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Enhancement - undo

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- Now creates/opens/closes undo.data file.
- All new tasks are logged in undo.data file.
This commit is contained in:
Paul Beckingham 2009-06-28 12:23:46 -04:00
parent 58d7de8478
commit c29682b91f
4 changed files with 41 additions and 6 deletions
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42
src/TDB.cpp
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@ -124,6 +124,7 @@ void TDB::lock (bool lockFile /* = true */)
{
location->pending = openAndLock (location->path + "/pending.data");
location->completed = openAndLock (location->path + "/completed.data");
location->undo = openAndLock (location->path + "/undo.data");
}
mAllOpenAndLocked = true;
@ -147,6 +148,10 @@ void TDB::unlock ()
fflush (location->completed);
fclose (location->completed);
location->completed = NULL;
fflush (location->undo);
fclose (location->undo);
location->completed = NULL;
}
mAllOpenAndLocked = false;
@ -275,9 +280,6 @@ int TDB::loadCompleted (std::vector <Task>& tasks, Filter& filter)
char line[T_LINE_MAX];
foreach (location, mLocations)
{
// TODO If the filter contains Status:x where x is not deleted or
// completed, then this can be skipped.
line_number = 1;
file = location->path + "/completed.data";
@ -315,7 +317,6 @@ int TDB::loadCompleted (std::vector <Task>& tasks, Filter& filter)
}
////////////////////////////////////////////////////////////////////////////////
// TODO Write to transaction log.
// Note: mLocations[0] is where all tasks are written.
void TDB::add (const Task& task)
{
@ -324,14 +325,12 @@ void TDB::add (const Task& task)
}
////////////////////////////////////////////////////////////////////////////////
// TODO Write to transaction log.
void TDB::update (const Task& task)
{
mModified.push_back (task);
}
////////////////////////////////////////////////////////////////////////////////
// TODO Writes all, including comments
// Interestingly, only the pending file gets written to. The completed file is
// only modified by TDB::gc.
int TDB::commit ()
@ -351,6 +350,10 @@ int TDB::commit ()
fputs (task->composeF4 ().c_str (), mLocations[0].pending);
}
fseek (mLocations[0].undo, 0, SEEK_END);
foreach (task, mNew)
writeUndo (*task, mLocations[0].undo);
mNew.clear ();
return quantity;
}
@ -377,6 +380,13 @@ int TDB::commit ()
foreach (task, mPending)
fputs (task->composeF4 ().c_str (), mLocations[0].pending);
}
/*
// Update the undo log.
fseek (mLocations[0].undo, 0, SEEK_END);
foreach (task, mPending)
writeUndo (*task, mLocations[0].undo);
*/
}
return quantity;
@ -498,3 +508,23 @@ FILE* TDB::openAndLock (const std::string& file)
}
////////////////////////////////////////////////////////////////////////////////
void TDB::writeUndo (const Task& after, FILE* file)
{
Timer t ("TDB::writeUndo");
// TODO Locate "before" task (match on uuid).
fprintf (file,
"time %u\nnew %s\n---\n",
(unsigned int) time (NULL),
after.composeF4 ().c_str ());
/*
fprintf (file,
"time %u\nold %s\nnew %s\n---\n",
(unsigned int) time (NULL),
before.composeF4 ().c_str (),
after.composeF4 ().c_str ());
*/
}
////////////////////////////////////////////////////////////////////////////////