feat: prima versione del plugin, blocco e shortcode con iframe stampato lato server

includes/block.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * The editor block. Dynamic: the markup is produced by PHP at render time, so
+ * the events are always the ones of today and never a copy frozen in the post
+ * content.
+ *
+ * @package PiazzaInFesta
+ */
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * Registers the block from its block.json.
+ *
+ * @return void
+ */
+function pinfesta_register_block() {
+	$type = register_block_type(
+		PINFESTA_DIR . 'blocks/eventi',
+		array( 'render_callback' => 'pinfesta_render_block' )
+	);
+
+	// The editor strings live in JavaScript, so they need their own JSON
+	// catalogue. The handle is read back from the registered block instead of
+	// being guessed: WordPress builds it from block.json and it can change.
+	if ( $type && ! empty( $type->editor_script_handles ) ) {
+		foreach ( $type->editor_script_handles as $handle ) {
+			wp_set_script_translations( $handle, 'piazza-in-festa', PINFESTA_DIR . 'languages' );
+		}
+	}
+}
+add_action( 'init', 'pinfesta_register_block' );
+
+/**
+ * Renders the block on the front end and in the editor preview.
+ *
+ * @param array $attributes Block attributes.
+ * @return string HTML.
+ */
+function pinfesta_render_block( $attributes ) {
+	$args = wp_parse_args( (array) $attributes, pinfesta_defaults() );
+
+	$html = pinfesta_render_iframe( $args );
+
+	if ( '' === $html ) {
+		return '';
+	}
+
+	$wrapper = get_block_wrapper_attributes();
+
+	return '<div' . ( '' === $wrapper ? '' : ' ' . $wrapper ) . '>' . $html . '</div>';
+}