Add title and description header/footer in thrimshim instead of cutter

This accomplishes two things:
1. It allows thrimshim to properly validate length restrictions (not implemented yet)
2. It means that the database has a record of the values actually written for each of these rows,
instead of that information depending on how the cutter was configured at the time.

cutter/cutter/main.py

@@ -73,7 +73,7 @@ class Cutter(object):
 	ERROR_RETRY_INTERVAL = 5
 	RETRYABLE_UPLOAD_ERROR_WAIT_INTERVAL = 5
 
-	def __init__(self, upload_locations, dbmanager, stop, name, segments_path, tags, title_header, description_footer):
+	def __init__(self, upload_locations, dbmanager, stop, name, segments_path, tags):
 		"""upload_locations is a map {location name: upload location backend}
 		Conn is a database connection.
 		Stop is an Event triggering graceful shutdown when set.
@@ -86,8 +86,6 @@ class Cutter(object):
 		self.stop = stop
 		self.segments_path = segments_path
 		self.tags = tags
-		self.title_header = title_header
-		self.description_footer = description_footer
 		self.logger = logging.getLogger(type(self).__name__)
 		self.refresh_conn()
 
@@ -338,14 +336,8 @@ class Cutter(object):
 			# a second try around the whole thing.
 			try:
 				video_id, video_link = upload_backend.upload_video(
-					title=(
+					title=job.video_title,
-						"{} - {}".format(self.title_header, job.video_title)
+					description=job.video_description,
-						if self.title_header else job.video_title
-					),
-					description=(
-						"{}\n\n{}".format(job.video_description, self.description_footer)
-						if self.description_footer else job.video_description
-					),
 					# Add category and sheet_name as tags
 					tags=self.tags + [job.category, job.sheet_name],
 					data=upload_wrapper(),
@@ -524,8 +516,6 @@ def main(
 	name=None,
 	base_dir=".",
 	tags='',
-	title_header="",
-	description_footer="",
 	metrics_port=8003,
 	backdoor_port=0,
 ):
@@ -552,17 +542,6 @@ def main(
 	name defaults to hostname.
 
 	tags should be a comma-seperated list of tags to attach to all videos.
-
-	title_header will be prepended to all video titles, seperated by a " - ".
-	description_footer will be added as a seperate paragraph at the end of all video descriptions.
-	For example, with --title-header foo --description-footer 'A video of foo.',
-	then a video with title 'bar' and a description 'Bar with baz' would actually have:
-		title: foo - bar
-		description:
-			Bar with baz
-
-			A video of foo.
-
 	"""
 	common.PromLogCountsHandler.install()
 	common.install_stacksampler()
@@ -620,7 +599,7 @@ def main(
 		if backend.needs_transcode and not no_transcode_check:
 			needs_transcode_check.append(backend)
 
-	cutter = Cutter(upload_locations, dbmanager, stop, name, base_dir, tags, title_header, description_footer)
+	cutter = Cutter(upload_locations, dbmanager, stop, name, base_dir, tags)
 	transcode_checkers = [
 		TranscodeChecker(backend, dbmanager, stop)
 		for backend in needs_transcode_check

docker-compose.jsonnet

@@ -194,8 +194,6 @@
         "--base-dir", "/mnt",
         "--backdoor-port", std.toString($.backdoor_port),
         "--tags", std.join(",", $.video_tags),
-        "--title-header", $.title_header,
-        "--description-footer", $.description_footer,
         $.db_connect,
         std.manifestJson($.cutter_config),
         "/etc/wubloader-creds.json",
@@ -219,6 +217,8 @@
       // Args for the thrimshim: database connection string 
       command: [
         "--backdoor-port", std.toString($.backdoor_port),
+        "--title-header", $.title_header,
+        "--description-footer", $.description_footer,
         $.db_connect,
         $.channel,
         $.bustime_start,

thrimshim/thrimshim/main.py

@@ -141,6 +141,21 @@ def get_row(ident):
 	if response["video_channel"] is None:
 		response["video_channel"] = app.default_channel
 	response["bustime_start"] = app.bustime_start
+
+	# remove any added headers or footers so round-tripping is a no-op
+	if (
+		app.title_header is not None
+		and response["video_title"] is not None
+		and response["video_title"].startswith(app.title_header + ' - ')
+	):
+		response["video_title"] = response["video_title"][len(app.title_header + ' - '):]
+	if (
+		app.description_footer is not None
+		and response["video_description"] is not None
+		and response["video_description"].endswith('\n\n' + app.description_footer)
+	):
+		response["video_description"] = response["video_description"][:-len('\n\n' + app.description_footer)]
+
 	logging.info('Row {} fetched'.format(ident))
 	return json.dumps(response)
 
@@ -205,6 +220,12 @@ def update_row(ident, editor=None):
 	new_row['editor'] = editor
 	new_row['edit_time'] = datetime.datetime.utcnow()
 
+	# Include headers and footers
+	if app.title_header is not None and 'video_title' in new_row:
+		new_row['video_title'] = '{} - {}'.format(app.title_header, new_row['video_title'])
+	if app.description_footer is not None and 'video_description' in new_row:
+		new_row['video_description'] = '{}\n\n{}'.format(new_row['video_description'], app.description_footer)
+
 	# actually update database
 	build_query = sql.SQL("""
 		UPDATE events
@@ -275,14 +296,18 @@ def reset_row(ident, editor=None):
 @argh.arg('bustime-start', help='The start time in UTC for the event, for UTC-Bustime conversion')
 @argh.arg('--backdoor-port', help='Port for gevent.backdoor access. By default disabled.')
 @argh.arg('--no-authentication', help='Do not authenticate')
+@argh.arg('--title-header', help='A header to prefix all titles with, seperated from the submitted title by " - "')
+@argh.arg('--description-footer', help='A footer to suffix all descriptions with, seperated from the submitted description by a blank line.')
 def main(connection_string, default_channel, bustime_start, host='0.0.0.0', port=8004, backdoor_port=0,
-	no_authentication=False):
+	no_authentication=False, title_header=None, description_footer=None):
 	"""Thrimshim service."""
 	server = WSGIServer((host, port), cors(app))
 
 	app.no_authentication = no_authentication
 	app.default_channel = default_channel
 	app.bustime_start = bustime_start
+	app.title_header = title_header
+	app.description_footer = description_footer
 
 	stopping = gevent.event.Event()
 	def stop():