@featurevisor/core/lib/builder/getFeatureRanges.js

Core package of Featurevisor for Node.js usage

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getFeatureRanges = getFeatureRanges;
const fs = require("fs");
async function getFeatureRanges(projectConfig, datasource) {
    const featureRanges = new Map();
    const featureIsInGroup = {}; // featureKey => boolean
    const groups = [];
    if (fs.existsSync(projectConfig.groupsDirectoryPath)) {
        const groupFiles = await datasource.listGroups();
        for (const groupKey of groupFiles) {
            const parsedGroup = await datasource.readGroup(groupKey);
            groups.push({
                ...parsedGroup,
                key: groupKey,
            });
            let accumulatedPercentage = 0;
            parsedGroup.slots.forEach(function (slot, slotIndex) {
                const isFirstSlot = slotIndex === 0;
                if (slot.feature) {
                    const featureKey = slot.feature;
                    if (typeof featureKey === "string") {
                        featureIsInGroup[featureKey] = true;
                    }
                    const featureRangesForFeature = featureRanges.get(featureKey) || [];
                    const start = isFirstSlot ? accumulatedPercentage : accumulatedPercentage + 1;
                    const end = accumulatedPercentage + slot.percentage * 1000;
                    featureRangesForFeature.push([start, end]);
                    featureRanges.set(slot.feature, featureRangesForFeature);
                }
                accumulatedPercentage += slot.percentage * 1000;
            });
        }
    }
    return { featureRanges, featureIsInGroup };
}
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