Add adduser CLI command for creating users from the command line

main.go

@@ -8,6 +8,8 @@ import (
 	"net/http"
 	"os"
 
+	"golang.org/x/crypto/bcrypt"
+
 	"podstalk/handler"
 	"podstalk/store"
 )
@@ -19,6 +21,11 @@ var templateFS embed.FS
 var staticFS embed.FS
 
 func main() {
+	if len(os.Args) > 1 && os.Args[1] == "adduser" {
+		runAddUser()
+		return
+	}
+
 	dbPath := os.Getenv("PODSTALK_DB")
 	if dbPath == "" {
 		dbPath = "podstalk.db"
@@ -93,6 +100,38 @@ func main() {
 	log.Fatal(http.ListenAndServe(addr, nil))
 }
 
+func runAddUser() {
+	if len(os.Args) != 4 {
+		log.Fatalf("Usage: podstalk adduser <email> <password>")
+	}
+
+	email := os.Args[2]
+	password := os.Args[3]
+
+	dbPath := os.Getenv("PODSTALK_DB")
+	if dbPath == "" {
+		dbPath = "podstalk.db"
+	}
+
+	st, err := store.New(dbPath)
+	if err != nil {
+		log.Fatalf("failed to open database: %v", err)
+	}
+	defer st.Close()
+
+	hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	if err != nil {
+		log.Fatalf("failed to hash password: %v", err)
+	}
+
+	userID, err := st.CreateUser(email, string(hash))
+	if err != nil {
+		log.Fatalf("failed to create user: %v", err)
+	}
+
+	log.Printf("User created (id=%d)", userID)
+}
+
 func envOrDefault(key, def string) string {
 	if v := os.Getenv(key); v != "" {
 		return v