initial/old version

.gitignore

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+/target

Cargo.toml

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+[package]
+name = "basedbot"
+version = "0.1.0"
+authors = ["kageru <kageru@encode.moe>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+serenity = "0.8.6"
+lazy_static = "1.4.0"
+regex = "1.3.9"

src/main.rs

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+use serenity::model::id::GuildId;
+use serenity::model::prelude::*;
+use serenity::prelude::*;
+use serenity::Client;
+use std::sync::Mutex;
+use std::time::{Duration, Instant};
+#[macro_use]
+extern crate lazy_static;
+
+struct Handler;
+
+static BASED_URL: &str =
+    "https://cdn.discordapp.com/attachments/246368272327507979/738083492474257538/based.jpg";
+static CRINGE_URL: &str =
+    "https://cdn.discordapp.com/attachments/246368272327507979/738083495162806282/cringe.jpg";
+static BOTH_URL: &str =
+    "https://cdn.discordapp.com/attachments/300723600632053761/739835069417390110/based.jpg";
+static COOLDOWN: Duration = Duration::from_secs(3600);
+
+lazy_static! {
+    static ref LAST_SENT: Mutex<Instant> = Mutex::new(Instant::now() - COOLDOWN);
+    static ref SERVER_ID: GuildId = GuildId(std::env::args().nth(1).unwrap().parse().unwrap());
+}
+
+impl EventHandler for Handler {
+    fn message(&self, ctx: Context, message: Message) {
+        if let Some(msg) = optional_reply(&message) {
+            if let Err(e) = message.channel_id.say(&ctx, msg) {
+                println!("Could not send image, error was: {:?}", e);
+            }
+        }
+    }
+}
+
+fn is_cringe(s: &str) -> bool {
+    s.contains("cringe")
+}
+
+fn is_based(s: &str) -> bool {
+    (s.contains("based") || s.contains("basiert")) && !s.contains("based on")
+}
+
+fn optional_reply(msg: &Message) -> Option<&str> {
+    if msg.guild_id == Some(*SERVER_ID) {
+        let url = match msg.content.to_lowercase() {
+            c if is_cringe(&c) && is_based(&c) => BOTH_URL,
+            c if is_based(&c) => BASED_URL,
+            c if is_cringe(&c) => CRINGE_URL,
+            _ => return None,
+        };
+        let mut last = LAST_SENT.lock().unwrap();
+        if last.elapsed() > COOLDOWN {
+            println!("Sending image at {:?}", Instant::now());
+            *last = Instant::now();
+            return Some(url);
+        }
+    }
+    None
+}
+
+pub fn main() {
+    let mut client = Client::new(
+        std::env::var("DISCORD_TOKEN").expect("no token in environment"),
+        Handler,
+    )
+    .expect("Could not create client");
+    client.start().expect("could not start");
+}