Made some major changes to the project to facilitate a lighter code base and the
must flexible module interface possible.
-the mutli-process architecture now operate at the command object level so each
command now operate in it's own process instead of a single process handling
multiple command objects.
-each module is now an independent application that will now tell the session
object all of the commands it can run via named pipe. during command execution,
it will run the requested command object also running io with the session object
via named pipe.
with this change, it is now possible for modules to be developed in different
versions or QT or entirely different languages. the only requirement is the need
to support named pipes. shared memory segments is also a nice to have but not
needed.
-clients can now run multiple instances of the same command via changes to the
protocol. mrci frames will now include a branch id along with the command id.
the branch id can be used by clients to differentiate the io between instances
of the same command.
-the command states are longer controlled by a single object. it will now be up
to the command object (internal/exterenal) to send an IDLE frame to the client
to notify it that the command has finished. the session object will still track
if the command is in idle state or not but not directly control it.
-must async commands now use binary formatted data instead of TEXT as a way to
reduce overhead.
-all command objects can now send async commands. it is no longer limited to just
internal commands, however; the data of these async commands are verified by
session in some way to prevent host crashing due to malformed data.
-changed up the database structure to rely more on user ids, channel ids and
removed all foreign keys pointing to user names, channel names and sub-channel
names. also removed the groups table altogether. instead, the host rank is now
directly attached to the user data in the users table.
-changed the query object to now support the INNER JOIN SQL clause. this change
was needed to support the new database structure.
-version negotiation is now one-way via tcp connection or module interface.
the host will make it's own verion numner known to the client connected via
tcp or the module connected via named pipe. it will now be entirely up to the
client or module to decide if they support the host. another change in this
regard is the removal of the import rev for the modules. compatibility for
modules shall now use just the host verion.
-removed ls_cmds and cmd_info. the NEW_CMD frame now carries all information
about the command (cmd_id, cmd_name, summery, io and full_description) so it
is now possible for the clients to display the command documentation instead
of the host.
Documentation for the internal commands were updated to reflect the changes but
all other documentation will need to be updated in the near future.
