class JsonapiHooks

class JsonapiHooks {
    
    /**
     * Implements hook_help().
     */
    public function help($route_name, RouteMatchInterface $route_match) {
        switch ($route_name) {
            case 'help.page.jsonapi':
                $output = '<h2>' . t('About') . '</h2>';
                $output .= '<p>' . t('The JSON:API module is a fully compliant implementation of the <a href=":spec">JSON:API Specification</a>. By following shared conventions, you can increase productivity, take advantage of generalized tooling, and focus on what matters: your application. Clients built around JSON:API are able to take advantage of features like efficient response caching, which can sometimes eliminate network requests entirely. For more information, see the <a href=":docs">online documentation for the JSON:API module</a>.', [
                    ':spec' => 'https://jsonapi.org',
                    ':docs' => 'https://www.drupal.org/docs/8/modules/json-api',
                ]) . '</p>';
                $output .= '<dl>';
                $output .= '<dt>' . t('General') . '</dt>';
                $output .= '<dd>' . t('JSON:API is a particular implementation of REST that provides conventions for resource relationships, collections, filters, pagination, and sorting. These conventions help developers build clients faster and encourages reuse of code.') . '</dd>';
                $output .= '<dd>' . t('The <a href=":jsonapi-docs">JSON:API</a> and <a href=":rest-docs">RESTful Web Services</a> modules serve similar purposes. <a href=":comparison">Read the comparison of the RESTFul Web Services and JSON:API modules</a> to determine the best choice for your site.', [
                    ':jsonapi-docs' => 'https://www.drupal.org/docs/8/modules/json-api',
                    ':rest-docs' => 'https://www.drupal.org/docs/8/core/modules/rest',
                    ':comparison' => 'https://www.drupal.org/docs/8/modules/jsonapi/jsonapi-vs-cores-rest-module',
                ]) . '</dd>';
                $output .= '<dd>' . t('Some multilingual features currently do not work well with JSON:API. See the <a href=":jsonapi-docs">JSON:API multilingual support documentation</a> for more information on the current status of multilingual support.', [
                    ':jsonapi-docs' => 'https://www.drupal.org/docs/8/modules/jsonapi/translations',
                ]) . '</dd>';
                $output .= '<dd>' . t('Revision support is currently read-only and only for the "Content" and "Media" entity types in JSON:API. See the <a href=":jsonapi-docs">JSON:API revision support documentation</a> for more information on the current status of revision support.', [
                    ':jsonapi-docs' => 'https://www.drupal.org/docs/8/modules/jsonapi/revisions',
                ]) . '</dd>';
                $output .= '</dl>';
                return $output;
        }
        return NULL;
    }
    
    /**
     * Implements hook_modules_installed().
     */
    public function modulesInstalled($modules) {
        $potential_conflicts = [
            'content_translation',
            'config_translation',
            'language',
        ];
        if (!empty(array_intersect($modules, $potential_conflicts))) {
            \Drupal::messenger()->addWarning(t('Some multilingual features currently do not work well with JSON:API. See the <a href=":jsonapi-docs">JSON:API multilingual support documentation</a> for more information on the current status of multilingual support.', [
                ':jsonapi-docs' => 'https://www.drupal.org/docs/8/modules/jsonapi/translations',
            ]));
        }
    }
    
    /**
     * Implements hook_entity_bundle_create().
     */
    public function entityBundleCreate() {
        Routes::rebuild();
    }
    
    /**
     * Implements hook_entity_bundle_delete().
     */
    public function entityBundleDelete() {
        Routes::rebuild();
    }
    
    /**
     * Implements hook_entity_create().
     */
    public function entityCreate(EntityInterface $entity) {
        if (in_array($entity->getEntityTypeId(), [
            'field_storage_config',
            'field_config',
        ])) {
            // @todo Only do this when relationship fields are updated, not just any field.
            Routes::rebuild();
        }
    }
    
    /**
     * Implements hook_entity_delete().
     */
    public function entityDelete(EntityInterface $entity) {
        if (in_array($entity->getEntityTypeId(), [
            'field_storage_config',
            'field_config',
        ])) {
            // @todo Only do this when relationship fields are updated, not just any field.
            Routes::rebuild();
        }
    }
    
    /**
     * Implements hook_jsonapi_entity_filter_access().
     */
    public function jsonapiEntityFilterAccess(EntityTypeInterface $entity_type, AccountInterface $account) {
        // All core entity types and most or all contrib entity types allow users
        // with the entity type's administrative permission to view all of the
        // entities, so enable similarly permissive filtering to those users as well.
        // A contrib module may override this decision by returning
        // AccessResult::forbidden() from its implementation of this hook.
        if ($admin_permission = $entity_type->getAdminPermission()) {
            return [
                JSONAPI_FILTER_AMONG_ALL => AccessResult::allowedIfHasPermission($account, $admin_permission),
            ];
        }
    }
    
    /**
     * Implements hook_jsonapi_ENTITY_TYPE_filter_access() for 'block_content'.
     */
    public function jsonapiBlockContentFilterAccess(EntityTypeInterface $entity_type, AccountInterface $account) {
        // @see \Drupal\block_content\BlockContentAccessControlHandler::checkAccess()
        // \Drupal\jsonapi\Access\TemporaryQueryGuard adds the condition for
        // (isReusable()), so this does not have to.
        return [
            JSONAPI_FILTER_AMONG_ALL => AccessResult::allowedIfHasPermission($account, 'access block library'),
            JSONAPI_FILTER_AMONG_PUBLISHED => AccessResult::allowed(),
        ];
    }
    
    /**
     * Implements hook_jsonapi_ENTITY_TYPE_filter_access() for 'comment'.
     */
    public function jsonapiCommentFilterAccess(EntityTypeInterface $entity_type, AccountInterface $account) {
        // @see \Drupal\comment\CommentAccessControlHandler::checkAccess()
        // \Drupal\jsonapi\Access\TemporaryQueryGuard adds the condition for
        // (access to the commented entity), so this does not have to.
        return [
            JSONAPI_FILTER_AMONG_ALL => AccessResult::allowedIfHasPermission($account, 'administer comments'),
            JSONAPI_FILTER_AMONG_PUBLISHED => AccessResult::allowedIfHasPermission($account, 'access comments'),
        ];
    }
    
    /**
     * Implements hook_jsonapi_ENTITY_TYPE_filter_access() for 'entity_test'.
     */
    public function jsonapiEntityTestFilterAccess(EntityTypeInterface $entity_type, AccountInterface $account) {
        // @see \Drupal\entity_test\EntityTestAccessControlHandler::checkAccess()
        return [
            JSONAPI_FILTER_AMONG_ALL => AccessResult::allowedIfHasPermission($account, 'view test entity'),
        ];
    }
    
    /**
     * Implements hook_jsonapi_ENTITY_TYPE_filter_access() for 'file'.
     */
    public function jsonapiFileFilterAccess(EntityTypeInterface $entity_type, AccountInterface $account) {
        // @see \Drupal\file\FileAccessControlHandler::checkAccess()
        // \Drupal\jsonapi\Access\TemporaryQueryGuard adds the condition for
        // (public OR owner), so this does not have to.
        return [
            JSONAPI_FILTER_AMONG_ALL => AccessResult::allowedIfHasPermission($account, 'access content'),
        ];
    }
    
    /**
     * Implements hook_jsonapi_ENTITY_TYPE_filter_access() for 'media'.
     */
    public function jsonapiMediaFilterAccess(EntityTypeInterface $entity_type, AccountInterface $account) {
        // @see \Drupal\media\MediaAccessControlHandler::checkAccess()
        return [
            JSONAPI_FILTER_AMONG_PUBLISHED => AccessResult::allowedIfHasPermission($account, 'view media'),
        ];
    }
    
    /**
     * Implements hook_jsonapi_ENTITY_TYPE_filter_access() for 'node'.
     */
    public function jsonapiNodeFilterAccess(EntityTypeInterface $entity_type, AccountInterface $account) {
        // @see \Drupal\node\NodeAccessControlHandler::access()
        if ($account->hasPermission('bypass node access')) {
            return [
                JSONAPI_FILTER_AMONG_ALL => AccessResult::allowed()->cachePerPermissions(),
            ];
        }
        if (!$account->hasPermission('access content')) {
            $forbidden = AccessResult::forbidden("The 'access content' permission is required.")->cachePerPermissions();
            return [
                JSONAPI_FILTER_AMONG_ALL => $forbidden,
                JSONAPI_FILTER_AMONG_OWN => $forbidden,
                JSONAPI_FILTER_AMONG_PUBLISHED => $forbidden,
                // For legacy reasons, the Node entity type has a "status" key, so forbid
                // this subset as well, even though it has no semantic meaning.
JSONAPI_FILTER_AMONG_ENABLED => $forbidden,
            ];
        }
        return [
            // @see \Drupal\node\NodeAccessControlHandler::checkAccess()
JSONAPI_FILTER_AMONG_OWN => AccessResult::allowedIfHasPermission($account, 'view own unpublished content'),
            // @see \Drupal\node\NodeGrantDatabaseStorage::access()
            // Note that:
            // - This is just for the default grant. Other node access conditions are
            //   added via the 'node_access' query tag.
            // - Permissions were checked earlier in this function, so we must vary the
            //   cache by them.
JSONAPI_FILTER_AMONG_PUBLISHED => AccessResult::allowed()->cachePerPermissions(),
        ];
    }
    
    /**
     * Implements hook_jsonapi_ENTITY_TYPE_filter_access() for 'shortcut'.
     */
    public function jsonapiShortcutFilterAccess(EntityTypeInterface $entity_type, AccountInterface $account) {
        // @see \Drupal\shortcut\ShortcutAccessControlHandler::checkAccess()
        // \Drupal\jsonapi\Access\TemporaryQueryGuard adds the condition for
        // (shortcut_set = $shortcut_set_storage->getDisplayedToUser($current_user)),
        // so this does not have to.
        return [
            JSONAPI_FILTER_AMONG_ALL => AccessResult::allowedIfHasPermission($account, 'administer shortcuts')->orIf(AccessResult::allowedIfHasPermissions($account, [
                'access shortcuts',
                'customize shortcut links',
            ])),
        ];
    }
    
    /**
     * Implements hook_jsonapi_ENTITY_TYPE_filter_access() for 'taxonomy_term'.
     */
    public function jsonapiTaxonomyTermFilterAccess(EntityTypeInterface $entity_type, AccountInterface $account) {
        // @see \Drupal\taxonomy\TermAccessControlHandler::checkAccess()
        return [
            JSONAPI_FILTER_AMONG_ALL => AccessResult::allowedIfHasPermission($account, 'administer taxonomy'),
            JSONAPI_FILTER_AMONG_PUBLISHED => AccessResult::allowedIfHasPermission($account, 'access content'),
        ];
    }
    
    /**
     * Implements hook_jsonapi_ENTITY_TYPE_filter_access() for 'user'.
     */
    public function jsonapiUserFilterAccess(EntityTypeInterface $entity_type, AccountInterface $account) {
        // @see \Drupal\user\UserAccessControlHandler::checkAccess()
        // \Drupal\jsonapi\Access\TemporaryQueryGuard adds the condition for
        // (!isAnonymous()), so this does not have to.
        return [
            JSONAPI_FILTER_AMONG_OWN => AccessResult::allowed(),
            JSONAPI_FILTER_AMONG_ENABLED => AccessResult::allowedIfHasPermission($account, 'access user profiles'),
        ];
    }
    
    /**
     * Implements hook_jsonapi_ENTITY_TYPE_filter_access() for 'workspace'.
     */
    public function jsonapiWorkspaceFilterAccess(EntityTypeInterface $entity_type, AccountInterface $account) {
        // @see \Drupal\workspaces\WorkspaceAccessControlHandler::checkAccess()
        return [
            JSONAPI_FILTER_AMONG_ALL => AccessResult::allowedIfHasPermission($account, 'view any workspace'),
            JSONAPI_FILTER_AMONG_OWN => AccessResult::allowedIfHasPermission($account, 'view own workspace'),
        ];
    }

}