Create Class library and Web API

.gitignore

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+.idea

class-library/.gitignore

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+obj
+bin

class-library/Chat.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace class_library;
+
+public class Chat
+{
+    [Key]
+    public int Id { get; set; }
+    [Required]
+    public  ICollection<User> Members { get; set; }
+    [Required]
+    public ICollection<Message> Messages { get; set; }
+}

class-library/Invitation.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace class_library;
+
+public class Invitation
+{
+    [Required]
+    public string From { get; set; }
+    [Required]
+    public string To { get; set; }
+    [Required]
+    public string Server { get; set; }
+}

class-library/Message.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace class_library;
+
+public class Message
+{
+    [Key]
+    public int Id { get; set; }
+    [Required]
+    public string Sender { get; set; }
+    [Required]
+    public string Text { get; set; }
+    [Required]
+    public DateTime Timestamp { get; set; }
+    [Required]
+    public string type { get; set; }
+}

class-library/Transfer.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace class_library;
+
+public class Transfer
+{
+    [Required]
+    public string From { get; set; }
+    [Required]
+    public string To { get; set; }
+    [Required]
+    public string Content { get; set; }
+}

class-library/User.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace class_library;
+
+public class User
+{
+    // Username must contain only letters, numbers, and hyphens
+    [Key, RegularExpression(@"^[a-zA-Z0-9-]+$")]
+    // Username must be at least 3 characters long
+    [MinLength(3)]
+    public string Username { get; set; }
+
+    [Required]
+    // Password must be at least 6 characters long
+    [MinLength(6)]
+    // Password must contain at least one number, one lowercase and one uppercase character
+    [RegularExpression(@"^(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,}$")]
+    public string Password { get; set; }
+
+    [Required]
+    // Display name must be at least 3 characters long
+    [MinLength(3)]
+    // Display name can only contain letters, spaces, hyphens, periods, dots, and commas
+    [RegularExpression(@"^[a-zA-Z0-9- .,]+$")]
+    public string Name { get; set; }
+
+    [Required]
+    public string ProfilePicture { get; set; }
+
+    [Required]
+    public string Server { get; set; }
+
+    // Dictionary of User Id's as keys and chats as values
+    public IDictionary<string, Chat> Chats { get; set; }
+
+    // Dictionary of Chat Id's as keys and number of unread messages as values
+    public IDictionary<int, int> UnreadMessages { get; set; }
+}

class-library/class-library.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net6.0</TargetFramework>
+        <RootNamespace>class_library</RootNamespace>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>

web-api/.gitignore

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+bin/
+obj/

web-api/Controllers/ContactsController.cs

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+using Microsoft.AspNetCore.Mvc;
+using class_library;
+
+namespace web_api.Controllers;
+
+[ApiController]
+[Route("api/contacts")]
+
+public class ContactsController : ControllerBase
+{
+    // private readonly IUsersRepository _contactRepository;
+
+    // public ContactsController(IUsersRepository contactRepository)
+    // {
+    //     _contactRepository = contactRepository;
+    // }
+
+    [HttpGet]
+    public IActionResult Get()
+    {
+        // return Ok(_contactRepository.GetAll());
+        return Ok("All Contacts of current user");
+    }
+
+    [HttpPost]
+    public IActionResult Post([FromBody] User contact)
+    {
+        // if (contact == null)
+        // {
+        //     return BadRequest();
+        // }
+        // _contactRepository.Add(contact);
+        // return CreatedAtAction("Get", new { id = contact.Id }, contact);
+        return Ok("Create new Contact");
+    }
+
+    [HttpGet("{id}")]
+    public IActionResult Get(int id)
+    {
+        // var contact = _contactRepository.GetById(id);
+        // if (contact == null)
+        // {
+        //     return NotFound();
+        // }
+        // return Ok(contact);
+        return Ok("Get Contact with id: " + id);
+    }
+
+    [HttpPut("{id}")]
+    public IActionResult Put(int id, [FromBody] User contact)
+    {
+        // if (contact == null || contact.Id != id)
+        // {
+        //     return BadRequest();
+        // }
+        // var contactToUpdate = _contactRepository.GetById(id);
+        // if (contactToUpdate == null)
+        // {
+        //     return NotFound();
+        // }
+        // _contactRepository.Update(contactToUpdate, contact);
+        // return NoContent();
+        return Ok("Update Contact with id: " + id);
+    }
+
+    [HttpDelete("{id}")]
+    public IActionResult Delete(int id)
+    {
+        return Ok("Delete Contact with id: " + id);
+    }
+
+    [HttpGet("{id}/messages")]
+    public IActionResult GetMessages(int id)
+    {
+        return Ok("Get Messages of Contact with id: " + id);
+    }
+    [HttpPost("{id}/messages")]
+    public IActionResult PostNewMessage(int id, [FromBody] Message message)
+    {
+        return Ok("Create new Message sent to Contact with id: " + id);
+    }
+
+    [HttpGet("{id}/messages/{id2}")]
+    public IActionResult GetMessage(int id, int id2)
+    {
+        return Ok("Get Message with id: " + id2 + " sent to Contact with id: " + id);
+    }
+    [HttpPut("{id}/messages/{id2}")]
+    public IActionResult PutMessage(int id, int id2, [FromBody] Message message)
+    {
+        return Ok("Update Message with id: " + id2 + " sent to Contact with id: " + id);
+    }
+    [HttpDelete("{id}/messages/{id2}")]
+    public IActionResult DeleteMessage(int id, int id2)
+    {
+        return Ok("Delete Message with id: " + id2 + " sent to Contact with id: " + id);
+    }
+}

web-api/Controllers/InvitationController.cs

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+using Microsoft.AspNetCore.Mvc;
+using class_library;
+
+namespace web_api.Controllers;
+
+[ApiController]
+[Route("api/invitations")]
+
+public class InvitationController : ControllerBase
+{
+    [HttpPost]
+    public IActionResult Post([FromBody] Invitation invitation)
+    {
+        return Ok("Create new Invitation");
+    }
+}

web-api/Controllers/TransferController.cs

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+using Microsoft.AspNetCore.Mvc;
+using class_library;
+
+namespace web_api.Controllers;
+
+[ApiController]
+[Route("api/transfer")]
+
+public class TransferController : ControllerBase
+{
+    [HttpPost]
+    public IActionResult Post([FromBody] Transfer transfer)
+    {
+        return Ok("Transfer new message to user on a remote server");
+    }
+}

web-api/Program.cs

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+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+
+builder.Services.AddControllers();
+// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseHttpsRedirection();
+
+app.UseAuthorization();
+
+app.MapControllers();
+
+app.Run();

web-api/Properties/launchSettings.json

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+{
+  "$schema": "https://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:28545",
+      "sslPort": 44341
+    }
+  },
+  "profiles": {
+    "web_api": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "applicationUrl": "https://localhost:7090;http://localhost:5295",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

web-api/appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

web-api/appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}

web-api/web-api.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+    <PropertyGroup>
+        <TargetFramework>net6.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <RootNamespace>web_api</RootNamespace>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Swashbuckle.AspNetCore" Version="6.2.3" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\class-library\class-library.csproj" />
+    </ItemGroup>
+
+</Project>