graphql-subscriptions
Version:
GraphQL subscriptions for node.js
160 lines • 7.66 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (g && (g = 0, op[0] && (_ = 0)), _) try {
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;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.PubSubAsyncIterableIterator = void 0;
var PubSubAsyncIterableIterator = (function () {
function PubSubAsyncIterableIterator(pubsub, eventNames) {
this.pubsub = pubsub;
this.pullQueue = [];
this.pushQueue = [];
this.running = true;
this.allSubscribed = null;
this.eventsArray = typeof eventNames === 'string' ? [eventNames] : eventNames;
}
PubSubAsyncIterableIterator.prototype.next = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!!this.allSubscribed) return [3, 2];
return [4, (this.allSubscribed = this.subscribeAll())];
case 1:
_a.sent();
_a.label = 2;
case 2: return [2, this.pullValue()];
}
});
});
};
PubSubAsyncIterableIterator.prototype.return = function () {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4, this.emptyQueue()];
case 1:
_a.sent();
return [2, { value: undefined, done: true }];
}
});
});
};
PubSubAsyncIterableIterator.prototype.throw = function (error) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4, this.emptyQueue()];
case 1:
_a.sent();
return [2, Promise.reject(error)];
}
});
});
};
PubSubAsyncIterableIterator.prototype[Symbol.asyncIterator] = function () {
return this;
};
PubSubAsyncIterableIterator.prototype.pushValue = function (event) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4, this.allSubscribed];
case 1:
_a.sent();
if (this.pullQueue.length !== 0) {
this.pullQueue.shift()(this.running
? { value: event, done: false }
: { value: undefined, done: true });
}
else {
this.pushQueue.push(event);
}
return [2];
}
});
});
};
PubSubAsyncIterableIterator.prototype.pullValue = function () {
var _this = this;
return new Promise(function (resolve) {
if (_this.pushQueue.length !== 0) {
resolve(_this.running
? { value: _this.pushQueue.shift(), done: false }
: { value: undefined, done: true });
}
else {
_this.pullQueue.push(resolve);
}
});
};
PubSubAsyncIterableIterator.prototype.emptyQueue = function () {
return __awaiter(this, void 0, void 0, function () {
var subscriptionIds;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!this.running) return [3, 2];
this.running = false;
this.pullQueue.forEach(function (resolve) { return resolve({ value: undefined, done: true }); });
this.pullQueue.length = 0;
this.pushQueue.length = 0;
return [4, this.allSubscribed];
case 1:
subscriptionIds = _a.sent();
if (subscriptionIds) {
this.unsubscribeAll(subscriptionIds);
}
_a.label = 2;
case 2: return [2];
}
});
});
};
PubSubAsyncIterableIterator.prototype.subscribeAll = function () {
var _this = this;
return Promise.all(this.eventsArray.map(function (eventName) { return _this.pubsub.subscribe(eventName, _this.pushValue.bind(_this), {}); }));
};
PubSubAsyncIterableIterator.prototype.unsubscribeAll = function (subscriptionIds) {
for (var _i = 0, subscriptionIds_1 = subscriptionIds; _i < subscriptionIds_1.length; _i++) {
var subscriptionId = subscriptionIds_1[_i];
this.pubsub.unsubscribe(subscriptionId);
}
};
return PubSubAsyncIterableIterator;
}());
exports.PubSubAsyncIterableIterator = PubSubAsyncIterableIterator;
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