Add constant for search strings

Author: jacomago

server/recceiver/cfstore.py

@@ -27,6 +27,7 @@
 __all__ = ["CFProcessor"]
 
 RECCEIVERID_DEFAULT = socket.gethostname()
+DEFAULT_MAX_CHANNEL_NAME_QUERY_LENGTH = 600
 
 
 @dataclass
@@ -651,6 +652,8 @@ def fetch_existing_channels(
 ) -> Dict[str, CFChannel]:
     """Fetch from Channel Finder the existing channels as CFChannel given the new channel names.
 
+    Collects the names together to make a bunch of combined queries.
+
     Args:
         new_channels: The new channels to fetch.
         client: The Channel Finder client.
@@ -667,7 +670,7 @@ def fetch_existing_channels(
     for channel_name in new_channels:
         if not searchString:
             searchString = channel_name
-        elif len(searchString) + len(channel_name) < 600:
+        elif len(searchString) + len(channel_name) < DEFAULT_MAX_CHANNEL_NAME_QUERY_LENGTH:
             searchString = searchString + "|" + channel_name
         else:
             searchStrings.append(searchString)