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// Copyright (C) 2021-2021 The Whirlsplash Collective
// SPDX-License-Identifier: GPL-3.0-only
use {
crate::cmd::{
constants::Command,
extendable::{Creatable, ParsableWithArguments},
},
bytes::{BufMut, BytesMut},
std::str::from_utf8,
};
pub struct Text {
pub sender: String,
pub content: String,
}
impl Creatable for Text {
fn create(&self) -> Vec<u8> {
let mut command = BytesMut::new();
// Header
command.put_u8(0x01);
#[allow(clippy::cast_possible_truncation)]
command.put_i8(Command::Text as i32 as i8);
// Content
// TODO: Find a way to parse ObjIds.
//
// The below byte is suspected to be the sender's short ObjId.
command.put_i8(0x00);
command.put_u8(self.sender.len() as u8);
command.put_slice(self.sender.as_bytes());
command.put_u8(self.content.len() as u8);
command.put_slice(self.content.as_bytes());
// Convert to vector and insert the length
let mut command_as_vec = command.to_vec();
command_as_vec.insert(0, command.len() as u8 + 1);
// Return bytes
command_as_vec
}
}
impl ParsableWithArguments for Text {
/// The first and only element of `args` *should* be the username of the
/// sender.
///
/// There isn't anything currently stopping someone from passing some other
/// value so that might be annoying at times.
///
/// Realistically, this method is mostly static so the username will *always*
/// be passed properly unless someone intentionally commits breaking changes
/// on purpose regarding what is passed to to this method where called.
///
/// It would be neat to have some sort of ability to statically check if the
/// `args` argument contains x number of elements at compile time or
/// something of the sort but the Rust RFC is probably not focused on that.
///
/// So, right now, trust is in the developers' hands to make sure to pass the
/// right — number — of elements to `args`.
fn parse(data: Vec<u8>, args: &[&str]) -> Self {
Self {
sender: args[0].to_string(),
content: from_utf8(&data[6..]).unwrap().to_string(),
}
}
}
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