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68 lines
1.3 KiB
JavaScript
68 lines
1.3 KiB
JavaScript
6 years ago
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'use strict';
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var chars = {}, unesc, temp;
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function reverse(object, prepender) {
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return Object.keys(object).reduce(function(reversed, key) {
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var newKey = prepender ? prepender + key : key; // Optionally prepend a string to key.
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reversed[object[key]] = newKey; // Swap key and value.
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return reversed; // Return the result.
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}, {});
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}
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/**
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* Regex for common characters
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*/
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chars.escapeRegex = {
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'?': /\?/g,
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'@': /\@/g,
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'!': /\!/g,
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'+': /\+/g,
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'*': /\*/g,
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'(': /\(/g,
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')': /\)/g,
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'[': /\[/g,
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']': /\]/g
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};
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/**
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* Escape characters
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*/
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chars.ESC = {
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'?': '__UNESC_QMRK__',
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'@': '__UNESC_AMPE__',
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'!': '__UNESC_EXCL__',
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'+': '__UNESC_PLUS__',
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'*': '__UNESC_STAR__',
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',': '__UNESC_COMMA__',
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'(': '__UNESC_LTPAREN__',
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')': '__UNESC_RTPAREN__',
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'[': '__UNESC_LTBRACK__',
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']': '__UNESC_RTBRACK__'
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};
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/**
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* Unescape characters
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*/
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chars.UNESC = unesc || (unesc = reverse(chars.ESC, '\\'));
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chars.ESC_TEMP = {
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'?': '__TEMP_QMRK__',
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'@': '__TEMP_AMPE__',
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'!': '__TEMP_EXCL__',
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'*': '__TEMP_STAR__',
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'+': '__TEMP_PLUS__',
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',': '__TEMP_COMMA__',
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'(': '__TEMP_LTPAREN__',
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')': '__TEMP_RTPAREN__',
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'[': '__TEMP_LTBRACK__',
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']': '__TEMP_RTBRACK__'
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};
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chars.TEMP = temp || (temp = reverse(chars.ESC_TEMP));
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module.exports = chars;
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