Add oauth2 like auth service

Signed-off-by: Asai Neko <sugar@sne.moe>

service/auth/token.go

@@ -1,7 +1,52 @@
 package auth
 
-import "github.com/gin-gonic/gin"
+import (
+	"nixcn-cms/data"
+	"nixcn-cms/pkgs/authcode"
+	"nixcn-cms/pkgs/authtoken"
+
+	"github.com/gin-gonic/gin"
+	"github.com/spf13/viper"
+)
+
+type TokenRequest struct {
+	Code string `json:"code"`
+}
 
 func Token(c *gin.Context) {
+	var req TokenRequest
 
+	err := c.ShouldBindJSON(&req)
+	if err != nil {
+		c.JSON(400, gin.H{"status": "invalid request"})
+		return
+	}
+
+	email, ok := authcode.VerifyAuthCode(req.Code)
+	if !ok {
+		c.JSON(403, gin.H{"status": "invalid or expired token"})
+		return
+	}
+
+	userData := new(data.User)
+	user, err := userData.GetByEmail(email)
+	if err != nil {
+		c.JSON(500, gin.H{"status": "internal server error"})
+		return
+	}
+
+	// Generate jwt
+	JwtTool := authtoken.Token{
+		Application: viper.GetString("server.application"),
+	}
+	accessToken, refreshToken, err := JwtTool.IssueTokens(user.UserId)
+	if err != nil {
+		c.JSON(500, gin.H{"status": "error generating tokens"})
+		return
+	}
+
+	c.JSON(200, gin.H{
+		"access_token":  accessToken,
+		"refresh_token": refreshToken,
+	})
 }