base app with app-key, registration, login, logout

src/justgetit/configuration.py

@@ -0,0 +1,79 @@
+import shelve
+import datetime
+
+DBFILE = "config.shelve"
+
+class Configuration():
+    """
+    This class holds persistent configuration:
+     - appkey: the app key, alowing traffic with the backend
+     - last_key_validation_date: last date the appkey was validated, should be no more than a week ago otherwise the app will not run
+     - username: the user name
+     - userpwd: the users pwd
+     - userlang: the users language
+     - lastlogin_date: date of last sucessful login
+    """
+    loaded = False
+    data = {}
+
+    def __init__(self, app):
+        self.app = app
+        self.load()
+
+    def load(self):
+        path = self.app.paths.config / DBFILE
+        if path.exists():
+            shelve_file = shelve.open(path)
+            self.data = shelve_file['data']
+            shelve_file.close()
+        print("shelve opened")
+        print(self.data)
+
+    def save(self):
+        shelve_file = shelve.open(self.app.paths.config / DBFILE)
+        shelve_file['data'] = self.data
+        shelve_file.close()
+        print("shelve stored")
+
+
+    def has_valid_app_key(self):
+        if 'appkey' in self.data:
+            print("found app key {self.data['appkey']}")
+            today = datetime.date.today()
+            last_month = today - datetime.timedelta(days=30)
+            if self.data['last_key_validation_date'] > last_month:
+                self.data['last_key_validation_date'] = today
+                return True
+        return False
+
+    def store_app_key(self, new_key):
+        self.data['appkey'] = new_key
+        self.data['last_key_validation_date'] = datetime.date.today()
+        self.save()
+
+    def user_is_logged_in(self):
+        if 'username' in self.data:
+            print("found user {self.data['username']}")
+            today = datetime.date.today()
+            last_week = today - datetime.timedelta(days=7)
+            if self.data['lastlogin_date'] > last_week:
+                self.update_last_activity_date()
+                return True
+        return False
+    
+    def store_login(self, user, pwd):
+        self.data['username'] = user
+        self.data['userpwd'] = pwd
+        self.data['lastlogin_date'] = datetime.date.today()
+        self.save()
+    
+    def update_last_activity_date(self):
+        today = datetime.date.today()
+        self.data['last_key_validation_date'] = today
+        self.data['lastlogin_date'] = today
+
+    def logout_user(self):
+        self.data.pop('username', None)
+        self.data.pop('userpwd', None)
+        self.data.pop('lastlogin_date', None)
+        self.save()