basic pingpong bot

Cargo.toml

@@ -4,3 +4,6 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+serenity = "0.12.5"
+tokio = { version = "1.21.2", features = ["macros", "rt-multi-thread"] }
+dotenv = "0.15.0"

src/main.rs

@@ -1,3 +1,40 @@
-fn main() {
-    println!("Hello, world!");
+use std::env;
+
+use dotenv::dotenv;
+use serenity::{
+    all::{Context, EventHandler, GatewayIntents, Message, GATEWAY_VERSION},
+    async_trait, Client,
+};
+
+struct Handler;
+
+#[async_trait]
+impl EventHandler for Handler {
+    async fn message(&self, ctx: Context, msg: Message) {
+        if msg.content == "!ping" {
+            println!("found PING!");
+            if let Err(why) = msg.channel_id.say(&ctx.http, "Pong!").await {
+                println!("Error sending message: {why:?}");
+            }
+        }
+    }
+}
+
+#[tokio::main]
+async fn main() {
+    println!("Hello, world!");
+    dotenv().ok();
+    let token = env::var("DISCORD_TOKEN").expect("Expected a token in the environment");
+    let intens = GatewayIntents::GUILD_MESSAGES
+        | GatewayIntents::DIRECT_MESSAGES
+        | GatewayIntents::MESSAGE_CONTENT;
+
+    let mut client = Client::builder(&token, intens)
+        .event_handler(Handler)
+        .await
+        .expect("Error creating client");
+
+    if let Err(why) = client.start().await {
+        println!("error: {why:?}");
+    }
 }