Parse room ID

2 files changed, 30 insertions, 9 deletions

diff --git a/client/elm.json b/client/elm.json
index dea3450..4fdc946 100644
--- a/client/elm.json
+++ b/client/elm.json
@@ -8,12 +8,12 @@
         "direct": {
             "elm/browser": "1.0.2",
             "elm/core": "1.0.5",
-            "elm/html": "1.0.0"
+            "elm/html": "1.0.0",
+            "elm/url": "1.0.0"
         },
         "indirect": {
             "elm/json": "1.1.3",
             "elm/time": "1.0.0",
-            "elm/url": "1.0.0",
             "elm/virtual-dom": "1.0.2"
         }
     },
diff --git a/client/src/Client.elm b/client/src/Client.elm
index 77168c1..cc144e2 100644
--- a/client/src/Client.elm
+++ b/client/src/Client.elm
@@ -1,20 +1,41 @@
 module Client exposing (main)
 
 import Browser
-import Html
+import Html exposing (Html)
+import Url exposing (Url)
 
 type Message
     = Ignore
 
-main : Program () () Message
+type Model
+    = Error String
+    | JoinRoom
+        { id : String
+        }
+
+parseRoomId : Url -> Result String String
+parseRoomId url = case String.split "/" url.path of
+    _ :: "rooms" :: roomId :: _ -> Ok roomId
+    _ -> Err <| "Invalid path: " ++ url.path
+
+view : Model -> List (Html Message)
+view model = case model of
+    Error str ->
+        [ Html.h1 [] [Html.text "Error"]
+        , Html.p [] [Html.text str]
+        ]
+    JoinRoom room ->
+        [ Html.h1 [] [Html.text <| "Room " ++ room.id]
+        ]
+
+main : Program () Model Message
 main = Browser.application
-    { init = \() url key -> ((), Cmd.none)
+    { init = \() url key -> case parseRoomId url of
+        Err str -> (Error <| "Could not parse room ID: " ++ str, Cmd.none)
+        Ok roomId -> (JoinRoom {id = roomId}, Cmd.none)
     , update = \_ model -> (model, Cmd.none)
     , subscriptions = \_ -> Sub.none
-    , view = \model ->
-        { title = "Client"
-        , body = [Html.h1 [] [Html.text "Hi"]]
-        }
+    , view = \model -> {title = "Client", body = view model}
     , onUrlChange = \url -> Ignore
     , onUrlRequest = \urlRequest -> Ignore
     }