/
database.go
78 lines (67 loc) · 1.96 KB
/
database.go
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// Package database handles connections to the database.
package database
import (
"context"
"fmt"
"strings"
"github.com/airforce270/airbot/database/models"
"gorm.io/driver/postgres"
"gorm.io/gorm"
)
// Connect creates a connection to the database.
func Connect(ctx context.Context, dbName, user, password string) (*gorm.DB, error) {
settings := map[string]string{
"host": "database",
"dbname": dbName,
"user": user,
"password": password,
"port": "5432",
"sslmode": "disable",
"TimeZone": "UTC",
}
dsn := formatDSN(settings)
gormDB, err := gorm.Open(postgres.Open(dsn))
if err != nil {
return nil, fmt.Errorf("failed to open DB connection: %w", err)
}
gormDB.WithContext(ctx)
db, err := gormDB.DB()
if err != nil {
return nil, fmt.Errorf("failed to get sql.DB handle: %w", err)
}
db.SetMaxOpenConns(100)
return gormDB, nil
}
// Migrate performs GORM auto-migrations for all data models.
func Migrate(db *gorm.DB) error {
for _, model := range models.AllModels {
if err := db.AutoMigrate(&model); err != nil {
return fmt.Errorf("failed to migrate %+v: %w", model, err)
}
}
return nil
}
func LeaveChannel(db *gorm.DB, platformName, channel string) error {
var channels []models.JoinedChannel
err := db.Where(models.JoinedChannel{Platform: platformName, Channel: strings.ToLower(channel)}).Find(&channels).Error
if err != nil {
return fmt.Errorf("failed to leave %s/%s: %w", platformName, channel, err)
}
if len(channels) == 0 {
return fmt.Errorf("bot is not in channel %s", channel)
}
for _, c := range channels {
if err := db.Delete(&c).Error; err != nil {
return fmt.Errorf("failed to delete channel %s: %w", c.Channel, err)
}
}
return nil
}
// formatDSN formats settings into a DSN for a Postgres GORM connection.
func formatDSN(settings map[string]string) string {
parts := make([]string, len(settings))
for key, value := range settings {
parts = append(parts, key+"="+value)
}
return strings.Join(parts, " ")
}