package nvcs
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import (
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"container/list"
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"fmt"
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"time"
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"gat1400Exchange/config"
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"gat1400Exchange/models"
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"gat1400Exchange/pkg/logger"
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)
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type simpleCache struct {
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data *list.List
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expiration time.Duration
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}
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func newCache(expiration time.Duration) *simpleCache {
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return &simpleCache{
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data: list.New(),
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expiration: expiration,
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}
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}
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// 存储数据到缓存中
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func (c *simpleCache) store(data elevatorRunData) {
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if config.RFIDConf.ReadFloor && gRFIDFloor != data.Floor {
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if data.RunState == RunStop {
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logger.Warn("A floor error has occurred rfid epc %s, nvcs floor %s", gRFIDFloor, data.Floor)
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}
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data.Floor = gRFIDFloor
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}
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lastData := c.data.Back()
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// 如果楼层相同，并且数据在1秒内，则忽略
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if lastData != nil && lastData.Value.(elevatorRunData).Timestamp == data.Timestamp {
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if lastData.Value.(elevatorRunData).Floor == data.Floor {
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return
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}
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}
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// 数据库保存一份
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go func() {
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var d = models.Positions{
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DeviceId: data.Device,
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Pos: data.Floor,
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RunDir: data.RunState,
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CreateTime: time.Now().Unix(),
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TimeString: time.Now().Format("2006-01-02 15:04:05"),
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}
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err := d.Save()
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if err != nil {
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logger.Warn("Device position update error:%s", err.Error())
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}
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}()
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// 写OSD
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var runStateStr string
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if config.NVCSConf.RunState {
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if data.RunState == RunUp {
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runStateStr = "上"
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} else if data.RunState == RunDown {
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runStateStr = "下"
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}
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}
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// 设置osd 格式 "1F上 固 枪"
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if config.NVCSConf.OSD != "" {
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floorText := fmt.Sprintf("%s%s %s", data.Floor, runStateStr, config.NVCSConf.OSD)
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// 调用hik api 将文字添加到osd的左下角
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go addFloorToOSD(floorText)
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}
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c.data.PushBack(data)
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}
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// 删除过期数据
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func (c *simpleCache) cleanExpired() {
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now := time.Now()
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// 从队列头部开始检查是否有过期数据
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for c.data.Len() > 0 {
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elem := c.data.Front() // 获取队列头部的元素
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item := elem.Value.(elevatorRunData)
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if now.Sub(time.Unix(item.Timestamp, 0)) > c.expiration {
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// 如果数据已经过期，则从队列中删除
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c.data.Remove(elem)
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} else {
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// 因为数据按时间顺序存储，遇到不过期的数据后就可以停止检查
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break
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}
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}
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}
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