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 = during;
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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 _wrapAsync = require('./internal/wrapAsync');
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17 |
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18 | var _wrapAsync2 = _interopRequireDefault(_wrapAsync);
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19 |
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20 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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21 |
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22 | /**
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23 | * Like [`whilst`]{@link module:ControlFlow.whilst}, except the `test` is an asynchronous function that
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24 | * is passed a callback in the form of `function (err, truth)`. If error is
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25 | * passed to `test` or `fn`, the main callback is immediately called with the
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26 | * value of the error.
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27 | *
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28 | * @name during
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29 | * @static
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30 | * @memberOf module:ControlFlow
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31 | * @method
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32 | * @see [async.whilst]{@link module:ControlFlow.whilst}
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33 | * @category Control Flow
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34 | * @param {AsyncFunction} test - asynchronous truth test to perform before each
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35 | * execution of `fn`. Invoked with (callback).
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36 | * @param {AsyncFunction} fn - An async function which is called each time
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37 | * `test` passes. Invoked with (callback).
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38 | * @param {Function} [callback] - A callback which is called after the test
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39 | * function has failed and repeated execution of `fn` has stopped. `callback`
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40 | * will be passed an error, if one occurred, otherwise `null`.
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41 | * @example
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42 | *
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43 | * var count = 0;
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44 | *
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45 | * async.during(
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46 | * function (callback) {
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47 | * return callback(null, count < 5);
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48 | * },
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49 | * function (callback) {
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50 | * count++;
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51 | * setTimeout(callback, 1000);
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52 | * },
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53 | * function (err) {
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54 | * // 5 seconds have passed
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55 | * }
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56 | * );
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57 | */
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58 | function during(test, fn, callback) {
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59 | callback = (0, _onlyOnce2.default)(callback || _noop2.default);
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60 | var _fn = (0, _wrapAsync2.default)(fn);
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61 | var _test = (0, _wrapAsync2.default)(test);
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62 |
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63 | function next(err) {
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64 | if (err) return callback(err);
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65 | _test(check);
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66 | }
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67 |
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68 | function check(err, truth) {
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69 | if (err) return callback(err);
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70 | if (!truth) return callback(null);
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71 | _fn(next);
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72 | }
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73 |
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74 | _test(check);
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75 | }
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76 | module.exports = exports['default']; |
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