<?php

/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2017 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Association;

use Joomla\Utilities\ArrayHelper;

// phpcs:disable PSR1.Files.SideEffects
\defined('JPATH_PLATFORM') or die;
// phpcs:enable PSR1.Files.SideEffects

/**
 * Association Extension Helper
 *
 * @since  3.7.0
 */
abstract class AssociationExtensionHelper implements AssociationExtensionInterface
{
    /**
     * The extension name
     *
     * @var     array  $extension
     *
     * @since   3.7.0
     */
    protected $extension = 'com_??';

    /**
     * Array of item types
     *
     * @var     array  $itemTypes
     *
     * @since   3.7.0
     */
    protected $itemTypes = array();

    /**
     * Has the extension association support
     *
     * @var     boolean  $associationsSupport
     *
     * @since   3.7.0
     */
    protected $associationsSupport = false;

    /**
     * Checks if the extension supports associations
     *
     * @return  boolean  Supports the extension associations
     *
     * @since   3.7.0
     */
    public function hasAssociationsSupport()
    {
        return $this->associationsSupport;
    }

    /**
     * Get the item types
     *
     * @return  array  Array of item types
     *
     * @since   3.7.0
     */
    public function getItemTypes()
    {
        return $this->itemTypes;
    }

    /**
     * Get the associated items for an item
     *
     * @param   string  $typeName  The item type
     * @param   int     $itemId    The id of item for which we need the associated items
     *
     * @return   array
     *
     * @since   3.7.0
     */
    public function getAssociationList($typeName, $itemId)
    {
        $items = array();

        $associations = $this->getAssociations($typeName, $itemId);

        foreach ($associations as $key => $association) {
            $items[$key] = ArrayHelper::fromObject($this->getItem($typeName, (int) $association->id), false);
        }

        return $items;
    }

    /**
     * Get information about the type
     *
     * @param   string  $typeName  The item type
     *
     * @return  array  Array of item types
     *
     * @since   3.7.0
     */
    public function getType($typeName = '')
    {
        $fields  = $this->getFieldsTemplate();
        $tables  = array();
        $joins   = array();
        $support = $this->getSupportTemplate();
        $title   = '';

        return array(
            'fields'  => $fields,
            'support' => $support,
            'tables'  => $tables,
            'joins'   => $joins,
            'title'   => $title
        );
    }

    /**
     * Get information about the fields the type provides
     *
     * @param   string  $typeName  The item type
     *
     * @return  array  Array of support information
     *
     * @since   3.7.0
     */
    public function getTypeFields($typeName)
    {
        return $this->getTypeInformation($typeName, 'fields');
    }

    /**
     * Get information about the fields the type provides
     *
     * @param   string  $typeName  The item type
     *
     * @return  array  Array of support information
     *
     * @since   3.7.0
     */
    public function getTypeSupport($typeName)
    {
        return $this->getTypeInformation($typeName, 'support');
    }

    /**
     * Get information about the tables the type use
     *
     * @param   string  $typeName  The item type
     *
     * @return  array  Array of support information
     *
     * @since   3.7.0
     */
    public function getTypeTables($typeName)
    {
        return $this->getTypeInformation($typeName, 'tables');
    }

    /**
     * Get information about the table joins for the type
     *
     * @param   string  $typeName  The item type
     *
     * @return  array  Array of support information
     *
     * @since   3.7.0
     */
    public function getTypeJoins($typeName)
    {
        return $this->getTypeInformation($typeName, 'joins');
    }

    /**
     * Get the type title
     *
     * @param   string  $typeName  The item type
     *
     * @return  string  The type title
     *
     * @since   3.7.0
     */
    public function getTypeTitle($typeName)
    {
        $type = $this->getType($typeName);

        if (!\array_key_exists('title', $type)) {
            return '';
        }

        return $type['title'];
    }

    /**
     * Get information about the type
     *
     * @param   string  $typeName  The item type
     * @param   string  $part      part of the information
     *
     * @return  array Array of support information
     *
     * @since   3.7.0
     */
    private function getTypeInformation($typeName, $part = 'support')
    {
        $type = $this->getType($typeName);

        if (!\array_key_exists($part, $type)) {
            return array();
        }

        return $type[$part];
    }

    /**
     * Get a table field name for a type
     *
     * @param   string  $typeName   The item type
     * @param   string  $fieldName  The item type
     *
     * @return  string
     *
     * @since   3.7.0
     */
    public function getTypeFieldName($typeName, $fieldName)
    {
        $fields = $this->getTypeFields($typeName);

        if (!\array_key_exists($fieldName, $fields)) {
            return '';
        }

        $tmp = $fields[$fieldName];
        $pos = strpos($tmp, '.');

        if ($pos === false) {
            return $tmp;
        }

        return substr($tmp, $pos + 1);
    }

    /**
     * Get default values for support array
     *
     * @return  array
     *
     * @since   3.7.0
     */
    protected function getSupportTemplate()
    {
        return array(
            'state'    => false,
            'acl'      => false,
            'checkout' => false
        );
    }

    /**
     * Get default values for fields array
     *
     * @return  array
     *
     * @since   3.7.0
     */
    protected function getFieldsTemplate()
    {
        return array(
            'id'                  => 'a.id',
            'title'               => 'a.title',
            'alias'               => 'a.alias',
            'ordering'            => 'a.ordering',
            'menutype'            => '',
            'level'               => '',
            'catid'               => 'a.catid',
            'language'            => 'a.language',
            'access'              => 'a.access',
            'state'               => 'a.state',
            'created_user_id'     => 'a.created_by',
            'checked_out'         => 'a.checked_out',
            'checked_out_time'    => 'a.checked_out_time'
        );
    }
}