CHIEFSOFT\ameye
77 lines
2.4 KiB
JavaScript
77 lines
2.4 KiB
JavaScript
/**
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* @defgroup plugins_pubIds_urn_js
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*/
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/**
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* @file plugins/pubIds/urn/js/checkNumber.js
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*
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* Copyright (c) 2014-2021 Simon Fraser University
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* Copyright (c) 2003-2021 John Willinsky
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* Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
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*
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* @brief Function for determining and adding the check number for URNs
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*/
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(function($) {
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/**
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* Add method to the pkp namespace
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*/
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$.pkp.plugins.generic.urn = {
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/**
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* Get the last, check number.
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* Algorithm (s. http://www.persistent-identifier.de/?link=316):
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* every URN character is replaced with a number
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* according to the conversion table,
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* every number is multiplied by
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* it's position/index (beginning with 1),
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* the numbers' sum is calculated,
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* the sum is divided by the last number,
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* the last number of the quotient
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* before the decimal point is the check number.
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*
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* @param {string} urn
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* @param {string} urnPrefix
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*/
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getCheckNumber: function(urn, urnPrefix) {
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var newURN = '',
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conversionTable = {
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'9': '41', '8': '9', '7': '8', '6': '7',
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'5': '6', '4': '5', '3': '4', '2': '3',
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'1': '2', '0': '1', 'a': '18', 'b': '14',
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'c': '19', 'd': '15', 'e': '16', 'f': '21',
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'g': '22', 'h': '23', 'i': '24', 'j': '25',
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'k': '42', 'l': '26', 'm': '27', 'n': '13',
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'o': '28', 'p': '29', 'q': '31', 'r': '12',
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's': '32', 't': '33', 'u': '11', 'v': '34',
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'w': '35', 'x': '36', 'y': '37', 'z': '38',
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'-': '39', ':': '17', '_': '43', '/': '45',
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'.': '47', '+': '49'
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},
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i, j, char, sum, lastNumber, quot, quotRound, quotString, newSuffix;
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suffix = urn.replace(urnPrefix, '').toLowerCase();
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for (i = 0; i < suffix.length; i++) {
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char = suffix.charAt(i);
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newURN += conversionTable[char];
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}
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sum = 0;
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for (j = 1; j <= newURN.length; j++) {
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sum = sum + (newURN.charAt(j - 1) * j);
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}
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lastNumber = newURN.charAt(newURN.length - 1);
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quot = sum / lastNumber;
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quotRound = Math.floor(quot);
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quotString = quotRound.toString();
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return parseInt(quotString.charAt(quotString.length - 1));
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}
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};
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// Apply the check number when the button is clicked
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$('#checkNo').on('click', () => {
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var urnPrefix = $('[id^="urnPrefix"]').val(), urnSuffix = $('[id^="urnSuffix"]').val();
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urn = urnPrefix + urnSuffix;
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$('[id^="urnSuffix"]').val(urnSuffix + $.pkp.plugins.generic.urn.getCheckNumber(urn, urnPrefix));
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});
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}(jQuery));
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