Name: js-handler/node_modules/restify/node_modules/negotiator/lib/language.js
| 1: | module.exports = preferredLanguages; |
| 2: | preferredLanguages.preferredLanguages = preferredLanguages; |
| 3: | |
| 4: | function parseAcceptLanguage(accept) { |
| 5: | return accept.split(',').map(function(e) { |
| 6: | return parseLanguage(e.trim()); |
| 7: | }).filter(function(e) { |
| 8: | return e && e.q > 0; |
| 9: | }); |
| 10: | } |
| 11: | |
| 12: | function parseLanguage(s) { |
| 13: | var match = s.match(/^\s*(\S+?)(?:-(\S+?))?\s*(?:;(.*))?$/); |
| 14: | if (!match) return null; |
| 15: | |
| 16: | var prefix = match[1], |
| 17: | suffix = match[2], |
| 18: | full = prefix; |
| 19: | |
| 20: | if (suffix) full += "-" + suffix; |
| 21: | |
| 22: | var q = 1; |
| 23: | if (match[3]) { |
| 24: | var params = match[3].split(';') |
| 25: | for (var i = 0; i < params.length; i ++) { |
| 26: | var p = params[i].split('='); |
| 27: | if (p[0] === 'q') q = parseFloat(p[1]); |
| 28: | } |
| 29: | } |
| 30: | |
| 31: | return { |
| 32: | prefix: prefix, |
| 33: | suffix: suffix, |
| 34: | q: q, |
| 35: | full: full |
| 36: | }; |
| 37: | } |
| 38: | |
| 39: | function getLanguagePriority(language, accepted) { |
| 40: | var match = getClosestMatch(language, accepted); |
| 41: | return match ? match.q : 0; |
| 42: | } |
| 43: | |
| 44: | function getClosestMatch(language, accepted) { |
| 45: | var parsed = parseLanguage(language); |
| 46: | |
| 47: | var matches = accepted.filter(function(a) { |
| 48: | return a.full === parsed.full; |
| 49: | }); |
| 50: | if (matches.length) return matches[0]; |
| 51: | |
| 52: | matches = accepted.filter(function(a) { |
| 53: | return a.prefix === parsed.prefix && !a.suffix; |
| 54: | }); |
| 55: | if (matches.length) return matches[0]; |
| 56: | |
| 57: | matches = accepted.filter(function(a) { |
| 58: | return a.prefix === parsed.prefix; |
| 59: | }); |
| 60: | if (matches.length) return matches[0]; |
| 61: | |
| 62: | matches = accepted.filter(function(a) { |
| 63: | return a.prefix === '*'; |
| 64: | }); |
| 65: | return matches[0]; |
| 66: | } |
| 67: | |
| 68: | function preferredLanguages(accept, provided) { |
| 69: | accept = parseAcceptLanguage(accept || ''); |
| 70: | if (provided) { |
| 71: | |
| 72: | var ret = provided.map(function(type) { |
| 73: | return [type, getLanguagePriority(type, accept)]; |
| 74: | }).filter(function(pair) { |
| 75: | return pair[1] > 0; |
| 76: | }).sort(function(a, b) { |
| 77: | // revsort |
| 78: | return a[1] === b[1] ? 0 : a[1] > b[1] ? -1 : 1; |
| 79: | }).map(function(pair) { |
| 80: | return pair[0]; |
| 81: | }); |
| 82: | return ret; |
| 83: | |
| 84: | } else { |
| 85: | return accept.map(function(type) { |
| 86: | return type.full; |
| 87: | }); |
| 88: | } |
| 89: | } |
