1 | ;
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.default = forever;
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7 |
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8 | var _noop = require('lodash/noop');
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9 |
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10 | var _noop2 = _interopRequireDefault(_noop);
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11 |
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12 | var _onlyOnce = require('./internal/onlyOnce');
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13 |
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14 | var _onlyOnce2 = _interopRequireDefault(_onlyOnce);
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15 |
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16 | var _ensureAsync = require('./ensureAsync');
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17 |
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18 | var _ensureAsync2 = _interopRequireDefault(_ensureAsync);
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19 |
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20 | var _wrapAsync = require('./internal/wrapAsync');
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21 |
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22 | var _wrapAsync2 = _interopRequireDefault(_wrapAsync);
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23 |
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24 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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25 |
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26 | /**
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27 | * Calls the asynchronous function `fn` with a callback parameter that allows it
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28 | * to call itself again, in series, indefinitely.
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29 |
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30 | * If an error is passed to the callback then `errback` is called with the
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31 | * error, and execution stops, otherwise it will never be called.
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32 | *
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33 | * @name forever
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34 | * @static
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35 | * @memberOf module:ControlFlow
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36 | * @method
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37 | * @category Control Flow
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38 | * @param {AsyncFunction} fn - an async function to call repeatedly.
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39 | * Invoked with (next).
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40 | * @param {Function} [errback] - when `fn` passes an error to it's callback,
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41 | * this function will be called, and execution stops. Invoked with (err).
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42 | * @example
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43 | *
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44 | * async.forever(
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45 | * function(next) {
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46 | * // next is suitable for passing to things that need a callback(err [, whatever]);
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47 | * // it will result in this function being called again.
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48 | * },
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49 | * function(err) {
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50 | * // if next is called with a value in its first parameter, it will appear
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51 | * // in here as 'err', and execution will stop.
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52 | * }
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53 | * );
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54 | */
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55 | function forever(fn, errback) {
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56 | var done = (0, _onlyOnce2.default)(errback || _noop2.default);
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57 | var task = (0, _wrapAsync2.default)((0, _ensureAsync2.default)(fn));
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58 |
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59 | function next(err) {
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60 | if (err) return done(err);
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61 | task(next);
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62 | }
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63 | next();
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64 | }
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65 | module.exports = exports['default']; |
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