Add project files.

OpenU.Api.Tests/OpenU.Api.Tests.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="nunit" Version="3.12.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0"/>
+  </ItemGroup>
+
+</Project>

OpenU.Api.Tests/UnitTest1.cs

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+using NUnit.Framework;
+
+namespace OpenU.Api.Tests
+{
+    public class Tests
+    {
+        [SetUp]
+        public void Setup()
+        {
+        }
+
+        [Test]
+        public void Test1()
+        {
+            Assert.Pass();
+        }
+    }
+}

OpenU.Api.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30330.147
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenU.Api", "OpenU.Api\OpenU.Api.csproj", "{A3648F04-249F-4BFF-B233-060BB107383E}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenU.Api.Tests", "OpenU.Api.Tests\OpenU.Api.Tests.csproj", "{8005C4B7-383E-40AB-AC60-5E1BAFBE78C2}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{A3648F04-249F-4BFF-B233-060BB107383E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A3648F04-249F-4BFF-B233-060BB107383E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A3648F04-249F-4BFF-B233-060BB107383E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A3648F04-249F-4BFF-B233-060BB107383E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8005C4B7-383E-40AB-AC60-5E1BAFBE78C2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8005C4B7-383E-40AB-AC60-5E1BAFBE78C2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8005C4B7-383E-40AB-AC60-5E1BAFBE78C2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8005C4B7-383E-40AB-AC60-5E1BAFBE78C2}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {729680F8-FBCB-439B-B734-2A64E3438173}
+	EndGlobalSection
+EndGlobal

OpenU.Api/OpenU.Api.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <PackageId>Openu.Api</PackageId>
+    <Version>1.0.0</Version>
+    <Authors>Aviv Naaman</Authors>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
+  </ItemGroup>
+
+</Project>

OpenU.Api/OpenuAbout.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OpenU.Api
+{
+    class OpenuAbout
+    {
+        public string ActivityHours { get; set; }
+        public string Phone { get; set; }
+        public string Email { get; set; }
+        public string Address { get; set; }
+        public int PostalAddress { get; set; }
+        public int PostalCode { get; set; }
+    }
+}

OpenU.Api/OpenuActivity.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OpenU.Api
+{
+    public class OpenuActivity
+    {
+        public int? Id { get; set; }
+        public DateTime Date { get; set; }
+        public string Name { get; set; }
+        public string Semester { get; set; }
+        public int? Course { get; set; }
+        public string StudyCenter { get; set; }
+    }
+}

OpenU.Api/OpenuApi.cs

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+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Threading.Tasks;
+using Newtonsoft.Json;
+
+namespace OpenU.Api
+{
+    public class OpenUApi : IDisposable
+    {
+        public OpenuCredentials Credentials { get; set; }
+        public bool IsAuthenticated
+        {
+            get
+            {
+                return !String.IsNullOrWhiteSpace(token);
+            }
+        }
+
+        private HttpClient httpClient;
+        private string token;
+
+        const string ApiBaseUrl = "https://sheilta.apps.openu.ac.il/Main/api/MobileApi";
+
+        public OpenUApi(OpenuCredentials credentials)
+        {
+            Credentials = credentials;
+            httpClient = new HttpClient();
+        }
+
+        public async Task<OpenuLoginResult> AuthenticateAsync()
+        {
+            if (Credentials == null) throw new NullReferenceException("Credentials cannot be null");
+
+            var data = new Dictionary<string, string>()
+            {
+                {"username", Credentials.UserName },
+                {"studentId", Credentials.IdNumber },
+                {"password", Credentials.Password },
+                {"deviceId", "undefined" },
+            };
+            var httpResponse = await httpClient.PostAsync(ApiBaseUrl + "/Login", new FormUrlEncodedContent(data));
+
+            var result = JsonConvert.DeserializeObject<OpenuLoginResult>(await httpResponse.Content.ReadAsStringAsync());
+            if (result.Status == LoginStatus.Success)
+            {
+                token = result.Token.Substring(4); // cut "sso " prefix of token from server
+                httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("sso", token); // add token to http client auth header
+            }
+            return result;
+        }
+
+        public void Logout()
+        {
+            token = null;
+            httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(""); // remove auth header
+        }
+
+        public async Task<List<OpenuCourseListEntry>> GetCoursesAsync()
+        {
+            if (!IsAuthenticated) throw new InvalidOperationException("Autentication is required for this action.");
+
+            var httpResponse = await httpClient.GetAsync(ApiBaseUrl + "/Courses");
+            return JsonConvert.DeserializeObject<List<OpenuCourseListEntry>>(await httpResponse.Content.ReadAsStringAsync());
+        }
+
+
+
+        public async Task<OpenuCourseDetails> GetCourseDetailsAsync(string courseId, string semester)
+        {
+            if (!IsAuthenticated) throw new InvalidOperationException("Autentication is required for this action.");
+
+
+            var data = new Dictionary<string, string>()
+            {
+                {"id", courseId },
+                {"semester", semester },
+            };
+            var httpResponse = await httpClient.PostAsync(ApiBaseUrl + "/CourseDetails", new FormUrlEncodedContent(data));
+            return JsonConvert.DeserializeObject<OpenuCourseDetails>(await httpResponse.Content.ReadAsStringAsync());
+        }
+
+        public async Task<List<OpenuMessage>> GetMessagesAsync()
+        {
+            if (!IsAuthenticated) throw new InvalidOperationException("Autentication is required for this action.");
+
+            var httpResponse = await httpClient.GetAsync(ApiBaseUrl + "/Messages");
+            return JsonConvert.DeserializeObject<List<OpenuMessage>>(await httpResponse.Content.ReadAsStringAsync());
+        }
+
+        public async Task<List<OpenuActivity>> GetActivitiesAsync()
+        {
+            if (!IsAuthenticated) throw new InvalidOperationException("Autentication is required for this action.");
+
+            var httpResponse = await httpClient.GetAsync(ApiBaseUrl + "/Activities");
+            return JsonConvert.DeserializeObject<List<OpenuActivity>>(await httpResponse.Content.ReadAsStringAsync());
+        }
+
+        public void Dispose()
+        {
+            Logout();
+            httpClient.Dispose();
+        }
+
+    }
+}

OpenU.Api/OpenuCourseDetails.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OpenU.Api
+{
+    public class OpenuCourseDetails
+    {
+        public OpenuCourseInformation CourseInformation { get; set; }
+        public OpenuGroupDetails GroupDetails { get; set; }
+        public List<OpenuTask> Tasks { get; set; }
+    }
+    public class OpenuCourseInformation
+    {
+        public OpenuCourseTutor Tutor { get; set; }
+        public OpenuCourseCoordinator Coordinator { get; set; }
+        public string DepartmentName { get; set; }
+        public OpenuCourseStateInfo State { get; set; }
+    }
+
+    public class OpenuTask {
+        public int Number { get; set; }
+        public string Description { get; set; }
+        public DateTime ExamDate { get; set; }
+        public int Weight { get; set; }
+        public string Mark { get; set; }
+        public string ValidityDescription { get; set; }
+        public string Validity { get; set; }
+        public DateTime UpdateDate { get; set; }
+    }
+
+    public class OpenuGroupDetails
+    {
+        public int StudyGroupID { get; set; }
+        public string InstructionType { get; set; }
+        public string MeetingDaysAndHours { get; set; }
+        public List<OpenuMeeting> Meetings { get; set; }
+        public OpenuStudyCenter StudyCenter { get; set; }
+    }
+
+    public class OpenuStudyCenter
+    {
+        public int Id { get; set; }
+        public string Description { get; set; }
+        public string Address { get; set; }
+        public string Phone { get; set; }
+        public string ActivityDays { get; set; }
+
+    }
+
+    public class OpenuCourseTutor
+    {
+        public string Name { get; set; }
+        public string Phone { get; set; }
+        public string Times { get; set; }
+        public string Address { get; set; }
+    }
+
+    public class OpenuCourseCoordinator
+    {
+        public string Name { get; set; }
+        public string Phone { get; set; }
+        public string GuidanceTimes { get; set; }
+        public string SecretaryName { get; set; }
+        public string SecretaryPhone { get; set; }
+
+    }
+
+    public class OpenuCourseStateInfo
+    {
+        public string StateDescription { get; set; }
+        public int? Score { get; set; }
+        public int? FinalScore { get; set; }
+        public int? WeightedScore { get; set; }
+    }
+
+    public class OpenuMeeting
+    {
+        public int Id { get; set; }
+        public char Day { get; set; }
+        public DateTime? Date { get; set; }
+        public string Hours { get; set; }
+        public string Type { get; set; }
+        public string Location { get; set; }
+        public string Comment { get; set; }
+    }
+    public class OpenuPayment
+    {
+        public int Seq { get; set; }
+        public int Description { get; set; }
+        public string Type { get; set; }
+        public int Amount { get; set; }
+        public DateTime RecordDate { get; set; }
+        public int PaymentNumber { get; set; }
+        public DateTime PaymentBegins { get; set; }
+        public int? CreditNumber { get; set; }
+        public string Pays { get; set; }
+    }
+}

OpenU.Api/OpenuCourseListEntry.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OpenU.Api
+{
+    public class OpenuCourseListEntry
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public string Semester { get; set; }
+        public string StudyCenter { get; set; }
+        public string Group { get; set; }
+        public CourseType CourseType { get; set; }
+    }
+
+    public enum CourseType
+    {
+
+    }
+}

OpenU.Api/OpenuCredentials.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OpenU.Api
+{
+    public class OpenuCredentials
+    {
+        public OpenuCredentials(string username, string password, string idNumber)
+        {
+            UserName = username;
+            Password = password;
+            IdNumber = idNumber;
+        }
+
+        public string UserName { get; set; }
+        public string Password { get; set; }
+        public string IdNumber { get; set; }
+    }
+}

OpenU.Api/OpenuLoginResult.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OpenU.Api
+{
+    public class OpenuLoginResult
+    {
+        public string Token { get; set; }
+        public string Message { get; set; }
+        public LoginStatus Status { get; set; }
+    }
+
+    public enum LoginStatus
+    {
+        Success = 1,
+        Failure = 0
+    }
+}