<template>
  <div class="alert">
    <div class="alert-main" v-for="item in notices" :key="item.name">
      <div class="alert-content">{{item.content}}</div>
    </div>
  </div>
</template>

<script>
let seed = 0
function getUuid () {
  return 'alert_' + (seed++)
}
export default {
  name: 'IAlert',
  data () {
    return {
      notices: [],
    }
  },
  methods: {
    add (notice) {
      const name = getUuid()
      let _notice = Object.assign({ name }, notice)
      this.notices.push(_notice)
      const duration = notice.duration
      setTimeout(() => {
        this.remove(name)
      }, duration )
      return name
    },
    remove (name) {
      const notices = this.notices
      for (let i = 0; i < notices.length; i++) {
        if (notices[i].name === name) {
          this.notices.splice(i, 1)
          break
        }
      }
    }
  }
}
</script>

<style lang="scss" scoped>
  .alert {
    position: fixed;
    width: 100%;
    top: 16px;
    left: 0;
    text-align: center;
    pointer-events: none;
  }
  .alert-content {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 8px 16px;
    box-shadow: 0 1px 6px rgba(0, 0, 0, .2);
    margin-bottom: 8px;
  }
</style>
