simple-on-disk-cache/dist/key/castToSafeOnDiskCacheKey.js

A simple on-disk cache, supporting local and remote filesystem targets, with time based expiration policies.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.castToSafeOnDiskCacheKey = void 0;
const hash_fns_1 = require("hash-fns");
const serde_fns_1 = require("serde-fns");
/**
 * .what = casts details about the execution of a procedure into a safe on disk cache key
 * .why =
 *   - eliminates special characters, which are incompatible with on-disk file names
 *   - ensures to namespace to a procedure name, to avoid cross procedures cache-key collisions
 *   - reminds to use a procedure.version, to enable invalidation of prior versions of procedures
 */
const castToSafeOnDiskCacheKey = (input) => [
    // fn name
    input.procedure.name,
    // input preview (dynamodbkeys limit = 2k, s3keys limit = 1k, ondisk limit = 255)
    (0, serde_fns_1.asSerialJSON)(input.execution.input)
        .replace(/[{}[\]:,]/gi, '_')
        .replace(/[^0-9a-z_]/gi, '')
        .replace(/__+/g, '_')
        .slice(0, 100) // todo: make the length dependent on the rest of the cache key. fill the 255char limit (consider name, account id, and hash)
        .replace(/^_/, '')
        .replace(/_$/, ''), // stringify + replace all non-alphanumeric input,
    // then, suffix with a unique id of the input + prompt
    (0, hash_fns_1.asHashSha256Sync)((0, serde_fns_1.asSerialJSON)([
        input.execution.input,
        input.procedure.version
            ? (0, hash_fns_1.asHashSha256Sync)(input.procedure.version)
            : null,
    ])),
].join('.');
exports.castToSafeOnDiskCacheKey = castToSafeOnDiskCacheKey;
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