<?php
/**
 * Helper methods
 *
 * @package     Kirki
 * @category    Core
 * @author      Aristeides Stathopoulos
 * @copyright   Copyright (c) 2016, Aristeides Stathopoulos
 * @license     http://opensource.org/licenses/gpl-2.0.php GNU Public License
 * @since       1.0
 */

// Exit if accessed directly
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'Kirki_Helper' ) ) {
	class Kirki_Helper {

		public static function array_replace_recursive( $array, $array1 ) {
			// handle the arguments, merge one by one
			$args  = func_get_args();
			$array = $args[0];
			if ( ! is_array( $array ) ) {
				return $array;
			}
			$count = count( $args );
			for ( $i = 1; $i < $count; $i++ ) {
				if ( is_array( $args[ $i ] ) ) {
					$array = self::recurse( $array, $args[ $i ] );
				}
			}
			return $array;
		}

		public static function recurse( $array, $array1 ) {
			foreach ( $array1 as $key => $value ) {
				// create new key in $array, if it is empty or not an array
				if ( ! isset( $array[ $key ] ) || ( isset( $array[ $key ] ) && ! is_array( $array[ $key ] ) ) ) {
					$array[ $key ] = array();
				}

				// overwrite the value in the base array
				if ( is_array( $value ) ) {
					$value = self::recurse( $array[ $key ], $value );
				}
				$array[ $key ] = $value;
			}
			return $array;
		}

		/**
		 * Initialize the WP_Filesystem
		 */
		public static function init_filesystem() {
			global $wp_filesystem;
			if ( empty( $wp_filesystem ) ) {
				require_once ( ABSPATH . '/wp-admin/includes/file.php' );
				WP_Filesystem();
			}
		}

		/**
		 * Helper function
		 *
		 * removes an item from an array
		 */
		public function array_delete( $idx, $array ) {

			// Early exit and return null if $array is not an array.
			if ( ! is_array( $array ) ) {
				return null;
			}

			unset( $array[ $idx ] );
			return array_values( $array );

		}

		public static function array_flatten( array $array ) {
			$flat  = array(); // initialize return array
			$stack = array_values( $array );
			while ( $stack ) { // process stack until done
				$value = array_shift( $stack );
				if ( is_array( $value ) ) { // a value to further process
					$stack = array_merge( array_keys( $value ), $stack );
				} else { // a value to take
					$flat[] = $value;
				}
			}
			return $flat;
		}

		/**
		 * Returns the attachment object
		 *
		 * @var 	string		URL to the image
		 * @return 	string		numeric ID of the attachement.
		 */
		public static function get_image_id( $url ) {
			return url_to_postid( $url );
		}

		/**
		 * Returns an array of the attachment's properties.
		 *
		 * @var 	string		URL to the image
		 * @return 	array		array()
		 */
		public static function get_image_from_url( $url ) {

			$image_id = self::get_image_id( $url );
			$image    = wp_get_attachment_image_src( $image_id, 'full' );

			return array(
				'url'       => $image[0],
				'width'     => $image[1],
				'height'    => $image[2],
				'thumbnail' => $image[3],
			);

		}

		/**
		 * Helper function that gets posts and fomats them in a way so they can be used in select fields etc.
		 */
		public static function get_posts( $args ) {

			// Get the posts
			$posts = get_posts( $args );

			// properly format the array.
			$items = array();
			foreach ( $posts as $post ) {
				$items[ $post->ID ] = $post->post_title;
			}

			return $items;

		}

		public static function get_taxonomies() {

			$items = array();

			// Get the taxonomies
			$taxonomies = get_taxonomies( array( 'public' => true ) );
			// Build the array
			foreach ( $taxonomies as $taxonomy ) {
				$id           = $taxonomy;
				$taxonomy     = get_taxonomy( $taxonomy );
				$items[ $id ] = $taxonomy->labels->name;
			}

			return $items;

		}

		public static function get_post_types() {

			$items = array();

			// Get the post types
			$post_types = get_post_types( array( 'public' => true ), 'objects' );
			// Build the array
			foreach ( $post_types as $post_type ) {
				$items[ $post_type->name ] = $post_type->labels->name;
			}

			return $items;

		}

	}
}