351 lines
15 KiB
JavaScript
Executable File
351 lines
15 KiB
JavaScript
Executable File
"use strict";
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var __assign = (this && this.__assign) || function () {
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__assign = Object.assign || function(t) {
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for (var s, i = 1, n = arguments.length; i < n; i++) {
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s = arguments[i];
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for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
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t[p] = s[p];
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}
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return t;
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};
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return __assign.apply(this, arguments);
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};
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var __read = (this && this.__read) || function (o, n) {
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var m = typeof Symbol === "function" && o[Symbol.iterator];
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if (!m) return o;
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var i = m.call(o), r, ar = [], e;
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try {
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while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
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}
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catch (error) { e = { error: error }; }
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finally {
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try {
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if (r && !r.done && (m = i["return"])) m.call(i);
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}
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finally { if (e) throw e.error; }
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}
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return ar;
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};
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var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
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if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
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if (ar || !(i in from)) {
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if (!ar) ar = Array.prototype.slice.call(from, 0, i);
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ar[i] = from[i];
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}
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}
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return to.concat(ar || Array.prototype.slice.call(from));
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};
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var __values = (this && this.__values) || function(o) {
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var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
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if (m) return m.call(o);
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if (o && typeof o.length === "number") return {
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next: function () {
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if (o && i >= o.length) o = void 0;
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return { value: o && o[i++], done: !o };
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}
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};
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throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.toMachine = void 0;
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var xml_js_1 = require("xml-js");
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var index_1 = require("./index");
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var utils_1 = require("./utils");
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var actions = require("./actions");
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function getAttribute(element, attribute) {
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return element.attributes ? element.attributes[attribute] : undefined;
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}
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function indexedRecord(items, identifier) {
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var record = {};
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var identifierFn = (0, utils_1.isString)(identifier)
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? function (item) { return item[identifier]; }
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: identifier;
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items.forEach(function (item) {
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var key = identifierFn(item);
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record[key] = item;
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});
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return record;
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}
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function executableContent(elements) {
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var transition = {
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actions: mapActions(elements)
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};
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return transition;
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}
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function getTargets(targetAttr) {
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// return targetAttr ? [`#${targetAttr}`] : undefined;
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return targetAttr
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? "".concat(targetAttr).split(/\s+/).map(function (target) { return "#".concat(target); })
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: undefined;
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}
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function delayToMs(delay) {
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if (!delay) {
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return undefined;
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}
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if (typeof delay === 'number') {
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return delay;
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}
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var millisecondsMatch = delay.match(/(\d+)ms/);
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if (millisecondsMatch) {
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return parseInt(millisecondsMatch[1], 10);
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}
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var secondsMatch = delay.match(/(\d*)(\.?)(\d+)s/);
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if (secondsMatch) {
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var hasDecimal = !!secondsMatch[2];
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if (!hasDecimal) {
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return parseInt(secondsMatch[3], 10) * 1000;
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}
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var secondsPart = !!secondsMatch[1]
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? parseInt(secondsMatch[1], 10) * 1000
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: 0;
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var millisecondsPart = parseInt(secondsMatch[3].padEnd(3, '0'), 10);
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if (millisecondsPart >= 1000) {
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throw new Error("Can't parse \"".concat(delay, " delay.\""));
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}
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return secondsPart + millisecondsPart;
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}
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throw new Error("Can't parse \"".concat(delay, " delay.\""));
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}
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var evaluateExecutableContent = function (context, _ev, meta, body) {
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var datamodel = context
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? Object.keys(context)
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.map(function (key) { return "const ".concat(key, " = context['").concat(key, "'];"); })
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.join('\n')
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: '';
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var scope = ['const _sessionid = "NOT_IMPLEMENTED";', datamodel]
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.filter(Boolean)
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.join('\n');
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var args = ['context', '_event'];
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var fnBody = "\n ".concat(scope, "\n ").concat(body, "\n ");
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var fn = new (Function.bind.apply(Function, __spreadArray(__spreadArray([void 0], __read(args), false), [fnBody], false)))();
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return fn(context, meta._event);
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};
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function createCond(cond) {
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return function (context, _event, meta) {
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return evaluateExecutableContent(context, _event, meta, "return ".concat(cond, ";"));
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};
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}
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function mapAction(element) {
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var e_1, _a;
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switch (element.name) {
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case 'raise': {
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return actions.raise(element.attributes.event);
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}
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case 'assign': {
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return actions.assign(function (context, e, meta) {
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var fnBody = "\n return {'".concat(element.attributes.location, "': ").concat(element.attributes.expr, "};\n ");
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return evaluateExecutableContent(context, e, meta, fnBody);
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});
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}
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case 'send': {
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var _b = element.attributes, event_1 = _b.event, eventexpr_1 = _b.eventexpr, target = _b.target;
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var convertedEvent = void 0;
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var convertedDelay = void 0;
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var params_1 = element.elements &&
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element.elements.reduce(function (acc, child) {
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if (child.name === 'content') {
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throw new Error('Conversion of <content/> inside <send/> not implemented.');
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}
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return "".concat(acc).concat(child.attributes.name, ":").concat(child.attributes.expr, ",\n");
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}, '');
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if (event_1 && !params_1) {
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convertedEvent = event_1;
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}
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else {
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convertedEvent = function (context, _ev, meta) {
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var fnBody = "\n return { type: ".concat(event_1 ? "\"".concat(event_1, "\"") : eventexpr_1, ", ").concat(params_1 ? params_1 : '', " }\n ");
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return evaluateExecutableContent(context, _ev, meta, fnBody);
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};
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}
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if ('delay' in element.attributes) {
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convertedDelay = delayToMs(element.attributes.delay);
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}
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else if (element.attributes.delayexpr) {
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convertedDelay = function (context, _ev, meta) {
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var fnBody = "\n return (".concat(delayToMs, ")(").concat(element.attributes.delayexpr, ");\n ");
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return evaluateExecutableContent(context, _ev, meta, fnBody);
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};
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}
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return actions.send(convertedEvent, {
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delay: convertedDelay,
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to: target
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});
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}
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case 'log': {
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var label = element.attributes.label;
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return actions.log(function (context, e, meta) {
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var fnBody = "\n return ".concat(element.attributes.expr, ";\n ");
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return evaluateExecutableContent(context, e, meta, fnBody);
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}, label !== undefined ? String(label) : undefined);
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}
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case 'if': {
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var conds = [];
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var current = {
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cond: createCond(element.attributes.cond),
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actions: []
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};
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try {
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for (var _c = __values(element.elements), _d = _c.next(); !_d.done; _d = _c.next()) {
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var el = _d.value;
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if (el.type === 'comment') {
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continue;
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}
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switch (el.name) {
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case 'elseif':
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conds.push(current);
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current = {
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cond: createCond(el.attributes.cond),
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actions: []
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};
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break;
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case 'else':
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conds.push(current);
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current = { actions: [] };
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break;
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default:
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current.actions.push(mapAction(el));
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break;
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}
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}
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}
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catch (e_1_1) { e_1 = { error: e_1_1 }; }
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finally {
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try {
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if (_d && !_d.done && (_a = _c.return)) _a.call(_c);
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}
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finally { if (e_1) throw e_1.error; }
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}
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conds.push(current);
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return actions.choose(conds);
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}
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default:
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throw new Error("Conversion of \"".concat(element.name, "\" elements is not implemented yet."));
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}
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}
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function mapActions(elements) {
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var e_2, _a;
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var mapped = [];
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try {
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for (var elements_1 = __values(elements), elements_1_1 = elements_1.next(); !elements_1_1.done; elements_1_1 = elements_1.next()) {
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var element = elements_1_1.value;
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if (element.type === 'comment') {
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continue;
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}
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mapped.push(mapAction(element));
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}
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}
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catch (e_2_1) { e_2 = { error: e_2_1 }; }
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finally {
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try {
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if (elements_1_1 && !elements_1_1.done && (_a = elements_1.return)) _a.call(elements_1);
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}
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finally { if (e_2) throw e_2.error; }
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}
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return mapped;
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}
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function toConfig(nodeJson, id, options) {
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var parallel = nodeJson.name === 'parallel';
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var initial = parallel ? undefined : nodeJson.attributes.initial;
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var elements = nodeJson.elements;
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switch (nodeJson.name) {
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case 'history': {
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if (!elements) {
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return {
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id: id,
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history: nodeJson.attributes.type || 'shallow'
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};
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}
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var _a = __read(elements.filter(function (element) { return element.name === 'transition'; }), 1), transitionElement = _a[0];
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var target = getAttribute(transitionElement, 'target');
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var history_1 = getAttribute(nodeJson, 'type') || 'shallow';
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return {
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id: id,
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history: history_1,
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target: target ? "#".concat(target) : undefined
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};
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}
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case 'final': {
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return __assign(__assign({}, nodeJson.attributes), { type: 'final' });
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}
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default:
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break;
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}
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if (nodeJson.elements) {
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var stateElements = nodeJson.elements.filter(function (element) {
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return element.name === 'state' ||
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element.name === 'parallel' ||
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element.name === 'final' ||
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element.name === 'history';
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});
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var transitionElements = nodeJson.elements.filter(function (element) { return element.name === 'transition'; });
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var invokeElements = nodeJson.elements.filter(function (element) { return element.name === 'invoke'; });
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var onEntryElement = nodeJson.elements.find(function (element) { return element.name === 'onentry'; });
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var onExitElement = nodeJson.elements.find(function (element) { return element.name === 'onexit'; });
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var states = indexedRecord(stateElements, function (item) { return "".concat(item.attributes.id); });
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var initialElement = !initial
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? nodeJson.elements.find(function (element) { return element.name === 'initial'; })
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: undefined;
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if (initialElement && initialElement.elements.length) {
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initial = initialElement.elements.find(function (element) { return element.name === 'transition'; }).attributes.target;
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}
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else if (!initialElement && stateElements.length) {
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initial = stateElements[0].attributes.id;
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}
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var on = transitionElements.map(function (value) {
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var event = getAttribute(value, 'event') || '';
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var targets = getAttribute(value, 'target');
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var internal = getAttribute(value, 'type') === 'internal';
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return __assign(__assign(__assign({ event: event, target: getTargets(targets) }, (value.elements ? executableContent(value.elements) : undefined)), (value.attributes && value.attributes.cond
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? {
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cond: createCond(value.attributes.cond)
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}
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: undefined)), { internal: internal });
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});
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var onEntry = onEntryElement
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? mapActions(onEntryElement.elements)
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: undefined;
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var onExit = onExitElement
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? mapActions(onExitElement.elements)
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: undefined;
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var invoke = invokeElements.map(function (element) {
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if (!['scxml', 'http://www.w3.org/TR/scxml/'].includes(element.attributes.type)) {
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throw new Error('Currently only converting invoke elements of type SCXML is supported.');
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}
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var content = element.elements.find(function (el) { return el.name === 'content'; });
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return scxmlToMachine(content, options);
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});
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return __assign(__assign(__assign(__assign(__assign(__assign(__assign({ id: id }, (initial ? { initial: initial } : undefined)), (parallel ? { type: 'parallel' } : undefined)), (stateElements.length
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? {
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states: (0, utils_1.mapValues)(states, function (state, key) {
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return toConfig(state, key, options);
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})
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}
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: undefined)), (transitionElements.length ? { on: on } : undefined)), (onEntry ? { onEntry: onEntry } : undefined)), (onExit ? { onExit: onExit } : undefined)), (invoke.length ? { invoke: invoke } : undefined));
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}
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return { id: id };
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}
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function scxmlToMachine(scxmlJson, options) {
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var machineElement = scxmlJson.elements.find(function (element) { return element.name === 'scxml'; });
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var dataModelEl = machineElement.elements.filter(function (element) { return element.name === 'datamodel'; })[0];
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var extState = dataModelEl
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? dataModelEl
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.elements.filter(function (element) { return element.name === 'data'; })
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.reduce(function (acc, element) {
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if (element.attributes.src) {
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throw new Error("Conversion of `src` attribute on datamodel's <data> elements is not supported.");
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}
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acc[element.attributes.id] = element.attributes.expr
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? // tslint:disable-next-line:no-eval
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eval("(".concat(element.attributes.expr, ")"))
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: undefined;
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return acc;
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}, {})
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: undefined;
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return (0, index_1.Machine)(__assign(__assign({}, toConfig(machineElement, '(machine)', options)), { context: extState, delimiter: options.delimiter }));
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}
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function toMachine(xml, options) {
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var json = (0, xml_js_1.xml2js)(xml);
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return scxmlToMachine(json, options);
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}
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exports.toMachine = toMachine;
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