split api, support custom templates

src/capport/api/app_cls.py

@@ -0,0 +1,46 @@
+from __future__ import annotations
+
+import os
+import os.path
+import typing
+
+import capport.comm.hub
+import capport.config
+import capport.utils.ipneigh
+import jinja2
+import quart.templating
+import quart_trio
+
+
+class DispatchingJinjaLoader(quart.templating.DispatchingJinjaLoader):
+    app: MyQuartApp
+
+    def __init__(self, app: MyQuartApp) -> None:
+        super().__init__(app)
+
+    def _loaders(self) -> typing.Generator[jinja2.BaseLoader, None, None]:
+        if self.app.custom_loader:
+            yield self.app.custom_loader
+        for loader in super()._loaders():
+            yield loader
+
+
+class MyQuartApp(quart_trio.QuartTrio):
+    my_nc: typing.Optional[capport.utils.ipneigh.NeighborController] = None
+    my_hub: typing.Optional[capport.comm.hub.Hub] = None
+    my_config: capport.config.Config
+    custom_loader: typing.Optional[jinja2.FileSystemLoader] = None
+
+    def __init__(self, import_name: str, **kwargs) -> None:
+        self.my_config = capport.config.Config.load_default_once()
+        kwargs.setdefault('template_folder', os.path.join(os.path.dirname(__file__), 'templates'))
+        cust_templ = os.path.join('custom', 'templates')
+        if os.path.exists(cust_templ):
+            self.custom_loader = jinja2.FileSystemLoader(os.fspath(cust_templ))
+        super().__init__(import_name, **kwargs)
+        self.debug = self.my_config.debug
+        self.secret_key = self.my_config.cookie_secret
+
+    def create_global_jinja_loader(self) -> DispatchingJinjaLoader:
+        """Create and return a global (not blueprint specific) Jinja loader."""
+        return DispatchingJinjaLoader(self)