wmllint: validate values of [campaign] rank=

changelog.md

@@ -15,6 +15,7 @@
  ### User interface
  ### WML Engine
  ### Miscellaneous and Bug Fixes
+   * wmllint now validates `rank=` values in `[campaign]` (issue #7224)
 
 ## Version 1.17.11
  ### Campaigns

data/tools/wmllint

@@ -1687,6 +1687,20 @@ def local_sanity_check(filename, nav, key, prefix, value, comment):
             nextrefs.append((filename, nav.lineno, value))
         if key == 'id':
             scenario_to_filename[value] = filename
+    # Check for campaign rank and warn if an unconventional value is found
+    if parent == "[campaign]":
+        if key == "rank" and not ignored:
+            try:
+                campaign_rank = int(value)
+                # assume that UMCs are into the data/add-ons directory and mainline is into data/campaigns   
+                if "add-ons" in filename:
+                    if campaign_rank < 300:
+                        print(errlead + "rank for add-on campaigns should be greater than or equal to 300")
+                else:
+                    if campaign_rank >= 300 or (campaign_rank % 5) != 0:
+                        print(errlead + "rank for mainline campaigns should be a multiple of 5 between 0 and 300")  
+            except ValueError:
+                print(errlead + "rank must be a numeric value")
 
 def global_sanity_check_events(filename, lines):
     """Part of global_sanity_check which finds each [event] tag.