Shopify Liquid 按天切换横幅自定义区块代码优化问询

核心优化点（无需修改现有后台配置，直接替换冗余逻辑即可） #

你原来的7分支case语句可以通过星期映射数组直接动态取值，仅需3行代码即可完成相同逻辑，大幅降低冗余：

{%- when 'simple' -%}
            {%- liquid
              assign block_img = ''
              assign block_text = ''
              if block.settings.link contains '/products/'
                assign product_handle = block.settings.link | remove: '/products/'
                assign block_img = all_products[product_handle].featured_media.preview_image
                assign block_text = all_products[product_handle].title
              elsif block.settings.link contains '/collections/'
                assign lang_code_string = request.locale.iso_code | prepend: '/'
                assign collection_handle = block.settings.link | remove: '/collections/' | remove: lang_code_string
                assign block_text = collections[collection_handle].title
                if collections[collection_handle].image
                  assign block_img = collections[collection_handle].image
                else
                  assign block_img = collections[collection_handle].products[0].featured_image
                endif
              endif
              if block.settings.text != ''
                assign block_text = block.settings.text
              endif
              # 优化后的星期判断逻辑开始
              assign checkday = false
              assign todaynumber = 'now' | date: '%u' | plus: 0
              # 数组索引0留空，1-7依次对应周一到周日的配置ID，和%u返回值完全匹配
              assign week_day_map = ",Lunes,Martes,Miercoles,Jueves,Viernes,Sabado,Domingo" | split: ","
              assign checkday = block.settings[week_day_map[todaynumber]]
              # 优化后的星期判断逻辑结束
              if block.settings.image
                if checkday
                    assign block_img = block.settings.imagepar
                else
                    assign block_img = block.settings.image
                endif
              endif
            -%}

后续扩展促销有效期的实现方案 #

如果要新增过期时间控制，仅需两步即可完成：

1. 在schema配置中新增日期选择项：

{
  "type": "date",
  "id": "promo_expire_date",
  "label": "促销过期时间",
  "info": "过期后将自动切回主图"
}

2. 在Liquid的图片判断逻辑中新增时间校验：

if block.settings.image
  assign now_ts = 'now' | date: '%s' | plus: 0
  assign expire_ts = block.settings.promo_expire_date | date: '%s' | plus: 0
  # 仅当当天符合星期规则且未过期时展示促销图
  if checkday and now_ts < expire_ts
      assign block_img = block.settings.imagepar
  else
      assign block_img = block.settings.image
  endif
endif

优化优势 #

• 完全兼容你已有的后台配置，不需要重新设置已添加的区块内容
• 后续调整星期配置仅需修改week_day_map数组即可，无需调整多分支判断逻辑
• 代码量减少60%以上，可读性和可维护性大幅提升

内容的提问来源于stack exchange，提问作者Zuil Happy