Check for version compatibility on login

docs/CHANGELOG.rst

@@ -13,6 +13,8 @@ Changed
 -------
 - **BACKWARD INCOMPATIBLE:** Remove ``inherit_collection`` parameter in
   ``Data.duplicate()`` and ``Sample.duplicate()``
+- Minimal supported version is checked when connection to the server and
+  warning is printed on mismatch
 
 
 ===================

src/resdk/resolwe.py

@@ -16,11 +16,13 @@
 import time
 import webbrowser
 from contextlib import suppress
+from importlib.metadata import version as package_version
 from typing import Optional, TypedDict
 from urllib.parse import urlencode, urljoin, urlparse
 
 import requests
 import slumber
+from packaging import version
 
 from resdk.uploader import Uploader
 
@@ -48,6 +50,7 @@
 DEFAULT_URL = "http://localhost:8000"
 AUTOMATIC_LOGIN_POSTFIX = "saml-auth/api-login/"
 INTERACTIVE_LOGIN_POSTFIX = "saml-auth/remote-login/"
+MINIMAL_SUPPORTED_VERSION_POSTFIX = "api/resdk_minimal_supported_version"
 
 
 class ResolweResource(slumber.Resource):
@@ -520,6 +523,9 @@ def __init__(
         self.automatic_login_url = urljoin(self.url, AUTOMATIC_LOGIN_POSTFIX)
         self.interactive_login_url = urljoin(self.url, INTERACTIVE_LOGIN_POSTFIX)
 
+        # Check minimal supported version.
+        self.version_check()
+
         if not interactive and (username is None or password is None):
             # Anonymous authentication
             return
@@ -531,6 +537,23 @@ def __init__(
             self.cookies = self.interactive_login()
             self.logger.info("Successfully logged in.")
 
+    def version_check(self):
+        """Check that the server is compatible with the client."""
+        url = urljoin(self.url, MINIMAL_SUPPORTED_VERSION_POSTFIX)
+        minimal_version = version.parse(
+            requests.get(url).json["minimal_supported_version"]
+        )
+        my_version = version.parse(package_version("resdk"))
+        if my_version < minimal_version:
+            message = (
+                f"Warning: your version of ReSDK ('{my_version}') is not compatible with "
+                f"the server: minimal required version is '{minimal_version}'. "
+                "To update the package run\n\n"
+                "pip install --upgrade resdk\n\n"
+                "from the command line."
+            )
+            print(message)
+
     def automatic_login(self, username: str, password: str) -> AuthCookie:
         """Attempt to perform automatic SAML login.