From 0211bdc7d3b4e88c1491f2d6293e15ee17d08275 Mon Sep 17 00:00:00 2001
From: Alex Zolotarev <deathbaba@gmail.com>
Date: Fri, 5 Aug 2011 15:31:02 +0200
Subject: [PATCH] [ios] Closes #213 - warning dialog if no free space is
 available on the device

---
 iphone/Common/DiskFreeSpace.h                 | 19 ++++++++++++++
 iphone/Maps/Maps.xcodeproj/project.pbxproj    |  2 ++
 .../Maps/Settings/CountriesViewController.mm  | 25 +++++++++++++++----
 3 files changed, 41 insertions(+), 5 deletions(-)
 create mode 100644 iphone/Common/DiskFreeSpace.h

diff --git a/iphone/Common/DiskFreeSpace.h b/iphone/Common/DiskFreeSpace.h
new file mode 100644
index 0000000000..51c8ff425a
--- /dev/null
+++ b/iphone/Common/DiskFreeSpace.h
@@ -0,0 +1,19 @@
+#pragma once
+
+uint64_t FreeDiskSpaceInBytes()
+{
+  NSError * error = nil;
+  NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
+  NSDictionary * dictionary = [[NSFileManager defaultManager] attributesOfFileSystemForPath:[paths lastObject] error: &error];
+  
+  if (dictionary)
+  {
+    NSNumber * freeFileSystemSizeInBytes = [dictionary objectForKey: NSFileSystemFreeSize];
+    return [freeFileSystemSizeInBytes longLongValue];
+  }
+  else
+  {
+    NSLog(@"Error Obtaining Free File System Info: Domain = %@, Code = %@", [error domain], [error code]);
+    return 0;
+  }
+}
diff --git a/iphone/Maps/Maps.xcodeproj/project.pbxproj b/iphone/Maps/Maps.xcodeproj/project.pbxproj
index a4d469d462..e5b42ccbe3 100644
--- a/iphone/Maps/Maps.xcodeproj/project.pbxproj
+++ b/iphone/Maps/Maps.xcodeproj/project.pbxproj
@@ -187,6 +187,7 @@
 		FA500587128907F0002961F0 /* visibility.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = visibility.txt; path = ../../data/visibility.txt; sourceTree = SOURCE_ROOT; };
 		FA87151A12B1518F00592DAF /* SystemConfiguration.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = SystemConfiguration.framework; path = System/Library/Frameworks/SystemConfiguration.framework; sourceTree = SDKROOT; };
 		FA8F8937132D5DB00048E3FE /* libtomcrypt.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = libtomcrypt.a; sourceTree = SOURCE_ROOT; };
+		FAA4B13E13EC1C8C00BCAB63 /* DiskFreeSpace.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = DiskFreeSpace.h; sourceTree = "<group>"; };
 		FAAE8D5D1338FF8B003ECAD5 /* GetActiveConnectionType.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = GetActiveConnectionType.h; sourceTree = "<group>"; };
 		FAAFD696139D9BE2000AE70C /* categories.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = categories.txt; path = ../../data/categories.txt; sourceTree = SOURCE_ROOT; };
 		FAAFD698139D9C6B000AE70C /* libsearch.a */ = {isa = PBXFileReference; lastKnownFileType = archive.ar; path = libsearch.a; sourceTree = SOURCE_ROOT; };
@@ -431,6 +432,7 @@
 				FA34BEC81338D72F00FFB2A7 /* CustomAlertView.mm */,
 				FA34BEC91338D72F00FFB2A7 /* CustomAlertView.h */,
 				FAAE8D5D1338FF8B003ECAD5 /* GetActiveConnectionType.h */,
+				FAA4B13E13EC1C8C00BCAB63 /* DiskFreeSpace.h */,
 			);
 			name = Common;
 			path = ../Common;
diff --git a/iphone/Maps/Settings/CountriesViewController.mm b/iphone/Maps/Settings/CountriesViewController.mm
index b15aac9264..d0d896085a 100644
--- a/iphone/Maps/Settings/CountriesViewController.mm
+++ b/iphone/Maps/Settings/CountriesViewController.mm
@@ -4,6 +4,7 @@
 #import "MapViewController.h"
 #import "WebViewController.h"
 #import "CustomAlertView.h"
+#import "DiskFreeSpace.h"
 
 #include "GetActiveConnectionType.h"
 #include "IPhonePlatform.hpp"
@@ -289,9 +290,25 @@ TIndex g_clickedIndex;
     		[popupQuery release];
     	}
   		break;
-  		case ENotDownloaded:
-  		case EDownloadFailed:
-  		{
+      case ENotDownloaded:
+      case EDownloadFailed:
+      {
+        TLocalAndRemoteSize sizePair = m_storage->CountrySizeInBytes(g_clickedIndex);
+        TLocalAndRemoteSize::first_type size = sizePair.second - sizePair.first;
+
+        // check for disk free space first
+        if (FreeDiskSpaceInBytes() < (size + 1024*1024))
+        { // display warning dialog about not enough free disk space
+          CustomAlertView * alert = [[CustomAlertView alloc] initWithTitle:@"There is not enough free disk space"
+                                                                   message:[NSString stringWithFormat:@"Please, free some space on your device first to download %@", countryName] 
+                                                                  delegate:nil
+                                                         cancelButtonTitle:@"OK"
+                                                         otherButtonTitles:nil];
+          [alert show];
+          [alert release];
+          break;
+        }
+
         TActiveConnectionType connType = GetActiveConnectionType();
         if (connType == ENotConnected)
         { // do not initiate any download
@@ -306,8 +323,6 @@ TIndex g_clickedIndex;
         }
         else
         {
-          TLocalAndRemoteSize sizePair = m_storage->CountrySizeInBytes(g_clickedIndex);
-          TLocalAndRemoteSize::first_type size = sizePair.second - sizePair.first;
           if (connType == EConnectedBy3G && size > MAX_3G_MEGABYTES * MB)
           { // If user uses 3G, do not allow him to download large countries
             CustomAlertView * alert =