imubot/src/middleware.js

A simple helpful bot.

// Generated by CoffeeScript 1.12.6
(function() {
  var Middleware, async;

  async = require('async');

  Middleware = (function() {
    Middleware.ticker = typeof setImmediate === "function" ? setImmediate : process.nextTick;

    function Middleware(bot) {
      this.bot = bot;
      this.stack = [];
    }

    Middleware.prototype.execute = function(context, next, done) {
      var allDone, executeSingleMiddleware;
      if (done == null) {
        done = function() {};
      }
      executeSingleMiddleware = (function(_this) {
        return function(doneFunc, middlewareFunc, cb) {
          var err, nextFunc;
          nextFunc = function(newDoneFunc) {
            return cb(null, newDoneFunc || doneFunc);
          };
          try {
            return middlewareFunc.call(void 0, context, nextFunc, doneFunc);
          } catch (error) {
            err = error;
            _this.bot.emit('error', err, context.response);
            return doneFunc();
          }
        };
      })(this);
      allDone = function(_, finalDoneFunc) {
        return next(context, finalDoneFunc);
      };
      return process.nextTick((function(_this) {
        return function() {
          return async.reduce(_this.stack, done, executeSingleMiddleware, allDone);
        };
      })(this));
    };

    Middleware.prototype.register = function(middleware) {
      if (middleware.length !== 3) {
        throw new Error("Incorrect number of arguments for middleware callback (expected 3, got " + middleware.length + ")");
      }
      this.stack.push(middleware);
      return void 0;
    };

    return Middleware;

  })();

  module.exports = Middleware;

}).call(this);