WEBVTT 00:05.240 --> 00:06.760 Hi everyone welcome back. 00:07.070 --> 00:12.200 So in this video we're going to be starting to implement the API of the actual API that will do the 00:12.200 --> 00:14.040 text comparison. 00:14.090 --> 00:17.140 And we're going to be dividing this into a couple of videos. 00:17.140 --> 00:22.520 So first of all we're going to implement the registration features so how do we make it to generate 00:22.520 --> 00:29.540 the user where we can you know check whether he exists in our database or not whether or how we can 00:29.540 --> 00:35.670 communicate for like his username and password and store it into our database and so on. 00:35.810 --> 00:40.650 So this should be fairly straightforward as we have done that previously. 00:41.030 --> 00:46.660 We're just going to be on a couple of extra things so previously we would just add a user into the database. 00:46.670 --> 00:52.490 But now we're going to be improving this feature and we're going to check first if the user exists. 00:52.490 --> 00:58.700 If it doesn't exist because if you remember from the chart protocol if the user does exist already I 00:58.700 --> 01:01.270 should return 3 of one invalid username. 01:01.340 --> 01:01.960 Right. 01:02.270 --> 01:02.860 OK. 01:02.990 --> 01:08.120 So you're going to add a couple of extra things but hopefully should be similar logic to what we did 01:08.120 --> 01:09.160 in the previous video. 01:09.170 --> 01:16.700 So we'll I'll try to go up in as fast as I can but also not sacrifice just explaining what I'm doing. 01:17.030 --> 01:25.700 So the first thing we always do is to import the if the necessary modules or libraries or functions 01:25.700 --> 01:32.190 from from class so I'm going to write from flask import and then I'm going to import a couple of things. 01:32.210 --> 01:35.200 First one on port the constructor flask. 01:35.240 --> 01:44.000 I'm also going to copy the G J signify function which basically changes a dictionary into a Jason replied 01:44.000 --> 01:51.020 to get the user right and we've used this to return the return adjacent to the user that sent us the 01:51.040 --> 01:52.360 requests right. 01:52.400 --> 01:58.670 And then we're also going to have requests or we have request over here that's what we need from flask. 01:58.670 --> 02:02.140 Now we also have some stuff that we need from flask restful. 02:02.170 --> 02:07.280 So from flask press photo we're going to import it and then we're going to couple it in court a couple 02:07.280 --> 02:12.380 of thing we're going to bore the API constructor and we're also going to import the resource right so 02:12.380 --> 02:16.300 resource make sure resource. 02:16.480 --> 02:16.900 OK. 02:16.970 --> 02:19.080 So make sure the spelling is correct. 02:19.190 --> 02:26.870 We also need to import the Mongo climbed from by Mungo's we're going to do it from Pine Mongo in port 02:28.470 --> 02:30.780 Mongo client. 02:30.820 --> 02:38.090 And if you remember it's and capital and C capital we're also going to import the crypt to be crypt 02:39.020 --> 02:44.150 because we want to store the password as a hashed password and not just a normal password. 02:44.450 --> 02:47.570 And then the last thing is we're going to be importing Spacey. 02:47.630 --> 02:55.400 OK so we're going to be using spacey but let's not important now but when we actually need it I'm going 02:55.400 --> 02:57.420 to come up here and add space. 02:57.440 --> 02:57.820 Right. 02:57.950 --> 03:01.670 So for now let's just leave it as it is and you don't eat pork. 03:02.170 --> 03:02.610 OK. 03:02.630 --> 03:08.660 So now we're going to do a couple of things that we always do so we're going to construct a flask application 03:08.660 --> 03:15.320 so act as equal to flask and then name you just give it the name of a square inch for name and square 03:15.320 --> 03:19.720 inch square marble and then we say API is equal to API. 03:20.090 --> 03:21.290 Right so we initialize that. 03:21.290 --> 03:23.740 This app is going to be an API. 03:24.260 --> 03:26.940 We also have to connect to Langone Baeza right. 03:26.950 --> 03:28.490 Client is equals. 03:28.500 --> 03:31.760 What's that client is equal to. 03:31.850 --> 03:33.230 Mongo client. 03:33.470 --> 03:36.870 And then inside there we're on right Mongo db. 03:37.400 --> 03:47.200 And then two dots like call us and we call and then two Dasch slashes and then NDB got 2 7 0 1 7. 03:47.240 --> 03:54.140 So that's basically connecting to that D-B that was made by this knocker file here so deep and just 03:54.200 --> 04:00.960 connecting to the default port that Mongo the Bjork's and which is 2 7 0 1 0. 04:01.160 --> 04:08.240 So now we're connected to Mongar client and then the next thing we want to do is to do D-B is equal 04:08.240 --> 04:09.550 to client. 04:09.710 --> 04:12.050 And then we want to do a new database. 04:12.050 --> 04:14.240 I want to call it simple liars. 04:14.350 --> 04:19.710 Me lariats the database OK so correct spelling. 04:19.870 --> 04:21.970 So client that similarity database. 04:22.210 --> 04:24.820 And then we're also going to be making a new table. 04:24.820 --> 04:26.970 Or if you remember and you collection. 04:27.100 --> 04:31.450 So a user is equal to D.B and then users. 04:31.600 --> 04:36.700 So this collection here is going to have a bunch of user name and hash passwords. 04:36.730 --> 04:37.720 OK. 04:38.200 --> 04:42.340 All right so now let's start with implementing the class. 04:42.580 --> 04:44.890 So we're going to implement the class register. 04:45.130 --> 04:45.810 OK. 04:45.960 --> 04:49.940 And then we're going to inherit from resource from the API. 04:50.070 --> 04:57.250 We Cirus some reason I keep writing it incorrectly and that are going to be since we discussed here 04:57.250 --> 04:59.980 that Shlash register is going to be post. 05:00.040 --> 05:07.790 So I'd like to implement this as opposed to someone to define post as post and then itself. 05:08.640 --> 05:10.720 OK so a couple of things we have to do. 05:10.720 --> 05:20.110 First of all we have to get the posted these are after say posted data is equal to request dot get underscore 05:20.380 --> 05:23.410 JCA right we get the education that was sent to us. 05:23.690 --> 05:24.150 OK. 05:24.310 --> 05:29.080 So this should be PPOs Ted data. 05:29.250 --> 05:29.910 OK. 05:30.220 --> 05:31.660 To get the request. 05:31.690 --> 05:32.800 Jason File. 05:33.190 --> 05:40.180 And then the second thing we're going to be doing is to get the username and the password that were 05:40.180 --> 05:40.630 posted. 05:40.640 --> 05:52.200 Right so I want to say a user name is equal to posted the username and password is equal to posted data. 05:52.500 --> 05:53.880 Basford right. 05:53.890 --> 05:57.270 So I just access it as a normal dictionary. 05:57.340 --> 05:58.660 Piven. 05:58.810 --> 06:01.230 Now the next thing is I'm going to do check. 06:01.270 --> 06:07.080 I want to check if this username exists already because if it does then I need to return to the users 06:07.240 --> 06:09.990 that hey this user already exists right. 06:10.000 --> 06:13.030 I need to send him 3 or 1 invalid username. 06:13.240 --> 06:14.010 OK. 06:14.230 --> 06:21.670 So I'm going to come here and then I'm not I right if user exist. 06:21.710 --> 06:23.860 So I haven't written this function yet. 06:23.870 --> 06:26.580 But if user exists user name. 06:26.690 --> 06:33.710 So if this user exists over here it's no need for this extra process the user exists then that means 06:33.710 --> 06:38.340 that I have to tell the user hey sorry three or 1 invalid user. 06:38.410 --> 06:45.080 So if the user exits with this username then I'm going to say return Jaisalmer is equal to and then 06:45.080 --> 06:57.080 I'm going to say status is 3 0 1 and message is invalid username invalid Youzhny. 06:57.710 --> 07:01.950 And then I'm going to return Jaison ify the return Jason. 07:02.000 --> 07:02.600 OK. 07:02.720 --> 07:06.130 So I want to return this dictionary Jason. 07:06.280 --> 07:06.690 OK. 07:06.770 --> 07:08.440 So that's if the user exists. 07:08.440 --> 07:11.880 So I tell him hey sorry invalid user choose another way. 07:12.380 --> 07:12.810 OK. 07:12.830 --> 07:18.590 That is not true on the other hand then I need to hash this password and then I need to store this username 07:18.620 --> 07:19.850 and hashed password. 07:20.060 --> 07:27.940 So that's a hashed password is equal to big crypt dot hash password. 07:28.190 --> 07:30.080 And then I'm going to say password. 07:30.180 --> 07:33.480 Well you remember we have to encode it in UGF 8. 07:33.610 --> 07:40.450 I'm going to encode UTF 8 OK and then I'm also going to generate a salt. 07:40.490 --> 07:47.020 So I want to say B crypt dot get generate salt from it. 07:47.070 --> 07:47.740 OK. 07:48.860 --> 07:55.690 And now finally I want to input this user with the username and password hash password into the database 07:55.700 --> 07:56.430 right. 07:56.450 --> 08:01.160 So I'm going to go users don't answer it. 08:01.770 --> 08:02.200 OK. 08:02.200 --> 08:14.910 So when I insert something into the user's database when I input username as username and password as 08:15.820 --> 08:21.260 hashed password you're going to store the hashed password and not the actual password. 08:21.370 --> 08:23.330 And then finally I'm going to start tokens. 08:23.350 --> 08:27.200 So the free tokens that any user gets is 60 seconds. 08:27.220 --> 08:31.510 You can only use six tokens for each user for free before he has to be. 08:31.600 --> 08:32.470 OK. 08:32.860 --> 08:38.590 So now that we've inserted this user then the only thing that we need to return to the user is a success 08:38.590 --> 08:41.580 message right 200 status code 200. 08:41.590 --> 08:42.520 OK. 08:42.820 --> 08:48.320 So let's go back and we're going to write returned J-Zone or return dictionary. 08:49.000 --> 08:52.630 And then we're going to say status is 200. 08:52.630 --> 08:54.190 So success. 08:54.320 --> 08:58.610 And then the message is you've successfully signed up for the API. 08:58.630 --> 09:05.790 Right so you've successfully signed up to the API. 09:06.400 --> 09:12.370 And then finally we return Jaison if I off the return Jason. 09:12.520 --> 09:13.070 OK. 09:13.220 --> 09:18.650 So this should be it for the return Jason and for the post function in general. 09:19.070 --> 09:19.630 OK. 09:19.750 --> 09:24.640 So but a couple of things that we haven't done yet is you're right the user exists. 09:24.680 --> 09:27.730 Right we haven't written this this function O'Rear. 09:27.920 --> 09:33.820 So we go back and then we're going to write define user exist. 09:33.970 --> 09:40.910 User name right we need to make a function that checks whether some user exists or not this user in 09:42.150 --> 09:45.410 so I'm going to say if users that's fine. 09:45.450 --> 09:48.210 So I'm going to try and find a user with this username. 09:48.210 --> 09:53.760 So when are you going to write it all in long lines so if you find usernames. 09:53.910 --> 09:58.840 I want a user with this username with with with this username. 09:59.210 --> 09:59.750 OK. 09:59.880 --> 10:07.320 So if I find it and then there's a useful function in Mongomery be called count so if count how many 10:07.320 --> 10:09.660 records match this find. 10:09.660 --> 10:09.930 Right. 10:09.930 --> 10:13.180 How many records have a user name is. 10:13.320 --> 10:21.350 So I am going to say if the user stuff find this user name is equal to zero then that means that there 10:21.360 --> 10:23.690 is no user with this user right. 10:23.790 --> 10:27.420 He doesn't exist because none of the records have this username. 10:27.570 --> 10:29.370 So I'm going to return false. 10:29.370 --> 10:29.970 Why. 10:29.970 --> 10:32.970 Because the user does not exist his account. 10:33.000 --> 10:38.390 None of the record none of the documents in this collection have a user name or fusion. 10:38.400 --> 10:42.860 So if it's equal to zero of the number of zero I'm going to return false. 10:43.010 --> 10:44.380 Else I'm going to return true. 10:44.430 --> 10:45.270 OK. 10:45.720 --> 10:46.880 So I'm going do. 10:47.130 --> 10:50.100 So that's basically it for the user exists. 10:50.310 --> 10:53.570 So let's go quickly over the logic of the registration. 10:53.610 --> 10:55.270 You get the posted data. 10:55.380 --> 10:56.670 We say the your name. 10:56.670 --> 11:00.630 Is this what the password is the posted data in password. 11:00.900 --> 11:07.300 And then we check if the user exists with this username that I telling users hey sorry three or one 11:07.380 --> 11:08.680 invalid username. 11:08.700 --> 11:09.980 Choose another username. 11:10.880 --> 11:12.490 And then else. 11:12.530 --> 11:15.630 So if this is not true then we don't return here. 11:15.700 --> 11:22.270 Then we first hash the password here and then I store the hashed password with the user name and they 11:22.370 --> 11:28.410 initialized the user with 60 seconds so that he can use the API at least six times to get a feel of 11:28.430 --> 11:30.140 how the API is working. 11:30.470 --> 11:36.320 And then I tell them 200 you successfully signed up to the API and I return Jason. 11:36.770 --> 11:38.950 And that should be OK. 11:38.990 --> 11:40.160 So we're going to stop here. 11:40.190 --> 11:44.990 And in the next video we're going to see how we can implement the detection right where we're going 11:44.990 --> 11:51.130 to be using this model over here the space the natural language processing library. 11:51.410 --> 11:53.550 So until the next video app decoding.