Build typed Aetheria client surfaces

Assets/Scripts/Gameplay/AetheriaUnityObservedTargetQuery.cs

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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+using System;
+using System.Linq;
+using GameCult.Aetheria.State.Verse;
+
+public sealed class AetheriaUnityObservedTargetQuery
+{
+    private readonly Func<AetheriaClient> _resolveClient;
+    private readonly AetheriaUnityObservedFacadeIndex _facadeIndex;
+
+    public AetheriaUnityObservedTargetQuery(
+        Func<AetheriaClient> resolveClient,
+        AetheriaUnityObservedFacadeIndex facadeIndex)
+    {
+        _resolveClient = resolveClient ?? (() => null);
+        _facadeIndex = facadeIndex ?? throw new ArgumentNullException(nameof(facadeIndex));
+    }
+
+    public Entity GetObservedTarget(Entity observer)
+    {
+        if (TryQueryEntityTarget(observer, out var targetEntityIndex) &&
+            _facadeIndex.TryResolveEntityByDaemonIndex(targetEntityIndex, out var targetEntity))
+        {
+            return targetEntity;
+        }
+
+        return null;
+    }
+
+    public float GetObservedInfoGathered(Entity observer, Entity target)
+    {
+        return TryQueryEntityContact(observer, target, out var contact)
+            ? (float)contact.InfoGathered
+            : 0f;
+    }
+
+    public bool IsObservedHostileContact(Entity observer, Entity target)
+    {
+        return TryQueryEntityContact(observer, target, out var contact) && contact.Hostile;
+    }
+
+    public AetheriaRuntimeZoneContactRow[] GetObservedVisibleContacts(
+        Entity observer,
+        double minimumInfoGathered,
+        bool visibleOnly)
+    {
+        var contacts = ReadZoneContacts();
+        if (observer == null || contacts == null)
+            return Array.Empty<AetheriaRuntimeZoneContactRow>();
+
+        return (contacts.Contacts ?? Array.Empty<AetheriaRuntimeZoneContactRow>())
+            .Where(contact =>
+                contact.ObserverEntityIndex == observer.DaemonEntityIndex &&
+                contact.InfoGathered > minimumInfoGathered &&
+                (!visibleOnly || contact.Visible))
+            .ToArray();
+    }
+
+    private bool TryQueryEntityContact(
+        Entity observer,
+        Entity target,
+        out AetheriaRuntimeZoneContactRow contact)
+    {
+        contact = default;
+        if (observer == null || target == null)
+            return false;
+
+        contact = (ReadZoneContacts()?.Contacts ?? Array.Empty<AetheriaRuntimeZoneContactRow>())
+            .FirstOrDefault(row =>
+                row.ObserverEntityIndex == observer.DaemonEntityIndex &&
+                row.TargetEntityIndex == target.DaemonEntityIndex);
+        return contact != null;
+    }
+
+    private bool TryQueryEntityTarget(
+        Entity observer,
+        out int targetEntityIndex)
+    {
+        targetEntityIndex = -1;
+        if (observer == null)
+            return false;
+
+        targetEntityIndex = (ReadZoneContacts()?.Targets ?? Array.Empty<AetheriaRuntimeZoneTargetRow>())
+            .FirstOrDefault(row => row.EntityIndex == observer.DaemonEntityIndex)
+            ?.TargetEntityIndex ?? -1;
+        return targetEntityIndex >= 0;
+    }
+
+    private AetheriaRuntimeZoneContactsDocument ReadZoneContacts()
+    {
+        try
+        {
+            return _resolveClient()?.ZoneContactsAsync().GetAwaiter().GetResult();
+        }
+        catch
+        {
+            return null;
+        }
+    }
+}