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// /!\ This file is not used in the project /!\
// First Idea to implément the compression system onto the packet system
// After some internal debate I decided to not implement encryption and compression onto the packet system
// use super::{CompressionState, Packet, PacketError, PacketResult};
// use crate::{
// protocol::types::{VarInt, WriteToBytes},
// ProtocolWrite,
// };
// use bytes::BytesMut;
// use log::{debug, error};
// use std::io::{Read, Write};
// /// Trait pour la compression/décompression des paquets
// pub trait PacketCompression {
// /// Compresse les données du paquet si nécessaire
// fn compress(&self) -> PacketResult<BytesMut>;
// /// Décompresse les données du paquet
// fn decompress(&self) -> PacketResult<BytesMut>;
// /// Détermine si les données doivent être compressées
// fn should_compress(&self) -> bool;
// }
// impl PacketCompression for Packet {
// fn compress(&self) -> PacketResult<BytesMut> {
// match self.compression {
// CompressionState::Disabled => {
// debug!("Compression disabled, returning raw data");
// Ok(self.data.clone())
// }
// CompressionState::Enabled { threshold } => {
// // Prepare full packet data
// let mut uncompressed_packet = Vec::new();
// VarInt(self.id)
// .write_to(&mut uncompressed_packet)
// .map_err(PacketError::Io)?;
// uncompressed_packet.extend_from_slice(&self.data);
// let uncompressed_size = uncompressed_packet.len();
// debug!(
// "Preparing compression: size={}, threshold={}, packet_id=0x{:x}",
// uncompressed_size, threshold, self.id
// );
// if uncompressed_size > MAX_UNCOMPRESSED_SIZE {
// return Err(PacketError::compression("Packet too large"));
// }
// let mut output = BytesMut::new();
// if uncompressed_size < threshold as usize {
// // Send uncompressed with Data Length = 0
// debug!("Below threshold, sending uncompressed");
// VarInt(0).write_to_bytes(&mut output)?;
// output.extend_from_slice(&uncompressed_packet);
// } else {
// debug!("Above threshold, compressing data");
// let mut encoder = ZlibEncoder::new(Vec::new(), Compression::default());
// encoder.write_all(&uncompressed_packet)?;
// let compressed = encoder.finish()?;
// VarInt(uncompressed_size as i32).write_to_bytes(&mut output)?;
// // Write compressed payload
// output.extend_from_slice(&compressed);
// debug!(
// "Compressed: original={}, compressed={}, ratio={:.2}",
// uncompressed_size,
// compressed.len(),
// compressed.len() as f32 / uncompressed_size as f32
// );
// }
// Ok(output)
// }
// }
// }
// fn decompress(&self) -> PacketResult<BytesMut> {
// match self.compression {
// CompressionState::Disabled => Ok(self.data.clone()),
// CompressionState::Enabled { threshold } => {
// // Read Data Length
// let mut uncompressed_packet = Vec::new();
// VarInt(self.id)
// .write_to(&mut uncompressed_packet)
// .map_err(PacketError::Io)?;
// uncompressed_packet.extend_from_slice(&self.data);
// let uncompressed_size = uncompressed_packet.len();
// debug!(
// "Decompressing packet: declared length: {}, threshold: {}",
// uncompressed_size, threshold
// );
// if uncompressed_size == 0 || uncompressed_size < threshold as usize {
// // Uncompressed packet - return raw data after Data Length
// let data = &self.data;
// let mut output = BytesMut::with_capacity(data.len());
// output.extend_from_slice(data);
// debug!("Uncompressed packet: size={}", data.len());
// return Ok(output);
// }
// // Verify size requirements for compressed packets
// if uncompressed_size as usize > MAX_UNCOMPRESSED_SIZE {
// return Err(PacketError::compression("Invalid declared length"));
// }
// if uncompressed_size < threshold as usize {
// return Err(PacketError::compression(
// "Compressed packet smaller than threshold",
// ));
// }
// // Decompress
// let compressed = &self.data;
// debug!("Compressed data size: {}", compressed.len());
// let mut decoder = ZlibDecoder::new(std::io::Cursor::new(&compressed[..]));
// let mut decompressed = Vec::with_capacity(uncompressed_size);
// if let Err(e) = decoder.read_to_end(&mut decompressed) {
// error!("Decompression error: {}", e);
// return Err(PacketError::compression(format!(
// "Decompression failed: {}",
// e
// )));
// }
// // Verify decompressed length
// if decompressed.len() != uncompressed_size {
// error!(
// "Length mismatch: expected={}, got={}",
// uncompressed_size,
// decompressed.len()
// );
// return Err(PacketError::compression("Length mismatch"));
// }
// let mut output = BytesMut::with_capacity(decompressed.len());
// output.extend_from_slice(&decompressed);
// Ok(output)
// }
// }
// }
// fn should_compress(&self) -> bool {
// match self.compression {
// CompressionState::Disabled => false,
// CompressionState::Enabled { threshold } => {
// threshold >= 0 && self.data.len() >= threshold as usize
// }
// }
// }
// }
// #[cfg(test)]
// mod tests {
// use crate::ProtocolRead;
// use super::*;
// #[test]
// fn test_compression_disabled() {
// let mut packet = Packet::new(0x00);
// packet.data.extend_from_slice(b"test data");
// let compressed = packet.compress().unwrap();
// assert_eq!(&compressed[..], b"test data");
// let decompressed = packet.decompress().unwrap();
// assert_eq!(&decompressed[..], b"test data");
// }
// #[test]
// fn test_compression_above_threshold() {
// let mut packet = Packet::new(0x00);
// packet.enable_compression(256);
// // Créer des données qui dépassent le seuil
// let data = vec![1u8; 1000];
// packet.data = BytesMut::from(&data[..]);
// let compressed = packet.compress().unwrap();
// let mut compressed_packet = packet.clone();
// compressed_packet.data = compressed;
// let decompressed = compressed_packet.decompress().unwrap();
// // Vérifier que l'ID du paquet et les données sont préservés
// let mut cursor = std::io::Cursor::new(&decompressed[..]);
// let (VarInt(id), _) = VarInt::read_from(&mut cursor).unwrap();
// assert_eq!(id, packet.id);
// let remaining_data = &decompressed[cursor.position() as usize..];
// assert_eq!(remaining_data, &data[..]);
// }
// #[test]
// fn test_compression_below_threshold() {
// let mut packet = Packet::new(0x00);
// packet.enable_compression(256);
// let data = vec![1u8; 100]; // En dessous du seuil
// packet.data = BytesMut::from(&data[..]);
// let compressed = packet.compress().unwrap();
// assert_eq!(compressed[0], 0); // VarInt(0) indiquant pas de compression
// let mut compressed_packet = packet.clone();
// compressed_packet.data = compressed;
// let decompressed = compressed_packet.decompress().unwrap();
// assert_eq!(&decompressed[..], &packet.data[..]);
// }
// #[test]
// #[ignore]
// // TODO: fix test
// fn test_invalid_compressed_length() {
// let mut packet_to_compress = Packet::new(0x00);
// packet_to_compress.enable_compression(0);
// let mut data = Vec::new();
// // 8388609 = 0x800001 = 0b100000000000000000001
// // Proper 3-byte VarInt encoding:
// data.push(0x81); // 0b10000001: LSB 1 + continuation
// data.push(0x86); // 0b10000000: middle byte 0 + continuation
// data.push(0x40); // 0b01000000: MSB 1, no continuation
// packet_to_compress.data = BytesMut::from(&data[..]);
// let compressed_packet = packet_to_compress.compress();
// let data = compressed_packet.unwrap();
// let mut packet_to_decompress = Packet::new(0x00);
// packet_to_decompress.enable_compression(0);
// packet_to_decompress.data = BytesMut::from(&data[..]);
// let result = packet_to_decompress.decompress();
// println!("Result: {:?}", result);
// assert!(result.is_err());
// }
// #[test]
// fn test_max_uncompressed_size() {
// let mut packet = Packet::new(0x00);
// packet.enable_compression(0);
// // Test avec une taille exactement égale à la limite
// let mut temp = Vec::new();
// VarInt(MAX_UNCOMPRESSED_SIZE as i32)
// .write_to(&mut temp)
// .expect_err("Should fail");
// // Vérifier que l'erreur est bien due à la taille du VarInt
// packet.data = BytesMut::from(&temp[..]);
// assert!(packet.decompress().is_err());
// }
// }