marechai/Marechai/Pages/Consoles/Search.razor

@{
/******************************************************************************
// MARECHAI: Master repository of computing history artifacts information
// ----------------------------------------------------------------------------
//
// Filename       : Search.razor
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// --[ Description ] ----------------------------------------------------------
//
//     Consoles search
//
// --[ License ] --------------------------------------------------------------
//
//     This program is free software: you can redistribute it and/or modify
//     it under the terms of the GNU General Public License as
//     published by the Free Software Foundation, either version 3 of the
//     License, or (at your option) any later version.
//
//     This program is distributed in the hope that it will be useful,
//     but WITHOUT ANY WARRANTY; without even the implied warranty of
//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//     GNU General Public License for more details.
//
//     You should have received a copy of the GNU General Public License
//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2003-2020 Natalia Portillo
*******************************************************************************/
}

@page "/consoles/all"
@page "/consoles/year/{Year:int}"
@page "/consoles/{StartingCharacter}"
@inherits OwningComponentBase<ConsolesService>
@inject IStringLocalizer<ConsolesService> L

@if (_consoles is null)
{
    @L["Loading..."]
}

<p>@L["Search results:"]</p>
<p align="center">
    @if (_character.HasValue)
    {
        <b>@string.Format(L["Videogame consoles starting with {0}"], _character)</b>
        <br />
    }
    else if (Year.HasValue)
    {
        <b>@string.Format(L["Videogame consoles introduced in {0}"], Year)</b>
        <br />
    }

    @if (_consoles?.Count > 0)
    {
        <p>
            @string.Format(L["{0} videogame consoles found in the database."], _consoles.Count)
            <br />
            @foreach (var console in _consoles)
            {
                <a href="/machine/@console.Id">
                    @console.CompanyName @console.Name</a>
                <br />
            }
        </p>
    }
    else
    {
        @if (_character.HasValue)
        {
            <p>@L["There are no videogame consoles found in the database that start with this letter."]</p>
        }
        else if (Year.HasValue)
        {
            <p>@L["There are no videogame consoles found introduced this year."]</p>
        }
    }
</p>

@code
{
    [Parameter]
    public int? Year { get; set; }

    [Parameter]
    public string StartingCharacter { get; set; }

    List<MachineViewModel> _consoles;
    char? _character;

    protected override async Task OnInitializedAsync()
    {
        _character = null;
        if (!string.IsNullOrWhiteSpace(StartingCharacter) &&
            StartingCharacter.Length == 1)
        {
            _character = StartingCharacter[0];

    // ToUpper()
            if (_character >= 'a' &&
                _character <= 'z')
                _character -= (char)32;


    // Check if not letter or number
            if (_character < '0' ||
                (_character > '9' && _character < 'A') ||
                _character > 'Z')
                _character = null;
        }

        if (_character.HasValue)
            _consoles = await Service.GetConsolesByLetterAsync(_character.Value);

        if (Year.HasValue &&
            _consoles is null)
            _consoles = await Service.GetConsolesByYearAsync(Year.Value);

        _consoles ??= await Service.GetConsolesAsync();
    }
}