1 00:00:02,290 --> 00:00:04,540 Now, refactoring the routes 2 00:00:04,540 --> 00:00:06,800 is only a start though. 3 00:00:06,800 --> 00:00:08,980 There's more we can refactor. 4 00:00:08,980 --> 00:00:12,890 And there is more we can refactor in those route files, 5 00:00:12,890 --> 00:00:14,180 but before we do that, 6 00:00:14,180 --> 00:00:17,440 I'll take a look at the app.js file. 7 00:00:17,440 --> 00:00:19,820 This file is definitely not bad. 8 00:00:19,820 --> 00:00:23,920 It's pretty lean, but there are a couple of things 9 00:00:23,920 --> 00:00:25,740 we could extract. 10 00:00:25,740 --> 00:00:29,940 For example, you could extract configuration settings 11 00:00:29,940 --> 00:00:32,890 like this object for the session 12 00:00:32,890 --> 00:00:35,560 into a separate config.file. 13 00:00:35,560 --> 00:00:37,410 It's not a must do. 14 00:00:37,410 --> 00:00:40,990 None of the things mentioned here are must dos. 15 00:00:40,990 --> 00:00:43,280 But it is something you could do, 16 00:00:43,280 --> 00:00:47,470 if you find yourself having a lot of configuration objects 17 00:00:47,470 --> 00:00:50,860 in that file, and you wanna split that up. 18 00:00:50,860 --> 00:00:53,540 And therefore, to show this to you, I will do it here. 19 00:00:53,540 --> 00:00:56,250 But again, keep in mind, it's optional. 20 00:00:56,250 --> 00:00:58,800 Splitting the routes was also optional, 21 00:00:58,800 --> 00:01:00,790 but strongly recommended. 22 00:01:00,790 --> 00:01:03,860 Extracting configuration objects is optional 23 00:01:03,860 --> 00:01:06,370 and not necessarily recommended. 24 00:01:06,370 --> 00:01:08,701 It's totally up to you. 25 00:01:08,701 --> 00:01:11,890 So we'll add a new folder and I'll name it config. 26 00:01:11,890 --> 00:01:14,100 Though, the name is up to you. 27 00:01:14,100 --> 00:01:16,900 This is no reserved name or anything like that. 28 00:01:16,900 --> 00:01:19,610 You can name that folder whatever you want. 29 00:01:19,610 --> 00:01:22,769 And here in this config folder, 30 00:01:22,769 --> 00:01:27,769 I will add a session.js file like this. 31 00:01:27,820 --> 00:01:30,100 And in there I'll now register 32 00:01:30,100 --> 00:01:35,010 all these session config objects that I use in app.js. 33 00:01:35,010 --> 00:01:37,660 Like this object for configuring the MongoDBStore 34 00:01:38,900 --> 00:01:42,343 and then this object for configuring the session itself. 35 00:01:43,560 --> 00:01:46,520 And actually, I'll take this entire sessionStore 36 00:01:46,520 --> 00:01:51,140 constant here from app.js and move that into session.js 37 00:01:51,140 --> 00:01:52,053 like this. 38 00:01:53,490 --> 00:01:57,260 And therefore, I'll also grab the MongoDBStore here 39 00:01:58,700 --> 00:02:03,110 and cut that from app.js and bring that into session.js 40 00:02:03,110 --> 00:02:06,343 because we're now using that MongoDBStore there. 41 00:02:07,190 --> 00:02:10,446 Now, I need that MongoDBStore function here. 42 00:02:10,446 --> 00:02:13,882 And for this in app.js, I'll extract 43 00:02:13,882 --> 00:02:18,784 this require statement here, where I require MongoDBStore. 44 00:02:18,784 --> 00:02:22,563 And I will cut that, and bring that here 45 00:02:22,563 --> 00:02:24,563 into session.js as well. 46 00:02:25,720 --> 00:02:29,943 And I will now wrap this sessionStore creation 47 00:02:29,943 --> 00:02:31,276 into a function, 48 00:02:32,284 --> 00:02:36,540 createSessionStore would be a fitting name 49 00:02:36,540 --> 00:02:40,180 and I'll move that into this function. 50 00:02:40,180 --> 00:02:44,230 I will also move this line here into this function 51 00:02:44,230 --> 00:02:45,730 because this is not an import. 52 00:02:45,730 --> 00:02:48,560 I'm just creating the MongoDBStore object. 53 00:02:48,560 --> 00:02:51,970 And since this needs that session middleware, 54 00:02:51,970 --> 00:02:53,170 which we'll be using, 55 00:02:53,170 --> 00:02:56,750 I will simply accept this here as a parameter value 56 00:02:56,750 --> 00:02:58,263 in my custom function. 57 00:02:59,183 --> 00:03:02,290 And I will then export this function 58 00:03:02,290 --> 00:03:04,803 with module.exports as you learned it. 59 00:03:05,940 --> 00:03:08,620 So I will export this function here. 60 00:03:08,620 --> 00:03:10,520 I'll name it createSessionStore 61 00:03:10,520 --> 00:03:12,886 and point at this createSessionStore function 62 00:03:12,886 --> 00:03:15,863 I just created like this. 63 00:03:17,600 --> 00:03:19,196 And now back in app.js, 64 00:03:19,196 --> 00:03:21,960 we can import from this config.file, 65 00:03:21,960 --> 00:03:24,195 call this function and pass the session to it, 66 00:03:24,195 --> 00:03:26,730 to have this logic outsourced. 67 00:03:26,730 --> 00:03:30,110 In this function, I now just also want to return 68 00:03:30,110 --> 00:03:32,940 my sessionStore here, which I'm creating. 69 00:03:32,940 --> 00:03:35,856 So that the logic for creating it is outsourced 70 00:03:35,856 --> 00:03:37,810 and these configuration items 71 00:03:37,810 --> 00:03:41,510 are, but I can still get my session store in the place 72 00:03:41,510 --> 00:03:44,450 where I need it, which is the app.js file. 73 00:03:44,450 --> 00:03:47,790 So here I'll get my sessionConfig now, 74 00:03:47,790 --> 00:03:52,790 let's say in app.js by requiring ./config/session. 75 00:03:54,380 --> 00:03:56,980 So now I'm requiring this object, 76 00:03:56,980 --> 00:04:00,660 which I'm exporting here in the session.js file. 77 00:04:00,660 --> 00:04:03,690 And in there, I'll have the createSessionStore function, 78 00:04:03,690 --> 00:04:05,240 which I can call. 79 00:04:05,240 --> 00:04:09,040 So therefore, I can now get my mongoDBSessionStore 80 00:04:10,620 --> 00:04:14,559 by executing sessionConfig.createSessionStore. 81 00:04:14,559 --> 00:04:18,000 And to this function, I need to pass session, 82 00:04:18,000 --> 00:04:20,320 this middleware, which I'm importing here 83 00:04:20,320 --> 00:04:22,793 because that is used by that function. 84 00:04:25,620 --> 00:04:28,700 And now I'll just also grab this 85 00:04:30,870 --> 00:04:35,090 session creation here or just that object. 86 00:04:35,090 --> 00:04:37,940 It is up to you what you wanna do. 87 00:04:37,940 --> 00:04:39,570 I'll grab just the object here 88 00:04:39,570 --> 00:04:41,970 to show you that you can do both. 89 00:04:41,970 --> 00:04:45,725 And I'll add this here in session.js as well. 90 00:04:45,725 --> 00:04:48,061 So here I'll add another function, 91 00:04:48,061 --> 00:04:52,183 createSession or a createSessionConfig. 92 00:04:53,370 --> 00:04:57,440 And there, I will simply return this object, 93 00:04:57,440 --> 00:04:59,410 which I just cut. 94 00:04:59,410 --> 00:05:02,950 There, I need my sessionStore, so I'll except this here 95 00:05:02,950 --> 00:05:04,553 as a parameter as well. 96 00:05:05,640 --> 00:05:07,756 And then I'll export this unction 97 00:05:07,756 --> 00:05:10,637 just as I'm exporting createSessionStore. 98 00:05:10,637 --> 00:05:14,830 So this createSessionConfig function 99 00:05:14,830 --> 00:05:17,043 will be exported as well. 100 00:05:18,140 --> 00:05:21,730 And now in app.js, we can also call that. 101 00:05:21,730 --> 00:05:24,010 So now here, where I need the config, 102 00:05:24,010 --> 00:05:26,490 I can use my sessionConfig 103 00:05:26,490 --> 00:05:31,460 and call createSessionConfig and pass my mongoDBSessionStore 104 00:05:31,460 --> 00:05:35,275 as an argument, as a parameter value to this function. 105 00:05:35,275 --> 00:05:38,790 So that's this mongoDBSessionsStore I created before 106 00:05:38,790 --> 00:05:40,435 with that other function that lives 107 00:05:40,435 --> 00:05:42,513 in the sessionConfig file. 108 00:05:44,090 --> 00:05:47,100 And again, I will emphasize, this is optional 109 00:05:47,100 --> 00:05:50,640 and this is all just one way of implementing this. 110 00:05:50,640 --> 00:05:54,079 We could do the entire session setup into session.js file 111 00:05:54,079 --> 00:05:57,932 and directly use the store which we are creating here 112 00:05:57,932 --> 00:06:01,100 in the config and then just return 113 00:06:01,100 --> 00:06:03,221 the initialized session middleware, 114 00:06:03,221 --> 00:06:05,850 so you can do whatever you want. 115 00:06:05,850 --> 00:06:08,250 This is just one possible approach 116 00:06:08,250 --> 00:06:10,433 to extract some parts that are involved 117 00:06:10,433 --> 00:06:14,670 with this configuration from the app.js file 118 00:06:14,670 --> 00:06:16,840 into a separate file. 119 00:06:16,840 --> 00:06:18,816 And we could do this for the configuration 120 00:06:18,816 --> 00:06:22,723 for other middleware as well, but I'll keep it like this. 121 00:06:22,723 --> 00:06:25,600 I'll just focus on the session at the moment 122 00:06:25,600 --> 00:06:29,183 and just saved this and see whether that still works. 123 00:06:30,100 --> 00:06:33,360 If I'm quickly logging in here, 124 00:06:33,360 --> 00:06:36,700 yeah, I can still move around here. 125 00:06:36,700 --> 00:06:39,680 So that all seems to work. 126 00:06:39,680 --> 00:06:42,410 Let's see if flashing error message 127 00:06:42,410 --> 00:06:45,010 has onto the session also still works 128 00:06:45,010 --> 00:06:49,113 if I try to create a user that already exists, yes it does. 129 00:06:50,635 --> 00:06:54,300 So that's how we could extract configuration 130 00:06:54,300 --> 00:06:56,053 if we want it to do that.