Enhancement - export.yaml

- Preliminary export.yaml support.  No unit tests yet, and no decision
  on including this feature.  It may be that libyaml is the right choice,
  as an optional dependency.

src/Cmd.cpp

@@ -115,6 +115,7 @@ void Cmd::load ()
     commands.push_back ("_merge");
     commands.push_back ("export.csv");
     commands.push_back ("export.ical");
+    commands.push_back ("export.yaml");
     commands.push_back ("history.monthly");
     commands.push_back ("history.annual");
     commands.push_back ("ghistory.monthly");
@@ -207,6 +208,7 @@ bool Cmd::isReadOnlyCommand ()
       command == "_version"                                                         ||
       command == "export.csv"                                                       ||
       command == "export.ical"                                                      ||
+      command == "export.yaml"                                                      ||
       command == "history.monthly"                                                  ||
       command == "history.annual"                                                   ||
       command == "ghistory.monthly"                                                 ||

src/Context.cpp

@@ -233,6 +233,7 @@ int Context::dispatch (std::string &out)
   else if (cmd.command == "stop")             { rc = handleStop                  (out); }
   else if (cmd.command == "export.csv")       { rc = handleExportCSV             (out); }
   else if (cmd.command == "export.ical")      { rc = handleExportiCal            (out); }
+  else if (cmd.command == "export.yaml")      { rc = handleExportYAML            (out); }
   else if (cmd.command == "import")           { rc = handleImport                (out); }
   else if (cmd.command == "duplicate")        { rc = handleDuplicate             (out); }
   else if (cmd.command == "edit")             { rc = handleEdit                  (out); }

src/Task.cpp

@@ -1,7 +1,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 // task - a command line task list manager.
 //
-// Copyright 2006 - 2010, Paul Beckingham.
+// Copyright 2006 - 2010, Paul Beckingham, Federico Hernandez.
 // All rights reserved.
 //
 // This program is free software; you can redistribute it and/or modify it under
@@ -392,6 +392,33 @@ std::string Task::composeCSV () const
   return out.str ();
 }
 
+////////////////////////////////////////////////////////////////////////////////
+std::string Task::composeYAML () const
+{
+  std::stringstream out;
+
+  // Task header.
+  out << "  task:\n";
+
+  // Get all the supported attribute names.
+  std::vector <std::string> names;
+  Att::allNames (names);
+  std::sort (names.begin (), names.end ());
+
+  foreach (name, names)
+    out << "    " << *name << ": " << get (*name) << "\n";
+
+  // Now the annotations, which are not listed by the Att::allNames call.
+  std::vector <Att> annotations;
+  getAnnotations (annotations);
+  foreach (a, annotations)
+    out << "    annotation:\n"
+        << "      entry: "       << a->name().substr (12) << "\n"
+        << "      description: " << a->value ()           << "\n";
+
+  return out.str ();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 void Task::getAnnotations (std::vector <Att>& annotations) const
 {

src/Task.h

@@ -1,7 +1,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 // task - a command line task list manager.
 //
-// Copyright 2006 - 2010, Paul Beckingham.
+// Copyright 2006 - 2010, Paul Beckingham, Federico Hernandez.
 // All rights reserved.
 //
 // This program is free software; you can redistribute it and/or modify it under
@@ -44,6 +44,7 @@ public:
 
   void parse (const std::string&);
   std::string composeCSV () const;
+  std::string composeYAML () const;
 
   // Status values.
   enum status {pending, completed, deleted, recurring, waiting};

src/export.cpp

@@ -62,8 +62,6 @@ int handleExportCSV (std::string &outs)
         << "'description'"
         << "\n";
 
-    int count = 0;
-
     // Get all the tasks.
     std::vector <Task> tasks;
     context.tdb.lock (context.config.getBoolean ("locking"));
@@ -77,10 +75,7 @@ int handleExportCSV (std::string &outs)
       context.hooks.trigger ("pre-display", *task);
 
       if (task->getStatus () != Task::recurring)
-      {
         out << task->composeCSV ().c_str ();
-        ++count;
-      }
     }
 
     outs = out.str ();
@@ -106,8 +101,6 @@ int handleExportiCal (std::string &outs)
         << "VERSION:2.0\n"
         << "PRODID:-//GBF//" << PACKAGE_STRING << "//EN\n";
 
-    int count = 0;
-
     // Get all the tasks.
     std::vector <Task> tasks;
     context.tdb.lock (context.config.getBoolean ("locking"));
@@ -214,7 +207,6 @@ int handleExportiCal (std::string &outs)
           out << "COMMENT:" << anno->value () << "\n";
 
         out << "END:VTODO\n";
-        ++count;
       }
     }
 
@@ -228,3 +220,36 @@ int handleExportiCal (std::string &outs)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
+int handleExportYAML (std::string &outs)
+{
+  int rc = 0;
+
+  if (context.hooks.trigger ("pre-export-command"))
+  {
+    // YAML header.
+    std::stringstream out;
+    out << "%YAML 1.1\n"
+        << "---\n";
+
+    // Get all the tasks.
+    std::vector <Task> tasks;
+    context.tdb.lock (context.config.getBoolean ("locking"));
+    handleRecurrence ();
+    context.tdb.load (tasks, context.filter);
+    context.tdb.commit ();
+    context.tdb.unlock ();
+
+    foreach (task, tasks)
+    {
+      context.hooks.trigger ("pre-display", *task);
+      out << task->composeYAML ().c_str ();
+    }
+
+    outs = out.str ();
+    context.hooks.trigger ("post-export-command");
+  }
+
+  return rc;
+}
+
+////////////////////////////////////////////////////////////////////////////////

src/main.h

@@ -133,6 +133,7 @@ int handleImport (std::string&);
 // export.cpp
 int handleExportCSV (std::string &);
 int handleExportiCal (std::string &);
+int handleExportYAML (std::string &);
 
 // list template
 ///////////////////////////////////////////////////////////////////////////////