<?php
/**
 * Ajax function for fixing images
 *
 * @since Acme Fix Images 1.0.0
 *
 * @param null
 * @return string
 *
 */
if ( !function_exists('acme_fix_images_ajax_callback') ) :

    function acme_fix_images_get_image_sizes() {
        global $_wp_additional_image_sizes;

        $sizes = array();
        foreach ( get_intermediate_image_sizes() as $s ) {
            $sizes[$s] = array( 'name' => '', 'width' => '', 'height' => '', 'crop' => FALSE );

            /* Read theme added sizes or fall back to default sizes set in options... */

            $sizes[$s]['name'] = $s;

            if ( isset( $_wp_additional_image_sizes[$s]['width'] ) )
                $sizes[$s]['width'] = intval( $_wp_additional_image_sizes[$s]['width'] );
            else
                $sizes[$s]['width'] = get_option( "{$s}_size_w" );

            if ( isset( $_wp_additional_image_sizes[$s]['height'] ) )
                $sizes[$s]['height'] = intval( $_wp_additional_image_sizes[$s]['height'] );
            else
                $sizes[$s]['height'] = get_option( "{$s}_size_h" );

            if ( isset( $_wp_additional_image_sizes[$s]['crop'] ) )
                $sizes[$s]['crop'] = intval( $_wp_additional_image_sizes[$s]['crop'] );
            else
                $sizes[$s]['crop'] = get_option( "{$s}_crop" );
        }

        return $sizes;
    }
endif;


/**
 * Generate post thumbnail attachment meta data.
 *
 * @since 1.0.0
 *
 * @param int $attachment_id Attachment Id to process.
 * @param string $file Filepath of the Attached image.
 * @return mixed Metadata for attachment.
 */
function acme_fix_images_wp_generate_attachment_metadata( $attachment_id, $file, $thumbnails = NULL ) {
    $attachment = get_post( $attachment_id );

    $metadata = array();
    if ( preg_match('!^image/!', get_post_mime_type( $attachment )) && file_is_displayable_image($file) ) {

        $imagesize = getimagesize( $file );
        $metadata['width'] = $imagesize[0];
        $metadata['height'] = $imagesize[1];
        list($uwidth, $uheight) = wp_constrain_dimensions($metadata['width'], $metadata['height'], 128, 96);
        $metadata['hwstring_small'] = "height='$uheight' width='$uwidth'";

        // Make the file path relative to the upload dir
        $metadata['file'] = _wp_relative_upload_path($file);

        $sizes = acme_fix_images_get_image_sizes();
        $sizes = apply_filters( 'intermediate_image_sizes_advanced', $sizes );

        foreach ($sizes as $size => $size_data ) {

            if( isset( $thumbnails ) && !in_array( $size, $thumbnails )){
                $intermediate_size = image_get_intermediate_size( $attachment_id, $size_data['name'] );
            }
            else{
                $intermediate_size = image_make_intermediate_size( $file, $size_data['width'], $size_data['height'], $size_data['crop'] );
            }

            if ( $intermediate_size ){
                $metadata['sizes'][$size] = $intermediate_size;
            }
        }

        // fetch additional metadata from exif/iptc
        $image_meta = wp_read_image_metadata( $file );
        if ( $image_meta ){
            $metadata['image_meta'] = $image_meta;
        }
    }

    return apply_filters( 'wp_generate_attachment_metadata', $metadata, $attachment_id );
}