Events

class nbm_events {

	public function __construct() {

		if ( is_admin() ) {
			add_action( 'load-post.php',     array( $this, 'init_metabox' ) );
			add_action( 'load-post-new.php', array( $this, 'init_metabox' ) );
		}

	}

	public function init_metabox() {

		add_action( 'add_meta_boxes',        array( $this, 'add_metabox' )         );
		add_action( 'save_post',             array( $this, 'save_metabox' ), 10, 2 );

	}

	public function add_metabox() {

		add_meta_box(
			'nbm_events_mb',
			__( 'EFCC Events', 'nbm-events' ),
			array( $this, 'nbm_events_display_mb' ),
			'events',
			'normal',
			'high'
		);

	}

	public function nbm_events_display_mb( $post ) {

		// Add nonce for security and authentication.
		wp_nonce_field( 'nbm_events_nonce_action', 'nbm_events_nonce' );

		// Retrieve an existing value from the database.
		$nbm_events_reg = get_post_meta( $post->ID, 'nbm_events_reg', true );
		$nbm_events_date = get_post_meta( $post->ID, 'nbm_events_date', true );
		$nbm_events_time = get_post_meta( $post->ID, 'nbm_events_time', true );

		// Set default values.
		if( empty( $nbm_events_reg ) ) $nbm_events_reg = '';
		if( empty( $nbm_events_date ) ) $nbm_events_date = '';
		if( empty( $nbm_events_time ) ) $nbm_events_time = '';

		// Form fields.
		echo '<table class="form-table">';

		echo '	<tr>';
		echo '		<th><label for="nbm_events_reg" class="nbm_events_reg_label">' . __( 'Event Registration', 'nbm-events' ) . '</label></th>';
		echo '		<td>';
		echo '			<input type="text" id="nbm_events_reg" name="nbm_events_reg" class="nbm_events_reg_field" placeholder="' . esc_attr__( 'Registration Link', 'nbm-events' ) . '" value="' . esc_attr( $nbm_events_reg ) . '">';
		echo '		</td>';
		echo '	</tr>';

		echo '	<tr>';
		echo '		<th><label for="nbm_events_date" class="nbm_events_date_label">' . __( 'Date', 'nbm-events' ) . '</label></th>';
		echo '		<td>';
		echo '			<input type="date" id="nbm_events_date" name="nbm_events_date" class="nbm_events_date_field" placeholder="' . esc_attr__( 'Date', 'nbm-events' ) . '" value="' . esc_attr( $nbm_events_date ) . '">';
		echo '		</td>';
		echo '	</tr>';

		echo '	<tr>';
		echo '		<th><label for="nbm_events_time" class="nbm_events_time_label">' . __( 'Time', 'nbm-events' ) . '</label></th>';
		echo '		<td>';
		echo '			<input type="time" id="nbm_events_time" name="nbm_events_time" class="nbm_events_time_field" placeholder="' . esc_attr__( 'Time', 'nbm-events' ) . '" value="' . esc_attr( $nbm_events_time ) . '">';
		echo '		</td>';
		echo '	</tr>';

		echo '</table>';

	}

	public function save_metabox( $post_id, $post ) {

		// Add nonce for security and authentication.
		$nonce_name   = isset( $_POST['nbm_events_nonce'] ) ? $_POST['nbm_events_nonce'] : '';
		$nonce_action = 'nbm_events_nonce_action';

		// Check if a nonce is set.
		if ( ! isset( $nonce_name ) )
			return;

		// Check if a nonce is valid.
		if ( ! wp_verify_nonce( $nonce_name, $nonce_action ) )
			return;

		// Check if the user has permissions to save data.
		if ( ! current_user_can( 'edit_post', $post_id ) )
			return;

		// Check if it's not an autosave.
		if ( wp_is_post_autosave( $post_id ) )
			return;

		// Check if it's not a revision.
		if ( wp_is_post_revision( $post_id ) )
			return;

		// Sanitize user input.
		$nbm_events_new_reg = isset( $_POST[ 'nbm_events_reg' ] ) ? sanitize_text_field( $_POST[ 'nbm_events_reg' ] ) : '';
		$nbm_events_new_date = isset( $_POST[ 'nbm_events_date' ] ) ? sanitize_text_field( $_POST[ 'nbm_events_date' ] ) : '';
		$nbm_events_new_time = isset( $_POST[ 'nbm_events_time' ] ) ? sanitize_text_field( $_POST[ 'nbm_events_time' ] ) : '';

		// Update the meta field in the database.
		update_post_meta( $post_id, 'nbm_events_reg', $nbm_events_new_reg );
		update_post_meta( $post_id, 'nbm_events_date', $nbm_events_new_date );
		update_post_meta( $post_id, 'nbm_events_time', $nbm_events_new_time );

	}

}

new nbm_events;