Initial commit

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

common/deduction.go

@@ -0,0 +1,26 @@
+package common
+
+import "math/rand"
+
+// CanDeductByProbability 扣量指标的未完成度和今日时间进度递增 能扣量的概率递增 [0,100]
+func CanDeductByProbability(probability float64) bool {
+	if probability <= 0 {
+		return false
+	}
+	if probability == 0 {
+		return false
+	}
+	if probability >= 1 {
+		return true //绝对扣量
+	}
+	canDeduct := probability > rand.Float64() //根据 probability 概率决定是否扣量
+	return canDeduct
+}
+
+// ConDeductionRatio 格式:%
+func ConsumeDeductionRatio(optDividendRatio, dividendRatio float64) float64 {
+	if optDividendRatio == 0 {
+		return dividendRatio
+	}
+	return (1 - dividendRatio/optDividendRatio)
+}