Merge pull request #528 from publicus/video_privacy_enhancer_plugin_development

Update plugin to enhance privacy with video embeds

video_privacy_enhancer/video_service_thumbnail_url_generating_functions.py

@@ -0,0 +1,32 @@
+"""A function for each service to download the video thumbnail
+
+Each function should accept one argument (the video id from that service) and should return the download URL for the video's thumbnail.
+
+"""
+
+"""
+LIBRARIES
+"""
+
+import urllib # For downloading the video thumbnails. Not as clean as, e.g., the requests module, but installed by default in many Python distributions.
+
+import json
+
+"""
+END OF LIBRARIES
+"""
+
+def generate_thumbnail_download_link_youtube(video_id_from_shortcode):
+	"""Thumbnail URL generator for YouTube videos."""
+	
+	thumbnail_download_link="https://img.youtube.com/vi/" + video_id_from_shortcode + "/0.jpg"
+	return thumbnail_download_link
+
+def generate_thumbnail_download_link_vimeo(video_id_from_shortcode):
+	"""Thumbnail URL generator for Vimeo videos."""
+	
+	# Following the Vimeo API at https://developer.vimeo.com/api#video-request, we need to request the video's metadata and get the thumbnail from that. To do this, we'll use the requests module both to get and parse the JSON for this task.
+	video_metadata = urllib.urlopen("https://vimeo.com/api/v2/video/" + video_id_from_shortcode + ".json") # Download the video's metadata in JSON format.
+	video_metadata_parsed = json.load(video_metadata) # Parse the JSON
+	video_thumbnail_large_location = video_metadata_parsed[0]['thumbnail_large'] # Go into the JSON and get the URL of the thumbnail.
+	return video_thumbnail_large_location