Removing duplications on type declaration

Author: andrelmlins

package.json

@@ -3,7 +3,7 @@
   "description": "Typescript declaration generator for svelte with typescript",
   "main": "dist/index.js",
   "types": "dist/index.ts",
-  "version": "0.3.3",
+  "version": "0.3.4",
   "license": "MIT",
   "homepage": "https://github.com/andrelmlins/svelte-dts",
   "repository": "https://github.com/andrelmlins/svelte-dts",

src/transformer/svelte.ts

@@ -55,6 +55,16 @@ class SvelteTransformer implements ITransformer {
     );
   }
 
+  private addTypeForSearch(newType: ts.TypeReferenceNode): void {
+    const includeType = this.typesForSearch.map(
+      (item) => item.getText(this.sourceFile) === newType.getText(this.sourceFile)
+    );
+
+    if (!includeType) {
+      this.typesForSearch.push(newType);
+    }
+  }
+
   private compileProperty(node: ts.VariableStatement): void {
     node.declarationList.declarations.forEach((declaration) => {
       const name = declaration.name.getText(this.sourceFile);
@@ -66,7 +76,7 @@ class SvelteTransformer implements ITransformer {
         type = declaration.type.getText(this.sourceFile);
 
         if (ts.isTypeReferenceNode(declaration.type)) {
-          this.typesForSearch.push(declaration.type);
+          this.addTypeForSearch(declaration.type);
         }
 
         if (ts.isUnionTypeNode(declaration.type)) {
@@ -102,7 +112,7 @@ class SvelteTransformer implements ITransformer {
                 const type = member.type?.getText(this.sourceFile) || 'any';
 
                 if (member.type && ts.isTypeReferenceNode(member.type)) {
-                  this.typesForSearch.push(member.type);
+                  this.addTypeForSearch(member.type);
                 }
 
                 this.events.push({ name, type });