Refactor e2xgrader apps

docs/source/getting_started/modes.rst

@@ -18,6 +18,12 @@ To deactivate all e2xgrader modes:
 
    e2xgrader deactivate --sys-prefix
 
+To show the current active mode:
+
+.. code-block:: sh
+
+   e2xgrader show_mode
+
 Teacher Mode
 ------------
 

e2xgrader/apps/__init__.py

@@ -0,0 +1,15 @@
+from .activatemodeapp import ActivateModeApp
+from .baseapp import E2xGrader
+from .deactivatemodeapp import DeactivateModeApp
+from .e2xgraderapp import E2xGraderApp
+from .showmodeapp import ShowModeApp
+from .togglemodeapp import ToggleModeApp
+
+__all__ = [
+    "E2xGrader",
+    "E2xGraderApp",
+    "ActivateModeApp",
+    "DeactivateModeApp",
+    "ShowModeApp",
+    "ToggleModeApp",
+]

e2xgrader/apps/activatemodeapp.py

@@ -0,0 +1,22 @@
+from ..utils.mode import E2xGraderMode
+from .togglemodeapp import ToggleModeApp
+
+
+class ActivateModeApp(ToggleModeApp):
+    description = "Activate a specific mode (teacher, student, student_exam)"
+
+    def start(self) -> None:
+        super().start()
+        if len(self.extra_args) != 1:
+            self.fail("Exactly one mode has to be specified")
+        if self.extra_args[0] not in [
+            E2xGraderMode.TEACHER.value,
+            E2xGraderMode.STUDENT.value,
+            E2xGraderMode.STUDENT_EXAM.value,
+        ]:
+            self.fail(
+                f"Mode {self.extra_args[0]} is not a valid mode that can be activated."
+            )
+        self.mode = self.extra_args[0]
+
+        self.activate_mode()

e2xgrader/apps/baseapp.py

@@ -0,0 +1,33 @@
+from textwrap import dedent
+
+from jupyter_core.application import JupyterApp
+from traitlets import Enum
+
+from ..utils.mode import E2xGraderMode, infer_e2xgrader_mode
+
+
+class E2xGrader(JupyterApp):
+
+    mode = Enum(
+        values=[mode.value for mode in E2xGraderMode],
+        default_value=E2xGraderMode.INACTIVE.value,
+        help=dedent(
+            """
+            Which mode is activated, can be teacher, student, student_exam or deactivated.
+            Is set to invalid if the mode cannot be inferred.
+        """
+        ),
+    )
+
+    def fail(self, msg, *args):
+        self.log.error(msg, *args)
+        self.exit(1)
+
+    def initialize(self, argv=None):
+        try:
+            mode = infer_e2xgrader_mode()
+            self.mode = mode
+        except ValueError as e:
+            self.log.error(str(e))
+            self.mode = E2xGraderMode.INVALID.value
+        super().initialize(argv)

e2xgrader/apps/deactivatemodeapp.py

@@ -0,0 +1,13 @@
+from ..utils.mode import E2xGraderMode
+from .togglemodeapp import ToggleModeApp
+
+
+class DeactivateModeApp(ToggleModeApp):
+    description = "Deactivate all e2xgrader extensions"
+
+    def start(self) -> None:
+        super().start()
+        if len(self.extra_args) != 0:
+            self.fail("e2xgrader deactivate does not take any arguments.")
+        self.mode = E2xGraderMode.INACTIVE.value
+        self.activate_mode()

e2xgrader/apps/e2xgraderapp.py

@@ -1,105 +1,48 @@
-import sys
-from argparse import ArgumentParser
 from textwrap import dedent
 
-from ..extensions import E2xExtensionManager
+from .activatemodeapp import ActivateModeApp
+from .baseapp import E2xGrader
+from .deactivatemodeapp import DeactivateModeApp
+from .showmodeapp import ShowModeApp
 
 
-class Manager:
-    def __init__(self):
-        self.extension_manager = E2xExtensionManager()
-        parser = ArgumentParser(
-            description="E2X extension manager.",
-            usage=dedent(
-                """
-                e2xgrader <command> [<args>]
-
-                Available sub commands are:
-                activate      activate a specific mode (teacher, student, student-exam)
-                deactivate    deactivate all extensions"""
-            ),
-        )
-
-        parser.add_argument("command", help="Subcommand to run")
+class E2xGraderApp(E2xGrader):
 
-        args = parser.parse_args(sys.argv[1:2])
-        if not hasattr(self, args.command):
-            print("Unrecognized command")
-            parser.print_help()
-            exit(1)
-        getattr(self, args.command)()
-
-    def activate(self):
-        parser = ArgumentParser(
-            description="Activate different modes",
-            usage=dedent(
+    subcommands = dict(
+        activate=(
+            ActivateModeApp,
+            dedent(
+                """\
+                Activate a specific mode (teacher, student, student_exam)
                 """
-                e2xgrader activate <mode> [--sys-prefix] [--user]
-
-                Available modes are:
-                teacher         activate the grader and all teaching extensions
-                student         activate the student extensions
-                student_exam    activate the student extensions in exam mode"""
-            ),
-        )
-        # prefixing the argument with -- means it's optional
-        parser.add_argument(
-            "mode",
-            help="Which mode to activate, can be teacher, student or student-exam",
-        )
-        parser.add_argument(
-            "--sys-prefix",
-            action="store_true",
-            help="If the extensions should be installed to sys.prefix",
-        )
-        parser.add_argument(
-            "--user",
-            action="store_true",
-            help="If the extensions should be installed to the user space",
-        )
-
-        args = parser.parse_args(sys.argv[2:])
-        if not hasattr(self.extension_manager, f"activate_{args.mode}"):
-            print("Unrecognized mode")
-            parser.print_help()
-            exit(1)
-        sys_prefix = False
-        user = False
-        if args.sys_prefix:
-            sys_prefix = True
-        if args.user:
-            user = True
-        getattr(self.extension_manager, f"activate_{args.mode}")(
-            sys_prefix=sys_prefix, user=user
-        )
-
-    def deactivate(self):
-        parser = ArgumentParser(
-            description="Deactivate extensions",
-            usage=dedent("python -m e2xgrader deactivate [--sys-prefix] [--user]"),
-        )
-        # prefixing the argument with -- means it's optional
-        parser.add_argument(
-            "--sys-prefix",
-            action="store_true",
-            help="If the extensions should be uninstalled from sys.prefix",
-        )
-        parser.add_argument(
-            "--user",
-            action="store_true",
-            help="If the extensions should be uninstalled from the user space",
-        )
-
-        args = parser.parse_args(sys.argv[2:])
+            ).strip(),
+        ),
+        deactivate=(
+            DeactivateModeApp,
+            dedent(
+                """\
+                Deactivate all e2xgrader extensions
+                """
+            ).strip(),
+        ),
+        show_mode=(
+            ShowModeApp,
+            dedent(
+                """\
+                Show the currently active mode
+                """
+            ).strip(),
+        ),
+    )
 
-        sys_prefix = False
-        user = False
-        if args.sys_prefix:
-            sys_prefix = True
-        if args.user:
-            user = True
-        self.extension_manager.deactivate(sys_prefix=sys_prefix, user=user)
+    def start(self) -> None:
+        super().start()
+        if self.subapp is None:
+            print(
+                "No subcommand given (run with --help for options). List of subcommands:\n"
+            )
+            self.print_subcommands()
 
 
 def main():
-    Manager()
+    E2xGraderApp.launch_instance()

e2xgrader/apps/showmodeapp.py

@@ -0,0 +1,9 @@
+from .baseapp import E2xGrader
+
+
+class ShowModeApp(E2xGrader):
+    description = "Show the currently active mode"
+
+    def start(self) -> None:
+        super().start()
+        print(f"Current mode: {self.mode}")

e2xgrader/apps/togglemodeapp.py

@@ -0,0 +1,62 @@
+from traitlets import Bool
+
+from ..extensions import E2xExtensionManager
+from ..utils.mode import E2xGraderMode, infer_e2xgrader_mode
+from .baseapp import E2xGrader
+
+
+class ToggleModeApp(E2xGrader):
+
+    sys_prefix = Bool(False, help="Install extensions to sys.prefix", config=True)
+
+    user = Bool(False, help="Install extensions to the user space", config=True)
+
+    flags = {
+        "sys-prefix": (
+            {"ToggleModeApp": {"sys_prefix": True}},
+            "Install extensions to sys.prefix",
+        ),
+        "user": (
+            {"ToggleModeApp": {"user": True}},
+            "Install extensions to the user space",
+        ),
+    }
+
+    def activate_mode(self):
+        """
+        Activates the specified mode by activating the corresponding extensions
+        using the E2xExtensionManager.
+
+        If the mode is "None", it deactivates all e2xgrader extensions.
+        """
+        extension_manager = E2xExtensionManager()
+        if self.mode == E2xGraderMode.INACTIVE.value:
+            print(
+                f"Deactivating e2xgrader extensions with sys_prefix={self.sys_prefix} "
+                f"and user={self.user}"
+            )
+            extension_manager.deactivate(sys_prefix=self.sys_prefix, user=self.user)
+        else:
+            print(
+                f"Activating mode {self.mode} with sys_prefix={self.sys_prefix} "
+                f"and user={self.user}"
+            )
+            getattr(extension_manager, f"activate_{self.mode}")(
+                sys_prefix=self.sys_prefix, user=self.user
+            )
+        self.log.info(f"Activated mode {self.mode}. ")
+        try:
+            mode = infer_e2xgrader_mode()
+            if mode != self.mode:
+                self.log.warning(
+                    f"The activated mode {self.mode} does not match the infered mode {mode}. \n"
+                    f"The mode {mode} may be activated on a higher level."
+                )
+        except ValueError as e:
+            self.log.error(str(e))
+            self.mode = E2xGraderMode.INVALID.value
+
+    def start(self) -> None:
+        super().start()
+        if self.sys_prefix and self.user:
+            self.fail("Cannot install in both sys-prefix and user space")

e2xgrader/extensions/utils.py

@@ -27,6 +27,14 @@ def get_nbextension_utils() -> Optional[ModuleType]:
     return None
 
 
+def get_notebook_config_manager() -> Optional[ModuleType]:
+    if is_installed("jupyter_server"):
+        return import_module("jupyter_server.config_manager").BaseJSONConfigManager
+    if is_installed("notebook") and get_notebook_major_version() < 7:
+        return import_module("notebook.services.config.manager").BaseJSONConfigManager
+    return None
+
+
 def discover_nbextensions(mode: str) -> List[Dict[str, str]]:
     extensions = list()
     for nbextension in _jupyter_nbextension_paths():

e2xgrader/server_extensions/base/extension.py

@@ -1,11 +1,10 @@
 from importlib import import_module
 
+from e2xcore.utils.utils import get_nbgrader_config
 from jinja2 import Environment, FileSystemLoader
 from traitlets import Any, List, TraitError, validate
 from traitlets.config import Application
 
-from e2xgrader.utils import get_nbgrader_config
-
 
 class BaseExtension(Application):
     apps = List(

e2xgrader/tests/apps/test_activatemodeapp.py

@@ -0,0 +1,35 @@
+import unittest
+from unittest.mock import patch
+
+from jupyter_core.application import NoStart
+
+from e2xgrader.apps.activatemodeapp import ActivateModeApp
+from e2xgrader.utils.mode import E2xGraderMode
+
+
+class TestActivateModeApp(unittest.TestCase):
+
+    def setUp(self):
+        self.app = ActivateModeApp()
+        self.app.initialize([])
+
+    def test_fail_without_args(self):
+        with self.assertRaises(SystemExit):
+            self.app.initialize([])
+            self.app.start()
+
+    def test_fail_with_invalid_mode(self):
+        with self.assertRaises(SystemExit):
+            self.app.initialize(["invalid_mode"])
+            self.app.start()
+
+    @patch("e2xgrader.apps.togglemodeapp.ToggleModeApp.activate_mode")
+    def test_activate_mode(self, mock_activate_mode):
+        try:
+            self.app.initialize([E2xGraderMode.TEACHER.value])
+            self.app.start()
+        except NoStart:
+            pass
+        finally:
+            self.assertEqual(self.app.mode, E2xGraderMode.TEACHER.value)
+            mock_activate_mode.assert_called_once()