Phpstan level 5,6

phpstan.neon.dist

@@ -1,5 +1,5 @@
 parameters:
-    level: 4
+    level: 6
     inferPrivatePropertyTypeFromConstructor: true
     checkMissingIterableValueType: false
     stubFiles:

src/Admin/Editor.php

@@ -16,6 +16,9 @@
 
 class Editor {
 
+	/**
+	 * @return void
+	 */
 	public function admin_init() {
 		add_filter( 'wp_insert_post_data', [ $this, 'validate_before_save_cb' ], 10, 2 );
 		add_action( sprintf( 'save_post_%s', Document::TYPE_NAME ), [ $this, 'save_document_cb' ], 10, 2 );
@@ -34,6 +37,10 @@ public function admin_init() {
 
 	/**
 	 * If existing post is edited, verify query string in content is valid graphql
+	 *
+	 * @param array $data   An array of slashed, sanitized, and processed post data.
+	 * @param array $post   An array of sanitized (and slashed) but otherwise unmodified post data.
+	 * @return array
 	 */
 	public function validate_before_save_cb( $data, $post ) {
 		try {
@@ -50,6 +57,12 @@ public function validate_before_save_cb( $data, $post ) {
 		return $data;
 	}
 
+	/**
+	 * On save, validate the form data.
+	 *
+	 * @param int $post_id  post id
+	 * @return void|bool
+	 */
 	public function is_valid_form( $post_id ) {
 		if ( empty( $_POST ) ) {
 			return;
@@ -97,8 +110,12 @@ public function is_valid_form( $post_id ) {
 	}
 
 	/**
-	* When a post is saved, sanitize and store the data.
-	*/
+	 * When a post is saved, sanitize and store the data.
+	 *
+	 * @param int     $post_id Post ID.
+	 * @param \WP_Post $post    Post object.
+	 * @return void
+	 */
 	public function save_document_cb( $post_id, $post ) {
 		if ( ! $this->is_valid_form( $post_id ) ) {
 			AdminErrors::add_message( 'Something is wrong with the form data' );
@@ -119,14 +136,17 @@ public function save_document_cb( $post_id, $post ) {
 			$data    = sanitize_text_field( wp_unslash( $_POST['graphql_query_maxage'] ) );
 			$max_age->save( $post_id, $data );
 		} catch ( SyntaxError $e ) {
-			AdminErrors::add_message( 'Did not save invalid graphql query string. ' . $post['post_content'] );
+			AdminErrors::add_message( 'Did not save invalid graphql query string. ' . $post->post_content );
 		} catch ( RequestError $e ) {
 			AdminErrors::add_message( $e->getMessage() );
 		}
 	}
 
 	/**
 	 * Draw the input field for the post edit
+	 *
+	 * @param \WP_Post $post    Post object.
+	 * @return void
 	 */
 	public static function grant_input_box_cb( $post ) {
 		wp_nonce_field( 'graphql_query_grant', 'savedquery_grant_noncename' );
@@ -167,6 +187,9 @@ public static function grant_input_box_cb( $post ) {
 
 	/**
 	 * Draw the input field for the post edit
+	 *
+	 * @param \WP_Post $post    Post object.
+	 * @return void
 	 */
 	public static function maxage_input_box_cb( $post ) {
 		wp_nonce_field( 'graphql_query_maxage', 'savedquery_maxage_noncename' );
@@ -211,24 +234,42 @@ public function translate_excerpt_text_cb( $string ) {
 
 	/**
 	 * Enable excerpt as the description.
+	 *
+	 * @param string[] $columns An associative array of column headings.
+	 * @return array
 	 */
 	public function add_description_column_to_admin_cb( $columns ) {
 		// Use 'description' as the text the user sees
 		$columns['excerpt'] = __( 'Description', 'wp-graphql-smart-cache' );
 		return $columns;
 	}
 
+	/**
+	 * @param string $column The name of the column to display.
+	 * @param int    $post_id     The current post ID.
+	 * @return void
+	 */
 	public function fill_excerpt_content_cb( $column, $post_id ) {
 		if ( 'excerpt' === $column ) {
 			echo esc_html( get_the_excerpt( $post_id ) );
 		}
 	}
 
+	/**
+	 * @param array $columns An array of sortable columns.
+	 * @return array
+	 */
 	public function make_excerpt_column_sortable_in_admin_cb( $columns ) {
 		$columns['excerpt'] = true;
 		return $columns;
 	}
 
+	/**
+	 * @param array  $settings  Array of editor arguments.
+	 * @param string $editor_id Unique editor identifier, e.g. 'content'. Accepts 'classic-block'
+	 *                          when called from block editor's Classic block.
+	 * @return array
+	 */
 	public function wp_editor_settings( $settings, $editor_id ) {
 		if ( 'content' === $editor_id && Document::TYPE_NAME === get_current_screen()->post_type ) {
 			$settings['tinymce']       = false;

src/Admin/Settings.php

@@ -7,7 +7,11 @@
 
 class Settings {
 
-	// set this to true to see these in wp-admin
+	/**
+	 * Set this to true to see these in wp-admin
+	 *
+	 * @return bool
+	 */
 	public static function show_in_admin() {
 		$display_admin = function_exists( 'get_graphql_setting' ) ? \get_graphql_setting( 'editor_display', false, 'graphql_persisted_queries_section' ) : false;
 		return ( 'on' === $display_admin );
@@ -60,16 +64,28 @@ public static function purge_logging_enabled() {
 		return ( 'on' === $option );
 	}
 
-	// Date/Time of the last time purge all happened through admin.
+	/**
+	 * Date/Time of the last time purge all happened through admin.
+	 *
+	 * @return string|false
+	 */
 	public static function caching_purge_timestamp() {
 		return function_exists( 'get_graphql_setting' ) ? \get_graphql_setting( 'purge_all_timestamp', false, 'graphql_cache_section' ) : false;
 	}
 
+	/**
+	 * The graphql url endpoint with leading slash.
+	 *
+	 * @return string
+	 */
 	public static function graphql_endpoint() {
 		$path = function_exists( 'get_graphql_setting' ) ? \get_graphql_setting( 'graphql_endpoint', 'graphql', 'graphql_general_settings' ) : 'graphql';
 		return '/' . $path;
 	}
 
+	/**
+	 * @return void
+	 */
 	public function init() {
 		// Add to the wp-graphql admin settings page
 		add_action(

src/AdminErrors.php

@@ -14,14 +14,24 @@ class AdminErrors {
 	const TRANSIENT_NAME      = 'graphql_save_graphql_query_validation_error_messages';
 	const MESSAGE_TTL_SECONDS = 60;
 
+	/**
+	 * @return void
+	 */
 	public function init() {
 		add_action( 'admin_notices', [ $this, 'display_validation_messages' ] );
 	}
 
+	/**
+	 * @param string $message
+	 * @return void
+	 */
 	public static function add_message( $message ) {
 		set_transient( self::TRANSIENT_NAME, [ $message ], self::MESSAGE_TTL_SECONDS );
 	}
 
+	/**
+	 * @return void
+	 */
 	public function display_validation_messages() {
 		$screen = get_current_screen();
 		if ( $screen && Document::TYPE_NAME !== $screen->post_type ) {

src/Cache/Collection.php

@@ -14,7 +14,11 @@
 
 class Collection extends Query {
 
-	// initialize the cache collection
+	/**
+	 * Initialize the cache collection
+	 *
+	 * @return void
+	 */
 	public function init() {
 		add_action( 'graphql_return_response', [ $this, 'save_query_mapping_cb' ], 10, 8 );
 		parent::init();

src/Cache/Invalidation.php

@@ -30,13 +30,16 @@ class Invalidation {
 	 * Instantiate the Cache Invalidation class
 	 *
 	 * @param Collection $collection
+	 * @return void
 	 */
 	public function __construct( Collection $collection ) {
 		$this->collection = $collection;
 	}
 
 	/**
 	 * Initialize the actions to listen for
+	 *
+	 * @return void
 	 */
 	public function init() {
 		// @phpcs:ignore
@@ -200,6 +203,8 @@ public function should_track_meta( $meta_key, $meta_value, $object ) {
 	 *
 	 * @param string $key An identifiers for data stored in memory.
 	 * @param string $event The event that caused the purge
+	 *
+	 * @return void
 	 */
 	public function purge( $key, $event = 'undefined event' ) {
 
@@ -223,6 +228,8 @@ public function purge( $key, $event = 'undefined event' ) {
 	 * @param string $id_prefix The type name specific to the id to form the "global ID" that is unique among all types
 	 * @param mixed|string|int $id The node entity identifier
 	 * @param string $event The event that caused the purge
+	 *
+	 * @return void
 	 */
 	public function purge_nodes( $id_prefix, $id, $event = 'unknown event' ) {
 		if ( ! method_exists( Relay::class, 'toGlobalId' ) ) {
@@ -328,6 +335,8 @@ public function on_deleted_post_cb( $post_id, WP_Post $post ) {
 	 * @param int    $term_id  Term ID.
 	 * @param int    $tt_id    Taxonomy term ID.
 	 * @param string $taxonomy Taxonomy name.
+	 *
+	 * @return void
 	 */
 	public function on_created_term_cb( $term_id, $tt_id, $taxonomy ) {
 		$tax_object = get_taxonomy( $taxonomy );
@@ -364,6 +373,8 @@ public function is_taxonomy_tracked( $taxonomy ) {
 	 * @param int    $tt_id        Taxonomy term ID.
 	 * @param string $taxonomy     Taxonomy name.
 	 * @param mixed  $deleted_term Deleted term object.
+	 *
+	 * @return void
 	 */
 	public function on_deleted_term_cb( $term_id, $tt_id, $taxonomy, $deleted_term ) {
 		$tax_object = get_taxonomy( $taxonomy );
@@ -387,6 +398,8 @@ public function on_deleted_term_cb( $term_id, $tt_id, $taxonomy, $deleted_term )
 	 * @param int $object_id ID of the object metadata is for.
 	 * @param string $meta_key Metadata key.
 	 * @param mixed $meta_value Metadata value. Serialized if non-scalar.
+	 *
+	 * @return void
 	 */
 	public function on_updated_term_meta_cb( $meta_id, $object_id, $meta_key, $meta_value ) {
 		if ( empty( $term = get_term( $object_id ) ) || ! $term instanceof WP_Term ) {
@@ -503,6 +516,8 @@ public function on_added_term_relationship_cb( $object_id, $tt_id, $taxonomy ) {
 	 * @param string  $new_status The new status of the post
 	 * @param string  $old_status The old status of the post
 	 * @param WP_Post $post       The post being updated
+	 *
+	 * @return void
 	 */
 	public function on_transition_post_status_cb( $new_status, $old_status, WP_Post $post ) {
 
@@ -612,6 +627,8 @@ function ( $term ) use ( $post ) {
 	 *
 	 * @param int     $user_id       User ID.
 	 * @param WP_User $old_user_data Object containing user's data prior to update.
+	 *
+	 * @return void
 	 */
 	public function on_user_profile_update_cb( $user_id, $old_user_data ) {
 		// Delete the cached results associated with this key
@@ -625,6 +642,8 @@ public function on_user_profile_update_cb( $user_id, $old_user_data ) {
 	 * @param int    $object_id   ID of the object metadata is for.
 	 * @param string $meta_key    Metadata key.
 	 * @param mixed  $_meta_value Metadata value. Serialized if non-scalar.
+	 *
+	 * @return void
 	 */
 	public function on_user_meta_change_cb( $meta_id, $object_id, $meta_key, $_meta_value ) {
 		$user = get_user_by( 'id', $object_id );
@@ -642,10 +661,10 @@ public function on_user_meta_change_cb( $meta_id, $object_id, $meta_key, $_meta_
 	}
 
 	/**
-	 *
 	 * @param int      $deleted_id       ID of the deleted user.
 	 * @param int|null $reassign_id ID of the user to reassign posts and links to.
 	 *                           Default null, for no reassignment.
+	 * @return void
 	 */
 	public function on_user_deleted_cb( $deleted_id, $reassign_id ) {
 		global $wpdb;
@@ -679,6 +698,8 @@ public function on_user_deleted_cb( $deleted_id, $reassign_id ) {
 	 * @param mixed  $meta_value Metadata value. This will be a PHP-serialized string
 	 *                           representation of the value if the value is an array, an object,
 	 *                           or itself a PHP-serialized string.
+	 *
+	 * @return void
 	 */
 	public function on_postmeta_change_cb( $meta_id, $post_id, $meta_key, $meta_value ) {
 
@@ -856,6 +877,8 @@ public function on_updated_menu_meta_cb( $meta_id, $object_id, $meta_key, $meta_
 	 * @param mixed  $meta_value Metadata value. This will be a PHP-serialized string
 	 *                           representation of the value if the value is an array, an object,
 	 *                           or itself a PHP-serialized string.
+	 *
+	 * @return void
 	 */
 	public function on_menu_item_change_cb( $meta_id, $post_id, $meta_key, $meta_value ) {
 
@@ -901,11 +924,18 @@ public function on_add_attachment_cb( $attachment_id ) {
 	 * @param string $image      Unused.
 	 * @param string $mime_type  Unused.
 	 * @param int    $post_id    Post ID.
+	 *
+	 * @return void
 	 */
 	public function on_save_image_file_cb( $dummy, $filename, $image, $mime_type, $post_id ) {
 		$this->on_edit_attachment_cb( $post_id );
 	}
 
+	/**
+	 * @param int $attachment_id Attachment ID.
+	 *
+	 * @return void
+	 */
 	public function on_edit_attachment_cb( $attachment_id ) {
 		$attachment = get_post( $attachment_id );
 
@@ -919,7 +949,7 @@ public function on_edit_attachment_cb( $attachment_id ) {
 	/**
 	 * Handle purging when attachment is deleted
 	 *
-	 * @param $attachment_id
+	 * @param int $attachment_id Attachment ID.
 	 *
 	 * @return void
 	 */
@@ -939,6 +969,8 @@ public function on_delete_attachment( $attachment_id ) {
 	 * @param int|string $new_status The new comment status.
 	 * @param int|string $old_status The old comment status.
 	 * @param WP_Comment $comment    Comment object.
+	 *
+	 * @return void
 	 */
 	public function on_comment_transition_cb( $new_status, $old_status, $comment ) {
 		// Only evict cache if transitioning to or from 'approved'
@@ -953,6 +985,8 @@ public function on_comment_transition_cb( $new_status, $old_status, $comment ) {
 	 *
 	 * @param int        $comment_id The comment ID.
 	 * @param WP_Comment $comment    Comment object.
+	 *
+	 * @return void
 	 */
 	public function on_insert_comment_cb( $comment_id, $comment ) {
 		if ( property_exists( $comment, 'comment_approved' ) && '1' === $comment->comment_approved ) {

src/Cache/Query.php

@@ -14,11 +14,18 @@ class Query {
 
 	const GROUP_NAME = 'gql_cache';
 
-	// The storage object for the actual system of choice transient, database, object, memory, etc
+	/**
+	 * The storage object for the actual system of choice transient, database, object, memory, etc
+	 *
+	 * @var object
+	 **/
 	public static $storage = null;
 
+	/**
+	 * @return void
+	 */
 	public function init() {
-		if ( ! self::$storage ) {
+		if ( null === self::$storage ) {
 			self::$storage = apply_filters(
 				'graphql_cache_storage_object', //phpcs:ignore
 				wp_using_ext_object_cache() ? new WpCache( self::GROUP_NAME ) : new Transient( self::GROUP_NAME )