def search(token, query_str):
"""Given a query string, return a collection of messages in all of the
channels that the user has joined that match the query"""
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
# If the query is whitespace
if (query_str.isspace() or len(query_str) == 0):
return {"messages": []}
u_id = jwt_handler.decode_token(token)
result = []
for channel in database.get_all_channels():
if u_id in channel["auth_ids"]:
for message_id in channel["messages"]:
message = database.get_message_by_id(message_id)
if query_str in message["message"]:
# Create output-able list of reacts
react_list = get_react_list(message, u_id)
# Write to file
time_created = json_time_translator.json_to_timestamp(
message["time_created"])
result_entry = {
"message_id": message_id,
"u_id": message["u_id"],
"message": message["message"],
"time_created": time_created,
"reacts": react_list,
"is_pinned": message["is_pinned"]
}
result.append(result_entry)
return {"messages": result}
def message_pin(token, message_id):
"""
Given a message within a channel, mark it as "pinned" to be given special
display treatment by the frontend
"""
# Validate token
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
# Decode token
u_id = jwt_handler.decode_token(token)
user = database.get_user_by_id(u_id)
message = database.get_message_by_id(message_id)
if message is None:
raise ValueError(MESSAGE_PIN_NOT_EXIST)
channel = database.get_channel_by_id(message["channel_id"])
if user["permission"] not in [OWNER, ADMIN] \
and u_id not in channel["owner_ids"]:
raise ValueError(MESSAGE_PIN_NO_AUTH)
# Checking data
if u_id not in channel["auth_ids"]:
raise AccessError(CHANNEL_CANT_VIEW_DETAIL)
if message["is_pinned"] is True:
raise ValueError(MESSAGE_ALREADY_PINNED)
# Pinning message
database.update_message_by_id(message_id, {"is_pinned": True})
return {}
def message_remove(token, message_id):
"""
Given a message_id for a message, this message is removed from the chxnel
"""
# Validate token
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
if not isinstance(message_id, int):
message_id = int(message_id)
# Convert token to u_id
u_id = jwt_handler.decode_token(token)
# Check u_id is authorised
user = database.get_user_by_id(u_id)
message = database.get_message_by_id(message_id)
if message is None:
raise ValueError(MESSAGE_REMOVE_NOT_EXIST)
channel_id = message["channel_id"]
channel = database.get_channel_by_id(channel_id)
# if sender of message
if u_id == message["u_id"] or\
user["permission"] in [OWNER, ADMIN] or\
u_id in channel["owner_ids"]:
# Delete message from database
database.delete_message_by_id(message_id)
# Delete message from channel
channel["messages"].remove(message_id)
database.update_channel_by_id(channel_id, channel)
return {}
raise AccessError(MESSAGE_EDIT_NO_AUTH)
def message_edit(token, message_id, message):
"""Given a message, update it's text with new text"""
# Validate token
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
# If the message is empty, perform deletion instead
if message == "":
return message_remove(token, message_id)
if not validator.is_valid_message(message):
raise ValueError(INVALID_MESSAGE)
# Convert token to u_id
u_id = jwt_handler.decode_token(token)
user = database.get_user_by_id(u_id)
message_dict = database.get_message_by_id(message_id)
if message_dict is None:
raise ValueError(MESSAGE_EDIT_NOT_EXIST)
channel_id = message_dict["channel_id"]
channel = database.get_channel_by_id(channel_id)
# Check if user can edit this message
if u_id == message_dict["u_id"] or user["permission"] in [OWNER, ADMIN] \
or u_id in channel["owner_ids"]:
database.update_message_by_id(message_id, {"message": message})
return {}
raise AccessError(MESSAGE_EDIT_NO_AUTH)
def channel_join(token, channel_id):
"""Given a channel_id of a channel that the authorised user can join, adds
them to that channel"""
# Validate token and channel ID
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
if not validator.is_valid_channel(channel_id):
raise ValueError(INVALID_CHANNEL)
# Convert token to u_id
u_id = jwt_handler.decode_token(token)
user = database.get_user_by_id(u_id)
# Locate channel in database
channel = database.get_channel_by_id(channel_id)
# If channel is private
if not channel["is_public"] and user["permission"] == MEMBER:
# If the user is not an admin/owner
raise AccessError(CHANNEL_CANT_VIEW_DETAIL)
# Add user to authorised users in channel
auth_list = channel["auth_ids"]
if u_id not in auth_list:
auth_list.append(u_id)
database.update_channel_by_id(channel_id, {
"auth_ids": auth_list
})
else:
raise ValueError(CHANNEL_ALREADY_JOINED)
return {}
def admin_userpermission_change(token, u_id, permission_id):
"""Given a User by their user ID, set their permissions to new permissions
described by permission_id"""
permission_id = int(permission_id)
# Check validity
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
if not validator.is_valid_user(u_id):
raise ValueError(INVALID_USER)
if permission_id not in [OWNER, ADMIN, MEMBER]:
raise ValueError(INVALID_PERM_ID)
# Get users
user_acting = database.get_user_by_id(jwt_handler.decode_token(token))
user_target = database.get_user_by_id(u_id)
# Check that token has valid permissions for this permission id, then make
# the change
if user_acting["permission"] == OWNER:
# Owners can do anything
database.update_user_by_id(u_id, {"permission": permission_id})
elif user_acting["permission"] == ADMIN and\
user_target["permission"] != OWNER and\
permission_id != OWNER:
database.update_user_by_id(u_id, {"permission": permission_id})
else:
raise AccessError(NO_PERMISSION)
return {}
def channel_removeowner(token, channel_id, u_id):
"""Remove user with user id u_id an owner of this channel"""
# Convert channel_id and u_id to integer
channel_id = int(channel_id)
u_id = int(u_id)
# Validate token, channel and user
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
if not validator.is_valid_channel(channel_id):
raise ValueError(INVALID_CHANNEL)
if not validator.is_valid_user(u_id):
raise ValueError(INVALID_USER)
# Locate channel and user in database
channel = database.get_channel_by_id(channel_id)
auth_user_id = jwt_handler.decode_token(token)
auth_user = database.get_user_by_id(auth_user_id)
owner_list = channel["owner_ids"]
if auth_user["permission"] not in [OWNER, ADMIN] or\
auth_user_id not in channel["owner_ids"]:
raise AccessError(CHANNEL_DEL_OWNER_NO_AUTH)
# Check that the added_user is currently an owner
if u_id not in owner_list:
raise ValueError(CHANNEL_NOT_OWNER)
# Remove user from owner_ids
owner_list.remove(u_id)
database.update_channel_by_id(channel_id, {
"owner_ids": owner_list
})
return {}
def channel_leave(token, channel_id):
"""Given a channel ID, the user removed as a member of this channel"""
# Validate token and channel ID
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
if not validator.is_valid_channel(channel_id):
raise ValueError(INVALID_CHANNEL)
# Convert token to u_id
u_id = jwt_handler.decode_token(token)
# Locate channel
channel = database.get_channel_by_id(channel_id)
# Validate user is in channel
auth_list = channel["auth_ids"]
if u_id not in auth_list:
raise AccessError(NOT_IN_CHANNEL)
# Remove user from auth_list
auth_list.remove(u_id)
database.update_channel_by_id(channel_id, {
"auth_ids": auth_list
})
# If owner, remove from owner_list
owner_list = channel["owner_ids"]
if u_id in owner_list:
owner_list.remove(u_id)
database.update_channel_by_id(channel_id, {
"owner_ids": owner_list
})
return {}
def channel_invite(token, channel_id, u_id):
"""Invites a user (with user id u_id) to join a channel with ID channel_id.
Once invited the user is added to the channel immediately"""
# Convert channel_id and u_id to integer
channel_id = int(channel_id)
u_id = int(u_id)
# Validate token, channel and user
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
if not validator.is_valid_channel(channel_id):
raise ValueError(INVALID_CHANNEL)
if not validator.is_valid_user(u_id):
raise ValueError(INVALID_USER)
# Find invitor
invitor_id = jwt_handler.decode_token(token)
# Locate channel in database
channel = database.get_channel_by_id(channel_id)
# Check that the invitor is authorised
auth_list = channel["auth_ids"]
if invitor_id not in auth_list:
raise AccessError(CHANNEL_INV_NO_AUTH)
if u_id in auth_list:
raise ValueError(CHANNEL_ALREADY_JOINED)
auth_list.append(u_id)
database.update_channel_by_id(channel_id, {
"auth_ids": auth_list
})
return {}
def message_unpin(token, message_id):
"""Given a message within a channel, remove it's mark as unpinned"""
# Validate token
if not validator.is_valid_token(token):
raise ValueError(INVALID_TOKEN)
# Decode token
u_id = jwt_handler.decode_token(token)
user = database.get_user_by_id(u_id)
message = database.get_message_by_id(message_id)
if message is None:
raise ValueError(MESSAGE_UNPIN_NOT_EXIST)
channel = database.get_channel_by_id(message["channel_id"])
if user["permission"] not in [OWNER, ADMIN] \
and u_id not in channel["owner_ids"]:
raise AccessError(MESSAGE_UNPIN_NO_AUTH)
# Checking data
if u_id not in channel["auth_ids"]:
raise AccessError(CHANNEL_CANT_VIEW_DETAIL)
if message["is_pinned"] is False:
raise ValueError(MESSAGE_NOT_PINNED)
# Unpinning message
database.update_message_by_id(message_id, {"is_pinned": False})
return {}
def message_sendlater(token, channel_id, message, time_sent):
"""
Send a message from authorised_user to the channel specified by channel_id
"""
# Validate data
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
if not validator.is_valid_message(message):
raise ValueError(INVALID_MESSAGE)
# Convert token to u_id
u_id = jwt_handler.decode_token(token)
# Check channel exists
channel = database.get_channel_by_id(channel_id)
if channel is None:
raise ValueError(INVALID_CHANNEL)
# Read time_sent
time_to_send = json_time_translator.timestamp_to_datetime(time_sent)
# Check time_to_send is not in the past
if time_to_send <= datetime.utcnow():
raise ValueError(MESSAGE_TIME_INVALID)
if u_id not in channel["auth_ids"]:
raise AccessError(MESSAGE_SEND_NO_AUTH)
# Create message
message_id = database.add_message({
"u_id":
u_id,
"message":
message,
"channel_id":
int(channel_id),
"time_created":
json_time_translator.datetime_to_json(time_to_send),
"is_pinned":
False,
"reacts": []
})
# Insert into channel's list of messages in order of time
message_id_list = channel["messages"]
inserted = False
for i in reversed(range(len(message_id_list))):
json_time = database.get_message_by_id(
message_id_list[i])["time_created"]
timestamp = json_time_translator.json_to_timestamp(json_time)
if timestamp <= int(float(time_sent)):
message_id_list.insert(i + 1, message_id)
inserted = True
break
if inserted is False:
message_id_list.insert(0, message_id)
database.update_channel_by_id(channel_id, {"messages": message_id_list})
return {"message_id": message_id}
def is_valid_token(token):
"""Returns whether or not a token is valid: that the signature is valid and that
it is an actively listed token under the user's data file"""
u_id = jwt_handler.decode_token(token)
if u_id is None:
return False
user = database.get_user_by_id(u_id)
if user is None:
return False
for active_token in user["tokens"]:
if active_token == token:
return True
return False
def message_react(token, message_id, react_id):
"""
Given a message within a channel the authorised user is part of, add a
"react" to that particular message
"""
# Validate
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
# Decode token
u_id = jwt_handler.decode_token(token)
# Change react_id to an integer
if not isinstance(react_id, int):
react_id = int(react_id)
if not isinstance(message_id, int):
message_id = int(message_id)
# Validate data
message = database.get_message_by_id(message_id)
channel = database.get_channel_by_id(message["channel_id"])
if u_id not in channel["auth_ids"]:
raise AccessError(CHANNEL_CANT_VIEW_DETAIL)
if react_id != 1:
print(react_id)
raise ValueError(INVALID_REACT)
react_id_exists = False
for react in message["reacts"]:
if react_id == react["react_id"]:
react_id_exists = True
if u_id in react["u_id"]:
raise ValueError(MESSAGE_ALREADY_REACTED)
break
# Add react to message
react_list = message["reacts"]
if not react_id_exists:
react_list.append({"react_id": react_id, "u_id": [u_id]})
else:
for react in react_list:
if react_id == react["react_id"]:
react["u_id"].append(u_id)
break
database.update_message_by_id(message_id, {"reacts": react_list})
return {}
def standup_collect(token, channel_id):
"""Collect and collate standup messages, returns collated message"""
if not is_standup_running(channel_id):
u_id = jwt_handler.decode_token(token)
starter = database.get_user_by_id(u_id)
standup_info = database.get_standup_channel_info(channel_id)
output_msg = f"STANDUP SUMMARY. Started By: {starter['handle']}. " +\
f"Length: {standup_info['length']}seconds\n\n" +\
f"MESSAGES:\n"
for message in standup_info["messages"]:
user = database.get_user_by_id(message["u_id"])
output_msg = output_msg + f"{user['handle']}: "
output_msg = output_msg + f"{message['message']}\n"
database.wipe_standup_messages(channel_id)
return output_msg
return None
def standup_start(token, channel_id, length):
"""Will return standup finish time if user and channel are both valid"""
# Check valid token
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
length = int(length)
# Check channel existence
channel = database.get_channel_by_id(channel_id)
if channel is None:
raise ValueError(INVALID_CHANNEL)
# Check user is member of channel
u_id = jwt_handler.decode_token(token)
if u_id not in channel["auth_ids"]:
raise AccessError(CHANNEL_CANT_VIEW_DETAIL)
# Check the startup is not currently active in this channel
old_time_end = database.get_standup_finish_time(channel_id)
if old_time_end is not None and\
json_time_translator.json_to_datetime(old_time_end) >= datetime.utcnow():
raise ValueError(STANDUP_RUNNING)
# Check for non-zero length
if length <= 0:
raise ValueError(STANDUP_TIME_INVALID)
# Set channel standup_end to now+X min and add finish time to database
time_end_datetime = datetime.utcnow() + timedelta(seconds=length)
time_end_json = json_time_translator.datetime_to_json(time_end_datetime)
# Move old standup messages
database.move_standup_to_unused_by_id(channel_id)
database.update_standup_by_id(channel_id, {
"time_finish": time_end_json,
"length": length
})
time_end_timestamp = int(
json_time_translator.datetime_to_timestamp(time_end_datetime))
# Start threaded timer
standup_timer_start(token, channel_id, length)
return {"time_finish": time_end_timestamp}
def message_unreact(token, message_id, react_id):
"""
Given a message within a channel the authorised user is part of, remove a
"react" to that particular message
"""
# Validate
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
# Decode token
u_id = jwt_handler.decode_token(token)
# Change react_id to an integer
if not isinstance(react_id, int):
react_id = int(react_id)
if not isinstance(message_id, int):
message_id = int(message_id)
# Validate data
message = database.get_message_by_id(message_id)
channel = database.get_channel_by_id(message["channel_id"])
if u_id not in channel["auth_ids"]:
raise AccessError(CHANNEL_CANT_VIEW_DETAIL)
if react_id != 1:
print(react_id)
raise ValueError(INVALID_REACT)
react_list = message["reacts"]
react_found = False
for react in react_list:
if react_id == react["react_id"] and u_id in react["u_id"]:
react_found = True
break
if not react_found:
raise ValueError(MESSAGE_NOT_REACTED)
# Remove react from message
for react in react_list:
if react_id == react["react_id"]:
react["u_id"].remove(u_id)
database.update_message_by_id(message_id, {"reacts": react_list})
return {}
def auth_logout(token):
"""Given an active token, invalidates the taken to log the user out. If a
valid token is given, and the user is successfully logged out, it returns
true, otherwise false."""
# Validate data
if not validator.is_valid_token(token):
return {"is_success": False}
# Converts token to u_id
u_id = jwt_handler.decode_token(token)
# Searches for the user by u_id
user = database.get_user_by_id(u_id)
# Searches for and removes the token from the user's active tokens
token_list = user["tokens"]
token_list.remove(token)
database.update_user_by_id(user["u_id"], {"tokens": token_list})
return {"is_success": True}
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."""
# Check valid token
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
x_start = int(x_start)
y_start = int(y_start)
x_end = int(x_end)
y_end = int(y_end)
if img_url[-3:].lower() != "jpg" and img_url[-4:].lower() != "jpeg":
raise ValueError(IMAGE_NOT_JPG)
# Save Image
file_name = json_time_translator.datetime_to_timestamp(datetime.utcnow())
local_url = f"server_files/static/{file_name}"
try:
urlretrieve(img_url, local_url + ".jpg")
except Exception:
raise ValueError(IMAGE_CANT_FETCH)
image_object = Image.open(local_url + ".jpg")
width, height = image_object.size
if not 0 <= x_start < width or not 0 < x_end <= width or not \
0 <= y_start < height or not 0 < y_end <= height:
raise ValueError(INVALID_COORDINATES)
if x_end <= x_start or y_end <= y_start:
raise ValueError(INVALID_CROP)
cropped = image_object.crop((x_start, y_start, x_end, y_end))
cropped.save(local_url + "_crop.jpg")
# Change current user's profile image
u_id = jwt_handler.decode_token(token)
database.update_user_by_id(u_id, {
"profile_img_url": f"http://127.0.0.1:5001/static/{file_name}_crop.jpg"
})
return {}
def channel_details(token, channel_id):
"""Given a Channel with ID channel_id that the authorised user is part of,
provide basic details about the channel"""
# Validate token and channel
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
if not validator.is_valid_channel(channel_id):
raise ValueError(INVALID_CHANNEL)
# Find user in database
u_id = jwt_handler.decode_token(token)
# Locate in database
channel = database.get_channel_by_id(channel_id)
user = database.get_user_by_id(u_id)
# Check user is authorised
if u_id not in channel["auth_ids"] and user["permission"] == MEMBER:
raise AccessError(CHANNEL_CANT_VIEW_DETAIL)
# Compile channel details
owner_list = channel["owner_ids"]
auth_list = channel["auth_ids"]
owner_list_with_details = []
auth_list_with_details = []
for owner_id in owner_list:
owner = database.get_user_by_id(owner_id)
owner_list_with_details.append({
"u_id": owner_id,
"name_first": owner["name_first"],
"name_last": owner["name_last"],
"profile_img_url": owner["profile_img_url"]})
for auth_id in auth_list:
auth = database.get_user_by_id(auth_id)
auth_list_with_details.append({
"u_id": auth_id,
"name_first": auth["name_first"],
"name_last": auth["name_last"],
"profile_img_url": auth["profile_img_url"]})
return {
"name": channel["name"],
"owner_members": owner_list_with_details,
"all_members": auth_list_with_details
}
def channel_addowner(token, channel_id, u_id):
"""Make user with user id u_id an owner of this channel"""
# Convert channel_id and u_id to integer
channel_id = int(channel_id)
u_id = int(u_id)
# Validate token, channel and user
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
if not validator.is_valid_channel(channel_id):
raise ValueError(INVALID_CHANNEL)
if not validator.is_valid_user(u_id):
raise ValueError(INVALID_USER)
# Locate channel and user in database
channel = database.get_channel_by_id(channel_id)
auth_user_id = jwt_handler.decode_token(token)
auth_user = database.get_user_by_id(auth_user_id)
# Check auth_user permissions
if auth_user["permission"] not in [OWNER, ADMIN] or\
auth_user_id not in channel["owner_ids"]:
raise AccessError(CHANNEL_ADD_OWNER_NO_AUTH)
# Add user to auth_ids
auth_list = channel["auth_ids"]
if u_id not in auth_list:
auth_list.append(u_id)
database.update_channel_by_id(channel_id, {
"auth_ids": auth_list
})
# Add user to owner_ids
owner_list = channel["owner_ids"]
if u_id in owner_list:
raise ValueError(CHANNEL_ALREADY_OWNER)
owner_list.append(u_id)
database.update_channel_by_id(channel_id, {
"owner_ids": owner_list
})
return {}
def channels_list(token):
"""Provide a list of all channels (and their associated details) that
the authorised user is part of"""
# Check validity of token
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
# Convert token to u_id
u_id = jwt_handler.decode_token(token)
# Get channels token is authorised in
result = []
for channel in database.get_all_channels():
if (u_id in channel["auth_ids"] or u_id in channel["owner_ids"]):
result.append({
"channel_id": channel["channel_id"],
"name": channel["name"]
})
return {"channels": result}
def user_profile_setname(token, name_first, name_last):
"""Update the authorised user's first and last name"""
# Check valid token
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
u_id = jwt_handler.decode_token(token)
# Check Valid input Name
if not validator.is_valid_name(name_first) or not validator.is_valid_name(name_last):
raise ValueError(INVALID_NAME)
# Update the database with new changes
database.update_user_by_id(u_id, {
"name_first": name_first,
"name_last": name_last
})
return {}
def standup_send(token, channel_id, message):
"""Adds message to standup buffer if standup is currently active"""
# Check valid token
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
# Check channel existence
channel = database.get_channel_by_id(channel_id)
if channel is None:
raise ValueError(INVALID_CHANNEL)
# Check user is member of channel
u_id = jwt_handler.decode_token(token)
if u_id not in channel["auth_ids"]:
raise AccessError(CHANNEL_CANT_VIEW_DETAIL)
# Check the startup is not currently active in this channel
old_time_end = database.get_standup_finish_time(channel_id)
if old_time_end is None or\
json_time_translator.json_to_datetime(old_time_end) < datetime.utcnow():
raise ValueError(STANDUP_NOT_RUNNING)
# Check valid message
if not validator.is_valid_message(message):
raise ValueError(INVALID_MESSAGE)
# Save message
database.add_standup_message(
channel_id, {
"u_id":
u_id,
"message":
message,
"time_created":
json_time_translator.datetime_to_json(datetime.utcnow()),
})
return {}
def user_profile_sethandle(token, handle_str):
"""Update the authorised user's handle (i.e. display name)"""
# Check valid token
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
u_id = jwt_handler.decode_token(token)
# Check valid handle
if not validator.is_valid_handle(handle_str):
raise ValueError(INVALID_HANDLE)
# Check if handle is already in use
if not validator.is_unique_handle(handle_str):
raise ValueError(NOT_UNIQUE_HANDLE)
# Update the database with new changes
database.update_user_by_id(u_id, {
"handle": handle_str
})
return {}
def user_profile_setemail(token, email):
"""Update the authorised user's email address"""
# Check valid token
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
u_id = jwt_handler.decode_token(token)
# Check valid email
if not validator.is_valid_email(email):
raise ValueError(INVALID_EMAIL)
# Check that email is not already in use
if not validator.is_unique_email(email):
raise ValueError(NOT_UNIQUE_EMAIL)
# Update the database with new changes
database.update_user_by_id(u_id, {
"email": email
})
return {}
def channels_create(token, name, is_public):
"""Creates a new channel with that name that is either a public or private channel"""
# Convert is_public to boolean
is_public = is_public.lower() in ("true", "yes", "t", "1")
# Validate token & data
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
if not validator.is_valid_channel_name(name):
raise ValueError(CHANNEL_LONG_NAME)
# Convert token to u_id
u_id = jwt_handler.decode_token(token)
# Create channel and get ID
channel_id = database.add_channel({
"name": name,
"messages": [],
"is_public": is_public,
"owner_ids": [u_id],
"auth_ids": [u_id]
})
return {"channel_id": channel_id}
def channel_messages(token, channel_id, start):
"""Given a Channel with ID channel_id that the authorised user is part of,
return up to 50 messages between index "start" and "start + 50". Message
with index 0 is the most recent message in the channel. This function
returns a new index "end" which is the value of "start + 50", or, if this
function has returned the least recent messages in the channel, returns -1
in "end" to indicate there are no more messages to load after this
return."""
# Convert 'start' to an integer
start = int(start)
# Validate token and channel ID
if not validator.is_valid_token(token):
raise AccessError(INVALID_TOKEN)
if not validator.is_valid_channel(channel_id):
raise ValueError(INVALID_CHANNEL)
# Locate channel
channel = database.get_channel_by_id(channel_id)
# Validate that token user is in channel
u_id = jwt_handler.decode_token(token)
if u_id not in channel["auth_ids"]:
raise AccessError(CHANNEL_CANT_VIEW_MSG)
# Validate messages exist
total_messages = len(channel['messages'])
if total_messages <= 0:
return {
"messages": [],
"start": start,
"end": -1
}
# Validate start point
if start > (total_messages - 1) or start < 0:
raise ValueError(CHANNEL_NO_MORE_MSG)
# Find index for the most recent message (reference list backwards)
start_index = len(channel['messages']) - 1 - start
# Get all recent messages up to 50
messages = []
end = start + 49
for msg_num in range(50):
index = start_index - msg_num
# If there are less than 50 msgs
if index < 0:
end = -1
break
# Get message object
message_id = channel['messages'][index]
message = database.get_message_by_id(message_id)
# If message is sent later or not there
if message is None or\
json_time_translator.json_to_datetime(message["time_created"]) >= datetime.utcnow():
continue
# Create output-able list of reacts
react_list = []
reacted_ids = []
all_reacts = database.get_all_reacts(message_id)
react_id = 1
for react in all_reacts:
is_this_user_reacted = False
if react["react_id"] == react_id:
reacted_ids.extend(react["u_id"])
if u_id in react["u_id"]:
is_this_user_reacted = True
# Only add the reaction if it has at least one count of a user
react_list.append({
"react_id": react_id,
"u_ids": reacted_ids,
"is_this_user_reacted": is_this_user_reacted
})
# print(message["time_created"])
# print(json_time_translator.json_to_datetime(message["time_created"]))
# print(json_time_translator.json_to_timestamp(message["time_created"]))
# Append to file
messages.append({
"message_id": message_id,
"u_id": message["u_id"],
"message": message["message"],
"time_created": json_time_translator.json_to_timestamp(message["time_created"]),
"reacts": react_list,
"is_pinned": message["is_pinned"]
})
return {
"messages": messages,
"start": start,
"end": end
}
