Check if notice is present before add

To prevent duplications we need to check wether notice is already
present on talkpage

Related Task: [https://fs.golderweb.de/index.php?do=details&task_id=88 FS#88]

bots/markpages.py

@@ -142,7 +142,12 @@ class MarkPagesBot( CurrentPageBot ):  # sets 'current_page' on each treat()
         other template in leading section
         """
         # The notice to add
-        notice = self.current_page.redfam.generate_disc_notice_template()
+        self.disc_notice = \
+            self.current_page.redfam.generate_disc_notice_template()
+
+        # Check if it is already present in wikicode
+        if self.disc_notice_present():
+            return False
 
         # Find the right place to insert notice template
         # Therfore we need the first section (if there is one)
@@ -156,16 +161,43 @@ class MarkPagesBot( CurrentPageBot ):  # sets 'current_page' on each treat()
 
             # If there is one, add notice after this
             if ltemplate:
-                self.current_wikicode.insert_after(ltemplate, notice )
+                self.current_wikicode.insert_after(ltemplate, self.disc_notice)
 
                 # To have it in its own line we need to add a linbreak before
-                self.current_wikicode.insert_before(notice, "\n" )
+                self.current_wikicode.insert_before(self.disc_notice, "\n" )
 
             # If there is no template, add before first element on page
             else:
-                self.current_wikicode.insert( 0, notice )
+                self.current_wikicode.insert( 0, self.disc_notice )
 
         # If there is no leadsec (and therefore no template in it, we will add
         # before the first element
         else:
-            self.current_wikicode.insert( 0, notice )
+            self.current_wikicode.insert( 0, self.disc_notice )
+
+        # Notice was added
+        return True
+
+    def disc_notice_present(self):
+        """
+        Checks if disc notice which shall be added is already present.
+        """
+        # Iterate over Templates with same name (if any) to search equal
+        # Link to decide if they are the same
+        for present_notice in self.current_wikicode.ifilter_templates(
+                matches=self.disc_notice.name ):
+
+            # Get reddisc page.title of notice to add
+            add_notice_link_tile = self.disc_notice.get(
+                "Diskussion").partition("#")[0]
+            # Get reddisc page.title of possible present notice
+            present_notice_link_tile = present_notice.get(
+                "Diskussion").partition("#")[0]
+
+            # If those are equal, notice is already present
+            if add_notice_link_tile == present_notice_link_tile:
+                return True
+
+        # If nothing is found, loop will run till its end
+        else:
+            return False