Rename statistic to statistics

src/main/kotlin/top/fatweb/api/cron/StatisticsCron.kt

@@ -0,0 +1,23 @@
+package top.fatweb.api.cron
+
+import org.springframework.scheduling.annotation.Scheduled
+import org.springframework.stereotype.Component
+import top.fatweb.api.entity.system.StatisticsLog
+import top.fatweb.api.properties.SecurityProperties
+import top.fatweb.api.service.system.IStatisticsLogService
+import top.fatweb.api.util.RedisUtil
+
+@Component
+class StatisticsCron(
+    private val redisUtil: RedisUtil,
+    private val statisticsLogService: IStatisticsLogService
+) {
+    @Scheduled(cron = "0 * * * * *")
+    fun onlineUserCount() {
+        statisticsLogService.save(StatisticsLog().apply {
+            key = StatisticsLog.KeyItem.ONLINE_USERS_COUNT
+            value = redisUtil.keys("${SecurityProperties.jwtIssuer}_login_*")
+                .distinctBy { Regex("FatWeb_login_(.*):.*").matchEntire(it)?.groupValues?.getOrNull(1) }.size.toString()
+        })
+    }
+}