[Typescript] Fix array model of alias to array (#6888)

* Add failing test

* Add model unaliasing

* Regenerate samples

Not really related to this bug fix, but probably necessary for ci
checks.

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptClientCodegen.java

@@ -839,10 +839,10 @@ public class TypeScriptClientCodegen extends DefaultCodegen implements CodegenCo
         Schema inner;
         if (ModelUtils.isArraySchema(p)) {
             inner = ((ArraySchema) p).getItems();
-            return this.getSchemaType(p) + "<" + this.getTypeDeclaration(inner) + ">";
+            return this.getSchemaType(p) + "<" + this.getTypeDeclaration(ModelUtils.unaliasSchema(this.openAPI, inner)) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
             inner = (Schema) p.getAdditionalProperties();
-            return "{ [key: string]: " + this.getTypeDeclaration(inner) + "; }";
+            return "{ [key: string]: " + this.getTypeDeclaration(ModelUtils.unaliasSchema(this.openAPI, inner)) + "; }";
         } else if (ModelUtils.isFileSchema(p)) {
             return "HttpFile";
         } else if (ModelUtils.isBinarySchema(p)) {

modules/openapi-generator/src/test/java/org/openapitools/codegen/typescript/TypeScriptClientCodegenTest.java

@@ -0,0 +1,44 @@
+package org.openapitools.codegen.typescript.fetch;
+
+import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.oas.models.media.*;
+import org.openapitools.codegen.TestUtils;
+import org.openapitools.codegen.languages.TypeScriptClientCodegen;
+import org.openapitools.codegen.utils.ModelUtils;
+import org.testng.Assert;
+import org.testng.annotations.Test;
+
+
+public class TypeScriptClientCodegenTest {
+    @Test
+    public void getTypeDeclarationTest() {
+        Schema<?> childSchema = new ArraySchema().items(new StringSchema());
+
+        OpenAPI api = TestUtils.createOpenAPI();
+        api.getComponents().addSchemas("Child", childSchema);
+
+        TypeScriptClientCodegen codegen = new TypeScriptClientCodegen();
+        codegen.setOpenAPI(api);
+
+        // Cf. issue #4968: Array of Alias of Array
+        Schema<?> parentSchema = new ArraySchema().items(
+            new Schema().$ref("#/components/schemas/Child")
+        );
+
+        ModelUtils.setGenerateAliasAsModel(false);
+        Assert.assertEquals(codegen.getTypeDeclaration(parentSchema), "Array<Array<string>>");
+
+        ModelUtils.setGenerateAliasAsModel(true);
+        Assert.assertEquals(codegen.getTypeDeclaration(parentSchema), "Array<Child>");
+
+        // Same for Map
+        parentSchema = new MapSchema().additionalProperties(new Schema().$ref("#/components/schemas/Child"));
+
+        ModelUtils.setGenerateAliasAsModel(false);
+        Assert.assertEquals(codegen.getTypeDeclaration(parentSchema), "{ [key: string]: Array<string>; }");
+
+        ModelUtils.setGenerateAliasAsModel(true);
+        Assert.assertEquals(codegen.getTypeDeclaration(parentSchema), "{ [key: string]: Child; }");
+    }
+
+}

samples/openapi3/client/petstore/typescript/builds/default/http/http.ts

@@ -73,7 +73,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-    	this.url = new URLParse(url, true);
+        this.url = new URLParse(url, true);
     }
 
     /**

samples/openapi3/client/petstore/typescript/builds/deno/http/http.ts

@@ -93,7 +93,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-    	this.url = new URLParse(url, true);
+        this.url = new URLParse(url, true);
     }
 
     /**

samples/openapi3/client/petstore/typescript/builds/inversify/http/http.ts

@@ -73,7 +73,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-    	this.url = new URLParse(url, true);
+        this.url = new URLParse(url, true);
     }
 
     /**

samples/openapi3/client/petstore/typescript/builds/jquery/http/http.ts

@@ -68,7 +68,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-    	this.url = new URLParse(url, true);
+        this.url = new URLParse(url, true);
     }
 
     /**

samples/openapi3/client/petstore/typescript/builds/object_params/http/http.ts

@@ -73,7 +73,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-    	this.url = new URLParse(url, true);
+        this.url = new URLParse(url, true);
     }
 
     /**