integrations: Add ClickUp integration script.

Add a python script to help integrate Zulip
with Clickup.

Urlopen is used instead of the usual requests
library inorder to make the script standalone.

Fixes zulip#26529

zulip/integrations/clickup/README.md

@@ -0,0 +1,19 @@
+# A script that automates setting up a webhook with ClickUp
+
+Usage :
+
+1. Make sure you have all of the relevant ClickUp credentials before
+   executing the script:
+    - The ClickUp Team ID
+    - The ClickUp Client ID
+    - The ClickUp Client Secret
+
+2. Execute the script :
+
+    $ python zulip_clickup.py --clickup-team-id <clickup_team_id> \
+                             --clickup-client-id <clickup_client_id> \
+                             --clickup-client-secret <clickup_client_secret> \
+                             --zulip-webhook-url "GENERATED_WEBHOOK_URL"
+
+For more information, please see Zulip's documentation on how to set up
+a ClickUp integration [here](https://zulip.com/integrations/doc/clickup).

zulip/integrations/clickup/test_zulip_clickup.py

@@ -0,0 +1,175 @@
+import io
+import re
+from functools import wraps
+from typing import Any, Callable, Dict, List, Optional, Union
+from unittest import TestCase
+from unittest.mock import DEFAULT, patch
+
+from integrations.clickup import zulip_clickup
+from integrations.clickup.zulip_clickup import ClickUpAPIHandler
+
+MOCK_WEBHOOK_URL = (
+    "https://YourZulipApp.com/api/v1/external/clickup?api_key=TJ9DnIiNqt51bpfyPll5n2uT4iYxMBW9"
+)
+
+MOCK_AUTH_CODE = "332KKA3321NNAK3MADS"
+MOCK_AUTH_CODE_URL = f"https://YourZulipApp.com/?code={MOCK_AUTH_CODE}"
+MOCK_API_KEY = "X" * 32
+
+SCRIPT_PATH = "integrations.clickup.zulip_clickup"
+
+MOCK_CREATED_WEBHOOK_ID = "13-13-13-13-1313-13"
+MOCK_DELETE_WEBHOOK_ID = "12-12-12-12-12"
+MOCK_GET_WEBHOOK_IDS = {"endpoint": MOCK_WEBHOOK_URL, "id": MOCK_DELETE_WEBHOOK_ID}
+
+CLICKUP_TEAM_ID = "teamid123"
+CLICKUP_CLIENT_ID = "clientid321"
+CLICKUP_CLIENT_SECRET = "clientsecret322"  # noqa: S105
+
+
+def make_clickup_request_side_effect(
+    path: str, query: Dict[str, Union[str, List[str]]], method: str
+) -> Optional[Dict[str, Any]]:
+    clickup_api = ClickUpAPIHandler(CLICKUP_CLIENT_ID, CLICKUP_CLIENT_SECRET, CLICKUP_TEAM_ID)
+    api_data_mapper: Dict[str, Dict[str, Dict[str, Any]]] = {  # path -> method -> response
+        clickup_api.ENDPOINTS["oauth"]: {
+            "POST": {"access_token": MOCK_API_KEY},
+        },
+        clickup_api.ENDPOINTS["team"]: {
+            "POST": {"id": MOCK_CREATED_WEBHOOK_ID},
+            "GET": {"webhooks": [MOCK_GET_WEBHOOK_IDS]},
+        },
+        clickup_api.ENDPOINTS["webhook"].format(webhook_id=MOCK_DELETE_WEBHOOK_ID): {"DELETE": {}},
+    }
+    return api_data_mapper.get(path, {}).get(method, DEFAULT)
+
+
+def mock_script_args() -> Callable[[Any], Callable[..., Any]]:
+    def decorator(func: Callable[..., Any]) -> Callable[..., Any]:
+        @wraps(func)
+        def wrapper(*args: Any, **kwargs: Any) -> Any:
+            mock_user_inputs = [
+                MOCK_WEBHOOK_URL,  # input for 1st step
+                MOCK_AUTH_CODE_URL,  # input for 3rd step
+                "1,2,3,4,5",  # third input for 4th step
+            ]
+            with patch(
+                "sys.argv",
+                [
+                    "zulip_clickup.py",
+                    "--clickup-team-id",
+                    CLICKUP_TEAM_ID,
+                    "--clickup-client-id",
+                    CLICKUP_CLIENT_ID,
+                    "--clickup-client-secret",
+                    CLICKUP_CLIENT_SECRET,
+                    "--zulip-webhook-url",
+                    MOCK_WEBHOOK_URL,
+                ],
+            ), patch("os.system"), patch("time.sleep"), patch("sys.exit"), patch(
+                "builtins.input", side_effect=mock_user_inputs
+            ), patch(
+                SCRIPT_PATH + ".ClickUpAPIHandler.make_clickup_request",
+                side_effect=make_clickup_request_side_effect,
+            ):
+                result = func(*args, **kwargs)
+
+            return result
+
+        return wrapper
+
+    return decorator
+
+
+class ZulipClickUpScriptTest(TestCase):
+    @mock_script_args()
+    def test_valid_arguments(self) -> None:
+        with patch(SCRIPT_PATH + ".run") as mock_run, patch(
+            "sys.stdout", new=io.StringIO()
+        ) as mock_stdout:
+            zulip_clickup.main()
+            self.assertRegex(mock_stdout.getvalue(), r"Running Zulip Clickup Integration...")
+            mock_run.assert_called_once_with(
+                CLICKUP_CLIENT_ID, CLICKUP_CLIENT_SECRET, CLICKUP_TEAM_ID, MOCK_WEBHOOK_URL
+            )
+
+    def test_missing_arguments(self) -> None:
+        with self.assertRaises(SystemExit) as cm:
+            with patch("sys.stderr", new=io.StringIO()) as mock_stderr:
+                zulip_clickup.main()
+        self.assertEqual(cm.exception.code, 2)
+        self.assertRegex(
+            mock_stderr.getvalue(),
+            r"""the following arguments are required: --clickup-team-id, --clickup-client-id, --clickup-client-secret, --zulip-webhook-url\n""",
+        )
+
+    @mock_script_args()
+    def test_redirect_to_auth_page(self) -> None:
+        with patch("webbrowser.open") as mock_open, patch(
+            "sys.stdout", new=io.StringIO()
+        ) as mock_stdout:
+            zulip_clickup.main()
+            redirect_uri = "https://YourZulipApp.com"
+            mock_open.assert_called_once_with(
+                f"https://app.clickup.com/api?client_id={CLICKUP_CLIENT_ID}&redirect_uri={redirect_uri}"
+            )
+            expected_output = (
+                r"STEP 1[\s\S]*"
+                r"ClickUp authorization page will open in your browser\.[\s\S]*"
+                r"Please authorize your workspace\(s\)\.[\s\S]*"
+                r"Click 'Connect Workspace' on the page to proceed\.\.\."
+            )
+
+            self.assertRegex(
+                mock_stdout.getvalue(),
+                expected_output,
+            )
+
+    @mock_script_args()
+    def test_query_for_auth_code(self) -> None:
+        with patch("webbrowser.open"), patch("sys.stdout", new=io.StringIO()) as mock_stdout:
+            zulip_clickup.main()
+            expected_output = (
+                "STEP 2\n----\nAfter you've authorized your workspace,\n"
+                "you should be redirected to your home URL.\n"
+                "Please copy your home URL and paste it below.\n"
+                "It should contain a code, and look similar to this:\n\n"
+                "e.g. " + re.escape(MOCK_AUTH_CODE_URL)
+            )
+            self.assertRegex(
+                mock_stdout.getvalue(),
+                expected_output,
+            )
+
+    @mock_script_args()
+    def test_select_clickup_events(self) -> None:
+        with patch("webbrowser.open"), patch("sys.stdout", new=io.StringIO()) as mock_stdout:
+            zulip_clickup.main()
+            expected_output = r"""
+STEP 3
+----
+Please select which ClickUp event notification\(s\) you'd
+like to receive in your Zulip app\.
+EVENT CODES:
+    1 = task
+    2 = list
+    3 = folder
+    4 = space
+    5 = goals
+
+    Or, enter \* to subscribe to all events\.
+
+Here's an example input if you intend to only receive notifications
+related to task, list and folder: 1,2,3
+"""
+            self.assertRegex(
+                mock_stdout.getvalue(),
+                expected_output,
+            )
+
+    @mock_script_args()
+    def test_success_message(self) -> None:
+        with patch("webbrowser.open"), patch("sys.stdout", new=io.StringIO()) as mock_stdout:
+            zulip_clickup.main()
+            expected_output = r"SUCCESS: Completed integrating your Zulip app with ClickUp!\s*webhook_id: \d+-\d+-\d+-\d+-\d+-\d+\s*You may delete this script or run it again to reconfigure\s*your integration\."
+            self.assertRegex(mock_stdout.getvalue(), expected_output)