<?php
/**
 * Plugin Name:       Image Filters
 * Description:       Add Instagram-style CSS filters to images in the block editor.
 * Version:           0.1.0
 * Requires at least: 6.4
 * Requires PHP:      7.4
 * Author:            ksolo
 * License:           GPL-2.0-or-later
 * License URI:       https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain:       image-filters
 * Domain Path:       /languages
 *
 * @package ImageFilters
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

define( 'IMAGE_FILTERS_VERSION', '0.1.0' );
define( 'IMAGE_FILTERS_FILE', __FILE__ );
define( 'IMAGE_FILTERS_DIR', plugin_dir_path( __FILE__ ) );
define( 'IMAGE_FILTERS_URL', plugin_dir_url( __FILE__ ) );

/**
 * Bootstrap the plugin.
 *
 * Registers the Filtered Image block from the build directory. The registered
 * block type is static (its markup is produced by the JS save function).
 *
 * @return void
 */
function image_filters_bootstrap(): void {
    if ( ! function_exists( 'register_block_type' ) ) {
        return;
    }

    register_block_type(
        IMAGE_FILTERS_DIR . 'build',
        array(
            'render_callback' => 'image_filters_render_block',
        )
    );
}
add_action( 'plugins_loaded', 'image_filters_bootstrap' );

/**
 * Render callback for the Filtered Image block.
 *
 * Static blocks render their own markup via save.js. The render_callback
 * is a placeholder for future server-side logic (e.g. dynamic alt text).
 *
 * @param array  $attributes Block attributes.
 * @param string $content    Saved block content.
 * @return string
 */
function image_filters_render_block( array $attributes, string $content = '' ): string {
    return $content;
}

/**
 * Load plugin textdomain for translations.
 *
 * @return void
 */
function image_filters_load_textdomain(): void {
    load_plugin_textdomain( 'image-filters', false, dirname( plugin_basename( __FILE__ ) ) . '/languages' );
}
add_action( 'init', 'image_filters_load_textdomain' );