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use IntoBytes;
use frame::*;
use frame::events::SimpleServerEvent;
use types::{CStringList, CString};

/// The structure which represents a body of a frame of type `options`.
pub struct BodyReqRegister {
    pub events: Vec<SimpleServerEvent>,
}

impl IntoBytes for BodyReqRegister {
    fn into_cbytes(&self) -> Vec<u8> {
        let events_string_list = CStringList {
            list: self.events
                .iter()
                .map(|event| CString::new(event.as_string()))
                .collect(),
        };
        events_string_list.into_cbytes()
    }
}

// Frame implementation related to BodyReqRegister

impl Frame {
    /// Creates new frame of type `REGISTER`.
    pub fn new_req_register(events: Vec<SimpleServerEvent>) -> Frame {
        let version = Version::Request;
        let flag = Flag::Ignore;
        // sync client
        let stream: u64 = 0;
        let opcode = Opcode::Register;
        let register_body = BodyReqRegister { events: events };

        Frame {
            version: version,
            flags: vec![flag],
            stream: stream,
            opcode: opcode,
            body: register_body.into_cbytes(),
            // for request frames it's always None
            tracing_id: None,
            warnings: vec![],
        }
    }
}