basic ping/pong bot

src/main.rs

@@ -1,3 +1,30 @@
-fn main() {
-    println!("Hello, world!");
+use serenity::model::channel::Message;
+use serenity::prelude::*;
+use std::fs::File;
+use std::io::{self, prelude::*, BufReader};
+
+struct Handler;
+
+impl EventHandler for Handler {
+    fn message(&self, ctx: Context, msg: Message) {
+        if msg.content == "!ping" {
+            if let Err(cause) = msg.channel_id.say(&ctx.http, "pong") {
+                println!("error sending message {:?}", cause);
+            }
+        }
+    }
+}
+
+pub fn main() {
+    let mut client = Client::new(
+        read_token().expect("Could not read token from file `secret` in current directory"),
+        Handler,
+    )
+    .expect("Error creating client");
+    client.start().expect("Could not connect to discord");
+}
+
+fn read_token() -> io::Result<String> {
+    let reader = BufReader::new(File::open("secret")?);
+    reader.lines().next().unwrap()
 }