Function insertNestedItem

yaml-flow-editor/src/utils/flow-utils.ts:159–215

(
  currentData: any,
  pathParts: string[],
  targetIndex: number,
  newItem: FlowNodeData
)

// Insert item at specific path and index
export const insertNestedItem = (
  currentData: any,
  pathParts: string[],
  targetIndex: number,
  newItem: FlowNodeData
): any => {
  if (pathParts.length === 0 || currentData == null) return currentData;

  const [head, ...tail] = pathParts;
  
  if (!isNaN(Number(head)) && Array.isArray(currentData)) {
    const index = Number(head);
    const item = currentData[index];
    const updatedItem = insertNestedItem(item, tail, targetIndex, newItem);
    const newData = [...currentData];
    newData[index] = updatedItem;
    return newData;
  }
  
  let realKey = head;
  let isSwitchCase = false;
  
  if (head === 'then') realKey = 'thenSteps';
  else if (head === 'else') realKey = 'elseSteps';
  else if (head === 'loop') realKey = 'loopSteps';
  else if (head === '__default__') realKey = 'defaultSteps';
  else {
    if (currentData.cases && Array.isArray(currentData.cases[head])) {
      isSwitchCase = true;
    }
  }
  
  if (tail.length === 0) {
    if (isSwitchCase) {
      const newCases = { ...currentData.cases };
      const targetArray = [...(newCases[head] || [])];
      targetArray.splice(targetIndex, 0, newItem);
      newCases[head] = targetArray;
      return { ...currentData, cases: newCases };
    } else {
      const targetArray = [...(currentData[realKey] || [])];
      targetArray.splice(targetIndex, 0, newItem);
      return { ...currentData, [realKey]: targetArray };
    }
  }
  
  if (isSwitchCase) {
     const newCases = { ...currentData.cases };
     const array = newCases[head] || [];
     newCases[head] = insertNestedItem(array, tail, targetIndex, newItem);
     return { ...currentData, cases: newCases };
  } else {
     const array = currentData[realKey] || [];
     const newArray = insertNestedItem(array, tail, targetIndex, newItem);
     return { ...currentData, [realKey]: newArray };
  }
};