import { DeferredEntity } from '../processing';
/**
 * A 'full' mutation replaces all existing entities created by this entity provider with new ones.
 * A 'delta' mutation can both add and remove entities provided by this provider. Previously provided
 * entities from a 'full' mutation are not removed.
 *
 * @public
 */
export type EntityProviderMutation = {
    type: 'full';
    entities: DeferredEntity[];
} | {
    type: 'delta';
    added: DeferredEntity[];
    removed: (DeferredEntity | {
        entityRef: string;
        locationKey?: string;
    })[];
};
/**
 * The options given to an entity refresh operation.
 *
 * @public
 */
export type EntityProviderRefreshOptions = {
    keys: string[];
};
/**
 * The connection between the catalog and the entity provider.
 * Entity providers use this connection to add and remove entities from the catalog.
 *
 * @public
 */
export interface EntityProviderConnection {
    /**
     * Applies either a full or a delta update to the catalog engine.
     */
    applyMutation(mutation: EntityProviderMutation): Promise<void>;
    /**
     * Schedules a refresh on all of the entities that have a matching refresh key associated with the provided keys.
     */
    refresh(options: EntityProviderRefreshOptions): Promise<void>;
}
/**
 * An entity provider is able to provide entities to the catalog.
 * See https://backstage.io/docs/features/software-catalog/life-of-an-entity for more details.
 *
 * @public
 */
export interface EntityProvider {
    /**
     * The name of the provider, which must be unique for all providers that are
     * active in a catalog, and stable over time since emitted entities are
     * related to the provider by this name.
     */
    getProviderName(): string;
    /**
     * Called upon initialization by the catalog engine.
     */
    connect(connection: EntityProviderConnection): Promise<void>;
}