPieces.join(':')];
-		case "isbn":
-			return ["isbn", idPieces.join(':')];
-		case "issn":
-			return ["issn", idPieces.join(':')];
-		case "pmid":
-			return ["pmid", idPieces.join(':')];
-		default:
-			// do nothing
-		}
-		//Zotero.debug("Unknown identifier prefix '"+prefix+"'");
-		return [prefix, idPieces.join(':')];
-	}
-	if (identifer.substr(0, 3) == '10.') return ["doi", identifier];
-
-	// If we're here, we have a funny number, and we don't know what to do with it.
-	var ids = idCheck(identifier);
-	if (ids.isbn13) return ["isbn13", isbn13];
-	if (ids.isbn10) return ["isbn10", isbn10];
-	if (ids.issn) return ["issn", isbn10];
-
-	return ["unknown", identifier];
-}
-
-function addIdentifier(identifier, item) {
-	var parsed = parseIdentifier(identifier);
-	switch (parsed[0]) {
-	case "doi":
-		item.DOI = parsed[1];
-		break;
-	case "isbn":
-		item.ISBN = parsed[1];
-		break;
-	case "isbn13":
-		item.ISBN = parsed[1];
-		break;
-	case "isbn10":
-		item.ISBN = parsed[1];
-		break;
-	case "issn":
-		item.ISSN = parsed[1];
-		break;
-	default:
-	}
-}
-
 function scrape (doc, url) {
  	var arnumber = url.match(/arnumber=\d+/)[0].replace(/arnumber=/, "");
   	var pdf;
@@ -208,141 +156,6 @@ function scrape (doc, url) {
 	});
 }
 
-// Implementation of ISBN and ISSN check-digit verification
-// Based on ISBN Users' Manual (http://www.isbn.org/standards/home/isbn/international/html/usm4.htm)
-// and the Wikipedia treatment of ISBN (http://en.wikipedia.org/wiki/International_Standard_Book_Number)
-// and the Wikipedia treatment of ISSN (http://en.wikipedia.org/wiki/International_Standard_Serial_Number)
-// This will also check ISMN validity, although it does not distinguish from their
-// neighbors in namespace, ISBN-13. It does not handle pre-2008 M-prefixed ISMNs; see
-// http://en.wikipedia.org/wiki/International_Standard_Music_Number
-// This does not validate multiple identifiers in one field,
-// but it will gracefully ignore all non-number detritus,
-// such as extraneous hyphens, spaces, and comments.
-// It currently maintains hyphens in non-initial and non-final position,
-// discarding consecutive ones beyond the first as well.
-// It also adds the customary hyphen to valid ISSNs.
-// Takes the first 8 valid digits and tries to read an ISSN,
-// takes the first 10 valid digits and tries to read an ISBN 10,
-// and takes the first 13 valid digits to try to read an ISBN 13
-// Returns an object with four attributes:
-// 	"issn"
-// 	"isbn10"
-// 	"isbn13"
-// Each will be set to a valid identifier if found, and otherwise be a
-// boolean false.
-// There could conceivably be a valid ISBN-13 with an ISBN-10
-// substring; this should probably be interpreted as the latter, but it is a
-idCheck = function (isbn) {
-	// For ISBN 10, multiple by these coefficients, take the sum mod 11
-	// and subtract from 11
-	var isbn10 = [10, 9, 8, 7, 6, 5, 4, 3, 2];
-
-	// For ISBN 13, multiple by these coefficients, take the sum mod 10
-	// and subtract from 10
-	var isbn13 = [1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3];
-
-	// For ISSN, multiply by these coefficients, take the sum mod 11
-	// and subtract from 11
-	var issn = [8, 7, 6, 5, 4, 3, 2];
-
-	// We make a single pass through the provided string, interpreting the
-	// first 10 valid characters as an ISBN-10, and the first 13 as an
-	// ISBN-13. We then return an array of booleans and valid detected
-	// ISBNs.
-	var j = 0;
-	var sum8 = 0;
-	var num8 = "";
-	var sum10 = 0;
-	var num10 = "";
-	var sum13 = 0;
-	var num13 = "";
-	var chars = [];
-
-	for (var i = 0; i < isbn.length; i++) {
-		if (isbn.charAt(i) == " ") {
-			// Since the space character evaluates as a number,
-			// it is a special case.
-		} else if (j > 0 && isbn.charAt(i) == "-" && isbn.charAt(i - 1) != "-") {
-			// Preserve hyphens, except in initial and final position
-			// Also discard consecutive hyphens
-			if (j < 7) num8 += "-";
-			if (j < 10) num10 += "-";
-			if (j < 13) num13 += "-";
-		} else if (j < 7 && ((isbn.charAt(i) - 0) == isbn.charAt(i))) {
-			sum8 += isbn.charAt(i) * issn[j];
-			sum10 += isbn.charAt(i) * isbn10[j];
-			sum13 += isbn.charAt(i) * isbn13[j];
-			num8 += isbn.charAt(i);
-			num10 += isbn.charAt(i);
-			num13 += isbn.charAt(i);
-			j++;
-		} else if (j == 7 && (isbn.charAt(i) == "X" || isbn.charAt(i) == "x" || ((isbn.charAt(i) - 0) == isbn.charAt(i)))) {
-			// In ISSN, an X represents the check digit "10".
-			if (isbn.charAt(i) == "X" || isbn.charAt(i) == "x") {
-				var check8 = 10;
-				num8 += "X";
-			} else {
-				var check8 = isbn.charAt(i);
-				sum10 += isbn.charAt(i) * isbn10[j];
-				sum13 += isbn.charAt(i) * isbn13[j];
-				num8 += isbn.charAt(i);
-				num10 += isbn.charAt(i);
-				num13 += isbn.charAt(i);
-				j++;
-			}
-		} else if (j < 9 && ((isbn.charAt(i) - 0) == isbn.charAt(i))) {
-			sum10 += isbn.charAt(i) * isbn10[j];
-			sum13 += isbn.charAt(i) * isbn13[j];
-			num10 += isbn.charAt(i);
-			num13 += isbn.charAt(i);
-			j++;
-		} else if (j == 9 && (isbn.charAt(i) == "X" || isbn.charAt(i) == "x" || ((isbn.charAt(i) - 0) == isbn.charAt(i)))) {
-			// In ISBN-10, an X represents the check digit "10".
-			if (isbn.charAt(i) == "X" || isbn.charAt(i) == "x") {
-				var check10 = 10;
-				num10 += "X";
-			} else {
-				var check10 = isbn.charAt(i);
-				sum13 += isbn.charAt(i) * isbn13[j];
-				num10 += isbn.charAt(i);
-				num13 += isbn.charAt(i);
-				j++;
-			}
-		} else if (j < 12 && ((isbn.charAt(i) - 0) == isbn.charAt(i))) {
-			sum13 += isbn.charAt(i) * isbn13[j];
-			num13 += isbn.charAt(i);
-			j++;
-		} else if (j == 12 && ((isbn.charAt(i) - 0) == isbn.charAt(i))) {
-			var check13 = isbn.charAt(i);
-			num13 += isbn.charAt(i);
-		}
-	}
-	var valid8 = ((11 - sum8 % 11) % 11) == check8;
-	var valid10 = ((11 - sum10 % 11) % 11) == check10;
-	var valid13 = (10 - sum13 % 10 == check13);
-	var matches = false;
-
-	// Since ISSNs have a standard hyphen placement, we can add a hyphen
-	if (valid8 && (matches = num8.match(/([0-9]{4})([0-9]{3}[0-9Xx])/))) {
-		num8 = matches[1] + '-' + matches[2];
-	}
-
-	if (!valid8) {
-		num8 = false
-	};
-	if (!valid10) {
-		num10 = false
-	};
-	if (!valid13) {
-		num13 = false
-	};
-	return {
-		"isbn10": num10,
-		"isbn13": num13,
-		"issn": num8
-	};
-}
-
 /** BEGIN TEST CASES **/
 var testCases = [
 	{