Files
30-seconds-of-code/node_modules/xstate/lib/utils.js
2019-08-20 15:52:05 +02:00

532 lines
16 KiB
JavaScript

"use strict";
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
var __values = (this && this.__values) || function (o) {
var m = typeof Symbol === "function" && o[Symbol.iterator], i = 0;
if (m) return m.call(o);
return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
};
var __read = (this && this.__read) || function (o, n) {
var m = typeof Symbol === "function" && o[Symbol.iterator];
if (!m) return o;
var i = m.call(o), r, ar = [], e;
try {
while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
}
catch (error) { e = { error: error }; }
finally {
try {
if (r && !r.done && (m = i["return"])) m.call(i);
}
finally { if (e) throw e.error; }
}
return ar;
};
var __spread = (this && this.__spread) || function () {
for (var ar = [], i = 0; i < arguments.length; i++) ar = ar.concat(__read(arguments[i]));
return ar;
};
Object.defineProperty(exports, "__esModule", { value: true });
var types_1 = require("./types");
var constants_1 = require("./constants");
var environment_1 = require("./environment");
function isState(state) {
if (isString(state)) {
return false;
}
return 'value' in state && 'tree' in state && 'history' in state;
}
function keys(value) {
return Object.keys(value);
}
exports.keys = keys;
function matchesState(parentStateId, childStateId, delimiter) {
if (delimiter === void 0) { delimiter = constants_1.STATE_DELIMITER; }
var parentStateValue = toStateValue(parentStateId, delimiter);
var childStateValue = toStateValue(childStateId, delimiter);
if (isString(childStateValue)) {
if (isString(parentStateValue)) {
return childStateValue === parentStateValue;
}
// Parent more specific than child
return false;
}
if (isString(parentStateValue)) {
return parentStateValue in childStateValue;
}
return keys(parentStateValue).every(function (key) {
if (!(key in childStateValue)) {
return false;
}
return matchesState(parentStateValue[key], childStateValue[key]);
});
}
exports.matchesState = matchesState;
function getEventType(event) {
try {
return isString(event) || typeof event === 'number'
? "" + event
: event.type;
}
catch (e) {
throw new Error('Events must be strings or objects with a string event.type property.');
}
}
exports.getEventType = getEventType;
function getActionType(action) {
try {
return isString(action) || typeof action === 'number'
? "" + action
: isFunction(action)
? action.name
: action.type;
}
catch (e) {
throw new Error('Actions must be strings or objects with a string action.type property.');
}
}
exports.getActionType = getActionType;
function toStatePath(stateId, delimiter) {
try {
if (isArray(stateId)) {
return stateId;
}
return stateId.toString().split(delimiter);
}
catch (e) {
throw new Error("'" + stateId + "' is not a valid state path.");
}
}
exports.toStatePath = toStatePath;
function toStateValue(stateValue, delimiter) {
if (isState(stateValue)) {
return stateValue.value;
}
if (isArray(stateValue)) {
return pathToStateValue(stateValue);
}
if (typeof stateValue !== 'string' && !isState(stateValue)) {
return stateValue;
}
var statePath = toStatePath(stateValue, delimiter);
return pathToStateValue(statePath);
}
exports.toStateValue = toStateValue;
function pathToStateValue(statePath) {
if (statePath.length === 1) {
return statePath[0];
}
var value = {};
var marker = value;
for (var i = 0; i < statePath.length - 1; i++) {
if (i === statePath.length - 2) {
marker[statePath[i]] = statePath[i + 1];
}
else {
marker[statePath[i]] = {};
marker = marker[statePath[i]];
}
}
return value;
}
exports.pathToStateValue = pathToStateValue;
function mapValues(collection, iteratee) {
var result = {};
var collectionKeys = keys(collection);
for (var i = 0; i < collectionKeys.length; i++) {
var key = collectionKeys[i];
result[key] = iteratee(collection[key], key, collection, i);
}
return result;
}
exports.mapValues = mapValues;
function mapFilterValues(collection, iteratee, predicate) {
var e_1, _a;
var result = {};
try {
for (var _b = __values(keys(collection)), _c = _b.next(); !_c.done; _c = _b.next()) {
var key = _c.value;
var item = collection[key];
if (!predicate(item)) {
continue;
}
result[key] = iteratee(item, key, collection);
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_1) throw e_1.error; }
}
return result;
}
exports.mapFilterValues = mapFilterValues;
/**
* Retrieves a value at the given path.
* @param props The deep path to the prop of the desired value
*/
exports.path = function (props) { return function (object) {
var e_2, _a;
var result = object;
try {
for (var props_1 = __values(props), props_1_1 = props_1.next(); !props_1_1.done; props_1_1 = props_1.next()) {
var prop = props_1_1.value;
result = result[prop];
}
}
catch (e_2_1) { e_2 = { error: e_2_1 }; }
finally {
try {
if (props_1_1 && !props_1_1.done && (_a = props_1.return)) _a.call(props_1);
}
finally { if (e_2) throw e_2.error; }
}
return result;
}; };
/**
* Retrieves a value at the given path via the nested accessor prop.
* @param props The deep path to the prop of the desired value
*/
function nestedPath(props, accessorProp) {
return function (object) {
var e_3, _a;
var result = object;
try {
for (var props_2 = __values(props), props_2_1 = props_2.next(); !props_2_1.done; props_2_1 = props_2.next()) {
var prop = props_2_1.value;
result = result[accessorProp][prop];
}
}
catch (e_3_1) { e_3 = { error: e_3_1 }; }
finally {
try {
if (props_2_1 && !props_2_1.done && (_a = props_2.return)) _a.call(props_2);
}
finally { if (e_3) throw e_3.error; }
}
return result;
};
}
exports.nestedPath = nestedPath;
function toStatePaths(stateValue) {
if (!stateValue) {
return [[]];
}
if (isString(stateValue)) {
return [[stateValue]];
}
var result = flatten(keys(stateValue).map(function (key) {
var subStateValue = stateValue[key];
if (typeof subStateValue !== 'string' &&
(!subStateValue || !Object.keys(subStateValue).length)) {
return [[key]];
}
return toStatePaths(stateValue[key]).map(function (subPath) {
return [key].concat(subPath);
});
}));
return result;
}
exports.toStatePaths = toStatePaths;
exports.pathsToStateValue = function (paths) {
var e_4, _a;
var result = {};
if (paths && paths.length === 1 && paths[0].length === 1) {
return paths[0][0];
}
try {
for (var paths_1 = __values(paths), paths_1_1 = paths_1.next(); !paths_1_1.done; paths_1_1 = paths_1.next()) {
var currentPath = paths_1_1.value;
var marker = result;
// tslint:disable-next-line:prefer-for-of
for (var i = 0; i < currentPath.length; i++) {
var subPath = currentPath[i];
if (i === currentPath.length - 2) {
marker[subPath] = currentPath[i + 1];
break;
}
marker[subPath] = marker[subPath] || {};
marker = marker[subPath];
}
}
}
catch (e_4_1) { e_4 = { error: e_4_1 }; }
finally {
try {
if (paths_1_1 && !paths_1_1.done && (_a = paths_1.return)) _a.call(paths_1);
}
finally { if (e_4) throw e_4.error; }
}
return result;
};
function flatten(array) {
var _a;
return (_a = []).concat.apply(_a, __spread(array));
}
exports.flatten = flatten;
function toArray(value) {
if (isArray(value)) {
return value;
}
if (value === undefined) {
return [];
}
return [value];
}
exports.toArray = toArray;
function mapContext(mapper, context, event) {
var e_5, _a;
if (isFunction(mapper)) {
return mapper(context, event);
}
var result = {};
try {
for (var _b = __values(keys(mapper)), _c = _b.next(); !_c.done; _c = _b.next()) {
var key = _c.value;
var subMapper = mapper[key];
if (isFunction(subMapper)) {
result[key] = subMapper(context, event);
}
else {
result[key] = subMapper;
}
}
}
catch (e_5_1) { e_5 = { error: e_5_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_5) throw e_5.error; }
}
return result;
}
exports.mapContext = mapContext;
function isBuiltInEvent(eventType) {
// check if event is a "done" event
if (eventType.indexOf(types_1.ActionTypes.DoneState) === 0 ||
eventType.indexOf(types_1.ActionTypes.DoneInvoke) === 0) {
return true;
}
// check if event is an "error" event
if (eventType === types_1.ActionTypes.ErrorCommunication ||
eventType === types_1.ActionTypes.ErrorExecution ||
eventType.indexOf(types_1.ActionTypes.ErrorPlatform) === 0) {
return true;
}
return false;
}
exports.isBuiltInEvent = isBuiltInEvent;
function isPromiseLike(value) {
if (value instanceof Promise) {
return true;
}
// Check if shape matches the Promise/A+ specification for a "thenable".
if (value !== null &&
(isFunction(value) || typeof value === 'object') &&
isFunction(value.then)) {
return true;
}
return false;
}
exports.isPromiseLike = isPromiseLike;
function partition(items, predicate) {
var e_6, _a;
var _b = __read([[], []], 2), truthy = _b[0], falsy = _b[1];
try {
for (var items_1 = __values(items), items_1_1 = items_1.next(); !items_1_1.done; items_1_1 = items_1.next()) {
var item = items_1_1.value;
if (predicate(item)) {
truthy.push(item);
}
else {
falsy.push(item);
}
}
}
catch (e_6_1) { e_6 = { error: e_6_1 }; }
finally {
try {
if (items_1_1 && !items_1_1.done && (_a = items_1.return)) _a.call(items_1);
}
finally { if (e_6) throw e_6.error; }
}
return [truthy, falsy];
}
exports.partition = partition;
function updateHistoryStates(hist, stateValue) {
return mapValues(hist.states, function (subHist, key) {
if (!subHist) {
return undefined;
}
var subStateValue = (isString(stateValue) ? undefined : stateValue[key]) ||
(subHist ? subHist.current : undefined);
if (!subStateValue) {
return undefined;
}
return {
current: subStateValue,
states: updateHistoryStates(subHist, subStateValue)
};
});
}
exports.updateHistoryStates = updateHistoryStates;
function updateHistoryValue(hist, stateValue) {
return {
current: stateValue,
states: updateHistoryStates(hist, stateValue)
};
}
exports.updateHistoryValue = updateHistoryValue;
function updateContext(context, event, assignActions) {
var updatedContext = context
? assignActions.reduce(function (acc, assignAction) {
var e_7, _a;
var assignment = assignAction.assignment;
var partialUpdate = {};
if (isFunction(assignment)) {
partialUpdate = assignment(acc, event || { type: types_1.ActionTypes.Init });
}
else {
try {
for (var _b = __values(keys(assignment)), _c = _b.next(); !_c.done; _c = _b.next()) {
var key = _c.value;
var propAssignment = assignment[key];
partialUpdate[key] = isFunction(propAssignment)
? propAssignment(acc, event)
: propAssignment;
}
}
catch (e_7_1) { e_7 = { error: e_7_1 }; }
finally {
try {
if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
}
finally { if (e_7) throw e_7.error; }
}
}
return Object.assign({}, acc, partialUpdate);
}, context)
: context;
return updatedContext;
}
exports.updateContext = updateContext;
function bindActionToState(action, state) {
var exec = action.exec;
var boundAction = __assign({}, action, { exec: exec !== undefined
? function () {
return exec(state.context, state.event, {
action: action,
state: state
});
}
: undefined });
return boundAction;
}
exports.bindActionToState = bindActionToState;
// tslint:disable-next-line:no-empty
var warn = function () { };
exports.warn = warn;
if (!environment_1.IS_PRODUCTION) {
exports.warn = warn = function (condition, message) {
var error = condition instanceof Error ? condition : undefined;
if (!error && condition) {
return;
}
if (console !== undefined) {
var args = ["Warning: " + message];
if (error) {
args.push(error);
}
// tslint:disable-next-line:no-console
console.warn.apply(console, args);
}
};
}
function isArray(value) {
return Array.isArray(value);
}
exports.isArray = isArray;
// tslint:disable-next-line:ban-types
function isFunction(value) {
return typeof value === 'function';
}
exports.isFunction = isFunction;
function isString(value) {
return typeof value === 'string';
}
exports.isString = isString;
// export function memoizedGetter<T, TP extends { prototype: object }>(
// o: TP,
// property: string,
// getter: () => T
// ): void {
// Object.defineProperty(o.prototype, property, {
// get: getter,
// enumerable: false,
// configurable: false
// });
// }
function toGuard(condition, guardMap) {
if (!condition) {
return undefined;
}
if (isString(condition)) {
return {
type: constants_1.DEFAULT_GUARD_TYPE,
name: condition,
predicate: guardMap ? guardMap[condition] : undefined
};
}
if (isFunction(condition)) {
return {
type: constants_1.DEFAULT_GUARD_TYPE,
name: condition.name,
predicate: condition
};
}
return condition;
}
exports.toGuard = toGuard;
function isObservable(value) {
try {
return 'subscribe' in value && isFunction(value.subscribe);
}
catch (e) {
return false;
}
}
exports.isObservable = isObservable;
function isMachine(value) {
try {
return '__xstatenode' in value;
}
catch (e) {
return false;
}
}
exports.isMachine = isMachine;
exports.uniqueId = (function () {
var currentId = 0;
return function () {
currentId++;
return currentId.toString(16);
};
})();
//# sourceMappingURL=utils.js.map