Add World::find_block (#80)

* start adding World::find_block

* keep working on find_block

* BlockStates

* fix sorting

* update examples that use find_one_block

* azalea_block::properties

* fix tests

* add a gotoblock command to testbot

5 files changed, 147 insertions, 83 deletions

diff --git a/azalea-block/README.md b/azalea-block/README.md
index e4b6357b..9be4c79b 100755
--- a/azalea-block/README.md
+++ b/azalea-block/README.md
@@ -8,11 +8,11 @@ There's three block types, used for different things. You can (mostly) convert b
 
 ```
 # use azalea_block::BlockState;
-let block_state: BlockState = azalea_block::CobblestoneWallBlock {
-    east: azalea_block::EastWall::Low,
-    north: azalea_block::NorthWall::Low,
-    south: azalea_block::SouthWall::Low,
-    west: azalea_block::WestWall::Low,
+let block_state: BlockState = azalea_block::blocks::CobblestoneWall {
+    east: azalea_block::properties::EastWall::Low,
+    north: azalea_block::properties::NorthWall::Low,
+    south: azalea_block::properties::SouthWall::Low,
+    west: azalea_block::properties::WestWall::Low,
     up: false,
     waterlogged: false,
 }
@@ -36,7 +36,7 @@ let block = Box::<dyn Block>::from(block_state);
 ```
 # use azalea_block::{Block, BlockState};
 # let block_state: BlockState = azalea_registry::Block::Jukebox.into();
-if let Some(jukebox) = Box::<dyn Block>::from(block_state).downcast_ref::<azalea_block::JukeboxBlock>() {
+if let Some(jukebox) = Box::<dyn Block>::from(block_state).downcast_ref::<azalea_block::blocks::Jukebox>() {
     // ...
 }
 ```
diff --git a/azalea-block/azalea-block-macros/src/lib.rs b/azalea-block/azalea-block-macros/src/lib.rs
index b69ebd06..a8739e7c 100755
--- a/azalea-block/azalea-block-macros/src/lib.rs
+++ b/azalea-block/azalea-block-macros/src/lib.rs
@@ -38,7 +38,7 @@ struct PropertyDefinitions {
     properties: Vec<PropertyDefinition>,
 }
 
-/// `snowy: false` or `axis: Axis::Y`
+/// `snowy: false` or `axis: properties::Axis::Y`
 #[derive(Debug)]
 struct PropertyWithNameAndDefault {
     name: Ident,
@@ -59,7 +59,7 @@ struct BlockDefinition {
 }
 impl Parse for PropertyWithNameAndDefault {
     fn parse(input: ParseStream) -> Result<Self> {
-        // `snowy: false` or `axis: Axis::Y`
+        // `snowy: false` or `axis: properties::Axis::Y`
         let property_name = input.parse()?;
         input.parse::<Token![:]>()?;
 
@@ -74,7 +74,7 @@ impl Parse for PropertyWithNameAndDefault {
             is_enum = true;
             property_type = first_ident;
             let variant = input.parse::<Ident>()?;
-            property_default.extend(quote! { ::#variant });
+            property_default = quote! { properties::#property_default::#variant };
         } else if first_ident_string == "true" || first_ident_string == "false" {
             property_type = Ident::new("bool", first_ident.span());
         } else {
@@ -310,6 +310,7 @@ pub fn make_block_states(input: TokenStream) -> TokenStream {
     let mut from_state_to_block_match = quote! {};
     let mut from_registry_block_to_block_match = quote! {};
     let mut from_registry_block_to_blockstate_match = quote! {};
+    let mut from_registry_block_to_blockstates_match = quote! {};
 
     for block in &input.block_definitions.blocks {
         let block_property_names = &block
@@ -386,13 +387,16 @@ pub fn make_block_states(input: TokenStream) -> TokenStream {
         for PropertyWithNameAndDefault {
             property_type: struct_name,
             name,
+            is_enum,
             ..
         } in &properties_with_name
         {
             // let property_name_snake =
             //     Ident::new(&property.to_string(), proc_macro2::Span::call_site());
-            block_struct_fields.extend(quote! {
-                pub #name: #struct_name,
+            block_struct_fields.extend(if *is_enum {
+                quote! { pub #name: properties::#struct_name, }
+            } else {
+                quote! { pub #name: #struct_name, }
             });
         }
 
@@ -400,10 +404,7 @@ pub fn make_block_states(input: TokenStream) -> TokenStream {
             &to_pascal_case(&block.name.to_string()),
             proc_macro2::Span::call_site(),
         );
-        let block_struct_name = Ident::new(
-            &format!("{block_name_pascal_case}Block"),
-            proc_macro2::Span::call_site(),
-        );
+        let block_struct_name = Ident::new(&block_name_pascal_case.to_string(), proc_macro2::Span::call_site());
 
         let mut from_block_to_state_match_inner = quote! {};
 
@@ -445,7 +446,7 @@ pub fn make_block_states(input: TokenStream) -> TokenStream {
                 }
 
                 let property_type = if property.is_enum {
-                    quote! {#property_struct_name_ident::#variant}
+                    quote! {properties::#property_struct_name_ident::#variant}
                 } else {
                     quote! {#variant}
                 };
@@ -476,9 +477,9 @@ pub fn make_block_states(input: TokenStream) -> TokenStream {
         // 7035..=7058 => {
         //     let b = b - 7035;
         //     &AcaciaButtonBlock {
-        //         powered: Powered::from((b / 1) % 2),
-        //         facing: Facing::from((b / 2) % 4),
-        //         face: Face::from((b / 8) % 3),
+        //         powered: properties::Powered::from((b / 1) % 2),
+        //         facing: properties::Facing::from((b / 2) % 4),
+        //         face: properties::Face::from((b / 8) % 3),
         //     }
         // }
         let mut from_state_to_block_inner = quote! {};
@@ -498,7 +499,7 @@ pub fn make_block_states(input: TokenStream) -> TokenStream {
                     // this is not a mistake, it starts with true for some reason
                     quote! {(b / #division) % #property_variants_count == 0}
                 } else {
-                    quote! {#property_struct_name_ident::from((b / #division) % #property_variants_count)}
+                    quote! {properties::#property_struct_name_ident::from((b / #division) % #property_variants_count)}
                 }
             };
             from_state_to_block_inner.extend(quote! {
@@ -523,6 +524,9 @@ pub fn make_block_states(input: TokenStream) -> TokenStream {
         from_registry_block_to_blockstate_match.extend(quote! {
             azalea_registry::Block::#block_name_pascal_case => BlockState { id: #default_state_id },
         });
+        from_registry_block_to_blockstates_match.extend(quote! {
+            azalea_registry::Block::#block_name_pascal_case => BlockStates::from(#first_state_id..=#last_state_id),
+        });
 
         let mut block_default_fields = quote! {};
         for PropertyWithNameAndDefault {
@@ -560,14 +564,14 @@ pub fn make_block_states(input: TokenStream) -> TokenStream {
                 fn id(&self) -> &'static str {
                     #block_id
                 }
-                fn as_blockstate(&self) -> BlockState {
+                fn as_block_state(&self) -> BlockState {
                     #from_block_to_state_match
                 }
             }
 
             impl From<#block_struct_name> for BlockState {
                 fn from(b: #block_struct_name) -> Self {
-                    b.as_blockstate()
+                    b.as_block_state()
                 }
             }
 
@@ -585,21 +589,7 @@ pub fn make_block_states(input: TokenStream) -> TokenStream {
 
     let last_state_id = state_id - 1;
     let mut generated = quote! {
-        #property_enums
-
-        /// A representation of a state a block can be in. (for example, a stone
-        /// block only has one state but each possible stair rotation is a
-        /// different state).
-        #[derive(Copy, Clone, PartialEq, Eq, Default)]
-        pub struct BlockState {
-            /// The protocol ID for the block state. IDs may change every
-            /// version, so you shouldn't hard-code them or store them in databases.
-            pub id: u32
-        }
-
         impl BlockState {
-            pub const AIR: BlockState = BlockState { id: 0 };
-
             /// Returns the highest possible state ID.
             #[inline]
             pub fn max_state() -> u32 {
@@ -607,38 +597,50 @@ pub fn make_block_states(input: TokenStream) -> TokenStream {
             }
         }
 
-        impl std::fmt::Debug for BlockState {
-            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-                write!(f, "BlockState(id: {}, {:?})", self.id, Box::<dyn Block>::from(*self))
-            }
+        pub mod properties {
+            use super::*;
+
+            #property_enums
         }
     };
 
     generated.extend(quote! {
-        #block_structs
-
-        impl From<BlockState> for Box<dyn Block> {
-            fn from(block_state: BlockState) -> Self {
-                let b = block_state.id;
-                match b {
-                    #from_state_to_block_match
-                    _ => panic!("Invalid block state: {}", b),
+        pub mod blocks {
+            use super::*;
+
+            #block_structs
+
+            impl From<BlockState> for Box<dyn Block> {
+                fn from(block_state: BlockState) -> Self {
+                    let b = block_state.id;
+                    match b {
+                        #from_state_to_block_match
+                        _ => panic!("Invalid block state: {}", b),
+                    }
                 }
             }
-        }
-        impl From<azalea_registry::Block> for Box<dyn Block> {
-            fn from(block: azalea_registry::Block) -> Self {
-                match block {
-                    #from_registry_block_to_block_match
-                    _ => unreachable!("There should always be a block struct for every azalea_registry::Block variant")
+            impl From<azalea_registry::Block> for Box<dyn Block> {
+                fn from(block: azalea_registry::Block) -> Self {
+                    match block {
+                        #from_registry_block_to_block_match
+                        _ => unreachable!("There should always be a block struct for every azalea_registry::Block variant")
+                    }
                 }
             }
-        }
-        impl From<azalea_registry::Block> for BlockState {
-            fn from(block: azalea_registry::Block) -> Self {
-                match block {
-                    #from_registry_block_to_blockstate_match
-                    _ => unreachable!("There should always be a block state for every azalea_registry::Block variant")
+            impl From<azalea_registry::Block> for BlockState {
+                fn from(block: azalea_registry::Block) -> Self {
+                    match block {
+                        #from_registry_block_to_blockstate_match
+                        _ => unreachable!("There should always be a block state for every azalea_registry::Block variant")
+                    }
+                }
+            }
+            impl From<azalea_registry::Block> for BlockStates {
+                fn from(block: azalea_registry::Block) -> Self {
+                    match block {
+                        #from_registry_block_to_blockstates_match
+                        _ => unreachable!("There should always be a block state for every azalea_registry::Block variant")
+                    }
                 }
             }
         }
diff --git a/azalea-block/src/blocks.rs b/azalea-block/src/generated.rs
index e6923d59..afe6dfda 100755
--- a/azalea-block/src/blocks.rs
+++ b/azalea-block/src/generated.rs
@@ -1,20 +1,7 @@
-use std::any::Any;
-
-use crate::BlockBehavior;
+use crate::{Block, BlockBehavior, BlockState, BlockStates};
 use azalea_block_macros::make_block_states;
 use std::fmt::Debug;
 
-pub trait Block: Debug + Any {
-    fn behavior(&self) -> BlockBehavior;
-    fn id(&self) -> &'static str;
-    fn as_blockstate(&self) -> BlockState;
-}
-impl dyn Block {
-    pub fn downcast_ref<T: Block>(&self) -> Option<&T> {
-        (self as &dyn Any).downcast_ref::<T>()
-    }
-}
-
 make_block_states! {
     Properties => {
         "snowy" => bool,
diff --git a/azalea-block/src/lib.rs b/azalea-block/src/lib.rs
index 7a62e588..43099db5 100755
--- a/azalea-block/src/lib.rs
+++ b/azalea-block/src/lib.rs
@@ -2,14 +2,49 @@
 #![feature(trait_upcasting)]
 
 mod behavior;
-mod blocks;
+mod generated;
+mod range;
+
+pub use generated::{blocks, properties};
 
 use azalea_buf::{BufReadError, McBufReadable, McBufVarReadable, McBufVarWritable, McBufWritable};
 pub use behavior::BlockBehavior;
-pub use blocks::*;
-use std::io::{Cursor, Write};
+use core::fmt::Debug;
+pub use range::BlockStates;
+use std::{
+    any::Any,
+    io::{Cursor, Write},
+};
+
+pub trait Block: Debug + Any {
+    fn behavior(&self) -> BlockBehavior;
+    /// Get the Minecraft ID for this block. For example `stone` or
+    /// `grass_block`.
+    fn id(&self) -> &'static str;
+    /// Convert the block to a block state. This is lossless, as the block
+    /// contains all the state data.
+    fn as_block_state(&self) -> BlockState;
+}
+impl dyn Block {
+    pub fn downcast_ref<T: Block>(&self) -> Option<&T> {
+        (self as &dyn Any).downcast_ref::<T>()
+    }
+}
+
+/// A representation of a state a block can be in.
+///
+/// For example, a stone block only has one state but each possible stair
+/// rotation is a different state.
+#[derive(Copy, Clone, PartialEq, Eq, Default, Hash)]
+pub struct BlockState {
+    /// The protocol ID for the block state. IDs may change every
+    /// version, so you shouldn't hard-code them or store them in databases.
+    pub id: u32,
+}
 
 impl BlockState {
+    pub const AIR: BlockState = BlockState { id: 0 };
+
     /// Transmutes a u32 to a block state.
     ///
     /// # Safety
@@ -52,6 +87,17 @@ impl McBufWritable for BlockState {
     }
 }
 
+impl std::fmt::Debug for BlockState {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "BlockState(id: {}, {:?})",
+            self.id,
+            Box::<dyn Block>::from(*self)
+        )
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -80,18 +126,14 @@ mod tests {
             "{:?}",
             BlockState::from(azalea_registry::Block::FloweringAzalea)
         );
-        assert!(
-            formatted.ends_with(", FloweringAzaleaBlock)"),
-            "{}",
-            formatted
-        );
+        assert!(formatted.ends_with(", FloweringAzalea)"), "{}", formatted);
 
         let formatted = format!(
             "{:?}",
             BlockState::from(azalea_registry::Block::BigDripleafStem)
         );
         assert!(
-            formatted.ends_with(", BigDripleafStemBlock { facing: North, waterlogged: false })"),
+            formatted.ends_with(", BigDripleafStem { facing: North, waterlogged: false })"),
             "{}",
             formatted
         );
diff --git a/azalea-block/src/range.rs b/azalea-block/src/range.rs
new file mode 100644
index 00000000..6ccf4152
--- /dev/null
+++ b/azalea-block/src/range.rs
@@ -0,0 +1,33 @@
+use std::{collections::HashSet, ops::RangeInclusive};
+
+use crate::BlockState;
+
+#[derive(Debug, Clone)]
+pub struct BlockStates {
+    pub set: HashSet<BlockState>,
+}
+
+impl From<RangeInclusive<u32>> for BlockStates {
+    fn from(range: RangeInclusive<u32>) -> Self {
+        let mut set = HashSet::with_capacity((range.end() - range.start() + 1) as usize);
+        for id in range {
+            set.insert(BlockState { id });
+        }
+        Self { set }
+    }
+}
+
+impl IntoIterator for BlockStates {
+    type Item = BlockState;
+    type IntoIter = std::collections::hash_set::IntoIter<BlockState>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.set.into_iter()
+    }
+}
+
+impl BlockStates {
+    pub fn contains(&self, state: &BlockState) -> bool {
+        self.set.contains(state)
+    }
+}