func login()

in go-gin-react/go-gin-react-part2/main.go [106:132]

• 18 lines of code
• 4 McCabe index (conditional complexity)

func login(c *gin.Context, db *sql.DB) {
	// Parse JSON request body into User struct
	var user User
	if err := c.ShouldBindJSON(&user); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	// Query database for user
	row := db.QueryRow("SELECT id FROM users WHERE username = ? AND password = ?", user.Username, user.Password)

	// Get ID of user
	var id int
	err := row.Scan(&id)
	if err != nil {
		// Check if user was not found
		if err == sql.ErrNoRows {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "invalid username or password"})
			return
		}
		// Return error if other error occurred
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
	}

	// Return ID of user
	c.JSON(http.StatusOK, gin.H{"id": id})
}