Reset states properly when navigating to new url.

src/frontend/editbox.nim

@@ -58,10 +58,14 @@ when defined(js):
              (s: int, r: kstring) => onEditPost(s, r, state))
 
   proc render*(state: EditBox, post: Post): VNode =
+    if state.post.id != post.id:
+      state.rawContent = none[kstring]()
+      state.status = Http200
+
     if state.status != Http200:
       return renderError("Couldn't retrieve raw post", state.status)
 
-    if state.rawContent.isNone() or state.post.id != post.id:
+    if state.rawContent.isNone():
       state.post = post
       state.rawContent = none[kstring]()
       var params = @[("id", $post.id)]

src/frontend/forum.nim

@@ -13,9 +13,22 @@ type
     profile: ProfileState
     newThread: NewThread
 
+proc copyLocation(loc: Location): Location =
+  # TODO: It sucks that I had to do this. We need a nice way to deep copy in JS.
+  Location(
+    hash: loc.hash,
+    host: loc.host,
+    hostname: loc.hostname,
+    href: loc.href,
+    pathname: loc.pathname,
+    port: loc.port,
+    protocol: loc.protocol,
+    search: loc.search
+  )
+
 proc newState(): State =
   State(
-    url: window.location,
+    url: copyLocation(window.location),
     profile: newProfileState(),
     newThread: newNewThread()
   )
@@ -25,8 +38,11 @@ proc onPopState(event: dom.Event) =
   # This event is usually only called when the user moves back in their
   # history. I fire it in karaxutils.anchorCB as well to ensure the URL is
   # always updated. This should be moved into Karax in the future.
-  kout(kstring"New URL: ", window.location.href)
-  state.url = window.location
+  kout(kstring"New URL: ", window.location.href, " ", state.url.href)
+  if state.url.href != window.location.href:
+    state = newState() # Reload the state to remove stale data.
+  state.url = copyLocation(window.location)
+
   redraw()
 
 type Params = Table[string, string]

src/frontend/postlist.nim

@@ -307,10 +307,14 @@ when defined(js):
 
   proc renderPostList*(threadId: int, postId: Option[int],
                        currentUser: Option[User]): VNode =
+    if state.list.isSome() and state.list.get().thread.id != threadId:
+      state.list = none[PostList]()
+      state.status = Http200
+
     if state.status != Http200:
       return renderError("Couldn't retrieve posts.", state.status)
 
-    if state.list.isNone or state.list.get().thread.id != threadId:
+    if state.list.isNone:
       var params = @[("id", $threadId)]
       if postId.isSome():
         params.add(("anchor", $postId.get()))

src/frontend/profile.nim

@@ -57,10 +57,14 @@ when defined(js):
     username: string,
     currentUser: Option[User]
   ): VNode =
+    if state.profile.isSome() and state.profile.get().user.name != username:
+      state.profile = none[Profile]()
+      state.status = Http200
+
     if state.status != Http200:
       return renderError("Couldn't retrieve profile.", state.status)
 
-    if state.profile.isNone or state.profile.get().user.name != username:
+    if state.profile.isNone:
       let uri = makeUri("profile.json", ("username", username))
       ajaxGet(uri, @[], (s: int, r: kstring) => onProfile(s, r, state))