fix(wasm): add read_file impl for WasmEnvironment

Author: Tim-Paik

crates/rhai-wasm/src/environment.rs

@@ -171,6 +171,7 @@ pub(crate) struct WasmEnvironment {
     js_on_stderr: Function,
     js_glob_files: Function,
     js_read_file: Function,
+    js_write_file: Function,
     js_sleep: Function,
     js_is_absolute: Function,
     js_cwd: Function,
@@ -203,6 +204,9 @@ impl From<JsValue> for WasmEnvironment {
             js_read_file: js_sys::Reflect::get(&val, &JsValue::from_str("js_read_file"))
                 .unwrap()
                 .into(),
+            js_write_file: js_sys::Reflect::get(&val, &JsValue::from_str("js_write_file"))
+                .unwrap()
+                .into(),
             js_is_absolute: js_sys::Reflect::get(&val, &JsValue::from_str("js_is_absolute"))
                 .unwrap()
                 .into(),
@@ -308,6 +312,18 @@ impl Environment for WasmEnvironment {
         Ok(Uint8Array::from(ret).to_vec())
     }
 
+    async fn write_file(&self, path: &Path, bytes: &[u8]) -> Result<(), anyhow::Error> {
+        let path_str = JsValue::from_str(&path.to_string_lossy());
+        let this = JsValue::null();
+        let data = JsValue::from(js_sys::Uint8Array::from(bytes));
+        let res: JsValue = self.js_write_file.call2(&this, &path_str, &data).unwrap();
+
+        JsFuture::from(Promise::from(res))
+            .await
+            .map(|_| ())
+            .map_err(|err| anyhow!("{:?}", err))
+    }
+
     fn is_absolute(&self, path: &Path) -> bool {
         let path_str = JsValue::from_str(&path.to_string_lossy());
         let this = JsValue::null();

editors/vscode/src/server.ts

@@ -31,6 +31,7 @@ process.on("message", async (d: RpcMessage) => {
         glob: p => glob.sync(p),
         isAbsolute: p => path.isAbsolute(p),
         readFile: path => fsPromise.readFile(path),
+        writeFile: (path, data) => fsPromise.writeFile(path, data),
         stderr: process.stderr,
         stdErrAtty: () => process.stderr.isTTY,
         stdin: process.stdin,

js/core/src/environment.ts

@@ -36,6 +36,10 @@ export interface Environment {
    * Read a file at the given path.
    */
   readFile: (path: string) => Promise<Uint8Array>;
+  /**
+   * Write a file at the given path.
+   */
+  writeFile: (path: string, data: Uint8Array) => Promise<void>;
   /**
    * Search a glob file pattern and return the matched files.
    */
@@ -93,6 +97,7 @@ export function convertEnv(env: Environment): any {
     js_url_to_file_path: env.urlToFilePath,
     js_sleep: env.sleep,
     js_read_file: env.readFile,
+    js_write_file: env.writeFile,
   };
 }