@adpt/core
Version:
AdaptJS core library
129 lines • 4.18 kB
JavaScript
;
/*
* Copyright 2018-2019 Unbounded Systems, LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
const tslib_1 = require("tslib");
const debug_1 = tslib_1.__importDefault(require("debug"));
const util = tslib_1.__importStar(require("util"));
const ld = tslib_1.__importStar(require("lodash"));
const utils_1 = require("@adpt/utils");
const error_1 = require("./error");
const jsx_1 = require("./jsx");
const debugState = debug_1.default("adapt:state");
function namespaceToKey(ns) {
return JSON.stringify(ns);
}
function keyToNamespace(key) {
try {
return JSON.parse(key);
}
catch (e) {
if (ld.isError(e)) {
throw new Error("Illegal key: " + e.message);
}
else {
throw new Error("Illegal key");
}
}
}
function createStateStore(json) {
const ret = new StateStoreImpl();
if (json != null) {
const init = JSON.parse(json);
for (const key in init) {
if (!init.hasOwnProperty(key))
continue;
const ns = keyToNamespace(key);
const val = init[key];
if (ld.isObject(val)) {
ret.setElementState(ns, val);
}
else if (init[key] === undefined) {
//Do nothing
}
else {
throw new Error(`Illegal state in store json: ${key} => ${util.inspect(init[key])}`);
}
}
}
return ret;
}
exports.createStateStore = createStateStore;
class StateStoreImpl {
constructor() {
this.states = new Map();
}
setElementState(elem, data) {
const key = namespaceToKey(elem);
if (debugState.enabled) {
const prev = this.states.get(key);
const diff = utils_1.diffObjects(prev, data);
if (diff)
debugState(`State change for ${elem}:\n${diff}`);
}
if (data === undefined) {
this.states.delete(key);
}
else {
this.states.set(key, data);
}
}
elementState(elem) {
return this.states.get(namespaceToKey(elem));
}
serialize() {
const ret = {};
this.states.forEach((elem, key) => {
ret[key] = elem;
});
return JSON.stringify(ret);
}
}
async function applyStateUpdates(path, store, props, updaters) {
if (updaters.length === 0)
return false;
const prev = store.elementState(path);
if (prev === undefined) {
throw new error_1.InternalError(`previous Component state should have been initialized`);
}
let newState = prev;
for (const updater of updaters) {
// Copy current state so updater can't modify newState
// https://github.com/Microsoft/TypeScript/pull/13288
const u = await updater(Object.assign({}, newState), props);
newState = Object.assign({}, newState, u);
}
if (ld.isEqual(prev, newState))
return false;
store.setElementState(path, newState);
return true;
}
exports.applyStateUpdates = applyStateUpdates;
function stateNamespaceForPath(path) {
const elem = ld.last(path);
if (!elem)
return [];
if (!jsx_1.isElementImpl(elem))
throw new Error("Elements must inherit from ElementImpl");
if (jsx_1.isMountedElement(elem)) {
return elem.stateNamespace;
}
else {
throw new Error("Cannot compute state namespace for path with unmounted elements" + util.inspect(path));
}
}
exports.stateNamespaceForPath = stateNamespaceForPath;
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