Hack MFMailComposeViewController because I really really want it to work

App/Hacks/MFMailComposeViewControllerFix.m

@@ -0,0 +1,33 @@
+//
+//  MFMailComposeViewControllerFix.c
+//  App
+//
+//  Created by James Magahern on 5/25/21.
+//
+
+#import <CoreFoundation/CoreFoundation.h>
+#import <MessageUI/MessageUI.h>
+#import <objc/runtime.h>
+
+@interface MFMailComposeViewController (InternalMethods)
++ (BOOL)canSendMailSourceAccountManagement:(NSInteger)sourceAccountManagement;
+@end
+
+static void swizzleClassMethod(Class targetClass, SEL originalSelector, IMP replacementIMP)
+{
+    Method originalMethod = class_getClassMethod(targetClass, originalSelector);
+    method_setImplementation(originalMethod, replacementIMP);
+}
+
+__attribute__((constructor))
+static void swizzleMFMailComposeViewController()
+{
+    // Hacks to work around the fact that MFMailComposeViewController is broken in iOS 14+
+    swizzleClassMethod(MFMailComposeViewController.class, @selector(canSendMail), imp_implementationWithBlock(^BOOL(void) {
+        return YES;
+    }));
+    
+    swizzleClassMethod(MFMailComposeViewController.class, @selector(canSendMailSourceAccountManagement:), imp_implementationWithBlock(^BOOL(NSInteger sam) {
+        return YES;
+    }));
+}