From 75ee4f18e94b70dc12cf691ddee93fe46c6307d9 Mon Sep 17 00:00:00 2001
From: Leko Murphy <lekomurphy@gmail.com>
Date: Sat, 18 Feb 2023 18:42:54 -0600
Subject: [PATCH] fetch assets off main thread

---
 Source/Pages/Gallery/YPLibraryVC.swift | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/Source/Pages/Gallery/YPLibraryVC.swift b/Source/Pages/Gallery/YPLibraryVC.swift
index 53b5451f1..898c95e87 100644
--- a/Source/Pages/Gallery/YPLibraryVC.swift
+++ b/Source/Pages/Gallery/YPLibraryVC.swift
@@ -228,15 +228,25 @@ internal final class YPLibraryVC: UIViewController, YPPermissionCheckable {
         }
     }
     
-    func refreshMediaRequest() {
-        let options = buildPHFetchOptions()
+    private func refreshMediaRequest() {
+        
+        // calls to fetchAssets can take a while for large libraries and we don't want to block the main thread
+        DispatchQueue.global().async {
+            let options = self.buildPHFetchOptions()
 
-        if let collection = mediaManager.collection {
-            mediaManager.fetchResult = PHAsset.fetchAssets(in: collection, options: options)
-        } else {
-            mediaManager.fetchResult = PHAsset.fetchAssets(with: options)
+            if let collection = self.mediaManager.collection {
+                self.mediaManager.fetchResult = PHAsset.fetchAssets(in: collection, options: options)
+            } else {
+                self.mediaManager.fetchResult = PHAsset.fetchAssets(with: options)
+            }
+            
+            DispatchQueue.main.async {
+                self.refreshMediaRequestAfterFetch()
+            }
         }
-        
+    }
+    
+    private func refreshMediaRequestAfterFetch() {
         if mediaManager.hasResultItems,
         let firstAsset = mediaManager.getAsset(at: 0) {
             changeAsset(firstAsset)