magicbell/dist/esm/client/cache.js

MagicBell API wrapper

import { debug } from './log.js';
function sortObj(obj) {
    const entries = Object.entries(obj || {});
    if (entries.length === 0)
        return undefined;
    return Object.fromEntries(entries.sort());
}
export class Cache {
    #records = new Map();
    #ttl;
    constructor(options) {
        this.#ttl = options?.ttl ?? 1000;
    }
    getRequestKey(args) {
        const { method, url, data, headers } = args;
        return JSON.stringify({
            method,
            url: url.toString(),
            data: sortObj(data),
            headers: sortObj(headers),
        });
    }
    #flush() {
        const currentTimestamp = Date.now();
        for (const [key, { timestamp }] of this.#records.entries()) {
            if (currentTimestamp - timestamp >= this.#ttl) {
                const age = currentTimestamp - timestamp;
                debug('cache FLUSH', { key, age, ttl: this.#ttl });
                this.#records.delete(key);
            }
        }
    }
    get(key) {
        this.#flush();
        const record = this.#records.get(key);
        if (record) {
            const age = Date.now() - record.timestamp;
            debug('cache HIT', { key, age, ttl: this.#ttl });
            return record.promise;
        }
        debug('cache MISS', { key, ttl: this.#ttl });
        return null;
    }
    set(key, promise) {
        if (this.#ttl <= 0)
            return;
        const timestamp = Date.now();
        debug('cache SET', { key, timestamp, ttl: this.#ttl });
        this.#records.set(key, { promise, timestamp });
    }
}
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