draft: refactor project so it sits on top of a standalone app

zero.Web.UI/node_modules/http-proxy-middleware/lib/context-matcher.js

@@ -0,0 +1,94 @@
+var _ = require('lodash')
+var url = require('url')
+var isGlob = require('is-glob')
+var micromatch = require('micromatch')
+var ERRORS = require('./errors')
+
+module.exports = {
+  match: matchContext
+}
+
+function matchContext(context, uri, req) {
+  // single path
+  if (isStringPath(context)) {
+    return matchSingleStringPath(context, uri)
+  }
+
+  // single glob path
+  if (isGlobPath(context)) {
+    return matchSingleGlobPath(context, uri)
+  }
+
+  // multi path
+  if (Array.isArray(context)) {
+    if (context.every(isStringPath)) {
+      return matchMultiPath(context, uri)
+    }
+    if (context.every(isGlobPath)) {
+      return matchMultiGlobPath(context, uri)
+    }
+
+    throw new Error(ERRORS.ERR_CONTEXT_MATCHER_INVALID_ARRAY)
+  }
+
+  // custom matching
+  if (_.isFunction(context)) {
+    var pathname = getUrlPathName(uri)
+    return context(pathname, req)
+  }
+
+  throw new Error(ERRORS.ERR_CONTEXT_MATCHER_GENERIC)
+}
+
+/**
+ * @param  {String} context '/api'
+ * @param  {String} uri     'http://example.org/api/b/c/d.html'
+ * @return {Boolean}
+ */
+function matchSingleStringPath(context, uri) {
+  var pathname = getUrlPathName(uri)
+  return pathname.indexOf(context) === 0
+}
+
+function matchSingleGlobPath(pattern, uri) {
+  var pathname = getUrlPathName(uri)
+  var matches = micromatch(pathname, pattern)
+  return matches && matches.length > 0
+}
+
+function matchMultiGlobPath(patternList, uri) {
+  return matchSingleGlobPath(patternList, uri)
+}
+
+/**
+ * @param  {String} contextList ['/api', '/ajax']
+ * @param  {String} uri     'http://example.org/api/b/c/d.html'
+ * @return {Boolean}
+ */
+function matchMultiPath(contextList, uri) {
+  for (var i = 0; i < contextList.length; i++) {
+    var context = contextList[i]
+    if (matchSingleStringPath(context, uri)) {
+      return true
+    }
+  }
+  return false
+}
+
+/**
+ * Parses URI and returns RFC 3986 path
+ *
+ * @param  {String} uri from req.url
+ * @return {String}     RFC 3986 path
+ */
+function getUrlPathName(uri) {
+  return uri && url.parse(uri).pathname
+}
+
+function isStringPath(context) {
+  return _.isString(context) && !isGlob(context)
+}
+
+function isGlobPath(context) {
+  return isGlob(context)
+}