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{ ObjectLiteral } from \"../../common/ObjectLiteral\"\nimport { EntityMetadata } from \"../../metadata/EntityMetadata\"\nimport { EntityManager } from \"../../entity-manager/EntityManager\"\nimport { RelationMetadata } from \"../../metadata/RelationMetadata\"\n\n/**\n */\nclass LoadMapItem {\n    entity?: ObjectLiteral\n    plainEntity: ObjectLiteral\n    metadata: EntityMetadata\n    parentLoadMapItem?: LoadMapItem\n    relation?: RelationMetadata\n\n    constructor(\n        plainEntity: ObjectLiteral,\n        metadata: EntityMetadata,\n        parentLoadMapItem?: LoadMapItem,\n        relation?: RelationMetadata,\n    ) {\n        this.plainEntity = plainEntity\n        this.metadata = metadata\n        this.parentLoadMapItem = parentLoadMapItem\n        this.relation = relation\n    }\n\n    get target(): Function | string {\n        return this.metadata.target\n    }\n\n    get id(): any {\n        return this.metadata.getEntityIdMixedMap(this.plainEntity)\n    }\n}\n\nclass LoadMap {\n    loadMapItems: LoadMapItem[] = []\n\n    get mainLoadMapItem(): LoadMapItem | undefined {\n        return this.loadMapItems.find(\n            (item) => !item.relation && !item.parentLoadMapItem,\n        )\n    }\n\n    addLoadMap(newLoadMap: LoadMapItem) {\n        const item = this.loadMapItems.find(\n            (item) =>\n                item.target === newLoadMap.target && item.id === newLoadMap.id,\n        )\n        if (!item) this.loadMapItems.push(newLoadMap)\n    }\n\n    fillEntities(target: Function | string, entities: any[]) {\n        entities.forEach((entity) => {\n            const item = this.loadMapItems.find((loadMapItem) => {\n                return (\n                    loadMapItem.target === target &&\n                    loadMapItem.metadata.compareEntities(\n                        entity,\n                        loadMapItem.plainEntity,\n                    )\n                )\n            })\n            if (item) item.entity = entity\n        })\n    }\n\n    groupByTargetIds(): { target: Function | string; ids: any[] }[] {\n        const groups: { target: Function | string; ids: any[] }[] = []\n        this.loadMapItems.forEach((loadMapItem) => {\n            let group = groups.find(\n                (group) => group.target === loadMapItem.target,\n            )\n            if (!group) {\n                group = { target: loadMapItem.target, ids: [] }\n                groups.push(group)\n            }\n\n            group.ids.push(loadMapItem.id)\n        })\n        return groups\n    }\n}\n\n/**\n * Transforms plain old javascript object\n * Entity is constructed based on its entity metadata.\n */\nexport class PlainObjectToDatabaseEntityTransformer {\n    constructor(private manager: EntityManager) {}\n\n    // -------------------------------------------------------------------------\n    // Public Methods\n    // -------------------------------------------------------------------------\n\n    async transform(\n        plainObject: ObjectLiteral,\n        metadata: EntityMetadata,\n    ): Promise<ObjectLiteral | undefined> {\n        // if plain object does not have id then nothing to load really\n        if (!metadata.hasAllPrimaryKeys(plainObject))\n            return Promise.reject(\n                \"Given object does not have a primary column, cannot transform it to database entity.\",\n            )\n\n        // create a special load map that will hold all metadata that will be used to operate with entities easily\n        const loadMap = new LoadMap()\n        const fillLoadMap = (\n            entity: ObjectLiteral,\n            entityMetadata: EntityMetadata,\n            parentLoadMapItem?: LoadMapItem,\n            relation?: RelationMetadata,\n        ) => {\n            const item = new LoadMapItem(\n                entity,\n                entityMetadata,\n                parentLoadMapItem,\n                relation,\n            )\n            loadMap.addLoadMap(item)\n\n            entityMetadata\n                .extractRelationValuesFromEntity(entity, metadata.relations)\n                .filter((value) => value !== null && value !== undefined)\n                .forEach(([relation, value, inverseEntityMetadata]) =>\n                    fillLoadMap(value, inverseEntityMetadata, item, relation),\n                )\n        }\n        fillLoadMap(plainObject, metadata)\n        // load all entities and store them in the load map\n        await Promise.all(\n            loadMap.groupByTargetIds().map((targetWithIds) => {\n                // todo: fix type hinting\n                return this.manager\n                    .findByIds<ObjectLiteral>(\n                        targetWithIds.target as any,\n                        targetWithIds.ids,\n                    )\n                    .then((entities) =>\n                        loadMap.fillEntities(targetWithIds.target, entities),\n                    )\n            }),\n        )\n\n        // go through each item in the load map and set their entity relationship using metadata stored in load map\n        loadMap.loadMapItems.forEach((loadMapItem) => {\n            if (\n                !loadMapItem.relation ||\n                !loadMapItem.entity ||\n                !loadMapItem.parentLoadMapItem ||\n                !loadMapItem.parentLoadMapItem.entity\n            )\n                return\n\n            if (\n                loadMapItem.relation.isManyToMany ||\n                loadMapItem.relation.isOneToMany\n            ) {\n                if (\n                    !loadMapItem.parentLoadMapItem.entity[\n                        loadMapItem.relation.propertyName\n                    ]\n                )\n                    loadMapItem.parentLoadMapItem.entity[\n                        loadMapItem.relation.propertyName\n                    ] = []\n                loadMapItem.parentLoadMapItem.entity[\n                    loadMapItem.relation.propertyName\n                ].push(loadMapItem.entity)\n            } else {\n                loadMapItem.parentLoadMapItem.entity[\n                    loadMapItem.relation.propertyName\n                ] = loadMapItem.entity\n            }\n        })\n\n        return loadMap.mainLoadMapItem\n            ? loadMap.mainLoadMapItem.entity\n            : undefined\n    }\n}\n"],"sourceRoot":"../.."}