Added contracts and intances

Author: bryanadamloh97

src/Contracts/UrlFactory.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace CodeOfDigital\LaravelUrlShortener\Contracts;
+
+interface UrlFactory
+{
+    public function shortener($name = null);
+}

src/UrlShortenerInstance.php

@@ -0,0 +1,76 @@
+<?php
+
+namespace CodeOfDigital\LaravelUrlShortener;
+
+use CodeOfDigital\LaravelUrlShortener\Contracts\UrlFactory;
+use http\Exception\InvalidArgumentException;
+use Illuminate\Foundation\Application;
+use Illuminate\Support\Str;
+
+class UrlShortenerInstance implements UrlFactory
+{
+    protected $app;
+    protected $shorteners;
+
+    /**
+     * Create a new URL Shortener instance.
+     *
+     * @param Application $app
+     */
+    public function __construct(Application $app)
+    {
+        $this->app = $app;
+        $this->shorteners = [];
+    }
+
+    /**
+     * Get the default URL shortener driver
+     *
+     * @return string
+     */
+    public function getUrlDefaultDriver(): string
+    {
+        return $this->app['config']['url-shortener.default'];
+    }
+
+    /**
+     * Set the default URL shortener driver
+     *
+     * @return $this
+     */
+    public function setUrlDefaultDriver($name): UrlShortenerInstance
+    {
+        $this->app['config']['url-shortener.default'] = $name;
+        return $this;
+    }
+
+    public function getUrlShortenerConfig($name)
+    {
+        return config("url-shortener.shorteners.{$name}");
+    }
+
+    public function resolveUrlDriver($name)
+    {
+        $config = $this->getUrlShortenerConfig($name);
+
+        if (is_null($config) || !array_key_exists('driver', $config))
+            throw new InvalidArgumentException("URL shortener driver [{$name}] is not defined in the configuration.");
+
+        $driverMethodName = 'create'.Str::studly($config['driver']).'Driver';
+
+        if (method_exists($this, $driverMethodName))
+            return $this->{$driverMethodName}($config);
+
+        throw new InvalidArgumentException("URL shortener driver [{$config['driver']}] is not supported in this package.");
+    }
+
+    public function shortener($name = null)
+    {
+        $name = $name ?: $this->getUrlDefaultDriver();
+
+        if (array_key_exists($name, $this->shorteners))
+            return $this->shorteners[$name];
+
+        return $this->shorteners[$name] = $this->resolveUrlDriver($name);
+    }
+}

src/UrlShortenerServiceProvider.php

@@ -3,16 +3,28 @@
 namespace CodeOfDigital\LaravelUrlShortener;
 
 use Illuminate\Support\ServiceProvider;
+use Illuminate\Support\Str;
 
 class UrlShortenerServiceProvider extends ServiceProvider
 {
     public function boot()
     {
         $this->mergeConfigFrom(__DIR__.'/../config/url-shortener.php', 'url-shortener');
+        $this->publishAssets();
+    }
+
+    protected function publishAssets()
+    {
+        if (!$this->app->runningInConsole() || Str::contains($this->app->version(), 'lumen'))
+            return;
+
+        $this->publishes([__DIR__.'/../config/url-shortener.php' => config_path('url-shortener.php')]);
     }
 
     public function register()
     {
-        parent::register(); // TODO: Change the autogenerated stub
+        $this->app->singleton('url.shortener', function ($app) {
+            return new UrlShortenerInstance($app);
+        });
     }
 }