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Directory : /var/app/comcon25/comcon-2025-cms/node_modules/async/

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Current File : /var/app/comcon25/comcon-2025-cms/node_modules/async/autoInject.js

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.default = autoInject;

var _auto = require('./auto.js');

var _auto2 = _interopRequireDefault(_auto);

var _wrapAsync = require('./internal/wrapAsync.js');

var _wrapAsync2 = _interopRequireDefault(_wrapAsync);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var FN_ARGS = /^(?:async\s+)?(?:function)?\s*\w*\s*\(\s*([^)]+)\s*\)(?:\s*{)/;
var ARROW_FN_ARGS = /^(?:async\s+)?\(?\s*([^)=]+)\s*\)?(?:\s*=>)/;
var FN_ARG_SPLIT = /,/;
var FN_ARG = /(=.+)?(\s*)$/;

function stripComments(string) {
    let stripped = '';
    let index = 0;
    let endBlockComment = string.indexOf('*/');
    while (index < string.length) {
        if (string[index] === '/' && string[index + 1] === '/') {
            // inline comment
            let endIndex = string.indexOf('\n', index);
            index = endIndex === -1 ? string.length : endIndex;
        } else if (endBlockComment !== -1 && string[index] === '/' && string[index + 1] === '*') {
            // block comment
            let endIndex = string.indexOf('*/', index);
            if (endIndex !== -1) {
                index = endIndex + 2;
                endBlockComment = string.indexOf('*/', index);
            } else {
                stripped += string[index];
                index++;
            }
        } else {
            stripped += string[index];
            index++;
        }
    }
    return stripped;
}

function parseParams(func) {
    const src = stripComments(func.toString());
    let match = src.match(FN_ARGS);
    if (!match) {
        match = src.match(ARROW_FN_ARGS);
    }
    if (!match) throw new Error('could not parse args in autoInject\nSource:\n' + src);
    let [, args] = match;
    return args.replace(/\s/g, '').split(FN_ARG_SPLIT).map(arg => arg.replace(FN_ARG, '').trim());
}

/**
 * A dependency-injected version of the [async.auto]{@link module:ControlFlow.auto} function. Dependent
 * tasks are specified as parameters to the function, after the usual callback
 * parameter, with the parameter names matching the names of the tasks it
 * depends on. This can provide even more readable task graphs which can be
 * easier to maintain.
 *
 * If a final callback is specified, the task results are similarly injected,
 * specified as named parameters after the initial error parameter.
 *
 * The autoInject function is purely syntactic sugar and its semantics are
 * otherwise equivalent to [async.auto]{@link module:ControlFlow.auto}.
 *
 * @name autoInject
 * @static
 * @memberOf module:ControlFlow
 * @method
 * @see [async.auto]{@link module:ControlFlow.auto}
 * @category Control Flow
 * @param {Object} tasks - An object, each of whose properties is an {@link AsyncFunction} of
 * the form 'func([dependencies...], callback). The object's key of a property
 * serves as the name of the task defined by that property, i.e. can be used
 * when specifying requirements for other tasks.
 * * The `callback` parameter is a `callback(err, result)` which must be called
 *   when finished, passing an `error` (which can be `null`) and the result of
 *   the function's execution. The remaining parameters name other tasks on
 *   which the task is dependent, and the results from those tasks are the
 *   arguments of those parameters.
 * @param {Function} [callback] - An optional callback which is called when all
 * the tasks have been completed. It receives the `err` argument if any `tasks`
 * pass an error to their callback, and a `results` object with any completed
 * task results, similar to `auto`.
 * @returns {Promise} a promise, if no callback is passed
 * @example
 *
 * //  The example from `auto` can be rewritten as follows:
 * async.autoInject({
 *     get_data: function(callback) {
 *         // async code to get some data
 *         callback(null, 'data', 'converted to array');
 *     },
 *     make_folder: function(callback) {
 *         // async code to create a directory to store a file in
 *         // this is run at the same time as getting the data
 *         callback(null, 'folder');
 *     },
 *     write_file: function(get_data, make_folder, callback) {
 *         // once there is some data and the directory exists,
 *         // write the data to a file in the directory
 *         callback(null, 'filename');
 *     },
 *     email_link: function(write_file, callback) {
 *         // once the file is written let's email a link to it...
 *         // write_file contains the filename returned by write_file.
 *         callback(null, {'file':write_file, 'email':'user@example.com'});
 *     }
 * }, function(err, results) {
 *     console.log('err = ', err);
 *     console.log('email_link = ', results.email_link);
 * });
 *
 * // If you are using a JS minifier that mangles parameter names, `autoInject`
 * // will not work with plain functions, since the parameter names will be
 * // collapsed to a single letter identifier.  To work around this, you can
 * // explicitly specify the names of the parameters your task function needs
 * // in an array, similar to Angular.js dependency injection.
 *
 * // This still has an advantage over plain `auto`, since the results a task
 * // depends on are still spread into arguments.
 * async.autoInject({
 *     //...
 *     write_file: ['get_data', 'make_folder', function(get_data, make_folder, callback) {
 *         callback(null, 'filename');
 *     }],
 *     email_link: ['write_file', function(write_file, callback) {
 *         callback(null, {'file':write_file, 'email':'user@example.com'});
 *     }]
 *     //...
 * }, function(err, results) {
 *     console.log('err = ', err);
 *     console.log('email_link = ', results.email_link);
 * });
 */
function autoInject(tasks, callback) {
    var newTasks = {};

    Object.keys(tasks).forEach(key => {
        var taskFn = tasks[key];
        var params;
        var fnIsAsync = (0, _wrapAsync.isAsync)(taskFn);
        var hasNoDeps = !fnIsAsync && taskFn.length === 1 || fnIsAsync && taskFn.length === 0;

        if (Array.isArray(taskFn)) {
            params = [...taskFn];
            taskFn = params.pop();

            newTasks[key] = params.concat(params.length > 0 ? newTask : taskFn);
        } else if (hasNoDeps) {
            // no dependencies, use the function as-is
            newTasks[key] = taskFn;
        } else {
            params = parseParams(taskFn);
            if (taskFn.length === 0 && !fnIsAsync && params.length === 0) {
                throw new Error("autoInject task functions require explicit parameters.");
            }

            // remove callback param
            if (!fnIsAsync) params.pop();

            newTasks[key] = params.concat(newTask);
        }

        function newTask(results, taskCb) {
            var newArgs = params.map(name => results[name]);
            newArgs.push(taskCb);
            (0, _wrapAsync2.default)(taskFn)(...newArgs);
        }
    });

    return (0, _auto2.default)(newTasks, callback);
}
module.exports = exports['default'];

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