117 lines
2.4 KiB
Go
117 lines
2.4 KiB
Go
package db
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import (
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"errors"
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"fmt"
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"log"
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"os"
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"sync"
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"time"
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"gorm.io/driver/sqlite"
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"gorm.io/gorm"
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"gorm.io/gorm/logger"
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)
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var udb *gorm.DB
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var conMu sync.Mutex
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var (
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ERROR_DB_NOT_INIT = errors.New("Database connection is not initialized")
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)
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func Init() error {
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dbc := Connect()
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// Seeds
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if err := initStateOfDb(dbc); err != nil {
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return fmt.Errorf("initStateOfDb: %w", err)
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}
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return nil
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}
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func Connect() *gorm.DB {
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conMu.Lock()
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defer conMu.Unlock()
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if udb != nil {
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return udb
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}
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logFile, err := os.OpenFile("db.log", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
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if err != nil {
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panic(err)
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}
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newLogger := logger.New(
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log.New(logFile, "\r\n", log.LstdFlags),
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logger.Config{
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SlowThreshold: time.Second,
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LogLevel: logger.Error,
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IgnoreRecordNotFoundError: true,
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ParameterizedQueries: true,
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Colorful: false,
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},
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)
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gormDB, err := gorm.Open(sqlite.Open("gonuts.db"), &gorm.Config{
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Logger: newLogger,
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})
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if err != nil {
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log.Panic(err)
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}
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newUDB := gormDB
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gormDB.AutoMigrate(&Card{})
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gormDB.AutoMigrate(&Category{})
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gormDB.AutoMigrate(&Item{})
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gormDB.AutoMigrate(&ItemPrice{})
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gormDB.AutoMigrate(&Payment{})
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gormDB.AutoMigrate(&ItemBought{})
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gormDB.AutoMigrate(&Income{})
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gormDB.AutoMigrate(&Debt{})
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gormDB.AutoMigrate(&Transfer{})
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gormDB.AutoMigrate(&User{})
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gormDB.AutoMigrate(&Type{})
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gormDB.AutoMigrate(&Session{})
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gormDB.AutoMigrate(&Expense{})
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gormDB.AutoMigrate(&Metric{})
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return newUDB
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}
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var (
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CANT_FIND_METRIC = errors.New("Can't find proper metrics in database")
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)
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func initMetrics(tx *gorm.DB) error {
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var metrics []Metric
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if err := tx.Find(&metrics).Error; err != nil {
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return err
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}
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metricsThatNeeded := []*Metric{
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&Metric{Name: "None", Short: "pcs", Value: 0},
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&Metric{Name: "Gram", Short: "g", Value: 1},
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&Metric{Name: "Kilogram", Short: "kg", Value: 2},
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&Metric{Name: "Liter", Short: "l", Value: 3},
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}
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if len(metrics) == 0 {
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for _, m := range metricsThatNeeded {
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if err := tx.Create(m).Error; err != nil {
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return err
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}
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}
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return nil
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}
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for _, m := range metricsThatNeeded {
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tmp := &Metric{}
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if err := tx.Find(tmp, m).Error; err != nil {
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return err
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}
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if tmp.ID == 0 {
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return CANT_FIND_METRIC
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}
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}
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return nil
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}
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func initStateOfDb(tx *gorm.DB) error {
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if err := initMetrics(tx); err != nil {
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return fmt.Errorf("initMetrics: %w", err)
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}
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return nil
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}
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