优化表结构，重构模型，重新实现基于白银网关的提取节点流程

pkg/u/u.go

@@ -5,11 +5,36 @@ import (
 	"time"
 )
 
-// P 是一个工具函数，用于在表达式内原地创建一个指针
+// ====================
+// 逻辑
+// ====================
+
+func Else[T any](v *T, or T) T {
+	if v == nil {
+		return or
+	} else {
+		return *v
+	}
+}
+
+func ElseTo[A any, B any](a *A, f func(A) B) *B {
+	if a == nil {
+		return nil
+	} else {
+		return P(f(*a))
+	}
+}
+
+// ====================
+// 指针
+// ====================
+
+// P 原地创建值的指针
 func P[T any](v T) *T {
 	return &v
 }
 
+// Z 转换值为不可空，如果值为 nil，则返回其零值
 func Z[T any](v *T) T {
 	if v == nil {
 		var zero T
@@ -18,6 +43,7 @@ func Z[T any](v *T) T {
 	return *v
 }
 
+// X 转换值为可空，如果值为零值，则返回 nil
 func X[T comparable](v T) *T {
 	var zero T
 	if v == zero {
@@ -26,28 +52,50 @@ func X[T comparable](v T) *T {
 	return &v
 }
 
-func Today() time.Time {
-	var now = time.Now()
-	return time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
-}
+// ====================
+// 数组
+// ====================
 
-func Date(date time.Time) time.Time {
-	return time.Date(date.Year(), date.Month(), date.Day(), 0, 0, 0, 0, date.Location())
-}
-
-func SameDate(date time.Time) bool {
-	var now = time.Now()
-	return date.Year() == now.Year() && date.Month() == now.Month() && date.Day() == now.Day()
-}
-
-func Or[T any](v *T, or T) T {
-	if v == nil {
-		return or
-	} else {
-		return *v
+func Map[T any, R any](src []T, convert func(T) R) []R {
+	dst := make([]R, len(src))
+	for i, item := range src {
+		dst[i] = convert(item)
 	}
+	return dst
 }
 
+// ====================
+// 时间
+// ====================
+
+func DateHead(date time.Time) time.Time {
+	var y, m, d = date.Date()
+	return time.Date(y, m, d, 0, 0, 0, 0, date.Location())
+}
+
+func DateFoot(date time.Time) time.Time {
+	var y, m, d = date.Date()
+	return time.Date(y, m, d, 23, 59, 59, 999999999, date.Location())
+}
+
+func Today() time.Time {
+	return DateHead(time.Now())
+}
+
+func IsSameDate(date1, date2 time.Time) bool {
+	var y1, m1, d1 = date1.Date()
+	var y2, m2, d2 = date2.Date()
+	return y1 == y2 && m1 == m2 && d1 == d2
+}
+
+func IsToday(date time.Time) bool {
+	return IsSameDate(date, time.Now())
+}
+
+// ====================
+// 错误
+// ====================
+
 func CombineErrors(errs []error) error {
 	var combinedErr error = nil
 	for _, err := range errs {