re-write create_milestone as functional component

crates/frontend/src/components/create_milestone.rs

@@ -1,127 +1,113 @@
-use super::error::error_provider::get_error_context;
+use crate::components::error::error_provider::ErrorContext;
 use crate::services::rest::RestService;
-use crate::services::rest::RestServiceError;
 use common::CreateMilestone;
+use std::rc::Rc;
 use wasm_bindgen::JsCast;
 use wasm_bindgen_futures::spawn_local;
 use web_sys::HtmlInputElement;
 use yew::html;
+use yew::prelude::*;
 use yew::Callback;
-use yew::Component;
 use yew::Html;
-use yew::NodeRef;
-use yew_router::scope_ext::RouterScopeExt;
+use yew_router::prelude::use_navigator;
 
-#[derive(Debug)]
-pub enum Msg {
-    Submit,
-    SubmitResult(Result<(), RestServiceError>),
-    UpdateInput(String),
-}
+#[derive(Properties, PartialEq)]
+pub struct Props;
 
-#[derive(Default)]
-pub struct CreateMilestoneComponent {
-    input_value: String,
-    input_ref: NodeRef,
+#[function_component]
+pub fn CreateMilestoneComponent(_: &Props) -> Html {
+    let nav = use_navigator().expect("cannot get navigator");
+    let err_ctx = Rc::new(use_context::<ErrorContext>());
 
-    /// Submitted and awaiting response
-    awaiting_response: bool,
-}
-impl Component for CreateMilestoneComponent {
-    type Message = Msg;
-    type Properties = ();
-
-    fn create(_ctx: &yew::Context<Self>) -> Self {
-        Self::default()
-    }
-
-    fn rendered(&mut self, _ctx: &yew::Context<Self>, first_render: bool) {
-        if first_render {
-            if let Some(input_element) = self.input_ref.get() {
+    let input_ref = use_node_ref();
+    // Focus input after it is rendered
+    {
+        let input_ref = input_ref.clone();
+        use_effect(move || {
+            if let Some(input_element) = input_ref.get() {
                 let input_element = input_element
                     .dyn_into::<HtmlInputElement>()
                     .expect("Failed to cast input element");
                 input_element.focus().expect("Failed to focus input");
             }
-        }
+
+            // effect destructor
+            || {}
+        });
     }
 
-    fn update(&mut self, ctx: &yew::Context<Self>, msg: Self::Message) -> bool {
-        match msg {
-            Msg::Submit => {
-                log::info!("Creating milestone");
-                let Ok(goal) = self.input_value.parse::<f64>() else { return false; };
+    let input_value = use_state(String::default);
+    let awaiting_response = use_state(|| false);
 
-                let goal = goal as usize;
-                let payload = CreateMilestone { goal };
-                let link = ctx.link().clone();
-                spawn_local(async move {
-                    let res = RestService::create_milestone(payload).await;
-                    link.send_message(Msg::SubmitResult(res));
-                });
-                self.awaiting_response = true;
-
-                true
-            }
-            Msg::SubmitResult(result) => {
-                match result {
-                    Ok(_response) => {
-                        let nav = ctx.link().navigator().unwrap();
-                        nav.push(&crate::Route::Admin)
-                    }
-                    Err(err) => {
-                        if let Some(err_ctx) = get_error_context(ctx) {
-                            err_ctx.dispatch(err.to_string());
-                        }
-                    }
-                };
-                self.awaiting_response = false;
-                true
-            }
-            Msg::UpdateInput(value) => {
-                self.input_value = value;
-                true
-            }
-        }
-    }
-
-    fn view(&self, ctx: &yew::Context<Self>) -> Html {
-        let link = ctx.link().clone();
-        let nav = ctx.link().navigator().unwrap();
-
-        let onclick_go_back = Callback::from(move |_: web_sys::MouseEvent| {
+    let onclick_go_back = {
+        let nav = nav.clone();
+        Callback::from(move |_: web_sys::MouseEvent| {
             nav.push(&crate::Route::Admin);
-        });
+        })
+    };
 
-        let onsubmit = link.callback(|e: web_sys::SubmitEvent| {
+    let onsubmit = {
+        let input_value = input_value.clone();
+        let awaiting_response = awaiting_response.clone();
+
+        Callback::from(move |e: yew::SubmitEvent| {
             e.prevent_default();
-            Msg::Submit
-        });
 
-        let oninput = link.callback(|e: web_sys::InputEvent| {
+            log::info!("Creating milestone");
+            let Ok(goal) = input_value.parse::<f64>() else {
+                log::error!("Input parse error");
+                return;
+            };
+
+            let goal = goal as usize;
+            let payload = CreateMilestone { goal };
+            {
+                let nav = nav.clone();
+                let err_ctx = Rc::clone(&err_ctx);
+                awaiting_response.set(true);
+                let awaiting_response = awaiting_response.clone();
+                spawn_local(async move {
+                    match RestService::create_milestone(payload).await {
+                        Ok(_response) => nav.push(&crate::Route::Admin),
+                        Err(err) => {
+                            if let Some(err_ctx) = &*err_ctx {
+                                err_ctx.dispatch(err.to_string());
+                            }
+                        }
+                    };
+                    awaiting_response.set(false);
+                });
+            }
+        })
+    };
+
+    let oninput = {
+        let input_value = input_value.clone();
+
+        Callback::from(move |e: web_sys::InputEvent| {
             let Some(input) = e
                     .target()
                     .and_then(|t| t.dyn_into::<web_sys::HtmlInputElement>().ok()) else { unreachable!() };
-            Msg::UpdateInput(input.value())
-        });
+            input_value.set(input.value());
+        })
+    };
 
-        html! {
-            <>
-            <div class="row">
-                <button onclick={onclick_go_back} class="button">{"Back"}</button>
+    html! {
+        <>
+        <div class="row">
+            <button onclick={onclick_go_back} class="button">{"Back"}</button>
+        </div>
+
+        <form {onsubmit} >
+          <hr />
+          <div class="row">
+            <div class="twelve columns">
+              <label for="milestoneInput">{"New milestone"}</label>
+              <input ref={input_ref.clone()} {oninput} value={input_value.to_string()} class="u-full-width" type="number" id="milestoneInput" />
             </div>
-
-            <form {onsubmit} >
-              <hr />
-              <div class="row">
-                <div class="twelve columns">
-                  <label for="milestoneInput">{"New milestone"}</label>
-                  <input ref={self.input_ref.clone()} {oninput} value={self.input_value.to_string()} class="u-full-width" type="number" id="milestoneInput" />
-                </div>
-              </div>
-              <input class="button-primary" type="submit" value="Submit" disabled={self.awaiting_response} />
-            </form>
-            </>
-        }
+          </div>
+          <input class="button-primary" type="submit" value="Submit" disabled={*awaiting_response} />
+        </form>
+        </>
     }
 }

todo.md

@@ -1,3 +1 @@
-- UI errors from failed requests
 - websocket reconnect
-- make it an admin interface, and move the new + remove buttons there, as well as milestone management