69 lines
1.3 KiB
Go
69 lines
1.3 KiB
Go
package db
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import (
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serverdb "github.com/evcc-io/evcc/server/db"
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"github.com/evcc-io/evcc/util"
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"gorm.io/gorm"
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)
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// DB is a SQL database storage service
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type DB struct {
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log *util.Logger
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db *gorm.DB
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name string
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}
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type Database interface {
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Session(startEnergy float64) *Session
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Persist(session interface{})
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}
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// New creates a database storage driver
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func New(name string) (*DB, error) {
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db := serverdb.Instance
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// TODO deprecate
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var err error
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if table := "transactions"; db.Migrator().HasTable(table) {
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err = db.Migrator().RenameTable(table, new(Session))
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}
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if err == nil {
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err = db.AutoMigrate(new(Session))
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}
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sessiondb := &DB{
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log: util.NewLogger("db"),
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db: db,
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name: name,
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}
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return sessiondb, err
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}
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// Session creates a charging session
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func (s *DB) Session(meter float64) *Session {
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t := Session{
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Loadpoint: s.name,
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}
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if meter > 0 {
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t.MeterStart = &meter
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}
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return &t
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}
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// Persist creates or updates a transaction in the database
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func (s *DB) Persist(session interface{}) {
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if err := s.db.Save(session).Error; err != nil {
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s.log.ERROR.Printf("persist: %v", err)
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}
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}
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// Return sessions
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// TODO make this part of server/db
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func (s *DB) Sessions() (Sessions, error) {
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var res Sessions
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tx := s.db.Find(&res)
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return res, tx.Error
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}
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