empidee/src/commands/queue/add.rs

use serde::{Deserialize, Serialize};

use crate::{
    commands::{Command, Request, RequestParserError, RequestParserResult, ResponseParserError},
    common::{SongPosition, Uri},
    request_tokenizer::RequestTokenizer,
    response_tokenizer::ResponseAttributes,
};

pub struct Add;

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub struct AddRequest {
    uri: Uri,
    position: Option<SongPosition>,
}

impl AddRequest {
    pub fn new(uri: Uri, position: Option<SongPosition>) -> Self {
        Self { uri, position }
    }
}

impl Command for Add {
    type Request = AddRequest;
    type Response = ();
    const COMMAND: &'static str = "add";

    fn serialize_request(&self, request: Self::Request) -> String {
        match request.position {
            Some(position) => format!("{} {} {}", Self::COMMAND, request.uri, position),
            None => format!("{} {}", Self::COMMAND, request.uri),
        }
    }

    fn parse_request(mut parts: RequestTokenizer<'_>) -> RequestParserResult<'_> {
        let uri = match parts.next() {
            Some(s) => s,
            None => return Err(RequestParserError::UnexpectedEOF),
        };

        let position = match parts.next() {
            Some(s) => Some(
                s.parse::<SongPosition>()
                    .map_err(|_| RequestParserError::SyntaxError(1, s.to_owned()))?,
            ),
            None => None,
        };

        debug_assert!(parts.next().is_none());

        Ok((Request::Add(uri.to_string(), position), ""))
    }

    fn parse_response(
        parts: ResponseAttributes<'_>,
    ) -> Result<Self::Response, ResponseParserError<'_>> {
        debug_assert!(parts.is_empty());
        Ok(())
    }
}