tam chat

server/internal/auth/auth.go

@@ -0,0 +1,105 @@
+package auth
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"errors"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+	"golang.org/x/crypto/bcrypt"
+	"gorm.io/gorm"
+
+	"server/internal/models"
+)
+
+const staffCtxKey = "staffId"
+
+type StaffClaims struct {
+	StaffID uint   `json:"staffId"`
+	Email   string `json:"email"`
+	jwt.RegisteredClaims
+}
+
+func JWTSecret() string {
+	if s := os.Getenv("JWT_SECRET"); s != "" {
+		return s
+	}
+	return "simple-care-staff-jwt-change-me-in-production"
+}
+
+func HashPassword(password string) (string, error) {
+	b, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	return string(b), err
+}
+
+func CheckPassword(hash, password string) bool {
+	return bcrypt.CompareHashAndPassword([]byte(hash), []byte(password)) == nil
+}
+
+func RandomPassword(n int) string {
+	if n < 8 {
+		n = 8
+	}
+	b := make([]byte, n)
+	_, _ = rand.Read(b)
+	return hex.EncodeToString(b)[:n]
+}
+
+func RandomToken(n int) string {
+	b := make([]byte, n)
+	_, _ = rand.Read(b)
+	return hex.EncodeToString(b)
+}
+
+func IssueToken(staff *models.StaffAccount) (string, error) {
+	claims := StaffClaims{
+		StaffID: staff.ID,
+		Email:   staff.Email,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(7 * 24 * time.Hour)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+		},
+	}
+	t := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return t.SignedString([]byte(JWTSecret()))
+}
+
+func ParseToken(tokenStr string) (*StaffClaims, error) {
+	t, err := jwt.ParseWithClaims(tokenStr, &StaffClaims{}, func(t *jwt.Token) (any, error) {
+		return []byte(JWTSecret()), nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	claims, ok := t.Claims.(*StaffClaims)
+	if !ok || !t.Valid {
+		return nil, errors.New("invalid token")
+	}
+	return claims, nil
+}
+
+func EmailDomainPart(email string) string {
+	parts := strings.Split(strings.ToLower(strings.TrimSpace(email)), "@")
+	if len(parts) != 2 {
+		return ""
+	}
+	return parts[1]
+}
+
+func IsEmailDomainAllowed(db *gorm.DB, email string) bool {
+	domain := EmailDomainPart(email)
+	if domain == "" {
+		return false
+	}
+	var count int64
+	db.Model(&models.EmailDomain{}).Where("is_active = ?", true).Count(&count)
+	if count == 0 {
+		return true
+	}
+	var found int64
+	db.Model(&models.EmailDomain{}).Where("domain = ? AND is_active = ?", domain, true).Count(&found)
+	return found > 0
+}