move Router to its own module

lib/main.js

@@ -1,5 +1,5 @@
-require(["map", "sidebar", "meshstats", "linklist", "simplenodelist", "infobox/main"],
-function (Map, Sidebar, Meshstats, Linklist, SimpleNodelist, Infobox) {
+require(["router", "map", "sidebar", "meshstats", "linklist", "simplenodelist", "infobox/main"],
+function (Router, Map, Sidebar, Meshstats, Linklist, SimpleNodelist, Infobox) {
   main()
 
   function main() {
@@ -37,6 +37,7 @@ function (Map, Sidebar, Meshstats, Linklist, SimpleNodelist, Infobox) {
 
       var p = Promise.all(urls.map(getJSON))
       p.then(handle_data(sidebar, meshstats, linklist, newnodeslist, lostnodeslist, infobox, map, router))
+       .then(function () { router.loadState(window.location.hash) })
     })
   }
 
@@ -111,117 +112,7 @@ function (Map, Sidebar, Meshstats, Linklist, SimpleNodelist, Infobox) {
       linklist.setData(links)
       newnodeslist.setData(newnodes)
       lostnodeslist.setData(lostnodes)
-
-      var historyDict = { nodes: {}, links: {} }
-
-      nodes.forEach( function (d) {
-        historyDict.nodes[d.nodeinfo.node_id] = d
-      })
-
-      links.forEach( function (d) {
-        historyDict.links[linkId(d)] = d
-      })
-
-      router.reset(false)
-
-      gotoHistory(router, historyDict, window.location.hash)
-
-      window.onpopstate = function (d) {
-        gotoHistory(router, historyDict, d.state)
-      }
+      router.setData(nodes, links)
     }
   }
-
-  function pushHistory(d) {
-    var s = "#!"
-
-    if (d) {
-      if ("node" in d)
-        s += "n:" + d.node.nodeinfo.node_id
-
-      if ("link" in d)
-        s += "l:" + linkId(d.link)
-    }
-
-    window.history.pushState(s, undefined, s)
-  }
-
-  function gotoHistory(router, dict, s) {
-    if (!s.startsWith("#!"))
-      return
-
-    s = s.slice(2)
-
-    var args = s.split(":")
-
-    if (args[0] === "n") {
-      var id = args[1]
-
-      if (id in dict.nodes)
-        router.node(dict.nodes[id], true, false)()
-    }
-
-    if (args[0] === "l") {
-      var id = args[1]
-
-      if (id in dict.links)
-        router.link(dict.links[id], true, false)()
-    }
-  }
-
-  function Router(config, nodes) {
-    var targets = []
-    var self = this
-
-    var infobox
-
-    function resetView(push) {
-      push = trueDefault(push)
-
-      targets.forEach( function (t) {
-        t.resetView()
-      })
-
-      if (push)
-        pushHistory()
-    }
-
-    function gotoNode(d, showMap, push) {
-      showMap = trueDefault(showMap)
-      push = trueDefault(push)
-
-      targets.forEach( function (t) {
-        t.gotoNode(d)
-      })
-
-      if (push)
-        pushHistory( { node: d })
-
-      return false
-    }
-
-    function gotoLink(d, showMap, push) {
-      showMap = trueDefault(showMap)
-      push = trueDefault(push)
-
-      targets.forEach( function (t) {
-        t.gotoLink(d)
-      })
-
-      if (push)
-        pushHistory( { link: d })
-
-      return false
-    }
-
-    self.node = function (d, m, p) { return function () { return gotoNode(d, m, p) }}
-    self.link = function (d, m, p) { return function () { return gotoLink(d, m, p) }}
-    self.reset = resetView
-    self.addMarkers = function (d) {
-                        markers = d
-                      }
-    self.addTarget = function (d) { targets.push(d) }
-
-    return self
-  }
 })

lib/router.js

@@ -0,0 +1,112 @@
+define(function () {
+  return function (config) {
+    var objects = { nodes: {}, links: {} }
+    var targets = []
+    var self = this
+
+    function resetView(push) {
+      push = trueDefault(push)
+
+      targets.forEach( function (t) {
+        t.resetView()
+      })
+
+      if (push)
+        saveState()
+    }
+
+    function gotoNode(d, showMap, push) {
+      showMap = trueDefault(showMap)
+      push = trueDefault(push)
+
+      targets.forEach( function (t) {
+        t.gotoNode(d)
+      })
+
+      if (push)
+        saveState( { node: d })
+
+      return false
+    }
+
+    function gotoLink(d, showMap, push) {
+      showMap = trueDefault(showMap)
+      push = trueDefault(push)
+
+      targets.forEach( function (t) {
+        t.gotoLink(d)
+      })
+
+      if (push)
+        saveState( { link: d })
+
+      return false
+    }
+
+    function saveState(d) {
+      var s = "#!"
+
+      if (d) {
+        if ("node" in d)
+          s += "n:" + d.node.nodeinfo.node_id
+
+        if ("link" in d)
+          s += "l:" + linkId(d.link)
+      }
+
+      window.history.pushState(s, undefined, s)
+    }
+
+    function loadState(s) {
+      if (!s)
+        return
+
+      if (!s.startsWith("#!"))
+        return
+
+      var args = s.slice(2).split(":")
+
+      if (args.length == 1 && args[0] == "")
+        resetView(false)
+
+      if (args[0] === "n") {
+        var id = args[1]
+
+        if (id in objects.nodes)
+          gotoNode(objects.nodes[id], true, false)
+      }
+
+      if (args[0] === "l") {
+        var id = args[1]
+
+        if (id in objects.links)
+          gotoLink(objects.links[id], true, false)
+      }
+    }
+
+    self.node = function (d, m, p) { return function () { return gotoNode(d, m, p) }}
+    self.link = function (d, m, p) { return function () { return gotoLink(d, m, p) }}
+    self.reset = resetView
+    self.addMarkers = function (d) {
+                        markers = d
+                      }
+    self.addTarget = function (d) { targets.push(d) }
+
+    self.setData = function (nodes, links) {
+      objects.nodes = {}
+      objects.links = {}
+
+      nodes.forEach( function (d) {
+        objects.nodes[d.nodeinfo.node_id] = d
+      })
+
+      links.forEach( function (d) {
+        objects.links[linkId(d)] = d
+      })
+    }
+
+    window.onpopstate = function (d) { loadState(d.state) }
+
+    return self
+  }
+})