initial commit

node_modules/memoizee/ext/max-age.js

@@ -0,0 +1,90 @@
+/* eslint consistent-this: 0 */
+
+// Timeout cached values
+
+"use strict";
+
+var aFrom      = require("es5-ext/array/from")
+  , forEach    = require("es5-ext/object/for-each")
+  , nextTick   = require("next-tick")
+  , isPromise  = require("is-promise")
+  , timeout    = require("timers-ext/valid-timeout")
+  , extensions = require("../lib/registered-extensions");
+
+var noop = Function.prototype, max = Math.max, min = Math.min, create = Object.create;
+
+extensions.maxAge = function (maxAge, conf, options) {
+	var timeouts, postfix, preFetchAge, preFetchTimeouts;
+
+	maxAge = timeout(maxAge);
+	if (!maxAge) return;
+
+	timeouts = create(null);
+	postfix =
+		(options.async && extensions.async) || (options.promise && extensions.promise)
+			? "async"
+			: "";
+	conf.on("set" + postfix, function (id) {
+		timeouts[id] = setTimeout(function () { conf.delete(id); }, maxAge);
+		if (typeof timeouts[id].unref === "function") timeouts[id].unref();
+		if (!preFetchTimeouts) return;
+		if (preFetchTimeouts[id]) {
+			if (preFetchTimeouts[id] !== "nextTick") clearTimeout(preFetchTimeouts[id]);
+		}
+		preFetchTimeouts[id] = setTimeout(function () {
+			delete preFetchTimeouts[id];
+		}, preFetchAge);
+		if (typeof preFetchTimeouts[id].unref === "function") preFetchTimeouts[id].unref();
+	});
+	conf.on("delete" + postfix, function (id) {
+		clearTimeout(timeouts[id]);
+		delete timeouts[id];
+		if (!preFetchTimeouts) return;
+		if (preFetchTimeouts[id] !== "nextTick") clearTimeout(preFetchTimeouts[id]);
+		delete preFetchTimeouts[id];
+	});
+
+	if (options.preFetch) {
+		if (options.preFetch === true || isNaN(options.preFetch)) {
+			preFetchAge = 0.333;
+		} else {
+			preFetchAge = max(min(Number(options.preFetch), 1), 0);
+		}
+		if (preFetchAge) {
+			preFetchTimeouts = {};
+			preFetchAge = (1 - preFetchAge) * maxAge;
+			conf.on("get" + postfix, function (id, args, context) {
+				if (!preFetchTimeouts[id]) {
+					preFetchTimeouts[id] = "nextTick";
+					nextTick(function () {
+						var result;
+						if (preFetchTimeouts[id] !== "nextTick") return;
+						delete preFetchTimeouts[id];
+						conf.delete(id);
+						if (options.async) {
+							args = aFrom(args);
+							args.push(noop);
+						}
+						result = conf.memoized.apply(context, args);
+						if (options.promise) {
+							// Supress eventual error warnings
+							if (isPromise(result)) {
+								if (typeof result.done === "function") result.done(noop, noop);
+								else result.then(noop, noop);
+							}
+						}
+					});
+				}
+			});
+		}
+	}
+
+	conf.on("clear" + postfix, function () {
+		forEach(timeouts, function (id) { clearTimeout(id); });
+		timeouts = {};
+		if (preFetchTimeouts) {
+			forEach(preFetchTimeouts, function (id) { if (id !== "nextTick") clearTimeout(id); });
+			preFetchTimeouts = {};
+		}
+	});
+};