tenebrous-dicebot/src/commands.rs

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Rust
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use crate::dice::ElementExpression;
use crate::roll::{Roll, Rolled};
use nom::error::ErrorKind;
use nom::IResult;
pub mod parser;
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pub struct Execution {
plain: String,
html: String,
}
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impl Execution {
pub fn plain(&self) -> &str {
&self.plain
}
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pub fn html(&self) -> &str {
&self.html
}
}
pub struct RollCommand(ElementExpression);
pub trait Command {
fn execute(&self) -> Execution;
}
impl Command for RollCommand {
fn execute(&self) -> Execution {
let roll = self.0.roll();
let plain = format!("Dice: {}\nResult: {}", self.0, roll);
let html = format!("<strong>Dice:</strong> {}<br><strong>Result</strong>: {}", self.0, roll);
Execution {
plain,
html,
}
}
}
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pub fn parse_command(s: &str) -> Option<Result<Box<dyn Command>, String>> {
// Ignore trailing input, if any.
match parser::parse_command(s) {
Ok((_, Some(command))) => Some(Ok(command)),
Ok((_, None)) => None,
Err(err) => Some(Err(err.to_string())),
}
}