Function buildMessageMaps

src/renderer/src/services/messagesService.ts:12–31

(messages: ChatMessage[])

}

function buildMessageMaps(messages: ChatMessage[]): MessageMaps {
  const messageMap = new Map<string, ChatMessage>()
  const childrenMap = new Map<string | undefined, ChatMessage[]>()

  for (const msg of messages) {
    messageMap.set(msg.id, msg)
    const parentId = msg.parentMessageId
    if (!childrenMap.has(parentId)) {
      childrenMap.set(parentId, [])
    }
    childrenMap.get(parentId)!.push(msg)
  }

  // 对每个 children 数组按 branchIndex 排序
  for (const children of childrenMap.values()) {
    children.sort((a, b) => (a.branchIndex ?? 0) - (b.branchIndex ?? 0))
  }

  return { messageMap, childrenMap }
}

// ==================== 消息 CRUD ====================