Create youtube_tools.py

core/youtube_tools.py

@@ -0,0 +1,142 @@
+import pafy
+
+from core import internals
+from core import arguments
+from core.logger import log
+
+import os
+import pprint
+
+args = arguments.parsed
+
+
+def go_pafy(raw_song, meta_tags=None):
+    """ Parse track from YouTube. """
+    if internals.is_youtube(raw_song):
+        track_info = pafy.new(raw_song)
+    else:
+        track_url = generate_youtube_url(raw_song, meta_tags)
+
+        if track_url:
+            track_info = pafy.new(track_url)
+        else:
+            track_info = None
+
+    return track_info
+
+
+def get_youtube_title(content, number=None):
+    """ Get the YouTube video's title. """
+    title = content.title
+    if number:
+        return '{0}. {1}'.format(number, title)
+    else:
+        return title
+
+
+def download_song(file_name, content):
+    """ Download the audio file from YouTube. """
+    if args.input_ext in (".webm", ".m4a"):
+        link = content.getbestaudio(preftype=args.input_ext[1:])
+    else:
+        return False
+
+    if link:
+        log.debug('Downloading from URL: ' + link.url)
+        filepath = '{0}{1}'.format(os.path.join(args.folder, file_name),
+                                   args.input_ext)
+        log.debug('Saving to: ' + filepath)
+        link.download(filepath=filepath)
+        return True
+    else:
+        return False
+
+
+def generate_youtube_url(raw_song, meta_tags, tries_remaining=5):
+    """ Search for the song on YouTube and generate a URL to its video. """
+    # prevents an infinite loop but allows for a few retries
+    if tries_remaining == 0:
+        log.debug('No tries left. I quit.')
+        return
+
+    query = { 'part'       : 'snippet',
+              'maxResults' :  50,
+              'type'       : 'video' }
+
+    if args.music_videos_only:
+        query['videoCategoryId'] = '10'
+
+    if not meta_tags:
+        song = raw_song
+        query['q'] = song
+    else:
+        song = internals.generate_songname(meta_tags)
+        query['q'] = song
+    log.debug('Query: {0}'.format(query))
+
+    data = pafy.call_gdata('search', query)
+    query2 = {'part': 'contentDetails,snippet,statistics',
+              'maxResults': 50,
+              'id': ','.join(i['id']['videoId'] for i in data['items'])}
+    log.debug('Query2: {0}'.format(query2))
+
+    vdata = pafy.call_gdata('videos', query2)
+
+    videos = []
+    for x in vdata['items']:
+        duration_s = pafy.playlist.parseISO8591(x['contentDetails']['duration'])
+        youtubedetails = {'link': x['id'], 'title': x['snippet']['title'],
+                          'videotime':internals.videotime_from_seconds(duration_s),
+                          'seconds': duration_s}
+        videos.append(youtubedetails)
+        if not meta_tags:
+            break
+
+    if not videos:
+        return None
+
+    log.debug(pprint.pformat(videos))
+
+    if args.manual:
+        log.info(song)
+        log.info('0. Skip downloading this song.\n')
+        # fetch all video links on first page on YouTube
+        for i, v in enumerate(videos):
+            log.info(u'{0}. {1} {2} {3}'.format(i+1, v['title'], v['videotime'],
+                  "http://youtube.com/watch?v="+v['link']))
+        # let user select the song to download
+        result = internals.input_link(videos)
+        if not result:
+            return None
+    else:
+        if not meta_tags:
+            # if the metadata could not be acquired, take the first result
+            # from Youtube because the proper song length is unknown
+            result = videos[0]
+            log.debug('Since no metadata found on Spotify, going with the first result')
+        else:
+            # filter out videos that do not have a similar length to the Spotify song
+            duration_tolerance = 10
+            max_duration_tolerance = 20
+            possible_videos_by_duration = list()
+
+            '''
+            start with a reasonable duration_tolerance, and increment duration_tolerance
+            until one of the Youtube results falls within the correct duration or
+            the duration_tolerance has reached the max_duration_tolerance
+            '''
+            while len(possible_videos_by_duration) == 0:
+                possible_videos_by_duration = list(filter(lambda x: abs(x['seconds'] - (int(meta_tags['duration_ms'])/1000)) <= duration_tolerance, videos))
+                duration_tolerance += 1
+                if duration_tolerance > max_duration_tolerance:
+                    log.error("{0} by {1} was not found.\n".format(meta_tags['name'], meta_tags['artists'][0]['name']))
+                    return None
+
+            result = possible_videos_by_duration[0]
+
+    if result:
+        url = "http://youtube.com/watch?v=" + result['link']
+    else:
+        url = None
+
+    return url