Fix ts2swift type alias names and add console alias test

Author: kateinoigakukun

Plugins/BridgeJS/Sources/TS2Swift/JavaScript/src/processor.js

@@ -56,6 +56,8 @@ export class TypeProcessor {
         this.processedTypes = new Map();
         /** @type {Map<ts.Type, ts.Node>} Seen position by type */
         this.seenTypes = new Map();
+        /** @type {Map<ts.Type, string>} Preferred alias names by underlying type */
+        this.aliasNameByType = new Map();
         /** @type {string[]} Collected Swift code lines */
         this.swiftLines = [];
         /** @type {Set<string>} */
@@ -747,8 +749,8 @@ export class TypeProcessor {
      * @private
      */
     visitStructuredType(type, diagnosticNode, members) {
-        const symbol = type.getSymbol() ?? type.aliasSymbol;
-        const name = symbol?.name ?? this.checker.typeToString(type);
+        const symbol = type.aliasSymbol ?? type.getSymbol();
+        const name = type.aliasSymbol?.name ?? symbol?.name ?? this.checker.typeToString(type);
         if (!name) return;
         if (this.emittedStructuredTypeNames.has(name)) return;
         this.emittedStructuredTypeNames.add(name);
@@ -760,7 +762,7 @@ export class TypeProcessor {
         if (jsNameArg) args.push(jsNameArg);
         const annotation = this.renderMacroAnnotation("JSClass", args);
         const typeName = this.renderIdentifier(swiftName);
-        const docNode = symbol?.getDeclarations()?.[0] ?? diagnosticNode;
+        const docNode = type.aliasSymbol?.getDeclarations()?.[0] ?? symbol?.getDeclarations()?.[0] ?? diagnosticNode;
         if (docNode) {
             this.emitDocComment(docNode, { indent: "" });
         }

Plugins/BridgeJS/Sources/TS2Swift/JavaScript/test/__snapshots__/ts2swift.test.js.snap

@@ -426,6 +426,23 @@ exports[`ts2swift > snapshots Swift output for TypeAlias.d.ts > TypeAlias 1`] =
 "
 `;
 
+exports[`ts2swift > snapshots Swift output for TypeAliasObject.d.ts > TypeAliasObject 1`] = `
+"// NOTICE: This is auto-generated code by BridgeJS from JavaScriptKit,
+// DO NOT EDIT.
+//
+// To update this file, just rebuild your project or run
+// \`swift package bridge-js\`.
+
+@_spi(Experimental) @_spi(BridgeJS) import JavaScriptKit
+
+@JSFunction func console() throws(JSException) -> Console
+
+@JSClass struct Console {
+    @JSFunction func log(_ message: String) throws(JSException) -> Void
+}
+"
+`;
+
 exports[`ts2swift > snapshots Swift output for TypeScriptClass.d.ts > TypeScriptClass 1`] = `
 "// NOTICE: This is auto-generated code by BridgeJS from JavaScriptKit,
 // DO NOT EDIT.

Plugins/BridgeJS/Sources/TS2Swift/JavaScript/test/fixtures/TypeAliasObject.d.ts

@@ -0,0 +1,5 @@
+export type Console = {
+    log(message: string): void;
+};
+
+export function console(): Console;