feat: Proper error handling

- Bump version to 0.8.0
- Added discord error struct
- All errors now implement std::error::Error
- Implemented error handler instead of relying on default
- Fixed bug where you could send answer on a completed quest

discord/src/commands/mod.rs

@@ -1,6 +1,7 @@
-//use poise::{CreateReply, serenity_prelude as serenity};
+use std::error::Error as StdError;
+use poise::CreateReply;
 
-use crate::{Context, Error};
+use crate::{Context, Data, Error};
 
 pub mod quest;
 pub mod init;
@@ -8,10 +9,30 @@ pub mod answer;
 pub mod social;
 pub mod account;
 
-pub const ERROR_MSG: &str = "Server error :(";
-
 #[poise::command(prefix_command)]
 pub async fn register(ctx: Context<'_>) -> Result<(), Error> {
     poise::builtins::register_application_commands_buttons(ctx).await?;
     Ok(())
 }
+
+pub async fn error_handler(error: poise::FrameworkError<'_, Data, Error>) {
+    eprintln!("ERROR:");
+    print_error_recursively(&error);
+    if let Some(ctx) = error.ctx() {
+        let response = match error {
+            poise::FrameworkError::Command { error, .. } => format!("Internal server error: {error}"),
+            _ => format!("Internal server error: {error}"),
+        };
+        if let Err(error) = ctx.send(CreateReply::default().content(response).ephemeral(true)).await {
+            eprintln!("Couldn't send error message: {error}");
+        }
+    }
+}
+
+fn print_error_recursively(error: &impl StdError) {
+    eprintln!("{error}");
+    if let Some(source) = error.source() {
+        eprintln!("source:");
+        print_error_recursively(&source);
+    }
+}