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src/lib/navigation.js

@@ -1,67 +1,68 @@
-// Helper functions for hash navigation.
+// Utility class for hash navigation.
 
 // Parse hash as in http://www.example.com/path#hash as if it were
 // path and arguments.
-export function parseUrlHash(hash) {
-  // Split path from args, path -> parts[0], args->path[1]
-  let parts = hash.split('?', 2);
-  let params = {};
-  let path = [];
-  if (parts[0]) {
-    path = parts[0].substr(1).split('/');
-  }
-  if (parts[1]) {
-    parts[1].split('&').forEach(function(part) {
-      let item = part.split('=');
-      if (item[0]) {
-        params[decodeURIComponent(item[0])] = decodeURIComponent(item[1]);
-      }
-    });
-  }
-  return {path: path, params: params};
-}
-
-export function navigateTo(url) {
-  window.location.hash = url;
-}
-
-export function composeUrlHash(path, params) {
-  var url = path.join('/');
-  var args = [];
-  for (var key in params) {
-    if (params.hasOwnProperty(key)) {
-      args.push(key + '=' + params[key]);
+export default class HashNavigation {
+  static parseUrlHash(hash) {
+    // Split path from args, path -> parts[0], args->path[1]
+    let parts = hash.split('?', 2);
+    let params = {};
+    let path = [];
+    if (parts[0]) {
+      path = parts[0].substr(1).split('/');
     }
+    if (parts[1]) {
+      parts[1].split('&').forEach(function(part) {
+        let item = part.split('=');
+        if (item[0]) {
+          params[decodeURIComponent(item[0])] = decodeURIComponent(item[1]);
+        }
+      });
+    }
+    return {path: path, params: params};
   }
-  if (args.length > 0) {
-    url += '?' + args.join('&');
+
+  static navigateTo(url) {
+    window.location.hash = url;
   }
-  return url;
-}
 
-export function addUrlParam(hash, key, value) {
-  var parsed = parseUrlHash(hash);
-  parsed.params[key] = value;
-  return composeUrlHash(parsed.path, parsed.params);
-}
+  static composeUrlHash(path, params) {
+    var url = path.join('/');
+    var args = [];
+    for (var key in params) {
+      if (params.hasOwnProperty(key)) {
+        args.push(key + '=' + params[key]);
+      }
+    }
+    if (args.length > 0) {
+      url += '?' + args.join('&');
+    }
+    return url;
+  }
 
-export function removeUrlParam(hash, key) {
-  var parsed = parseUrlHash(hash);
-  delete parsed.params[key];
-  return composeUrlHash(parsed.path, parsed.params);
-}
+  static addUrlParam(hash, key, value) {
+    var parsed = parseUrlHash(hash);
+    parsed.params[key] = value;
+    return composeUrlHash(parsed.path, parsed.params);
+  }
 
-export function setUrlSidePanel(hash, sidepanel) {
-  var parsed = parseUrlHash(hash);
-  parsed.path[0] = sidepanel;
-  return composeUrlHash(parsed.path, parsed.params);
-}
+  static removeUrlParam(hash, key) {
+    var parsed = parseUrlHash(hash);
+    delete parsed.params[key];
+    return composeUrlHash(parsed.path, parsed.params);
+  }
 
-export function setUrlTopic(hash, topic) {
-  var parsed = parseUrlHash(hash);
-  parsed.path[1] = topic;
-  // Close InfoView on topic change.
-  delete parsed.params.info;
-  return composeUrlHash(parsed.path, parsed.params);
+  static setUrlSidePanel(hash, sidepanel) {
+    var parsed = parseUrlHash(hash);
+    parsed.path[0] = sidepanel;
+    return composeUrlHash(parsed.path, parsed.params);
+  }
+
+  static setUrlTopic(hash, topic) {
+    var parsed = parseUrlHash(hash);
+    parsed.path[1] = topic;
+    // Close InfoView on topic change.
+    delete parsed.params.info;
+    return composeUrlHash(parsed.path, parsed.params);
+  }
 }
-// END of hash navigation helper functions