Adding plist property 'FirebaseDeepLinkPasteboardRetrievalEnabled' (#5946)

Adding plist property "FirebaseDeepLinkPasteboardRetrievalEnabled" to enable/disable fetching dynamic links from Pasteboard.

Author: eldhosembabu

FirebaseDynamicLinks/CHANGELOG.md

@@ -1,7 +1,6 @@
-# Unversioned
+# v4.2.0
+- [Added] Plist property `FirebaseDeepLinkPasteboardRetrievalEnabled` to enable/disable fetching dynamic links from Pasteboard.
 - [fixed] Reduce frequency of iOS14 pasteboard notifications by only reading from it when it contains URL(s). (#5905)
-
-# v4.3.0
 - [changed] Functionally neutral updated import references for dependencies. (#5824)
 
 # v4.1.0

FirebaseDynamicLinks/Sources/FIRDLDefaultRetrievalProcessV2.m

@@ -297,6 +297,11 @@ - (nullable NSURL *)uniqueMatchLinkToCheck {
 }
 
 - (NSString *)retrievePasteboardContents {
+  if (![self isPasteboardRetrievalEnabled]) {
+    // Pasteboard check for dynamic link is disabled by user.
+    return @"";
+  }
+
   NSString *pasteboardContents = @"";
   if (@available(iOS 10.0, *)) {
     if ([[UIPasteboard generalPasteboard] hasURLs]) {
@@ -308,6 +313,21 @@ - (NSString *)retrievePasteboardContents {
   return pasteboardContents;
 }
 
+/**
+ Property to enable or disable dynamic link retrieval from Pasteboard.
+ This property is added because of iOS 14 feature where pop up is displayed while accessing
+ Pasteboard. So if developers don't want their users to see the Pasteboard popup, they can set
+ "FirebaseDeepLinkPasteboardRetrievalEnabled" to false in their plist.
+ */
+- (BOOL)isPasteboardRetrievalEnabled {
+  id retrievalEnabledValue =
+      [[NSBundle mainBundle] infoDictionary][@"FirebaseDeepLinkPasteboardRetrievalEnabled"];
+  if ([retrievalEnabledValue respondsToSelector:@selector(boolValue)]) {
+    return [retrievalEnabledValue boolValue];
+  }
+  return YES;
+}
+
 - (void)clearUsedUniqueMatchLinkToCheckFromClipboard {
   // See discussion in b/65304652
   // We will clear clipboard after we used the unique match link from the clipboard