initial commit

models/user.go

@@ -0,0 +1,93 @@
+package models
+
+import (
+	"github.com/dgrijalva/jwt-go"
+	"github.com/labstack/echo"
+	"golang.org/x/crypto/bcrypt"
+)
+
+// UserLogin Object to recive user credentials in JSON format
+type UserLogin struct {
+	Username string `json:"username" form:"username"`
+	Password string `json:"password" form:"password"`
+}
+
+// User holds information about an user
+type User struct {
+	ID       int64  `xorm:"int(11) autoincr not null unique pk" json:"id"`
+	Name     string `xorm:"varchar(250)" json:"name"`
+	Username string `xorm:"varchar(250) not null unique" json:"username"`
+	Password string `xorm:"varchar(250) not null" json:"password"`
+	Email    string `xorm:"varchar(250)" json:"email"`
+	IsAdmin  bool   `xorm:"tinyint(1) not null" json:"isAdmin"`
+	Created  int64  `xorm:"created" json:"created"`
+	Updated  int64  `xorm:"updated" json:"updated"`
+}
+
+// TableName returns the table name for users
+func (User) TableName() string {
+	return "users"
+}
+
+// GetUserByID gets informations about a user by its ID
+func GetUserByID(id int64) (user User, exists bool, err error) {
+	// Apparently xorm does otherwise look for all users but return only one, which leads to returing one even if the ID is 0
+	if id == 0 {
+		return User{}, false, nil
+	}
+
+	return GetUser(User{ID: id})
+}
+
+// GetUser gets a user object
+func GetUser(user User) (userOut User, exists bool, err error) {
+	userOut = user
+	exists, err = x.Get(&userOut)
+
+	if !exists {
+		return User{}, false, ErrUserDoesNotExist{}
+	}
+
+	return userOut, exists, err
+}
+
+// CheckUserCredentials checks user credentials
+func CheckUserCredentials(u *UserLogin) (User, error) {
+
+	// Check if the user exists
+	user, exists, err := GetUser(User{Username: u.Username})
+	if err != nil {
+		return User{}, err
+	}
+
+	if !exists {
+		return User{}, ErrUserDoesNotExist{}
+	}
+
+	// Check the users password
+	err = bcrypt.CompareHashAndPassword([]byte(user.Password), []byte(u.Password))
+
+	if err != nil {
+		return User{}, err
+	}
+
+	return user, nil
+}
+
+// GetCurrentUser returns the current user based on its jwt token
+func GetCurrentUser(c echo.Context) (user User, err error) {
+	jwtinf := c.Get("user").(*jwt.Token)
+	claims := jwtinf.Claims.(jwt.MapClaims)
+	userID, ok := claims["id"].(float64)
+	if !ok {
+		return user, ErrCouldNotGetUserID{}
+	}
+	user = User{
+		ID:       int64(userID),
+		Name:     claims["name"].(string),
+		Email:    claims["email"].(string),
+		Username: claims["username"].(string),
+	}
+
+	return
+}