wotbreplay-parser/src/models/battle_results_dat.rs

use std::io::Read;

use prost::Message;
use serde::Deserialize;
use serde_bytes::ByteBuf;

use crate::error::Error;
use crate::models::battle_results::BattleResults;
use crate::result::Result;

/// Un-pickled `battle_results.dat`.
///
/// # `battle_results.dat` structure
///
/// Entire file is a [pickled](https://docs.python.org/3/library/pickle.html) 2-tuple:
///
/// - Arena unique ID
/// - Battle results serialized with [Protocol Buffers](https://developers.google.com/protocol-buffers)
#[derive(Debug, Deserialize)]
#[serde(from = "(u64, ByteBuf)")]
pub struct BattleResultsDat {
    pub arena_unique_id: u64,

    /// Protobuf-serialized battle results.
    pub buffer: ByteBuf,
}

impl From<(u64, ByteBuf)> for BattleResultsDat {
    fn from((arena_unique_id, buffer): (u64, ByteBuf)) -> Self {
        Self { arena_unique_id, buffer }
    }
}

impl BattleResultsDat {
    /// Parse the pickled structure from the reader which contains `battle_results.dat`.
    ///
    /// It can be used either on the `battle_results.dat` for a replay archive,
    /// or directly on `**/DAVAProject/battle_results/*/*_full.dat`.
    pub fn from_reader(reader: impl Read) -> Result<Self> {
        Ok(serde_pickle::from_reader(reader, Default::default())?)
    }
}

impl TryInto<BattleResults> for BattleResultsDat {
    type Error = Error;

    /// Decode the battle results from the internal buffer.
    fn try_into(self) -> Result<BattleResults> {
        Ok(BattleResults::decode(self.buffer.as_ref())?)
    }
}