listener-rss
Version:
A lightweight library to create a listener from a rss feed.
182 lines (181 loc) • 8.42 kB
JavaScript
"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
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 (_) 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 };
}
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ListenerRss = void 0;
var rss_parser_1 = __importDefault(require("rss-parser"));
var events_1 = __importDefault(require("events"));
var DEFAULT_TIMELOOP = 5 * 60; // default timeloop is 5 min
/**
* Emit 'update' when he's making a fetch during the start fun
* Emit 'error' when the fetch has an issue
* Emit 'newEntries' when the fetch has new entris
*/
var ListenerRss = /** @class */ (function (_super) {
__extends(ListenerRss, _super);
/**
* @brief constructor
* @param config ListenerRSSInfos interface who contains the ListenerInfos
*/
function ListenerRss(config) {
var _this = _super.call(this) || this;
_this.address = "";
_this.timeloop = DEFAULT_TIMELOOP; // time in seconds
_this.loopRunning = false;
_this.lastEntriesLinks = [];
_this.firstUpdate = true;
_this.address = config.address;
_this.timeloop =
config.timeloop === undefined ? DEFAULT_TIMELOOP : config.timeloop;
_this.customfields = config.customfields;
_this.lastEntriesLinks =
config.lastEntriesLinks === undefined ? [] : config.lastEntriesLinks;
_this.parser = _this.generateParser();
return _this;
}
/**
* @brief Private function. Is used to initilize the parser object with the customfields var
*/
ListenerRss.prototype.generateParser = function () {
var parserConfig = this.customfields && {
customFields: {
feed: [],
item: Object.entries(this.customfields).map(function (_a) {
var value = _a[1];
return Array.isArray(value) ? value[0] : value;
}),
},
};
return new rss_parser_1.default(parserConfig);
};
/**
* @brief use the parseURL function from rss-parser with the objects data
* @return return a promise with the received data
*/
ListenerRss.prototype.fetchRSS = function () {
return this.parser.parseURL(this.address);
};
/**
* @brief call the callback function each looptime
*/
ListenerRss.prototype.start = function () {
var _this = this;
if (this.loopRunning)
return;
this.loopRunning = true;
var fun = function () { return __awaiter(_this, void 0, void 0, function () {
var _a, _b;
var _this = this;
return __generator(this, function (_c) {
switch (_c.label) {
case 0:
_b = (_a = Promise).resolve;
return [4 /*yield*/, this.fetchRSS()
.then(function (obj) {
_this.emit("update", obj);
var updatedEntriesLinks = obj.items.map(function (item) { return item.link; });
var newEntries = obj.items.filter(function (item) {
return !_this.lastEntriesLinks.includes(item.link);
});
_this.lastEntriesLinks = updatedEntriesLinks;
if (!_this.firstUpdate && newEntries.length !== 0)
_this.emit("newEntries", newEntries);
_this.firstUpdate = false;
})
.catch(function (err) { return _this.emit("error", err); })];
case 1: return [4 /*yield*/, _b.apply(_a, [_c.sent()])];
case 2:
_c.sent();
return [2 /*return*/];
}
});
}); };
(function () { return __awaiter(_this, void 0, void 0, function () {
var _this = this;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (!this.loopRunning) return [3 /*break*/, 3];
return [4 /*yield*/, fun()];
case 1:
_a.sent();
return [4 /*yield*/, new Promise(function (res) { return setTimeout(res, _this.timeloop * 1000); })];
case 2:
_a.sent();
return [3 /*break*/, 0];
case 3: return [2 /*return*/];
}
});
}); })();
};
/**
* @brief stop the async function
*/
ListenerRss.prototype.stop = function () {
this.loopRunning = false;
};
/**
* @brief parse the datas inti a ListenerRSSInfos object
* @return return a ListenerRSSInfos object
*/
ListenerRss.prototype.getProperty = function () {
return {
address: this.address,
customfields: this.customfields,
lastEntriesLinks: this.lastEntriesLinks,
timeloop: this.timeloop,
};
};
return ListenerRss;
}(events_1.default));
exports.ListenerRss = ListenerRss;