class FileViewsData

class FileViewsData extends EntityViewsData {
    
    /**
     * {@inheritdoc}
     */
    public function getViewsData() {
        $data = parent::getViewsData();
        // @TODO There is no corresponding information in entity metadata.
        $data['file_managed']['table']['base']['help'] = $this->t('Files maintained by Drupal and various modules.');
        $data['file_managed']['table']['base']['defaults']['field'] = 'filename';
        $data['file_managed']['table']['wizard_id'] = 'file_managed';
        $data['file_managed']['fid']['argument'] = [
            'id' => 'file_fid',
            // The field to display in the summary.
'name field' => 'filename',
            'numeric' => TRUE,
        ];
        $data['file_managed']['fid']['relationship'] = [
            'title' => $this->t('File usage'),
            'help' => $this->t('Relate file entities to their usage.'),
            'id' => 'standard',
            'base' => 'file_usage',
            'base field' => 'fid',
            'field' => 'fid',
            'label' => $this->t('File usage'),
        ];
        $data['file_managed']['uri']['field']['default_formatter'] = 'file_uri';
        $data['file_managed']['filemime']['field']['default_formatter'] = 'file_filemime';
        $data['file_managed']['extension'] = [
            'title' => $this->t('Extension'),
            'help' => $this->t('The extension of the file.'),
            'real field' => 'filename',
            'field' => [
                'entity_type' => 'file',
                'field_name' => 'filename',
                'default_formatter' => 'file_extension',
                'id' => 'field',
                'click sortable' => FALSE,
            ],
        ];
        $data['file_managed']['filesize']['field']['default_formatter'] = 'file_size';
        $data['file_managed']['status']['field']['default_formatter_settings'] = [
            'format' => 'custom',
            'format_custom_false' => $this->t('Temporary'),
            'format_custom_true' => $this->t('Permanent'),
        ];
        $data['file_managed']['status']['filter']['id'] = 'file_status';
        $data['file_managed']['uid']['relationship']['title'] = $this->t('User who uploaded');
        $data['file_managed']['uid']['relationship']['label'] = $this->t('User who uploaded');
        $data['file_usage']['table']['group'] = $this->t('File Usage');
        // Provide field-type-things to several base tables; on the core files table
        // ("file_managed") so that we can create relationships from files to
        // entities, and then on each core entity type base table so that we can
        // provide general relationships between entities and files.
        $data['file_usage']['table']['join'] = [
            'file_managed' => [
                'field' => 'fid',
                'left_field' => 'fid',
            ],
            // Link ourselves to the {node_field_data} table
            // so we can provide node->file relationships.
'node_field_data' => [
                'field' => 'id',
                'left_field' => 'nid',
                'extra' => [
                    [
                        'field' => 'type',
                        'value' => 'node',
                    ],
                ],
            ],
            // Link ourselves to the {users_field_data} table
            // so we can provide user->file relationships.
'users_field_data' => [
                'field' => 'id',
                'left_field' => 'uid',
                'extra' => [
                    [
                        'field' => 'type',
                        'value' => 'user',
                    ],
                ],
            ],
            // Link ourselves to the {comment_field_data} table
            // so we can provide comment->file relationships.
'comment' => [
                'field' => 'id',
                'left_field' => 'cid',
                'extra' => [
                    [
                        'field' => 'type',
                        'value' => 'comment',
                    ],
                ],
            ],
            // Link ourselves to the {taxonomy_term_field_data} table
            // so we can provide taxonomy_term->file relationships.
'taxonomy_term_data' => [
                'field' => 'id',
                'left_field' => 'tid',
                'extra' => [
                    [
                        'field' => 'type',
                        'value' => 'taxonomy_term',
                    ],
                ],
            ],
        ];
        // Provide a relationship between the files table and each entity type,
        // and between each entity type and the files table. Entity->file
        // relationships are type-restricted in the joins declared above, and
        // file->entity relationships are type-restricted in the relationship
        // declarations below.
        // Describes relationships between files and nodes.
        $data['file_usage']['file_to_node'] = [
            'title' => $this->t('Content'),
            'help' => $this->t('Content that is associated with this file, usually because this file is in a field on the content.'),
            // Only provide this field/relationship/etc.,
            // when the 'file_managed' base table is present.
'skip base' => [
                'node_field_data',
                'node_field_revision',
                'users_field_data',
                'comment_field_data',
                'taxonomy_term_field_data',
            ],
            'real field' => 'id',
            'relationship' => [
                'title' => $this->t('Content'),
                'label' => $this->t('Content'),
                'base' => 'node_field_data',
                'base field' => 'nid',
                'relationship field' => 'id',
                'extra' => [
                    [
                        'table' => 'file_usage',
                        'field' => 'type',
                        'operator' => '=',
                        'value' => 'node',
                    ],
                ],
            ],
        ];
        $data['file_usage']['node_to_file'] = [
            'title' => $this->t('File'),
            'help' => $this->t('A file that is associated with this node, usually because it is in a field on the node.'),
            // Only provide this field/relationship/etc.,
            // when the 'node' base table is present.
'skip base' => [
                'file_managed',
                'users_field_data',
                'comment_field_data',
                'taxonomy_term_field_data',
            ],
            'real field' => 'fid',
            'relationship' => [
                'title' => $this->t('File'),
                'label' => $this->t('File'),
                'base' => 'file_managed',
                'base field' => 'fid',
                'relationship field' => 'fid',
            ],
        ];
        // Describes relationships between files and users.
        $data['file_usage']['file_to_user'] = [
            'title' => $this->t('User'),
            'help' => $this->t('A user that is associated with this file, usually because this file is in a field on the user.'),
            // Only provide this field/relationship/etc.,
            // when the 'file_managed' base table is present.
'skip base' => [
                'node_field_data',
                'node_field_revision',
                'users_field_data',
                'comment_field_data',
                'taxonomy_term_field_data',
            ],
            'real field' => 'id',
            'relationship' => [
                'title' => $this->t('User'),
                'label' => $this->t('User'),
                'base' => 'users',
                'base field' => 'uid',
                'relationship field' => 'id',
                'extra' => [
                    [
                        'table' => 'file_usage',
                        'field' => 'type',
                        'operator' => '=',
                        'value' => 'user',
                    ],
                ],
            ],
        ];
        $data['file_usage']['user_to_file'] = [
            'title' => $this->t('File'),
            'help' => $this->t('A file that is associated with this user, usually because it is in a field on the user.'),
            // Only provide this field/relationship/etc.,
            // when the 'users' base table is present.
'skip base' => [
                'file_managed',
                'node_field_data',
                'node_field_revision',
                'comment_field_data',
                'taxonomy_term_field_data',
            ],
            'real field' => 'fid',
            'relationship' => [
                'title' => $this->t('File'),
                'label' => $this->t('File'),
                'base' => 'file_managed',
                'base field' => 'fid',
                'relationship field' => 'fid',
            ],
        ];
        // Describes relationships between files and comments.
        $data['file_usage']['file_to_comment'] = [
            'title' => $this->t('Comment'),
            'help' => $this->t('A comment that is associated with this file, usually because this file is in a field on the comment.'),
            // Only provide this field/relationship/etc.,
            // when the 'file_managed' base table is present.
'skip base' => [
                'node_field_data',
                'node_field_revision',
                'users_field_data',
                'comment_field_data',
                'taxonomy_term_field_data',
            ],
            'real field' => 'id',
            'relationship' => [
                'title' => $this->t('Comment'),
                'label' => $this->t('Comment'),
                'base' => 'comment_field_data',
                'base field' => 'cid',
                'relationship field' => 'id',
                'extra' => [
                    [
                        'table' => 'file_usage',
                        'field' => 'type',
                        'operator' => '=',
                        'value' => 'comment',
                    ],
                ],
            ],
        ];
        $data['file_usage']['comment_to_file'] = [
            'title' => $this->t('File'),
            'help' => $this->t('A file that is associated with this comment, usually because it is in a field on the comment.'),
            // Only provide this field/relationship/etc.,
            // when the 'comment' base table is present.
'skip base' => [
                'file_managed',
                'node_field_data',
                'node_field_revision',
                'users_field_data',
                'taxonomy_term_field_data',
            ],
            'real field' => 'fid',
            'relationship' => [
                'title' => $this->t('File'),
                'label' => $this->t('File'),
                'base' => 'file_managed',
                'base field' => 'fid',
                'relationship field' => 'fid',
            ],
        ];
        // Describes relationships between files and taxonomy_terms.
        $data['file_usage']['file_to_taxonomy_term'] = [
            'title' => $this->t('Taxonomy Term'),
            'help' => $this->t('A taxonomy term that is associated with this file, usually because this file is in a field on the taxonomy term.'),
            // Only provide this field/relationship/etc.,
            // when the 'file_managed' base table is present.
'skip base' => [
                'node_field_data',
                'node_field_revision',
                'users_field_data',
                'comment_field_data',
                'taxonomy_term_field_data',
            ],
            'real field' => 'id',
            'relationship' => [
                'title' => $this->t('Taxonomy Term'),
                'label' => $this->t('Taxonomy Term'),
                'base' => 'taxonomy_term_data',
                'base field' => 'tid',
                'relationship field' => 'id',
                'extra' => [
                    [
                        'table' => 'file_usage',
                        'field' => 'type',
                        'operator' => '=',
                        'value' => 'taxonomy_term',
                    ],
                ],
            ],
        ];
        $data['file_usage']['taxonomy_term_to_file'] = [
            'title' => $this->t('File'),
            'help' => $this->t('A file that is associated with this taxonomy term, usually because it is in a field on the taxonomy term.'),
            // Only provide this field/relationship/etc.,
            // when the 'taxonomy_term_data' base table is present.
'skip base' => [
                'file_managed',
                'node_field_data',
                'node_field_revision',
                'users_field_data',
                'comment_field_data',
            ],
            'real field' => 'fid',
            'relationship' => [
                'title' => $this->t('File'),
                'label' => $this->t('File'),
                'base' => 'file_managed',
                'base field' => 'fid',
                'relationship field' => 'fid',
            ],
        ];
        // Provide basic fields from the {file_usage} table to all of the base tables
        // we've declared joins to, because there is no 'skip base' property on these
        // fields.
        $data['file_usage']['module'] = [
            'title' => $this->t('Module'),
            'help' => $this->t('The module managing this file relationship.'),
            'field' => [
                'id' => 'standard',
            ],
            'filter' => [
                'id' => 'string',
            ],
            'argument' => [
                'id' => 'string',
            ],
            'sort' => [
                'id' => 'standard',
            ],
        ];
        $data['file_usage']['type'] = [
            'title' => $this->t('Entity type'),
            'help' => $this->t('The type of entity that is related to the file.'),
            'field' => [
                'id' => 'standard',
            ],
            'filter' => [
                'id' => 'string',
            ],
            'argument' => [
                'id' => 'string',
            ],
            'sort' => [
                'id' => 'standard',
            ],
        ];
        $data['file_usage']['id'] = [
            'title' => $this->t('Entity ID'),
            'help' => $this->t('The ID of the entity that is related to the file.'),
            'field' => [
                'id' => 'numeric',
            ],
            'argument' => [
                'id' => 'numeric',
            ],
            'filter' => [
                'id' => 'numeric',
            ],
            'sort' => [
                'id' => 'standard',
            ],
        ];
        $data['file_usage']['count'] = [
            'title' => $this->t('Use count'),
            'help' => $this->t('The number of times the file is used by this entity.'),
            'field' => [
                'id' => 'numeric',
            ],
            'filter' => [
                'id' => 'numeric',
            ],
            'sort' => [
                'id' => 'standard',
            ],
        ];
        $data['file_usage']['entity_label'] = [
            'title' => $this->t('Entity label'),
            'help' => $this->t('The label of the entity that is related to the file.'),
            'real field' => 'id',
            'field' => [
                'id' => 'entity_label',
                'entity type field' => 'type',
            ],
        ];
        return $data;
    }

}