Add rustg_toml_encode (tgstation#116)

Add rustg_toml_encode

Author: Mothblocks

dmsrc/toml.dm

@@ -6,3 +6,12 @@
 		return json_decode(output["content"])
 	else
 		CRASH(output["content"])
+
+#define rustg_raw_toml_encode(value) json_decode(call(RUST_G, "toml_encode")(json_encode(value)))
+
+/proc/rustg_toml_encode(value)
+	var/list/output = rustg_raw_toml_encode(value)
+	if (output["success"])
+		return output["content"]
+	else
+		CRASH(output["content"])

src/error.rs

@@ -34,6 +34,9 @@ pub enum Error {
     #[cfg(feature = "png")]
     #[error(transparent)]
     ImageEncoding(#[from] EncodingError),
+    #[cfg(feature = "http")]
+    #[error(transparent)]
+    JsonSerialization(#[from] serde_json::Error),
     #[error(transparent)]
     ParseInt(#[from] ParseIntError),
     #[error(transparent)]
@@ -49,9 +52,9 @@ pub enum Error {
     #[cfg(feature = "toml")]
     #[error(transparent)]
     TomlDeserialization(#[from] toml_dep::de::Error),
-    #[cfg(feature = "http")]
+    #[cfg(feature = "toml")]
     #[error(transparent)]
-    Serialization(#[from] serde_json::Error),
+    TomlSerialization(#[from] toml_dep::ser::Error),
     #[cfg(feature = "unzip")]
     #[error(transparent)]
     Unzip(#[from] ZipError),

src/toml.rs

@@ -20,3 +20,23 @@ fn toml_file_to_json_impl(path: &str) -> Result<String> {
         path,
     )?)?)?)
 }
+
+byond_fn!(fn toml_encode(value) {
+    serde_json::to_string(
+        &match toml_encode_impl(value) {
+            Ok(value) => serde_json::json!({
+                "success": true, "content": value
+            }),
+
+            Err(error) => serde_json::json!({
+                "success": false, "content": error.to_string()
+            }),
+        }
+    ).ok()
+});
+
+fn toml_encode_impl(value: &str) -> Result<String> {
+    Ok(toml_dep::to_string_pretty(&serde_json::from_str::<
+        toml_dep::Value,
+    >(value)?)?)
+}

tests/dm/toml.dme

@@ -19,3 +19,11 @@ var/test_json = @{"
 
     if (toml_output ~! json_decode(test_json))
         CRASH("test:\n[test_toml]\n \nexpected:\n[test_json]\n \nrustg:\n[json_encode(toml_output)]")
+
+/test/proc/check_rustg_toml_encode()
+    var/json_value = json_decode(test_json)
+    rustg_file_write(rustg_toml_encode(json_value), "test_encode.toml")
+    var/toml_output = rustg_read_toml_file("test_encode.toml")
+
+    if (toml_output ~! json_value)
+        CRASH("test:\n[test_toml]\n \nexpected:\n[test_json]\n \nrustg:\n[json_encode(toml_output)]")