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database.go
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database.go
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package database
import (
"errors"
"github.com/umitanilkilic/advanced-url-shortener/config"
"github.com/umitanilkilic/advanced-url-shortener/model"
"gorm.io/driver/postgres"
"gorm.io/gorm"
)
var DB *gorm.DB
func SetupDatabaseConnection() error {
var err error
connStr := (*config.Config)["DATABASE_URL"]
DB, err = gorm.Open(postgres.Open(connStr))
if err != nil {
return errors.New("failed to connect database")
}
err = ExecuteDatabaseMigrations()
if err != nil {
return errors.New("failed to execute database migrations")
}
return nil
}
func ExecuteDatabaseMigrations() error {
return DB.AutoMigrate(&model.User{}, &model.ShortURL{}, &model.UrlStats{})
}
func RetrieveLongUrl(shortUrlID string) (model.ShortURL, error) {
var url model.ShortURL
result := DB.Where("url_id = ?", shortUrlID).First(&url)
if result.Error != nil {
return model.ShortURL{}, result.Error
}
return url, nil
}
func SaveMapping(urlStruct *model.ShortURL) error {
result := DB.Create(urlStruct)
if result.Error != nil {
return result.Error
}
return nil
}