Initial commit: CarrotAssistant backend (Go + Gin + SQLite, OpenAI-compatible agent runtime)

internal/server/handlers_auth.go

@@ -0,0 +1,53 @@
+package server
+
+import (
+	"errors"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+
+	"code.littlelan.cn/CarrotAssistant/backend/internal/security"
+	"code.littlelan.cn/CarrotAssistant/backend/internal/store"
+)
+
+type loginReq struct {
+	Username string `json:"username" binding:"required"`
+	Password string `json:"password" binding:"required"`
+}
+
+// POST /admin/login — authenticates an admin and returns a JWT.
+func (d Deps) handleLogin(c *gin.Context) {
+	var req loginReq
+	if !bind(c, &req) {
+		return
+	}
+	var u store.AdminUser
+	err := d.DB.Where("username = ?", req.Username).First(&u).Error
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "用户名或密码错误"})
+		return
+	}
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "查询失败"})
+		return
+	}
+	if !security.VerifyPassword(u.PasswordHash, req.Password) {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "用户名或密码错误"})
+		return
+	}
+	token, err := d.issueToken(u.Username)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "签发令牌失败"})
+		return
+	}
+	d.auditBy(u.Username, nil, nil, "admin.login", nil)
+	c.JSON(http.StatusOK, gin.H{"token": token, "username": u.Username})
+}
+
+// GET /admin/me — returns the currently authenticated admin (for the SPA to
+// confirm a stored token is still valid after reload).
+func (d Deps) handleMe(c *gin.Context) {
+	u := adminCtx(c)
+	c.JSON(http.StatusOK, gin.H{"id": u.ID, "username": u.Username})
+}