Break: read replay packets

src/models/data/packet.rs

@@ -0,0 +1,32 @@
+use std::io::Read;
+
+use byteorder::{LittleEndian, ReadBytesExt};
+use serde::Serialize;
+
+use crate::models::data::payload::Payload;
+use crate::result::Result;
+
+#[derive(Debug, Serialize)]
+pub struct Packet {
+    pub clock: f32,
+    pub payload: Payload,
+}
+
+impl Packet {
+    pub fn from_reader(reader: &mut impl Read) -> Result<Option<Self>> {
+        let Ok(length) = reader.read_u32::<LittleEndian>() else { return Ok(None) };
+        let type_ = reader.read_u32::<LittleEndian>()?;
+        let clock = reader.read_f32::<LittleEndian>()?;
+        let payload = Self::read_payload(reader, length as usize)?;
+        let payload = Payload::new(type_, payload)?;
+        let this = Self { clock, payload };
+        Ok(Some(this))
+    }
+
+    fn read_payload(reader: &mut impl Read, length: usize) -> Result<Vec<u8>> {
+        let mut buffer = Vec::new();
+        buffer.resize(length, 0);
+        reader.read_exact(&mut buffer)?;
+        Ok(buffer)
+    }
+}