private async Task <TextEditorSessionDataV1> GetTextEditorSessionData(ITextEditor textEditor)
{
if (_sessionDataCache.TryGetValue(textEditor.Id, out TextEditorSessionDataV1 textEditorSessionData))
{
// We will not create new backup files for this text editor unless it has content changes
// But we should update latest TextEditor state meta data
textEditorSessionData.StateMetaData = textEditor.GetTextEditorStateMetaData();
}
else // Text content has been changed or editor has not backed up yet
{
textEditorSessionData = await BuildTextEditorSessionData(textEditor);
if (textEditorSessionData == null)
{
return(null);
}
_sessionDataCache.TryAdd(textEditor.Id, textEditorSessionData);
}
return(textEditorSessionData);
}
private async Task <TextEditorSessionDataV1> BuildTextEditorSessionData(ITextEditor textEditor)
{
TextEditorSessionDataV1 textEditorData = new TextEditorSessionDataV1
{
Id = textEditor.Id,
};
if (textEditor.EditingFile != null)
{
// Add the opened file to FutureAccessList so we can access it next launch
var futureAccessToken = ToToken(textEditor.Id);
await FileSystemUtility.TryAddOrReplaceTokenInFutureAccessList(futureAccessToken, textEditor.EditingFile);
textEditorData.EditingFileFutureAccessToken = futureAccessToken;
textEditorData.EditingFileName = textEditor.EditingFileName;
textEditorData.EditingFilePath = textEditor.EditingFilePath;
}
if (textEditor.IsModified)
{
if (textEditor.EditingFile != null)
{
// Persist the last save known to the app, which might not be up-to-date (if the file was modified outside the app)
var lastSavedBackupFile = await SessionUtility.CreateNewFileInBackupFolderAsync(
ToToken(textEditor.Id) + "-LastSaved",
CreationCollisionOption.ReplaceExisting,
_backupFolderName);
if (!await BackupTextAsync(textEditor.LastSavedSnapshot.Content,
textEditor.LastSavedSnapshot.Encoding,
textEditor.LastSavedSnapshot.LineEnding,
lastSavedBackupFile))
{
return(null); // Error: Failed to write backup text to file
}
textEditorData.LastSavedBackupFilePath = lastSavedBackupFile.Path;
}
if (textEditor.EditingFile == null ||
!string.Equals(textEditor.LastSavedSnapshot.Content, textEditor.GetText()))
{
// Persist pending changes relative to the last save
var pendingBackupFile = await SessionUtility.CreateNewFileInBackupFolderAsync(
ToToken(textEditor.Id) + "-Pending",
CreationCollisionOption.ReplaceExisting,
_backupFolderName);
if (!await BackupTextAsync(textEditor.GetText(),
textEditor.LastSavedSnapshot.Encoding,
textEditor.LastSavedSnapshot.LineEnding,
pendingBackupFile))
{
return(null); // Error: Failed to write backup text to file
}
textEditorData.PendingBackupFilePath = pendingBackupFile.Path;
}
}
textEditorData.StateMetaData = textEditor.GetTextEditorStateMetaData();
return(textEditorData);
}
