Enhancement - Hooks

- Implemented pre-completed, post-completed events.
- Added debug info for event triggers.
- Removed support for pre-file-unlock, post-file-unlock, as they are
  called from TDB::~TDB in Context::~Context, which is after Hooks::~Hooks,
  which means segfault.

src/Hooks.cpp

@@ -150,6 +150,8 @@ bool Hooks::trigger (const std::string& event)
       std::string type;
       if (eventType (event, type))
       {
+        context.debug (std::string ("Event ") + event + " triggered");
+
         // Figure out where to get the calling-context info from.
              if (type == "program") rc = api.callProgramHook (it->file, it->function);
         else if (type == "list")    rc = api.callListHook    (it->file, it->function/*, tasks*/);
@@ -182,7 +184,6 @@ bool Hooks::eventType (const std::string& event, std::string& type)
       event == "pre-gc"          || event == "post-gc"          ||
       event == "pre-undo"        || event == "post-undo"        ||
       event == "pre-file-lock"   || event == "post-file-lock"   ||
-      event == "pre-file-unlock" || event == "post-file-unlock" ||
       event == "pre-add-command" || event == "post-add-command")
   {
     type = "program";
@@ -194,7 +195,8 @@ bool Hooks::eventType (const std::string& event, std::string& type)
     return true;
   }
   else if (event == "pre-tag"       || event == "post-tag"       ||
-           event == "pre-detag" || event == "post-detag")
+           event == "pre-detag"     || event == "post-detag"     ||
+           event == "pre-completed" || event == "post-completed")
   {
     type = "task";
     return true;

src/TDB.cpp

@@ -143,8 +143,6 @@ void TDB::lock (bool lockFile /* = true */)
 
 ////////////////////////////////////////////////////////////////////////////////
 void TDB::unlock ()
-{
-  if (mAllOpenAndLocked && context.hooks.trigger ("pre-file-unlock"))
 {
   mPending.clear ();
   mNew.clear ();
@@ -166,8 +164,6 @@ void TDB::unlock ()
   }
 
   mAllOpenAndLocked = false;
-    context.hooks.trigger ("post-file-unlock");
-  }
 }
 
 ////////////////////////////////////////////////////////////////////////////////

src/command.cpp

@@ -993,6 +993,9 @@ int handleDone (std::string &outs)
       task->setStatus (Task::completed);
 
       if (taskDiff (before, *task))
+      {
+        context.hooks.setTaskId (task->id);
+        if (context.hooks.trigger ("pre-completed"))
         {
           if (permission.confirmed (before, taskDifferences (before, *task) + "Proceed with change?"))
           {
@@ -1008,6 +1011,11 @@ int handleDone (std::string &outs)
 
             ++count;
           }
+
+          context.hooks.trigger ("post-completed");
+        }
+        else
+          continue;
       }
 
       updateRecurrenceMask (all, *task);
@@ -1024,7 +1032,9 @@ int handleDone (std::string &outs)
       rc = 1;
   }
 
+  if (count)
     context.tdb.commit ();
+
   context.tdb.unlock ();
 
   if (context.config.getBoolean ("echo.command"))