package main

import (
    "net/http"
    db "./database_sql"
    router "./router"
)

func main() {

    db.Init_SQL();

    router.Init_routes()

    http.ListenAndServe(":8080", router.GetRouter())

}

package database_sql

import (
    "fmt"
    "database/sql"
    _ "github.com/go-sql-driver/mysql"
)

var DB *sql.DB // global variable to share it between main and the HTTP handler
//var dbi *databaseinfos

func Init_SQL() {
    dbi := databaseinfos{
            user: "root",
            password: "root",
            name: "captainsam",
            address: "localhost",
            port: "3306",
            url: ""}
    dbi.url = (dbi.user + ":" + dbi.password + "@tcp(" + dbi.address + ":" + dbi.port + ")/" + dbi.name)

    db_init_var, err := sql.Open("mysql", dbi.url)
    if err != nil {
            fmt.Println("Error on initializing database connection: %s", err.Error())
    }

    err = db_init_var.Ping()
    if err != nil {
            fmt.Println("Error on opening database connection: %s", err.Error())
    }

    // Here, as you can test, my variable is initialized
    if err == nil {
            DB = db_init_var
            if DB == nil {
                    fmt.Println("NIL DB !!")
            }
            if db_init_var == nil {
                    fmt.Println("NIL db_init_var !!")
            }
            fmt.Println(dbi.url)
    }
}

package database_sql

import (
    "encoding/json"
    "fmt"
    "net/http"
    m "models"
)

func CanLogin(user m.User) (bool, m.User, m.StatusBack) {

    // Prepare statement for reading data
    stmtOut, err := DB.Prepare("SELECT username, password, token FROM users WHERE username = ? AND password = ?")
    if err != nil {
            return false, user, m.StatusBack{ToString: err.Error(), IdStatus: http.StatusInternalServerError}
    }
defer stmtOut.Close()

    // Query the user
err = stmtOut.QueryRow(user.Username, user.Password).Scan(&user.Username, &user.Password, &user.UUID) // WHERE user is registered
    if err != nil {
            return false, user, m.StatusBack{ToString: "User not found.", IdStatus: http.StatusNotFound}
    } else {

            j, err := json.Marshal(user)
            if err == nil {
                    return true, user, m.StatusBack{ToString: string(j), IdStatus: http.StatusOK}
            } else {
                    return false, user, m.StatusBack{ToString: err.Error(), IdStatus: http.StatusInternalServerError}
    }
    }

}