opt-commands: add uwurandom (#112)

* opt-commands: add uwurandom

* Apply suggestions from code review

Co-authored-by: seth <[email protected]>

* opt-commands: set random default value for uwurandom

---------

Co-authored-by: seth <[email protected]>

1 files changed, 41 insertions, 0 deletions

diff --git a/src/commands/optional/uwurandom.rs b/src/commands/optional/uwurandom.rs
new file mode 100644
index 0000000..c8405a0
--- /dev/null
+++ b/src/commands/optional/uwurandom.rs
@@ -0,0 +1,41 @@
+use crate::Context;
+
+use color_eyre::eyre::Result;
+use log::debug;
+use rand::Rng;
+
+/// Generate some amount of uwurandom
+#[poise::command(slash_command)]
+pub async fn uwurandom(
+	ctx: Context<'_>,
+	#[description = "The amount of uwurandom to generate"]
+	#[min = 1]
+	#[max = 2000]
+	length: Option<u16>,
+) -> Result<()> {
+	let gid = ctx.guild_id().unwrap_or_default();
+	let settings = ctx.data().storage.get_guild_settings(&gid).await?;
+
+	if !settings.optional_commands_enabled {
+		debug!("Not running uwurandom in {gid} since it's disabled");
+		ctx.say("I'm not allowed to do that here").await?;
+		return Ok(());
+	}
+
+	let length = length.unwrap_or(rand::thread_rng().gen_range(1..50));
+
+	let mut result = String::with_capacity(length as usize);
+	// ThreadRng is not Send(obviously), and rustc is slightly too paranoid about rng spilling to await point
+	// So calm it by constraining it to a block
+	{
+		let mut rng = rand::thread_rng();
+		let mut state_machine = uwurandom_rs::StateMachine::new(&mut rng);
+		for _ in 0..length {
+			let generated;
+			(state_machine, generated) = state_machine.generate(&mut rng);
+			result.push(generated);
+		}
+	}
+	ctx.say(result).await?;
+	Ok(())
+}