implement buddy codes

src/Controllers/Common/ContentController.cs

@@ -1159,6 +1159,31 @@ public class ContentController : Controller {
         else return Ok(new BuddyActionResult{ Result = BuddyActionResultType.InvalidFriendCode });
     }
 
+    [HttpPost]
+    [Produces("application/xml")]
+    [Route("ContentWebService.asmx/AddBuddyByFriendCode")]
+    [VikingSession]
+    public IActionResult AddBuddyByFriendCode(Viking viking, [FromForm] string friendCode, [FromForm] string apiKey)
+    {
+        // make sure viking doesn't add self as buddy
+        if (viking.BuddyCode != null && viking.BuddyCode == friendCode) return Ok(new BuddyActionResult{ Result = BuddyActionResultType.CannotAddSelf });
+
+        // find viking
+        Viking? buddyViking = ctx.Vikings.FirstOrDefault(e => e.BuddyCode == friendCode);
+
+        if (buddyViking != null)
+        {
+            uint gameVersion = ClientVersion.GetVersion(apiKey);
+            // check if game clients are different
+            if (
+            (buddyViking.GameVersion != gameVersion) &&
+            !(buddyViking.GameVersion >= ClientVersion.Min_SoD && gameVersion >= ClientVersion.Min_SoD) &&
+            !(buddyViking.GameVersion >= ClientVersion.WoJS && gameVersion >= ClientVersion.WoJS && buddyViking.GameVersion < ClientVersion.WoJS_NewAvatar && gameVersion < ClientVersion.WoJS_NewAvatar)
+            ) return Ok(new BuddyActionResult { Result = BuddyActionResultType.InvalidFriendCode });
+            else return Ok(buddyService.CreateBuddyRelation(viking, buddyViking));
+        } else return Ok(new BuddyActionResult{ Result = BuddyActionResultType.InvalidFriendCode });
+    }
+
     [HttpPost]
     [Produces("application/xml")]
     [Route("ContentWebService.asmx/RemoveBuddy")]
@@ -1209,6 +1234,17 @@ public class ContentController : Controller {
         return Ok(buddyService.ConstructBuddyList(viking));
     }
 
+    [HttpPost]
+    [Produces("application/xml")]
+    [Route("ContentWebService.asmx/GetFriendCode")]
+    public IActionResult GetFriendCode([FromForm] Guid userId)
+    {
+        Viking? viking = ctx.Vikings.FirstOrDefault(e => e.Uid == userId);
+
+        if (viking == null) return NotFound();
+        else return Ok(buddyService.GetOrSetBuddyCode(viking));
+    }
+
     [HttpPost]
     [Produces("application/xml")]
     [Route("/ContentWebService.asmx/RedeemMysteryBoxItems")]

src/Migrations/20250308012001_Viking_BuddyCode.cs

@@ -0,0 +1,28 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace sodoff.Migrations
+{
+    /// <inheritdoc />
+    public partial class Viking_BuddyCode : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "BuddyCode",
+                table: "Vikings",
+                type: "TEXT",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "BuddyCode",
+                table: "Vikings");
+        }
+    }
+}

src/Migrations/DBContextModelSnapshot.cs

@@ -817,6 +817,9 @@ namespace sodoff.Migrations
                     b.Property<DateTime?>("BirthDate")
                         .HasColumnType("TEXT");
 
+                    b.Property<string>("BuddyCode")
+                        .HasColumnType("TEXT");
+
                     b.Property<DateTime?>("CreationDate")
                         .HasColumnType("TEXT");
 

src/Model/Viking.cs

@@ -19,6 +19,8 @@ public class Viking {
 
     public string? AvatarSerialized { get; set; }
 
+    public string? BuddyCode { get; set; }
+
     public int? SelectedDragonId { get; set; }
 
     public virtual ICollection<Session> Sessions { get; set; } = null!;

src/Services/BuddyService.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Data;
+using System.Security;
 using sodoff.Model;
 using sodoff.Schema;
 using sodoff.Util;
@@ -8,8 +9,12 @@ namespace sodoff.Services;
 
 public class BuddyService
 {
+    private char[] BuddyCodeCharacterList = new char[] 
+        { 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','1','2','3','4','5','6','7','8','9','0' };
+
     private readonly DBContext ctx;
     private readonly MessagingService messagingService;
+
     public BuddyService(DBContext ctx, MessagingService messagingService)
     {
         this.ctx = ctx;
@@ -95,6 +100,31 @@ public class BuddyService
         } else return false;
     }
 
+    public string GetOrSetBuddyCode(Viking viking)
+    {
+        if (viking.BuddyCode != null) return viking.BuddyCode;
+        else
+        {
+            // generate a buddy code and set it
+            Random rnd = new Random();
+            string code = "";
+            do
+            {
+                for( int i = 0; i < 5; i++ )
+                {
+                    code += BuddyCodeCharacterList[rnd.Next(0, BuddyCodeCharacterList.Length)];
+                }
+            } while (ctx.Vikings.FirstOrDefault(e => e.BuddyCode == code) != null);
+
+            // set code on viking
+            viking.BuddyCode = code;
+            ctx.SaveChanges();
+
+            // return it
+            return viking.BuddyCode;
+        }
+    }
+
     public bool RemoveBuddy(Viking viking, Viking buddyViking)
     {
         // find relation