Enable Quick Fix in the playground (#1395)

playground/.eslintrc

@@ -14,7 +14,8 @@
   ],
   "rules": {
     // Disable some recommended rules that we don't want to enforce.
-    "@typescript-eslint/no-explicit-any": "off"
+    "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/no-empty-function": "off"
   },
   "settings": {
     "react": {

playground/src/App.tsx

@@ -61,17 +61,17 @@ const defaultConfig = getDefaultConfig(AVAILABLE_OPTIONS);
 
 export default function App() {
   const monaco = useMonaco();
-  const [ruffInitialized, setRuffInitialized] = useState<boolean>(false);
+  const [initialized, setInitialized] = useState<boolean>(false);
   const [config, setConfig] = useState<Config | null>(null);
   const [source, setSource] = useState<string | null>(null);
   const [error, setError] = useState<string | null>(null);
 
   useEffect(() => {
-    init().then(() => setRuffInitialized(true));
+    init().then(() => setInitialized(true));
   }, []);
 
   useEffect(() => {
-    if (source === null && config === null && monaco) {
+    if (source == null && config == null && monaco) {
       const [config, source] = restoreConfigAndSource();
       setConfig(config);
       setSource(source);
@@ -87,13 +87,7 @@ export default function App() {
   useEffect(() => {
     const editor = monaco?.editor;
     const model = editor?.getModels()[0];
-    if (
-      !editor ||
-      !model ||
-      !ruffInitialized ||
-      source === null ||
-      config === null
-    ) {
+    if (!editor || !model || !initialized || source == null || config == null) {
       return;
     }
 
@@ -118,11 +112,52 @@ export default function App() {
         severity: MarkerSeverity.Error,
       }))
     );
-  }, [config, source, monaco, ruffInitialized]);
+
+    const codeActionProvider = monaco?.languages.registerCodeActionProvider(
+      "python",
+      {
+        // @ts-expect-error: The type definition is wrong.
+        provideCodeActions: function (model, position) {
+          const actions = checks
+            .filter((check) => position.startLineNumber === check.location.row)
+            .filter((check) => check.fix)
+            .map((check) => ({
+              title: `Fix ${check.code}`,
+              id: `fix-${check.code}`,
+              kind: "quickfix",
+              edit: check.fix
+                ? {
+                    edits: [
+                      {
+                        resource: model.uri,
+                        versionId: model.getVersionId(),
+                        edit: {
+                          range: {
+                            startLineNumber: check.fix.location.row,
+                            startColumn: check.fix.location.column + 1,
+                            endLineNumber: check.fix.end_location.row,
+                            endColumn: check.fix.end_location.column + 1,
+                          },
+                          text: check.fix.content,
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+            }));
+          return { actions, dispose: () => {} };
+        },
+      }
+    );
+
+    return () => {
+      codeActionProvider?.dispose();
+    };
+  }, [config, source, monaco, initialized]);
 
   const handleEditorChange = useCallback(
     (value: string | undefined) => {
-      value && setSource(value);
+      setSource(value || "");
     },
     [setSource]
   );

src/lib_wasm.rs

@@ -5,6 +5,7 @@ use rustpython_parser::lexer::LexResult;
 use serde::{Deserialize, Serialize};
 use wasm_bindgen::prelude::*;
 
+use crate::autofix::Fix;
 use crate::checks::CheckCode;
 use crate::directives;
 use crate::linter::check_path;
@@ -27,6 +28,17 @@ export interface Check {
         row: number;
         column: number;
     };
+    fix: {
+        content: string;
+        location: {
+            row: number;
+            column: number;
+        };
+        end_location: {
+            row: number;
+            column: number;
+        };
+    } | null;
 };
 "#;
 
@@ -36,6 +48,7 @@ struct Message {
     message: String,
     location: Location,
     end_location: Location,
+    fix: Option<Fix>,
 }
 
 #[wasm_bindgen(start)]
@@ -71,7 +84,7 @@ pub fn check(contents: &str, options: JsValue) -> Result<JsValue, JsValue> {
         &locator,
         &directives,
         &settings,
-        false.into(),
+        flags::Autofix::Enabled,
         flags::Noqa::Enabled,
     )
     .map_err(|e| e.to_string())?;
@@ -83,6 +96,7 @@ pub fn check(contents: &str, options: JsValue) -> Result<JsValue, JsValue> {
             message: check.kind.body(),
             location: check.location,
             end_location: check.end_location,
+            fix: check.fix,
         })
         .collect();
 
@@ -118,7 +132,8 @@ mod test {
                 code: CheckCode::F634,
                 message: "If test is a tuple, which is always `True`".to_string(),
                 location: Location::new(1, 0),
-                end_location: Location::new(1, 15)
+                end_location: Location::new(1, 15),
+                fix: None,
             }]
         );
     }