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Mini Shell
Mini Shell
/* eslint no-eq-null: 0, eqeqeq: 0, no-unused-vars: 0 */
"use strict";
var customError = require("es5-ext/error/custom")
, defineLength = require("es5-ext/function/_define-length")
, d = require("d")
, ee = require("event-emitter").methods
, resolveResolve = require("./resolve-resolve")
, resolveNormalize = require("./resolve-normalize");
var apply = Function.prototype.apply
, call = Function.prototype.call
, create = Object.create
, defineProperties = Object.defineProperties
, on = ee.on
, emit = ee.emit;
module.exports = function (original, length, options) {
var cache = create(null)
, conf
, memLength
, get
, set
, del
, clear
, extDel
, extGet
, extHas
, normalizer
, getListeners
, setListeners
, deleteListeners
, memoized
, resolve;
if (length !== false) memLength = length;
else if (isNaN(original.length)) memLength = 1;
else memLength = original.length;
if (options.normalizer) {
normalizer = resolveNormalize(options.normalizer);
get = normalizer.get;
set = normalizer.set;
del = normalizer.delete;
clear = normalizer.clear;
}
if (options.resolvers != null) resolve = resolveResolve(options.resolvers);
if (get) {
memoized = defineLength(function (arg) {
var id, result, args = arguments;
if (resolve) args = resolve(args);
id = get(args);
if (id !== null) {
if (hasOwnProperty.call(cache, id)) {
if (getListeners) conf.emit("get", id, args, this);
return cache[id];
}
}
if (args.length === 1) result = call.call(original, this, args[0]);
else result = apply.call(original, this, args);
if (id === null) {
id = get(args);
if (id !== null) throw customError("Circular invocation", "CIRCULAR_INVOCATION");
id = set(args);
} else if (hasOwnProperty.call(cache, id)) {
throw customError("Circular invocation", "CIRCULAR_INVOCATION");
}
cache[id] = result;
if (setListeners) conf.emit("set", id, null, result);
return result;
}, memLength);
} else if (length === 0) {
memoized = function () {
var result;
if (hasOwnProperty.call(cache, "data")) {
if (getListeners) conf.emit("get", "data", arguments, this);
return cache.data;
}
if (arguments.length) result = apply.call(original, this, arguments);
else result = call.call(original, this);
if (hasOwnProperty.call(cache, "data")) {
throw customError("Circular invocation", "CIRCULAR_INVOCATION");
}
cache.data = result;
if (setListeners) conf.emit("set", "data", null, result);
return result;
};
} else {
memoized = function (arg) {
var result, args = arguments, id;
if (resolve) args = resolve(arguments);
id = String(args[0]);
if (hasOwnProperty.call(cache, id)) {
if (getListeners) conf.emit("get", id, args, this);
return cache[id];
}
if (args.length === 1) result = call.call(original, this, args[0]);
else result = apply.call(original, this, args);
if (hasOwnProperty.call(cache, id)) {
throw customError("Circular invocation", "CIRCULAR_INVOCATION");
}
cache[id] = result;
if (setListeners) conf.emit("set", id, null, result);
return result;
};
}
conf = {
original: original,
memoized: memoized,
profileName: options.profileName,
get: function (args) {
if (resolve) args = resolve(args);
if (get) return get(args);
return String(args[0]);
},
has: function (id) { return hasOwnProperty.call(cache, id); },
delete: function (id) {
var result;
if (!hasOwnProperty.call(cache, id)) return;
if (del) del(id);
result = cache[id];
delete cache[id];
if (deleteListeners) conf.emit("delete", id, result);
},
clear: function () {
var oldCache = cache;
if (clear) clear();
cache = create(null);
conf.emit("clear", oldCache);
},
on: function (type, listener) {
if (type === "get") getListeners = true;
else if (type === "set") setListeners = true;
else if (type === "delete") deleteListeners = true;
return on.call(this, type, listener);
},
emit: emit,
updateEnv: function () { original = conf.original; }
};
if (get) {
extDel = defineLength(function (arg) {
var id, args = arguments;
if (resolve) args = resolve(args);
id = get(args);
if (id === null) return;
conf.delete(id);
}, memLength);
} else if (length === 0) {
extDel = function () { return conf.delete("data"); };
} else {
extDel = function (arg) {
if (resolve) arg = resolve(arguments)[0];
return conf.delete(arg);
};
}
extGet = defineLength(function () {
var id, args = arguments;
if (length === 0) return cache.data;
if (resolve) args = resolve(args);
if (get) id = get(args);
else id = String(args[0]);
return cache[id];
});
extHas = defineLength(function () {
var id, args = arguments;
if (length === 0) return conf.has("data");
if (resolve) args = resolve(args);
if (get) id = get(args);
else id = String(args[0]);
if (id === null) return false;
return conf.has(id);
});
defineProperties(memoized, {
__memoized__: d(true),
delete: d(extDel),
clear: d(conf.clear),
_get: d(extGet),
_has: d(extHas)
});
return conf;
};
Zerion Mini Shell 1.0