configurable max name/message length (0 for unlimited)

src/config.rs

@@ -10,6 +10,8 @@ pub struct Config {
     pub telegram_bot_token: String,
     pub telegram_chat_id: i64,
     pub honeypot: bool,
+    pub max_name_length: usize,
+    pub max_message_length: usize,
 }
 
 impl Config {
@@ -37,6 +39,14 @@ impl Config {
             honeypot: env::var("BOOK_HONEYPOT")
                 .map(|v| v != "false")
                 .unwrap_or(true),
+            max_name_length: env::var("BOOK_MAX_NAME_LENGTH")
+                .unwrap_or_else(|_| "50".into())
+                .parse()
+                .map_err(|_| "BOOK_MAX_NAME_LENGTH must be a number")?,
+            max_message_length: env::var("BOOK_MAX_MESSAGE_LENGTH")
+                .unwrap_or_else(|_| "1000".into())
+                .parse()
+                .map_err(|_| "BOOK_MAX_MESSAGE_LENGTH must be a number")?,
         })
     }
 }

src/web.rs

@@ -65,14 +65,16 @@ async fn submit(
     if name.is_empty() || message.is_empty() {
         return Html("Name and message are required.".to_string());
     }
-    if name.len() > 50 {
-        return Html("Name is too long (max 50 chars).".to_string());
+    let max_name = state.config.max_name_length;
+    if max_name > 0 && name.len() > max_name {
+        return Html(format!("Name is too long (max {max_name} chars)."));
     }
     if website.len() > 100 {
         return Html("Website is too long (max 100 chars).".to_string());
     }
-    if message.len() > 1000 {
-        return Html("Message is too long (max 1000 chars).".to_string());
+    let max_msg = state.config.max_message_length;
+    if max_msg > 0 && message.len() > max_msg {
+        return Html(format!("Message is too long (max {max_msg} chars)."));
     }
 
     let short_id = &Uuid::new_v4().to_string()[..8];