first upload all files

Modules/Wishlist/Database/Migrations/2018_10_01_224852175056_create_wish_lists_table.php

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+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateWishListsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('wish_lists', function (Blueprint $table) {
+            $table->integer('user_id')->unsigned();
+            $table->integer('product_id')->unsigned();
+            $table->timestamps();
+
+            $table->primary(['user_id', 'product_id']);
+            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
+            $table->foreign('product_id')->references('id')->on('products')->onDelete('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('wish_lists');
+    }
+}

Modules/Wishlist/Http/Controllers/WishlistController.php

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+<?php
+
+namespace Modules\Wishlist\Http\Controllers;
+
+class WishlistController
+{
+    /**
+     * Store a newly created resource in storage.
+     *
+     * @return \Illuminate\Http\Response
+     */
+    public function store()
+    {
+        if (! auth()->user()->wishlistHas(request('productId'))) {
+            auth()->user()->wishlist()->attach(request('productId'));
+        }
+    }
+
+    /**
+     * Destroy resources by the given id.
+     *
+     * @param string $productId
+     * @return void
+     */
+    public function destroy($productId)
+    {
+        auth()->user()->wishlist()->detach($productId);
+    }
+}

Modules/Wishlist/Http/Controllers/WishlistProductController.php

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+<?php
+
+namespace Modules\Wishlist\Http\Controllers;
+
+class WishlistProductController
+{
+    /**
+     * Display a listing of the resource.
+     *
+     * @return \Illuminate\Http\Response
+     */
+    public function index()
+    {
+        return auth()->user()
+            ->wishlist()
+            ->with('files')
+            ->latest()
+            ->paginate(20);
+    }
+}

Modules/Wishlist/Routes/public.php

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+<?php
+
+use Illuminate\Support\Facades\Route;
+
+Route::middleware('auth')->group(function () {
+    Route::post('wishlist', 'WishlistController@store')->name('wishlist.store');
+    Route::delete('wishlist/{productId}', 'WishlistController@destroy')->name('wishlist.destroy');
+
+    Route::get('wishlist/products', 'WishlistProductController@index')->name('wishlist.products.index');
+});

Modules/Wishlist/composer.json

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+{
+    "name": "fleetcart/wishlist",
+    "description": "The FleetCart Wishlist Module.",
+    "authors": [
+        {
+            "name": "Envay Soft",
+            "email": "envaysoft@gmail.com"
+        }
+    ],
+    "require": {
+        "php": "^8.0.2"
+    },
+    "autoload": {
+        "psr-4": {
+            "Modules\\Wishlist\\": ""
+        }
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "1.0.x-dev"
+        }
+    },
+    "config": {
+        "sort-packages": true
+    },
+    "minimum-stability": "dev"
+}

Modules/Wishlist/module.json

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+{
+    "name": "Wishlist",
+    "alias": "wishlist",
+    "description": "The FleetCart Wishlist Module.",
+    "priority": 100
+}