Working on messaging API and database now.

src/packetserver/server/__init__.py

@@ -63,6 +63,9 @@ class Server:
             if 'users' not in conn.root():
                 logging.debug("users missing, creating bucket")
                 conn.root.users = PersistentMapping()
+            if 'messages' not in conn.root():
+                logging.debug("messages container missing, creating bucket")
+                conn.root.users = PersistentMapping()
             if 'SYSTEM' not in conn.root.users:
                 logging.debug("Creating system user for first time.")
                 User('SYSTEM', hidden=True, enabled=False).write_new(conn.root())

src/packetserver/server/constants.py

@@ -2,4 +2,5 @@
 default_server_config = {
     "motd": "Welcome to this PacketServer BBS!",
     "operator": "placeholder",
+    "max_message_length": 2000
 }

src/packetserver/server/messages.py

@@ -4,17 +4,259 @@ import persistent
 import persistent.list
 from persistent.mapping import PersistentMapping
 import datetime
-from typing import Self,Union,Optional
+from typing import Self,Union,Optional,Iterable,Sequence
-from packetserver.common import PacketServerConnection, Request, Response, Message, send_response, send_blank_response
+from packetserver.common import PacketServerConnection, Request, Response, send_response, send_blank_response
+from packetserver.common import Message as PacketMessage
 import ZODB
 import logging
 import uuid
 from uuid import UUID
 from packetserver.common.util import email_valid
+from packetserver.server.objects import Object
+from BTrees.OOBTree import TreeSet
+from packetserver.server.users import User, user_authorized
+from traceback import format_exc
+from collections import namedtuple
 
-# TODO all messages
+
+def mailbox_create(username: str, db_root: PersistentMapping):
+    un = username.upper().strip()
+    if un not in db_root['messages']:
+        db_root['messages'][un] = persistent.list.PersistentList()
+
+def global_unique_message_uuid(db_root: PersistentMapping) -> UUID:
+    if "message_uuids" not in db_root:
+        db_root['message_uuids'] = TreeSet()
+        logging.debug("Created message_uuid set for global message ids.")
+    uid = uuid.uuid4()
+    while uid in db_root['message_uuids']:
+        uid = uuid.uuid4()
+    return uid
 
 class Attachment:
     """Name and data that is sent with a message."""
-    def __init__(self, name: str, ):
+    def __init__(self, name: str, data: Union[bytes,bytearray,str]):
+        self._name = ""
+        self._data = b""
+        self._binary = True
+        self.data = data
+        self.name = name
+
+    @property
+    def name(self) -> str:
+        return self._name
+
+    @name.setter
+    def name(self, name: str):
+        if name.strip() != self._name:
+            if len(name.strip()) > 300:
+                raise ValueError("Object names must be no more than 300 characters.")
+            self._name = name.strip()
+
+    @property
+    def binary(self):
+        return self._binary
+
+    @property
+    def data(self) -> Union[str,bytes]:
+        if self.binary:
+            return self._data
+        else:
+            return self._data.decode()
+
+    @data.setter
+    def data(self, data: Union[bytes,bytearray,str]):
+        if type(data) in (bytes,bytearray):
+            if bytes(data) != self._data:
+                self._data = bytes(data)
+                self._binary = True
+        else:
+            if str(data).encode() != self._data:
+                self._data = str(data).encode()
+                self._binary = False
+
+    @property
+    def size(self) -> int:
+        return len(self.data)
+
+    def copy(self):
+        return Attachment(self.name, self.data)
+
+class ObjectAttachment(Attachment):
+    def __init__(self, name: str, obj: Object):
+        self.object = obj
+        super().__init__(name, "")
+
+    @property
+    def size(self) -> int:
+        return self.object.size
+
+    @property
+    def data(self) -> Union[str,bytes]:
+        return self.object.data
+
+    @property
+    def binary(self) -> bool:
+        return self.object.binary
+
+
+class MessageTextTooLongError(Exception):
+    """Raised when the message text exceeds the length allowed in the server config."""
     pass
+
+class MessageAlreadySentError(Exception):
+    """Raised when the message text exceeds the length allowed in the server config."""
+    pass
+
+class Message(persistent.Persistent):
+    def __init__(self, text: str, msg_to: Optional[Iterable[str],str]= None, msg_from: Optional[str] = None,
+                 attachments: Optional[Iterable[Attachment]] = None):
+        self.retrieved = False
+        self.sent_at = datetime.datetime.now(datetime.UTC)
+        self.text = text
+        self.attachments = ()
+        self.msg_to = (None,)
+        self.msg_from = None
+        self.msg_id = uuid.uuid4()
+        self.msg_delivered = False
+        if msg_to:
+            if type(msg_to) is str:
+                msg_to = msg_to.upper().strip()
+                self.msg_to = (msg_to,)
+            else:
+                msg_to_tmp = []
+                for i in msg_to:
+                    i = str(i).strip().upper()
+                    if i == "ALL":
+                        msg_to_tmp = ["ALL"]
+                        break
+                    else:
+                        msg_to_tmp.append(i)
+                self.msg_to = tuple(msg_to_tmp)
+        if msg_from:
+            self.msg_from = str(msg_from).upper().strip()
+
+        if attachments:
+            attch = []
+            for i in attachments:
+                if not isinstance(i,Attachment):
+                    attch.append(Attachment("",str(i)))
+                else:
+                    attch.append(i)
+            self.attachments = tuple(attch)
+    def __repr__(self):
+        return f"<Message: ID: {self.msg_id}, Sent: {self.msg_delivered}>"
+
+    def send(self, db: ZODB.DB) -> tuple:
+        if self.msg_delivered:
+            raise MessageAlreadySentError("Cannot send a private message that has already been sent.")
+        if self.msg_from is None:
+            raise ValueError("Message sender (message_from) cannot be None.")
+        new_attachments = []
+        for i in self.attachments:
+            if isinstance(i,ObjectAttachment):
+                new_attachments.append(Attachment(i.name, i.data))
+            else:
+                new_attachments.append(i)
+        send_counter = 0
+        recipients = []
+        failed = []
+        to_all = False
+        with db.transaction() as db:
+            for recipient in self.msg_to:
+                recipient = recipient.upper().strip()
+                if recipient is None:
+                    continue
+                if recipient == "ALL":
+                    recipients = [x for x in db.root.users if db.root.users[x].enabled]
+                    to_all = True
+                    break
+                recipients.append(recipient)
+            for recipient in recipients:
+                msg = Message(self.text, recipient, self.msg_from, attachments=[x.copy() for x in new_attachments])
+                try:
+                    mailbox_create(recipient, db.root())
+                    msg.msg_id = global_unique_message_uuid(db.root())
+                    msg.msg_delivered = True
+                    msg.sent_at = datetime.datetime.now(datetime.UTC)
+                    if to_all:
+                        msg.msg_to = 'ALL'
+                    db.root.messages[recipient].append(msg)
+                    send_counter = send_counter + 1
+                except:
+                    logging.error(f"Error sending message to {recipient}:\n{format_exc()}")
+                    failed.append(recipient)
+
+        return send_counter, failed
+
+DisplayOptions = namedtuple('DisplayOptions', ['get_text', 'limit', 'sort_by', 'reverse', 'search',
+                                               'get_attachments', 'sent_unsent'])
+
+def parse_display_options(req: Request) -> DisplayOptions:
+    limit = req.vars.get('limit')
+    try:
+        limit = int(limit)
+    except:
+        limit = None
+
+    d = req.vars.get('fetch')
+    if type(d) is str:
+        d.lower().strip()
+    if d in [1, 'y', True, 'yes', 'true', 't']:
+        get_data = True
+    else:
+        get_data = False
+
+    r = req.vars.get('reverse')
+    if type(r) is str:
+        r.lower().strip()
+    if r in [1, 'y', True, 'yes', 'true', 't']:
+        reverse = True
+    else:
+        reverse = False
+
+    sort = req.vars.get('sort')
+    sort_by = "name"
+    if type(sort) is str:
+        sort = sort.lower().strip()
+        if sort == "date":
+            sort_by = "date"
+        elif sort == "size":
+            sort_by = "size"
+
+    s = req.vars.get('search')
+    search = None
+    if type(s) is str:
+       s = s.lower()
+    if s:
+        search = str(s)
+
+    return DisplayOptions(get_data, limit, sort_by, reverse, search)
+
+
+def handle_message_get(req: Request, conn: PacketServerConnection, db: ZODB.DB):
+    pass
+
+def object_root_handler(req: Request, conn: PacketServerConnection, db: ZODB.DB):
+    logging.debug(f"{req} being processed by user_root_handler")
+    if not user_authorized(conn, db):
+        logging.debug(f"user {conn.remote_callsign} not authorized")
+        send_blank_response(conn, req, status_code=401)
+        return
+    logging.debug("user is authorized")
+    if req.method is Request.Method.GET:
+        handle_message_get(req, conn, db)
+    else:
+        send_blank_response(conn, req, status_code=404)
+
+
+
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