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author | Minteck <contact@minteck.org> | 2022-11-28 17:14:38 +0100 |
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committer | Minteck <contact@minteck.org> | 2022-11-28 17:14:38 +0100 |
commit | 18efd30a263ec0d79a26a82cbd8c90c9f81056b7 (patch) | |
tree | aea01bf3506dda706719fc68eb37b77ed9ef3fe8 /node_modules/async/seq.js | |
download | autoreport-mane.tar.gz autoreport-mane.tar.bz2 autoreport-mane.zip |
Diffstat (limited to 'node_modules/async/seq.js')
-rw-r--r-- | node_modules/async/seq.js | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/node_modules/async/seq.js b/node_modules/async/seq.js new file mode 100644 index 0000000..28c825f --- /dev/null +++ b/node_modules/async/seq.js @@ -0,0 +1,79 @@ +'use strict'; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.default = seq; + +var _reduce = require('./reduce.js'); + +var _reduce2 = _interopRequireDefault(_reduce); + +var _wrapAsync = require('./internal/wrapAsync.js'); + +var _wrapAsync2 = _interopRequireDefault(_wrapAsync); + +var _promiseCallback = require('./internal/promiseCallback.js'); + +function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + +/** + * Version of the compose function that is more natural to read. Each function + * consumes the return value of the previous function. It is the equivalent of + * [compose]{@link module:ControlFlow.compose} with the arguments reversed. + * + * Each function is executed with the `this` binding of the composed function. + * + * @name seq + * @static + * @memberOf module:ControlFlow + * @method + * @see [async.compose]{@link module:ControlFlow.compose} + * @category Control Flow + * @param {...AsyncFunction} functions - the asynchronous functions to compose + * @returns {Function} a function that composes the `functions` in order + * @example + * + * // Requires lodash (or underscore), express3 and dresende's orm2. + * // Part of an app, that fetches cats of the logged user. + * // This example uses `seq` function to avoid overnesting and error + * // handling clutter. + * app.get('/cats', function(request, response) { + * var User = request.models.User; + * async.seq( + * User.get.bind(User), // 'User.get' has signature (id, callback(err, data)) + * function(user, fn) { + * user.getCats(fn); // 'getCats' has signature (callback(err, data)) + * } + * )(req.session.user_id, function (err, cats) { + * if (err) { + * console.error(err); + * response.json({ status: 'error', message: err.message }); + * } else { + * response.json({ status: 'ok', message: 'Cats found', data: cats }); + * } + * }); + * }); + */ +function seq(...functions) { + var _functions = functions.map(_wrapAsync2.default); + return function (...args) { + var that = this; + + var cb = args[args.length - 1]; + if (typeof cb == 'function') { + args.pop(); + } else { + cb = (0, _promiseCallback.promiseCallback)(); + } + + (0, _reduce2.default)(_functions, args, (newargs, fn, iterCb) => { + fn.apply(that, newargs.concat((err, ...nextargs) => { + iterCb(err, nextargs); + })); + }, (err, results) => cb(err, ...results)); + + return cb[_promiseCallback.PROMISE_SYMBOL]; + }; +} +module.exports = exports['default'];
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