From 2fbca008c777fe49698b1264d9648899bc2eef90 Mon Sep 17 00:00:00 2001
From: scawful <justin.scofield@outlook.com>
Date: Fri, 2 Aug 2024 15:34:49 -0400
Subject: [PATCH] add iOS UIDocumentPicker delegation for the AppDelegate

---
 src/app/core/platform/file_dialog.h  |  5 +--
 src/app/core/platform/file_dialog.mm | 61 ++++++++++++++++++----------
 2 files changed, 42 insertions(+), 24 deletions(-)

diff --git a/src/app/core/platform/file_dialog.h b/src/app/core/platform/file_dialog.h
index 8d7257c2..850faeea 100644
--- a/src/app/core/platform/file_dialog.h
+++ b/src/app/core/platform/file_dialog.h
@@ -50,8 +50,7 @@ class FileDialogWrapper {
 #include <string>
 #include <vector>
 
-#ifdef TARGET_OS_MAC
-// Other kinds of Mac OS
+#if TARGET_OS_MAC == 1
 
 class FileDialogWrapper {
  public:
@@ -63,7 +62,7 @@ class FileDialogWrapper {
       const std::string& folder_path);
 };
 
-#elif TARGET_OS_IPHONE
+#elif TARGET_OS_IPHONE == 1
 
 // iOS
 class FileDialogWrapper {
diff --git a/src/app/core/platform/file_dialog.mm b/src/app/core/platform/file_dialog.mm
index a81a47cb..e73a2fce 100644
--- a/src/app/core/platform/file_dialog.mm
+++ b/src/app/core/platform/file_dialog.mm
@@ -1,8 +1,8 @@
+#include "app/core/platform/file_dialog.h"
 
 #include <string>
 #include <vector>
-
-#include "app/core/platform/file_dialog.h"
+#include "imgui/imgui.h"
 
 #if defined(__APPLE__) && defined(__MACH__)
 /* Apple OSX and iOS (Darwin). */
@@ -10,32 +10,51 @@
 
 #import <CoreText/CoreText.h>
 
-#if TARGET_IPHONE_SIMULATOR == 1
+#if TARGET_IPHONE_SIMULATOR == 1 || TARGET_OS_IPHONE == 1
 /* iOS in Xcode simulator */
-std::string FileDialogWrapper::ShowOpenFileDialog() { return ""; }
+#import <UIKit/UIKit.h>
+#import <UniformTypeIdentifiers/UniformTypeIdentifiers.h>
+
+#include "app/core/platform/app_delegate.h"
+
+namespace {
+static std::string selectedFile;
+
+void ShowOpenFileDialogImpl(void (^completionHandler)(std::string)) {
+  AppDelegate *appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
+  [appDelegate presentDocumentPickerWithCompletionHandler:^(NSString *filePath) {
+    selectedFile = std::string([filePath UTF8String]);
+    completionHandler(selectedFile);
+  }];
+}
+
+std::string ShowOpenFileDialogSync() {
+  __block std::string result;
+  
+  ShowOpenFileDialogImpl(^(std::string filePath) {
+    result = filePath;
+  });
+  
+  // Check if the documentPicker is done 
+//  while (result.empty()) {
+//    [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
+//  }
+
+  return result;
+}
+}
+
+std::string FileDialogWrapper::ShowOpenFileDialog() {
+  return ShowOpenFileDialogSync();
+}
 
 std::string FileDialogWrapper::ShowOpenFolderDialog() { return ""; }
 
-std::vector<std::string> FileDialogWrapper::GetFilesInFolder(const std::string& folder) {
+std::vector<std::string> FileDialogWrapper::GetFilesInFolder(const std::string &folder) {
   return {};
 }
 
-std::vector<std::string> FileDialogWrapper::GetSubdirectoriesInFolder(const std::string& folder) {
-  return {};
-}
-
-#elif TARGET_OS_IPHONE == 1
-/* iOS */
-
-std::string FileDialogWrapper::ShowOpenFileDialog() { return ""; }
-
-std::string FileDialogWrapper::ShowOpenFolderDialog() { return ""; }
-
-std::vector<std::string> FileDialogWrapper::GetFilesInFolder(const std::string& folder) {
-  return {};
-}
-
-std::vector<std::string> FileDialogWrapper::GetSubdirectoriesInFolder(const std::string& folder) {
+std::vector<std::string> FileDialogWrapper::GetSubdirectoriesInFolder(const std::string &folder) {
   return {};
 }