SQL/Orm CheckSumRepository complete

persistence/db_sql/checksum_repository.go

@@ -0,0 +1,71 @@
+package db_sql
+
+import (
+	"encoding/json"
+
+	"github.com/astaxie/beego/orm"
+	"github.com/cloudsonic/sonic-server/log"
+	"github.com/cloudsonic/sonic-server/scanner"
+)
+
+type checkSumRepository struct {
+	data map[string]string
+}
+
+const checkSumId = "1"
+
+type CheckSums struct {
+	ID   string `orm:"pk;column(id)"`
+	Data string `orm:"type(text)"`
+}
+
+func NewCheckSumRepository() scanner.CheckSumRepository {
+	r := &checkSumRepository{}
+	return r
+}
+
+func (r *checkSumRepository) loadData() error {
+	loadedData := make(map[string]string)
+	r.data = loadedData
+
+	cks := CheckSums{ID: checkSumId}
+	err := Db().Read(&cks)
+	if err == orm.ErrNoRows {
+		_, err = Db().Insert(&cks)
+		return err
+	}
+	if err != nil {
+		return err
+	}
+	_ = json.Unmarshal([]byte(cks.Data), &loadedData)
+	log.Debug("Loaded checksums", "total", len(loadedData))
+	return err
+}
+
+func (r *checkSumRepository) Get(id string) (string, error) {
+	if r.data == nil {
+		err := r.loadData()
+		if err != nil {
+			return "", err
+		}
+	}
+	return r.data[id], nil
+}
+
+func (r *checkSumRepository) SetData(newSums map[string]string) error {
+	data, _ := json.Marshal(&newSums)
+	cks := CheckSums{ID: checkSumId, Data: string(data)}
+	var err error
+	if Db().QueryTable(&CheckSums{}).Filter("id", checkSumId).Exist() {
+		_, err = Db().Update(&cks)
+	} else {
+		_, err = Db().Insert(&cks)
+	}
+	if err != nil {
+		return err
+	}
+	r.data = newSums
+	return nil
+}
+
+var _ scanner.CheckSumRepository = (*checkSumRepository)(nil)