186 lines
5.4 KiB
PHP
186 lines
5.4 KiB
PHP
<?php
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/**
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* This file is part of Avatar Privacy.
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*
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* Copyright 2020-2023 Peter Putzer.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* ***
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*
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* @package mundschenk-at/avatar-privacy
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* @license http://www.gnu.org/licenses/gpl-2.0.html
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*/
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namespace Avatar_Privacy\Avatar_Handlers;
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use Avatar_Privacy\Avatar_Handlers\Avatar_Handler;
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use Avatar_Privacy\Data_Storage\Filesystem_Cache;
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use Avatar_Privacy\Tools\Images\Image_File;
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use Avatar_Privacy\Tools\Network\Remote_Image_Service;
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/**
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* Handles retrieving and caching legacy icons (including remote images).
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*
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* @since 2.4.0
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*
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* @author Peter Putzer <giGrthub@mundschenk.at>
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*
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* @phpstan-import-type AvatarArguments from Avatar_Handler
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*/
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class Legacy_Icon_Handler implements Avatar_Handler {
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/**
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* The filesystem cache handler.
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*
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* @var Filesystem_Cache
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*/
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private Filesystem_Cache $file_cache;
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/**
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* The remote image service.
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*
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* @var Remote_Image_Service
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*/
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private Remote_Image_Service $remote_images;
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/**
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* Creates a new instance.
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*
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* @param Filesystem_Cache $file_cache The file cache handler.
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* @param Remote_Image_Service $remote_images The remote image service.
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*/
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public function __construct( Filesystem_Cache $file_cache, Remote_Image_Service $remote_images ) {
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$this->file_cache = $file_cache;
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$this->remote_images = $remote_images;
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}
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/**
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* Retrieves the legacy icon URL.
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*
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* @param string $url The legacy image URL.
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* @param string $hash The hashed URL.
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* @param int $size The size of the avatar image in pixels.
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* @param array $args {
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* An array of arguments.
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*
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* @type string $mimetype Optional. The expected MIME type of the avatar image. Default based on the URL file extension.
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* @type bool $force Optional. Whether to force re-caching of the image file. Default false.
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* }
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*
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* @return string
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*
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* @phpstan-param AvatarArguments $args
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*/
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public function get_url( $url, $hash, $size, array $args ) {
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$defaults = [
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'mimetype' => $this->get_target_mime_type( $url ),
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'force' => false,
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];
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$args = \wp_parse_args( $args, $defaults );
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$filename = "legacy/{$this->get_sub_dir( $hash )}/{$hash}-{$size}." . Image_File::FILE_EXTENSION[ $args['mimetype'] ];
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// Only retrieve new Gravatar if necessary.
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if ( $args['force'] || ! \file_exists( "{$this->file_cache->get_base_dir()}{$filename}" ) ) {
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// Retrieve the legacy icon.
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$icon = $this->remote_images->get_image( $url, $size, $args['mimetype'] );
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// Store it (empty files will fail this check).
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if ( ! $this->file_cache->set( $filename, $icon, $args['force'] ) ) {
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// Something went wrong..
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return $url;
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}
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}
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return $this->file_cache->get_url( $filename );
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}
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/**
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* Retrieves the target MIME type for our resized image.
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*
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* @param string $url The image URL.
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*
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* @return string The target MIME type ('image/png' if the URL extension
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* is not one of our supported image formats).
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*/
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protected function get_target_mime_type( $url ) {
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$mimetype = Image_File::PNG_IMAGE;
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$path = \wp_parse_url( $url, \PHP_URL_PATH );
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$extension = \pathinfo( \is_string( $path ) ? $path : '', \PATHINFO_EXTENSION );
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// Determine MIME type based on the file extension.
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if ( isset( Image_File::CONTENT_TYPE[ $extension ] ) ) {
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$mimetype = Image_File::CONTENT_TYPE[ $extension ];
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}
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return $mimetype;
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}
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/**
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* Calculates the subdirectory from the given identity hash.
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*
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* @param string $identity The identity (mail address) hash.
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*
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* @return string
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*/
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protected function get_sub_dir( $identity ) {
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return \implode( '/', \str_split( \substr( $identity, 0, 2 ) ) );
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}
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/**
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* Caches the image specified by the parameters.
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*
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* @param string $type The image (sub-)type. Ignored.
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* @param string $hash The hashed mail address.
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* @param int $size The requested size in pixels.
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* @param string $subdir The requested sub-directory.
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* @param string $extension The requested file extension.
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*
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* @return bool Returns `true` if successful, `false` otherwise.
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*/
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public function cache_image( $type, $hash, $size, $subdir, $extension ) {
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// Lookup image URL.
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$url = $this->remote_images->get_image_url( $hash );
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// Could not find legacy image URL.
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if ( empty( $url ) ) {
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return false;
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}
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// Prepare arguments.
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$args = [
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'mimetype' => Image_File::CONTENT_TYPE[ $extension ],
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];
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// Try to cache the icon.
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return ! empty( $this->get_url( $url, $hash, $size, $args ) );
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}
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/**
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* Retrieves the name of the cache subdirectory for avatars provided by this
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* handler (e.g. 'gravatar'). Implementations may return an empty string if
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* the actual type can vary.
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*
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* @return string
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*/
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public function get_type() {
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return 'legacy';
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}
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}
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