commitmnt/dist/main/lib/utils/cache/cache.js

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"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Cache = void 0;
const crypto_1 = __importDefault(require("crypto"));
const path_1 = __importDefault(require("path"));
const fs_extra_1 = __importDefault(require("fs-extra"));
/**
 * Very simple cache class that uses the filesystem
 */
class Cache {
    /**
     * @param baseDir the directory to create the .cache directory in
     * @constructor
     */
    constructor(baseDir = './') {
        this.dir = path_1.default.resolve(baseDir, '.cache');
        if (!fs_extra_1.default.existsSync(this.dir)) {
            fs_extra_1.default.mkdirSync(this.dir, { recursive: true });
        }
    }
    /**
     * Gets a value from the cache
     *
     * @param key the cache key to lookup
     * @template R the type of the return value
     * @returns the value for `key` as json or null if key doesn't exist
     */
    async get(key) {
        const file = this.getPath(key);
        if (!fs_extra_1.default.existsSync(file))
            return;
        return fs_extra_1.default.readJson(this.getPath(key), { throws: false });
    }
    /**
     * Sets a value to the cache
     *
     * @param key the cache key to set the value at
     * @param value the value to set
     * @template R the type of the value
     */
    async set(key, val) {
        const file = this.getPath(key);
        return fs_extra_1.default.writeJson(file, val);
    }
    /**
     * Gets the path to a file for a given key
     *
     * @param key the cache key to get the path for
     * @returns the path
     */
    getPath(key) {
        return path_1.default.join(this.dir, this.hash(key));
    }
    /**
     * Hashes a given key
     *
     * @param key the cache key to hash
     * @returns the hashed key
     */
    hash(key) {
        return crypto_1.default.createHash('md5').update(key).digest('hex');
    }
}
exports.Cache = Cache;
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