ts-flex-query/functions/aggregation.js

Flexible and type-safe data queries

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.aggregation = void 0;
const lodash_1 = require("lodash");
const utils_1 = require("../helpers/utils");
function applyToDefinedValues(values, func, defaultResult) {
    const definedValues = values.filter(utils_1.isDefined);
    return definedValues.length ? func(definedValues) : defaultResult;
}
exports.aggregation = {
    count(values) {
        var _a;
        return (_a = values === null || values === void 0 ? void 0 : values.length) !== null && _a !== void 0 ? _a : 0;
    },
    countDistinct(values) {
        return values ? (0, lodash_1.uniqWith)(values, lodash_1.isEqual).length : 0;
    },
    maximum(values) {
        return applyToDefinedValues(values, (v) => Math.max(...v), undefined);
    },
    minimum(values) {
        return applyToDefinedValues(values, (v) => Math.min(...v), undefined);
    },
    sum(values) {
        return values.filter(utils_1.isDefined).reduce((acc, v) => acc + v, 0);
    },
    average(values) {
        return applyToDefinedValues(values, (vs) => exports.aggregation.sum(vs) / vs.length, undefined);
    }
};
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