From 6e72e69cfbef65c05005c793e0928b4d81224234 Mon Sep 17 00:00:00 2001
From: Syndamia <kamen.d.mladenov@protonmail.com>
Date: Tue, 11 May 2021 12:57:32 +0300
Subject: Added Cloudinary service and configured it

---
 ExamTemplate/Services/CloudinaryService.cs | 49 ++++++++++++++++++++++++++++++
 ExamTemplate/Services/Services.csproj      |  1 +
 ExamTemplate/Web/Startup.cs                |  5 +++
 ExamTemplate/Web/appsettings.json          |  5 +++
 4 files changed, 60 insertions(+)
 create mode 100644 ExamTemplate/Services/CloudinaryService.cs

diff --git a/ExamTemplate/Services/CloudinaryService.cs b/ExamTemplate/Services/CloudinaryService.cs
new file mode 100644
index 0000000..03b7265
--- /dev/null
+++ b/ExamTemplate/Services/CloudinaryService.cs
@@ -0,0 +1,49 @@
+using System.Collections.Generic;
+using System.IO;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+using CloudinaryDotNet;
+using CloudinaryDotNet.Actions;
+using Microsoft.AspNetCore.Http;
+
+namespace ExamTemplate.Services
+{
+	public class CloudinaryService
+	{
+		// Regex for getting the filename without (final) filename extension
+		// So, from image.png, it will match image, and from doc.my.txt will match doc.my
+		private static readonly Regex s_imageRegex = new(".*(?=\\.)");
+
+		private readonly Cloudinary _cloudinary;
+
+		public CloudinaryService(string cloudName, string apiKey, string apiSecret)
+		{
+			this._cloudinary = new Cloudinary(new Account(cloudName, apiKey, apiSecret));
+		}
+
+		public async Task<List<string>> UploadFilesToCloud(List<IFormFile> formFiles)
+		{
+			List<string> fileUrls = new();
+			foreach (var formFile in formFiles)
+			{
+				string fileName = s_imageRegex.Match(formFile.FileName).ToString();
+
+				using var ms = new MemoryStream();
+				formFile.CopyTo(ms);
+				byte[] formBytes = ms.ToArray();
+
+				RawUploadParams rawUploadParams = new()
+				{
+					File = new FileDescription(fileName, new MemoryStream(formBytes)),
+					PublicId = fileName,
+					UseFilename = true
+				};
+
+				RawUploadResult rawUploadResult = await this._cloudinary.UploadAsync(rawUploadParams);
+				fileUrls.Add(rawUploadResult.Url.AbsoluteUri);
+			}
+
+			return fileUrls;
+		}
+	}
+}
diff --git a/ExamTemplate/Services/Services.csproj b/ExamTemplate/Services/Services.csproj
index 9383013..eb60f3d 100644
--- a/ExamTemplate/Services/Services.csproj
+++ b/ExamTemplate/Services/Services.csproj
@@ -7,6 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="Automapper" Version="10.1.1" />
+    <PackageReference Include="CloudinaryDotNet" Version="1.15.1" />
     <PackageReference Include="Microsoft.AspNetCore.Identity" Version="2.2.0" />
   </ItemGroup>
 
diff --git a/ExamTemplate/Web/Startup.cs b/ExamTemplate/Web/Startup.cs
index ba8737f..bfaab91 100644
--- a/ExamTemplate/Web/Startup.cs
+++ b/ExamTemplate/Web/Startup.cs
@@ -33,6 +33,11 @@ namespace ExamTemplate.Web
 			 * Dependency Injection configuration
 			 */
 
+			services.AddTransient<CloudinaryService>(options =>
+				new CloudinaryService(
+					cloudName: this.Configuration.GetSection("Cloud").GetSection("cloudName").Value,
+					apiKey: this.Configuration.GetSection("Cloud").GetSection("apiKey").Value,
+					apiSecret: this.Configuration.GetSection("Cloud").GetSection("apiSecret").Value));
 			services.AddTransient<UserService>();
 
 			/* 
diff --git a/ExamTemplate/Web/appsettings.json b/ExamTemplate/Web/appsettings.json
index f49d9ab..f1b58be 100644
--- a/ExamTemplate/Web/appsettings.json
+++ b/ExamTemplate/Web/appsettings.json
@@ -2,6 +2,11 @@
   "ConnectionStrings": {
     "LocalDBConnection": "Server=localhost;Port=5432;Database=TemplateContext;User Id=;Password=;"
   },
+  "Cloud": {
+    "cloudName": "ExamTemplate",
+    "apiKey": "",
+    "apiSecret": ""
+  },
   "Logging": {
     "LogLevel": {
       "Default": "Information",
-- 
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