unleash-server/dist/lib/features/metrics/unknown-flags/fake-unknown-flags-store.js

Unleash is an enterprise ready feature flag service. It provides different strategies for handling feature flags.

export class FakeUnknownFlagsStore {
    constructor() {
        this.unknownFlagMap = new Map();
    }
    getKey(flag) {
        return `${flag.name}:${flag.appName}:${flag.environment}`;
    }
    async insert(flags) {
        this.unknownFlagMap.clear();
        for (const flag of flags) {
            this.unknownFlagMap.set(this.getKey(flag), flag);
        }
    }
    async getAll({ limit, orderBy } = {}) {
        const flags = Array.from(this.unknownFlagMap.values());
        if (orderBy) {
            flags.sort((a, b) => {
                for (const { column, order } of orderBy) {
                    if (a[column] < b[column])
                        return order === 'asc' ? -1 : 1;
                    if (a[column] > b[column])
                        return order === 'asc' ? 1 : -1;
                }
                return 0;
            });
        }
        if (!limit)
            return flags;
        return flags.slice(0, limit);
    }
    async clear(hoursAgo) {
        const cutoff = Date.now() - hoursAgo * 60 * 60 * 1000;
        for (const [key, flag] of this.unknownFlagMap.entries()) {
            if (flag.seenAt.getTime() < cutoff) {
                this.unknownFlagMap.delete(key);
            }
        }
    }
    async deleteAll() {
        this.unknownFlagMap.clear();
    }
    async count() {
        return this.unknownFlagMap.size;
    }
}
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