Various export enhancements and fixes, including:

- A new SPExportFile class, providing an abstract interface to the handling and creation of export files.
- Enables the centralisation of all file/file handle creation logic as well as better support for handling situations where files fail to be created, including files that already exist at the export location.
- New SPExportFileHandleStatus constants to support the reporting of file handle creation.
- Update SPExporter to use the new file class instead of directly using an instance of SPFileHandle.
- Add the necessary logic to deal with files that already exist on disk, by providing the user with 3 options: cancel the export, ignore the files in question or overwrite them. We might want to enhance this to make new files sequential in name to prevent overwriting. Fixes issue #742.
- New SPExportFileUtilities category, which centralises all the logic relating to writing export type headers as well as dealing with problems occurred during file/file handle creation.
- Improve feedback given on the export progress sheet during export initialisation.
- Tidy up and improve comments.

1 files changed, 20 insertions, 0 deletions

diff --git a/sequel-pro.xcodeproj/project.pbxproj b/sequel-pro.xcodeproj/project.pbxproj
index 450a5c8b..79980eb9 100644
--- a/sequel-pro.xcodeproj/project.pbxproj
+++ b/sequel-pro.xcodeproj/project.pbxproj
@@ -135,6 +135,8 @@
 		17F5B1541048C50D00FC794F /* SPExporter.m in Sources */ = {isa = PBXBuildFile; fileRef = 17F5B1531048C50D00FC794F /* SPExporter.m */; };
 		17F5B39C1049B96A00FC794F /* SPSQLExporter.m in Sources */ = {isa = PBXBuildFile; fileRef = 17F5B39B1049B96A00FC794F /* SPSQLExporter.m */; };
 		17F90E2C1210B34900274C98 /* Credits.rtf in Resources */ = {isa = PBXBuildFile; fileRef = 17F90E2B1210B34900274C98 /* Credits.rtf */; };
+		17F90E481210B42700274C98 /* SPExportFile.m in Sources */ = {isa = PBXBuildFile; fileRef = 17F90E471210B42700274C98 /* SPExportFile.m */; };
+		17F90E4B1210B43A00274C98 /* SPExportFileUtilities.m in Sources */ = {isa = PBXBuildFile; fileRef = 17F90E4A1210B43A00274C98 /* SPExportFileUtilities.m */; };
 		296DC89F0F8FD336002A3258 /* WebKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 296DC89E0F8FD336002A3258 /* WebKit.framework */; };
 		296DC8B60F909194002A3258 /* MGTemplateEngine.m in Sources */ = {isa = PBXBuildFile; fileRef = 296DC8A70F909194002A3258 /* MGTemplateEngine.m */; };
 		296DC8B70F909194002A3258 /* RegexKitLite.m in Sources */ = {isa = PBXBuildFile; fileRef = 296DC8AB0F909194002A3258 /* RegexKitLite.m */; };
@@ -689,6 +691,10 @@
 		17F5B1531048C50D00FC794F /* SPExporter.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SPExporter.m; sourceTree = "<group>"; };
 		17F5B39A1049B96A00FC794F /* SPSQLExporter.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SPSQLExporter.h; sourceTree = "<group>"; };
 		17F5B39B1049B96A00FC794F /* SPSQLExporter.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SPSQLExporter.m; sourceTree = "<group>"; };
+		17F90E461210B42700274C98 /* SPExportFile.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SPExportFile.h; sourceTree = "<group>"; };
+		17F90E471210B42700274C98 /* SPExportFile.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SPExportFile.m; sourceTree = "<group>"; };
+		17F90E491210B43A00274C98 /* SPExportFileUtilities.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = SPExportFileUtilities.h; sourceTree = "<group>"; };
+		17F90E4A1210B43A00274C98 /* SPExportFileUtilities.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = SPExportFileUtilities.m; sourceTree = "<group>"; };
 		296DC89E0F8FD336002A3258 /* WebKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = WebKit.framework; path = /System/Library/Frameworks/WebKit.framework; sourceTree = "<absolute>"; };
 		296DC8A50F909194002A3258 /* MGTemplateMarker.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MGTemplateMarker.h; sourceTree = "<group>"; };
 		296DC8A60F909194002A3258 /* MGTemplateFilter.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MGTemplateFilter.h; sourceTree = "<group>"; };
@@ -1832,8 +1838,11 @@
 				173C836E11AAD26E00B8B084 /* SPExportInitializer.m */,
 				173C836F11AAD26E00B8B084 /* SPExportUtilities.h */,
 				173C837011AAD26E00B8B084 /* SPExportUtilities.m */,
+				17F90E491210B43A00274C98 /* SPExportFileUtilities.h */,
+				17F90E4A1210B43A00274C98 /* SPExportFileUtilities.m */,
 				17AF787911FC41C00073D043 /* SPExportFilenameUtilities.h */,
 				17AF787A11FC41C00073D043 /* SPExportFilenameUtilities.m */,
+				17F90E451210B41100274C98 /* Model */,
 				173C836C11AAD24300B8B084 /* Exporters */,
 				173C837C11AAD2C500B8B084 /* Delegate Protocols */,
 				173C837D11AAD2D300B8B084 /* Delegate Categories */,
@@ -1841,6 +1850,15 @@
 			name = "Data Export";
 			sourceTree = "<group>";
 		};
+		17F90E451210B41100274C98 /* Model */ = {
+			isa = PBXGroup;
+			children = (
+				17F90E461210B42700274C98 /* SPExportFile.h */,
+				17F90E471210B42700274C98 /* SPExportFile.m */,
+			);
+			name = Model;
+			sourceTree = "<group>";
+		};
 		19C28FB0FE9D524F11CA2CBB /* Products */ = {
 			isa = PBXGroup;
 			children = (
@@ -2723,6 +2741,8 @@
 				17A7773411C52D8E001E27B4 /* SPIndexesController.m in Sources */,
 				589ED05B11E0ACD100C1DCEA /* DMLocalizedNib.m in Sources */,
 				17AF787B11FC41C00073D043 /* SPExportFilenameUtilities.m in Sources */,
+				17F90E481210B42700274C98 /* SPExportFile.m in Sources */,
+				17F90E4B1210B43A00274C98 /* SPExportFileUtilities.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};