feat(docs): Add documentation on how to install tables

Also various documentation fixed and improvments

README.md

@@ -31,18 +31,35 @@ or if you want to also run the tests:
 
     pip3 install --user ".[ldap,tests]"
 
-You will also need a MySQL driver, recommended drivers are
+You will also need a MySQL driver, by default one of this is installed:
-- `mysqlclient`
+- `mysqlclient` (non Windows)
-- `PyMySQL`
+- `PyMySQL` (on Windows)
 
-`setup.py` will try to install a matching driver.
+#### Hint on MySQL driver on Windows:
+If you want to use `mysqlclient` instead of `PyMySQL` (performance?) you have to follow [this guide](https://www.radishlogic.com/coding/python-3/installing-mysqldb-for-python-3-in-windows/)
 
-#### Windows
+### Install database
-Same as above, but if you want to use `mysqlclient` instead of `PyMySQL` (performance?) you have to follow this guide:
+The user needs to have full permissions to the database.
+If not you need to create user and database manually do (or similar on Windows):
 
-https://www.radishlogic.com/coding/python-3/installing-mysqldb-for-python-3-in-windows/
+    (
+        echo "CREATE DATABASE flaschengeist;"
+        echo "CREATE USER 'flaschengeist'@'localhost' IDENTIFIED BY 'flaschengeist';"
+        echo "GRANT ALL PRIVILEGES ON flaschengeist.* TO 'flaschengeist'@'localhost';"
+        echo "FLUSH PRIVILEGES;"
+    ) | sudo mysql
 
-### Configuration
+Then you can install the database tables, this will update all tables from core + all enabled plugins.
+*Hint:* The same command can be later used to upgrade the database after plugins or core are updated.
+
+    $ flaschengeist db upgrade heads
+
+## Plugins
+To only upgrade one plugin (for example the `events` plugin):
+
+    $ flaschengeist db upgrade events@head
+
+## Configuration
 Configuration is done within the a `flaschengeist.toml`file, you can copy the one located inside the module path
 (where flaschegeist is installed) or create an empty one and place it inside either:
 1. `~/.config/`
@@ -63,21 +80,6 @@ So you have to configure one of the following options to call flaschengeists CRO
   - Pros: Guaranteed execution interval, no impact on user experience (at least if you do not limit wsgi worker threads)
   - Cons: Uses one of the webserver threads while executing
 
-### Database installation
-The user needs to have full permissions to the database.
-If not you need to create user and database manually do (or similar on Windows):
-
-    (
-        echo "CREATE DATABASE flaschengeist;"
-        echo "CREATE USER 'flaschengeist'@'localhost' IDENTIFIED BY 'flaschengeist';"
-        echo "GRANT ALL PRIVILEGES ON flaschengeist.* TO 'flaschengeist'@'localhost';"
-        echo "FLUSH PRIVILEGES;"
-    ) | sudo mysql
-
-Then you can install the database tables and initial entries:
-
-    $ flaschengeist install
-
 ### Run
 Flaschengeist provides a CLI, based on the flask CLI, respectivly called `flaschengeist`.
 

flaschengeist/database.py

@@ -22,6 +22,9 @@ migrate = Migrate()
 
 @migrate.configure
 def configure_alembic(config):
+    """Alembic configuration hook
+
+    """
     # Load migration paths from plugins
     migrations = [str(p.migrations_path) for p in current_app.config["FG_PLUGINS"].values() if p and p.migrations_path]
     if len(migrations) > 0:

flaschengeist/plugins/__init__.py

@@ -1,51 +1,109 @@
+"""Flaschengeist Plugins
+
+## Custom database tables
+
+You can add tables by declaring them using the SQLAlchemy syntax,
+then use Alembic to generate migrations for your tables.
+This allows Flaschengeist to proper up- or downgrade the
+database tables if an user updates your plugin.
+
+migrations have to be provided in a directory called `migrations`
+next to your plugin. E.G.
+
+    myplugin
+        - __init__.py
+        - other/
+            - ...
+        - migrations/
+
+## Useful Hooks
+There are some predefined hooks, which might get handy for you.
+
+For more information, please refer to
+- `flaschengeist.utils.hook.HookBefore` and
+- `flaschengeist.utils.hook.HookAfter`
+"""
+
 import pkg_resources
-from werkzeug.datastructures import FileStorage
 from werkzeug.exceptions import MethodNotAllowed, NotFound
 from flaschengeist.models.user import _Avatar, User
 from flaschengeist.utils.hook import HookBefore, HookAfter
 
+__all__ = [
+    "plugins_installed",
+    "plugins_loaded",
+    "before_delete_user",
+    "before_role_updated",
+    "before_update_user",
+    "after_role_updated",
+    "Plugin",
+    "AuthPlugin",
+]
+
+# Documentation hacks, see https://github.com/mitmproxy/pdoc/issues/320
 plugins_installed = HookAfter("plugins.installed")
-"""Hook decorator for when all plugins are installed
+plugins_installed.__doc__ = """Hook decorator for when all plugins are installed
-    Possible use case would be to populate the database with some presets.
 
-    Args:
+Possible use case would be to populate the database with some presets.
-        hook_result: void (kwargs)
 """
+
 plugins_loaded = HookAfter("plugins.loaded")
-"""Hook decorator for when all plugins are loaded
+plugins_loaded.__doc__ = """Hook decorator for when all plugins are loaded
-    Possible use case would be to check if a specific other plugin is loaded and change own behavior
 
-    Args:
+Possible use case would be to check if a specific other plugin is loaded and change own behavior
-        app: Current flask app instance (args)
+
-        hook_result: void (kwargs)
+Passed args:
+    - *app:* Current flask app instance (args)
 """
+
 before_role_updated = HookBefore("update_role")
-"""Hook decorator for when roles are modified
+before_role_updated.__doc__ = """Hook decorator for when roles are modified
-Args:
+    
-    role: Role object to modify
+Passed args:
-    new_name: New name if the name was changed (None if delete)
+    - *role:* `flaschengeist.models.user.Role` to modify
+    - *new_name:* New name if the name was changed (*None* if delete)
 """
+
 after_role_updated = HookAfter("update_role")
-"""Hook decorator for when roles are modified
+after_role_updated.__doc__ = """Hook decorator for when roles are modified
-Args:
+
-    role: Role object containing the modified role
+Passed args:
-    new_name: New name if the name was changed (None if deleted)
+    - *role:* modified `flaschengeist.models.user.Role`
+    - *new_name:* New name if the name was changed (*None* if deleted)
 """
+
 before_update_user = HookBefore("update_user")
-"""Hook decorator, when ever an user update is done, this is called before.
+before_update_user.__doc__ = """Hook decorator, when ever an user update is done, this is called before.
-Args:
+
-    user: User object
+Passed args:
+    - *user:* `flaschengeist.models.user.User` object
 """
+
 before_delete_user = HookBefore("delete_user")
-"""Hook decorator,this is called before an user gets deleted.
+before_delete_user.__doc__ = """Hook decorator,this is called before an user gets deleted.
-Args:
+
-    user: User object
+Passed args:
+    - *user:* `flaschengeist.models.user.User` object
 """
 
 
 class Plugin:
     """Base class for all Plugins
-    If your class uses custom models add a static property called ``models``"""
+
+    All plugins must be derived from this class.
+    There are some static properties a plugin must provide,
+    and some properties a plugin can provide if you might want
+    to use more functionality.
+
+    Required:
+        - *id*: Unique identifier of your plugin
+
+    Optional:
+        - *blueprint*: `flask.Blueprint` providing your routes
+        - *permissions*: List of your custom permissions
+        - *models*: Your models, used for API export
+        - *version*: Version of your plugin, can also be guessed by Flaschengeist
+    """
 
     blueprint = None  # You have to override
     """Override with a `flask.blueprint` if the plugin uses custom routes"""
@@ -55,14 +113,18 @@ class Plugin:
     A good style is to name the permissions with a prefix related to the plugin name,
     to prevent clashes with other plugins. E. g. instead of *delete* use *plugin_delete*.
     """
-    id = "dev.flaschengeist.plugin"  # You have to override
+
-    """Override with the unique ID of the plugin (Hint: FQN)"""
+    models = None
-    name = "plugin"  # You have to override
+    """Override with models module
-    """Override with human readable name of the plugin"""
+    
-    models = None  # You have to override
+    Used for API export, has to be a static property
-    """Override with models module"""
+    """
-    migrations_path = None  # Override this with the location of your db migrations directory
+
-    """Override with path to migration files, if custome db tables are used"""
+    version = None
+    """Override with a custom version, optional
+    
+    If not set, the version is guessed from the package / distribution
+    """
 
     def __init__(self, config=None):
         """Constructor called by create_app
@@ -206,14 +268,14 @@ class AuthPlugin(Plugin):
         """
         raise NotFound
 
-    def set_avatar(self, user: User, file: FileStorage):
+    def set_avatar(self, user, file):
         """Set the avatar for given user (if supported by auth backend)
 
         Default behavior is to use native Image objects stored on the Flaschengeist server
 
         Args:
             user: User to set the avatar for
-            file: FileStorage object uploaded by the user
+            file: `werkzeug.datastructures.FileStorage` uploaded by the user
         Raises:
             MethodNotAllowed: If not supported by Backend
             Any valid HTTP exception

flaschengeist/plugins/balance/routes.py

@@ -131,7 +131,7 @@ def get_balance(userid, current_session: Session):
 
     Route: ``/users/<userid>/balance`` | Method: ``GET``
 
-    GET-parameters: ```{from?: string, to?: string}```
+    GET-parameters: ``{from?: string, to?: string}``
 
     Args:
         userid: Userid of user to get balance from
@@ -170,7 +170,7 @@ def get_transactions(userid, current_session: Session):
 
     Route: ``/users/<userid>/balance/transactions`` | Method: ``GET``
 
-    GET-parameters: ```{from?: string, to?: string, limit?: int, offset?: int}```
+    GET-parameters: ``{from?: string, to?: string, limit?: int, offset?: int}``
 
     Args:
         userid: Userid of user to get transactions from

flaschengeist/utils/hook.py

@@ -7,6 +7,7 @@ _hooks_after = {}
 
 def Hook(function=None, id=None):
     """Hook decorator
+
     Use to decorate functions as hooks, so plugins can hook up their custom functions.
     """
     # `id` passed as `arg` not `kwarg`
@@ -38,8 +39,10 @@ def Hook(function=None, id=None):
 
 def HookBefore(id: str):
     """Decorator for functions to be called before a Hook-Function is called
+
     The hooked up function must accept the same arguments as the function hooked onto,
     as the functions are called with the same arguments.
+
     Hint: This enables you to modify the arguments!
     """
     if not id or not isinstance(id, str):
@@ -54,9 +57,18 @@ def HookBefore(id: str):
 
 def HookAfter(id: str):
     """Decorator for functions to be called after a Hook-Function is called
+
     As with the HookBefore, the hooked up function must accept the same
     arguments as the function hooked onto, but also receives a
     `hook_result` kwarg containing the result of the function.
+
+    Example:
+        ```py
+        @HookAfter("some.id")
+        def my_func(hook_result):
+            # This function is executed after the function registered with "some.id"
+            print(hook_result)  # This is the result of the function
+        ```
     """
 
     if not id or not isinstance(id, str):