acf-image-hotspots.php

<?php

/*
Plugin Name: Advanced Custom Fields: Image Hotspots Field
Plugin URI: PLUGIN_URL
Description: Adds a field to capture coordinates relative to specified images
Version: 0.1.1
Author: Andrew Rockwell
Author URI: http://www.rockwellgrowth.com
License: GPLv2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
*/

// exit if accessed directly
if( ! defined( 'ABSPATH' ) ) exit;

// check if class already exists
if( !class_exists('acf_plugin_image_mapping') ) :

class acf_plugin_image_mapping {

    // Declare the property to avoid dynamic property issues
    private $settings;

    /*
    *  __construct
    *
    *  This function will setup the class functionality
    *
    *  @type    function
    *  @date    17/02/2016
    *  @since   1.0.0
    *
    *  @param   n/a
    *  @return  n/a
    */

    function __construct() {

        // vars
        $this->settings = array(
            'version'    => '1.0.0',
            'url'        => plugin_dir_url( __FILE__ ),
            'path'       => plugin_dir_path( __FILE__ )
        );

        // set text domain
        // https://codex.wordpress.org/Function_Reference/load_plugin_textdomain
        load_plugin_textdomain( 'acf-image_mapping', false, plugin_basename( dirname( __FILE__ ) ) . '/lang' );

        // include field
        add_action('acf/include_field_types',  array($this, 'include_field_types')); // v5
        add_action('acf/register_fields',      array($this, 'include_field_types')); // v4

    }

    /*
    *  include_field_types
    *
    *  This function will include the field type class
    *
    *  @type    function
    *  @date    17/02/2016
    *  @since   1.0.0
    *
    *  @param   $version (int) major ACF version. Defaults to false
    *  @return  n/a
    */

    function include_field_types( $version = false ) {

        // support empty $version
        if( !$version ) $version = 4;

        if ( 5 != $version ) {
            add_action( 'admin_notices', array( $this, 'not_compatible' ) );
            return;
        }

        // include
        include_once('fields/acf-image_hotspots-v' . $version . '.php');

    }

    function not_compatible() {
        ?>
            <div class="notice notice-error is-dismissible">
            <p><?php _e( 'ACF: Image Hotspots Field is only compatible for ACF v5+!', 'sample-text-domain' ); ?></p>
            </div>
        <?php
    }

}

// initialize
new acf_plugin_image_mapping();

// class_exists check
endif;

?>