[core] Cleanup + Fix loading migrations of (dis)abled plugins

Signed-off-by: Ferdinand Thiessen <rpm@fthiessen.de>

flaschengeist/alembic/__init__.py

@@ -1,4 +1,5 @@
 from pathlib import Path
 
 
-alembic_migrations = str(Path(__file__).resolve().parent / "migrations")
+alembic_migrations_path = str(Path(__file__).resolve().parent / "migrations")
+alembic_script_path = str(Path(__file__).resolve().parent)

flaschengeist/app.py

@@ -5,14 +5,12 @@ from flask_cors import CORS
 from datetime import datetime, date
 from flask.json import JSONEncoder, jsonify
 from importlib.metadata import entry_points
-from sqlalchemy.exc import OperationalError
 from werkzeug.exceptions import HTTPException
 
 from flaschengeist import logger
-from flaschengeist.models import Plugin
+from flaschengeist.controller import pluginController
 from flaschengeist.utils.hook import Hook
-from flaschengeist.plugins import AuthPlugin
-from flaschengeist.config import config, configure_app
+from flaschengeist.config import configure_app
 
 
 class CustomJSONEncoder(JSONEncoder):
@@ -39,40 +37,29 @@ class CustomJSONEncoder(JSONEncoder):
 @Hook("plugins.loaded")
 def load_plugins(app: Flask):
     app.config["FG_PLUGINS"] = {}
+    all_plugins = entry_points(group="flaschengeist.plugins")
 
-    for entry_point in entry_points(group="flaschengeist.plugins"):
-        logger.debug(f"Found plugin: {entry_point.name} ({entry_point.dist.version})")
-
-        if entry_point.name == config["FLASCHENGEIST"]["auth"] or (
-            entry_point.name in config and config[entry_point.name].get("enabled", False)
-        ):
-            logger.debug(f"Load plugin {entry_point.name}")
-            try:
-                plugin = entry_point.load()(entry_point, config=config.get(entry_point.name, {}))
-                if hasattr(plugin, "blueprint") and plugin.blueprint is not None:
-                    app.register_blueprint(plugin.blueprint)
-            except:
-                logger.error(
-                    f"Plugin {entry_point.name} was enabled, but could not be loaded due to an error.",
-                    exc_info=True,
-                )
-                continue
-            if isinstance(plugin, AuthPlugin):
-                if entry_point.name != config["FLASCHENGEIST"]["auth"]:
-                    logger.debug(f"Unload not configured AuthPlugin {entry_point.name}")
-                    del plugin
-                    continue
-                else:
-                    logger.info(f"Using authentication plugin: {entry_point.name}")
-                    app.config["FG_AUTH_BACKEND"] = plugin
-            else:
-                logger.info(f"Using plugin: {entry_point.name}")
-            app.config["FG_PLUGINS"][entry_point.name] = plugin
-        else:
-            logger.debug(f"Skip disabled plugin {entry_point.name}")
-    if "FG_AUTH_BACKEND" not in app.config:
-        logger.fatal("No authentication plugin configured or authentication plugin not found")
-        raise RuntimeError("No authentication plugin configured or authentication plugin not found")
+    for plugin in pluginController.get_enabled_plugins():
+        logger.debug(f"Searching for enabled plugin {plugin.name}")
+        entry_point = all_plugins.select(name=plugin.name)
+        if not entry_point:
+            logger.error(
+                f"Plugin {plugin.name} was enabled, but could not be found.",
+                exc_info=True,
+            )
+            continue
+        try:
+            loaded = entry_point[0].load()(entry_point[0])
+            if hasattr(plugin, "blueprint") and plugin.blueprint is not None:
+                app.register_blueprint(plugin.blueprint)
+        except:
+            logger.error(
+                f"Plugin {plugin.name} was enabled, but could not be loaded due to an error.",
+                exc_info=True,
+            )
+            continue
+        logger.info(f"Loaded plugin: {plugin.name}")
+        app.config["FG_PLUGINS"][plugin.name] = loaded
 
 
 def create_app(test_config=None, cli=False):

flaschengeist/cli/install_cmd.py

@@ -3,7 +3,7 @@ from click.decorators import pass_context
 from flask.cli import with_appcontext
 from flask_migrate import upgrade
 
-from flaschengeist.alembic import alembic_migrations
+from flaschengeist.alembic import alembic_migrations_path
 from flaschengeist.cli.plugin_cmd import install_plugin_command
 from flaschengeist.utils.hook import Hook
 
@@ -14,7 +14,7 @@ from flaschengeist.utils.hook import Hook
 @Hook("plugins.installed")
 def install(ctx):
     # Install database
-    upgrade(alembic_migrations, revision="heads")
+    upgrade(alembic_migrations_path, revision="heads")
 
     # Install plugins
     install_plugin_command(ctx, [], True)

flaschengeist/config.py

@@ -77,17 +77,6 @@ def configure_app(app, test_config=None):
 
     configure_logger()
 
-    # Always enable this builtin plugins!
-    update_dict(
-        config,
-        {
-            "auth": {"enabled": True},
-            "roles": {"enabled": True},
-            "users": {"enabled": True},
-            "scheduler": {"enabled": True},
-        },
-    )
-
     if "secret_key" not in config["FLASCHENGEIST"]:
         logger.critical("No secret key was configured, please configure one for production systems!")
         raise RuntimeError("No secret key was configured")

flaschengeist/controller/messageController.py

@@ -1,5 +1,5 @@
-from flaschengeist.utils.hook import Hook
-from flaschengeist.models import User, Role
+from ..utils.hook import Hook
+from ..models import User, Role
 
 
 class Message:

flaschengeist/controller/pluginController.py

@@ -8,14 +8,35 @@ import sqlalchemy
 from typing import Union
 from flask import current_app
 from werkzeug.exceptions import NotFound
+from sqlalchemy.exc import OperationalError
 from importlib.metadata import entry_points
 
 from .. import logger
 from ..database import db
-from ..utils import Hook
+from ..utils.hook import Hook
 from ..models import Plugin, PluginSetting, Notification
 
 
+def get_enabled_plugins():
+    try:
+        enabled_plugins = Plugin.query.filter(Plugin.enabled == True).all()
+    except OperationalError as e:
+
+        class PluginStub:
+            def __init__(self, name) -> None:
+                self.name = name
+
+        logger.error("Could not connect to database or database not initialized! No plugins enabled!")
+        logger.debug("Can not query enabled plugins", exc_info=True)
+        enabled_plugins = [
+            PluginStub("auth"),
+            PluginStub("roles"),
+            PluginStub("users"),
+            PluginStub("scheduler"),
+        ]
+    return enabled_plugins
+
+
 def get_setting(plugin_id: str, name: str, **kwargs):
     """Get plugin setting from database
 
@@ -29,9 +50,7 @@ def get_setting(plugin_id: str, name: str, **kwargs):
         `KeyError` if no such setting exists in the database
     """
     try:
-        setting = (
-            PluginSetting.query.filter(PluginSetting.plugin == plugin_id).filter(PluginSetting.name == name).one()
-        )
+        setting = PluginSetting.query.filter(PluginSetting.plugin == plugin_id).filter(PluginSetting.name == name).one()
         return setting.value
     except sqlalchemy.orm.exc.NoResultFound:
         if "default" in kwargs:
@@ -49,9 +68,7 @@ def set_setting(plugin_id: str, name: str, value):
         value: Value to be stored
     """
     setting = (
-        PluginSetting.query.filter(PluginSetting.plugin == plugin_id)
-        .filter(PluginSetting.name == name)
-        .one_or_none()
+        PluginSetting.query.filter(PluginSetting.plugin == plugin_id).filter(PluginSetting.name == name).one_or_none()
     )
     if setting is not None:
         if value is None:
@@ -81,3 +98,64 @@ def notify(plugin_id: str, user, text: str, data=None):
         db.session.add(n)
         db.session.commit()
         return n.id
+
+
+@Hook("plugins.installed")
+def install_plugin(plugin_name: str):
+    logger.debug(f"Installing plugin {plugin_name}")
+    entry_point = entry_points(group="flaschengeist.plugins", name=plugin_name)
+    if not entry_point:
+        raise NotFound
+
+    plugin = entry_point[0].load()(entry_point[0])
+    entity = Plugin(name=plugin.name, version=plugin.version)
+    db.session.add(entity)
+    db.session.commit()
+    return entity
+
+
+@Hook("plugin.uninstalled")
+def uninstall_plugin(plugin_id: Union[str, int]):
+    plugin = disable_plugin(plugin_id)
+    logger.debug(f"Uninstall plugin {plugin.name}")
+
+    entity = current_app.config["FG_PLUGINS"][plugin.name]
+    entity.uninstall()
+    del current_app.config["FG_PLUGINS"][plugin.name]
+    db.session.delete(plugin)
+    db.session.commit()
+
+
+@Hook("plugins.enabled")
+def enable_plugin(plugin_id: Union[str, int]):
+    logger.debug(f"Enabling plugin {plugin_id}")
+    plugin: Plugin = Plugin.query
+    if isinstance(plugin_id, str):
+        plugin = plugin.filter(Plugin.name == plugin_id).one_or_none()
+        if plugin is None:
+            logger.debug("Plugin not installed, trying to install")
+            plugin = install_plugin(plugin_id)
+    else:
+        plugin = plugin.get(plugin_id)
+        if plugin is None:
+            raise NotFound
+    plugin.enabled = True
+    db.session.commit()
+
+    return plugin
+
+
+@Hook("plugins.disabled")
+def disable_plugin(plugin_id: Union[str, int]):
+    logger.debug(f"Disabling plugin {plugin_id}")
+    plugin: Plugin = Plugin.query
+    if isinstance(plugin_id, str):
+        plugin = plugin.filter(Plugin.name == plugin_id).one_or_none()
+    else:
+        plugin = plugin.get(plugin_id)
+    if plugin is None:
+        raise NotFound
+    plugin.enabled = False
+    db.session.commit()
+
+    return plugin

flaschengeist/database/__init__.py

@@ -4,7 +4,9 @@ from flask_sqlalchemy import SQLAlchemy
 from importlib.metadata import EntryPoint, entry_points, distribution
 from sqlalchemy import MetaData
 
+from flaschengeist.alembic import alembic_script_path
 from flaschengeist import logger
+from flaschengeist.controller import pluginController
 
 # https://alembic.sqlalchemy.org/en/latest/naming.html
 metadata = MetaData(
@@ -31,25 +33,26 @@ def configure_alembic(config: Config):
     uninstall can break the alembic version management.
     """
     # Set main script location
-    config.set_main_option(
-        "script_location", str(distribution("flaschengeist").locate_file("") / "flaschengeist" / "alembic")
-    )
+    config.set_main_option("script_location", alembic_script_path)
 
     # Set Flaschengeist's migrations
     migrations = [config.get_main_option("script_location") + "/migrations"]
 
     # Gather all migration paths
-    ep: EntryPoint
-    for ep in entry_points(group="flaschengeist.plugins"):
+    all_plugins = entry_points(group="flaschengeist.plugins")
+    for plugin in pluginController.get_enabled_plugins():
+        entry_point = all_plugins.select(name=plugin.name)
+        if not entry_point:
+            continue
         try:
-            directory = ep.dist.locate_file("")
-            for loc in ep.module.split(".") + ["migrations"]:
+            directory = entry_point.dist.locate_file("")
+            for loc in entry_point.module.split(".") + ["migrations"]:
                 directory /= loc
             if directory.exists():
                 logger.debug(f"Adding migration version path {directory}")
                 migrations.append(str(directory.resolve()))
         except:
-            logger.warning(f"Could not load migrations of plugin {ep.name} for database migration.")
+            logger.warning(f"Could not load migrations of plugin {plugin.name} for database migration.")
             logger.debug("Plugin loading failed", exc_info=True)
 
     # write back seperator (we changed it if neither seperator nor locations were specified)

flaschengeist/models/__init__.py

@@ -2,4 +2,4 @@ from .session import *
 from .user import *
 from .plugin import *
 from .notification import *
-from .image import *
+from .image import *

flaschengeist/models/notification.py

@@ -8,10 +8,17 @@ from ..database.types import Serial, UtcDateTime, ModelSerializeMixin
 class Notification(db.Model, ModelSerializeMixin):
     __tablename__ = "notification"
     id: int = db.Column("id", Serial, primary_key=True)
-    plugin: str = db.Column(db.String(127), nullable=False)
     text: str = db.Column(db.Text)
     data: Any = db.Column(db.PickleType(protocol=4))
     time: datetime = db.Column(UtcDateTime, nullable=False, default=UtcDateTime.current_utc)
 
-    user_id_: int = db.Column("user_id", Serial, db.ForeignKey("user.id"), nullable=False)
-    user_: User = db.relationship("User")
+    user_id_: int = db.Column("user", Serial, db.ForeignKey("user.id"), nullable=False)
+    plugin_id_: int = db.Column("plugin", Serial, db.ForeignKey("plugin.id"), nullable=False)
+    user_: "User" = db.relationship("User")
+    plugin_: "Plugin" = db.relationship(
+        "Plugin", backref=db.backref("notifications_", cascade="all, delete, delete-orphan")
+    )
+
+    @property
+    def plugin(self):
+        return self.plugin_.name

flaschengeist/models/user.py

@@ -17,11 +17,13 @@ role_permission_association_table = db.Table(
     db.Column("permission_id", Serial, db.ForeignKey("permission.id")),
 )
 
+
 class Permission(db.Model, ModelSerializeMixin):
     __tablename__ = "permission"
     name: str = db.Column(db.String(30), unique=True)
 
     _id = db.Column("id", Serial, primary_key=True)
+    _plugin_id: int = db.Column("plugin", Serial, db.ForeignKey("plugin.id"))
 
 
 class Role(db.Model, ModelSerializeMixin):

flaschengeist/plugins/__init__.py

@@ -115,10 +115,10 @@ class BasePlugin:
     ```
     """
 
-    def __init__(self, entry_point: EntryPoint, config=None):
+    def __init__(self, entry_point: EntryPoint):
         """Constructor called by create_app
         Args:
-            config: Dict configuration containing the plugin section
+            entry_point: EntryPoint from which this plugin was loaded
         """
         self.version = entry_point.dist.version
         self.name = entry_point.name
@@ -127,6 +127,8 @@ class BasePlugin:
     def install(self):
         """Installation routine
 
+        Also called when updating the plugin, compare `version` and `installed_version`.
+
         Is always called with Flask application context,
         it is called after the plugin permissions are installed.
         """
@@ -143,6 +145,14 @@ class BasePlugin:
         """
         pass
 
+    @property
+    def installed_version(self):
+        """Installed version of the plugin"""
+        from ..controller import pluginController
+
+        self.__installed_version = pluginController.get_installed_version(self.name)
+        return self.__installed_version
+
     def get_setting(self, name: str, **kwargs):
         """Get plugin setting from database
 

flaschengeist/plugins/scheduler.py

@@ -2,6 +2,7 @@ from flask import Blueprint
 from datetime import datetime, timedelta
 
 from flaschengeist import logger
+from flaschengeist.config import config
 from flaschengeist.plugins import BasePlugin
 from flaschengeist.utils.HTTP import no_content
 
@@ -38,8 +39,8 @@ def scheduled(id: str, replace=False, **kwargs):
 
 
 class SchedulerPlugin(BasePlugin):
-    def __init__(self, entry_point, config=None):
-        super().__init__(entry_point, config)
+    def __init__(self, entry_point):
+        super().__init__(entry_point)
         self.blueprint = Blueprint(self.name, __name__)
 
         def __view_func():
@@ -52,9 +53,9 @@ class SchedulerPlugin(BasePlugin):
             except:
                 logger.error("Error while executing scheduled tasks!", exc_info=True)
 
-        cron = None if config is None else config.get("cron", "passive_web").lower()
+        cron = config.get("scheduler", {}).get("cron", "passive_web").lower()
 
-        if cron is None or cron == "passive_web":
+        if cron == "passive_web":
             self.blueprint.teardown_app_request(__passiv_func)
         elif cron == "active_web":
             self.blueprint.add_url_rule("/cron", view_func=__view_func)

flaschengeist/plugins/users/__init__.py

@@ -10,7 +10,7 @@ from . import permissions
 from flaschengeist import logger
 from flaschengeist.config import config
 from flaschengeist.plugins import BasePlugin
-from flaschengeist.models.user import User
+from flaschengeist.models import User
 from flaschengeist.utils.decorators import login_required, extract_session, headers
 from flaschengeist.controller import userController
 from flaschengeist.utils.HTTP import created, no_content