Add export controller for PDF and Excel

src/Blogifier.Core/Providers/BucketProvider.cs

@@ -118,7 +118,7 @@ public async Task<string> DownloadFile(string keyName)
                 }
                 return responseBody;
             }
-            catch (AmazonS3Exception e)
+            catch (AmazonS3Exception)
             {
                 // If bucket or object does not exist
                 return "Error";

src/Blogifier/Blogifier.csproj

@@ -7,6 +7,8 @@
 
 	<ItemGroup>
 		<PackageReference Include="AWSSDK.S3" Version="3.7.0.15" />
+		<PackageReference Include="ClosedXML" Version="0.95.4" />
+		<PackageReference Include="iTextSharp" Version="5.5.13.2" />
 		<PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Server" Version="5.0.1" />
 		<PackageReference Include="Microsoft.AspNetCore.Server.IISIntegration" Version="2.2.1" />
 		<PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="5.0.1">

src/Blogifier/Controllers/ExportController.cs

@@ -0,0 +1,134 @@
+using System.Data;
+using System;
+using Blogifier.Core.Providers;
+using Blogifier.Core.Data;
+using Blogifier.Shared;
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using System.Collections.Generic;
+using System.Security.Claims;
+using System.Threading.Tasks;
+using ClosedXML;
+using iTextSharp;
+using System.IO;
+using iTextSharp.text;
+using iTextSharp.text.pdf;
+using ClosedXML.Excel;
+
+namespace Blogifier.Controllers
+{
+    [Route("api/[controller]")]
+	[ApiController]
+    public class ExportController : ControllerBase
+    {
+        private readonly INewsletterProvider _newsletterProvider;
+        private readonly IHttpContextAccessor _httpContextAccessor; 
+        private readonly string fixedPath = "Downloads/";
+
+		public ExportController(INewsletterProvider newsletterProvider, IHttpContextAccessor contextAccessor)
+		{
+			_newsletterProvider = newsletterProvider;
+            _httpContextAccessor = contextAccessor;
+		}
+
+        [Authorize]
+		[HttpGet("emails/{fileType}")]
+		public async Task<IActionResult> ExportToFileType(string fileType)
+		{
+			var emails = await _newsletterProvider.GetSubscribers();
+
+            var compare = fileType.ToLower();
+
+            switch (compare) {
+                case "pdf":
+                    int pdfRowIndex = 1;  
+
+                    string filename = "subscribers_export" + DateTime.Now.ToString() + ".pdf";  
+                    // string filepath = Path.Combine(_httpContextAccessor.HttpContext.Request.Host.Value + "/" + fixedPath, filename); 
+                    // FileStream fs = new FileStream(filepath, FileMode.Create);  
+                    using (MemoryStream stream = new MemoryStream()) {
+                        Document document = new Document(PageSize.A4, 5f, 5f, 10f, 10f);  
+                        PdfWriter writer = PdfWriter.GetInstance(document, stream);  
+                        document.Open();  
+
+                        Font font1 = FontFactory.GetFont(FontFactory.COURIER_BOLD, 10);  
+                        Font font2 = FontFactory.GetFont(FontFactory.COURIER, 8);  
+
+                        float[] columnDefinitionSize = { 2F, 5F, 2F, 5F };  
+                        PdfPTable table;  
+                        PdfPCell cell;  
+
+                        table = new PdfPTable(columnDefinitionSize)  
+                        {  
+                            WidthPercentage = 100  
+                        };  
+
+                        cell = new PdfPCell  
+                        {  
+                            BackgroundColor = new BaseColor(0xC0, 0xC0, 0xC0)  
+                        };  
+
+                        table.AddCell(new Phrase("SubscriberId", font1));  
+                        table.AddCell(new Phrase("Email", font1));  
+                        table.AddCell(new Phrase("IP", font1));  
+                        table.AddCell(new Phrase("Country", font1));
+                        table.AddCell(new Phrase("Region", font1));
+                        table.AddCell(new Phrase("Blog", font1));  
+                        table.HeaderRows = 1;  
+
+                        foreach (var data in emails)  
+                        {  
+                            table.AddCell(new Phrase(data.Id.ToString(), font2));  
+                            table.AddCell(new Phrase(data.Email.ToString(), font2));  
+                            table.AddCell(new Phrase(data.Ip.ToString(), font2));  
+                            table.AddCell(new Phrase(data.Country.ToString(), font2));  
+                            table.AddCell(new Phrase(data.Region.ToString(), font2));  
+                            table.AddCell(new Phrase(data.Blog.ToString(), font2));  
+                            pdfRowIndex++;  
+                        }  
+
+                        document.Add(table);  
+                        document.Close();  
+                        document.CloseDocument();  
+                        document.Dispose();  
+                        writer.Close();  
+                        writer.Dispose();  
+                        return File(stream.ToArray(), "application/pdf", filename);
+                    }
+                case "excel":
+                    using (XLWorkbook workBook = new XLWorkbook())  
+                    { 
+                        workBook.AddWorksheet(GetEmails(emails));
+                        using (MemoryStream stream = new MemoryStream())  
+                        {  
+                            workBook.SaveAs(stream);  
+                            return File(stream.ToArray(), "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "Subscribers.xlsx");  
+                        }  
+                    }  
+                default:
+                    break;
+            }
+            return Ok();
+		}
+
+        private DataTable GetEmails(List<Subscriber> subscribers)  
+        {  
+
+            DataTable dtSubs = new DataTable("Subscribers");  
+            dtSubs.Columns.AddRange(new DataColumn[6] { new DataColumn("SubscriberID"),  
+                                            new DataColumn("Email"),  
+                                            new DataColumn("IP"),  
+                                            new DataColumn("Country"),
+                                            new DataColumn("Region"),
+                                            new DataColumn("Blog") });  
+            foreach (var s in subscribers)  
+            {  
+                dtSubs.Rows.Add(s.Id, s.Email.ToString(), s.Ip.ToString(), s.Country.ToString(), s.Region.ToString(), s.Blog.ToString());  
+            }  
+
+            return dtSubs;  
+        }  
+    }
+}