public static int MoveThroughPagesOrCheckDrinkInfo(List <Drink> contemporaryList, int page)
{
do
{
SearchDrinkConsoleUi.PrintInstructionWhileOnPagedList(contemporaryList, page);
var choice = Console.ReadKey();
Console.Clear();
// Moves to drink info if user press 1 - 9
if (char.IsDigit(choice.KeyChar))
{
if (choice.KeyChar != '0')
{
// select the drink form the list
var drink = contemporaryList[page * 9 + int.Parse(choice.KeyChar.ToString()) - 1];
Console.WriteLine();
if (TryToWriteDrinkInfo(drink) == false)
{
return(-1);
}
SearchDrinkConsoleUi.DisplayProductDetailsOptions(drink);
SearchDrinkConsoleUi.ReWriteDrinkListOnConsole(contemporaryList, page, choice);
}
//Cleans and rewrites list if user picked 0
SearchDrinkConsoleUi.ReWriteDrinkListOnConsole(contemporaryList, page, choice);
}
//If user picked N for Next Page, page is increased
else if (choice.Key == ConsoleKey.N)
{
if (CheckIfUserCanGoToNextPage(contemporaryList, page, choice))
{
page++;
return(page);
}
}
//If user picked P for Previous Page, page is decreased
else if (choice.Key == ConsoleKey.P)
{
if (CheckIfUserCanGoBackToPreviousPage(contemporaryList, page, choice))
{
page--;
return(page);
}
}
//Exits to main menu
else if (choice.Key == ConsoleKey.Escape)
{
return(-1);
}
//Rewrites drink list to console if user gives unsupported input
else
{
SearchDrinkConsoleUi.ReWriteDrinkListOnConsole(contemporaryList, page, choice);
}
}while (true);
}
public static bool CheckIfUserCanGoBackToPreviousPage(List <Drink> contemporaryList, int page, ConsoleKeyInfo choice)
{
if (page == 0)
{
SearchDrinkConsoleUi.ReWriteDrinkListOnConsole(contemporaryList, page, choice);
SearchDrinkConsoleUi.TellUserThatHeCanNotGoBack(contemporaryList, page);
return(false);
}
return(true);
}
public static bool CheckIfUserCanGoToNextPage(List <Drink> contemporaryList, int page, ConsoleKeyInfo choice)
{
if (page * 9 + 9 > contemporaryList.Count)
{
SearchDrinkConsoleUi.ReWriteDrinkListOnConsole(contemporaryList, page, choice);
SearchDrinkConsoleUi.TellUserThatHeCanNotGoToNextPage(page);
return(false);
}
return(true);
}