62 lines
2.1 KiB
JavaScript
62 lines
2.1 KiB
JavaScript
var __defProp = Object.defineProperty;
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var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
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var __getOwnPropNames = Object.getOwnPropertyNames;
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var __hasOwnProp = Object.prototype.hasOwnProperty;
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var __export = (target, all) => {
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for (var name in all)
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__defProp(target, name, { get: all[name], enumerable: true });
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};
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var __copyProps = (to, from, except, desc) => {
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if (from && typeof from === "object" || typeof from === "function") {
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for (let key of __getOwnPropNames(from))
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if (!__hasOwnProp.call(to, key) && key !== except)
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__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
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}
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return to;
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};
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var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
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var group_exports = {};
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__export(group_exports, {
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$group: () => $group
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});
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module.exports = __toCommonJS(group_exports);
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var import_core = require("../../core");
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var import_util = require("../../util");
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const ID_KEY = "_id";
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const $group = (collection, expr, options) => {
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(0, import_util.assert)((0, import_util.has)(expr, ID_KEY), "$group specification must include an '_id'");
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const idExpr = expr[ID_KEY];
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const copts = import_core.ComputeOptions.init(options);
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const newFields = Object.keys(expr).filter((k) => k != ID_KEY);
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return collection.transform((coll) => {
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const partitions = (0, import_util.groupBy)(
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coll,
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(obj) => (0, import_core.computeValue)(obj, idExpr, null, options),
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options.hashFunction
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);
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let i = -1;
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const partitionKeys = Array.from(partitions.keys());
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return () => {
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if (++i === partitions.size) return { done: true };
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const groupId = partitionKeys[i];
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const obj = {};
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if (groupId !== void 0) {
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obj[ID_KEY] = groupId;
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}
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for (const key of newFields) {
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obj[key] = (0, import_core.computeValue)(
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partitions.get(groupId),
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expr[key],
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null,
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copts.update(null, { groupId })
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);
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}
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return { value: obj, done: false };
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};
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});
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};
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// Annotate the CommonJS export names for ESM import in node:
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0 && (module.exports = {
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$group
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});
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