<?php
defined( 'ABSPATH' ) || die( 'Cheatin\' uh?' );

/**
 * Get user capacity to operate Imagify.
 *
 * @since  1.6.5
 * @since  1.6.11 Uses a string as describer for the first argument.
 * @author Grégory Viguier
 *
 * @param  string $describer Capacity describer. Possible values are 'manage', 'bulk-optimize', 'manual-optimize', 'auto-optimize', and 'optimize-file'.
 * @return string
 */
function imagify_get_capacity( $describer = 'manage' ) {
	static $edit_attachment_cap;

	// Back compat.
	if ( ! is_string( $describer ) ) {
		if ( $describer || ! is_multisite() ) {
			$describer = 'bulk-optimize';
		} else {
			$describer = 'manage';
		}
	}

	switch ( $describer ) {
		case 'manage':
			$capacity = imagify_is_active_for_network() ? 'manage_network_options' : 'manage_options';
			break;
		case 'optimize-file':
			$capacity = is_multisite() ? 'manage_network_options' : 'manage_options';
			break;
		case 'bulk-optimize':
			$capacity = 'manage_options';
			break;
		case 'optimize':
			// This is a generic capacity: don't use it unless you have no other choices!
			if ( ! isset( $edit_attachment_cap ) ) {
				$edit_attachment_cap = get_post_type_object( 'attachment' );
				$edit_attachment_cap = $edit_attachment_cap ? $edit_attachment_cap->cap->edit_posts : 'edit_posts';
			}

			$capacity = $edit_attachment_cap;
			break;
		case 'manual-optimize':
			// Must be used with an Attachment ID.
			$capacity = 'edit_post';
			break;
		case 'auto-optimize':
			$capacity = 'upload_files';
			break;
		default:
			$capacity = $describer;
	}

	/**
	 * Filter the user capacity used to operate Imagify.
	 *
	 * @since 1.0
	 * @since 1.6.5  Added $force_mono parameter.
	 * @since 1.6.11 Replaced $force_mono by $describer.
	 *
	 * @param string $capacity  The user capacity.
	 * @param string $describer Capacity describer. Possible values are 'manage', 'bulk-optimize', 'manual-optimize', 'auto-optimize', and 'optimize-file'.
	 */
	return apply_filters( 'imagify_capacity', $capacity, $describer );
}

/**
 * Tell if the current user has the required ability to operate Imagify.
 *
 * @since  1.6.11
 * @see    imagify_get_capacity()
 * @author Grégory Viguier
 *
 * @param  string $describer Capacity describer. See imagify_get_capacity() for possible values. Can also be a "real" user capacity.
 * @param  int    $post_id   A post ID (a gallery ID for NGG).
 * @return bool
 */
function imagify_current_user_can( $describer = 'manage', $post_id = null ) {
	static $can_upload;

	$post_id  = $post_id ? $post_id : null;
	$capacity = imagify_get_capacity( $describer );
	$user_can = false;

	if ( 'manage' !== $describer && 'bulk-optimize' !== $describer && 'optimize-file' !== $describer ) {
		// Describers that are not 'manage', 'bulk-optimize', and 'optimize-file' need an additional test for 'upload_files'.
		if ( ! isset( $can_upload ) ) {
			$can_upload = current_user_can( 'upload_files' );
		}

		if ( $can_upload ) {
			if ( 'upload_files' === $capacity ) {
				// We already know it's true.
				$user_can = true;
			} else {
				$user_can = current_user_can( $capacity, $post_id );
			}
		}
	} else {
		$user_can = current_user_can( $capacity );
	}

	/**
	 * Filter the current user ability to operate Imagify.
	 *
	 * @since 1.6.11
	 *
	 * @param bool   $user_can  Tell if the current user has the required ability to operate Imagify.
	 * @param string $capacity  The user capacity.
	 * @param string $describer Capacity describer. See imagify_get_capacity() for possible values. Can also be a "real" user capacity.
	 * @param int    $post_id   A post ID (a gallery ID for NGG).
	 */
	return apply_filters( 'imagify_current_user_can', $user_can, $capacity, $describer, $post_id );
}

/**
 * Get WP Direct filesystem object. Also define chmod constants if not done yet.
 *
 * @since  1.6.5
 * @author Grégory Viguier
 *
 * @return object A Imagify_Filesystem object.
 */
function imagify_get_filesystem() {
	return Imagify_Filesystem::get_instance();
}

/**
 * Tell if the current user can optimize custom folders.
 *
 * @since  1.7
 * @author Grégory Viguier
 *
 * @return bool
 */
function imagify_can_optimize_custom_folders() {
	static $can;

	if ( isset( $can ) ) {
		return $can;
	}

	// Check if the DB tables are ready.
	if ( ! Imagify_Folders_DB::get_instance()->can_operate() || ! Imagify_Files_DB::get_instance()->can_operate() ) {
		$can = false;
		return $can;
	}

	// Check for user capacity.
	if ( ! imagify_current_user_can( 'optimize-file' ) ) {
		$can = false;
		return $can;
	}

	$can = true;
	return $can;
}

/**
 * Sanitize an optimization context.
 *
 * @since  1.6.11
 * @author Grégory Viguier
 *
 * @param  string $context The context.
 * @return string
 */
function imagify_sanitize_context( $context ) {
	$context = preg_replace( '/[^a-zA-Z0-9_\-]/', '', $context );
	return $context ? $context : 'wp';
}

/**
 * Classes autoloader.
 *
 * @since  1.6.12
 * @author Grégory Viguier
 *
 * @param string $class Name of the class to include.
 */
function imagify_autoload( $class ) {
	// Generic classes.
	$classes = array(
		'Imagify_Abstract_Attachment'         => 1,
		'Imagify_Abstract_Background_Process' => 1,
		'Imagify_Abstract_Cron'               => 1,
		'Imagify_Abstract_DB'                 => 1,
		'Imagify_Abstract_Options'            => 1,
		'Imagify_Admin_Ajax_Post'             => 1,
		'Imagify_Assets'                      => 1,
		'Imagify_Attachment'                  => 1,
		'Imagify_Cron_Library_Size'           => 1,
		'Imagify_Cron_Rating'                 => 1,
		'Imagify_Cron_Sync_Files'             => 1,
		'Imagify_Custom_Folders'              => 1,
		'Imagify_Data'                        => 1,
		'Imagify_DB'                          => 1,
		'Imagify_File_Attachment'             => 1,
		'Imagify_Files_DB'                    => 1,
		'Imagify_Files_Iterator'              => 1,
		'Imagify_Files_List_Table'            => 1,
		'Imagify_Files_Recursive_Iterator'    => 1,
		'Imagify_Files_Scan'                  => 1,
		'Imagify_Files_Stats'                 => 1,
		'Imagify_Filesystem'                  => 1,
		'Imagify_Folders_DB'                  => 1,
		'Imagify_Notices'                     => 1,
		'Imagify_Options'                     => 1,
		'Imagify_Requirements'                => 1,
		'Imagify_Settings'                    => 1,
		'Imagify_User'                        => 1,
		'Imagify_Views'                       => 1,
		'Imagify'                             => 1,
		'WP_Async_Request'                    => 1,
		'WP_Background_Process'               => 1,
	);

	if ( isset( $classes[ $class ] ) ) {
		$class = str_replace( '_', '-', strtolower( $class ) );
		include IMAGIFY_CLASSES_PATH . 'class-' . $class . '.php';
		return;
	}

	// Third party classes.
	$classes = array(
		'Imagify_AS3CF_Attachment'                          => 'amazon-s3-and-cloudfront',
		'Imagify_AS3CF'                                     => 'amazon-s3-and-cloudfront',
		'Imagify_Enable_Media_Replace'                      => 'enable-media-replace',
		'Imagify_Formidable_Pro'                            => 'formidable-pro',
		'Imagify_NGG_Attachment'                            => 'nextgen-gallery',
		'Imagify_NGG_DB'                                    => 'nextgen-gallery',
		'Imagify_NGG_Dynamic_Thumbnails_Background_Process' => 'nextgen-gallery',
		'Imagify_NGG_Storage'                               => 'nextgen-gallery',
		'Imagify_NGG'                                       => 'nextgen-gallery',
		'Imagify_Regenerate_Thumbnails'                     => 'regenerate-thumbnails',
		'Imagify_WP_Retina_2x'                              => 'wp-retina-2x',
		'Imagify_WP_Retina_2x_Core'                         => 'wp-retina-2x',
	);

	if ( isset( $classes[ $class ] ) ) {
		$folder = $classes[ $class ];
		$class  = str_replace( '_', '-', strtolower( $class ) );
		include IMAGIFY_3RD_PARTY_PATH . $folder . '/inc/classes/class-' . $class . '.php';
	}
}

/**
 * Simple helper to get some external URLs, like to the documentation.
 *
 * @since  1.6.12
 * @author Grégory Viguier
 *
 * @param  string $target     What we want.
 * @param  array  $query_args An array of query arguments.
 * @return string The URL.
 */
function imagify_get_external_url( $target, $query_args = array() ) {
	$site_url = 'https://imagify.io/';
	$app_url  = 'https://app.imagify.io/#/';

	switch ( $target ) {
		case 'plugin':
			/* translators: Plugin URI of the plugin/theme */
			$url = __( 'https://wordpress.org/plugins/imagify/', 'imagify' );
			break;

		case 'rate':
			$url = 'https://wordpress.org/support/view/plugin-reviews/imagify?rate=5#postform';
			break;

		case 'share-twitter':
			$url = rawurlencode( imagify_get_external_url( 'plugin' ) );
			$url = 'https://twitter.com/intent/tweet?source=webclient&original_referer=' . $url . '&url=' . $url . '&related=imagify&hastags=performance,web,wordpress';
			break;

		case 'share-facebook':
			$url = rawurlencode( imagify_get_external_url( 'plugin' ) );
			$url = 'https://www.facebook.com/sharer/sharer.php?u=' . $url;
			break;

		case 'exif':
			/* translators: URL to a Wikipedia page explaining what EXIF means. */
			$url = __( 'https://en.wikipedia.org/wiki/Exchangeable_image_file_format', 'imagify' );
			break;

		case 'contact':
			$lang  = imagify_get_current_lang_in( 'fr' );
			$paths = array(
				'en' => 'contact',
				'fr' => 'fr/contact',
			);

			$url = $site_url . $paths[ $lang ] . '/';
			break;

		case 'documentation':
			$url = $site_url . 'documentation/';
			break;

		case 'register':
			$partner = imagify_get_partner();

			if ( $partner ) {
				$query_args['partner'] = $partner;
			}

			$url = $app_url . 'register';
			break;

		case 'subscription':
			$url = $app_url . 'subscription';
			break;

		case 'get-api-key':
			$url = $app_url . 'api';
			break;

		case 'payment':
			// Don't remove the trailing slash.
			$url = $app_url . 'plugin/';
			break;

		default:
			return '';
	}

	if ( $query_args ) {
		$url = add_query_arg( $query_args, $url );
	}

	return $url;
}

/**
 * Get the current lang ('fr', 'en', 'de'...), limited to a given list.
 *
 * @since  1.6.14
 * @author Grégory Viguier
 *
 * @param  array $langs An array of langs, like array( 'de', 'es', 'fr', 'it' ).
 * @return string The current lang. Default is 'en'.
 */
function imagify_get_current_lang_in( $langs ) {
	static $locale;

	if ( ! isset( $locale ) ) {
		$locale = imagify_get_locale();
		$locale = explode( '_', strtolower( $locale . '_' ) ); // Trailing underscore is to make sure $locale[1] is set.
	}

	foreach ( (array) $langs as $lang ) {
		if ( $lang === $locale[0] || $lang === $locale[1] ) {
			return $lang;
		}
	}

	return 'en';
}

/**
 * Get the current locale.
 *
 * @since  1.6.14
 * @author Grégory Viguier
 *
 * @return string The current locale.
 */
function imagify_get_locale() {
	$locale = function_exists( 'get_user_locale' ) ? get_user_locale() : get_locale();
	/**
	 * Filter the locale used by Imagify.
	 *
	 * @since  1.6.14
	 * @author Grégory Viguier
	 *
	 * @param string $locale The current locale.
	 */
	return apply_filters( 'imagify_locale', $locale );
}

/**
 * Get the label corresponding to the given optimization label.
 *
 * @since  1.7
 * @author Grégory Viguier
 *
 * @param  int|bool $level  Optimization level (between 0 and 2). False if no level.
 * @param  string   $format Format to display the label. Use %ICON% for the icon and %s for the label.
 * @return string           The label.
 */
function imagify_get_optimization_level_label( $level, $format = '%s' ) {
	if ( ! is_numeric( $level ) ) {
		return '';
	}

	if ( strpos( $format, '%ICON%' ) !== false ) {
		$icon = '<svg width="12" height="12" viewBox="0 0 12 12" xmlns="http://www.w3.org/2000/svg"><g fill="#40B1D0" fill-rule="evenodd">';

		switch ( $level ) {
			case 2:
				$icon .= '<polygon points="11.6054688 11.6054688 8.7890625 11.6054688 8.7890625 0.39453125 11.6054688 0.39453125"/><polygon points="7.39453125 11.6054688 4.60546875 11.6054688 4.60546875 3.89453125 7.39453125 3.89453125"/><polygon points="3.2109375 11.6054688 0.39453125 11.6054688 0.39453125 6 3.2109375 6"/>';
				break;
			case 1:
				$icon .= '<polygon fill="#CCD1D6" points="11.6054688 11.6054688 8.7890625 11.6054688 8.7890625 0.39453125 11.6054688 0.39453125"/><polygon points="7.39453125 11.6054688 4.60546875 11.6054688 4.60546875 3.89453125 7.39453125 3.89453125"/><polygon points="3.2109375 11.6054688 0.39453125 11.6054688 0.39453125 6 3.2109375 6"/>';
				break;
			case 0:
				$icon .= '<polygon fill="#CCD1D6" points="11.6054688 11.6054688 8.7890625 11.6054688 8.7890625 0.39453125 11.6054688 0.39453125"/><polygon fill="#CCD1D6" points="7.39453125 11.6054688 4.60546875 11.6054688 4.60546875 3.89453125 7.39453125 3.89453125"/><polygon points="3.2109375 11.6054688 0.39453125 11.6054688 0.39453125 6 3.2109375 6"/>';
		}

		$icon .= '</g></svg>';

		$format = str_replace( '%ICON%', $icon, $format );
	}

	switch ( $level ) {
		case 2:
			return sprintf( $format, __( 'Ultra', 'imagify' ) );
		case 1:
			return sprintf( $format, __( 'Aggressive', 'imagify' ) );
		case 0:
			return sprintf( $format, __( 'Normal', 'imagify' ) );
	}

	return '';
}

/**
 * `array_merge()` + `array_intersect_key()`.
 *
 * @since  1.7
 * @author Grégory Viguier
 *
 * @param  array $values  The array we're interested in.
 * @param  array $default The array we use as boundaries.
 * @return array
 */
function imagify_merge_intersect( $values, $default ) {
	$values = array_merge( $default, (array) $values );
	return array_intersect_key( $values, $default );
}