view libervia/backend/core/constants.py @ 4202:b26339343076

core: use a user specific directory for PID file: default location of pid file is now specific to logged user, this allow to run several instances of Libervia by different users on the same machine without PID conflicts.
author Goffi <goffi@goffi.org>
date Sun, 14 Jan 2024 17:48:02 +0100
parents 50c919dfe61b
children 5a0bddfa34ac
line wrap: on
line source

#!/usr/bin/env python3

# Libervia: an XMPP client
# Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

try:
    from xdg import BaseDirectory
    from os.path import expanduser, realpath
except ImportError:
    BaseDirectory = None
from os.path import dirname, join
import tempfile
from typing import Final

from libervia import backend

try:
    from getpass import getuser
except ImportError:
    logged_user = "unkonwn"
else:
    logged_user = getuser()


class Const(object):

    ## Application ##
    APP_NAME = "Libervia"
    APP_COMPONENT = "backend"
    APP_NAME_ALT = "Libervia"
    APP_NAME_FILE = "libervia"
    APP_NAME_FULL = f"{APP_NAME} ({APP_COMPONENT})"
    APP_VERSION = (
        backend.__version__
    )
    APP_RELEASE_NAME = "La Ruche"
    APP_URL = "https://libervia.org"

    ## Runtime ##
    PLUGIN_EXT = "py"
    HISTORY_SKIP = "skip"

    ## Main config ##
    DEFAULT_BRIDGE = "dbus"

    ## Protocol ##
    XMPP_C2S_PORT = 5222
    XMPP_MAX_RETRIES = None
    # default port used on Prosody, may differ on other servers
    XMPP_COMPONENT_PORT = 5347

    ## Parameters ##
    NO_SECURITY_LIMIT = -1  #  FIXME: to rename
    SECURITY_LIMIT_MAX = 0
    INDIVIDUAL = "individual"
    GENERAL = "general"
    # General parameters
    HISTORY_LIMIT = "History"
    SHOW_OFFLINE_CONTACTS = "Offline contacts"
    SHOW_EMPTY_GROUPS = "Empty groups"
    # Parameters related to connection
    FORCE_SERVER_PARAM = "Force server"
    FORCE_PORT_PARAM = "Force port"
    # Parameters related to encryption
    PROFILE_PASS_PATH = ("General", "Password")
    MEMORY_CRYPTO_NAMESPACE = "crypto"  # for the private persistent binary dict
    MEMORY_CRYPTO_KEY = "personal_key"
    # Parameters for static blog pages
    # FIXME: blog constants should not be in core constants
    STATIC_BLOG_KEY = "Blog page"
    STATIC_BLOG_PARAM_TITLE = "Title"
    STATIC_BLOG_PARAM_BANNER = "Banner"
    STATIC_BLOG_PARAM_KEYWORDS = "Keywords"
    STATIC_BLOG_PARAM_DESCRIPTION = "Description"

    ## Menus ##
    MENU_GLOBAL = "GLOBAL"
    MENU_ROOM = "ROOM"
    MENU_SINGLE = "SINGLE"
    MENU_JID_CONTEXT = "JID_CONTEXT"
    MENU_ROSTER_JID_CONTEXT = "ROSTER_JID_CONTEXT"
    MENU_ROSTER_GROUP_CONTEXT = "MENU_ROSTER_GROUP_CONTEXT"
    MENU_ROOM_OCCUPANT_CONTEXT = "MENU_ROOM_OCCUPANT_CONTEXT"

    ## Profile and entities ##
    PROF_KEY_NONE = "@NONE@"
    PROF_KEY_DEFAULT = "@DEFAULT@"
    PROF_KEY_ALL = "@ALL@"
    #: anybody
    ENTITY_ALL = "@ALL@"
    #: Bare jids of administrators
    ENTITY_ADMINS = "@ADMIN@"
    #: bare jid of client's profile
    ENTITY_PROFILE_BARE = "@PROFILE_BAREJID@"
    ENTITY_ALL_RESOURCES = "@ALL_RESOURCES@"
    ENTITY_MAIN_RESOURCE = "@MAIN_RESOURCE@"
    ENTITY_CAP_HASH = "CAP_HASH"
    ENTITY_TYPE = "type"
    ENTITY_TYPE_MUC = "MUC"

    ## Roster jids selection ##
    PUBLIC = "PUBLIC"
    ALL = (
        "ALL"
    )  # ALL means all known contacts, while PUBLIC means everybody, known or not
    GROUP = "GROUP"
    JID = "JID"

    ## Messages ##
    MESS_TYPE_INFO = "info"
    MESS_TYPE_CHAT = "chat"
    MESS_TYPE_ERROR = "error"
    MESS_TYPE_GROUPCHAT = "groupchat"
    MESS_TYPE_HEADLINE = "headline"
    MESS_TYPE_NORMAL = "normal"
    MESS_TYPE_AUTO = "auto"  # magic value to let the backend guess the type
    MESS_TYPE_STANDARD = (
        MESS_TYPE_CHAT,
        MESS_TYPE_ERROR,
        MESS_TYPE_GROUPCHAT,
        MESS_TYPE_HEADLINE,
        MESS_TYPE_NORMAL,
    )
    MESS_TYPE_ALL = MESS_TYPE_STANDARD + (MESS_TYPE_INFO, MESS_TYPE_AUTO)

    # Update

    MESS_UPDATE_EDIT = "EDIT"
    MESS_UPDATE_REACTION = "REACTION"
    MESS_UPDATE_RETRACT = "RETRACT"

    MESS_EXTRA_INFO = "info_type"
    EXTRA_INFO_DECR_ERR = "DECRYPTION_ERROR"
    EXTRA_INFO_ENCR_ERR = "ENCRYPTION_ERROR"
    MESS_EXTRA_EDITIONS = "editions"

    # encryption is a key for plugins
    MESS_KEY_ENCRYPTION: Final = "ENCRYPTION"
    # encrypted is a key for frontends
    MESS_KEY_ENCRYPTED = "encrypted"
    MESS_KEY_TRUSTED = "trusted"

    # File encryption algorithms
    ENC_AES_GCM = "AES-GCM"

    ## Chat ##
    CHAT_ONE2ONE = "one2one"
    CHAT_GROUP = "group"

    ## Presence ##
    PRESENCE_UNAVAILABLE = "unavailable"
    PRESENCE_SHOW_AWAY = "away"
    PRESENCE_SHOW_CHAT = "chat"
    PRESENCE_SHOW_DND = "dnd"
    PRESENCE_SHOW_XA = "xa"
    PRESENCE_SHOW = "show"
    PRESENCE_STATUSES = "statuses"
    PRESENCE_STATUSES_DEFAULT = "default"
    PRESENCE_PRIORITY = "priority"

    ## Common namespaces ##
    NS_XML = "http://www.w3.org/XML/1998/namespace"
    NS_CLIENT = "jabber:client"
    NS_COMPONENT = "jabber:component:accept"
    NS_STREAM = (NS_CLIENT, NS_COMPONENT)
    NS_FORWARD = "urn:xmpp:forward:0"
    NS_DELAY = "urn:xmpp:delay"
    NS_XHTML = "http://www.w3.org/1999/xhtml"

    ## Common XPath ##

    IQ_GET = '/iq[@type="get"]'
    IQ_SET = '/iq[@type="set"]'

    ## Directories ##

    # directory for components specific data
    COMPONENTS_DIR = "components"
    CACHE_DIR = "cache"
    # files in file dir are stored for long term
    # files dir is global, i.e. for all profiles
    FILES_DIR = "files"
    # FILES_LINKS_DIR is a directory where files owned by a specific profile
    # are linked to the global files directory. This way the directory can be
    #  shared per profiles while keeping global directory where identical files
    # shared between different profiles are not duplicated.
    FILES_LINKS_DIR = "files_links"
    # FILES_TMP_DIR is where profile's partially transfered files are put.
    # Once transfer is completed, they are moved to FILES_DIR
    FILES_TMP_DIR = "files_tmp"

    ## Templates ##
    TEMPLATE_TPL_DIR = "templates"
    TEMPLATE_THEME_DEFAULT = "default"
    TEMPLATE_STATIC_DIR = "static"
    # templates i18n
    KEY_LANG = "lang"
    KEY_THEME = "theme"

    ## Plugins ##

    # PLUGIN_INFO keys
    # XXX: we use PI instead of PLUG_INFO which would normally be used
    #      to make the header more readable
    PI_NAME = "name"
    PI_IMPORT_NAME = "import_name"
    PI_MAIN = "main"
    PI_HANDLER = "handler"
    PI_TYPE = (
        "type"
    )  #  FIXME: should be types, and should handle single unicode type or tuple of types (e.g. "blog" and "import")
    PI_MODES = "modes"
    PI_PROTOCOLS = "protocols"
    PI_DEPENDENCIES = "dependencies"
    PI_RECOMMENDATIONS = "recommendations"
    PI_DESCRIPTION = "description"
    PI_USAGE = "usage"

    # Types
    PLUG_TYPE_XEP = "XEP"
    PLUG_TYPE_MISC = "MISC"
    PLUG_TYPE_EXP = "EXP"
    PLUG_TYPE_SEC = "SEC"
    PLUG_TYPE_SYNTAXE = "SYNTAXE"
    PLUG_TYPE_PUBSUB = "PUBSUB"
    PLUG_TYPE_BLOG = "BLOG"
    PLUG_TYPE_IMPORT = "IMPORT"
    PLUG_TYPE_ENTRY_POINT = "ENTRY_POINT"

    # Modes
    PLUG_MODE_CLIENT = "client"
    PLUG_MODE_COMPONENT = "component"
    PLUG_MODE_DEFAULT = (PLUG_MODE_CLIENT,)
    PLUG_MODE_BOTH = (PLUG_MODE_CLIENT, PLUG_MODE_COMPONENT)

    # names of widely used plugins
    TEXT_CMDS = "TEXT-COMMANDS"

    # PubSub event categories
    PS_PEP = "PEP"
    PS_MICROBLOG = "MICROBLOG"

    # PubSub
    PS_PUBLISH = "publish"
    PS_RETRACT = "retract"  # used for items
    PS_DELETE = "delete"  # used for nodes
    PS_PURGE = "purge"  # used for nodes
    PS_ITEM = "item"
    PS_ITEMS = "items"  # Can contain publish and retract items
    PS_EVENTS = (PS_ITEMS, PS_DELETE, PS_PURGE)

    ## MESSAGE/NOTIFICATION LEVELS ##

    LVL_INFO = "info"
    LVL_WARNING = "warning"
    LVL_ERROR = "error"

    ## XMLUI ##
    XMLUI_WINDOW = "window"
    XMLUI_POPUP = "popup"
    XMLUI_FORM = "form"
    XMLUI_PARAM = "param"
    XMLUI_DIALOG = "dialog"
    XMLUI_DIALOG_CONFIRM = "confirm"
    XMLUI_DIALOG_MESSAGE = "message"
    XMLUI_DIALOG_NOTE = "note"
    XMLUI_DIALOG_FILE = "file"
    XMLUI_DATA_ANSWER = "answer"
    XMLUI_DATA_CANCELLED = "cancelled"
    XMLUI_DATA_TYPE = "type"
    XMLUI_DATA_MESS = "message"
    XMLUI_DATA_LVL = "level"
    XMLUI_DATA_LVL_INFO = LVL_INFO
    XMLUI_DATA_LVL_WARNING = LVL_WARNING
    XMLUI_DATA_LVL_ERROR = LVL_ERROR
    XMLUI_DATA_LVL_DEFAULT = XMLUI_DATA_LVL_INFO
    XMLUI_DATA_LVLS = (XMLUI_DATA_LVL_INFO, XMLUI_DATA_LVL_WARNING, XMLUI_DATA_LVL_ERROR)
    XMLUI_DATA_BTNS_SET = "buttons_set"
    XMLUI_DATA_BTNS_SET_OKCANCEL = "ok/cancel"
    XMLUI_DATA_BTNS_SET_YESNO = "yes/no"
    XMLUI_DATA_BTNS_SET_DEFAULT = XMLUI_DATA_BTNS_SET_OKCANCEL
    XMLUI_DATA_FILETYPE = "filetype"
    XMLUI_DATA_FILETYPE_FILE = "file"
    XMLUI_DATA_FILETYPE_DIR = "dir"
    XMLUI_DATA_FILETYPE_DEFAULT = XMLUI_DATA_FILETYPE_FILE

    ## Logging ##
    LOG_LVL_DEBUG = "DEBUG"
    LOG_LVL_INFO = "INFO"
    LOG_LVL_WARNING = "WARNING"
    LOG_LVL_ERROR = "ERROR"
    LOG_LVL_CRITICAL = "CRITICAL"
    LOG_LEVELS = (
        LOG_LVL_DEBUG,
        LOG_LVL_INFO,
        LOG_LVL_WARNING,
        LOG_LVL_ERROR,
        LOG_LVL_CRITICAL,
    )
    LOG_BACKEND_STANDARD = "standard"
    LOG_BACKEND_TWISTED = "twisted"
    LOG_BACKEND_BASIC = "basic"
    LOG_BACKEND_CUSTOM = "custom"
    LOG_BASE_LOGGER = "root"
    LOG_TWISTED_LOGGER = "twisted"
    LOG_OPT_SECTION = "DEFAULT"  # section of sat.conf where log options should be
    LOG_OPT_PREFIX = "log_"
    # (option_name, default_value) tuples
    LOG_OPT_COLORS = (
        "colors",
        "true",
    )  # true for auto colors, force to have colors even if stdout is not a tty, false for no color
    LOG_OPT_TAINTS_DICT = (
        "levels_taints_dict",
        {
            LOG_LVL_DEBUG: ("cyan",),
            LOG_LVL_INFO: (),
            LOG_LVL_WARNING: ("yellow",),
            LOG_LVL_ERROR: ("red", "blink", r"/!\ ", "blink_off"),
            LOG_LVL_CRITICAL: ("bold", "red", "Guru Meditation ", "normal_weight"),
        },
    )
    LOG_OPT_LEVEL = ("level", "info")
    LOG_OPT_FORMAT = ("fmt", "%(message)s")  # similar to logging format.
    LOG_OPT_LOGGER = ("logger", "")  # regex to filter logger name
    LOG_OPT_OUTPUT_SEP = "//"
    LOG_OPT_OUTPUT_DEFAULT = "default"
    LOG_OPT_OUTPUT_MEMORY = "memory"
    LOG_OPT_OUTPUT_MEMORY_LIMIT = 300
    LOG_OPT_OUTPUT_FILE = "file"  # file is implicit if only output
    LOG_OPT_OUTPUT = (
        "output",
        LOG_OPT_OUTPUT_SEP + LOG_OPT_OUTPUT_DEFAULT,
    )  # //default = normal output (stderr or a file with twistd), path/to/file for a file (must be the first if used), //memory for memory (options can be put in parenthesis, e.g.: //memory(500) for a 500 lines memory)

    ## action constants ##
    META_TYPE_FILE = "file"
    META_TYPE_CALL = "call"
    META_TYPE_OVERWRITE = "overwrite"
    META_TYPE_NOT_IN_ROSTER_LEAK = "not_in_roster_leak"
    META_SUBTYPE_CALL_AUDIO = "audio"
    META_SUBTYPE_CALL_VIDEO = "video"

    ## HARD-CODED ACTIONS IDS (generated with uuid.uuid4) ##
    AUTHENTICATE_PROFILE_ID = "b03bbfa8-a4ae-4734-a248-06ce6c7cf562"
    CHANGE_XMPP_PASSWD_ID = "878b9387-de2b-413b-950f-e424a147bcd0"

    ## Text values ##
    BOOL_TRUE = "true"
    BOOL_FALSE = "false"

    ## Special values used in bridge methods calls ##
    HISTORY_LIMIT_DEFAULT = -1
    HISTORY_LIMIT_NONE = -2

    ## Progress error special values ##
    PROGRESS_ERROR_DECLINED = "declined"  #  session has been declined by peer user
    PROGRESS_ERROR_FAILED = "failed"  #  something went wrong with the session

    ## Files ##
    FILE_TYPE_DIRECTORY = "directory"
    FILE_TYPE_FILE = "file"
    # when filename can't be found automatically, this one will be used
    FILE_DEFAULT_NAME = "unnamed"

    ## Permissions management ##
    ACCESS_PERM_READ = "read"
    ACCESS_PERM_WRITE = "write"
    ACCESS_PERMS = {ACCESS_PERM_READ, ACCESS_PERM_WRITE}
    ACCESS_TYPE_PUBLIC = "public"
    ACCESS_TYPE_WHITELIST = "whitelist"
    ACCESS_TYPES = (ACCESS_TYPE_PUBLIC, ACCESS_TYPE_WHITELIST)

    ## Common data keys ##
    KEY_THUMBNAILS = "thumbnails"
    KEY_PROGRESS_ID = "progress_id"
    KEY_ATTACHMENTS = "attachments"
    KEY_ATTACHMENTS_MEDIA_TYPE = "media_type"
    KEY_ATTACHMENTS_PREVIEW = "preview"
    KEY_ATTACHMENTS_RESIZE = "resize"


    ## Common extra keys/values ##
    KEY_ORDER_BY = "order_by"
    KEY_USE_CACHE = "use_cache"
    KEY_DECRYPT = "decrypt"

    ORDER_BY_CREATION = 'creation'
    ORDER_BY_MODIFICATION = 'modification'

    # internationalisation
    DEFAULT_LOCALE = "en_GB"

    ## Command Line ##

    # Exit codes used by CLI applications
    EXIT_OK = 0
    EXIT_ERROR = 1  # generic error, when nothing else match
    EXIT_BAD_ARG = 2  # arguments given by user are bad
    EXIT_BRIDGE_ERROR = 3  # can't connect to bridge
    EXIT_BRIDGE_ERRBACK = 4  # something went wrong when calling a bridge method
    EXIT_BACKEND_NOT_FOUND = 5  # can't find backend with this bride
    EXIT_NOT_FOUND = 16  # an item required by a command was not found
    EXIT_DATA_ERROR = 17  # data needed for a command is invalid
    EXIT_MISSING_FEATURE = 18  # a needed plugin or feature is not available
    EXIT_CONFLICT = 19  # an item already exists
    EXIT_USER_CANCELLED = 20  # user cancelled action
    EXIT_INTERNAL_ERROR = 111  # unexpected error
    EXIT_FILE_NOT_EXE = (
        126
    )  # a file to be executed was found, but it was not an executable utility (cf. man 1 exit)
    EXIT_CMD_NOT_FOUND = 127  # a utility to be executed was not found (cf. man 1 exit)
    EXIT_CMD_ERROR = 127  # a utility to be executed returned an error exit code
    EXIT_SIGNAL_INT = 128  # a command was interrupted by a signal (cf. man 1 exit)

    ## Misc ##
    SAVEFILE_DATABASE = APP_NAME_FILE + ".db"
    IQ_SET = '/iq[@type="set"]'
    ENV_PREFIX = "SAT_"  # Prefix used for environment variables
    IGNORE = "ignore"
    NO_LIMIT = -1  # used in bridge when a integer value is expected
    DEFAULT_MAX_AGE = 1209600  # default max age of cached files, in seconds
    STANZA_NAMES = ("iq", "message", "presence")

    # Stream Hooks
    STREAM_HOOK_SEND = "send"
    STREAM_HOOK_RECEIVE = "receive"

    @classmethod
    def LOG_OPTIONS(cls):
        """Return options checked for logs"""
        # XXX: we use a classmethod so we can use Const inheritance to change default options
        return (
            cls.LOG_OPT_COLORS,
            cls.LOG_OPT_TAINTS_DICT,
            cls.LOG_OPT_LEVEL,
            cls.LOG_OPT_FORMAT,
            cls.LOG_OPT_LOGGER,
            cls.LOG_OPT_OUTPUT,
        )

    @classmethod
    def bool(cls, value: str) -> bool:
        """@return (bool): bool value for associated constant"""
        assert isinstance(value, str)
        return value.lower() in (cls.BOOL_TRUE, "1", "yes", "on", "y", "t")

    @classmethod
    def bool_const(cls, value: bool) -> str:
        """@return (str): constant associated to bool value"""
        assert isinstance(value, bool)
        return cls.BOOL_TRUE if value else cls.BOOL_FALSE


## Configuration ##
if (
    BaseDirectory
):  # skipped when xdg module is not available (should not happen in backend)
    if "org.libervia.cagou" in BaseDirectory.__file__:
        # FIXME: hack to make config read from the right location on Android
        # TODO: fix it in a more proper way

        # we need to use Android API to get downloads directory
        import os.path
        from jnius import autoclass

        # we don't want the very verbose jnius log when we are in DEBUG level
        import logging
        logging.getLogger('jnius').setLevel(logging.WARNING)
        logging.getLogger('jnius.reflect').setLevel(logging.WARNING)

        Environment = autoclass("android.os.Environment")

        BaseDirectory = None
        Const.DEFAULT_CONFIG = {
            "local_dir": "/data/data/org.libervia.cagou/app",
            "media_dir": "/data/data/org.libervia.cagou/files/app/media",
            # FIXME: temporary location for downloads, need to call API properly
            "downloads_dir": os.path.join(
                Environment.getExternalStoragePublicDirectory(
                    Environment.DIRECTORY_DOWNLOADS
                ).getAbsolutePath(),
                Const.APP_NAME_FILE,
            ),
            "pid_dir": join(tempfile.gettempdir(), Const.APP_NAME_FILE, logged_user),
            "log_dir": "%(local_dir)s",
        }
        Const.CONFIG_FILES = [
            "/data/data/org.libervia.cagou/files/app/android/"
            + Const.APP_NAME_FILE
            + ".conf"
        ]
    else:
        import os
        # we use parent of "sat" module dir as last config path, this is useful for
        # per instance configurations (e.g. a dev instance and a main instance)
        root_dir = dirname(dirname(backend.__file__)) + '/'
        Const.CONFIG_PATHS = (
            # /etc/_sat.conf is used for system-related settings (e.g. when media_dir
            # is set by the distribution and has not reason to change, or in a Docker
            # image)
            ["/etc/_", "/etc/", "~/", "~/."]
            + [
                "{}/".format(path)
                for path in list(BaseDirectory.load_config_paths(Const.APP_NAME_FILE))
            ]
            # this is to handle legacy sat.conf
            + [
                "{}/".format(path)
                for path in list(BaseDirectory.load_config_paths("sat"))
            ]
            + [root_dir]
        )

        # on recent versions of Flatpak, FLATPAK_ID is set at run time
        # it seems that this is not the case on older versions,
        # but FLATPAK_SANDBOX_DIR seems set then
        if os.getenv('FLATPAK_ID') or os.getenv('FLATPAK_SANDBOX_DIR'):
            # for Flatpak, the conf can't be set in /etc or $HOME, so we have
            # to add /app
            Const.CONFIG_PATHS.append('/app/')

        ## Configuration ##
        Const.DEFAULT_CONFIG = {
            "media_dir": "/usr/share/" + Const.APP_NAME_FILE + "/media",
            "local_dir": BaseDirectory.save_data_path(Const.APP_NAME_FILE),
            "downloads_dir": "~/Downloads/" + Const.APP_NAME_FILE,
            "pid_dir": join(tempfile.gettempdir(), Const.APP_NAME_FILE, logged_user),
            "log_dir": "%(local_dir)s",
        }

        # List of the configuration filenames sorted by ascending priority
        Const.CONFIG_FILES = [
            realpath(expanduser(path) + Const.APP_NAME_FILE + ".conf")
            for path in Const.CONFIG_PATHS
        ] + [
            # legacy sat.conf
            realpath(expanduser(path) + "sat.conf")
            for path in Const.CONFIG_PATHS
        ]