problem UID in query params

Cargo.toml

@@ -1,9 +1,9 @@
 [workspace]
-resolver = "2"
+resolver = "3"
 members = ["crates/ascend", "crates/moonboard-parser"]
 
 [workspace.package]
-edition = "2021"
+edition = "2024"
 authors = ["Asger Juul Brunshøj <asgerbrunshoj@gmail.com>"]
 
 [workspace.dependencies.moonboard-parser]

crates/ascend/src/pages/routes.rs

@@ -3,7 +3,6 @@ use crate::components::header::HeaderItem;
 use crate::components::header::HeaderItems;
 use crate::components::header::StyledHeader;
 use crate::models;
-use crate::models::WallUid;
 use leptos::Params;
 use leptos::prelude::*;
 use leptos_router::params::Params;

crates/ascend/src/pages/wall.rs

@@ -22,9 +22,12 @@ struct RouteParams {
 pub fn Wall() -> impl IntoView {
     tracing::debug!("Enter");
 
-    let params = leptos_router::hooks::use_params::<RouteParams>();
+    let route_params = leptos_router::hooks::use_params::<RouteParams>();
+
+    let (problem_uid, set_problem_uid) = leptos_router::hooks::query_signal::<models::ProblemUid>("problem");
+
     let wall_uid = Signal::derive(move || {
-        params
+        route_params
             .get()
             .expect("gets wall_uid from URL")
             .wall_uid
@@ -44,20 +47,38 @@ pub fn Wall() -> impl IntoView {
         v.and_then(Result::ok)
     });
 
+    let fn_next_problem = move |wall: &models::Wall| {
+        set_problem_uid.set(wall.random_problem());
+    };
+
+    // Set a problem when wall is set (loaded)
     Effect::new(move |_prev_value| {
         problem_action.value().write_only().set(None);
-        match wall.get() {
+
+        match &*wall.read() {
             Some(Ok(wall)) => {
-                if let Some(problem_uid) = wall.random_problem() {
-                    tracing::debug!("dispatching from effect");
-                    problem_action.dispatch((wall.uid, problem_uid));
+                if problem_uid.get().is_none() {
+                    tracing::debug!("Setting next problem");
+                    fn_next_problem(wall);
                 }
             }
-            Some(Err(_err)) => {}
+            Some(Err(err)) => {
+                tracing::error!("Error getting wall: {err}");
+            }
             None => {}
         }
     });
 
+    // On change of problem UID, dispatch an action to fetch the problem
+    Effect::new(move |_prev_value| match problem_uid.get() {
+        Some(problem_uid) => {
+            problem_action.dispatch((wall_uid.get(), problem_uid));
+        }
+        None => {
+            problem_action.value().write_only().set(None);
+        }
+    });
+
     let header_items = move || HeaderItems {
         left: vec![],
         middle: vec![HeaderItem {
@@ -93,12 +114,7 @@ pub fn Wall() -> impl IntoView {
 
                                 <div>
                                     <Button
-                                        onclick=move |_| {
-                                            if let Some(problem_uid) = wall.random_problem() {
-                                                tracing::info!("dispatching from button click handler");
-                                                problem_action.dispatch((wall.uid, problem_uid));
-                                            }
-                                        }
+                                        onclick=move |_| fn_next_problem(&wall)
                                         text="➤ Next problem"
                                     />
 

flake.lock

@@ -10,11 +10,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1739793388,
-        "narHash": "sha256-mf0FJ7JJi5gTUFz0SyWF8bqqonxoFD2DG9D785uyYJM=",
+        "lastModified": 1740139153,
+        "narHash": "sha256-Xa1wCQBbsFHCaXgVBjtraZcWywuXBN+YhdqGle4nLVc=",
         "owner": "plul",
         "repo": "basecamp",
-        "rev": "f0f702ef6d5e8446eb8cd64e56fe1fe3cfbc677d",
+        "rev": "0a29da733dc2f7b386dd3667b63a51c55238fbfd",
         "type": "github"
       },
       "original": {
@@ -25,11 +25,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1738797219,
-        "narHash": "sha256-KRwX9Z1XavpgeSDVM/THdFd6uH8rNm/6R+7kIbGa+2s=",
+        "lastModified": 1740396192,
+        "narHash": "sha256-ATMHHrg3sG1KgpQA5x8I+zcYpp5Sf17FaFj/fN+8OoQ=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "1da52dd49a127ad74486b135898da2cef8c62665",
+        "rev": "d9b69c3ec2a2e2e971c534065bdd53374bd68b97",
         "type": "github"
       },
       "original": {
@@ -53,11 +53,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1738895285,
-        "narHash": "sha256-4Ukr4reJfQ67c6QqIxbX47wnPIGxE8BXCAEPu1C3MFM=",
+        "lastModified": 1740450604,
+        "narHash": "sha256-T/lqASXzCzp5lJISCUw+qwfRmImVUnhKgAhn8ymRClI=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "85f3aed5f4b8eb312c6e8fe8c476bac248aed75f",
+        "rev": "5961ca311c85c31fc5f51925b4356899eed36221",
         "type": "github"
       },
       "original": {