Update internals for reply support, add error reasons, minor changes

demo/a/index.html

@@ -1,3 +1,4 @@
+<link rel="icon" href="data:,">
 <meta name="soudan-content-id" content="a">
 <link rel="stylesheet" href="https://unpkg.com/sakura.css/css/sakura-dark.css" type="text/css">
 <link rel="stylesheet" href="/style.css">

demo/b/index.html

@@ -1,3 +1,4 @@
+<link rel="icon" href="data:,">
 <meta name="soudan-content-id" content="b">
 <link rel="stylesheet" href="https://unpkg.com/sakura.css/css/sakura-dark.css" type="text/css">
 <link rel="stylesheet" href="/style.css">

demo/soudan.js

@@ -4,6 +4,7 @@ document.getElementById("soudan").innerHTML = `<h3>Make a comment</h3>
 	<label for="email">Email:</label> <input type="email" name="email">
 	<label for="text">Comment:</label>
 	<textarea name="text" required></textarea>
+	<input type="hidden" name="parent">
 	<input type="submit">
 </form>
 <h3 id="soudan-comments-header">Comments</h3>

src/comment.rs

@@ -6,6 +6,8 @@ use validator::Validate;
 #[derive(Serialize, Deserialize, Validate)]
 #[serde(rename_all = "camelCase")]
 pub struct Comment {
+    #[serde(skip_deserializing)]
+    pub id: Option<i64>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub author: Option<String>, // None is Anonymous
     #[serde(rename(serialize = "gravatar"))]
@@ -19,7 +21,13 @@ pub struct Comment {
     #[serde(with = "ts_seconds_option")]
     #[serde(skip_serializing_if = "Option::is_none")]
     pub timestamp: Option<DateTime<Utc>>,
+    #[serde(skip_serializing)]
     pub content_id: String,
+    #[serde(skip_serializing)]
+    pub parent: Option<i64>,
+    #[serde(skip_serializing_if = "<[_]>::is_empty")]
+    #[serde(skip_deserializing)]
+    pub replies: Vec<Comment>,
 }
 
 fn serialize_gravatar<S>(email: &Option<String>, s: S) -> Result<S::Ok, S::Error>

src/database.rs

@@ -18,7 +18,8 @@ impl Database {
                 author     TEXT,
                 text       TEXT NOT NULL,
                 timestamp  DATETIME DEFAULT CURRENT_TIMESTAMP,
-                content_id TEXT NOT NULL
+                content_id TEXT NOT NULL,
+                parent     INTEGER
             )",
             params![],
         )?;
@@ -27,14 +28,33 @@ impl Database {
 
     pub fn get_comments(&self, content_id: &str) -> Result<Vec<Comment>> {
         self.conn
-            .prepare(&format!("SELECT author, email, text, timestamp FROM comment WHERE content_id='{content_id}' ORDER BY timestamp DESC"))?
+            .prepare(&format!("SELECT id, author, email, text, timestamp FROM comment WHERE content_id='{content_id}' AND parent IS NULL ORDER BY timestamp DESC"))?
             .query_map([], |row| {
+                let id = row.get::<usize, Option<i64>>(0)?.unwrap();
+                let replies = self.conn
+                    .prepare(&format!("SELECT id, author, email, text, timestamp FROM comment WHERE parent={id} ORDER BY timestamp DESC"))?
+                    .query_map([], |row| {
+                        Ok(Comment {
+                            id: row.get(0)?,
+                            author: row.get(1)?,
+                            email: row.get(2)?,
+                            text: row.get(3)?,
+                            timestamp: row.get(4)?,
+                            content_id: content_id.to_owned(),
+                            parent: Some(id),
+                            replies: Vec::new(), // no recursion
+                        })
+                    })?
+                    .collect::<Result<Vec<Comment>>>()?;
                 Ok(Comment {
-                    author: row.get(0)?,
-                    email: row.get(1)?,
-                    text: row.get(2)?,
-                    timestamp: row.get(3)?,
+                    id: Some(id),
+                    author: row.get(1)?,
+                    email: row.get(2)?,
+                    text: row.get(3)?,
+                    timestamp: row.get(4)?,
                     content_id: content_id.to_owned(),
+                    parent: None,
+                    replies,
                 })
             })?
             .collect()

src/main.rs

@@ -23,20 +23,19 @@ fn get_db<'a>(
     data: &'a web::Data<AppState>,
     request: &HttpRequest,
 ) -> Result<MutexGuard<'a, Database>, HttpResponse> {
-    // all the .into() are converting from HttpResponseBuilder to HttpResponse
     let origin = match request.head().headers().get("Origin") {
         Some(origin) => match origin.to_str() {
             Ok(origin) => origin,
-            Err(_) => return Err(HttpResponse::BadRequest().into()),
+            Err(_) => return Err(HttpResponse::BadRequest().reason("bad origin").finish()),
         },
-        None => return Err(HttpResponse::BadRequest().into()),
+        None => return Err(HttpResponse::BadRequest().reason("bad origin").finish()),
     };
     match data.databases.get(origin) {
         Some(database) => Ok(match database.lock() {
             Ok(database) => database,
-            Err(_) => return Err(HttpResponse::InternalServerError().into()),
+            Err(_) => return Err(HttpResponse::InternalServerError().reason("database error").finish()),
         }),
-        None => return Err(HttpResponse::BadRequest().into()),
+        None => return Err(HttpResponse::BadRequest().reason("bad origin").finish()),
     }
 }
 
@@ -69,19 +68,19 @@ async fn post_comment(
         Ok(text) => {
             let PostCommentsRequest { url, comment } = match serde_json::from_str(&text) {
                 Ok(req) => req,
-                Err(_) => return HttpResponse::BadRequest().into(),
+                Err(_) => return HttpResponse::BadRequest().reason("invalid request body").finish(),
             };
             if comment.validate().is_err() {
-                return HttpResponse::BadRequest().into();
+                return HttpResponse::BadRequest().reason("invalid comment field(s)").finish();
             }
             let origin = match request.head().headers().get("Origin") {
                 Some(origin) => match origin.to_str() {
                     Ok(origin) => origin,
                     // If the Origin is not valid ASCII, it is a bad request not sent from a browser
-                    Err(_) => return HttpResponse::BadRequest().into(),
+                    Err(_) => return HttpResponse::BadRequest().reason("bad origin").finish(),
                 },
                 // If there is no Origin header, it is a bad request not sent from a browser
-                None => return HttpResponse::BadRequest().into(),
+                None => return HttpResponse::BadRequest().reason("bad origin").finish(),
             };
             // Check to see if provided URL is in scope.
             // This is to prevent malicious requests that try to get server to fetch external websites.
@@ -93,18 +92,18 @@ async fn post_comment(
                         break 'outer;
                     }
                 }
-                return HttpResponse::BadRequest().into();
+                return HttpResponse::BadRequest().reason("url out of scope").finish();
             }
             match get_page_data(&url).await {
                 Ok(page_data_option) => match page_data_option {
                     Some(page_data) => {
                         if page_data.content_id != comment.content_id {
-                            return HttpResponse::BadRequest().into();
+                            return HttpResponse::BadRequest().reason("content ids don't match").finish();
                         }
                     }
-                    None => return HttpResponse::BadRequest().into(),
+                    None => return HttpResponse::BadRequest().reason("url invalid").finish(), // e.g. 404
                 },
-                Err(_) => return HttpResponse::InternalServerError().into(),
+                Err(_) => return HttpResponse::InternalServerError().reason("failed to get page data").finish(),
             };
             let database = match get_db(&data, &request) {
                 Ok(database) => database,
@@ -113,7 +112,7 @@ async fn post_comment(
             database.create_comment(&comment).unwrap();
             HttpResponse::Ok().into()
         }
-        Err(_) => HttpResponse::BadRequest().into(),
+        Err(_) => HttpResponse::BadRequest().reason("failed to parse request body").finish(),
     }
 }