HyperCube/Pages/DocsUpload.razor

@page "/docsupload"
@using System.IO;
@attribute [Authorize]
@*@attribute [Authorize(Roles = "admin")]*@

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

    <h1>Загрузка материала</h1>

    <div style="width: 50%;">
        <p><InputFile id="inputDefault" OnChange="@HandleSelection" accept="application/pdf, application/msword, application/vnd.openxmlformats-officedocument.wordprocessingml.document" /></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>
        <p><button class="btn btn-primary" type="submit">Загрузить</button></p>
        <p>Статус: @status</p>
    </div>
</EditForm>

@code {
    @inject NavigationManager NavigationManager;
    @inject IJSRuntime JsRuntime;

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

    private Models.ArticleModel articleModel = new Models.ArticleModel();

    private string status;
    MemoryStream memoryStream;

    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();

        string path = System.AppDomain.CurrentDomain.BaseDirectory;
        Directory.CreateDirectory(Path.Combine(path, FOLDER_NAME));
        string fullpath = Path.Combine(path, FOLDER_NAME, $"{id}_{articleModel.Filename}");

        Console.WriteLine($"memorystream: {memoryStream.Length}, filename: {articleModel.Filename}");

        FileStream fs = new(fullpath, FileMode.Create, FileAccess.Write);
        //byte[] bytes = new byte[memoryStream.Length];
        //await memoryStream.ReadAsync(bytes, 0, (int)memoryStream.Length);
        //await fs.WriteAsync(bytes, 0, bytes.Length);
        await memoryStream.CopyToAsync(fs);
        memoryStream.Close();
        fs.Close();

        Console.WriteLine("Article data saved");
        status = "Article data saved";

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

    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;
        }
    }
}