refactor: fix name err & add counter state fast snapshot

.vscode/settings.json

@@ -44,7 +44,8 @@
     "DEBUG": "*"
   },
   "rust-analyzer.cargo.features": [
-    "test_utils"
+    "test_utils",
+    "counter"
   ],
   "editor.defaultFormatter": "rust-lang.rust-analyzer",
   "rust-analyzer.server.extraEnv": {

crates/loro-internal/src/state.rs

@@ -90,7 +90,7 @@ pub(crate) struct ContainerCreationContext<'a> {
     peer: PeerID,
 }
 
-pub(crate) trait FastStateSnashot {
+pub(crate) trait FastStateSnapshot {
     fn encode_snapshot_fast<W: Write>(&mut self, w: W);
     fn decode_value(bytes: &[u8]) -> LoroResult<(LoroValue, &[u8])>;
     fn decode_snapshot_fast(

crates/loro-internal/src/state/counter_state.rs

@@ -125,3 +125,36 @@ impl ContainerState for CounterState {
         false
     }
 }
+
+mod snapshot {
+    use crate::state::FastStateSnapshot;
+
+    use super::*;
+
+    impl FastStateSnapshot for CounterState {
+        fn encode_snapshot_fast<W: std::io::Write>(&mut self, mut w: W) {
+            let bytes = self.value.to_le_bytes();
+            w.write_all(&bytes).unwrap();
+        }
+
+        fn decode_value(bytes: &[u8]) -> LoroResult<(LoroValue, &[u8])> {
+            Ok((
+                LoroValue::Double(f64::from_le_bytes(bytes.try_into().unwrap())),
+                &[],
+            ))
+        }
+
+        fn decode_snapshot_fast(
+            idx: ContainerIdx,
+            v: (LoroValue, &[u8]),
+            ctx: crate::state::ContainerCreationContext,
+        ) -> LoroResult<Self>
+        where
+            Self: Sized,
+        {
+            let mut counter = CounterState::new(idx);
+            counter.value = *v.0.as_double().unwrap();
+            Ok(counter)
+        }
+    }
+}

crates/loro-internal/src/state/list_state.rs

@@ -4,7 +4,7 @@ use std::{
     sync::{Arc, Mutex, Weak},
 };
 
-use super::{ContainerState, FastStateSnashot};
+use super::{ContainerState, FastStateSnapshot};
 use crate::{
     arena::SharedArena,
     container::{idx::ContainerIdx, list::list_op::ListOp, ContainerID},
@@ -552,7 +552,7 @@ mod snapshot {
 
     use super::*;
 
-    impl FastStateSnashot for ListState {
+    impl FastStateSnapshot for ListState {
         fn encode_snapshot_fast<W: Write>(&mut self, mut w: W) {
             let value = self.get_value();
             postcard::to_io(&value, &mut w).unwrap();

crates/loro-internal/src/state/map_state.rs

@@ -245,12 +245,12 @@ mod snapshot {
 
     use crate::{
         delta::MapValue,
-        state::{ContainerCreationContext, ContainerState, FastStateSnashot},
+        state::{ContainerCreationContext, ContainerState, FastStateSnapshot},
     };
 
     use super::MapState;
 
-    impl FastStateSnashot for MapState {
+    impl FastStateSnapshot for MapState {
         fn encode_snapshot_fast<W: std::io::prelude::Write>(&mut self, mut w: W) {
             let value = self.get_value();
             postcard::to_io(&value, &mut w).unwrap();

crates/loro-internal/src/state/movable_list_state.rs

@@ -1524,7 +1524,7 @@ mod snapshot {
 
     use crate::{
         encoding::value_register::ValueRegister,
-        state::{ContainerCreationContext, ContainerState, FastStateSnashot},
+        state::{ContainerCreationContext, ContainerState, FastStateSnapshot},
     };
 
     use super::{
@@ -1532,7 +1532,7 @@ mod snapshot {
         EncodedItemForFastSnapshot, MovableListState,
     };
 
-    impl FastStateSnashot for MovableListState {
+    impl FastStateSnapshot for MovableListState {
         fn encode_snapshot_fast<W: std::io::prelude::Write>(&mut self, mut w: W) {
             let value = self.get_value();
             postcard::to_io(&value, &mut w).unwrap();

crates/loro-internal/src/state/richtext_state.rs

@@ -877,7 +877,7 @@ mod snapshot {
             TextStyleInfoFlag,
         },
         encoding::value_register::ValueRegister,
-        state::{ContainerCreationContext, ContainerState, FastStateSnashot},
+        state::{ContainerCreationContext, ContainerState, FastStateSnapshot},
         utils::lazy::LazyLoad,
     };
 
@@ -915,7 +915,7 @@ mod snapshot {
         marks: Vec<EncodedMark>,
     }
 
-    impl FastStateSnashot for RichtextState {
+    impl FastStateSnapshot for RichtextState {
         fn encode_snapshot_fast<W: std::io::prelude::Write>(&mut self, mut w: W) {
             let value = self.get_value();
             postcard::to_io(&value, &mut w).unwrap();

crates/loro-internal/src/state/tree_state.rs

@@ -1234,7 +1234,7 @@ mod snapshot {
     use loro_common::{IdFull, PeerID, TreeID};
     use serde_columnar::columnar;
 
-    use crate::{encoding::value_register::ValueRegister, state::FastStateSnashot};
+    use crate::{encoding::value_register::ValueRegister, state::FastStateSnapshot};
 
     use super::{TreeNode, TreeParentId, TreeState};
 
@@ -1302,7 +1302,7 @@ mod snapshot {
         )
     }
 
-    impl FastStateSnashot for TreeState {
+    impl FastStateSnapshot for TreeState {
         fn encode_snapshot_fast<W: std::io::prelude::Write>(&mut self, mut w: W) {
             let alive_tree_nodes = self.tree_nodes();
             let deleted_tree_nodes = self.deleted_tree_nodes();