Implements proper 404s.

forum.nim

@@ -1503,6 +1503,33 @@ routes:
     except ForumError as exc:
       resp Http400, $(%exc.data), "application/json"
 
+  get "/t/@id":
+    cond "id" in request.params
+
+    const threadsQuery =
+      sql"""select id from thread where id = ? and isDeleted = 0;"""
+
+    let value = getValue(db, threadsQuery, @"id")
+    if value == @"id":
+      pass
+    else:
+      redirect uri("/404")
+
+  get "/profile/@username":
+    cond "username" in request.params
+
+    const threadsQuery =
+      sql"""select name from person where name = ? and isDeleted = 0;"""
+
+    let value = getValue(db, threadsQuery, @"username")
+    if value == @"username":
+      pass
+    else:
+      redirect uri("/404")
+
+  get "/404":
+    resp Http404, readFile("frontend/karax.html")
+
   get re"/(.+)?":
     resp readFile("frontend/karax.html")
 

frontend/error.nim

@@ -61,4 +61,19 @@ when defined(js):
         state.error = some(PostError(
           errorFields: @[],
           message: "Unknown error occurred."
-        ))
+        ))
+
+  proc render404*(): VNode =
+    result = buildHtml():
+      tdiv(class="empty error"):
+        tdiv(class="empty icon"):
+          italic(class="fas fa-bug fa-5x")
+        p(class="empty-title h5"):
+          text "404 Not Found"
+        p(class="empty-subtitle"):
+          text "Cannot find what you are looking for, it might have been " &
+               "deleted. Sorry!"
+        tdiv(class="empty-action"):
+          a(href="/", onClick=anchorCB):
+            button(class="btn btn-primary"):
+              text "Go back home"

frontend/forum.nim

@@ -71,6 +71,9 @@ proc render(): VNode =
             )
           )
       ),
+      r("/404",
+        (params: Params) => render404()
+      ),
       r("/", (params: Params) => renderThreadList(getLoggedInUser()))
     ])