export const $view = {
  props: {
    view: {
      type: String,
      default: null
    }
  },
  computed: {
    hasView() {
      return (views) => {
        if (views == null || views.length === 0) {
          return false;
        }
        let list = views;
        if (views instanceof String) {
          list = views.split(',');
        }
        return list != null && list.includes(this.view);
      }
    },
    notHasView() {
      return (views) => {
        return !this.hasView(views);
      }
    }
  }
}


/**
 * 显隐列
 **/
export const $showColumns = {
  data() {
    return {
      columns: []
    }
  },
  computed: {
    showColumns() {
      if (this.columns == null) {
        return [];
      }
      return this.columns.filter(item => item.visible);
    },
    isShow() {
      return (key) => {
        if (this.columns == null) {
          return false;
        }
        let column = this.columns.find(item => item.key === key);
        return column != null && column.visible;
      }
    }
  },
}