use anyhow::Result;
use clap::Clap;
use posixmq::PosixMq;

/// Print information about an existing message queue
#[derive(Clap, Debug)]
pub struct Info {
    /// Name of the queue
    #[clap(value_name = "QUEUE")]
    pub queue: String,
}

impl Info {
    pub fn run(&self) -> Result<()> {
        let attrs = PosixMq::open(&self.queue)?.attributes()?;

        println!(
            "Message queue: {}, msg_max: {}, msgsize_max: {}, current_messages: {}",
            &self.queue, &attrs.capacity, &attrs.max_msg_len, &attrs.current_messages
        );

        Ok(())
    }
}