Added unit tests, created functions to check the availability of updates.

webpicdownloader/util/UpdateModule.py

@@ -1,17 +0,0 @@
-
-
-from http.client import HTTPException
-import re
-from urllib import request as http
-
-
-def fetch_version(headers: str, url: str) -> str:
-    """
-
-    """
-    request = http.Request(url=url, headers=headers, method='GET')
-    response = http.urlopen(request)
-    if response.getcode() != 200:
-        raise HTTPException("Bad response returned by server")
-    return response.read().decode('utf-8')
-

webpicdownloader/util/UpdateUtils.py

@@ -0,0 +1,33 @@
+from re import fullmatch, Pattern
+from urllib import request as http
+from urllib.error import HTTPError
+
+
+def fetch_version(url: str) -> str:
+    """
+    Retrieve the latest webpicdownloader version available.
+
+    * :url: -> Url of the "VERSION" file on the repository.
+    * RETURN -> the latests 'VERSION' file content.
+    * THROWABLE -> can raise HTTP or URL error see urllib doc.
+    """
+    headers = {'User-Agent': "Mozilla/5.0 (Windows NT 11.0; Win64; x64) AppleWebKit/605.1.15 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/604.1"}
+    request = http.Request(url=url, headers=headers, method='GET')
+    response = http.urlopen(request)
+    if response.getcode() != 200:
+        raise HTTPError("Bad response returned by server")
+    return response.read().decode('utf-8')
+
+def is_new_version_available(version_current: str, version_url: str, version_pattern: Pattern) -> bool:
+    """
+    Verify if a new version is available.
+
+    * :current: -> Current version
+    * :version_url: -> Url of the VERSION file on the repository.
+    * :version_pattern: -> Patter to match version retrieved with the version_url.
+    * RETURN -> True means a new version is available, False else.
+    """
+    version = fetch_version(version_url)
+    if not fullmatch(version_pattern, version):
+        raise ValueError('The version retrieved from the remote server is not valid')
+    return version_current != version