获取小组等级级分数

epmet-module/resi-group/resi-group-server/src/main/java/com/epmet/modules/support/GroupLevelUtils.java

@@ -1,12 +1,22 @@
 package com.epmet.modules.support;
 
+import com.epmet.commons.tools.constant.NumConstant;
+import com.epmet.commons.tools.exception.EpmetErrorCode;
+import com.epmet.commons.tools.exception.RenException;
+import lombok.extern.slf4j.Slf4j;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+
 /**
  * 小组等级积分工具类
  *
  * @author zhaoqifeng
  * @date 2021/4/21 10:22
  */
+@Slf4j
 public class GroupLevelUtils {
+
     /**
      * 根据等级算出升级所需的积分
      *
@@ -14,9 +24,14 @@ public class GroupLevelUtils {
      * @return java.lang.Integer
      * @author zhaoqifeng
      * @date 2021/4/21 10:25
+     * @remark 通项公式：an=n(n-1)/2+2n-2(n∈N+)  -3+n(n-1)/2（需要特殊处理，所以引用前面的）
      */
     public static Integer getPoint(Integer level) {
-		Integer point = 0;
+        if (level == null || level < NumConstant.ONE) {
+            throw new RenException(EpmetErrorCode.INTERNAL_VALIDATE_ERROR.getCode());
+        }
+        Integer point = (level * (level - NumConstant.ONE) / NumConstant.TWO + NumConstant.TWO * level - NumConstant.TWO) * NumConstant.ONE_HUNDRED;
+        log.info("getPoint level:{},point:{}", level, point);
         return point;
     }
 
@@ -29,7 +44,33 @@ public class GroupLevelUtils {
      * @date 2021/4/21 10:25
      */
     public static Integer getLevel(Integer point) {
-		Integer level = 0;
-		return level;
+        if (point == null || point < NumConstant.ZERO) {
+            throw new RenException(EpmetErrorCode.INTERNAL_VALIDATE_ERROR.getCode());
+        }
+        //如果是0 则返回等级1
+        if (point == NumConstant.ZERO) {
+            return NumConstant.ONE;
+        }
+        AtomicBoolean flag = new AtomicBoolean(false);
+        AtomicInteger initLevel = new AtomicInteger(1);
+        do {
+            Integer point1 = getPoint(initLevel.incrementAndGet());
+            if (point < point1) {
+                int i = initLevel.decrementAndGet();
+                log.info("getLevel level:{},point:{}", i, point);
+                return i;
+            }
+
+        } while (!flag.get());
+        return null;
+    }
+
+    public static void main(String[] args) {
+        for (int i = 1; i < 10; i++) {
+            System.out.println("lv" + i + ":" + getPoint(i));
+        }
+        System.out.println(getLevel(3300));
+        System.out.println(getLevel(299));
+
     }
 }