init: hgmj server initial commit

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/service/searcher/opt.go

@@ -0,0 +1,57 @@
+package searcher
+
+// Opter Opter
+type Opter interface {
+	SetSkip(v int64) Opter
+	Skip() int64
+	SetLimit(v int64) Opter
+	Limit() int64
+	SetSort(key string, v int64) Opter
+	Sort() D
+}
+
+type Option struct {
+	skip  *int64
+	limit *int64
+	sort  D
+}
+
+const MaxLimit = 50
+
+const MinLimit = 1
+
+func (o *Option) Skip() int64 {
+	if o.skip == nil {
+		return 0
+	}
+	return *o.skip
+}
+
+func (o *Option) SetSkip(v int64) Opter {
+	o.skip = &v
+	return o
+}
+
+func (o *Option) Limit() int64 {
+	if o.limit == nil {
+		return MinLimit
+	}
+	if *o.limit > MaxLimit {
+		return MaxLimit
+	}
+	return *o.limit
+}
+
+func (o *Option) SetLimit(v int64) Opter {
+	o.limit = &v
+	return o
+}
+
+func (o *Option) Sort() D {
+	return o.sort
+}
+
+func (o *Option) SetSort(key string, v int64) Opter {
+	o.sort = append(o.sort, E{Key: key, Value: v})
+	return o
+}