def receive_message(self, sender_client, message):
if message.command == "READ":
# return the content of the requested address
if FileManager.file_exists(message.network_path):
page_content = FileManager.file_read(message.network_path)
message.command = "READ_RESULT"
message.content = page_content
else:
# specific message when the page does not exist yet
message.command = "NOT_EXISTING"
message.content = ""
sender_client.send_message(message)
elif message.command == "WRITE":
# TODO: handle writing errors
page_content, change_comment = message.content
# add a new entry to the log file
filelog = FileChangeLog(message.network_path)
filelog.add_log(message.username, change_comment)
filelog.save()
# add a new version of the file in the history files
new_idx = filelog.lastlog_index()
oldfilename = message.network_path + ".old" + str(new_idx)
FileManager.file_write(oldfilename, page_content)
# write the new content at the address
FileManager.file_write(message.network_path, page_content)
# send a message indicating that writing is done
message = NetworkMessage(message.network_path, "WRITE_DONE", "")
sender_client.send_message(message)
elif message.command == "READ_LOG":
if FileManager.file_exists(message.network_path):
filelog = FileChangeLog(message.network_path)
if filelog != []:
message.command = "READ_LOG_RESULT"
message.content = filelog.changelog
sender_client.send_message(message)
else:
# TODO : error case not supposed to happen (log should exist when the page exists)
pass
else:
# specific message when the page does not exist yet
pass
def read(self):
log_path = self.filename + ".log"
if FileManager.file_exists(log_path):
self.changelog = FileManager.file_read(log_path)
