use crate::io::BufMut;

use crate::postgres::protocol::{StatementId, Write};

use byteorder::{ByteOrder, NetworkEndian};

pub struct Parse<'a> {

pub statement: StatementId,

pub query: &'a str,

pub param_types: &'a [u32],

}

impl Write for Parse<'_> {

fn write(&self, buf: &mut Vec<u8>) {

buf.push(b'P');

let pos = buf.len();

buf.put_i32::<NetworkEndian>(0); // skip over len

self.statement.write(buf);

buf.put_str_nul(self.query);

buf.put_i16::<NetworkEndian>(self.param_types.len() as i16);

for &type_ in self.param_types {

buf.put_u32::<NetworkEndian>(type_);

}

// Write-back the len to the beginning of this frame

let len = buf.len() - pos;

NetworkEndian::write_i32(&mut buf[pos..], len as i32);

}

}