@ptc-org/nestjs-query-graphql
Version:
Nestjs graphql query adapter
43 lines • 1.73 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.FindRelationsLoader = void 0;
class FindRelationsLoader {
constructor(RelationDTO, relationName) {
this.RelationDTO = RelationDTO;
this.relationName = relationName;
}
createLoader(service, opts) {
return async (args) => {
const grouped = this.groupFinds(args, opts);
return this.loadResults(service, grouped);
};
}
async loadResults(service, findRelationsMap) {
const results = [];
await Promise.all([...findRelationsMap.values()].map(async (args) => {
const { filter, withDeleted, lookedAhead } = args[0];
const dtos = args.map((a) => a.dto);
const opts = { filter, withDeleted, lookedAhead };
const relationResults = await service.findRelation(this.RelationDTO, this.relationName, dtos, opts);
const dtoRelations = dtos.map((dto) => relationResults.get(dto));
dtoRelations.forEach((relation, index) => {
results[args[index].index] = relation;
});
}));
return results;
}
groupFinds(queryArgs, opts) {
// group
return queryArgs.reduce((map, args, index) => {
const filterJson = JSON.stringify(args.filter);
if (!map.has(filterJson)) {
map.set(filterJson, []);
}
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
map.get(filterJson).push({ ...args, ...opts, index });
return map;
}, new Map());
}
}
exports.FindRelationsLoader = FindRelationsLoader;
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