From 57cf820ac08a68d9866a72166980ccaee8d55e0f Mon Sep 17 00:00:00 2001
From: Adam Gausmann <adam@gaussian.dev>
Date: Fri, 28 Oct 2022 22:54:14 -0500
Subject: [PATCH] Add data parser for circuit boards

---
 src/custom_data.rs | 48 ++++++++++++++++++++++++++++++++++++++++++++++
 src/lib.rs         |  1 +
 2 files changed, 49 insertions(+)
 create mode 100644 src/custom_data.rs

diff --git a/src/custom_data.rs b/src/custom_data.rs
new file mode 100644
index 0000000..87b2162
--- /dev/null
+++ b/src/custom_data.rs
@@ -0,0 +1,48 @@
+//! Parsers and serializers for vanilla component data.
+//!
+//! These are designed for Logic World 0.91.0 Preview 510 and may not work for
+//! other game versions.
+
+use std::io::{Read, Write};
+
+use crate::error::Error;
+use crate::io::*;
+
+pub trait ComponentData: Sized {
+    const TYPE_STRING: &'static str;
+
+    fn read<R: Read>(reader: &mut R) -> Result<Self, Error>;
+
+    fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error>;
+}
+
+#[derive(Debug)]
+pub struct CircuitBoard {
+    pub color: [u8; 3],
+    pub size_x: u32,
+    pub size_z: u32,
+}
+
+impl ComponentData for CircuitBoard {
+    const TYPE_STRING: &'static str = "MHG.CircuitBoard";
+
+    fn read<R: Read>(reader: &mut R) -> Result<Self, Error> {
+        let color = read_array(|| read_u8(reader))?;
+        let size_x = read_u32(reader)?;
+        let size_z = read_u32(reader)?;
+        Ok(Self {
+            color,
+            size_x,
+            size_z,
+        })
+    }
+
+    fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error> {
+        for x in self.color {
+            write_u8(x, writer)?;
+        }
+        write_u32(self.size_x, writer)?;
+        write_u32(self.size_z, writer)?;
+        Ok(())
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index 17c88c5..07e8371 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,5 @@
 mod convert;
+pub mod custom_data;
 pub mod error;
 pub(crate) mod io;
 pub mod v5;