src/pages/VisProgPage/VisProg.tsx

@@ -39,6 +39,7 @@ const selector = (state: FlowState) => ({
   nodes: state.nodes,
   edges: state.edges,
   onNodesChange: state.onNodesChange,
+  onEdgesDelete: state.onEdgesDelete,
   onEdgesChange: state.onEdgesChange,
   onConnect: state.onConnect,
   onReconnectStart: state.onReconnectStart,
@@ -62,6 +63,7 @@ const VisProgUI = () => {
   const {
     nodes, edges,
     onNodesChange,
+    onEdgesDelete,
     onEdgesChange,
     onConnect,
     onReconnect,
@@ -91,6 +93,7 @@ const VisProgUI = () => {
         defaultEdgeOptions={DEFAULT_EDGE_OPTIONS}
         nodeTypes={NodeTypes}
         onNodesChange={onNodesChange}
+        onEdgesDelete={onEdgesDelete}
         onEdgesChange={onEdgesChange}
         onReconnect={onReconnect}
         onReconnectStart={onReconnectStart}

src/pages/VisProgPage/visualProgrammingUI/NodeRegistry.ts

@@ -1,14 +1,50 @@
-import StartNode, { StartConnects, StartReduce } from "./nodes/StartNode";
-import EndNode, { EndConnects, EndReduce } from "./nodes/EndNode";
-import PhaseNode, { PhaseConnects, PhaseReduce } from "./nodes/PhaseNode";
-import NormNode, { NormConnects, NormReduce } from "./nodes/NormNode";
+import EndNode, {
+  EndConnectionTarget,
+  EndConnectionSource,
+  EndDisconnectionTarget,
+  EndDisconnectionSource,
+  EndReduce
+} from "./nodes/EndNode";
 import { EndNodeDefaults } from "./nodes/EndNode.default";
+import StartNode, {
+  StartConnectionTarget,
+  StartConnectionSource,
+  StartDisconnectionTarget,
+  StartDisconnectionSource,
+  StartReduce
+} from "./nodes/StartNode";
 import { StartNodeDefaults } from "./nodes/StartNode.default";
+import PhaseNode, {
+  PhaseConnectionTarget,
+  PhaseConnectionSource,
+  PhaseDisconnectionTarget,
+  PhaseDisconnectionSource,
+  PhaseReduce
+} from "./nodes/PhaseNode";
 import { PhaseNodeDefaults } from "./nodes/PhaseNode.default";
+import NormNode, {
+  NormConnectionTarget,
+  NormConnectionSource,
+  NormDisconnectionTarget,
+  NormDisconnectionSource,
+  NormReduce
+} from "./nodes/NormNode";
 import { NormNodeDefaults } from "./nodes/NormNode.default";
-import GoalNode, { GoalConnects, GoalReduce } from "./nodes/GoalNode";
+import GoalNode, {
+  GoalConnectionTarget,
+  GoalConnectionSource,
+  GoalDisconnectionTarget,
+  GoalDisconnectionSource,
+  GoalReduce
+} from "./nodes/GoalNode";
 import { GoalNodeDefaults } from "./nodes/GoalNode.default";
-import TriggerNode, { TriggerConnects, TriggerReduce } from "./nodes/TriggerNode";
+import TriggerNode, {
+  TriggerConnectionTarget,
+  TriggerConnectionSource,
+  TriggerDisconnectionTarget,
+  TriggerDisconnectionSource,
+  TriggerReduce
+} from "./nodes/TriggerNode";
 import { TriggerNodeDefaults } from "./nodes/TriggerNode.default";
 
 /**
@@ -60,15 +96,51 @@ export const NodeReduces = {
 /**
  * Connection functions for each node type.
  * 
- * These functions define how nodes of a particular type can connect to other nodes.
+ * These functions define any additional actions a node may perform
+ * when a new connection is made
  */
-export const NodeConnects = {
-  start: StartConnects,
-  end: EndConnects,
-  phase: PhaseConnects,
-  norm: NormConnects,
-  goal: GoalConnects,
-  trigger: TriggerConnects, 
+export const NodeConnections = {
+  Targets: {
+    start: StartConnectionTarget,
+    end: EndConnectionTarget,
+    phase: PhaseConnectionTarget,
+    norm: NormConnectionTarget,
+    goal: GoalConnectionTarget,
+    trigger: TriggerConnectionTarget,
+  },
+  Sources: {
+    start: StartConnectionSource,
+    end: EndConnectionSource,
+    phase: PhaseConnectionSource,
+    norm: NormConnectionSource,
+    goal: GoalConnectionSource,
+    trigger: TriggerConnectionSource,
+  }
+}
+
+/**
+ * Disconnection functions for each node type.
+ *
+ * These functions define any additional actions a node may perform
+ * when a connection is disconnected
+ */
+export const NodeDisconnections = {
+  Targets: {
+    start: StartDisconnectionTarget,
+    end: EndDisconnectionTarget,
+    phase: PhaseDisconnectionTarget,
+    norm: NormDisconnectionTarget,
+    goal: GoalDisconnectionTarget,
+    trigger: TriggerDisconnectionTarget,
+  },
+  Sources: {
+    start: StartDisconnectionSource,
+    end: EndDisconnectionSource,
+    phase: PhaseDisconnectionSource,
+    norm: NormDisconnectionSource,
+    goal: GoalDisconnectionSource,
+    trigger: TriggerDisconnectionSource,
+  },
 }
 
 /**

src/pages/VisProgPage/visualProgrammingUI/VisProgStores.tsx

@@ -9,7 +9,12 @@ import {
   type XYPosition,
 } from '@xyflow/react';
 import type { FlowState } from './VisProgTypes';
-import { NodeDefaults, NodeConnects, NodeDeletes } from './NodeRegistry';
+import {
+  NodeDefaults,
+  NodeConnections as NodeCs,
+  NodeDisconnections as NodeDs,
+  NodeDeletes
+} from './NodeRegistry';
 import { UndoRedo } from "./EditorUndoRedo.ts";
 
 
@@ -71,10 +76,25 @@ const useFlowStore = create<FlowState>(UndoRedo((set, get) => ({
    */
   onNodesChange: (changes) => set({nodes: applyNodeChanges(changes, get().nodes)}),
 
+  onEdgesDelete: (edges) => {
+
+    // we make sure any affected nodes get updated to reflect removal of edges
+    edges.forEach((edge) => {
+        const nodes = get().nodes;
+
+        const sourceNode = nodes.find((n) => n.id == edge.source);
+        const targetNode = nodes.find((n) => n.id == edge.target);
+
+        if (sourceNode) { NodeDs.Sources[sourceNode.type as keyof typeof NodeDs.Sources](sourceNode, edge.target); }
+        if (targetNode) { NodeDs.Targets[targetNode.type as keyof typeof NodeDs.Targets](targetNode, edge.source); }
+      });
+  },
   /**
    * Handles changes to edges triggered by ReactFlow.
    */
-  onEdgesChange: (changes) => set({ edges: applyEdgeChanges(changes, get().edges) }),
+  onEdgesChange: (changes) => {
+    set({ edges: applyEdgeChanges(changes, get().edges) })
+  },
 
   /**
    * Handles creating a new connection between nodes.
@@ -82,32 +102,16 @@ const useFlowStore = create<FlowState>(UndoRedo((set, get) => ({
    */
   onConnect: (connection) => {
     get().pushSnapshot();
+    set({edges: addEdge(connection, get().edges)});
 
-    const edges = addEdge(connection, get().edges);
+    // We make sure to perform any required data updates on the newly connected nodes
     const nodes = get().nodes;
-    // connection has: { source, sourceHandle, target, targetHandle }
-    // Let's find the source and target ID's.
+
     const sourceNode = nodes.find((n) => n.id == connection.source);
     const targetNode = nodes.find((n) => n.id == connection.target);
 
-    // In case the nodes weren't found, return basic functionality.
-    if ( sourceNode == undefined
-      || targetNode == undefined
-      || sourceNode.type == undefined
-      || targetNode.type == undefined
-    ){
-      set({ nodes, edges });
-      return;
-    }
-
-    // We should find out how their data changes by calling their respective functions.
-    const sourceConnectFunction = NodeConnects[sourceNode.type as keyof typeof NodeConnects]
-    const targetConnectFunction = NodeConnects[targetNode.type as keyof typeof NodeConnects]
-
-    // We're going to have to update their data based on how they want to update it.
-    sourceConnectFunction(sourceNode, targetNode, true)
-    targetConnectFunction(targetNode, sourceNode, false)
-    set({ nodes, edges });
+    if (sourceNode) { NodeCs.Sources[sourceNode.type as keyof typeof NodeCs.Sources](sourceNode, connection.target); }
+    if (targetNode) { NodeCs.Targets[targetNode.type as keyof typeof NodeCs.Targets](targetNode, connection.source); }
   },
 
   /**
@@ -116,6 +120,22 @@ const useFlowStore = create<FlowState>(UndoRedo((set, get) => ({
   onReconnect: (oldEdge, newConnection) => {
     get().edgeReconnectSuccessful = true;
     set({ edges: reconnectEdge(oldEdge, newConnection, get().edges) });
+
+    // We make sure to perform any required data updates on the newly reconnected nodes
+    const nodes = get().nodes;
+
+    const oldSourceNode = nodes.find((n) => n.id == oldEdge.source)!;
+    const oldTargetNode = nodes.find((n) => n.id == oldEdge.target)!;
+    const newSourceNode = nodes.find((n) => n.id == newConnection.source)!;
+    const newTargetNode = nodes.find((n) => n.id == newConnection.target)!;
+
+    if (oldSourceNode === newSourceNode && oldTargetNode === newTargetNode) return;
+
+    NodeCs.Sources[newSourceNode.type as keyof typeof NodeCs.Sources](newSourceNode, newConnection.target);
+    NodeCs.Targets[newTargetNode.type as keyof typeof NodeCs.Targets](newTargetNode, newConnection.source);
+
+    NodeDs.Sources[oldSourceNode.type as keyof typeof NodeDs.Sources](oldSourceNode, oldEdge.target);
+    NodeDs.Targets[oldTargetNode.type as keyof typeof NodeDs.Targets](oldTargetNode, oldEdge.source);
   },
 
   onReconnectStart: () => {
@@ -128,11 +148,21 @@ const useFlowStore = create<FlowState>(UndoRedo((set, get) => ({
    * if it is not reconnected to a node after detaching it
    *
    * @param _evt - the event
-   * @param {{id: string}} edge - the described edge
+   * @param edge - the described edge
    */
   onReconnectEnd: (_evt, edge) => {
     if (!get().edgeReconnectSuccessful) {
+      // delete the edge from the flowState
       set({ edges: get().edges.filter((e) => e.id !== edge.id) });
+
+      // update node data to reflect the dropped edge
+      const nodes = get().nodes;
+
+      const sourceNode = nodes.find((n) => n.id == edge.source)!;
+      const targetNode = nodes.find((n) => n.id == edge.target)!;
+
+      NodeDs.Sources[sourceNode.type as keyof typeof NodeDs.Sources](sourceNode, edge.target);
+      NodeDs.Targets[targetNode.type as keyof typeof NodeDs.Targets](targetNode, edge.source);
     }
     set({ edgeReconnectSuccessful: true });
   },

src/pages/VisProgPage/visualProgrammingUI/VisProgTypes.tsx

@@ -1,5 +1,5 @@
 // VisProgTypes.ts
-import type { Edge, OnNodesChange, OnEdgesChange, OnConnect, OnReconnect, Node } from '@xyflow/react';
+import type {Edge, OnNodesChange, OnEdgesChange, OnConnect, OnReconnect, Node, OnEdgesDelete} from '@xyflow/react';
 import type { NodeTypes } from './NodeRegistry';
 import type {FlowSnapshot} from "./EditorUndoRedo.ts";
 
@@ -27,6 +27,8 @@ export type FlowState = {
   /** Handler for changes to nodes triggered by ReactFlow */
   onNodesChange: OnNodesChange;
 
+  onEdgesDelete: OnEdgesDelete;
+
   /** Handler for changes to edges triggered by ReactFlow */
   onEdgesChange: OnEdgesChange;
 
@@ -44,7 +46,7 @@ export type FlowState = {
    * @param _ - event or unused parameter
    * @param edge - the edge that finished reconnecting
    */
-  onReconnectEnd: (_: unknown, edge: { id: string }) => void;
+  onReconnectEnd: (_: unknown, edge: Edge) => void;
 
   /**
    * Deletes a node and any connected edges.

src/pages/VisProgPage/visualProgrammingUI/nodes/EndNode.tsx

@@ -5,7 +5,8 @@ import {
   type Node,
 } from '@xyflow/react';
 import { Toolbar } from '../components/NodeComponents';
-import styles from '../../VisProg.module.css'; 
+import styles from '../../VisProg.module.css';
+
 
 /**
  * The typing of this node's data
@@ -51,10 +52,37 @@ export function EndReduce(node: Node, _nodes: Node[]) {
 }
 
 /**
- * Any connection functionality that should get called when a connection is made to this node type (end)
- * @param _thisNode the node of which the functionality gets called
- * @param _otherNode the other node which has connected
- * @param _isThisSource whether this node is the one that is the source of the connection
+ * This function is called whenever a connection is made with this node type as the target
+ * @param _thisNode the node of this node type which function is called
+ * @param _sourceNodeId the source of the received connection
  */
-export function EndConnects(_thisNode: Node, _otherNode: Node, _isThisSource: boolean) {
+export function EndConnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is made with this node type as the source
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the created connection
+ */
+export function EndConnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the target
+ * @param _thisNode the node of this node type which function is called
+ * @param _sourceNodeId the source of the disconnected connection
+ */
+export function EndDisconnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the source
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the diconnected connection
+ */
+export function EndDisconnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
 }

src/pages/VisProgPage/visualProgrammingUI/nodes/GoalNode.tsx

@@ -75,8 +75,8 @@ export default function GoalNode({id, data}: NodeProps<GoalNode>) {
 
 /**
  * Reduces each Goal, including its children down into its relevant data.
- * @param node: The Node Properties of this node.
- * @param _nodes: all the nodes in the graph
+ * @param node The Node Properties of this node.
+ * @param _nodes all the nodes in the graph
  */
 export function GoalReduce(node: Node, _nodes: Node[]) {
   const data = node.data as GoalNodeData;
@@ -89,11 +89,37 @@ export function GoalReduce(node: Node, _nodes: Node[]) {
 }
 
 /**
- * This function is called whenever a connection is made with this node type (Goal)
+ * This function is called whenever a connection is made with this node type as the target
  * @param _thisNode the node of this node type which function is called
- * @param _otherNode the other node which was part of the connection
- * @param _isThisSource whether this instance of the node was the source in the connection, true = yes.
+ * @param _sourceNodeId the source of the received connection
  */
-export function GoalConnects(_thisNode: Node, _otherNode: Node, _isThisSource: boolean) {
-  // Replace this for connection logic
+export function GoalConnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is made with this node type as the source
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the created connection
+ */
+export function GoalConnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the target
+ * @param _thisNode the node of this node type which function is called
+ * @param _sourceNodeId the source of the disconnected connection
+ */
+export function GoalDisconnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the source
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the diconnected connection
+ */
+export function GoalDisconnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
 }

src/pages/VisProgPage/visualProgrammingUI/nodes/NormNode.tsx

@@ -60,8 +60,8 @@ export default function NormNode(props: NodeProps<NormNode>) {
 
 /**
  * Reduces each Norm, including its children down into its relevant data.
- * @param node: The Node Properties of this node.
- * @param _nodes: all the nodes in the graph
+ * @param node The Node Properties of this node.
+ * @param _nodes all the nodes in the graph
  */
 export function NormReduce(node: Node, _nodes: Node[]) {
   const data = node.data as NormNodeData;
@@ -73,10 +73,37 @@ export function NormReduce(node: Node, _nodes: Node[]) {
 }
 
 /**
- * This function is called whenever a connection is made with this node type (Norm)
+ * This function is called whenever a connection is made with this node type as the target
  * @param _thisNode the node of this node type which function is called
- * @param _otherNode the other node which was part of the connection
- * @param _isThisSource whether this instance of the node was the source in the connection, true = yes.
+ * @param _sourceNodeId the source of the received connection
  */
-export function NormConnects(_thisNode: Node, _otherNode: Node, _isThisSource: boolean) {
+export function NormConnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is made with this node type as the source
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the created connection
+ */
+export function NormConnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the target
+ * @param _thisNode the node of this node type which function is called
+ * @param _sourceNodeId the source of the disconnected connection
+ */
+export function NormDisconnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the source
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the diconnected connection
+ */
+export function NormDisconnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
 }

src/pages/VisProgPage/visualProgrammingUI/nodes/PhaseNode.tsx

@@ -2,11 +2,11 @@ import {
   Handle,
   type NodeProps,
   Position,
-  type Node,
+  type Node
 } from '@xyflow/react';
 import { Toolbar } from '../components/NodeComponents';
 import styles from '../../VisProg.module.css';
-import { NodeReduces, NodesInPhase, NodeTypes } from '../NodeRegistry';
+import { NodeReduces, NodesInPhase, NodeTypes} from '../NodeRegistry';
 import useFlowStore from '../VisProgStores';
 import { TextField } from '../../../../components/TextField';
 
@@ -104,14 +104,45 @@ export function PhaseReduce(node: Node, nodes: Node[]) {
 }
 
 /**
- * This function is called whenever a connection is made with this node type (phase)
- * @param thisNode the node of this node type which function is called
- * @param otherNode the other node which was part of the connection
- * @param isThisSource whether this instance of the node was the source in the connection, true = yes.
+ * This function is called whenever a connection is made with this node type as the target (phase)
+ * @param _thisNode the node of this node type which function is called
+ * @param _sourceNodeId the source of the received connection
  */
-export function PhaseConnects(thisNode: Node, otherNode: Node, isThisSource: boolean) {
-  const node = thisNode as PhaseNode
+export function PhaseConnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  const node = _thisNode as PhaseNode
   const data = node.data as PhaseNodeData
-  if (!isThisSource)
-    data.children.push(otherNode.id)
+  // we only add none phase nodes to the children
+  if (!(useFlowStore.getState().nodes.find((node) => node.id === _sourceNodeId && node.type === 'phase'))) {
+    data.children.push(_sourceNodeId)
+  }
+
+}
+
+/**
+ * This function is called whenever a connection is made with this node type as the source (phase)
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the created connection
+ */
+export function PhaseConnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the target (phase)
+ * @param _thisNode the node of this node type which function is called
+ * @param _sourceNodeId the source of the disconnected connection
+ */
+export function PhaseDisconnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  const node = _thisNode as PhaseNode
+  const data = node.data as PhaseNodeData
+  data.children = data.children.filter((child) => { if (child != _sourceNodeId) return child; });
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the source (phase)
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the diconnected connection
+ */
+export function PhaseDisconnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
 }

src/pages/VisProgPage/visualProgrammingUI/nodes/StartNode.tsx

@@ -51,10 +51,37 @@ export function StartReduce(node: Node, _nodes: Node[]) {
 }
 
 /**
- * This function is called whenever a connection is made with this node type (start)
+ * This function is called whenever a connection is made with this node type as the target
  * @param _thisNode the node of this node type which function is called
- * @param _otherNode the other node which was part of the connection
- * @param _isThisSource whether this instance of the node was the source in the connection, true = yes.
+ * @param _sourceNodeId the source of the received connection
  */
-export function StartConnects(_thisNode: Node, _otherNode: Node, _isThisSource: boolean) {
+export function StartConnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is made with this node type as the source
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the created connection
+ */
+export function StartConnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the target
+ * @param _thisNode the node of this node type which function is called
+ * @param _sourceNodeId the source of the disconnected connection
+ */
+export function StartDisconnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the source
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the diconnected connection
+ */
+export function StartDisconnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
 }

src/pages/VisProgPage/visualProgrammingUI/nodes/TriggerNode.tsx

@@ -102,13 +102,39 @@ export function TriggerReduce(node: Node, _nodes: Node[]) {
 }
 
 /**
- * This function is called whenever a connection is made with this node type (trigger)
+ * This function is called whenever a connection is made with this node type as the target
  * @param _thisNode the node of this node type which function is called
- * @param _otherNode the other node which was part of the connection
- * @param _isThisSource whether this instance of the node was the source in the connection, true = yes.
+ * @param _sourceNodeId the source of the received connection
  */
-export function TriggerConnects(_thisNode: Node, _otherNode: Node, _isThisSource: boolean) {
-  
+export function TriggerConnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is made with this node type as the source
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the created connection
+ */
+export function TriggerConnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the target
+ * @param _thisNode the node of this node type which function is called
+ * @param _sourceNodeId the source of the disconnected connection
+ */
+export function TriggerDisconnectionTarget(_thisNode: Node, _sourceNodeId: string) {
+  // no additional connection logic exists yet
+}
+
+/**
+ * This function is called whenever a connection is disconnected with this node type as the source
+ * @param _thisNode the node of this node type which function is called
+ * @param _targetNodeId the target of the diconnected connection
+ */
+export function TriggerDisconnectionSource(_thisNode: Node, _targetNodeId: string) {
+  // no additional connection logic exists yet
 }
 
 // Definitions for the possible triggers, being keywords and emotions

test/pages/visProgPage/visualProgrammingUI/VisProgStores.test.tsx

@@ -1,4 +1,7 @@
 import {act} from '@testing-library/react';
+import type {Connection, Edge, Node} from "@xyflow/react";
+import { NodeDisconnections } from "../../../../src/pages/VisProgPage/visualProgrammingUI/NodeRegistry.ts";
+import type {PhaseNodeData} from "../../../../src/pages/VisProgPage/visualProgrammingUI/nodes/PhaseNode.tsx";
 import useFlowStore from '../../../../src/pages/VisProgPage/visualProgrammingUI/VisProgStores.tsx';
 import { mockReactFlow } from '../../../setupFlowTests.ts';
 
@@ -6,18 +9,187 @@ beforeAll(() => {
   mockReactFlow();
 });
 
+// default state values for testing,
+const normNode: Node = {
+  id: 'norm-1',
+  type: 'norm',
+  position: { x: 0, y: 0 },
+  data: {
+    label: 'Test Norm',
+    droppable: true,
+    norm: 'Test',
+    hasReduce: true,
+  },
+};
+
+const phaseNode: Node = {
+  id: 'phase-1',
+  type: 'phase',
+  position: { x: 100, y: 0 },
+  data: {
+    label: 'Phase 1',
+    droppable: true,
+    children: ["norm-1"],
+    hasReduce: true,
+  },
+};
+
+const testEdge: Edge = {
+  id: 'xy-edge__1-2',
+  source: 'norm-1',
+  target: 'phase-1',
+  sourceHandle: null,
+  targetHandle: null,
+}
+
+const testStateReconnectEnd = {
+  nodes: [phaseNode, normNode],
+  edges: [testEdge],
+}
+
+const phaseNodeUnconnected = {
+  id: 'phase-2',
+  type: 'phase',
+  position: { x: 100, y: 0 },
+  data: {
+    label: 'Phase 2',
+    droppable: true,
+    children: [],
+    hasReduce: true,
+  },
+};
+
+const testConnection: Connection = {
+  source: 'norm-1',
+  target: 'phase-2',
+  sourceHandle: null,
+  targetHandle: null,
+}
+const testStateOnConnect = {
+  nodes: [phaseNodeUnconnected, normNode],
+  edges: [],
+}
+
 describe('FlowStore Functionality', () => {
   describe('Node changes', () => {
     // currently just using a single function from the ReactFlow library,
     // so testing would mean we are testing already tested behavior.
     // if implementation gets modified tests should be added for custom behavior
   });
+  describe('ReactFlow onEdgesDelete', () => {
+    test('Deleted edge is reflected in removed phaseNode child', () => {
+      const {onEdgesDelete} = useFlowStore.getState();
+
+      useFlowStore.setState({
+        nodes: [{
+          id: 'phase-1',
+          type: 'phase',
+          position: { x: 100, y: 0 },
+          data: {
+            label: 'Phase 1',
+            droppable: true,
+            children: ["norm-1"],
+            hasReduce: true,
+          },
+        },{
+          id: 'norm-1',
+          type: 'norm',
+          position: { x: 0, y: 0 },
+          data: {
+            label: 'Test Norm',
+            droppable: true,
+            norm: 'Test',
+            hasReduce: true,
+          },
+        }],
+        edges: [], // edges is empty as onEdgesDelete is triggered after the edges are deleted
+      })
+
+      act(() => {
+        onEdgesDelete([testEdge])
+      });
+
+      const outcome = useFlowStore.getState();
+      expect((outcome.nodes[0].data as PhaseNodeData).children.length).toBe(0);
+    })
+    test('Deleted edge is reflected in phaseNode,even if normNode was already deleted and caused edge removal', () => {
+      const { onEdgesDelete } = useFlowStore.getState();
+      useFlowStore.setState({
+        nodes: [{
+          id: 'phase-1',
+          type: 'phase',
+          position: { x: 100, y: 0 },
+          data: {
+            label: 'Phase 1',
+            droppable: true,
+            children: ["norm-1"],
+            hasReduce: true,
+          },
+        }],
+        edges: [], // edges is empty as onEdgesDelete is triggered after the edges are deleted
+      })
+
+      act(() => {
+        onEdgesDelete([testEdge]);
+      })
+
+      const outcome = useFlowStore.getState();
+      expect((outcome.nodes[0].data as PhaseNodeData).children.length).toBe(0);
+    })
+    test('edge removal resulting from deletion of targetNode calls only the connection function for the sourceNode', () => {
+      const { onEdgesDelete } = useFlowStore.getState();
+      useFlowStore.setState({
+        nodes: [{
+          id: 'norm-1',
+          type: 'norm',
+          position: { x: 0, y: 0 },
+          data: {
+            label: 'Test Norm',
+            droppable: true,
+            norm: 'Test',
+            hasReduce: true,
+          },
+        }],
+        edges: [], // edges is empty as onEdgesDelete is triggered after the edges are deleted
+      })
+
+      const targetDisconnectSpy = jest.spyOn(NodeDisconnections.Targets, 'phase');
+      const sourceDisconnectSpy = jest.spyOn(NodeDisconnections.Sources, 'norm');
+
+      act(() => {
+        onEdgesDelete([testEdge]);
+      })
+
+      expect(sourceDisconnectSpy).toHaveBeenCalledWith(normNode, 'phase-1');
+      expect(targetDisconnectSpy).not.toHaveBeenCalled();
+
+      sourceDisconnectSpy.mockRestore();
+      targetDisconnectSpy.mockRestore();
+    })
+  })
   describe('Edge changes', () => {
     // currently just using a single function from the ReactFlow library,
     // so testing would mean we are testing already tested behavior.
     // if implementation gets modified tests should be added for custom behavior
   })
   describe('ReactFlow onConnect', () => {
+    test('Adds connecting node to children of phaseNode', () => {
+      const {onConnect} = useFlowStore.getState();
+      useFlowStore.setState({
+        nodes: testStateOnConnect.nodes,
+        edges: testStateOnConnect.edges
+      })
+
+      act(() => {
+        onConnect(testConnection);
+      })
+
+      const outcome = useFlowStore.getState();
+
+      // phaseNode adds the normNode to its children
+      expect((outcome.nodes[0].data as PhaseNodeData).children).toEqual(['norm-1']);
+
+    })
     test('adds an edge when onConnect is triggered', () => {
       const {onConnect} = useFlowStore.getState();
 
@@ -39,6 +211,53 @@ describe('FlowStore Functionality', () => {
     });
   });
   describe('ReactFlow onReconnect', () => {
+    test('PhaseNodes correctly change their children', () => {
+      const {onReconnect} = useFlowStore.getState();
+      useFlowStore.setState({
+        nodes: [{
+          id: 'phase-1',
+          type: 'phase',
+          position: { x: 100, y: 0 },
+          data: {
+            label: 'Phase 1',
+            droppable: true,
+            children: ["norm-1"],
+            hasReduce: true,
+          },
+        },{
+          id: 'phase-2',
+          type: 'phase',
+          position: { x: 100, y: 0 },
+          data: {
+            label: 'Phase 2',
+            droppable: true,
+            children: [],
+            hasReduce: true,
+          },
+        },{
+          id: 'norm-1',
+          type: 'norm',
+          position: { x: 0, y: 0 },
+          data: {
+            label: 'Test Norm',
+            droppable: true,
+            norm: 'Test',
+            hasReduce: true,
+          },
+        }],
+        edges: [testEdge],
+      })
+
+      act(() => {
+        onReconnect(testEdge, testConnection);
+      })
+
+      const outcome = useFlowStore.getState();
+
+      // phaseNodes lose and gain children when norm node's connection is changed from phaseNode to PhaseNodeUnconnected
+      expect((outcome.nodes[1].data as PhaseNodeData).children).toEqual(['norm-1']);
+      expect((outcome.nodes[0].data as PhaseNodeData).children).toEqual([]);
+    })
     test('reconnects an existing edge when onReconnect is triggered', () => {
       const {onReconnect} = useFlowStore.getState();
       const oldEdge = {
@@ -93,36 +312,63 @@ describe('FlowStore Functionality', () => {
       );
     });
 
+
+
     test('successfully removes edge if no successful reconnect occurred', () => {
       const {onReconnectEnd} = useFlowStore.getState();
-      useFlowStore.setState({edgeReconnectSuccessful: false});
+      useFlowStore.setState({
+        edgeReconnectSuccessful: false,
+        edges: testStateReconnectEnd.edges,
+        nodes: testStateReconnectEnd.nodes
+      });
 
       act(() => {
-        onReconnectEnd(null, {id: 'xy-edge__A-B'});
+        onReconnectEnd(null, testEdge);
       });
 
       const updatedState = useFlowStore.getState();
       expect(updatedState.edgeReconnectSuccessful).toBe(true);
       expect(updatedState.edges).toHaveLength(0);
+      expect(updatedState.nodes[0].data.children).toEqual([]);
     });
 
     test('does not remove reconnecting edge if successful reconnect occurred', () => {
       const {onReconnectEnd} = useFlowStore.getState();
+      useFlowStore.setState({
+        edgeReconnectSuccessful: true,
+        edges: [testEdge],
+        nodes: [{
+          id: 'phase-1',
+          type: 'phase',
+          position: { x: 100, y: 0 },
+          data: {
+            label: 'Phase 1',
+            droppable: true,
+            children: ["norm-1"],
+            hasReduce: true,
+          },
+        },{
+          id: 'norm-1',
+          type: 'norm',
+          position: { x: 0, y: 0 },
+          data: {
+            label: 'Test Norm',
+            droppable: true,
+            norm: 'Test',
+            hasReduce: true,
+          },
+        }]
+      });
 
       act(() => {
-        onReconnectEnd(null, {id: 'xy-edge__A-B'});
+        onReconnectEnd(null, testEdge);
       });
 
       const updatedState = useFlowStore.getState();
       expect(updatedState.edgeReconnectSuccessful).toBe(true);
       expect(updatedState.edges).toHaveLength(1);
-      expect(updatedState.edges).toMatchObject([
-        {
-          id: 'xy-edge__A-B',
-          source: 'A',
-          target: 'B'
-        }]
-      );
+      expect(updatedState.edges).toMatchObject([testEdge]);
+      expect(updatedState.nodes[0].data.children).toEqual(["norm-1"]);
     });
   });
   describe('ReactFlow deleteNode', () => {

test/pages/visProgPage/visualProgrammingUI/nodes/NormNode.test.tsx

@@ -1,8 +1,12 @@
 import { describe, it, beforeEach } from '@jest/globals';
 import { screen, waitFor } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
-import { renderWithProviders } from '../.././/./../../test-utils/test-utils';
-import NormNode, { NormReduce, NormConnects, type NormNodeData } from '../../../../../src/pages/VisProgPage/visualProgrammingUI/nodes/NormNode'
+import { renderWithProviders } from '../../../../test-utils/test-utils.tsx';
+import NormNode, {
+  NormReduce,
+  type NormNodeData,
+  NormConnectionSource, NormConnectionTarget
+} from '../../../../../src/pages/VisProgPage/visualProgrammingUI/nodes/NormNode';
 import useFlowStore from '../../../../../src/pages/VisProgPage/visualProgrammingUI/VisProgStores';
 import type { Node } from '@xyflow/react';
 import '@testing-library/jest-dom'
@@ -517,7 +521,7 @@ describe('NormNode', () => {
       };
 
       expect(() => {
-        NormConnects(normNode, phaseNode, true);
+        NormConnectionSource(normNode, phaseNode.id);
       }).not.toThrow();
     });
 
@@ -547,7 +551,7 @@ describe('NormNode', () => {
       };
 
       expect(() => {
-        NormConnects(normNode, phaseNode, false);
+        NormConnectionTarget(normNode, phaseNode.id);
       }).not.toThrow();
     });
 
@@ -565,7 +569,8 @@ describe('NormNode', () => {
       };
 
       expect(() => {
-        NormConnects(normNode, normNode, true);
+        NormConnectionTarget(normNode, normNode.id);
+        NormConnectionSource(normNode, normNode.id);
       }).not.toThrow();
     });
   });

test/pages/visProgPage/visualProgrammingUI/nodes/StartNode.test.tsx

@@ -2,8 +2,11 @@ import { describe, it } from '@jest/globals';
 import '@testing-library/jest-dom';
 import { screen } from '@testing-library/react';
 import type { Node } from '@xyflow/react';
-import { renderWithProviders } from '../.././/./../../test-utils/test-utils';
-import StartNode, { StartReduce, StartConnects } from '../../../../../src/pages/VisProgPage/visualProgrammingUI/nodes/StartNode';
+import { renderWithProviders } from '../../../../test-utils/test-utils.tsx';
+import StartNode, {
+  StartConnectionSource, StartConnectionTarget,
+  StartReduce
+} from '../../../../../src/pages/VisProgPage/visualProgrammingUI/nodes/StartNode';
 
 
 describe('StartNode', () => {
@@ -91,8 +94,8 @@ describe('StartNode', () => {
         },
       };
 
-      expect(() => StartConnects(startNode, otherNode, true)).not.toThrow();
-      expect(() => StartConnects(startNode, otherNode, false)).not.toThrow();
+      expect(() => StartConnectionSource(startNode, otherNode.id)).not.toThrow();
+      expect(() => StartConnectionTarget(startNode, otherNode.id)).not.toThrow();
     });
   });
 });

test/pages/visProgPage/visualProgrammingUI/nodes/TriggerNode.test.tsx

@@ -1,8 +1,13 @@
 import { describe, it, beforeEach } from '@jest/globals';
 import { screen, waitFor } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
-import { renderWithProviders } from '../.././/./../../test-utils/test-utils';
-import TriggerNode, { TriggerReduce, TriggerConnects, TriggerNodeCanConnect, type TriggerNodeData } from '../../../../../src/pages/VisProgPage/visualProgrammingUI/nodes/TriggerNode';
+import { renderWithProviders } from '../../../../test-utils/test-utils.tsx';
+import TriggerNode, {
+  TriggerReduce,
+  TriggerNodeCanConnect,
+  type TriggerNodeData,
+  TriggerConnectionSource, TriggerConnectionTarget
+} from '../../../../../src/pages/VisProgPage/visualProgrammingUI/nodes/TriggerNode';
 import useFlowStore from '../../../../../src/pages/VisProgPage/visualProgrammingUI/VisProgStores';
 import type { Node } from '@xyflow/react';
 import '@testing-library/jest-dom';
@@ -233,8 +238,8 @@ describe('TriggerNode', () => {
       };
 
       expect(() => {
-        TriggerConnects(node1, node2, true);
-        TriggerConnects(node1, node2, false);
+        TriggerConnectionSource(node1, node2.id);
+        TriggerConnectionTarget(node1, node2.id);
       }).not.toThrow();
     });
 

test/pages/visProgPage/visualProgrammingUI/nodes/UniversalNodes.test.tsx

@@ -1,8 +1,8 @@
 import { describe, beforeEach } from '@jest/globals';
 import { screen } from '@testing-library/react';
-import { renderWithProviders } from '../.././/./../../test-utils/test-utils';
+import { renderWithProviders } from '../../../../test-utils/test-utils.tsx';
 import type { XYPosition } from '@xyflow/react';
-import { NodeTypes, NodeDefaults, NodeConnects, NodeReduces, NodesInPhase } from '../../../../../src/pages/VisProgPage/visualProgrammingUI/NodeRegistry';
+import { NodeTypes, NodeDefaults, NodeConnections, NodeReduces, NodesInPhase } from '../../../../../src/pages/VisProgPage/visualProgrammingUI/NodeRegistry';
 import '@testing-library/jest-dom'
 import { createElement } from 'react';
 import useFlowStore from '../../../../../src/pages/VisProgPage/visualProgrammingUI/VisProgStores';
@@ -87,8 +87,8 @@ describe('NormNode', () => {
       useFlowStore.setState({ nodes: [sourceNode, targetNode] });
 
       // Spy on the connect functions
-      const sourceConnectSpy = jest.spyOn(NodeConnects, nodeType as keyof typeof NodeConnects);
-      const targetConnectSpy = jest.spyOn(NodeConnects, 'end');
+      const sourceConnectSpy = jest.spyOn(NodeConnections.Sources, nodeType as keyof typeof NodeConnections.Sources);
+      const targetConnectSpy = jest.spyOn(NodeConnections.Targets, 'end');
 
       // Simulate connection
       useFlowStore.getState().onConnect({
@@ -99,8 +99,8 @@ describe('NormNode', () => {
       });
 
       // Verify the connect functions were called
-      expect(sourceConnectSpy).toHaveBeenCalledWith(sourceNode, targetNode, true);
-      expect(targetConnectSpy).toHaveBeenCalledWith(targetNode, sourceNode, false);
+      expect(sourceConnectSpy).toHaveBeenCalledWith(sourceNode, targetNode.id);
+      expect(targetConnectSpy).toHaveBeenCalledWith(targetNode, sourceNode.id);
 
       sourceConnectSpy.mockRestore();
       targetConnectSpy.mockRestore();
@@ -130,7 +130,7 @@ describe('NormNode', () => {
       expect(phaseReduceSpy).toHaveBeenCalledWith(phaseNode, [phaseNode, testNode]);
       // Check if this node type is in NodesInPhase and returns false
       const nodesInPhaseFunc = NodesInPhase[nodeType as keyof typeof NodesInPhase];
-      if (nodesInPhaseFunc && nodesInPhaseFunc() === false && nodeType !== 'phase') {
+      if (nodesInPhaseFunc && !nodesInPhaseFunc() && nodeType !== 'phase') {
         // Node is NOT in phase, so it should NOT be called
         expect(nodeReduceSpy).not.toHaveBeenCalled();
       } else {