移除HTML中重复ID的连续span元素，保留单个并合并文本

处理一段HTML字符串时，需要实现以下操作：

• 选中所有<span>元素
• 移除连续排列的同ID重复<span>，仅保留一个
• 将所有被移除的同ID<span>内的文本合并到保留的那个<span>中
• 不得删除<span>元素之外的其他文本

示例 #

输入 #

<p>
  Hi,<span id="1">this is just a simple text and we</span>
  <span id="1">want to save me because i had a lot of</span>
  <span id="1">pressure on and i want to live a better life. 😭</span>
  I researched a lot about it but i could't find anything helpful
  <span id="2">just another rant. 😭</span>
</p>

输出 #

<p>
  Hi, 
  <span id="1">
      this is just a simple text and we want to save me because i had a lot of 
      pressure on and i want to live a better life 😭
  </span>
  I researched a lot about it but i could't find anything helpful
  <span id="2">just another rant. 😭</span>
</p>

内容的提问来源于stack exchange，提问作者Samyar