Fix construction DoAfter results not setting current edge index.

Fixes #5061

Content.Server/Construction/ConstructionSystem.Interactions.cs

@@ -54,7 +54,13 @@ namespace Content.Server.Construction
             // If we're currently in an edge, we'll let the edge handle or validate the interaction.
             if (GetCurrentEdge(uid, construction) is {} edge)
             {
-                return HandleEdge(uid, ev, edge, validation, construction);
+                var result = HandleEdge(uid, ev, edge, validation, construction);
+
+                // Reset edge index to none if this failed...
+                if (!validation && result is HandleResult.False && construction.StepIndex == 0)
+                    construction.EdgeIndex = null;
+
+                return result;
             }
 
             // If we're not on an edge, let the node handle or validate the interaction.
@@ -85,10 +91,17 @@ namespace Content.Server.Construction
                 if (HandleEdge(uid, ev, edge, validation, construction) is var result and not HandleResult.False)
                 {
                     // Only a True result may modify the state.
-                    // In the case of DoAfter, we don't want it modifying the state yet, other than the waiting flag.
+                    // In the case of DoAfter, it's only allowed to modify the waiting flag and the current edge index.
                     // In the case of validated, it should NEVER modify the state at all.
                     if (result is not HandleResult.True)
+                    {
+                        if (result is HandleResult.DoAfter)
+                        {
+                            construction.EdgeIndex = i;
+                        }
+
                         return result;
+                    }
 
                     // If we're not on the same edge as we were before, that means handling that edge changed the node.
                     if (construction.Node != node.Name)

Resources/Changelog/Parts/doafter.yml

@@ -0,0 +1,4 @@
+author: Zumorica
+changes:
+  - type: Fix # One of the following: Add, Remove, Tweak, Fix
+    message: Fix rare construction bug where some interactions would be incorrect.

Resources/Prototypes/Recipes/Construction/Graphs/machine.yml

@@ -6,7 +6,7 @@
       actions:
         - !type:SpawnPrototype
           prototype: SheetSteel1
-        - !type:DeleteEntity {}
+        - !type:DeleteEntity
       edges:
         - to: missingWires
           completed:
@@ -22,11 +22,11 @@
       actions:
         - !type:SpriteStateChange
           state: "box_0"
-        - !type:EmptyAllContainers {}
+        - !type:EmptyAllContainers
       edges:
         - to: machineFrame
           conditions:
-            - !type:EntityAnchored {}
+            - !type:EntityAnchored
           steps:
             - material: Cable
         - to: start
@@ -37,7 +37,7 @@
             - !type:SpawnPrototype
               prototype: SheetSteel1
               amount: 5
-            - !type:DeleteEntity {}
+            - !type:DeleteEntity
           steps:
             - tool: Screwing
               doAfter: 2
@@ -60,7 +60,7 @@
 
         - to: missingWires
           conditions:
-            - !type:EntityAnchored {}
+            - !type:EntityAnchored
           completed:
             - !type:SpawnPrototype
               prototype: CableApcStack1
@@ -68,8 +68,8 @@
             - tool: Prying
               doAfter: 2
               completed:
-                - !type:EmptyAllContainers {}
-                - !type:MachineFrameRegenerateProgress {}
+                - !type:EmptyAllContainers
+                - !type:MachineFrameRegenerateProgress
             - tool: Cutting
               doAfter: 0.25
 
@@ -82,8 +82,8 @@
       edges:
         - to: machineFrame
           conditions:
-            - !type:EntityAnchored {}
-            - !type:WirePanel {}
+            - !type:EntityAnchored
+            - !type:WirePanel
           steps:
             - tool: Prying
               doAfter: 0.25