CmdUnique: New helper command to generate unique value lists

src/commands/CMakeLists.txt

@@ -51,6 +51,7 @@ set (commands_SRCS Command.cpp        Command.h
                    CmdTimesheet.cpp   CmdTimesheet.h
                    CmdUDAs.cpp        CmdUDAs.h
                    CmdUndo.cpp        CmdUndo.h
+                   CmdUnique.cpp      CmdUnique.h
                    CmdUrgency.cpp     CmdUrgency.h
                    CmdVersion.cpp     CmdVersion.h)
 

src/commands/CmdUnique.cpp

@@ -0,0 +1,94 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2006 - 2015, Paul Beckingham, Federico Hernandez.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// http://www.opensource.org/licenses/mit-license.php
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#include <cmake.h>
+#include <iostream>
+#include <set>
+#include <algorithm>
+#include <Context.h>
+#include <Filter.h>
+#include <main.h>
+#include <i18n.h>
+#include <CmdUnique.h>
+
+extern Context context;
+
+////////////////////////////////////////////////////////////////////////////////
+CmdUnique::CmdUnique ()
+{
+  _keyword     = "_unique";
+  _usage       = "task <filter> _unique <attribute>";
+  _description = STRING_CMD_UNIQUE_USAGE;
+  _read_only   = false;
+  _displays_id = true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+int CmdUnique::execute (std::string& output)
+{
+  // Apply filter.
+  Filter filter;
+  filter.disableSafety ();
+  std::vector <Task> filtered;
+  filter.subset (filtered);
+
+  // Find <attribute>.
+  std::string attribute = "";
+  for (auto& a : context.cli2._args)
+  {
+    if ((a._lextype == Lexer::Type::word ||
+         a._lextype == Lexer::Type::dom) &&
+        a.hasTag ("MODIFICATION"))
+    {
+      // Stop at first matching arg.
+      attribute = a.attribute ("raw");
+      break;
+    }
+  }
+
+  if (attribute == "")
+    throw std::string (STRING_CMD_UNIQUE_MISSING);
+
+  std::string canonical;
+  if (! context.cli2.canonicalize (canonical, "attribute", attribute) &&
+      ! context.cli2.canonicalize (canonical, "uda",       attribute))
+    throw std::string (STRING_CMD_UNIQUE_VALID);
+
+  // Find number of matching tasks.
+  std::set <std::string> values;
+  for (auto& task : filtered)
+    if (task.has (canonical))
+      values.insert (task.get (canonical));
+
+  // Generate list of unique values.
+  for (auto& value : values)
+    std::cout << value << "\n";
+
+  context.headers.clear ();
+  return 0;
+}
+
+///////////////////////////////////////////////////////////////////////////////

src/commands/CmdUnique.h

@@ -0,0 +1,41 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+// Copyright 2006 - 2015, Paul Beckingham, Federico Hernandez.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+// http://www.opensource.org/licenses/mit-license.php
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef INCLUDED_CMDUNIQUE
+#define INCLUDED_CMDUNIQUE
+
+#include <string>
+#include <Command.h>
+
+class CmdUnique : public Command
+{
+public:
+  CmdUnique ();
+  int execute (std::string&);
+};
+
+#endif
+////////////////////////////////////////////////////////////////////////////////

src/commands/Command.cpp

@@ -81,6 +81,7 @@
 #include <CmdTimesheet.h>
 #include <CmdUDAs.h>
 #include <CmdUndo.h>
+#include <CmdUnique.h>
 #include <CmdUrgency.h>
 #include <CmdVersion.h>
 
@@ -155,6 +156,7 @@ void Command::factory (std::map <std::string, Command*>& all)
   c = new CmdTimesheet ();          all[c->keyword ()] = c;
   c = new CmdUDAs ();               all[c->keyword ()] = c;
   c = new CmdUndo ();               all[c->keyword ()] = c;
+  c = new CmdUnique ();             all[c->keyword ()] = c;
   c = new CmdUrgency ();            all[c->keyword ()] = c;
   c = new CmdUUIDs ();              all[c->keyword ()] = c;
   c = new CmdVersion ();            all[c->keyword ()] = c;