25 lines
744 B
Rust
25 lines
744 B
Rust
use std::collections::HashMap;
|
|
use async_trait::async_trait;
|
|
use meval::Context;
|
|
use crate::bot::{Command, Message};
|
|
|
|
#[derive(Default)]
|
|
pub struct Eval {
|
|
last_eval: HashMap<String, f64>
|
|
}
|
|
|
|
#[async_trait]
|
|
impl Command for Eval {
|
|
async fn execute(&mut self, msg: Message<'_>) -> anyhow::Result<String> {
|
|
if let Some(expr) = msg.content {
|
|
let last_eval = self.last_eval.entry(msg.author.into()).or_insert(0.0);
|
|
let mut meval_ctx = Context::new();
|
|
let value = meval::eval_str_with_context(expr, meval_ctx.var("x", *last_eval))?;
|
|
*last_eval = value;
|
|
Ok(format!("{} = {}", expr, value))
|
|
} else {
|
|
Ok("No expression to evaluate".into())
|
|
}
|
|
}
|
|
}
|