Enhancements - filters

- The project attribute is now automatically filtered with
    project.startswith:<value>
  to provide leftmost matching (ie subprojects).
- Unmodifiable attributes (uuid, start ...) are now prevented from
  being updated if the command is designated as a "write" command.

src/Att.cpp

@@ -44,7 +44,7 @@ static const char* internalNames[] =
   "end",
   "mask",
   "imask",
-//  "limit",
+  "limit",
   "status",
   "description",
 };
@@ -200,7 +200,6 @@ bool Att::validName (const std::string& name)
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-// TODO Obsolete
 bool Att::validModifiableName (const std::string& name)
 {
   for (unsigned int i = 0; i < NUM_MODIFIABLE_NAMES; ++i)
@@ -294,6 +293,14 @@ bool Att::validNameValue (
     mod = matches[0];
   }
 
+  // Some attributes are intended to be private, unless the command is read-
+  // only, in which cased these are perfectly valid elements of a filter.
+  if (context.cmd.isWriteCommand () &&
+      !validModifiableName (name))
+    throw std::string ("\"") +
+          name               +
+          "\" is not an attribute you may modify directly.";
+
   // Thirdly, make sure the value has the expected form or values.
   if (name == "project")
   {
@@ -333,13 +340,8 @@ bool Att::validNameValue (
       Text::guessColor (value);
   }
 
-  else if (name == "due")
+  else if (name == "due" ||
-  {
+           name == "until")
-    if (value != "")
-      Date (value);
-  }
-
-  else if (name == "until")
   {
     if (value != "")
       Date (value);
@@ -351,28 +353,30 @@ bool Att::validNameValue (
       Duration (value);
   }
 
-  // TODO Not ready for prime time.
   else if (name == "limit")
   {
     if (value == "" || !digitsOnly (value))
       throw std::string ("The '") + name + "' attribute must be an integer.";
   }
 
-  // Some attributes are intended to be private, unless the command is read-
+  else if (name == "status")
-  // only, in which cased these are perfectly valid elements of a filter.
-  else if (name == "entry"       ||
-           name == "start"       ||
-           name == "end"         ||
-           name == "mask"        ||
-           name == "imask"       ||
-           name == "uuid"        ||
-           name == "status"      ||
-           name == "description")
   {
-    if (context.cmd.isWriteCommand ())
+    value = lowerCase (value);
+
+    std::vector <std::string> matches;
+    std::vector <std::string> candidates;
+    candidates.push_back ("pending");
+    candidates.push_back ("completed");
+    candidates.push_back ("deleted");
+    candidates.push_back ("recurring");
+    autoComplete (value, candidates, matches);
+
+    if (matches.size () == 1)
+      value = matches[0];
+    else
       throw std::string ("\"") +
-            name               +
+            value              +
-            "\" is not an attribute you may modify directly.";
+            "\" is not a valid status.  Use 'pending', 'completed', 'deleted' or 'recurring'.";
   }
 
   else

src/Context.cpp

@@ -494,7 +494,7 @@ void Context::constructFilter ()
 {
   foreach (att, task)
   {
-    // TODO this doesn't work.
+    // Words are found in the description using the .has modifier.
     if (att->first == "description")
     {
       std::vector <std::string> words;
@@ -502,19 +502,27 @@ void Context::constructFilter ()
       foreach (word, words)
       {
         filter.push_back (Att ("description", "has", *word));
-        std::cout << "Context::constructFilter " << att->first << "=" << *word << std::endl;
+        std::cout << "# auto filter: " << att->first << ".has:" << *word << "" << std::endl;
       }
     }
 
+    // Projects are matched left-most.
+    else if (att->first == "project")
+    {
+      filter.push_back (Att ("project", "startswith", att->second.value ()));
+        std::cout << "# auto filter: " << att->first << ".startswith:" << att->second.value () << "" << std::endl;
+    }
+
     // TODO Don't create a uuid for every task?
     // Every task has a unique uuid by default, and it shouldn't be included.
     // The mechanism for filtering on tags is +/-<tag>, not tags:foo which
     // means that there can only be one tag, "foo".
     else if (att->first != "uuid" &&
-             att->first != "tags")
+             att->first != "tags" &&
+             att->first != "project")
     {
       filter.push_back (att->second);
-      std::cout << "Context::constructFilter " << att->first << "=" << att->second.value () << std::endl;
+      std::cout << "# auto filter: " << att->first << ":" << att->second.value () << "" << std::endl;
     }
   }
 
@@ -524,14 +532,14 @@ void Context::constructFilter ()
   foreach (tag, tagAdditions)
   {
     filter.push_back (Att ("tags", "has", *tag));
-    std::cout << "Context::constructFilter tags=+" << *tag << std::endl;
+    std::cout << "# auto filter: +" << *tag << "" << std::endl;
   }
 
-  // TODO Include tagRemovals.
+  // Include tagRemovals.
   foreach (tag, tagRemovals)
   {
     filter.push_back (Att ("tags", "hasnt", *tag));
-    std::cout << "Context::constructFilter tags=-" << *tag << std::endl;
+    std::cout << "# auto filter: -" << *tag << "" << std::endl;
   }
 }