Add structs and corresponding API routes

struct/user.go

@@ -0,0 +1,106 @@
+package ckh
+
+import (
+	"crypto"
+	_ "crypto/sha1"
+)
+
+type User struct {
+	Id       int64  `json:"id"`
+	Username string `json:"username"`
+	password []byte
+}
+
+func GetUsers() (users []User, err error) {
+	if rows, errr := DBQuery("SELECT id_user, username, password FROM users"); errr != nil {
+		return nil, errr
+	} else {
+		defer rows.Close()
+
+		users = make([]User, 0)
+		for rows.Next() {
+			var u User
+			if err = rows.Scan(&u.Id, &u.Username, &u.password); err != nil {
+				return
+			}
+			users = append(users, u)
+		}
+		if err = rows.Err(); err != nil {
+			return
+		}
+
+		return
+	}
+}
+
+func GetUser(id int64) (u User, err error) {
+	err = DBQueryRow("SELECT id_user, username, password FROM users WHERE id_user = ?", id).Scan(&u.Id, &u.Username, &u.password)
+	return
+}
+
+func hashPassword(password string) []byte {
+	hash := crypto.SHA1.New()
+	return hash.Sum([]byte(password))
+}
+
+func NewUser(username string, password string) (User, error) {
+	hash := hashPassword(password)
+
+	if res, err := DBExec("INSERT INTO users (username, password) VALUES (?, ?)", username, hash); err != nil {
+		return User{}, err
+	} else if uid, err := res.LastInsertId(); err != nil {
+		return User{}, err
+	} else {
+		return User{uid, username, hash}, nil
+	}
+}
+
+func (u User) checkPassword(password string) bool {
+	givenHash := hashPassword(password)
+
+	if len(givenHash) != len(u.password) {
+		return false
+	}
+
+	for k := range u.password {
+		if u.password[k] != givenHash[k] {
+			return false
+		}
+	}
+
+	return true
+}
+
+func (u User) ChangePassword(password string) {
+	u.password = hashPassword(password)
+}
+
+func (u User) Update() (int64, error) {
+	if res, err := DBExec("UPDATE users SET username = ?, password = ? WHERE id_user = ?", u.Username, u.password, u.Id); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}
+
+func (u User) Delete() (int64, error) {
+	if res, err := DBExec("DELETE FROM users WHERE id_user = ?", u.Id); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}
+
+func ClearUsers() (int64, error) {
+	if res, err := DBExec("DELETE FROM users"); err != nil {
+		return 0, err
+	} else if nb, err := res.RowsAffected(); err != nil {
+		return 0, err
+	} else {
+		return nb, err
+	}
+}