//! Internal representations of incoming events.

use irc::proto::{Command, Message};
use serde::{Deserialize, Serialize};

/// Represents an event.  Probably from IRC.
#[derive(Deserialize, Serialize)]
pub struct Event {
    /// Who is the message from?
    from: String,
    /// What is the message?
    message: String,
}

impl Event {
    /// Creates a new message.
    pub fn new(from: impl Into<String>, msg: impl Into<String>) -> Self {
        Self {
            from: from.into(),
            message: msg.into(),
        }
    }
}

impl TryFrom<&Message> for Event {
    type Error = &'static str;

    fn try_from(value: &Message) -> Result<Self, Self::Error> {
        let from = value.response_target().unwrap_or("unknown").to_string();
        match &value.command {
            Command::PRIVMSG(_channel, message) => Ok(Event {
                from,
                message: message.clone(),
            }),
            _ => Err("Not a PRIVMSG"),
        }
    }
}