142 lines
4.0 KiB
Go
142 lines
4.0 KiB
Go
package database
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import (
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"billit/internal/models"
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"context"
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"database/sql"
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"fmt"
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"log"
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"os"
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"strconv"
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"time"
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_ "github.com/mattn/go-sqlite3"
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)
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// Service represents the database service interface
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type Service interface {
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// Health returns database health status
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Health() map[string]string
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// Close closes the database connection
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Close() error
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// Buyer methods
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CreateBuyerDetails(userID string, name string, details string) (*models.BuyerDetails, error)
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UpdateBuyerDetails(id string, userID string, name string, details string) error
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GetBuyerDetails(id string, userID string) (*models.BuyerDetails, error)
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GetAllBuyerDetails(userID string) ([]models.BuyerDetails, error)
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DeleteBuyerDetails(id string, userID string) error
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// User methods
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CreateUser(email, passwordHash string) (*models.User, error)
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GetUserByEmail(email string) (*models.User, error)
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GetUserByID(id string) (*models.User, error)
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UpdateUserPassword(id string, passwordHash string) error
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UpdateUserDetails(id string, companyDetails string, bankDetails string, invoicePrefix string) error
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// Invoice methods
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GetNextInvoiceNumber(userID string) (string, error)
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CreateInvoice(id string, humanReadableID string, data interface{}, userID string) error
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GetInvoice(id string, userID string) (*models.Invoice, error)
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GetAllInvoices(userID string) ([]models.Invoice, error)
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GetRecentInvoices(userID string, limit int) ([]models.Invoice, error)
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// Product methods
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CreateProduct(p models.Product, userID string) error
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UpdateProduct(p models.Product, userID string) error
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GetAllProducts(userID string) ([]models.Product, error)
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GetProductBySKU(sku string, userID string) (*models.Product, error)
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DeleteProduct(sku string, userID string) error
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GetRecentProducts(userID string, limit int) ([]models.Product, error)
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}
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type service struct {
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db *sql.DB
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}
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var dbInstance *service
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// New creates a new database service
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func New() Service {
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// Reuse connection if already established
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if dbInstance != nil {
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return dbInstance
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}
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dbPath := os.Getenv("DB_PATH")
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if dbPath == "" {
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dbPath = "./db/dev.db"
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}
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db, err := sql.Open("sqlite3", dbPath)
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if err != nil {
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log.Fatal(err)
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}
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// Check connection
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if err := db.Ping(); err != nil {
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log.Fatal("Could not ping database:", err)
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}
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dbInstance = &service{
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db: db,
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}
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return dbInstance
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}
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// Health checks the health of the database connection
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func (s *service) Health() map[string]string {
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ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
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defer cancel()
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stats := make(map[string]string)
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// Ping the database
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err := s.db.PingContext(ctx)
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if err != nil {
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stats["status"] = "down"
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stats["error"] = fmt.Sprintf("db down: %v", err)
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log.Printf("db down: %v", err)
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return stats
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}
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// Database is up, add more statistics
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stats["status"] = "up"
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stats["message"] = "It's healthy"
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// Get database stats
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dbStats := s.db.Stats()
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stats["open_connections"] = strconv.Itoa(dbStats.OpenConnections)
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stats["in_use"] = strconv.Itoa(dbStats.InUse)
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stats["idle"] = strconv.Itoa(dbStats.Idle)
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stats["wait_count"] = strconv.FormatInt(dbStats.WaitCount, 10)
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stats["wait_duration"] = dbStats.WaitDuration.String()
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stats["max_idle_closed"] = strconv.FormatInt(dbStats.MaxIdleClosed, 10)
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stats["max_lifetime_closed"] = strconv.FormatInt(dbStats.MaxLifetimeClosed, 10)
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if dbStats.OpenConnections > 40 {
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stats["message"] = "The database is experiencing heavy load."
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}
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if dbStats.WaitCount > 1000 {
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stats["message"] = "The database has a high number of wait events, indicating potential bottlenecks."
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}
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if dbStats.MaxIdleClosed > int64(dbStats.OpenConnections)/2 {
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stats["message"] = "Many idle connections are being closed, consider revising the connection pool settings."
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}
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if dbStats.MaxLifetimeClosed > int64(dbStats.OpenConnections)/2 {
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stats["message"] = "Many connections are being closed due to max lifetime, consider increasing max lifetime or revising connection usage."
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}
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return stats
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}
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// Close closes the database connection
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func (s *service) Close() error {
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return s.db.Close()
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}
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