Initial commit for OpenECOMP SDN-C OA&M

[sdnc/oam.git] / dgbuilder / dgeflows / node_modules / serve-index / node_modules / accepts / node_modules / negotiator / lib / language.js

diff --git a/dgbuilder/dgeflows/node_modules/serve-index/node_modules/accepts/node_modules/negotiator/lib/language.js b/dgbuilder/dgeflows/node_modules/serve-index/node_modules/accepts/node_modules/negotiator/lib/language.js
new file mode 100644 (file)
index 0000000..ed9e1ec
--- /dev/null
+++ b/dgbuilder/dgeflows/node_modules/serve-index/node_modules/accepts/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;
+}