protocol.txt

JSON-BASED protocol

Client message structure:
{
    cmd_type:       COMMAND_TYPE,
    cmd:            COMMANDS,
    from:           string,
    to:             string,
    expire_period:  int,      (in seconds)
    data_type:      DATA_TYPE,
    data:           bytes | string
}

Server message structure:
{
    cmd_type:   COMMAND_TYPE,
    cmd:        COMMANDS,
    [status]:   STATUS, // if cmd_type is control
    from:       string,
    to:         string,
    data_type:  DATA_TYPE,
    data:       ....
}

COMMAND_TYPE:
    auth,

    control,

    message,
    file,

    history

COMMANDS:
    register,
    auth,

    list_contacts,
    search_contact,
    add_contact,
    remove_contact,

    create_group,
    add_to_group,
    remove_from_group,
    delete_group,
    list_groups,

    send_message,
    send_file,

    get_history

DATA_TYPE:
    0 - TEXT,
    1 - BINARY

STATUS:
    success,
    fail