Noptin_Form::get_data_by( string $field, string|int $value )

	public function get_data_by( $field, $value ) {

		// 'ID' is an alias of 'id'...
		if ( 'id' === strtolower( $field ) ) {

			// Make sure the value is numeric to avoid casting objects, for example, to int 1.
			if ( ! is_numeric( $value ) ) {
				return false;
			}

			// Ensure this is a valid form id.
			$value = intval( $value );
			if ( $value < 1 ) {
				return false;
			}
		} else {
			return false;
		}

		// Maybe fetch from cache.
		$form = wp_cache_get( $value, 'noptin_forms' );
		if ( $form ) {
			return $form;
		}

		// Fetch the post object from the db.
		$post = get_post( $value );
		if ( ! $post || 'noptin-form' !== $post->post_type ) {
			return false;
		}

		// Init the form.
		$form = array(
			'optinName'   => $post->post_title,
			'optinStatus' => ( 'draft' !== $post->post_status ),
			'id'          => $post->ID,
			'optinHTML'   => $post->post_content,
			'optinType'   => get_post_meta( $post->ID, '_noptin_optin_type', true ),
		);

		$state = get_post_meta( $post->ID, '_noptin_state', true );
		if ( ! is_array( $state ) ) {
			$state = array();
		}

		$form = array_merge( $state, $form );

		// Update the cache with out data.
		wp_cache_add( $post->ID, $form, 'noptin_forms' );

		return $this->sanitize_form_data( $form );
	}