From f07922cdb4c91f6b58537207668275f81e4f2ca2 Mon Sep 17 00:00:00 2001
From: Vincent Herlemont <vincent@herlemont.fr>
Date: Sun, 29 Oct 2023 09:43:15 +0100
Subject: [PATCH] feat: default postcard 1.0

---
 libraries/native_model/Cargo.toml              |  3 ++-
 libraries/native_model/src/codec/mod.rs        |  1 +
 .../native_model/src/codec/postcard_1_0.rs     | 18 ++++++++++++++++++
 libraries/native_model/tests_crate/Cargo.toml  |  4 ++--
 .../example/default_codec/bincode_2_rc.rs      |  2 +-
 .../tests/example/default_codec/mod.rs         |  3 ++-
 .../example/default_codec/postcard_1_0.rs      | 18 ++++++++++++++++++
 7 files changed, 44 insertions(+), 5 deletions(-)
 create mode 100644 libraries/native_model/src/codec/postcard_1_0.rs
 create mode 100644 libraries/native_model/tests_crate/tests/example/default_codec/postcard_1_0.rs

diff --git a/libraries/native_model/Cargo.toml b/libraries/native_model/Cargo.toml
index 632312c7..6987ecb4 100644
--- a/libraries/native_model/Cargo.toml
+++ b/libraries/native_model/Cargo.toml
@@ -23,6 +23,7 @@ native_model_macro = { version = "0.3.30", path = "native_model_macro" }
 serde = { version = "1.0", features = ["derive"], optional = true }
 bincode_1_3 = { package = "bincode", version = "1.3", optional = true }
 bincode_2_rc = { package = "bincode", version = "2.0.0-rc.3", features = ["serde"], optional = true }
+postcard_1_0 = { package = "postcard", version = "1.0", features = ["alloc"], optional = true }
 
 [dev-dependencies]
 serde_json = "1.0"
@@ -30,7 +31,7 @@ criterion = { version = "0.5.1" }
 skeptic = "0.13"
 
 [features]
-default = ["serde", "bincode_1_3", "bincode_2_rc"]
+default = ["serde", "bincode_1_3", "bincode_2_rc", "postcard_1_0"]
 
 [[bench]]
 name = "overhead"
diff --git a/libraries/native_model/src/codec/mod.rs b/libraries/native_model/src/codec/mod.rs
index 83691899..e58dccc1 100644
--- a/libraries/native_model/src/codec/mod.rs
+++ b/libraries/native_model/src/codec/mod.rs
@@ -1,5 +1,6 @@
 pub mod bincode_1_3;
 pub mod bincode_2_rc;
+pub mod postcard_1_0;
 
 /// Encode trait for your own encoding method.
 ///
diff --git a/libraries/native_model/src/codec/postcard_1_0.rs b/libraries/native_model/src/codec/postcard_1_0.rs
new file mode 100644
index 00000000..ddea1584
--- /dev/null
+++ b/libraries/native_model/src/codec/postcard_1_0.rs
@@ -0,0 +1,18 @@
+use postcard_1_0::{from_bytes, to_allocvec, Error};
+use serde::{Deserialize, Serialize};
+
+pub struct PostCard;
+
+impl<T: Serialize> super::Encode<T> for PostCard {
+    type Error = Error;
+    fn encode(obj: &T) -> Result<Vec<u8>, Error> {
+        Ok(to_allocvec(obj)?)
+    }
+}
+
+impl<T: for<'a> Deserialize<'a>> super::Decode<T> for PostCard {
+    type Error = Error;
+    fn decode(data: Vec<u8>) -> Result<T, Error> {
+        Ok(from_bytes(&data)?)
+    }
+}
diff --git a/libraries/native_model/tests_crate/Cargo.toml b/libraries/native_model/tests_crate/Cargo.toml
index ac4fb18b..70237955 100644
--- a/libraries/native_model/tests_crate/Cargo.toml
+++ b/libraries/native_model/tests_crate/Cargo.toml
@@ -3,11 +3,11 @@ name = "tests_crate"
 version = "0.1.0"
 edition = "2021"
 
-
 [workspace]
 
 [dev-dependencies]
 native_model = { path = "../" }
 serde = { version = "1.0", features = ["derive"] }
 bincode = { version = "2.0.0-rc.3", features = ["serde"] }
-anyhow = "1.0.44"
\ No newline at end of file
+anyhow = "1.0"
+postcard = { version = "1.0", features = ["alloc"] }
\ No newline at end of file
diff --git a/libraries/native_model/tests_crate/tests/example/default_codec/bincode_2_rc.rs b/libraries/native_model/tests_crate/tests/example/default_codec/bincode_2_rc.rs
index 3ee86804..90580a53 100644
--- a/libraries/native_model/tests_crate/tests/example/default_codec/bincode_2_rc.rs
+++ b/libraries/native_model/tests_crate/tests/example/default_codec/bincode_2_rc.rs
@@ -1,4 +1,4 @@
-use native_model::{native_model, bincode_2_rc};
+use native_model::{native_model};
 use serde::Deserialize;
 use serde::Serialize;
 
diff --git a/libraries/native_model/tests_crate/tests/example/default_codec/mod.rs b/libraries/native_model/tests_crate/tests/example/default_codec/mod.rs
index b146d1f8..eb9f386f 100644
--- a/libraries/native_model/tests_crate/tests/example/default_codec/mod.rs
+++ b/libraries/native_model/tests_crate/tests/example/default_codec/mod.rs
@@ -1,2 +1,3 @@
 mod bincode_1_3;
-mod bincode_2_rc;
\ No newline at end of file
+mod bincode_2_rc;
+mod postcard_1_0;
\ No newline at end of file
diff --git a/libraries/native_model/tests_crate/tests/example/default_codec/postcard_1_0.rs b/libraries/native_model/tests_crate/tests/example/default_codec/postcard_1_0.rs
new file mode 100644
index 00000000..a65867b6
--- /dev/null
+++ b/libraries/native_model/tests_crate/tests/example/default_codec/postcard_1_0.rs
@@ -0,0 +1,18 @@
+use native_model::{native_model};
+use serde::Deserialize;
+use serde::Serialize;
+
+#[derive(Serialize, Deserialize, PartialEq, Debug)]
+#[native_model(id = 1, version = 1, with = native_model::postcard_1_0::PostCard)]
+struct Example {
+    a: u32,
+    b: u32,
+}
+
+#[test]
+fn encode_decode() {
+    let example = Example { a: 1, b: 2 };
+    let bytes = native_model::encode(&example).unwrap();
+    let (example, _) = native_model::decode::<Example>(bytes).unwrap();
+    assert_eq!(example, Example { a: 1, b: 2 });
+}