From e4fc878577ffe69a9330533741953fb20b2aefc5 Mon Sep 17 00:00:00 2001
From: Christopher Usher <chrusher@gmail.com>
Date: Tue, 11 Jun 2019 02:27:39 +0100
Subject: [PATCH] logic of the post

---
 thrimshim/thrimshim/main.py | 124 +++++++++++++++++++++++-------------
 1 file changed, 79 insertions(+), 45 deletions(-)

diff --git a/thrimshim/thrimshim/main.py b/thrimshim/thrimshim/main.py
index dd59b58..43628e0 100644
--- a/thrimshim/thrimshim/main.py
+++ b/thrimshim/thrimshim/main.py
@@ -7,6 +7,7 @@ import gevent
 import gevent.backdoor
 from gevent.pywsgi import WSGIServer
 import flask
+from psycopg2 import sql
 
 import common
 from common import database
@@ -32,63 +33,96 @@ def cors(app):
 
 @app.route('/thrimshim/<uuid:ident>', methods=['GET', 'POST'])
 def thrimshim(ident):
+	"""Comunicate between Thrimbletrimmer and the Wubloader database."""
+	ident = str(ident)
 	if flask.request.method == 'POST':
 		row = flask.request.json
-	else:
-		conn = app.db_manager.get_conn()
-		with database.transaction(conn):
-			results = database.query(conn, 'SELECT * FROM events WHERE id = %s;', str(ident))
-		row = results.fetchone()
-		if row is None:
-			flask.abort(404)
-		response = row._asdict()
-		response = {key:(response[key].isoformat() if isinstance(response[key], datetime.datetime) else response[key]) for key in response.keys()}
-		return json.dumps(response)
+		return update_row(ident, row)
 
+	else:
+		return get_row(ident)
 		
 		
-
 def get_row(ident):
+	"""Gets the row from the database with id == ident."""
 	conn = app.db_manager.get_conn()
 	with database.transaction(conn):
-		results = database.query(conn, 'SELECT * FROM events WHERE id = %s;', str(ident))
-	row = results[0]
+		results = database.query(conn, """
+			SELECT *
+			FROM events
+			WHERE id = %s;""", ident)
+	row = results.fetchone()
+	if row is None:
+		return 'Row {} not found'.format(ident), 404
 	assert row.id == ident
 	response = row._asdict()
 	response = {key:(response[key].isoformat() if isinstance(response[key], datetime.datetime) else response[key]) for key in response.keys()}
-	return json.dump(response)
-
-
-#def query_database(ident):
-#
-#	select start, end, catagory, description, notes, video_title, video_description, video_start, video_end, state, error
-#	from database where id is ident
-#
-#def set_row(data):
-#	to_update = unjson(data)
-#
-#	update_database(to_update)
-#
-#def update_database(ident, to_update):
-#
-#	if state not in ['UNEDITED, EDITED, CLAIMED']:
-#		return 'Video already published'  
-#
-#	insert video_title, video_description, video_start, video_end
-#	#allow_holes, uploader_whitelist, upload_location
-#	into database where id == indent
-#
-#	set error to NULL
-#	set uploader to NULL
-#
-#	if upload_location:
-#		set state to 'DONE'
-#
-#	if publish:
-#		set state to 'EDITED'
-#	else:
-#		set state to 'UNEDITED'
+	return json.dumps(response)
+
+
+
+def update_row(ident, new_row):
+	"""Updates row of database with id == ident with the edit columns in
+	new_row.
+
+	If a 'video_link' is provided in uodate, interperate this as a manual video
+	upload and set state to 'DONE'"""
+
+	edit_columns = ['allow_holes', 'uploader_whitelist', 'upload_location',
+				'video_start', 'video_end', 'video_title', 'video_description',
+				'video_channel', 'video_quality']
+
+	row_keys = new_row.keys()
+	for column in edit_columns + ['state']:
+		if column not in row_keys:
+			return 'Missing {} from JSON'.format(column), 400
+
+	state_columns = ['state', 'uploader', 'error', 'video_link'] 
+
+	conn = app.db_manager.get_conn()
+	with database.transaction(conn):
+		results = database.query(conn, """
+			SELECT id, state
+			FROM events
+			WHERE id = %s;""", ident)
+	old_row = results.fetchone()
+	if old_row is None:
+		return 'Row {} not found'.format(ident), 404
+	assert old_row.id == ident
 	
+	if old_row.state not in ['UNEDITED', 'EDITED', 'CLAIMED']:
+		return 'Video already published', 400
+
+
+	if 'video_link' in new_row and new_row['video_link']:
+		new_row['state'] = 'DONE'
+		new_row['upload_location'] = 'manual'
+	else:
+		new_row['video_link'] = None
+		if new_row['state'] not in ['EDITED']:
+			new_row['state'] = 'UNEDITED'
+
+	new_row['uploader'] = None
+	new_row['error'] = None
+
+	columns = edit_columns + state_columns
+	build_query = sql.SQL("""
+		UPDATE events
+		set {}
+		WHERE id = %(id)s""").format(sql.SQL(", ").join(
+			sql.SQL("{} = {}").format(
+				sql.Identifier(column), sql.Placeholder(column),
+			) for column in columns
+		))
+	kwargs = {column:new_row[column] for column in columns}
+	kwargs['id'] = ident
+	with database.transaction(conn):
+		result = database.query(conn, build_query, **kwargs)
+	if result.rowcount != 1:
+		raise Exception('No row with id {} to update'.format(ident))
+			
+	logging.info('Row {} updated to state {}'.format(ident, new_row['state']))
+	return 'Row updated'
 
 
 def main(host='0.0.0.0', port=8004, connection_string='', backdoor_port=0):