Export Data Visualization in Core Environment

public class HomeController : Controller
{
    // IWebHostEnvironment used with sample to get the application data from wwwroot.
    private Microsoft.AspNetCore.Hosting.IWebHostEnvironment _hostingEnvironment;

    // IWebHostEnvironment initialized with controller to get the data from application data folder.
    public HomeController(Microsoft.AspNetCore.Hosting.IWebHostEnvironment hostingEnvironment)
    {
        _hostingEnvironment = hostingEnvironment;
    }

    public IActionResult Index()
    {
        return View();
    }

    [HttpPost]
    public IActionResult Export(string writerFormat)
    {
        string fileName = null;
        WriterFormat format;
        string basePath = _hostingEnvironment.WebRootPath;
        // Here, we have loaded the sample report from application the folder wwwroot.
        FileStream inputStream = new FileStream(basePath + @"\Resources\product-line-sales.rdl", FileMode.Open, FileAccess.Read);
        MemoryStream reportStream = new MemoryStream();
        inputStream.CopyTo(reportStream);
        reportStream.Position = 0;
        inputStream.Close();
        BoldReports.Writer.ReportWriter writer = new BoldReports.Writer.ReportWriter();

        // Puppeteer Option to export the data visualization report items.
        writer.ExportResources.BrowserType = ExportResources.BrowserTypes.External;
        writer.ExportResources.ResourcePath = basePath + @"/Puppeteer/";
        // Initialize the class for puppeteer
        writer.ExportSettings = new customBrowsertype(writer.ExportResources.ResourcePath);

        writer.ExportResources.Scripts = new List<string>
        {
            //Report Viewer component dependent script
            "https://cdn.boldreports.com/6.3.24/scripts/v2.0/common/bold.reports.common.min.js",
            "https://cdn.boldreports.com/6.3.24/scripts/v2.0/common/bold.reports.widgets.min.js",
             //Report Viewer Script
            "https://cdn.boldreports.com/6.3.24/scripts/v2.0/bold.report-viewer.min.js"
        };
        writer.ExportResources.DependentScripts = new List<string>
        {
            "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"
        };

        if (writerFormat == "PDF")
        {
            fileName = "ProductLineSales.pdf";
            format = WriterFormat.PDF;
        }
        else if (writerFormat == "Word")
        {
            fileName = "ProductLineSales.docx";
            format = WriterFormat.Word;
        }
        else if (writerFormat == "CSV")
        {
            fileName = "ProductLineSales.CSV";
            format = WriterFormat.CSV;
        }
        else
        {
            fileName = "ProductLineSales.xlsx";
            format = WriterFormat.Excel;
        }

        writer.LoadReport(reportStream);
        MemoryStream memoryStream = new MemoryStream();
        writer.Save(memoryStream, format);
        // Download the generated document from client.
        memoryStream.Position = 0;
        FileStreamResult fileStreamResult = new FileStreamResult(memoryStream, "application/pdf");
        fileStreamResult.FileDownloadName = fileName;
        return fileStreamResult;
    }

    // Add the class to override the method for puppeteer
    public class CustomBrowserType : ExportSettings
    {
        private string puppeteerPath;

        public CustomBrowserType(string path)
        {
            puppeteerPath = path;
        }
        // Can be used to rendered html data visualization from the given url and convert the image to base 64 string by using external browser
        public override string GetImageFromHTML(string url)
        {
            return LaunchPuppeteer(url).Result;
        }
        // Can be used to convert the image from Puppeteer
        public async Task<string> LaunchPuppeteer(string url)
        {
        // Assigned the chrome.exe path to the puppeteer
            await using var browser = await Puppeteer.LaunchAsync(new LaunchOptions { Headless = true, ExecutablePath =  puppeteerPath + @"chrome-win/chrome.exe"});
            await using var page = await browser.NewPageAsync();
            await page.GoToAsync(url);
            return await page.WaitForSelectorAsync("#imagejsonData").Result.GetPropertyAsync("innerText").Result.JsonValueAsync<string>();
        }
    }
}

public class HomeController : Controller
{
    // IWebHostEnvironment is used in this example to retrieve application data from wwwroot.
    private Microsoft.AspNetCore.Hosting.IWebHostEnvironment _hostingEnvironment;

    // IWebHostEnvironment is initialized in the controller to access data from the application data folder
    public HomeController(Microsoft.AspNetCore.Hosting.IWebHostEnvironment hostingEnvironment)
    {
        _hostingEnvironment = hostingEnvironment;
    }

    public IActionResult Index()
    {
        return View();
    }

    [HttpPost]
    public IActionResult Export(string writerFormat)
    {
        string fileName = null;
        WriterFormat format;
        string basePath = _hostingEnvironment.WebRootPath;
        // Load the sample report from the application's wwwroot folder.
        FileStream inputStream = new FileStream(basePath + @"/Resources/product-line-sales.rdl", FileMode.Open, FileAccess.Read);
        MemoryStream reportStream = new MemoryStream();
        inputStream.CopyTo(reportStream);
        reportStream.Position = 0;
        inputStream.Close();
        BoldReports.Writer.ReportWriter writer = new BoldReports.Writer.ReportWriter();

        writer.ExportResources.BrowserType = ExportResources.BrowserTypes.External;
        writer.ExportResources.ResourcePath = Path.Combine(basePath, "Playwright");
        writer.ExportSettings = new HeadlessBrowser(writer.ExportResources.ResourcePath);

        writer.ExportResources.Scripts = new List<string>
        {
            //Report Viewer component dependent script
        "https://cdn.boldreports.com/6.3.24/scripts/v2.0/common/bold.reports.common.min.js",
        "https://cdn.boldreports.com/6.3.24/scripts/v2.0/common/bold.reports.widgets.min.js",
            //Report Viewer Script
        "https://cdn.boldreports.com/6.3.24/scripts/v2.0/bold.report-viewer.min.js"
        };
        writer.ExportResources.DependentScripts = new List<string>
        {
        "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"
        };

        if (writerFormat == "PDF")
        {
            fileName = "ProductLineSales.pdf";
            format = WriterFormat.PDF;
        }
        else if (writerFormat == "Word")
        {
            fileName = "ProductLineSales.docx";
            format = WriterFormat.Word;
        }
        else if (writerFormat == "CSV")
        {
            fileName = "ProductLineSales.CSV";
            format = WriterFormat.CSV;
        }
        else
        {
            fileName = "ProductLineSales.xlsx";
            format = WriterFormat.Excel;
        }

        writer.LoadReport(reportStream);
        MemoryStream memoryStream = new MemoryStream();
        writer.Save(memoryStream, format);
        // Download the generated document from client.
        memoryStream.Position = 0;
        FileStreamResult fileStreamResult = new FileStreamResult(memoryStream, "application/pdf");
        fileStreamResult.FileDownloadName = fileName;
        return fileStreamResult;
    }
}

public class HeadlessBrowser : ExportSettings
{
    /// <summary>
    /// Gets or sets the path to the browser executable resource.
    /// </summary>
    public string ResourcePath { get; set; }

    private readonly string _logPath;

    /// <summary>
    /// Initializes a new instance of the <see cref="HeadlessBrowser"/> class with the specified resource path.
    /// </summary>
    /// <param name="resourcePath">The path to the browser executable resource.</param>
    public HeadlessBrowser(string resourcePath)
    {
        ResourcePath = resourcePath;
        string baseDirectory = AppContext.BaseDirectory;
        string wwwrootPath = Path.Combine(baseDirectory, "wwwroot");
        _logPath = Path.Combine(wwwrootPath, "logs", "error_log.txt");
    }

    /// <summary>
    /// Retrieves an image from the specified HTML URL and converts it to a base64 string.
    /// </summary>
    /// <param name="url">The URL of the HTML content.</param>
    /// <returns>A base64 string representation of the image.</returns>
    public override string GetImageFromHTML(string url)
    {
        string result = "";

        try
        {
            result = ConvertBase64(url).Result;
        }
        catch (Exception ex)
        {
            throw new Exception("Exception occurred while getting image from HTML.", ex);
        }

        return result;
    }

    /// <summary>
    /// Asynchronously converts HTML content from the specified URL to a base64 string.
    /// </summary>
    /// <param name="url">The URL of the HTML content.</param>
    /// <returns>A task representing the asynchronous operation. The task result contains the base64 string representation of the HTML content.</returns>
    public async Task<string> ConvertBase64(string url)
    {
        string result = "";

        try
        {

            var exitCode = Microsoft.Playwright.Program.Main(new[] { "install", "chromium" });
            if (exitCode != 0)
            {
                Console.WriteLine("Failed to install browsers");
                return "";
            }

            using var playwright = await Playwright.CreateAsync();
            await using var browser = await playwright.Chromium.LaunchAsync(new BrowserTypeLaunchOptions
            {
                Headless = true,
                ExecutablePath = Path.Combine(ResourcePath, @"chrome-win64\chrome.exe")
            });

            var context = await browser.NewContextAsync();
            var page = await context.NewPageAsync();
            try
            {
                await page.GotoAsync(url);
            }
            catch (Exception ex)
            {
                throw new Exception("Exception occurred while converting data to Base64.", ex);
            }
            var element = await page.WaitForSelectorAsync("#imagejsonData");
            result = await element.InnerTextAsync();
        }
        catch (Exception ex)
        {
            throw new Exception("Exception occurred while converting data to Base64.", ex);
        }

        return result;
    }
}

public class HomeController : Controller
{
    // IWebHostEnvironment used with sample to get the application data from wwwroot.
    private Microsoft.AspNetCore.Hosting.IWebHostEnvironment _hostingEnvironment;

    // IWebHostEnvironment initialized with controller to get the data from application data folder.
    public HomeController(Microsoft.AspNetCore.Hosting.IWebHostEnvironment hostingEnvironment)
    {
        _hostingEnvironment = hostingEnvironment;
    }

    public IActionResult Index()
    {
        return View();
    }

    [HttpPost]
    public IActionResult Export(string writerFormat)
    {
        string fileName = null;
        WriterFormat format;
        string basePath = _hostingEnvironment.WebRootPath;
        // Here, we have loaded the sample report from application the folder wwwroot.
        FileStream inputStream = new FileStream(basePath + @"\Resources\product-line-sales.rdl", FileMode.Open, FileAccess.Read);
        MemoryStream reportStream = new MemoryStream();
        inputStream.CopyTo(reportStream);
        reportStream.Position = 0;
        inputStream.Close();
        BoldReports.Writer.ReportWriter writer = new BoldReports.Writer.ReportWriter();

        // PhantomJS Option to export the data visualization report items.
        writer.ExportResources.UsePhantomJS = true;
        // Set the IncludeText property to true, when text not displayed in the data visualization images.
        writer.ExportResources.IncludeText = true;
        writer.ExportResources.PhantomJSPath = basePath + @"\PhantomJS\";

        writer.ExportResources.Scripts = new List<string>
        {
            //Report Viewer component dependent script
            "https://cdn.boldreports.com/6.3.24/scripts/v2.0/common/bold.reports.common.min.js",
            "https://cdn.boldreports.com/6.3.24/scripts/v2.0/common/bold.reports.widgets.min.js",
             //Report Viewer Script
            "https://cdn.boldreports.com/6.3.24/scripts/v2.0/bold.report-viewer.min.js"
        };
        writer.ExportResources.DependentScripts = new List<string>
        {
            "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"
        };

        if (writerFormat == "PDF")
        {
            fileName = "ProductLineSales.pdf";
            format = WriterFormat.PDF;
        }
        else if (writerFormat == "Word")
        {
            fileName = "ProductLineSales.docx";
            format = WriterFormat.Word;
        }
        else if (writerFormat == "CSV")
        {
            fileName = "ProductLineSales.CSV";
            format = WriterFormat.CSV;
        }
        else
        {
            fileName = "ProductLineSales.xlsx";
            format = WriterFormat.Excel;
        }

        writer.LoadReport(reportStream);
        MemoryStream memoryStream = new MemoryStream();
        writer.Save(memoryStream, format);

        // Download the generated document from client.
        memoryStream.Position = 0;
        FileStreamResult fileStreamResult = new FileStreamResult(memoryStream, "application/pdf");
        fileStreamResult.FileDownloadName = fileName;
        return fileStreamResult;
    }
}