fix merge

packages/html/src/file_data.rs

@@ -0,0 +1,53 @@
+use std::{any::Any, collections::HashMap};
+
+pub trait HasFileData: std::any::Any {
+    fn files(&self) -> Option<std::sync::Arc<dyn FileEngine>> {
+        None
+    }
+}
+
+#[cfg(feature = "serialize")]
+/// A file engine that serializes files to bytes
+#[derive(serde::Serialize, serde::Deserialize, Debug, PartialEq, Clone)]
+pub struct SerializedFileEngine {
+    pub files: HashMap<String, Vec<u8>>,
+}
+
+#[cfg(feature = "serialize")]
+#[async_trait::async_trait(?Send)]
+impl FileEngine for SerializedFileEngine {
+    fn files(&self) -> Vec<String> {
+        self.files.keys().cloned().collect()
+    }
+
+    async fn read_file(&self, file: &str) -> Option<Vec<u8>> {
+        self.files.get(file).cloned()
+    }
+
+    async fn read_file_to_string(&self, file: &str) -> Option<String> {
+        self.read_file(file)
+            .await
+            .map(|bytes| String::from_utf8_lossy(&bytes).to_string())
+    }
+
+    async fn get_native_file(&self, file: &str) -> Option<Box<dyn Any>> {
+        self.read_file(file)
+            .await
+            .map(|val| Box::new(val) as Box<dyn Any>)
+    }
+}
+
+#[async_trait::async_trait(?Send)]
+pub trait FileEngine {
+    // get a list of file names
+    fn files(&self) -> Vec<String>;
+
+    // read a file to bytes
+    async fn read_file(&self, file: &str) -> Option<Vec<u8>>;
+
+    // read a file to string
+    async fn read_file_to_string(&self, file: &str) -> Option<String>;
+
+    // returns a file in platform's native representation
+    async fn get_native_file(&self, file: &str) -> Option<Box<dyn Any>>;
+}