1 files changed, 59 insertions, 0 deletions
diff --git a/public/javascripts/url.js b/public/javascripts/url.js
new file mode 100644
index 0000000..63e6081
--- /dev/null
+++ b/public/javascripts/url.js
@@ -0,0 +1,59 @@
+/* global USERS */
+
+const EventEmitter = require('events')
+
+const self = new EventEmitter()
+
+self._getPageTitle = function (selectedUser) {
+  if (selectedUser == null) {
+    return `Metis Rooster`
+  } else {
+    return `Metis Rooster - ${selectedUser.value}`
+  }
+}
+
+self._getPageURL = function (selectedUser) {
+  return `/${selectedUser.type}/${selectedUser.value}`
+}
+
+self.push = function (selectedUser, push) {
+  if (push == null) push = true
+  const pageTitle = self._getPageTitle(selectedUser)
+  const pageURL = self._getPageURL(selectedUser)
+  if (push) {
+    window.history.pushState(selectedUser, pageTitle, pageURL)
+  } else {
+    window.history.replaceState(selectedUser, pageTitle, pageURL)
+  }
+}
+
+self.update = function (selectedUser) {
+  document.title = self._getPageTitle(selectedUser)
+}
+
+self.hasSelectedUser = function () {
+  const pageUrl = window.location.pathname
+  return /^\/s\/|^\/t\/|^\/r\/|^\/c\//.test(pageUrl)
+}
+
+self.getSelectedUser = function () {
+  const pageUrl = window.location.pathname
+  const pageUrlData = pageUrl.split('/')
+  const type = pageUrlData[1]
+  const value = pageUrlData[2]
+
+  const user = USERS.filter(function (user) {
+    return user.type === type &&
+           user.value === value
+  })[0]
+
+  return user
+}
+
+self._handleUpdate = function (event) {
+  self.emit('update', event.state)
+}
+
+window.addEventListener('popstate', self._handleUpdate)
+
+module.exports = self