PracowniaProgramowania/backend/connector_mysql.go

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package main
import (
"database/sql"
"fmt"
_ "github.com/go-sql-driver/mysql"
)
func connectMysql() (*sql.DB, error) {
db, err := sql.Open("mysql", "root:password@tcp(127.0.0.1:3306)/golang_user")
if err != nil {
panic(err.Error())
}
return db, nil
}
func addUser(_login string, _password string, _userDescription string) error {
//do rejestracji uzytkownika
// Insert do bazy Mysql Nowego użytkownika
db, err := connectMysql()
if err != nil {
panic(err.Error())
return err
}
queryInsert := fmt.Sprintf(`INSERT INTO users (
login,
password,
userDescription,
points
)VALUES (
"%s",
"%s",
"%s",
"%d"
)`, _login, _password, _userDescription, 0) //przy rejestracji kzdy ma 0 punktow
fmt.Printf(queryInsert)
insert, err := db.Query(queryInsert)
if err != nil {
panic(err.Error())
return err
}
fmt.Println(insert)
return nil
}
func getAllUsers() []User {
//pobiera wszystkich uzytkownikow - do wysiwetlenie na front
/* --------------------- users -----------------------
userId int `json:"id"` // do pobierania z GET
login string `json:"login"`
password string `json:"password"`
userDescription string `json:"userDescription"`
points int `json:points`
*/
allUsers := []User{}
db, err := connectMysql()
result, err := db.Query("SELECT * FROM users")
if err != nil {
panic(err.Error())
}
for result.Next() {
var user User
err = result.Scan(&user.UserId, &user.Login, &user.Password, &user.UserDescription, &user.Points)
if err != nil {
panic(err.Error())
}
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fmt.Println(user)
allUsers = append(allUsers, user)
}
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// fmt.Println("All users: ", allUsers)
// fmt.Println(reflect.TypeOf(allUsers))
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return allUsers
}
func checkLoginExists(_login string) (bool, error) {
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//sprawdza czy dany login jest juz w bazie, przy rejestracji przydatne
db, err := connectMysql()
querySelect := fmt.Sprintf(`SELECT login FROM users WHERE login='%s' ;`, _login)
result, err := db.Query(querySelect)
if err != nil {
panic(err.Error())
return false, err
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}
for result.Next() {
var userLogin string
err = result.Scan(&userLogin)
if err != nil {
panic(err.Error())
return false, err
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}
if userLogin != "" {
return true, nil
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}
}
return false, nil
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}
func loginUser(_login string, _password string) (bool, error) {
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//do logowanie w bazie
db, err := connectMysql()
querySelect := fmt.Sprintf(`SELECT login FROM users WHERE login='%s' AND password='%s' ;`, _login, _password)
result, err := db.Query(querySelect)
if err != nil {
panic(err.Error())
return false, err
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}
for result.Next() {
var userLogin string
err = result.Scan(&userLogin)
if err != nil {
panic(err.Error())
return false, err
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}
if userLogin != "" {
return true, nil
}
}
return false, nil
}
func updateUserPoints(_login string) error {
db, err := connectMysql()
var userPoints int
querySelectPoints := fmt.Sprintf(`SELECT points FROM users WHERE login='%s' ;`, _login)
result, err := db.Query(querySelectPoints)
if err != nil {
panic(err.Error())
return err
}
for result.Next() { //pobieranie aktualnej liczby punktow uzytkownika
err = result.Scan(&userPoints)
if err != nil {
panic(err.Error())
return err
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}
}
queryUpdatePoints := fmt.Sprintf(`UPDATE users SET points = %d WHERE login ='%s' ;`, userPoints+1, _login)
result, err = db.Query(queryUpdatePoints)
if err != nil {
panic(err.Error())
return err
}
return nil //jak bez bledow wszystko
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}