marechai/Marechai/Pages/Admin/Details/DocumentCompany.razor.cs

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Blazorise;
using Marechai.Shared;
using Marechai.ViewModels;
using Microsoft.AspNetCore.Components;

namespace Marechai.Pages.Admin.Details
{
    public partial class DocumentCompany
    {
        List<CompanyViewModel>   _companies;
        bool                     _editing;
        bool                     _loaded;
        DocumentCompanyViewModel _model;
        bool                     _noLinkedCompany;
        bool                     _unknownName;

        [Parameter]
        public int Id { get; set; }

        protected override async Task OnAfterRenderAsync(bool firstRender)
        {
            if(_loaded)
                return;

            _loaded = true;

            if(Id <= 0)
                return;

            _companies = await CompaniesService.GetAsync();
            _model     = await Service.GetAsync(Id);

            _editing = NavigationManager.ToBaseRelativePath(NavigationManager.Uri).ToLowerInvariant().
                                         StartsWith("admin/document_companies/edit/",
                                                    StringComparison.InvariantCulture);

            if(_editing)
                SetCheckboxes();

            StateHasChanged();
        }

        void SetCheckboxes()
        {
            _noLinkedCompany = !_model.CompanyId.HasValue;
            _unknownName     = string.IsNullOrWhiteSpace(_model.Name);
        }

        void OnEditClicked()
        {
            _editing = true;
            SetCheckboxes();
            StateHasChanged();
        }

        async void OnCancelClicked()
        {
            _editing = false;
            _model   = await Service.GetAsync(Id);
            SetCheckboxes();
            StateHasChanged();
        }

        async void OnSaveClicked()
        {
            if(_noLinkedCompany)
                _model.CompanyId = null;
            else if(_model.CompanyId < 0)
                return;

            if(_unknownName)
                _model.Name = null;
            else if(string.IsNullOrWhiteSpace(_model.Name))
                return;

            _editing = false;
            await Service.UpdateAsync(_model);
            _model = await Service.GetAsync(Id);
            SetCheckboxes();
            StateHasChanged();
        }

        void ValidateName(ValidatorEventArgs e) =>
            Validators.ValidateString(e, L["Name must be smaller than 256 characters."], 256);
    }
}