Enhancement - id sequences

- Recognizes id sequences on the command line.  Doesn't do anything
  with them yet.

src/T.h

@@ -50,6 +50,8 @@ public:
 
   int getId () const                                   { return mId; }
   void setId (int id)                                  { mId = id; }
+  std::vector <int> getAllIds () const                 { return mSequence; }
+  void addId (int id)                                  { mSequence.push_back (id); }
 
   status getStatus () const                            { return mStatus; }
   void setStatus (status s)                            { mStatus = s; }
@@ -95,6 +97,7 @@ private:
   status                             mStatus;
   std::string                        mUUID;
   int                                mId;
+  std::vector <int>                  mSequence;
   std::string                        mDescription;
   std::vector<std::string>           mTags;
   std::vector<std::string>           mRemoveTags;

src/parse.cpp

@@ -306,6 +306,60 @@ static bool validId (const std::string& input)
   return true;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// 1,2-4,6
+static bool validSequence (
+  const std::string& input,
+  std::vector <int>& ids)
+{
+  std::vector <std::string> ranges;
+  split (ranges, input, ',');
+
+  std::vector <std::string>::iterator it;
+  for (it = ranges.begin (); it != ranges.end (); ++it)
+  {
+    std::vector <std::string> range;
+    split (range, *it, '-');
+
+    switch (range.size ())
+    {
+    case 1:
+      if (! validId (range[0]))
+        return false;
+
+      int id = ::atoi (range[0].c_str ());
+      ids.push_back (id);
+//      std::cout << "# seq: " << id << std::endl;
+      break;
+
+    case 2:
+      {
+        if (! validId (range[0]) ||
+            ! validId (range[1]))
+          return false;
+
+        int low  = ::atoi (range[0].c_str ());
+        int high = ::atoi (range[1].c_str ());
+        if (low >= high)
+          return false;
+
+        for (int i = low; i <= high; ++i)
+//        {
+          ids.push_back (i);
+//          std::cout << "# seq: " << i << std::endl;
+//        }
+      }
+      break;
+
+    default:
+      return false;
+      break;
+    }
+  }
+
+  return ids.size () > 1 ? true : false;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 static bool validTag (const std::string& input)
 {
@@ -390,15 +444,25 @@ bool validDuration (std::string& input)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// Token        Distinguishing characteristic
-// -------      -----------------------------
-// command      first positional
-// id           \d+
-// description  default, accumulate
-// substitution /\w+/\w*/
-// tags         [-+]\w+
-// attributes   \w+:.+
+// Token        EBNF
+// -------      ----------------------------------
+// command      first non-id recognized argument
 //
+// id           ::= \d+
+//
+// substitution ::= "/" from "/" to "/g"
+//                | "/" from "/" to "/" ;
+//
+// tags         ::= "+" word
+//                | "-" word ;
+//
+// attributes   ::= word ":" value
+//                | word ":"
+//
+// sequence     ::= id "," sequence
+//                | id "-" id ;
+//
+// description  (whatever isn't one of the above)
 void parse (
   std::vector <std::string>& args,
   std::string& command,
@@ -420,12 +484,30 @@ void parse (
       std::string from;
       std::string to;
       bool global;
+      std::vector <int> sequence;
 
       // An id is the first argument found that contains all digits.
-      if (lowerCase (command) != "add" && // "add" doesn't require an ID
-          task.getId () == 0           &&
-          validId (arg))
+      if (lowerCase (command) != "add"  &&
+/*
+          task.getSequenceCount () == 0 &&
+*/
+          validSequence (arg, sequence))
+      {
+/*
+        for (?)
+          task.addSequence (?)
+*/
+        std::cout << "# look like a sequence" << std::endl;
+        foreach (id, sequence)
+          task.addId (*id);
+      }
+
+      else if (lowerCase (command) != "add" && // "add" doesn't require an ID
+               task.getId () == 0           &&
+               validId (arg))
+      {
         task.setId (::atoi (arg.c_str ()));
+      }
 
       // Tags begin with + or - and contain arbitrary text.
       else if (validTag (arg))