HyperCube/Pages/DocEdit.razor

@page "/docedit"
@page "/docedit/{docID:int}"
@using HyperCube.Models;
@inject NavigationManager NavigationManager;
@inject IJSRuntime JsRuntime;
@attribute [Authorize]
@*@attribute [Authorize(Roles = "admin")]*@

<EditForm Model="@articleModel" OnValidSubmit="@HandleValidSubmit">
    <DataAnnotationsValidator />
    <ValidationSummary />

    <h1>@header</h1>
    <br>
    <div style="width: 50%;">
        @if (docID < 1)
        {
            <p><InputFile id="inputDefault" OnChange="@HandleSelection"
                           accept="application/pdf" /></p>
            //accept="application/pdf, application/msword, application/vnd.openxmlformats-officedocument.wordprocessingml.document"
        }
        else
        {            
            //<p>Исходный документ: <a href="" @onclick="@DownloadDoc" @onclick:preventDefault>@articleModel.Filename</a></p>
            <p>Исходный документ: <a href=@FOLDER_NAME download="@articleModel.Filename" target="_top">@articleModel.Filename</a></p>
        }
        <p><InputText id="article_name" class="form-control" @bind-Value="articleModel.Name" placeholder="Наименование статьи" /></p>
        <p><InputDate id="date_publish" class="form-control" @bind-Value="articleModel.PublishDate" placeholder="Дата издания" /></p>
        <p><InputText id="author" class="form-control" @bind-Value="articleModel.Authors" placeholder="Автор" /></p>
        <p><InputTextArea id="keywords" class="form-control" @bind-Value="articleModel.Keywords" placeholder="Ключевые слова" /></p>
        <p><InputTextArea rows="5" id="annotation" class="form-control" @bind-Value="articleModel.Annotation" placeholder="Аннотация" /></p>
        <p><InputTextArea rows="10" id="text" class="form-control" @bind-Value="articleModel.Text" placeholder="Текст" /></p>
        @if (docID < 1)
        {
            <p><button class="btn btn-primary" type="submit">Загрузить</button></p>
        }
        else
        {
            <p>
                <button class="btn btn-danger" type="button" @onclick="@Cancel">Отклонить</button>
                <button class="btn btn-primary" type="submit">Утвердить</button>
            </p>
        }
        <p>Статус: @status</p>
    </div>
</EditForm>

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

    const string FOLDER_NAME = "articles_storage";
    const long MAX_FILE_SIZE = 5120000; //bytes

    ArticleModel articleModel = new ArticleModel();
    string status;
    string header;
    string storageFolderPath;
    MemoryStream memoryStream;

    protected override async Task OnInitializedAsync()
    {
        string path = AppDomain.CurrentDomain.BaseDirectory;
        storageFolderPath = (Path.Combine(path, FOLDER_NAME));

        if (docID > 0)
        {
            header = "Проверка материала";

            MySQLConnector dbCon = MySQLConnector.Instance();

            string stringSQL = $"SELECT id, filename, article_name, authors, date_publish, annotation, keywords FROM articles WHERE id={docID}";
            articleModel = await dbCon.SQLSelectArticle(stringSQL);

            status = $"Article ID={docID} loaded.";
        }
        else
            header = "Загрузка материала";
    }

    private async void HandleValidSubmit()
    {
        MySQLConnector dbCon = MySQLConnector.Instance();

        string stringSQL = $"INSERT INTO articles (filename, article_name, authors, date_publish, annotation, keywords)" +
            $"VALUES ('{articleModel.Filename}', '{articleModel.Name}', '{articleModel.Authors}', '{articleModel.PublishDate.ToString("yyyy-MM-dd")}'," +
            $"'{articleModel.Annotation}', '{articleModel.Keywords}')";
        long id = dbCon.SQLInsert(stringSQL);

        stringSQL = $"INSERT INTO actions_history (article_id, action_type, acc_id)" +
        $"VALUES ('{id}', {1}, {1})";
        dbCon.SQLInsert(stringSQL);

        dbCon.Close();

        //Console.WriteLine($"memorystream: {memoryStream.Length}, filename: {articleModel.Filename}");
        string fullpath = Path.Combine(storageFolderPath, $"{id}_{articleModel.Filename}");
        Directory.CreateDirectory(storageFolderPath);
        FileStream fs = new(fullpath, FileMode.Create, FileAccess.Write);
        await memoryStream.CopyToAsync(fs);
        memoryStream.Close();
        fs.Close();

        Console.WriteLine($"User has saved new article data, {id}_{articleModel.Filename}");
        status = "New article data saved.";

        bool confirmed = await JsRuntime.InvokeAsync<bool>("confirm", "Хотите загрузить еще статью?");
        if (confirmed)
            NavigationManager.NavigateTo("docedit", true);
        else
            NavigationManager.NavigateTo("");
    }

    private async Task HandleSelection(InputFileChangeEventArgs e)
    {
        IBrowserFile file = e.File;
        if (file != null)
        {
            Stream stream = file.OpenReadStream(MAX_FILE_SIZE);
            memoryStream = new();
            await stream.CopyToAsync(memoryStream);
            status = $"Finished loading {memoryStream.Length} bytes from {file.Name}";

            DocParse docParse = new DocParse();
            articleModel = DocParse.ReadPDF(memoryStream);
            articleModel.Filename = file.Name;
        }
    }

    private async void Cancel()
    {
        bool confirmed = await JsRuntime.InvokeAsync<bool>("confirm", "Вы уверены, что хотите отклонить статью?");
        if (confirmed)
        {
            ///какая-то логика отмены...
            NavigationManager.NavigateTo("");
        }
    }

    private async void DownloadDoc()
    {
        string fullpath = Path.Combine(storageFolderPath, $"{docID}_{articleModel.Filename}");
        if (File.Exists(fullpath))
        {
            //await JsRuntime.InvokeAsync<string>("downloadFile", fullpath);
        }
        else
        {
            Console.WriteLine($"File {fullpath} not found.");
            status = $"File {fullpath} not found.";
        }
    }
}