def admin_userpermission_change(token, u_id, permission_id):
'''
This is the function file for admin_userpermission_change
'''
# Checks
curr_user_id = token_to_user(token)
check_valid_user(curr_user_id)
check_valid_user(u_id)
# Ensure that the permission_id is valid
if permission_id not in [1, 2, 3]:
raise ValueError('The permission_id is invalid')
# This block details permissions
# The owner can do anything:
if server_data.data['users'][curr_user_id]['permission'] == 1:
pass
# cannot target the owner
elif server_data.data['users'][u_id]['permission'] == 1:
raise AccessError('Cannot change the owners permission')
# must be an admin or owner
elif not is_slackr_admin(curr_user_id):
raise AccessError('User does not have the correct permissions')
# target user alreay has the permission_id
elif server_data.data['users'][u_id]['permission'] == permission_id:
raise ValueError('The target user already has that permission')
else:
pass
# set the permission
server_data.data['users'][u_id]['permission'] = permission_id
return {}
def channel_create(token, name, is_public):
'''
The following function creates a channel
'''
# tests for name
is_valid_name(name)
if is_public == "true":
public_bool = True
elif is_public == "false":
public_bool = False
else:
raise ValueError("Is_public must be true or false")
# generates current user id from token
curr_user_id = token_to_user(token)
check_valid_user(curr_user_id)
# generates a channel_id and assigns it to a variable
channel_id = server_data.data["n_channels"]
# appending a dictionary containing channel details into "channels"
server_data.data["channels"].append({
"channel_id":
channel_id,
"name":
name,
"members": [{
"u_id": curr_user_id,
"channel_permission": 1
}],
"messages": [],
"is_public":
public_bool,
"channel_n_messages":
0
})
# add all slackr owner / admins into the channel
for user in server_data.data['users']:
if is_slackr_admin(user['u_id']) and (user['u_id'] != curr_user_id):
server_data.data['channels'][channel_id]['members'].append({
"u_id":
user['u_id'],
"channel_permission":
1
})
server_data.data['users'][user['u_id']]['channels'].append(
channel_id)
# appending a dictionary containing channel details into 'channels' within "users"
server_data.data['users'][curr_user_id]['channels'].append(channel_id)
# increasing n_channels by one
server_data.data["n_channels"] = ((server_data.data["n_channels"]) + 1)
# returning channel_id
return channel_id
def channel_invite(token, channel_id, u_id):
'''
The following function invites a given user into a given channel
'''
# may need to alter this so that only AUTHORISED members can invite others
# Perform required checks
check_valid_channel(channel_id)
curr_user_id = token_to_user(token)
check_valid_user(curr_user_id)
check_valid_user(u_id)
# Check the current user is actually a member of target channel
if not check_channel_member(curr_user_id, channel_id):
raise AccessError('User is not part of the target channel')
# Check the target user is not already a member of target channel
if check_channel_member(u_id, channel_id):
raise ValueError(
'Target user is already a member of the target channel')
# If it reaches here, all parameters are valid
# target user becomes a member of the channel
for channel in server_data.data['channels']:
if channel['channel_id'] == channel_id:
channel['members'].append({'u_id': u_id, 'channel_permission': 0})
break
# channel is in the user's channel list
for user in server_data.data['users']:
if user['u_id'] == u_id:
user['channels'].append(channel_id)
break
return {}
def channel_messages(token, channel_id, start):
'''
The following function shows up to 50 messages in a given channel
'''
# check token
curr_user_id = token_to_user(token)
# Check if the user exists
check_valid_user(curr_user_id)
check_valid_channel(channel_id)
cha_data = server_data.data['channels'][channel_id]
if not check_channel_member(curr_user_id,
channel_id) and not cha_data['is_public']:
raise AccessError('User is not in the target channel. Error code: 1')
#tests for validity of token, channel_id and start
# checks if start is valid else raise error
valid_start(start)
if start >= (
server_data.data["channels"][channel_id]["channel_n_messages"]):
raise ValueError("Start is greater than total number of messages")
# checks if channel_id is valid else raise error
channel_id_exists(channel_id)
return_amount = 49
messages = []
actual_start = server_data.data["channels"][channel_id][
"channel_n_messages"] - start - 1
counter = actual_start
if actual_start > return_amount:
last = actual_start - return_amount
for counter in range(actual_start, last, -1):
messages.append(
server_data.data["channels"][channel_id]["messages"][counter])
end = start + return_amount
else:
end = -1
while counter > -1:
messages.append(
server_data.data["channels"][channel_id]["messages"][counter])
counter = counter - 1
# return correct react types
for msg in messages:
for react in msg['reacts']:
if curr_user_id in react['u_ids']:
react['is_this_user_reacted'] = True
else:
react['is_this_user_reacted'] = False
return {'messages': messages, 'start': start, 'end': end}
def message_unreact(token, message_id, react_id):
'''
This function unreacts to a message
'''
curr_user_id = token_to_user(token)
message = get_msg_dict(message_id)
channel = msg_to_channel(message_id)
# check if the message_id is valid
if message_id >= server_data.data["n_messages"]:
raise ValueError("message_id is invalid")
is_msg_removed(message_id)
# check if the user is valid
check_valid_user(curr_user_id)
# check if the channel is valid
check_valid_channel(channel["channel_id"])
# check if the user is in the channel
if not check_channel_member(curr_user_id, channel["channel_id"]):
raise AccessError("User is not a member of the channel")
# check if the react_id is valid, only 1 in iteration 2
react_id_list = [1]
if react_id not in react_id_list:
raise ValueError("React ID is not valid")
# check if the message already has the react_id
# check if the user has reacted to that message
present_flag = 0
for react_dict in message['reacts']:
if react_dict['react_id'] == react_id:
present_flag = 1
if curr_user_id in react_dict['u_ids']:
# the current user has reacted
react_dict['u_ids'].remove(curr_user_id)
if len(react_dict['u_ids']) == 0:
# remove react entirely if no more members
del react_dict
if present_flag == 0:
raise ValueError("Message does not have that react")
return {}
def channel_details(token, channel_id):
'''
The following function gives details about a given channel
'''
# check token
curr_user_id = token_to_user(token)
# Check if the user exists
check_valid_user(curr_user_id)
check_valid_channel(channel_id)
channel_data = server_data.data['channels'][channel_id]
if not check_channel_member(curr_user_id,
channel_id) and not channel_data['is_public']:
raise AccessError('User is not in the target private channel')
# Return channel details
# format: { name, owner_members, all_members }
# add owner and all members
owner_members = []
all_members = []
for member in channel_data['members']:
user = server_data.data['users'][member['u_id']]
all_members.append({
'u_id': user['u_id'],
'name_first': user['name_first'],
'name_last': user['name_last'],
'profile_img_url': user['profile_img_url']
})
if member['channel_permission'] == 1:
owner_members.append({
'u_id': user['u_id'],
'name_first': user['name_first'],
'name_last': user['name_last'],
'profile_img_url': user['profile_img_url']
})
return ({
'name': channel_data['name'],
'owner_members': owner_members,
'all_members': all_members
})
def message_react(token, message_id, react_id):
'''
This function reacts to a message
'''
curr_user_id = token_to_user(token)
message = get_msg_dict(message_id)
channel = msg_to_channel(message_id)
# check if the message_id is valid
if message_id >= server_data.data["n_messages"]:
raise ValueError("message_id is invalid")
is_msg_removed(message_id)
# check if the user is valid
check_valid_user(curr_user_id)
# check if the channel is valid
check_valid_channel(channel["channel_id"])
# check if the user is in the channel
if not check_channel_member(curr_user_id, channel["channel_id"]):
raise AccessError("User is not a member of the channel")
# check if the react_id is valid, only 1 in iteration 2
react_id_list = [1]
if react_id not in react_id_list:
raise ValueError("React ID is not valid")
# if the message already has the react id
for react in message["reacts"]:
if react['react_id'] == react_id:
# check if the current user has already reacted
if curr_user_id in react['u_ids']:
raise ValueError("Message already reacted by current user")
# react to the message!
react['u_ids'].append(curr_user_id)
return {}
# otherwise, the message has not been reacted too
message['reacts'].append({'react_id': react_id, 'u_ids': [curr_user_id]})
return {}
def channel_removeowner(token, channel_id, u_id):
'''
Using a valid token, remove a users permission as an owner in a specified channel
Raises errors if:
- Channel doesn't exist
- the user is already an not an owner of that channel
- token's user doesn't have permission to remove owners
'''
is_valid_token(token)
check_valid_user(u_id)
token_id = token_to_user(token)
check_valid_user(token_id)
check_valid_channel(channel_id)
if not check_channel_member(u_id, channel_id):
raise ValueError('Target user is not in the channel')
# User is already not an owner of that channel
if not is_owner(u_id, channel_id):
raise ValueError('User is already not an owner')
curr_user_id = token_to_user(token)
# When user is not an admin or owner, only owners can remove other owners (AccessError)
if not is_owner(curr_user_id,
channel_id) and not is_slackr_admin(curr_user_id):
raise AccessError('You do not have permission to remove this owner')
if server_data.data['users'][u_id]['permission'] == 1:
raise AccessError('Cannot change the permission of Slackr creator')
# Remove user permission as owner
# get members list (from channel_id)
members = members_list(channel_id)
# change user permission to '0'
for member in members:
if member['u_id'] == u_id:
member['channel_permission'] = 0
def message_sendlater(token, channel_id, message, time_sent):
'''
Using a valid token, the user sends a message to a channel that they are part of
at a specific time in the future
'''
if not channel_exists(channel_id):
raise ValueError(f"channel does not exist")
if message is None:
raise ValueError(f"No message")
if int(time_sent) < t.time():
raise ValueError(f"Time is in the past")
is_valid_token(token)
is_valid_message(message)
curr_user_id = token_to_user(token)
check_valid_user(curr_user_id)
if not check_channel_member(curr_user_id, channel_id):
raise AccessError(
f"User is not part of specified channel. Please join the channel.")
message_id = server_data.data['n_messages']
server_data.data['n_messages'] += 1
messages_later = server_data.messages_later
new_message = dict()
new_message['message_id'] = message_id
new_message['u_id'] = curr_user_id
new_message['message'] = message
new_message['time_created'] = int(time_sent)
new_message['channel_id'] = channel_id
new_message['reacts'] = []
new_message['is_pinned'] = False
messages_later.append(dict(new_message))
return message_id
def message_send(token, channel_id, message):
'''
Using a valid token, the user sends a message to a channel that they are part of
'''
curr_user_id = token_to_user(token)
check_valid_user(curr_user_id)
if not channel_exists(channel_id):
raise ValueError(f"channel does not exist")
if message is None:
raise ValueError(f"No message")
if len(message) > 1000:
raise ValueError(f"Message cannot be over 1000 characters")
if not check_channel_member(curr_user_id, channel_id):
raise AccessError(
f"User is not part of specified channel. Please join the channel.")
info = channel_info(channel_id)
messages = info['messages']
message_id = server_data.data['n_messages']
server_data.data['n_messages'] += 1
new_message = dict()
new_message['message_id'] = message_id
new_message['u_id'] = curr_user_id
new_message['message'] = message
new_message['time_created'] = int(t.time())
new_message['reacts'] = []
new_message['is_pinned'] = False
server_data.data["channels"][channel_id]["channel_n_messages"] += 1
messages.append(dict(new_message))
return message_id
def message_pin(token, message_id):
'''
The following function pins a message
'''
curr_user_id = token_to_user(token)
message = get_msg_dict(message_id)
channel = msg_to_channel(message_id)
# check if the message_id is valid
if message_id >= server_data.data["n_messages"]:
raise ValueError("message_id is invalid")
is_msg_removed(int(message_id))
# check if the user is valid
check_valid_user(curr_user_id)
# check if the channel is valid
check_valid_channel(channel["channel_id"])
# check if the user is in the channel
if not check_channel_member(curr_user_id, channel["channel_id"]):
raise AccessError("User is not a member of the channel")
# User must be a admin of either the channel or slackr
check_permission = server_data.data["users"][curr_user_id]["permission"]
check_isowner = is_owner(curr_user_id, channel["channel_id"])
if (not check_isowner) and check_permission == 3:
raise ValueError("User is not authorised for this action")
# check if the message is already pinned
if message["is_pinned"]:
raise ValueError("Message is already pinned")
message["is_pinned"] = True
return {}
def message_edit(token, message_id, message):
'''
The following function edits a message
'''
curr_user_id = token_to_user(token)
check_valid_user(curr_user_id)
# if message too long / not a string
is_valid_message(message)
message_dict = get_msg_dict(message_id)
# check if the message exists
is_msg_removed(message_id)
# Check if message is the same
msg_str = (get_msg_dict(message_id))['message']
if msg_str == message:
raise ValueError(f"Message is the same")
channel = msg_to_channel(message_id)
check_channel_member(curr_user_id, channel['channel_id'])
if message_dict['u_id'] == curr_user_id:
pass
elif is_slackr_admin(curr_user_id):
pass
elif is_owner(curr_user_id, channel['channel_id']):
pass
else:
raise AccessError('User does not have the right permission')
if message == "":
message_remove(token, message_id)
else:
message_dict['message'] = message
return {}
def message_remove(token, message_id):
'''
The following function removes a message @@ can change to remove completely
'''
curr_user_id = token_to_user(token)
check_valid_user(curr_user_id)
message = get_msg_dict(message_id)
# check if the message exists
is_msg_removed(message_id)
channel = msg_to_channel(message_id)
check_channel_member(curr_user_id, channel['channel_id'])
# if the message was sent by the user
if message['u_id'] == curr_user_id:
pass
# if the current user is a owner of the channel
elif is_slackr_admin(curr_user_id):
pass
elif is_owner(curr_user_id, channel['channel_id']):
pass
else:
raise AccessError('User does not have the right permission')
# decrease the channel_n_messages and n_messages
channel["channel_n_messages"] -= 1
# deleting message
for i in range(len(channel['messages'])):
if channel['messages'][i]['message_id'] == int(message_id):
del channel['messages'][i]
break
return {}
def user_profiles_uploadphoto(token, img_url, x_start, y_start, x_end, y_end):
'''
Given a URL of an image on the internet, crops the image within bounds
(x_start, y_start) and (x_end, y_end).
Position (0,0) is the top left.
'''
curr_user_id = token_to_user(token)
check_valid_user(curr_user_id)
# checks if img_url is valid
is_valid_url(img_url)
# retrieving the url
filepath = './static/' + token + '.jpg'
urllib.request.urlretrieve(img_url, filepath)
# opening the file for cropping
Image.open(filepath).convert('RGB').save(filepath)
img = Image.open(filepath)
# crop length must be withing dimensions of the image
width, height = img.size
if (x_start < 0 or y_start < 0 or x_end > width or y_end > height):
raise ValueError(
"x_start, y_start, x_end and y_end must be within the dimensions of the image"
)
if (x_start > x_end or y_start > y_end):
raise ValueError("x_start and y_start must be smaller than x_end and y_end respectively")
# cropping image
cropped = img.crop((x_start, y_start, x_end, y_end))
cropped.save(filepath)
return {}
def channel_addowner(token, channel_id, u_id):
'''
Using a valid token, add a user specified by 'u_id' as an owner of a specific channel
Raises errors if:
- Channel doesn't exist
- the user is already an owner of that channel
- token's user doesn't have permission to assign owners
'''
is_valid_token(token)
check_valid_user(u_id)
token_id = token_to_user(token)
check_valid_user(token_id)
check_valid_channel(channel_id)
if not check_channel_member(u_id, channel_id):
raise ValueError('Target user is not in the channel')
# When user is not an admin or owner, only owners can add other owners (AccessError)
if not is_owner(token_id, channel_id) and not is_slackr_admin(token_id):
raise AccessError('You do not have permission to assign an owner')
# User is already an owner of that channel
if is_owner(u_id, channel_id):
raise ValueError('User is already an owner')
# Change user permission to owner
# get members list (from channel_id)
members = members_list(channel_id)
# change user permission to '1'
for member in members:
if member['u_id'] == u_id:
member['channel_permission'] = 1
