Add mysql support

internal/config/config.go

@@ -15,6 +15,13 @@ type config struct {
 	JwtSecret   string
 	JwtIssuer   string
 	JwtAudience string
+
+	DBEngine   string
+	DBHost     string
+	DBPort     string
+	DBUser     string
+	DBPassword string
+	DBName     string
 }
 
 var Config *config
@@ -58,6 +65,23 @@ func Load() *config {
 		audience = "CatsOfMastodonBotGo"
 	}
 
+
+	dbEngine := os.Getenv("CAOM_DB_ENGINE")
+	dbHost := os.Getenv("CAOM_DB_HOST")
+	dbPort := os.Getenv("CAOM_DB_PORT")
+	dbUser := os.Getenv("CAOM_DB_USER")
+	dbPassword := os.Getenv("CAOM_DB_PASSWORD")
+	dbName := os.Getenv("CAOM_DB_NAME")
+
+	if dbEngine == "" || dbHost == "" || dbPort == "" || dbUser == "" || dbPassword == "" || dbName == "" {
+		slog.Info("No database connection provided, using sqlite")
+		dbEngine = "sqlite"
+		dbHost = ""
+		dbPort = ""
+		dbUser = ""
+		dbPassword = ""
+		dbName = "caom.db"
+	}
 	// Inititlize AppContext
 	var appContext = &config{
 		AdminPassword: adminPassword,
@@ -67,6 +91,13 @@ func Load() *config {
 		JwtSecret:   secret,
 		JwtIssuer:   issuer,
 		JwtAudience: audience,
+
+		DBEngine:   dbEngine,
+		DBHost:     dbHost,
+		DBPort:     dbPort,
+		DBUser:     dbUser,
+		DBPassword: dbPassword,
+		DBName:     dbName,
 	}
 	return appContext
 

internal/database/database.go

@@ -1,9 +1,12 @@
 package database
 
 import (
+	"CatsOfMastodonBotGo/internal/config"
 	"CatsOfMastodonBotGo/internal/domain"
+	"fmt"
 	"os"
 
+	"gorm.io/driver/mysql"
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
 )
@@ -11,17 +14,34 @@ import (
 var Gorm *gorm.DB
 
 func Connect() (*gorm.DB, error) {
-	_, err := os.ReadDir("data")
-	if err != nil {
-		err := os.Mkdir("data", 0755)
+	var db *gorm.DB
+	var err error = nil
+
+	if config.Config.DBEngine == "sqlite" {
+		_, err = os.ReadDir("data")
+		if err != nil {
+			err = os.Mkdir("data", 0755)
+			if err != nil {
+				return nil, err
+			}
+		}
+		db, err = gorm.Open(sqlite.Open("data/caom.db"), &gorm.Config{})
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		dsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8mb4&parseTime=True&loc=Local",
+			config.Config.DBUser,
+			config.Config.DBPassword,
+			config.Config.DBHost,
+			config.Config.DBPort,
+			config.Config.DBName)
+		db, err = gorm.Open(mysql.Open(dsn), &gorm.Config{})
 		if err != nil {
 			return nil, err
 		}
 	}
-	db, err := gorm.Open(sqlite.Open("data/caom.db"), &gorm.Config{})
-	if err != nil {
-		return nil, err
-	}
+
 	// Migrate the schema
 	if err := db.AutoMigrate(&domain.Post{}, &domain.MediaAttachment{}, &domain.Account{}); err != nil {
 		return nil, err