[Feature] Cache settings

src/SettingsServiceProvider.php

@@ -2,7 +2,11 @@
 
 namespace Backpack\Settings;
 
+use Backpack\Settings\app\Models\Setting;
+use Config;
+use Illuminate\Routing\Router;
 use Illuminate\Support\Facades\App;
+use Illuminate\Support\Facades\Cache;
 use Illuminate\Support\Facades\Schema;
 use Illuminate\Support\ServiceProvider;
 
@@ -38,13 +42,26 @@ public function boot()
         // define the routes for the application
         $this->setupRoutes();
 
-        // only use the Settings package if the Settings table is present in the database
-        if (!App::runningInConsole() && Schema::hasTable(config('backpack.settings.table_name'))) {
-            /** @var \Illuminate\Database\Eloquent\Model $modelClass */
-            $modelClass = config('backpack.settings.model', \Backpack\Settings\app\Models\Setting::class);
+        // listen for settings to be saved and clear the cache when any Setting model is saved.
+        Setting::saved(function () {
+            Cache::forget('backpack_settings_cache');
+        });
 
-            // get all settings from the database
-            $settings = $modelClass::all();
+        // only use the Settings package if the Settings table is present in the database
+        $tableExists = Cache::remember('backpack_settings_table_exists', config('backpack.settings.cache_time', 60), function () {
+            return Schema::hasTable(config('backpack.settings.table_name'));
+        });
+
+        if (!App::runningInConsole() && $tableExists) {
+            // get all settings from the database if they're not in the database.
+            $settings = Cache::remember('backpack_settings_cache', config('backpack.settings.cache_time', 60), function () {
+                /** @var \Illuminate\Database\Eloquent\Model $modelClass */
+                $modelClass = config('backpack.settings.model', \Backpack\Settings\app\Models\Setting::class);
+
+                // get all settings from the database
+                $settings = $modelClass::all();
+                return $settings;
+            });
 
             $config_prefix = config('backpack.settings.config_prefix');
 

src/app/Console/Commands/CacheUpdate.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Backpack\Settings\app\Console\Commands;
+
+use Artisan;
+use Backpack\Settings\app\Models\Setting;
+use Config;
+use Illuminate\Console\Command;
+use Illuminate\Support\Facades\Cache;
+
+class CacheUpdate extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'backpack_settings:cache_update';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Update Settings Cache Manually';
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        /** @var \Illuminate\Database\Eloquent\Model $modelClass */
+        $modelClass = config('backpack.settings.model', \Backpack\Settings\app\Models\Setting::class);
+
+        // get all settings from the database
+        $settings = $modelClass::all();
+
+        Cache::put('backpack_settings_cache', config('backpack.settings.cache_time', 60), $settings);
+
+    }
+
+}

src/config/backpack/settings.php

@@ -47,6 +47,16 @@
     */
     'config_prefix' => 'settings',
 
+    /*
+    |--------------------------------------------------------------------------
+    | Cache Time
+    |--------------------------------------------------------------------------
+    |
+    | The cache time for storing settings in a cache rather than querying the database on each load.
+    |
+     */
+    'cache_time' => 60,
+
     /*
     |--------------------------------------------------------------------------
     | Migration file name