| /* |
| MIT License http://www.opensource.org/licenses/mit-license.php |
| Author Tobias Koppers @sokra |
| */ |
| "use strict"; |
| |
| function getCacheId(request, withContext) { |
| return JSON.stringify({ |
| context: withContext ? request.context : "", |
| path: request.path, |
| query: request.query, |
| request: request.request |
| }); |
| } |
| |
| module.exports = class UnsafeCachePlugin { |
| constructor(source, filterPredicate, cache, withContext, target) { |
| this.source = source; |
| this.filterPredicate = filterPredicate; |
| this.withContext = withContext; |
| this.cache = cache || {}; |
| this.target = target; |
| } |
| |
| apply(resolver) { |
| const target = resolver.ensureHook(this.target); |
| resolver |
| .getHook(this.source) |
| .tapAsync("UnsafeCachePlugin", (request, resolveContext, callback) => { |
| if (!this.filterPredicate(request)) return callback(); |
| const cacheId = getCacheId(request, this.withContext); |
| const cacheEntry = this.cache[cacheId]; |
| if (cacheEntry) { |
| return callback(null, cacheEntry); |
| } |
| resolver.doResolve( |
| target, |
| request, |
| null, |
| resolveContext, |
| (err, result) => { |
| if (err) return callback(err); |
| if (result) return callback(null, (this.cache[cacheId] = result)); |
| callback(); |
| } |
| ); |
| }); |
| } |
| }; |