refactor(templates/render): Add generic post editing template

Adds a generic template that can be used for submitting, responding to
and editing posts.

src/db.rs

@@ -80,7 +80,7 @@ impl Handler<GetThread> for DbExecutor {
 /// Message used to create a new thread
 pub struct CreateThread {
     pub new_thread: NewThread,
-    pub body: String,
+    pub post: String,
 }
 
 impl Message for CreateThread {
@@ -105,7 +105,7 @@ impl Handler<CreateThread> for DbExecutor {
             // ... then create the first post in the thread.
             let new_post = NewPost {
                 thread_id: thread.id,
-                body: msg.body,
+                body: msg.post,
                 author_name: msg.new_thread.author_name.clone(),
                 author_email: msg.new_thread.author_email.clone(),
             };

src/handlers.rs

@@ -99,7 +99,7 @@ fn anonymous() -> Author {
 #[derive(Deserialize)]
 pub struct NewThreadForm {
     pub title: String,
-    pub body: String,
+    pub post: String,
 }
 
 const NEW_THREAD_LENGTH_ERR: &'static str = "Title and body can not be empty!";
@@ -112,16 +112,16 @@ pub fn submit_thread(state: State<AppState>,
     // Trim whitespace out of inputs:
     let input = NewThreadForm {
         title: input.title.trim().into(),
-        body: input.body.trim().into(),
+        post: input.post.trim().into(),
     };
 
     // Perform simple validation and abort here if it fails:
-    if input.title.is_empty() || input.body.is_empty() {
+    if input.title.is_empty() || input.post.is_empty() {
         return state.renderer
             .send(NewThreadPage {
                 alerts: vec![NEW_THREAD_LENGTH_ERR],
                 title: Some(input.title),
-                body: Some(input.body),
+                post: Some(input.post),
             })
             .flatten()
             .map(|res| HttpResponse::Ok().content_type(HTML).body(res))
@@ -140,7 +140,7 @@ pub fn submit_thread(state: State<AppState>,
 
     let msg = CreateThread {
         new_thread,
-        body: input.body,
+        post: input.post,
     };
 
     state.db.send(msg)
@@ -158,7 +158,7 @@ pub fn submit_thread(state: State<AppState>,
 #[derive(Deserialize)]
 pub struct NewPostForm {
     pub thread_id: i32,
-    pub body: String,
+    pub post: String,
 }
 
 /// This handler receives a "Reply"-form and redirects the user to the
@@ -172,7 +172,7 @@ pub fn reply_thread(state: State<AppState>,
 
     let new_post = NewPost {
         thread_id: input.thread_id,
-        body: input.body.trim().into(),
+        body: input.post.trim().into(),
         author_name: author.name,
         author_email: author.email,
     };

src/render.rs

@@ -159,6 +159,41 @@ impl Handler<ThreadPage> for Renderer {
     }
 }
 
+/// The different types of editing modes supported by the editing
+/// template:
+#[derive(Debug, Serialize)]
+pub enum EditingMode {
+    NewThread,
+    PostReply,
+    EditPost,
+}
+
+impl Default for EditingMode {
+    fn default() -> EditingMode { EditingMode::NewThread }
+}
+
+/// This struct represents the context submitted to the template used
+/// for rendering the new thread, edit post and reply to thread forms.
+#[derive(Default, Serialize)]
+pub struct FormContext {
+    /// Which editing mode is to be used by the template?
+    pub mode: EditingMode,
+
+    /// Potential alerts to display to the user (e.g. input validation
+    /// results)
+    pub alerts: Vec<&'static str>,
+
+    /// Either the title to be used in the subject field or the title
+    /// of the thread the user is responding to.
+    pub title: Option<String>,
+
+    /// Body of the post being edited, if present.
+    pub post: Option<String>,
+
+    /// ID of the thread being replied to or the post being edited.
+    pub id: Option<i32>,
+}
+
 /// Message used to render new thread page.
 ///
 /// It can optionally contain a vector of warnings to display to the
@@ -167,7 +202,7 @@ impl Handler<ThreadPage> for Renderer {
 pub struct NewThreadPage {
     pub alerts: Vec<&'static str>,
     pub title: Option<String>,
-    pub body: Option<String>,
+    pub post: Option<String>,
 }
 
 impl Message for NewThreadPage {
@@ -178,11 +213,13 @@ impl Handler<NewThreadPage> for Renderer {
     type Result = Result<String>;
 
     fn handle(&mut self, msg: NewThreadPage, _: &mut Self::Context) -> Self::Result {
-        let mut ctx = Context::new();
-        ctx.add("alerts", &msg.alerts);
-        ctx.add("title", &msg.title.map(|s| escape_html(&s)));
-        ctx.add("body", &msg.body.map(|s| escape_html(&s)));
-        Ok(self.tera.render("new-thread.html", &ctx)?)
+        let ctx: FormContext = FormContext {
+            alerts: msg.alerts,
+            title: msg.title,
+            post: msg.post,
+            ..Default::default()
+        };
+        Ok(self.tera.render("post.html", &ctx)?)
     }
 }