Simplify bot structure

.env.example

@@ -2,7 +2,7 @@
 DISCORD_TOKEN="Enter your Discord secret token"
 
 # MongoDB connection string
-MONGO_URI="Enter your Mongo connection string"
+MONGODB_URI="Enter your Mongo connection string"
 
 # YorokoBot database name (if not set in Mongo URI)
-MONGO_DEFAULT_DB="Enter the MongoDB database name"
+MONGODB_DATABASE="Enter the MongoDB database name"

src/client.rs

@@ -1,6 +1,6 @@
 //! Module containing the Yorokobot client and used structs
 
-use crate::{database::Client as DatabaseClient, errors::ClientError, DatabaseCredentials};
+use crate::database::Client as DatabaseClient;
 
 use crate::discord::client::DiscordClient;
 /// Yorokobot's client.
@@ -33,23 +33,17 @@ pub struct Client {
     database_client: DatabaseClient,
 }
 
-/// Yorokobot connection credentials
-pub struct ClientCredentials {
-    /// MongoDB connection string.
-    pub db_credentials: DatabaseCredentials,
-}
-
 impl Client {
     /// Create a Yorokobot client
-    pub async fn new(credentials: ClientCredentials) -> Result<Client, ClientError> {
+    pub async fn new() -> Client {
         let discord_client = DiscordClient::new().await;
 
-        let database_client = DatabaseClient::new(credentials.db_credentials);
+        let database_client = DatabaseClient::new();
 
-        Ok(Client {
+        Client {
             discord_client,
             database_client,
-        })
+        }
     }
 
     /// Start connection to Discord API.
@@ -59,10 +53,8 @@ impl Client {
     }
 
     /// Connect client to the Mongo database then to the Discord API.
-    pub async fn connect(&mut self) -> Result<(), ClientError> {
-        self.database_client.connect().await?;
+    pub async fn connect(&mut self) {
+        self.database_client.connect().await;
         self.connect_discord().await;
-
-        Ok(())
     }
 }

src/database.rs

@@ -3,4 +3,4 @@
 pub mod client;
 mod models;
 
-pub use {client::Client, mongodb::options::ClientOptions as DatabaseCredentials};
+pub use client::Client;

src/database/client.rs

@@ -8,8 +8,6 @@ use mongodb::{
 use serde::{Deserialize, Serialize};
 
 use crate::environment::get_env_variable;
-use crate::errors::ClientError;
-use crate::DatabaseCredentials;
 
 use super::models::{YorokobotModel, COLLECTIONS_NAMES};
 
@@ -17,31 +15,29 @@ use super::models::{YorokobotModel, COLLECTIONS_NAMES};
 pub struct Client {
     mongo_client: Option<MongoClient>,
     database: Option<Database>,
-    credentials: DatabaseCredentials,
 }
 
 impl Client {
     /// Create a new database client
-    pub fn new(credentials: DatabaseCredentials) -> Client {
+    pub fn new() -> Client {
         Client {
-            credentials,
             mongo_client: None,
             database: None,
         }
     }
 
     /// Connect the client
-    pub async fn connect(&mut self) -> Result<(), ClientError> {
-        self.mongo_client = match MongoClient::with_options(self.credentials.to_owned()) {
+    pub async fn connect(&mut self) {
+        self.mongo_client = match MongoClient::with_uri_str(get_env_variable("MONGODB_URI")).await {
             Ok(c) => Some(c),
-            Err(e) => return Err(ClientError::Database(e)),
+            Err(e) => panic!("Failed to connect to Mongo database: {e}"),
         };
 
         self.database = Some(
             self.mongo_client
                 .as_ref()
                 .unwrap()
-                .database(get_env_variable("MONGO_DEFAULT_DB").as_str()),
+                .database(get_env_variable("MONGODB_DATABASE").as_str()),
         );
 
         // TODO:
@@ -49,8 +45,6 @@ impl Client {
         // Ex: DatabaseConnection
 
         self.check_init_error().await;
-
-        Ok(())
     }
 
     async fn check_init_error(&mut self) {

src/errors.rs

@@ -1,14 +0,0 @@
-//! Common Yorokobot errors
-
-pub use mongodb::error::Error as DatabaseError;
-pub use serenity::prelude::SerenityError as DiscordError;
-
-/// The kind of errors that can be returned by Client::new
-#[derive(Debug)]
-pub enum ClientError {
-    /// Serenity error while building client
-    Discord(DiscordError),
-
-    ///Mongo error while parsing options
-    Database(DatabaseError),
-}

src/lib.rs

@@ -10,9 +10,5 @@ mod client;
 mod database;
 mod discord;
 mod environment;
-pub mod errors;
 
-pub use crate::{
-    client::{Client, ClientCredentials},
-    database::DatabaseCredentials,
-};
+pub use crate::client::Client;

src/main.rs

@@ -1,51 +1,11 @@
-use log::error;
-use std::env;
-
-use yorokobot::{errors::ClientError, Client, ClientCredentials, DatabaseCredentials};
+use yorokobot::Client;
 
 #[tokio::main]
-async fn main() -> std::process::ExitCode {
+async fn main() {
     // Start the logger
     log4rs::init_file("log4rs_config.yaml", Default::default()).unwrap();
 
-    let mongodb_uri = match env::var("MONGODB_URI") {
-        Ok(u) => u,
-        Err(_) => {
-            error!(target: "bot_warn_errors", "Could not find MONGODB_URI environment variable.");
-            return std::process::ExitCode::FAILURE;
-        }
-    };
+    let mut client = Client::new().await;
 
-    let db_credentials = match DatabaseCredentials::parse(mongodb_uri).await {
-        Ok(c) => c,
-        Err(_) => {
-            error!(target: "bot_warn_errors", "Could not parse database credentials.");
-            return std::process::ExitCode::FAILURE;
-        }
-    };
-
-    let credentials = ClientCredentials { db_credentials };
-
-    let mut client = match Client::new(credentials).await {
-        Ok(c) => c,
-        Err(_) => {
-            error!(target: "bot_warn_errors", "Could not instantiate the bot client.");
-            return std::process::ExitCode::FAILURE;
-        }
-    };
-
-    if let Err(error) = client.connect().await {
-        match error {
-            ClientError::Database(e) => {
-                error!(target: "bot_warn_errors", "Could not connect to database: {:?}", e)
-            }
-            ClientError::Discord(e) => {
-                error!(target: "bot_warn_errors", "Could not connect to Discord: {:?}", e)
-            }
-        };
-
-        return std::process::ExitCode::FAILURE;
-    }
-
-    std::process::ExitCode::SUCCESS
+    client.connect().await;
 }