sorter.py

from server import *
import traceback

@app.route('/internal/sort/log')
@register_navbar('Sortierlog', icon='sort-by-attributes-alt')
@mod_required
def sort_log():
	return render_template('sortlog.html',sortlog=query('''
			SELECT 
				sortlog.*,
				lectures.id as lecture_id,
				lectures.title as lecture_title,
				lectures.course_id as course_id, 
				courses.title as course_title
			FROM sortlog 
			JOIN lectures ON lectures.id = sortlog.lecture_id
			JOIN courses ON courses.id = lectures.course_id 
			ORDER BY sortlog.`when` DESC
			LIMIT 50
		'''),sorterrorlog=query('SELECT * FROM sorterrorlog ORDER BY sorterrorlog.`when` DESC'))


def to_ascii(inputstring):
	asciistring = inputstring
	for charset in [('ä', 'ae'), ('ö', 'oe'), ('ü', 'ue'), ('ß', 'ss')]:
		asciistring = asciistring.replace(charset[0],charset[1])
	return asciistring

def insert_video(lectureid,dbfilepath,filepath,fileformatid):
	video_id = modify('''INSERT INTO videos_data 
		(lecture_id,visible,path,video_format,title,comment,internal,file_modified,time_created,time_updated,created_by,hash,file_size)
		VALUES 
		(?,0,?,?,"","","",?,?,?,?,"",?)''',
		lectureid, dbfilepath, fileformatid, datetime.now(), datetime.now(), datetime.now(), -1, os.stat(filepath).st_size)
	query('INSERT INTO sortlog (lecture_id,video_id,path,`when`) VALUES (?,?,?,?)', lectureid, video_id, dbfilepath, datetime.now())
	schedule_thumbnail(lectureid)

def schedule_thumbnail(lectureid):
	exists = query('SELECT * FROM jobs WHERE data LIKE ?','%"lectureid": "'+str(lectureid)+'"%' )
	if exists:
		return
	path = query('SELECT path FROM videos WHERE lecture_id')
	videos = query('''
			SELECT videos.path
			FROM videos
			JOIN formats ON (videos.video_format = formats.id)
			WHERE videos.lecture_id = ?
			ORDER BY formats.prio DESC''', lectureid )
	if videos:
		path = videos[0]['path']
	else:
		return
	data = '{"lectureid": "'+str(lectureid)+'", "path": "'+path+'"}'
	query('INSERT INTO jobs (type, data, time_created) VALUES ("thumbnail", ?, ?)', data, datetime.now());

@app.route('/internal/sort/now')
@mod_required
@sched_func(600)
def sort_now():
	courses = query('SELECT * FROM courses')
	formats = query('SELECT * FROM formats ORDER BY prio')
	for course in courses:
		modify('BEGIN')
		for mountpoint in config['VIDEOMOUNT']:
			existingvideos = query('SELECT videos.path FROM videos JOIN lectures ON (videos.lecture_id = lectures.id) WHERE lectures.course_id = ?',course['id'])
			knownerrors = query('SELECT sorterrorlog.path FROM sorterrorlog WHERE sorterrorlog.course_id = ?',course['id'])
			ignorefiles = existingvideos + knownerrors
			lectures = query('SELECT * from lectures where course_id = ?',course['id'])
			coursepath = mountpoint['mountpoint']+course['handle']
			try:
				files = os.listdir(coursepath)
			except FileNotFoundError:
				files = []
			for filename in files:
				try:
					# if the video is in the table "videos" already (with the correct course), skip it
					ignore = False
					for file_to_ignore in ignorefiles:
						# path is something like
						# vpnonline/08ws-swt/08ws-swt-081118.mp4
						if os.path.basename(filename) == os.path.basename(file_to_ignore['path']):
							ignore = True
							break
					if ignore:
						continue
					filepath = coursepath + '/' + filename
					# filenames: <handle>-<sorter>-<format>.mp4
					# "sorter" musst be found with fuzzy matching. "sorter" musst be one or more of the following types: (inside the loop)
					
					# '_' and ' ' are handled like '-'
					splitfilename = filename.replace('_','-').replace(' ','-').split('-')
					if not	os.path.splitext(filename)[1] == '.mp4':
						continue
					# we save all extraced data in a dict
					data = {'keywords': []}
					# parse the file name and save all data in 'data'
					for s in splitfilename:
						s = s.replace('.mp4','')
						#-<YYMMDD> (date)
						#-<HHMM> (time)
						#-<keyword>
						#	Looking for keywords in: title,speaker,comment, comma seperated list in internal
						try:
							if len(s) == 6:
								data['date'] = datetime.strptime(s,'%y%m%d').date()
							elif  len(s) == 4:
								data['time'] = datetime.strptime(s,'%H%M').time()
							else:	
								data['keywords'].append(s)
						except ValueError:
							# if its not a date or time, handle it as keyword
							data['keywords'].append(s)
					# try to match the file on a single lecture
					matches = []
					
					# first try date and time (if one of them is set)
					if ('date' in data) or ('time' in data):
						for lecture in lectures:
							if not ('time' in lecture) or not lecture['time']:
								continue
							if ('date' in data) and (lecture['time'].date() != data['date']):
									continue
							if ('time' in data) and (lecture['time'].time() != data['time']):
									continue
							matches.append(lecture)
					# if we can't match exactly  based on date and time, we have to match keywords
					if ((len(matches) != 1) and (len(data['keywords']) > 0)):
						#only test lectures with the correct date/time, if we have any. Else test for matches in all lectures of this course
						if len(matches) == 0:
							matches.extend(lectures)
						found = False
						for field in ['title','speaker','comment','internal']:
							for lecture in matches:
								for keyword in data['keywords']:
									# first test for exact match, else make it asci and try substring test
									if (keyword == lecture[field]) or \
									   (str(keyword).lower() in str(to_ascii(lecture[field]).lower())):
										found = True
										matches = [lecture]
									if found:
										break
								if found:
									break
							if found:
								break
					# now we should have found exactly one match
					dbfilepath = mountpoint['prefix']+course['handle']+'/'+filename
					if len(matches) == 1:
						# now match the format
						for videoformat in formats:
							#we match the last part of the file name without the extension
							formatstring = splitfilename[-1].split('.',1)[0].lower()
							if formatstring in videoformat['keywords'].replace(',',' ').split(' '):
								data['format'] = videoformat['id']
								break
						# default format is "unknown", with id 0
						if not 'format' in data:
							data['format'] = 0
						# insert the video into videos_data and log
						insert_video( matches[0]['id'], dbfilepath, filepath, data['format'])
					else:
						# if we couldn't match the video on exactly one lecture, log an error
						matches_id = []
						for match in matches:
							matches_id.append(str(match['id']))
						query('INSERT INTO sorterrorlog_data (course_id,path,matches,`when`,time_updated,time_created) VALUES (?,?,?,?,?,?)', course['id'], dbfilepath, ','.join(matches_id), datetime.now(), datetime.now(), datetime.now())
				except Exception:
					traceback.print_exc()

		
		modify('COMMIT')
	if 'ref' in request.values:
		return redirect(request.values['ref'])
	else:
		return 'OK',  200