refactor: update AS entry handling in API and database to support ASN-only entries. Remove prefix field from AS entry structure and adjust related functions and tests. Enhance OpenAPI specifications and documentation to reflect changes in AS entry representation.

internal/store/backend.go

@@ -109,19 +109,22 @@ type CDNSourcePatch struct {
 }
 
 type ASEntry struct {
-	ID           string
-	ModuleID     string
-	ASN          *int64
-	Prefix       *string
-	CommunityID  *string
+	ID          string
+	ModuleID    string
+	ASN         int64
+	CommunityID *string
 }
 
 type ASEntryPatch struct {
 	ASN         *int64
-	Prefix      *string
 	CommunityID *string
 }
 
+// ValidASN reports whether n is a usable BGP ASN (1..4294967295).
+func ValidASN(n int64) bool {
+	return n >= 1 && n <= 4294967295
+}
+
 type DomainEntry struct {
 	ID           string
 	ModuleID     string

internal/store/memory_crud.go

@@ -217,7 +217,7 @@ func (m *Memory) ListASEntries(tenantID, moduleID string) ([]*ASEntry, error) {
 }
 
 func (m *Memory) CreateASEntry(tenantID, moduleID string, in *ASEntry) (*ASEntry, error) {
-	if in == nil || (in.ASN == nil && (in.Prefix == nil || strings.TrimSpace(*in.Prefix) == "")) {
+	if in == nil || !ValidASN(in.ASN) {
 		return nil, ErrInvalidInput
 	}
 	m.mu.Lock()
@@ -230,7 +230,7 @@ func (m *Memory) CreateASEntry(tenantID, moduleID string, in *ASEntry) (*ASEntry
 		return nil, ErrInvalidInput
 	}
 	id := uuid.NewString()
-	e := &ASEntry{ID: id, ModuleID: moduleID, ASN: in.ASN, Prefix: in.Prefix, CommunityID: in.CommunityID}
+	e := &ASEntry{ID: id, ModuleID: moduleID, ASN: in.ASN, CommunityID: in.CommunityID}
 	m.asEntries[id] = e
 	return e, nil
 }
@@ -249,15 +249,7 @@ func (m *Memory) UpdateASEntry(tenantID, moduleID, entryID string, patch *ASEntr
 		return nil, ErrNotFound
 	}
 	if patch.ASN != nil {
-		e.ASN = patch.ASN
-	}
-	if patch.Prefix != nil {
-		p := strings.TrimSpace(*patch.Prefix)
-		if p == "" {
-			e.Prefix = nil
-		} else {
-			e.Prefix = &p
-		}
+		e.ASN = *patch.ASN
 	}
 	if patch.CommunityID != nil {
 		v := strings.TrimSpace(*patch.CommunityID)
@@ -267,6 +259,9 @@ func (m *Memory) UpdateASEntry(tenantID, moduleID, entryID string, patch *ASEntr
 			e.CommunityID = &v
 		}
 	}
+	if !ValidASN(e.ASN) {
+		return nil, ErrInvalidInput
+	}
 	return e, nil
 }