Add youtube preview and store youtube api data in db (#39)

* merged widget_tweak and added url preview and storage of data to db

* changes done
partially fix #8

README.md

@@ -48,6 +48,20 @@ python3 manage.py migrate
 python manage.py createsuperuser
 ```
 
+* Then generate a API Key:
+
+1. Visit the url https://console.cloud.google.com/apis/
+2. Sign in with your google account.
+3. Search for **YouTube Data API v3** and enable it.
+4. After enabling go to credentials present in the left navbar. 
+5. Select a project (if none project is present then create one and select). After selecting create a API Key for it.
+6. Save the value of API Key in the environment variable. Below command can be used for linux user. 
+```
+export YOUTUBE_API_KEY =  "Your API Key"
+```
+7. For Windows **set** can be used to save the value in env variable.
+
+
 * Finally, you’re ready to start the development server:
 ```
 python manage.py runserver

learn/admin.py

@@ -31,4 +31,4 @@ class BookmarkAdmin(admin.ModelAdmin):
 admin.site.register(Vote)
 admin.site.register(LogEntry)
 admin.site.register(Category,CategoryAdmin)
-
+admin.site.register(YoutubeResource)

learn/migrations/0033_youtuberesource_squashed_0035_auto_20181227_1729.py

@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.15 on 2018-12-30 19:56
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    replaces = [('learn', '0033_youtuberesource'), ('learn', '0034_auto_20181227_1729'), ('learn', '0035_auto_20181227_1729')]
+
+    dependencies = [
+        ('learn', '0032_auto_20181217_2102'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='YoutubeResource',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('published_at', models.CharField(max_length=100)),
+                ('title', models.CharField(max_length=50)),
+                ('description', models.TextField(max_length=10000)),
+                ('thumbnail_url', models.CharField(max_length=100)),
+                ('duration', models.CharField(max_length=10)),
+                ('view_count', models.IntegerField()),
+                ('like_count', models.IntegerField()),
+                ('dislike_count', models.IntegerField()),
+                ('comment_count', models.IntegerField()),
+            ],
+        ),
+    ]

learn/models.py

@@ -194,3 +194,16 @@ def update_score_on_vote(sender, instance, **kwargs):
 Youtube Video => Channel, Views, Upvotes, Downvotes,
 MOOC => Instructor,
 """
+class YoutubeResource(models.Model):
+    published_at = models.CharField(max_length=100)
+    title = models.CharField(max_length=50)
+    description = models.TextField(max_length=10000)
+    thumbnail_url = models.CharField(max_length=100)
+    duration = models.CharField(max_length=10)
+    view_count = models.IntegerField()
+    like_count = models.IntegerField()
+    dislike_count = models.IntegerField()
+    comment_count = models.IntegerField()
+
+    def __str__(self):
+        return self.title

learn/templates/learn/youtube_resource.html

@@ -0,0 +1,23 @@
+{% extends 'base.html' %}
+{% block content %}
+
+        <form method="post" action="{% url 'youtubeResourcePreview' %}">
+            {% csrf_token %}
+            <div class="form-group">
+              <label for="email">Url:</label>
+              <input type="text" class="form-control" name="url">
+              <input type="submit" value="Preview" class="btn btn-primary">
+            </div>
+        </form>
+
+        {% if flag %}
+        <h4>{{title}}</h4>
+        <img src={{thumbnail_url}} height="200px" width="200px"> 
+        <form method='post' action="{% url 'youtubeResource'%}">
+          {% csrf_token %}
+          <input type="submit" value="Yes" class="btn btn-success"name="next">
+          <input type="submit" class="btn btn-danger" value="No" name="no">
+        </form>
+        {% endif %}
+
+{% endblock %}

learn/urls.py

@@ -35,7 +35,8 @@
 	url(r'^category/(?P<category_slug>[-\w]+)/$',SelectedTopicList.as_view(),name="SelectedTopicList"),
 
 	url(r'^ajaxcall/topicautocomplete/',autocompleteSuggestionTopic,name="AjaxTopicAutocomplete"),
-
+	url(r'^youtubeResource/$',youtubeResource,name="youtubeResource"),
+	url(r'^youtubeResourcePreview/$',youtubeResourcePreview,name="youtubeResourcePreview"),
 ]
 
 urlpatterns+=[

learn/views.py

@@ -19,6 +19,11 @@
 from .models import *
 from .forms import *
 
+import urllib.request as urlreq
+import json
+import os
+from startlearning.settings import YOUTUBE_API_KEY
+
 # Create your views here.
 class ImageUploadForm(forms.Form):
 	"""Image upload form."""
@@ -353,3 +358,76 @@ def autocompleteSuggestionTopic(request):
 			'list': filter_topic,
 		}
 		return JsonResponse(data)
+
+
+url_entires = {}
+
+'''
+Below method is used to insert the data into model when url is apporved by the user. 
+'''
+def youtubeResource(request):
+	if request.method == "POST":
+		if request.POST.get("next") == "Yes":	
+			items = url_entires['session_variable']
+
+			contentDetails = items["contentDetails"]
+			snippet = items['snippet']
+			statistics = items['statistics']
+			m,s = contentDetails["duration"].replace("PT","").replace("S","").split("M")
+			dur = int(s) + int(m)*60 	
+			result = {
+				"published_at"	:	snippet["publishedAt"].replace("T"," ").replace("Z",""),
+				"title"			:	snippet['title'],
+				"description"	:	snippet['description'],
+				"thumbnail_url"	:	snippet['thumbnails']['high']['url'],
+				"duration"		:	dur,
+				"view_count"	:	int(statistics['viewCount']),
+				"like_count"	:	int(statistics['likeCount']),
+				"dislike_count"	:	int(statistics['dislikeCount']),
+				"comment_count"	:	int(statistics['commentCount'])
+			}
+			del url_entires['session_variable']
+			resource = YoutubeResource(**result)
+			resource.save()
+
+		elif request.POST.get("no") == "No":
+			pass
+	return HttpResponseRedirect(reverse('youtubeResourcePreview'))
+
+'''
+Below method stores the data returned by the Youtube v3 API in a global variable "url_entries" 
+according to the session of users as key and data as its value. This data is furthur used when
+user approved the url.
+'''
+def youtubeResourcePreview(request):
+	flag = False
+	if request.method == "POST":
+		url = request.POST.get("url")
+		flag = True
+		if "watch" in url:
+			#Identifies that it is a video
+			_,slug = url.split("watch?v=")
+			try:
+				contents = urlreq.urlopen("https://www.googleapis.com/youtube/v3/videos?part=snippet%2CcontentDetails%2Cstatistics&id="+slug+"&key="+YOUTUBE_API_KEY).read()
+				contents = json.loads(contents.decode('utf-8')) 
+				items = contents["items"][0]
+				snippet = items['snippet']
+
+				context = {
+					"title"			:	snippet['title'],
+					"thumbnail_url"	:	snippet['thumbnails']['standard']['url'],
+					"flag"			: 	flag
+				}
+				url_entires['session_variable'] = items
+				return render(request,'learn/youtube_resource.html',context)
+			except Exception as e:
+				print(e)
+				return HttpResponse("Check console")
+
+		elif "playlist" in url:
+			#Identifies that it is a playlist
+			pass
+		elif "channel" in url:
+			#Identifies that it is a channel
+			pass
+	return render(request,'learn/youtube_resource.html',{"flag":flag})

startlearning/settings.py

@@ -27,6 +27,7 @@
 
 # SECURITY WARNING: keep the secret key used in production secret!
 SECRET_KEY = 'umaz=2g7x-_)1kf(9e0po(p-)su$_q(=9ayknt6m9v#ar&qzwm'
+YOUTUBE_API_KEY = os.getenv("YOUTUBE_API_KEY")
 
 ALLOWED_HOSTS = ['127.0.0.1','localhost',]