initial?

.gitignore

@@ -0,0 +1 @@
+/target

Cargo.toml

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+[package]
+name = "namebot"
+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"
+time = "0.2.10"

src/main.rs

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+use serenity::client::Client;
+use serenity::framework::standard::{
+    macros::{command, group},
+    CommandResult, StandardFramework,
+};
+use serenity::model::{
+    channel::Message,
+    id::{ChannelId, GuildId},
+    prelude::User,
+};
+use serenity::prelude::*;
+use std::fs::File;
+use std::io::{self, BufRead, BufReader};
+use time::Duration;
+
+#[group]
+#[commands(name)]
+struct Fluff;
+struct Handler;
+impl EventHandler for Handler {
+    fn guild_ban_addition(&self, ctx: Context, guild_id: GuildId, _: User) {
+        if guild_id == 427456811973738498 {
+            if let Err(e) =
+                ChannelId(562731470423064587).say(&ctx, "Das hier ist eine flauschige Diktatur!")
+            {
+                eprintln!("Couldn’t send message because {:?}", e);
+            }
+        }
+    }
+}
+
+fn read_token() -> io::Result<String> {
+    let reader = BufReader::new(File::open("secret")?);
+    reader.lines().next().unwrap()
+}
+
+fn main() {
+    let mut client = Client::new(&read_token().expect("no secret file"), Handler)
+        .expect("Error creating client");
+    client.with_framework(
+        StandardFramework::new()
+            .configure(|c| c.prefix("!"))
+            .group(&FLUFF_GROUP),
+    );
+
+    if let Err(why) = client.start() {
+        println!("An error occurred while running the client: {:?}", why);
+    }
+}
+
+#[command]
+fn name(ctx: &mut Context, msg: &Message) -> CommandResult {
+    if let Some((_, name)) = msg.content.split_once(' ') {
+        let (name, adjustment) = name.split_once(" -").unwrap_or((name, "0"));
+        let adjustment = adjustment.strip_suffix("h").unwrap_or(adjustment);
+        msg.guild(&ctx)
+            .unwrap()
+            .read()
+            .edit_member(&ctx, msg.author.id, |m| m.nickname(name))?;
+        let now = time::OffsetDateTime::now_utc()
+            - adjustment
+                .parse::<f32>()
+                .map(|a| (a * 3600.0) as i64)
+                .map(Duration::seconds)
+                .ok()
+                .unwrap_or_else(Duration::zero);
+        println!(
+            "{},{},{},{},{}",
+            now.format("%d.%m.%Y %H:%M"),
+            name,
+            now.format("%y%m"),
+            msg.author.id,
+            now.unix_timestamp()
+        );
+    } else {
+        msg.reply(&ctx, "Please specify a new name.")?;
+    }
+    Ok(())
+}