fix: Workflow adding nodes sometimes fails to connect correctly to anchor points

[shaohuzhang1]

fix: Workflow adding nodes sometimes fails to connect correctly to anchor points

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[shaohuzhang1]

The provided code snippet is for a JavaScript/TypeScript function clickNodes that sets up an event handler to handle clicks on nodes within a graph or diagram. Specifically, it appears to be related to connecting two nodes with an edge.

Here are some potential issues and suggestions:

1. Duplicate Target Node IDs:

   targetNodeId: nodeModel.id + '_left';

   If nodeModel.id ends with _left, adding .value?._id from the anchorData before this line would prevent errors if anchorData might not exist. However, without additional context, this could lead to unexpected behavior if there's no default value for anchorData.

2. Event Handling:
   The code doesn’t specifically mention how the clickNodes function was triggered (e.g., via an event listener). Ensure that this function is correctly hooked up in your application to manage clicking events on nodes.

3. Function Body:
   There is only one action (createConnection) being performed inside the clickNodes function. This should either call multiple functions sequentially or group them appropriately. Consider whether there’s redundancy in actions being repeated multiple times.

4. Node Model ID Concatenation with "_left":
   It's important to verify that concatenating strings like ${props.nodeModel.id}_left aligns with the data format expected throughout your application. Ensure consistency in naming conventions and data manipulation logic.

Suggested improvement ideas:

• Use type checking to ensure all required properties (sourceNodeId, targetNodeId) exist and have valid values.
• Add comments or documentation explaining the purpose and flow of the clickNodes function.
• Simplify complex expressions by breaking them into smaller, more readable parts. For example,

  const sourceAnchor = anchorData && anchorData.value ? { id: anchorData.value.id, } : null;
  createConnection({
    sourceNodeId: props.nodeModel.id,
    sourceAnchorId: sourceAnchor && sourceAnchor.id,
    targetNodeId: nodeModel.id,
    targetAnchorId: nodeModel.id + '_left',
  });

These checks and improvements can help ensure the function behaves as intended across different contexts and provides clearer code structure.