Config rework & implementation of greeting + giving role to participant

.env.example

@@ -1 +1,3 @@
 BOT_TOKEN=YOUR-BOT-TOKEN
+MEMBER_ROLE_ID=123
+WELCOME_CHANNEL_ID=321

Cargo.toml

@@ -8,4 +8,6 @@ serenity = "0.12"
 tokio = { version = "1.21.2", features = ["macros", "rt-multi-thread"] }
 tracing = "0.1.23"
 tracing-subscriber = "0.3"
+envy = "0.4"
+serde = { version = "1.0", features = ["derive"] }
 dotenv = "0.15"

src/config.rs

@@ -1,3 +1,8 @@
+use serde::Deserialize;
+
+#[derive(Deserialize, Debug)]
 pub struct Config {
     pub bot_token: String,
+    pub member_role_id: u64,
+    pub welcome_channel_id: u64,
 }

src/main.rs

@@ -1,12 +1,12 @@
 mod commands;
 
 use dotenv::dotenv;
-use std::env;
-
 use serenity::async_trait;
 use serenity::builder::{CreateInteractionResponse, CreateInteractionResponseMessage};
 use serenity::model::application::Interaction;
 use serenity::model::gateway::Ready;
+use serenity::model::guild::Member;
+use serenity::model::id::ChannelId;
 use serenity::model::channel::Message;
 use serenity::model::user::OnlineStatus;
 use serenity::gateway::ActivityData;
@@ -16,7 +16,9 @@ use tracing::{warn, error, info};
 mod config;
 use config::Config;
 
-struct Handler;
+struct Handler {
+    config: Config
+}
 
 #[async_trait]
 impl EventHandler for Handler {
@@ -79,6 +81,16 @@ impl EventHandler for Handler {
         );
 
     }
+
+    async fn guild_member_addition(&self, ctx: Context, new_member: Member) {
+        if let Err(why) = new_member.add_role(&ctx.http, self.config.member_role_id).await {
+            error!("Error adding role: {why:?}");
+        }
+        let channel = ChannelId::new(self.config.welcome_channel_id);
+        if let Err(why) = channel.say(ctx.http, format!("Hello, {}!", new_member.user.name)).await {
+            error!("Error sending message: {why:?}");
+        }
+    }
 }
 
 #[tokio::main]
@@ -87,23 +99,18 @@ async fn main() {
 
     dotenv().ok();
 
-    let bot_token = env::var("BOT_TOKEN")
-        .expect("BOT_TOKEN не найден")
-        .parse()
-        .expect("Неверный формат BOT_TOKEN");
-
-
-    let config = Config {
-        bot_token: bot_token,
+    let config = match envy::from_env::<Config>() {
+        Ok(config) => config,
+        Err(error) => panic!("{:#?}", error)
     };
 
     let intents = GatewayIntents::GUILD_MESSAGES
         | GatewayIntents::DIRECT_MESSAGES
-        | GatewayIntents::MESSAGE_CONTENT;
+        | GatewayIntents::MESSAGE_CONTENT
+        | GatewayIntents::GUILD_MEMBERS;
 
-    let token = &config.bot_token;
-    let mut client = Client::builder(token, intents)
-        .event_handler(Handler)
+    let mut client = Client::builder(&config.bot_token, intents)
+        .event_handler(Handler { config })
         .await
         .expect("Error creating client");