Commands

- Promoted filtering code to the Command base class.
- Added filtering short-circuit.

src/commands/Command.h

@@ -29,7 +29,9 @@
 #define L10N                                           // Localization complete.
 
 #include <map>
+#include <vector>
 #include <string>
+#include <Task.h>
 
 class Command
 {
@@ -49,6 +51,8 @@ public:
   bool displays_id () const;
   virtual int execute (std::string&) = 0;
 
+  void filter (std::vector <Task>&, std::vector <Task>&);
+
 protected:
   std::string _keyword;
   std::string _usage;