<?php

/**
* Title		: Aqua Resizer
* Description	: Resizes WordPress images on the fly
* Version	: 1.1.6
* Author	: Syamil MJ
* Author URI	: http://aquagraphite.com
* License	: WTFPL - http://sam.zoy.org/wtfpl/
* Documentation	: https://github.com/sy4mil/Aqua-Resizer/
*
* @param	string $url - (required) must be uploaded using wp media uploader
* @param	int $width - (required)
* @param	int $height - (optional)
* @param	bool $crop - (optional) default to soft crop
* @param	bool $single - (optional) returns an array if false
* @uses		wp_upload_dir()
* @uses		image_resize_dimensions() | image_resize()
* @uses		wp_get_image_editor()
*
* @return str|array
*/

if ( !function_exists( 'aq_resize' ) ) {
    function aq_resize( $url, $width, $height = null, $crop = null, $single = true ) {

        //validate inputs
        if(!$url OR !$width ) return false;

        //define upload path & dir
        $upload_info = wp_upload_dir();
        $upload_dir = $upload_info['basedir'];
        $upload_url = $upload_info['baseurl'];

        //check if $img_url is local
        if(strpos( $url, $upload_url ) === false) return false;

        //define path of image
        $rel_path = str_replace( $upload_url, '', $url);
        $img_path = $upload_dir . $rel_path;

        //check if img path exists, and is an image indeed
        if( !file_exists($img_path) OR !getimagesize($img_path) ) return false;

        //get image info
        $info = pathinfo($img_path);
        $ext = $info['extension'];
        list($orig_w,$orig_h) = getimagesize($img_path);

        //get image size after cropping
        $dims = image_resize_dimensions($orig_w, $orig_h, $width, $height, $crop);
        $dst_w = $dims[4];
        $dst_h = $dims[5];

        //use this to check if cropped image already exists, so we can return that instead
        $suffix = "{$dst_w}x{$dst_h}";
        $dst_rel_path = str_replace( '.'.$ext, '', $rel_path);
        $destfilename = "{$upload_dir}{$dst_rel_path}-{$suffix}.{$ext}";

        if(!$dst_h) {
            //can't resize, so return original url
            $img_url = $url;
            $dst_w = $orig_w;
            $dst_h = $orig_h;
        }
        //else check if cache exists
        elseif(file_exists($destfilename) && getimagesize($destfilename)) {
            $img_url = "{$upload_url}{$dst_rel_path}-{$suffix}.{$ext}";
        }
        //else, we resize the image and return the new resized image url
        else {

            // Note: This pre-3.5 fallback check will edited out in subsequent version
            if(function_exists('wp_get_image_editor')) {

                $editor = wp_get_image_editor($img_path);

                if ( is_wp_error( $editor ) || is_wp_error( $editor->resize( $width, $height, $crop ) ) )
                    return false;

                $resized_file = $editor->save();

                if(!is_wp_error($resized_file)) {
                    $resized_rel_path = str_replace( $upload_dir, '', $resized_file['path']);
                    $img_url = $upload_url . $resized_rel_path;
                } else {
                    return false;
                }

            }
        }

        //return the output
        if($single) {
            //str return
            $image = $img_url;
        } else {
            //array return
            $image = array (
                0 => $img_url,
                1 => $dst_w,
                2 => $dst_h
            );
        }

        return $image;
    }
}