141 lines
3.3 KiB
Go
141 lines
3.3 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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gormDB.AutoMigrate(&Currency{})
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gormDB.AutoMigrate(&ExchangeRate{})
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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 checkSeededValues[T Identifiable](whatToCheck []*T, errorIfNotFound error, tx *gorm.DB) error {
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var valuesInDB []T
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if err := tx.Find(&valuesInDB).Error; err != nil {
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return err
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}
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if len(valuesInDB) == 0 {
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for _, v := range whatToCheck {
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if err := tx.Create(v).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 _, v := range whatToCheck {
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var tmp T
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if err := tx.Find(&tmp, v).Error; err != nil {
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return err
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}
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if tmp.GetID() == 0 {
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return errorIfNotFound
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}
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}
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return nil
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}
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func initMetrics(tx *gorm.DB) error {
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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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return checkSeededValues(metricsThatNeeded, CANT_FIND_METRIC, tx)
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}
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func initCurrencies(tx *gorm.DB) error {
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currsThatNeeded := []*Currency{
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{Name: "Dollar", Symbol: "$", ISOName: "USD"},
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{Name: "Moldavian Leu", Symbol: "L", ISOName: "MDL"},
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{Name: "Romanian Leu", Symbol: "L", ISOName: "RON"},
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{Name: "Polish Zloty", Symbol: "zł", ISOName: "PLN"},
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{Name: "Ukrainian Hryvnia", Symbol: "₴", ISOName: "UAH"},
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{Name: "Euro", Symbol: "€", ISOName: "EUR"},
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{Name: "Russian Ruble", Symbol: "₽", ISOName: "RUB"},
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{Name: "Kazakhstani Tenge", Symbol: "₸", ISOName: "KZT"},
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{Name: "Chinese Yuan", Symbol: "¥", ISOName: "CNY"},
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}
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return checkSeededValues(currsThatNeeded, CANT_FIND_METRIC, tx)
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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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if err := initCurrencies(tx); err != nil {
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return fmt.Errorf("initCurrencies: %w", err)
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}
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return nil
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}
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