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/*
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();
});
});
}
};
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