Add SQLite database storage backend

base/database/record/base.go

@@ -102,7 +102,7 @@ func (b *Base) SetMeta(meta *Meta) {
 	b.meta = meta
 }
 
-// Marshal marshals the object, without the database key or metadata. It returns nil if the record is deleted.
+// Marshal marshals the format and data.
 func (b *Base) Marshal(self Record, format uint8) ([]byte, error) {
 	if b.Meta() == nil {
 		return nil, errors.New("missing meta")
@@ -119,7 +119,20 @@ func (b *Base) Marshal(self Record, format uint8) ([]byte, error) {
 	return dumped, nil
 }
 
-// MarshalRecord packs the object, including metadata, into a byte array for saving in a database.
+// MarshalDataOnly marshals the data only.
+func (b *Base) MarshalDataOnly(self Record, format uint8) ([]byte, error) {
+	if b.Meta() == nil {
+		return nil, errors.New("missing meta")
+	}
+
+	if b.Meta().Deleted > 0 {
+		return nil, nil
+	}
+
+	return dsd.DumpWithoutIdentifier(self, format, "")
+}
+
+// MarshalRecord marshals the data, format and metadata.
 func (b *Base) MarshalRecord(self Record) ([]byte, error) {
 	if b.Meta() == nil {
 		return nil, errors.New("missing meta")

base/database/record/meta.go

@@ -49,11 +49,21 @@ func (m *Meta) MakeCrownJewel() {
 	m.cronjewel = true
 }
 
+// IsCrownJewel returns whether the database record is marked as a crownjewel.
+func (m *Meta) IsCrownJewel() bool {
+	return m.cronjewel
+}
+
 // MakeSecret sets the database record as secret, meaning that it may only be used internally, and not by interfacing processes, such as the UI.
 func (m *Meta) MakeSecret() {
 	m.secret = true
 }
 
+// IsSecret returns whether the database record is marked as a secret.
+func (m *Meta) IsSecret() bool {
+	return m.secret
+}
+
 // Update updates the internal meta states and should be called before writing the record to the database.
 func (m *Meta) Update() {
 	now := time.Now().Unix()

base/database/record/record.go

@@ -20,6 +20,7 @@ type Record interface {
 
 	// Serialization.
 	Marshal(self Record, format uint8) ([]byte, error)
+	MarshalDataOnly(self Record, format uint8) ([]byte, error)
 	MarshalRecord(self Record) ([]byte, error)
 	GetAccessor(self Record) accessor.Accessor
 

base/database/record/wrapper.go

@@ -79,7 +79,21 @@ func NewWrapper(key string, meta *Meta, format uint8, data []byte) (*Wrapper, er
 	}, nil
 }
 
-// Marshal marshals the object, without the database key or metadata.
+// NewWrapperFromDatabase returns a new record wrapper for the given data.
+func NewWrapperFromDatabase(dbName, dbKey string, meta *Meta, format uint8, data []byte) (*Wrapper, error) {
+	return &Wrapper{
+		Base{
+			dbName: dbName,
+			dbKey:  dbKey,
+			meta:   meta,
+		},
+		sync.Mutex{},
+		format,
+		data,
+	}, nil
+}
+
+// Marshal marshals the format and data.
 func (w *Wrapper) Marshal(r Record, format uint8) ([]byte, error) {
 	if w.Meta() == nil {
 		return nil, errors.New("missing meta")
@@ -100,7 +114,24 @@ func (w *Wrapper) Marshal(r Record, format uint8) ([]byte, error) {
 	return data, nil
 }
 
-// MarshalRecord packs the object, including metadata, into a byte array for saving in a database.
+// MarshalDataOnly marshals the data only.
+func (w *Wrapper) MarshalDataOnly(self Record, format uint8) ([]byte, error) {
+	if w.Meta() == nil {
+		return nil, errors.New("missing meta")
+	}
+
+	if w.Meta().Deleted > 0 {
+		return nil, nil
+	}
+
+	if format != dsd.AUTO && format != w.Format {
+		return nil, errors.New("could not dump model, wrapped object format mismatch")
+	}
+
+	return w.Data, nil
+}
+
+// MarshalRecord marshals the data, format and metadata.
 func (w *Wrapper) MarshalRecord(r Record) ([]byte, error) {
 	// Duplication necessary, as the version from Base would call Base.Marshal instead of Wrapper.Marshal