Added an easy-to-use macro that can be used in scenarios...

...to display a warning when the AI is playing a side it doesn't know
how to play.

data/core/macros/scenario-utils.cfg

@@ -109,3 +109,45 @@ Gg          , 1 Gg        , 2 Gg        , Gg
 Gg          , Gg          , Gg          , Gg         
 "
 #enddef
+
+#define AI_CANT_PLAY SIDES
+    # Displays a standard warning at the start of the first AI turn for each
+    # given side about the AI not knowing how to play this side properly. Use
+    # this to tag sides intended solely for human players in special multiplayer
+    # scenarios (ones with shops, custom right-click options and such).
+    #
+    # Example:
+    # ! {AI_CANT_PLAY 1,2,3,4}
+    [event]
+        name=ai turn
+        first_time_only=no
+
+        [if]
+            [have_unit]
+                side=$side_number
+
+                [and]
+                    side={SIDES}
+                [/and]
+            [/have_unit]
+
+            [variable]
+                name=side_$side_number|_ai_warning_displayed
+                not_equals=yes
+            [/variable]
+
+            [then]
+                [message]
+                    speaker=narrator
+                    message= _ "The computer player might not be able to play side $side_number properly in this scenario. Side $side_number is intended to be played by a human player."
+                    image=icons/icon-ai.png
+                [/message]
+
+                [set_variable]
+                    name=side_$side_number|_ai_warning_displayed
+                    value=yes
+                [/set_variable]
+            [/then]
+        [/if]
+    [/event]
+#enddef