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<?php

namespace Lavary\Menu;

use Illuminate\Support\Facades\View;

class Menu
{
    /**
     * Menu collection.
     *
     * @var \Illuminate\Support\Collection
     */
    protected $collection;

/**
     * List of menu builders.
     *
     * @var []Builder
     */
    protected $menu = [];

/**
     * Initializing the Menu manager
     */
    public function __construct()
    {
        // creating a collection for storing menu builders
        $this->collection = new Collection();
    }

/**
     * Check if a menu builder exists.
     *
     * @param string $name
     *
     * @return bool
     */
    public function exists($name)
    {
        return array_key_exists($name, $this->menu);
    }

/**
     * Create a new menu builder instance.
     *
     * @param string   $name
     * @param callable $callback
     *
     * @return Builder
     */
    public function makeOnce($name, $callback)
    {
        if ($this->exists($name)) {
            return null;
        }

return $this->make($name, $callback);
    }

/**
     * Create a new menu builder instance.
     *
     * @param string   $name
     * @param callable $callback
     * @param array $options (optional, it will be combined with the options to be applied)
     *
     * @return Builder
     */
    public function make($name, $callback, array $options = [])
    {
        if (!is_callable($callback)) {
            return null;
        }

if (!array_key_exists($name, $this->menu)) {
            $this->menu[$name] = new Builder($name, array_merge($this->loadConf($name), $options));
        }

// Registering the items
        call_user_func($callback, $this->menu[$name]);

// Storing each menu instance in the collection
        $this->collection->put($name, $this->menu[$name]);

// Make the instance available in all views
        View::share($name, $this->menu[$name]);

return $this->menu[$name];
    }

/**
     * Loads and merges configuration data.
     *
     * @param string $name
     *
     * @return array
     */
    public function loadConf($name)
    {
        $options = config('laravel-menu.settings');
        $defaultOptions = isset($options['default']) ? $options['default'] : [];
        $name = strtolower($name);

if (isset($options[$name]) && is_array($options[$name])) {
            return array_merge($defaultOptions, $options[$name]);
        }

return $defaultOptions;
    }

/**
     * Return Menu builder instance from the collection by key.
     *
     * @param string $key
     *
     * @return Builder
     */
    public function get($key)
    {
        return $this->collection->get($key);
    }

/**
     * Return Menu builder collection.
     *
     * @return \Illuminate\Support\Collection
     */
    public function getCollection()
    {
        return $this->collection;
    }

/**
     * Alias for getCollection.
     *
     * @return \Illuminate\Support\Collection
     */
    public function all()
    {
        return $this->collection;
    }
}