@ptc-org/nestjs-query-graphql
Version:
Nestjs graphql query adapter
42 lines • 1.64 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.CountRelationsLoader = void 0;
class CountRelationsLoader {
constructor(RelationDTO, relationName) {
this.RelationDTO = RelationDTO;
this.relationName = relationName;
}
createLoader(service, opts) {
return async (queryArgs) => {
// group
const queryMap = this.groupQueries(queryArgs);
return this.loadResults(service, queryMap, opts);
};
}
async loadResults(service, countRelationsMap, opts) {
const results = [];
await Promise.all([...countRelationsMap.values()].map(async (args) => {
const { filter } = args[0];
const dtos = args.map((a) => a.dto);
const relationCountResults = await service.countRelations(this.RelationDTO, this.relationName, dtos, filter, opts);
const dtoRelations = dtos.map((dto) => relationCountResults.get(dto) ?? 0);
dtoRelations.forEach((relationCount, index) => {
results[args[index].index] = relationCount;
});
}));
return results;
}
groupQueries(countArgs) {
// group
return countArgs.reduce((map, args, index) => {
const filterJson = JSON.stringify(args.filter);
if (!map.has(filterJson)) {
map.set(filterJson, []);
}
map.get(filterJson)?.push({ ...args, index });
return map;
}, new Map());
}
}
exports.CountRelationsLoader = CountRelationsLoader;
//# sourceMappingURL=count-relations.loader.js.map