mv /ana, /ledger to /src/

src/ledger/like.go

@@ -0,0 +1,49 @@
+package ledger
+
+import (
+	"regexp"
+)
+
+type Like func(Delta) bool
+
+type Likes []Like
+
+func LikeBefore(date string) Like {
+	return func(d Delta) bool {
+		return date >= d.Date
+	}
+}
+
+func LikeAfter(date string) Like {
+	return func(d Delta) bool {
+		return date <= d.Date
+	}
+}
+
+func LikeName(pattern string) Like {
+	return func(d Delta) bool {
+		return like(pattern, d.Name)
+	}
+}
+
+func like(pattern string, other string) bool {
+	return regexp.MustCompile(pattern).MatchString(other)
+}
+
+func (likes Likes) Any(delta Delta) bool {
+	for i := range likes {
+		if likes[i](delta) {
+			return true
+		}
+	}
+	return false
+}
+
+func (likes Likes) All(delta Delta) bool {
+	for i := range likes {
+		if !likes[i](delta) {
+			return false
+		}
+	}
+	return true
+}