<?php

/**
 * Base Controller for Admin module
 */
class Admin_Controller extends MY_Controller {

	protected $mLoginUrl = 'admin/login';
	protected $mUsefulLinks = array();

	// Grocery CRUD or Image CRUD
	protected $mCrud;
	protected $mCrudUnsetFields;

	// Constructor
	public function __construct()
	{
		parent::__construct();

		// only login users can access Admin Panel
		$this->verify_login();

		// store site config values
		$this->mUsefulLinks = $this->mSiteConfig['useful_links'];
	}

	// Render template (override parent)
	protected function render($view_file, $layout = 'default')
	{
		// load skin according to user role
		$config = $this->mSiteConfig['adminlte'][$this->mUserMainGroup];
		$this->mBodyClass = $config['skin'];
		
		// additional view data
		$this->mViewData['useful_links'] = $this->mUsefulLinks;

		parent::render($view_file);
	}

	// Initialize CRUD table via Grocery CRUD library
	// Reference: http://www.grocerycrud.com/
	protected function generate_crud($table, $subject = '')
	{
		// create CRUD object
		$this->load->library('Grocery_CRUD');
		$crud = new grocery_CRUD();
		$crud->set_table($table);

		// auto-generate subject
		if ( empty($subject) )
		{
			$crud->set_subject(humanize(singular($table)));
		}

		// load settings from: application/config/grocery_crud.php
		$this->load->config('grocery_crud');
		$this->mCrudUnsetFields = $this->config->item('grocery_crud_unset_fields');

		if ($this->config->item('grocery_crud_unset_jquery'))
			$crud->unset_jquery();

		if ($this->config->item('grocery_crud_unset_jquery_ui'))
			$crud->unset_jquery_ui();

		if ($this->config->item('grocery_crud_unset_print'))
			$crud->unset_print();

		if ($this->config->item('grocery_crud_unset_export'))
			$crud->unset_export();

		if ($this->config->item('grocery_crud_unset_read'))
			$crud->unset_read();

		foreach ($this->config->item('grocery_crud_display_as') as $key => $value)
			$crud->display_as($key, $value);

		// other custom logic to be done outside
		$this->mCrud = $crud;
		return $crud;
	}
	
	// Set field(s) to color picker
	protected function set_crud_color_picker()
	{
		$args = func_get_args();
		if(isset($args[0]) && is_array($args[0]))
		{
			$args = $args[0];
		}
		foreach ($args as $field)
		{
			$this->mCrud->callback_field($field, array($this, 'callback_color_picker'));
		}
	}

	public function callback_color_picker($value = '', $primary_key = NULL, $field = NULL)
	{
		$name = $field->name;
		return "<input type='color' name='$name' value='$value' style='width:80px' />";
	}

	// Append additional fields to unset from CRUD
	protected function unset_crud_fields()
	{
		$args = func_get_args();
		if(isset($args[0]) && is_array($args[0]))
		{
			$args = $args[0];
		}
		$this->mCrudUnsetFields = array_merge($this->mCrudUnsetFields, $args);
	}

	// Initialize CRUD album via Image CRUD library
	// Reference: http://www.grocerycrud.com/image-crud
	protected function generate_image_crud($table, $url_field, $upload_path, $order_field = 'pos', $title_field = '')
	{
		// create CRUD object
		$this->load->library('Image_crud');
		$crud = new image_CRUD();
		$crud->set_table($table);
		$crud->set_url_field($url_field);
		$crud->set_image_path($upload_path);

		// [Optional] field name of image order (e.g. "pos")
		if ( !empty($order_field) )
		{
			$crud->set_ordering_field($order_field);
		}

		// [Optional] field name of image caption (e.g. "caption")
		if ( !empty($title_field) )
		{
			$crud->set_title_field($title_field);
		}

		// other custom logic to be done outside
		$this->mCrud = $crud;
		return $crud;
	}

	// Render CRUD
	protected function render_crud()
	{
		// logic specific for Grocery CRUD only
		$crud_obj_name = strtolower(get_class($this->mCrud));
		if ($crud_obj_name==='grocery_crud')
		{
			$this->mCrud->unset_fields($this->mCrudUnsetFields);	
		}

		// render CRUD
		$crud_data = $this->mCrud->render();

		// append scripts
		$this->add_stylesheet($crud_data->css_files, FALSE);
		$this->add_script($crud_data->js_files, TRUE, 'head');

		// display view
		$this->mViewData['crud_output'] = $crud_data->output;
		$this->render('crud');
	}
}