Send correct data component checksums (#234)

* start implementing data component crc32 hashes

* start doing serde impls for checksums

* make more components hashable

* make all data components serializable

* support recursive components

* fix simdnbt dep

* update changelog

* clippy

2 files changed, 69 insertions, 1 deletions

diff --git a/azalea-registry/src/data.rs b/azalea-registry/src/data.rs
index a9f797b6..c1c1efe5 100644
--- a/azalea-registry/src/data.rs
+++ b/azalea-registry/src/data.rs
@@ -40,6 +40,17 @@ macro_rules! data_registry {
                 Self { id }
             }
         }
+
+        #[cfg(feature = "serde")]
+        impl serde::Serialize for $name {
+            fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+            where
+                S: serde::Serializer,
+            {
+                // see ChecksumSerializer::serialize_newtype_variant
+                serializer.serialize_newtype_variant(concat!("minecraft:", $registry_name), self.id, "", &())
+            }
+        }
     };
 }
 
diff --git a/azalea-registry/src/lib.rs b/azalea-registry/src/lib.rs
index 8ab12853..90f1ff55 100644
--- a/azalea-registry/src/lib.rs
+++ b/azalea-registry/src/lib.rs
@@ -18,6 +18,8 @@ use azalea_buf::{AzaleaRead, AzaleaReadVar, AzaleaWrite, AzaleaWriteVar, BufRead
 use azalea_registry_macros::registry;
 pub use data::*;
 pub use extra::*;
+#[cfg(feature = "serde")]
+use serde::Serialize;
 
 pub trait Registry: AzaleaRead + AzaleaWrite
 where
@@ -125,7 +127,7 @@ impl<D: Registry, ResourceLocation: AzaleaRead + AzaleaWrite> AzaleaWrite
                     item.azalea_write(buf)?;
                 }
             }
-            Self::Named { key, .. } => {
+            Self::Named { key, contents: _ } => {
                 0i32.azalea_write_var(buf)?;
                 key.azalea_write(buf)?;
             }
@@ -147,6 +149,42 @@ impl<D: Registry + Debug, ResourceLocation: AzaleaRead + AzaleaWrite + Debug> De
         }
     }
 }
+impl<D: Registry, ResourceLocation: AzaleaRead + AzaleaWrite> From<Vec<D>>
+    for HolderSet<D, ResourceLocation>
+{
+    fn from(contents: Vec<D>) -> Self {
+        Self::Direct { contents }
+    }
+}
+#[cfg(feature = "serde")]
+impl<D: Registry + Serialize, ResourceLocation: AzaleaRead + AzaleaWrite + Serialize> Serialize
+    for HolderSet<D, ResourceLocation>
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        match self {
+            Self::Direct { contents } => {
+                if contents.len() == 1 {
+                    contents[0].serialize(serializer)
+                } else {
+                    contents.serialize(serializer)
+                }
+            }
+            Self::Named { key, contents: _ } => key.serialize(serializer),
+        }
+    }
+}
+impl<D: Registry, ResourceLocation: AzaleaRead + AzaleaWrite> Default
+    for HolderSet<D, ResourceLocation>
+{
+    fn default() -> Self {
+        Self::Direct {
+            contents: Vec::new(),
+        }
+    }
+}
 
 /// A reference to either a registry or a custom value (usually something with a
 /// ResourceLocation).
@@ -206,6 +244,25 @@ impl<R: Registry + PartialEq, Direct: AzaleaRead + AzaleaWrite + PartialEq> Part
         }
     }
 }
+impl<R: Registry + Default, Direct: AzaleaRead + AzaleaWrite> Default for Holder<R, Direct> {
+    fn default() -> Self {
+        Self::Reference(R::default())
+    }
+}
+#[cfg(feature = "serde")]
+impl<R: Registry + Serialize, Direct: AzaleaRead + AzaleaWrite + Serialize> Serialize
+    for Holder<R, Direct>
+{
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        match self {
+            Self::Reference(value) => value.serialize(serializer),
+            Self::Direct(value) => value.serialize(serializer),
+        }
+    }
+}
 
 registry! {
 /// The AI code that's currently being executed for the entity.