support using strings directly as level input and output data

src/level.rs

@@ -9,12 +9,24 @@ pub struct Level {
 	#[serde(default)]
 	is_sandbox: bool,
 	init_board: Option<String>,
-	inputs: Vec<u8>,
-	outputs: Vec<u8>,
-	#[serde(default)]
-	input_is_text: bool,
-	#[serde(default)]
-	output_is_text: bool,
+	inputs: IOData,
+	outputs: IOData,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+#[serde(untagged)]
+pub enum IOData {
+	Bytes(Vec<u8>),
+	Text(String),
+}
+
+impl IOData {
+	pub fn as_bytes(&self) -> &[u8] {
+		match self {
+			IOData::Bytes(b) => b,
+			IOData::Text(t) => t.as_bytes(),
+		}
+	}
 }
 
 impl Level {
@@ -43,18 +55,18 @@ impl Level {
 	}
 
 	pub fn inputs(&self) -> &[u8] {
-		&self.inputs
+		self.inputs.as_bytes()
 	}
 
 	pub fn outputs(&self) -> &[u8] {
-		&self.outputs
+		self.outputs.as_bytes()
 	}
 
 	pub fn input_is_text(&self) -> bool {
-		self.input_is_text
+		matches!(self.inputs, IOData::Text(_))
 	}
 
 	pub fn output_is_text(&self) -> bool {
-		self.output_is_text
+		matches!(self.outputs, IOData::Text(_))
 	}
 }