diff options
Diffstat (limited to 'vnfmarket/src/main/webapp/vnfmarket/node_modules/negotiator/lib/language.js')
-rw-r--r-- | vnfmarket/src/main/webapp/vnfmarket/node_modules/negotiator/lib/language.js | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/vnfmarket/src/main/webapp/vnfmarket/node_modules/negotiator/lib/language.js b/vnfmarket/src/main/webapp/vnfmarket/node_modules/negotiator/lib/language.js new file mode 100644 index 00000000..ed9e1ec0 --- /dev/null +++ b/vnfmarket/src/main/webapp/vnfmarket/node_modules/negotiator/lib/language.js @@ -0,0 +1,112 @@ +module.exports = preferredLanguages; +preferredLanguages.preferredLanguages = preferredLanguages; + +function parseAcceptLanguage(accept) { + var accepts = accept.split(','); + + for (var i = 0, j = 0; i < accepts.length; i++) { + var langauge = parseLanguage(accepts[i].trim(), i); + + if (langauge) { + accepts[j++] = langauge; + } + } + + // trim accepts + accepts.length = j; + + return accepts; +} + +function parseLanguage(s, i) { + var match = s.match(/^\s*(\S+?)(?:-(\S+?))?\s*(?:;(.*))?$/); + if (!match) return null; + + var prefix = match[1], + suffix = match[2], + full = prefix; + + if (suffix) full += "-" + suffix; + + var q = 1; + if (match[3]) { + var params = match[3].split(';') + for (var i = 0; i < params.length; i ++) { + var p = params[i].split('='); + if (p[0] === 'q') q = parseFloat(p[1]); + } + } + + return { + prefix: prefix, + suffix: suffix, + q: q, + i: i, + full: full + }; +} + +function getLanguagePriority(language, accepted, index) { + var priority = {o: -1, q: 0, s: 0}; + + for (var i = 0; i < accepted.length; i++) { + var spec = specify(language, accepted[i], index); + + if (spec && (priority.s - spec.s || priority.q - spec.q || priority.o - spec.o) < 0) { + priority = spec; + } + } + + return priority; +} + +function specify(language, spec, index) { + var p = parseLanguage(language) + if (!p) return null; + var s = 0; + if(spec.full.toLowerCase() === p.full.toLowerCase()){ + s |= 4; + } else if (spec.prefix.toLowerCase() === p.full.toLowerCase()) { + s |= 2; + } else if (spec.full.toLowerCase() === p.prefix.toLowerCase()) { + s |= 1; + } else if (spec.full !== '*' ) { + return null + } + + return { + i: index, + o: spec.i, + q: spec.q, + s: s + } +}; + +function preferredLanguages(accept, provided) { + // RFC 2616 sec 14.4: no header = * + var accepts = parseAcceptLanguage(accept === undefined ? '*' : accept || ''); + + if (!provided) { + // sorted list of all languages + return accepts.filter(isQuality).sort(compareSpecs).map(function getLanguage(spec) { + return spec.full; + }); + } + + var priorities = provided.map(function getPriority(type, index) { + return getLanguagePriority(type, accepts, index); + }); + + // sorted list of accepted languages + return priorities.filter(isQuality).sort(compareSpecs).map(function getLanguage(priority) { + return provided[priorities.indexOf(priority)]; + }); +} + +function compareSpecs(a, b) { + return (b.q - a.q) || (b.s - a.s) || (a.o - b.o) || (a.i - b.i) || 0; +} + +function isQuality(spec) { + return spec.q > 0; +} |