class-imagify.php

<?php

/**
 * Imagify PHP Class
 *
 * @author WP Media <contact@wp-media.me>
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

namespace Imagify;

class Optimizer {
    /**
     * The Imagify API endpoint
     */
    const API_ENDPOINT = 'https://app.imagify.io/api';

    /**
     * The Imagify API key
     */
    private $api_key = '';

    /**
     * HTTP headers
     */
    private $headers = array();

    /**
     * The constructor
     *
     * @return void
     */
    public function __construct( $api_key = '' ) {
        if ( ! empty( $api_key ) ) {
            $this->api_key = $api_key;
        }

        // Check if php-curl is enabled
        if ( ! function_exists( 'curl_init' ) || ! function_exists( 'curl_exec' ) ) {
            die('cURL isn\'t installed on the server.');
        }

        $this->headers['Authorization'] = 'Authorization: token ' . $this->api_key;
    }

    /**
     * Optimize an image from its binary content.
     *
     * @param  string $image   Image path
     * @param  array  $options (optional) Optimization options
     *                         array(
     *                             'level'     => string ('normal' | 'aggressive' (default) | 'ultra'),
     *                             'resize'    => array(
     *                                 'width'   => int,
     *                                 'height'  => int,
     *                                 'percent' => int
     *                             ),
     *                             'keep_exif' => bool (default: false)
     *                         ) 
     * @return array
     */
    public function optimize( $image, $options = array() ) {
        if ( !is_string($image) || !is_file($image) ) {
            return (object) array('success' => false, 'message' => 'Image incorrect!');
        } else if ( !is_readable($image) ) {
            return (object) array('success' => false, 'message' => 'Image not readable!');
        }

        $default = array(
            'level'     => 'aggressive',
            'resize'    => array(),
            'keep_exif' => false,
            'timeout'   => 45 
        );

        $options = array_merge( $default, $options );
        
        $data = array(
            'image' => curl_file_create( $image ),
            'data'  => json_encode(
                array(
                    'aggressive' => ( 'aggressive' === $options['level'] ) ? true : false,
                    'ultra'      => ( 'ultra' === $options['level'] ) ? true : false,
                    'resize'     => $options['resize'],
                    'keep_exif'  => $options['keep_exif'],
                ) 
            )
        );

        return $this->request( '/upload/', array( 
                'post_data' => $data,
                'timeout'   => $options["timeout"]
            ) 
        );
    }

    /**
     * Make an HTTP call using curl.
     *
     * @param  string $url       The URL to call
     * @param  array  $options   Optional request options
     * @return object
     */
    private function request( $url, $options = array() ) {
        $default = array( 
            'method'    => 'POST', 
            'post_data' => null
        );
        $options = array_merge( $default, $options );

        try {
            $ch     = curl_init();
            $is_ssl = ( isset( $_SERVER['HTTPS'] ) && ( 'on' == strtolower( $_SERVER['HTTPS'] ) || '1' == $_SERVER['HTTPS'] ) ) || ( isset( $_SERVER['SERVER_PORT'] ) && ( '443' == $_SERVER['SERVER_PORT'] ) );

            if ( 'POST' === $options['method'] ) {
                curl_setopt( $ch, CURLOPT_POST, true );
                curl_setopt( $ch, CURLOPT_POSTFIELDS, $options['post_data'] );
            }

            curl_setopt( $ch, CURLOPT_URL, self::API_ENDPOINT . $url );
            curl_setopt( $ch, CURLOPT_USERAGENT, 'Imagify PHP Class');
            curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
            curl_setopt( $ch, CURLOPT_HTTPHEADER, $this->headers );
            curl_setopt( $ch, CURLOPT_TIMEOUT, $options['timeout'] );
            @curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true );
            curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, $is_ssl );
            
            $response  = json_decode( curl_exec( $ch ) );
            $error     = curl_error( $ch );
            $http_code = curl_getinfo( $ch, CURLINFO_HTTP_CODE );

            curl_close( $ch );

        } catch( \Exception $e ) {
            return (object) array('success' => false, 'message' => 'Unknown error occurred');
        }

        if ( 200 !== $http_code && isset( $response->code, $response->detail ) ) {
            return $response;
        } elseif ( 200 !== $http_code ) {
            return (object) array('success' => false, 'message' => 'Unknown error occurred');
        }

        return $response;
    }
}