feat: added basic backend features to it

  - Set up API framework (Gin Gonic)
  - Set up ORM/DB library (GORM)
  - Design database schema (Users, Accounts, Transactions, Loans, Goals)
  - Set up database connection and migrations

1 files changed, 88 insertions, 0 deletions

diff --git a/backend/internal/router/router.go b/backend/internal/router/router.go
new file mode 100644
index 0000000..b82e1af
--- /dev/null
+++ b/backend/internal/router/router.go
@@ -0,0 +1,88 @@
+package router
+
+import (
+	"finance/backend/internal/api/auth"
+	"finance/backend/internal/api/v1/users"
+	"finance/backend/internal/config"
+	"finance/backend/internal/database"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+// SetupRouter configures the API routes
+func SetupRouter(cfg *config.Config) *gin.Engine {
+	r := gin.Default()
+
+	// Enable CORS
+	r.Use(func(c *gin.Context) {
+		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
+		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
+		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
+		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS, GET, PUT, DELETE")
+
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(204)
+			return
+		}
+
+		c.Next()
+	})
+
+	// Public utility endpoints
+	r.GET("/ping", func(c *gin.Context) {
+		c.JSON(http.StatusOK, gin.H{
+			"message": "pong",
+		})
+	})
+
+	// Add database status endpoint
+	r.GET("/db-status", func(c *gin.Context) {
+		// Try to get a connection from the pool
+		sqlDB, err := database.DB.DB()
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{
+				"status":  "error",
+				"message": "Failed to get database connection",
+				"error":   err.Error(),
+			})
+			return
+		}
+
+		// Check if database is reachable
+		err = sqlDB.Ping()
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{
+				"status":  "error",
+				"message": "Database is not reachable",
+				"error":   err.Error(),
+			})
+			return
+		}
+
+		c.JSON(http.StatusOK, gin.H{
+			"status":  "success",
+			"message": "Database connection is healthy",
+		})
+	})
+
+	// API v1 routes
+	v1 := r.Group("/api/v1")
+	{
+		// Auth routes (public)
+		v1.POST("/auth/signup", auth.Signup(cfg))
+		v1.POST("/auth/login", auth.Login(cfg))
+
+		// Protected routes
+		protected := v1.Group("")
+		protected.Use(auth.AuthMiddleware(cfg))
+		{
+			// User routes
+			protected.GET("/users/me", users.GetCurrentUser)
+
+			// Add other protected routes here
+		}
+	}
+
+	return r
+}