1 | (function (global, factory) {
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2 | typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
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3 | typeof define === 'function' && define.amd ? define(['exports'], factory) :
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4 | (global = global || self, factory(global.PollingObserver = {}));
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5 | }(this, function (exports) { 'use strict';
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6 |
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7 | |
8 |
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9 |
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10 |
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11 |
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12 |
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13 |
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14 |
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15 |
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16 |
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17 |
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18 |
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19 |
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20 |
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21 |
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22 | function __awaiter(thisArg, _arguments, P, generator) {
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23 | return new (P || (P = Promise))(function (resolve, reject) {
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24 | function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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25 | function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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26 | function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
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27 | step((generator = generator.apply(thisArg, _arguments || [])).next());
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28 | });
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29 | }
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30 |
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31 | function __generator(thisArg, body) {
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32 | var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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33 | return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
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34 | function verb(n) { return function (v) { return step([n, v]); }; }
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35 | function step(op) {
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36 | if (f) throw new TypeError("Generator is already executing.");
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37 | while (_) try {
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38 | if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
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39 | if (y = 0, t) op = [op[0] & 2, t.value];
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40 | switch (op[0]) {
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41 | case 0: case 1: t = op; break;
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42 | case 4: _.label++; return { value: op[1], done: false };
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43 | case 5: _.label++; y = op[1]; op = [0]; continue;
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44 | case 7: op = _.ops.pop(); _.trys.pop(); continue;
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45 | default:
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46 | if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
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47 | if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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48 | if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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49 | if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
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50 | if (t[2]) _.ops.pop();
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51 | _.trys.pop(); continue;
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52 | }
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53 | op = body.call(thisArg, _);
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54 | } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
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55 | if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
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56 | }
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57 | }
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58 |
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59 | function delayUntil(delay) {
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60 | if (delay === void 0) { delay = 0; }
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61 | return __awaiter(this, void 0, void 0, function () {
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62 | return __generator(this, function (_a) {
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63 | return [2, new Promise(function (yay) {
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64 | var delayNum = 'number' === typeof (delay) ? +delay : 0;
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65 | if (delayNum < 1)
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66 | yay();
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67 | else
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68 | setTimeout(yay, delay);
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69 | })];
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70 | });
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71 | });
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72 | }
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73 |
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74 | function globalPerformance() {
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75 | return __awaiter(this, void 0, void 0, function () {
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76 | return __generator(this, function (_a) {
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77 | return [2, ('undefined' !== typeof (window) ? window : global).performance];
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78 | });
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79 | });
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80 | }
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81 |
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82 | var PollingMeasure = (function () {
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83 | function PollingMeasure(name, duration, startTime) {
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84 | this.name = name;
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85 | this.duration = duration;
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86 | this.startTime = startTime;
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87 | this.entryType = 'polling-measure';
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88 | }
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89 | PollingMeasure.prototype.toJSON = function () {
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90 | return {
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91 | duration: this.duration,
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92 | entryType: this.entryType,
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93 | name: this.name,
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94 | startTime: this.startTime,
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95 | };
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96 | };
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97 | return PollingMeasure;
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98 | }());
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99 |
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100 | function isPromise(r) {
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101 | return 'function' === typeof (r.then);
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102 | }
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103 | var PollingObserver = (function () {
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104 | function PollingObserver(conditionCallback) {
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105 | this.conditionCallback = conditionCallback;
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106 | this._forceStop = false;
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107 | this._records = [];
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108 | this._isPolling = false;
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109 | if ('function' !== typeof (conditionCallback)) {
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110 | throw new TypeError("'conditionCallback' is not defined");
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111 | }
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112 | }
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113 | PollingObserver.prototype.disconnect = function () {
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114 | this._forceStop = true;
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115 | if (!this._isPolling)
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116 | this._records = [];
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117 | };
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118 | PollingObserver.prototype.observe = function (callback, options) {
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119 | return __awaiter(this, void 0, void 0, function () {
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120 | var _a, interval, timeout, isValidInterval, obsTimeout, obsInterval, perf, isInfinitePolling, records, onfinishCallback, conditionCallback, totalTime, value, i, status, result, conditionResult, didConditionMeet, _b, didTimeout, startAt, r, _c, endAt, duration, timeLeft, e_1, recordsSlice;
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121 | return __generator(this, function (_d) {
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122 | switch (_d.label) {
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123 | case 0:
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124 | this._forceStop = false;
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125 | _a = options || {}, interval = _a.interval, timeout = _a.timeout;
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126 | isValidInterval = 'number' === typeof (interval) && interval > 0;
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127 | obsTimeout = 'number' === typeof (timeout) ? +timeout : -1;
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128 | obsInterval = isValidInterval ? +interval : -1;
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129 | return [4, globalPerformance()];
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130 | case 1:
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131 | perf = _d.sent();
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132 | isInfinitePolling = obsTimeout < 1;
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133 | records = this._records;
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134 | onfinishCallback = this.onfinish;
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135 | conditionCallback = this.conditionCallback;
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136 | totalTime = 0;
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137 | value = void 0;
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138 | i = 0;
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139 | status = 'finish';
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140 | result = {};
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141 | _d.label = 2;
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142 | case 2:
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143 | _d.trys.push([2, 13, 14, 15]);
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144 | _d.label = 3;
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145 | case 3:
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146 | if (this._forceStop)
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147 | return [3, 12];
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148 | this._isPolling = true;
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149 | conditionResult = conditionCallback(value, records, this);
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150 | if (!isPromise(conditionResult)) return [3, 5];
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151 | return [4, conditionResult];
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152 | case 4:
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153 | _b = _d.sent();
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154 | return [3, 6];
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155 | case 5:
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156 | _b = conditionResult;
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157 | _d.label = 6;
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158 | case 6:
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159 | didConditionMeet = _b;
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160 | didTimeout = isInfinitePolling ? false : totalTime >= obsTimeout;
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161 | if (didTimeout || didConditionMeet) {
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162 | status = didTimeout ? 'timeout' : status;
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163 | return [3, 12];
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164 | }
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165 | startAt = perf.now();
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166 | r = callback();
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167 | if (!isPromise(r)) return [3, 8];
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168 | return [4, r];
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169 | case 7:
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170 | _c = _d.sent();
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171 | return [3, 9];
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172 | case 8:
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173 | _c = r;
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174 | _d.label = 9;
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175 | case 9:
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176 | value = _c;
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177 | endAt = perf.now();
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178 | duration = endAt - startAt;
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179 | timeLeft = isValidInterval ? obsInterval - duration : 0;
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180 | records.push(new PollingMeasure("polling:" + i, duration, startAt));
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181 | totalTime += (duration > obsInterval ? duration : obsInterval);
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182 | i += 1;
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183 | if (!(timeLeft > 0)) return [3, 11];
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184 | return [4, delayUntil(timeLeft)];
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185 | case 10:
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186 | _d.sent();
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187 | _d.label = 11;
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188 | case 11: return [3, 3];
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189 | case 12:
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190 | result = { status: status, value: value };
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191 | return [3, 15];
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192 | case 13:
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193 | e_1 = _d.sent();
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194 | result = { status: 'error', reason: e_1 };
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195 | return [3, 15];
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196 | case 14:
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197 | recordsSlice = records.slice();
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198 | if (this._forceStop)
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199 | this._records = [];
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200 | this._isPolling = this._forceStop = false;
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201 | if ('function' === typeof (onfinishCallback)) {
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202 | onfinishCallback(result, recordsSlice, this);
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203 | }
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204 | return [7];
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205 | case 15: return [2];
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206 | }
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207 | });
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208 | });
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209 | };
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210 | PollingObserver.prototype.takeRecords = function () {
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211 | return this._records;
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212 | };
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213 | return PollingObserver;
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214 | }());
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215 |
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216 | exports.PollingObserver = PollingObserver;
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217 | exports.default = PollingObserver;
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218 |
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219 | Object.defineProperty(exports, '__esModule', { value: true });
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220 |
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221 | }));
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222 |
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