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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | /**
* File Cache Token
*
* Creates a cache token based on file modification times.
* Used to invalidate configuration caches when files change.
*/
import fs from 'fs';
/**
* FileCacheToken generates a unique token based on file modification times
* Used for cache invalidation when source files change
*/
export class FileCacheToken {
files;
token;
isBuilt;
constructor(files) {
this.files = files;
this.token = null;
this.isBuilt = false;
}
/**
* Build the cache token from file modification times
*/
async build() {
if (this.isBuilt) {
return this;
}
const signatures = [];
const promises = (this.files || []).map((file) => new Promise((resolve, reject) => {
fs.stat(file, (err, stats) => {
if (err)
return reject(err);
signatures.push(`${file}>${stats.mtime.getTime()}`);
resolve();
});
}));
await Promise.all(promises);
this.token = signatures.sort().join('|');
this.isBuilt = true;
this.files = null;
return this;
}
/**
* Check if this token matches another token
* @param other - Another FileCacheToken to compare against
* @returns true if tokens match, false otherwise
*/
async match(other) {
await Promise.all([this.build(), other.build()]);
return this.token === other.token;
}
/**
* Get the token value (after building)
*/
getToken() {
return this.token;
}
}
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