✨ Account friends overview endpoint

DysonNetwork.Pass/Account/AccountEventService.cs

@@ -478,6 +478,54 @@ public class AccountEventService(
         return activities;
     }
 
+    public async Task<Dictionary<Guid, List<SnPresenceActivity>>> GetActiveActivitiesBatch(List<Guid> userIds)
+    {
+        var results = new Dictionary<Guid, List<SnPresenceActivity>>();
+        var cacheMissUserIds = new List<Guid>();
+
+        // Try to get activities from cache first
+        foreach (var userId in userIds)
+        {
+            var cacheKey = $"{ActivityCacheKey}{userId}";
+            var cachedActivities = await cache.GetAsync<List<SnPresenceActivity>>(cacheKey);
+            if (cachedActivities != null)
+            {
+                results[userId] = cachedActivities;
+            }
+            else
+            {
+                cacheMissUserIds.Add(userId);
+            }
+        }
+
+        // If all activities were found in cache, return early
+        if (cacheMissUserIds.Count == 0) return results;
+
+        // Fetch remaining activities from database in a single query
+        var now = SystemClock.Instance.GetCurrentInstant();
+        var activitiesFromDb = await db.PresenceActivities
+            .Where(e => cacheMissUserIds.Contains(e.AccountId) && e.LeaseExpiresAt > now && e.DeletedAt == null)
+            .ToListAsync();
+
+        // Group activities by user ID and update cache
+        var activitiesByUser = activitiesFromDb
+            .GroupBy(a => a.AccountId)
+            .ToDictionary(g => g.Key, g => g.ToList());
+
+        foreach (var userId in cacheMissUserIds)
+        {
+            var userActivities = activitiesByUser.GetValueOrDefault(userId, new List<SnPresenceActivity>());
+            results[userId] = userActivities;
+            
+            // Update cache for this user
+            var cacheKey = $"{ActivityCacheKey}{userId}";
+            await cache.SetWithGroupsAsync(cacheKey, userActivities, [$"{AccountService.AccountCachePrefix}{userId}"],
+                TimeSpan.FromMinutes(1));
+        }
+
+        return results;
+    }
+
     public async Task<(List<SnPresenceActivity>, int)> GetAllActivities(Guid userId, int offset = 0, int take = 20)
     {
         var query = db.PresenceActivities

DysonNetwork.Pass/Account/FriendsController.cs

@@ -0,0 +1,60 @@
+using DysonNetwork.Shared.Models;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+
+namespace DysonNetwork.Pass.Account;
+
+[ApiController]
+[Route("/api/friends")]
+public class FriendsController(AppDatabase db, RelationshipService rels, AccountEventService events) : ControllerBase
+{
+    public class FriendOverviewItem
+    {
+        public SnAccount Account { get; set; } = null!;
+        public SnAccountStatus Status { get; set; } = null!;
+        public List<SnPresenceActivity> Activities { get; set; } = [];
+    }
+
+    [HttpGet("overview")]
+    [Authorize]
+    public async Task<ActionResult<List<FriendOverviewItem>>> GetOverview()
+    {
+        if (HttpContext.Items["CurrentUser"] is not SnAccount currentUser) return Unauthorized();
+
+        var friendIds = await rels.ListAccountFriends(currentUser);
+        
+        // Fetch data in parallel using batch methods for better performance
+        var accountsTask = db.Accounts
+            .Where(a => friendIds.Contains(a.Id))
+            .Include(a => a.Profile)
+            .ToListAsync();
+            
+        var statusesTask = events.GetStatuses(friendIds);
+        var activitiesTask = events.GetActiveActivitiesBatch(friendIds);
+        
+        // Wait for all data to be fetched
+        await Task.WhenAll(accountsTask, statusesTask, activitiesTask);
+        
+        var accounts = accountsTask.Result;
+        var statuses = statusesTask.Result;
+        var activities = activitiesTask.Result;
+        
+        var result = new List<FriendOverviewItem>();
+        
+        foreach (var account in accounts)
+        {
+            var status = statuses.GetValueOrDefault(account.Id);
+            var accountActivities = activities.GetValueOrDefault(account.Id, []);
+            
+            result.Add(new FriendOverviewItem
+            {
+                Account = account,
+                Status = status ?? new SnAccountStatus { AccountId = account.Id },
+                Activities = accountActivities
+            });
+        }
+        
+        return Ok(result);
+    }
+}