From 4e88f3927eb7a50dda5c4574c2e02add1ea30e59 Mon Sep 17 00:00:00 2001
From: Daniel Simpson <daniel_simpson1988@hotmail.com>
Date: Thu, 4 Feb 2021 12:25:51 +1100
Subject: [PATCH] Add ability to auto-number relationships for complex diagrams

---
 C4.puml | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/C4.puml b/C4.puml
index 2c8d396..26df7c8 100644
--- a/C4.puml
+++ b/C4.puml
@@ -85,11 +85,33 @@ left to right direction
 ' Relationship
 ' ##################################
 
+!$relationshipIndex = 0
+!$autoNumberRelationships = 0
+
+!procedure AUTONUMBER_RELATIONSHIPS()
+  !$autoNumberRelationships = 1
+!endprocedure
+
+!procedure INCREMENT_RELATIONSHIP_INDEX()
+  !$relationshipIndex = $relationshipIndex + 1
+!endprocedure
+
 !unquoted procedure Rel_($alias1, $alias2, $label, $direction="")
-$alias1 $direction $alias2 : **$label**
+!if ($autoNumberRelationships)
+  INCREMENT_RELATIONSHIP_INDEX()
+  $alias1 $direction $alias2 : **$relationshipIndex. $label**
+!else
+  $alias1 $direction $alias2 : **$label**
+!endif
 !endprocedure
+
 !unquoted procedure Rel_($alias1, $alias2, $label, $techn, $direction="")
-$alias1 $direction $alias2 : **$label**\n//<size:$TECHN_FONT_SIZE>[$techn]</size>//
+!if ($autoNumberRelationships)
+  INCREMENT_RELATIONSHIP_INDEX()
+  $alias1 $direction $alias2 : **$relationshipIndex. $label**\n//<size:$TECHN_FONT_SIZE>[$techn]</size>//
+!else
+  $alias1 $direction $alias2 : **$label**\n//<size:$TECHN_FONT_SIZE>[$techn]</size>//
+!endif
 !endprocedure
 
 !unquoted procedure Rel($from, $to, $label)