import Vue from 'vue'

/**
 * 阅读论文标签数据
 */
export const state=()=>({
  //已打开论文列表
  read: { },
  //激活的论文标签
  activeName:''
})
export const mutations = {
  //新建论文标签
  open(state,item){
    if(item.title in state.read){
      mutations.choose(state,item.title)
    }else{
      Vue.set(state.read,item.title, item)
      mutations.choose(state)
    }
  },
  //关闭论文标签
  close(state,title){
    Vue.delete(state.read,title)
    if(Object.keys(state.read).length>0&&state.activeName===title){
        mutations.choose(state)
    }
  },
  //选择论文标签
  choose(state,title=Object.keys(state.read)[Object.keys(state.read).length-1]){
    state.activeName=title
  }
}