93 lines
3.9 KiB
C#
93 lines
3.9 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.Networking;
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using UnityEngine.UI;
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namespace CommanderAILab.Services
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{
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/// <summary>
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/// Singleton texture cache for card images.
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/// Downloads and caches Scryfall card art as Sprite or Texture2D.
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/// </summary>
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public class ImageCache : MonoBehaviour
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{
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public static ImageCache Instance { get; private set; }
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private readonly Dictionary<string, Sprite> _spriteCache = new();
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private readonly Dictionary<string, Texture2D> _textureCache = new();
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[SerializeField] private int maxCacheSize = 500;
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private void Awake()
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{
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if (Instance != null && Instance != this) { Destroy(gameObject); return; }
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Instance = this;
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DontDestroyOnLoad(gameObject);
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}
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// ── Sprite (existing usage) ───────────────────────────────────────────
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public void GetSprite(string url, Action<Sprite> callback)
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{
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if (string.IsNullOrEmpty(url)) { callback?.Invoke(null); return; }
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if (_spriteCache.TryGetValue(url, out var cached)) { callback?.Invoke(cached); return; }
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StartCoroutine(DownloadSprite(url, callback));
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}
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private IEnumerator DownloadSprite(string url, Action<Sprite> callback)
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{
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using var req = UnityWebRequestTexture.GetTexture(url);
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yield return req.SendWebRequest();
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if (req.result != UnityWebRequest.Result.Success)
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{
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Debug.LogWarning($"[ImageCache] Sprite failed {url}: {req.error}");
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callback?.Invoke(null);
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yield break;
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}
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var tex = DownloadHandlerTexture.GetContent(req);
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var sprite = Sprite.Create(tex, new Rect(0, 0, tex.width, tex.height), Vector2.one * 0.5f);
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if (_spriteCache.Count >= maxCacheSize) _spriteCache.Clear();
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_spriteCache[url] = sprite;
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callback?.Invoke(sprite);
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}
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// ── RawImage / Texture2D (battleground CardView + CommanderZoneWidget) ───
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/// <summary>Load a card image URL directly into a RawImage component.</summary>
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public IEnumerator LoadCard(string url, RawImage target)
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{
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if (target == null || string.IsNullOrEmpty(url)) yield break;
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if (_textureCache.TryGetValue(url, out var cached)) { target.texture = cached; yield break; }
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yield return DownloadTexture(url, tex => { if (target != null) target.texture = tex; });
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}
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/// <summary>
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/// Load Scryfall art_crop into a RawImage by card name.
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/// URL: https://api.scryfall.com/cards/named?exact={name}&format=image&version=art_crop
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/// </summary>
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public IEnumerator LoadArtCrop(string cardName, RawImage target)
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{
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if (target == null || string.IsNullOrEmpty(cardName)) yield break;
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string url = $"https://api.scryfall.com/cards/named?exact={Uri.EscapeDataString(cardName)}&format=image&version=art_crop";
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yield return LoadCard(url, target);
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}
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private IEnumerator DownloadTexture(string url, Action<Texture2D> callback)
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{
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using var req = UnityWebRequestTexture.GetTexture(url);
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yield return req.SendWebRequest();
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if (req.result != UnityWebRequest.Result.Success)
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{
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Debug.LogWarning($"[ImageCache] Texture failed {url}: {req.error}");
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callback?.Invoke(null);
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yield break;
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}
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var tex = DownloadHandlerTexture.GetContent(req);
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if (_textureCache.Count >= maxCacheSize) _textureCache.Clear();
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_textureCache[url] = tex;
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callback?.Invoke(tex);
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}
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public void ClearCache() { _spriteCache.Clear(); _textureCache.Clear(); }
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}
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}
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