Add ability to identify todos by a regex.

Works for delete and do subcommands.

test/DeleteCommandTest.py

@@ -36,6 +36,15 @@ class DeleteCommandTest(CommandTest.CommandTest):
         self.assertEquals(self.output, "  2 Bar p:1\nRemoved: Foo id:1\n")
         self.assertEquals(self.errors, "")
 
+    def test_del1_regex(self):
+        command = DeleteCommand.DeleteCommand(["Foo"], self.todolist, self.out, self.error, lambda p: "n")
+        command.execute()
+
+        self.assertTrue(self.todolist.is_dirty())
+        self.assertEquals(self.todolist.todo(1).source(), "Bar")
+        self.assertEquals(self.output, "  2 Bar p:1\nRemoved: Foo id:1\n")
+        self.assertEquals(self.errors, "")
+
     def test_del2(self):
         command = DeleteCommand.DeleteCommand(["1"], self.todolist, self.out, self.error, lambda p: "y")
         command.execute()

test/DoCommandTest.py

@@ -133,7 +133,7 @@ class DoCommandTest(CommandTest.CommandTest):
         self.assertEquals(self.errors, "Invalid todo number given.\n")
 
     def test_invalid2(self):
-        command = DoCommand.DoCommand(["A"], self.todolist, self.out, self.error)
+        command = DoCommand.DoCommand(["AAA"], self.todolist, self.out, self.error)
         command.execute()
 
         self.assertFalse(self.todolist.is_dirty())
@@ -171,6 +171,15 @@ class DoCommandTest(CommandTest.CommandTest):
         self.assertFalse(self.output)
         self.assertEquals(self.errors, "Todo has already been completed.\n")
 
+    def test_do_regex1(self):
+        command = DoCommand.DoCommand(["baz"], self.todolist, self.out, self.error)
+        command.execute()
+
+        self.assertTrue(self.todolist.is_dirty())
+        self.assertTrue(self.todolist.todo(3).is_completed())
+        self.assertEquals(self.output, "Completed: x %s Baz p:1\n" % self.today)
+        self.assertEquals(self.errors, "")
+
     def test_empty(self):
         command = DoCommand.DoCommand([], self.todolist, self.out, self.error)
         command.execute()

test/TodoListTest.py

@@ -181,6 +181,18 @@ class TodoListTester(unittest.TestCase):
         self.assertEquals(self.todolist.count(), 0)
         self.assertTrue(self.todolist.is_dirty())
 
+    def test_regex1(self):
+        self.assertFalse(self.todolist.todo("1"))
+
+    def test_regex2(self):
+        """ Multiple hits should result in None. """
+        self.assertFalse(self.todolist.todo("Project1"))
+
+    def test_regex3(self):
+        todo = self.todolist.todo("project2")
+        self.assertTrue(todo)
+        self.assertEquals(todo.source(), "(D) Bar @Context1 +Project2")
+
 class TodoListDependencyTester(unittest.TestCase):
     def setUp(self):
         self.todolist = TodoList.TodoList([])

topydo/lib/DCommand.py

@@ -38,8 +38,12 @@ class DCommand(Command):
         try:
             self.number = convert_todo_number(self.argument(0))
             self.todo = self.todolist.todo(self.number)
-        except (InvalidCommandArgument, InvalidTodoNumberException, InvalidTodoException):
+        except (InvalidCommandArgument, InvalidTodoException):
             self.todo = None
+        except InvalidTodoNumberException:
+            self.todo = self.todolist.todo(self.argument(0))
+            if self.todo:
+                self.number = self.todolist.number(self.todo)
 
     def _uncompleted_children(self, p_todo):
         return sorted([t for t in self.todolist.children(p_todo) if not t.is_completed()])

topydo/lib/TodoList.py

 # Topydo - A todo.txt client written in Python.
 # Copyright (C) 2014 Bram Schoenmakers <me@bramschoenmakers.nl>
-# 
+#
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
-# 
+#
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
-# 
+#
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
@@ -20,6 +20,7 @@ A list of todo items.
 
 import re
 
+import Filter
 import Graph
 from PrettyPrinter import pretty_print_list
 import Todo
@@ -50,7 +51,7 @@ class TodoList(object):
 
         self.dirty = False
 
-    def todo(self, p_number):
+    def todo(self, p_identifier):
         """
         The _todos list has the same order as in the backend store (usually
         a todo.txt file. The user refers to the first task as number 1, so use
@@ -58,15 +59,31 @@ class TodoList(object):
         """
         result = None
         try:
-            result = self._todos[p_number - 1]
+            result = self._todos[p_identifier - 1]
         except IndexError:
             raise InvalidTodoException
+        except TypeError:
+            result = self.todo_by_regexp(p_identifier)
+
+        return result
+
+    def todo_by_regexp(self, p_identifier):
+        """
+        Returns the todo that is (uniquely) identified by the given regexp.
+        If the regexp matches more than one item, no result is returned.
+        """
+        result = None
+
+        candidates = Filter.GrepFilter(p_identifier).filter(self._todos)
+
+        if len(candidates) == 1:
+            result = candidates[0]
 
         return result
 
     def todo_by_hash(self, p_hash):
         """
-        Given the hash value of a todo, return the corresponding hash instance.
+        Given the hash value of a todo, return the corresponding instance.
         """
 
         result = None