@botonic/plugin-contentful
Version:
Botonic Plugin Contentful is one of the **[available](https://github.com/hubtype/botonic/tree/master/packages)** plugins for Botonic. **[Contentful](http://www.contentful.com)** is a CMS (Content Management System) which manages contents of a great variet
60 lines • 2.09 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.fallbackStrategy = exports.cacheForeverStrategy = exports.Memoizer = exports.jsonNormalizer = void 0;
const tslib_1 = require("tslib");
const cache_1 = require("./cache");
const jsonNormalizer = (...args) => {
return JSON.stringify(args);
};
exports.jsonNormalizer = jsonNormalizer;
class Memoizer {
constructor(opts) {
this.opts = {
strategy: opts.strategy,
normalizer: opts.normalizer || exports.jsonNormalizer,
cacheFactory: opts.cacheFactory || (() => new cache_1.InMemoryCache()),
};
}
memoize(func) {
const cache = this.opts.cacheFactory();
const f = (...args) => this.opts.strategy(cache, this.opts.normalizer, func, ...args);
return f;
}
}
exports.Memoizer = Memoizer;
/***
* Only re-invoke if not in cache
*/
const cacheForeverStrategy = (cache, normalizer = exports.jsonNormalizer, func, ...args) => tslib_1.__awaiter(void 0, void 0, void 0, function* () {
const id = normalizer(...args);
let val = cache.get(id);
if (val === cache_1.NOT_FOUND_IN_CACHE) {
val = yield func(...args);
cache.set(id, val);
}
return val;
});
exports.cacheForeverStrategy = cacheForeverStrategy;
/**
* Always invokes the function, but fallbacks to last invocation result if available
*/
function fallbackStrategy(usingFallback) {
return (cache, normalizer = exports.jsonNormalizer, func, ...args) => tslib_1.__awaiter(this, void 0, void 0, function* () {
const id = normalizer(...args);
const oldVal = cache.get(id);
try {
const newVal = yield func(...args);
cache.set(id, newVal);
return newVal;
}
catch (e) {
if (oldVal !== cache_1.NOT_FOUND_IN_CACHE) {
yield usingFallback(String(func.name), args, e);
return oldVal;
}
throw e;
}
});
}
exports.fallbackStrategy = fallbackStrategy;
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