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<?php

function yanco_StringIsNullOrEmpty( $string ) {
    return ( !isset( $string ) || trim( $string ) === '');
}

/**
 * Advanced Custom Fields Get Image Tag From Image Object
 * Dependencies: functions/function-common.php
 * Usage:
 * <code>
 * $args = array(
 *     'class_name' => '',                        // Output with class
 *     'image_size' => '',                   // Name of the image Object
 *     'only_return_url' => true/false,      // Output the URL
 *     'is_option_field' => true/false,      // Look for an option field
 *     'is_sub_field' => true/false,         // Look for a sub_field
 *     'search_post_id' => $search_post_id   // Should we look for the field in a specific post
 * );
 * 
 * yanco_get_acf_imagetag_from_image_object('acf_image_object_fieldname', $args);
 * </code>
 *
 *
 */

$debug_output_errors = true; // Output debug information?

function yanco_get_acf_imagetag_from_image_object( $acf_image_object_fieldname, $args = array() )
{
    $image_width = '';
    $image_height = '';
    $image_object = '';
    $image_result = '';

    $class_name = '';
    $image_size = '';
    $only_return_url = false;
    $is_option_field = false;
    $is_sub_field = false;
    $search_post_id = null;

    if( array_key_exists( 'class_name', $args ) )
        $class_name = $args['class_name'];

    if( array_key_exists( 'image_size', $args ) )
        $image_size = $args['image_size'];

    if( array_key_exists( 'only_return_url', $args ) )
        $only_return_url = $args['only_return_url'];

    if( array_key_exists( 'is_option_field', $args ) )
        $is_option_field = $args['is_option_field'];

    if( array_key_exists( 'is_sub_field', $args ) )
        $is_sub_field = $args['is_sub_field'];

    if( array_key_exists( 'search_post_id', $args ) )
        $search_post_id = $args['search_post_id'];

    if( yanco_StringIsNullOrEmpty( $acf_image_object_fieldname ) )
    {
        if( $debug_output_errors == true )
            return _e('Error: field name is not set', 'custom_theme');
        else
            return;
    }

    if($is_option_field)
    {
        if($is_sub_field)
        {
            if(!get_sub_field($acf_image_object_fieldname, 'option'))
            {
                if( $debug_output_errors == true )
                    return _e('Error: OPTION sub_field named "'. $acf_image_object_fieldname . '" is not set', 'custom_theme');
                else
                    return;
            }

            $image_object = get_sub_field($acf_image_object_fieldname, 'option');
        }
        else
        {
            if(!get_field($acf_image_object_fieldname, 'option'))
            {
                if( $debug_output_errors == true )
                    return _e('Error: OPTION field named "'. $acf_image_object_fieldname . '" is not set', 'custom_theme');
                else
                    return;
            }

            $image_object = get_field($acf_image_object_fieldname, 'option');
        }
    }
    else
    {
        if($search_post_id != null)
        {
            if($is_sub_field)
            {
                if( !get_sub_field($image_object_fieldname, $search_post_id) )
                {
                    if( $debug_output_errors == true )
                        return _e('Error: sub_field named "'. $image_object_fieldname . '" in post_id: '.$search_post_id.' is not set', 'custom_theme');
                    else
                        return;
                }

                $image_object = get_sub_field($image_object_fieldname, $search_post_id);
            }
            else
            {
                if( !get_field($image_object_fieldname, $search_post_id) )
                {
                    if( $debug_output_errors == true )
                        return _e('Error: field named "'. $image_object_fieldname . '" in post_id: '.$search_post_id.' is not set', 'custom_theme');
                    else
                        return;
                }

                $image_object = get_field($image_object_fieldname, $search_post_id);
            }
        }
        else
        {
            if($is_sub_field)
            {
                if( !get_sub_field($image_object_fieldname) )
                {
                    if( $debug_output_errors == true )
                        return _e('Error: sub_field named "'. $image_object_fieldname . '" is not set', 'custom_theme');
                    else
                        return;
                }

                $image_object = get_sub_field($image_object_fieldname);
            }
            else
            {
                if( !get_field($image_object_fieldname) )
                {
                    if( $debug_output_errors == true )
                        return _e('Error: field named "'. $image_object_fieldname . '" is not set', 'custom_theme');
                    else
                        return;
                }

                $image_object = get_field($image_object_fieldname);
            }
        }
    }

    if( !empty( $image_object ) )
    {
        if( !yanco_StringIsNullOrEmpty( $image_size ) )
        {
            $image_size = $image_object['sizes'][ $image_size ];
            $image_width = $image_object['sizes'][ $image_size . '-width' ];
            $image_height = $image_object['sizes'][ $image_size . '-height' ];

            if( !$only_return_url )
            {
                if( !yanco_StringIsNullOrEmpty($class_name) )
                {
                    return '<img src="' .$image_size . '" class="'.$class_name.'" title="' . $image_object['title'] . '" alt="' . $image_object['alt'] . '" width="' . $image_width . '" height="' . $image_height . '" />';
                }
                else
                {
                    return '<img src="' .$image_size . '" title="' . $image_object['title'] . '" alt="' . $image_object['alt'] . '" width="' . $image_width . '" height="' . $image_height . '" />';    
                }
                
            }
            else
                return $image_size;
        }
        else
        {
            if( !$only_return_url )
            {
                if( !yanco_StringIsNullOrEmpty($class_name) )
                {
                    return '<img src="' . $image_object['url'] . '" class="'.$class_name.'" title="' . $image_object['title'] . '" alt="' . $image_object['alt'] . '">';
                }
                else
                {
                    return '<img src="' . $image_object['url'] . '" title="' . $image_object['title'] . '" alt="' . $image_object['alt'] . '">';
                }
                
            }
            else
                return $image_object['url'];
        }
    }
    else
    {
        if( $debug_output_errors == true )
            return _e('Error: image_object is not set', 'custom_theme');
        else
            return;
    }
}

?>