Add force mode to TagCommand.

There are actually two force modes, one to force adding a tag and
one force mode that omits user interaction. The first kind is done
with -a, the second one with -f.

The meaning of -f changes in this commit, but now it's consistent
with the other subcommands.

test/TagCommandTest.py

@@ -48,7 +48,7 @@ class TagCommandTest(CommandTest.CommandTest):
         self.assertTrue(self.todolist.is_dirty())
 
     def test_add_tag3(self):
-        command = TagCommand.TagCommand(["-f", "2", "due", "2014-10-19"], self.todolist, self.out, self.error)
+        command = TagCommand.TagCommand(["-a", "2", "due", "2014-10-19"], self.todolist, self.out, self.error)
         command.execute()
 
         self.assertEquals(self.todolist.todo(2).source(), "Bar due:2014-10-22 due:2014-10-19")
@@ -112,6 +112,14 @@ class TagCommandTest(CommandTest.CommandTest):
         self.assertEquals(self.output, " 1. 2014-10-20\n 2. 2014-10-22\n  4 Fnord due:2014-10-20 due:2014-10-22\n")
         self.assertEquals(self.errors, "")
 
+    def test_set_tag10(self):
+        command = TagCommand.TagCommand(["-f", "4", "due", "2014-10-20"], self.todolist, self.out, self.error, lambda t: "99")
+        command.execute()
+
+        self.assertTrue(self.todolist.is_dirty())
+        self.assertEquals(self.output, "  4 Fnord due:2014-10-20 due:2014-10-20\n")
+        self.assertEquals(self.errors, "")
+
     def test_rm_tag1(self):
         command = TagCommand.TagCommand(["1", "due"], self.todolist, self.out, self.error)
         command.execute()
@@ -176,6 +184,14 @@ class TagCommandTest(CommandTest.CommandTest):
         self.assertEquals(self.output, "")
         self.assertEquals(self.errors, "Invalid todo number.\n")
 
+    def test_rm_tag10(self):
+        command = TagCommand.TagCommand(["-f", "4", "due"], self.todolist, self.out, self.error, lambda t: "A")
+        command.execute()
+
+        self.assertTrue(self.todolist.is_dirty())
+        self.assertEquals(self.output, "  4 Fnord\n")
+        self.assertEquals(self.errors, "")
+
     def test_help(self):
         command = TagCommand.TagCommand(["help"], self.todolist, self.out, self.error)
         command.execute()

topydo/lib/TagCommand.py

@@ -26,15 +26,18 @@ class TagCommand(Command):
         super(TagCommand, self).__init__(p_args, p_todolist, p_out, p_err, p_prompt)
 
         self.force = False
+        self.force_add = False
         self.todo = None
         self.tag = None
         self.value = None
         self.values = []
 
     def _process_flags(self):
-        flags, args = self.getopt("f")
+        flags, args = self.getopt("af")
         for flag, value in flags:
-            if flag == "-f":
+            if flag == "-a":
+                self.force_add = True
+            elif flag == "-f":
                 self.force = True
 
         self.args = args
@@ -61,6 +64,9 @@ class TagCommand(Command):
         """
         Returns the chosen number of the tag value to process (or "all")
         """
+        answer = "all"
+
+        if not self.force:
             for i, value in enumerate(self.current_values):
                 self.out("%2d. %s" % (i + 1, value))
 
@@ -79,7 +85,7 @@ class TagCommand(Command):
 
     def _set_helper(self, p_old_value=""):
         old_src = self.todo.source()
-        self.todo.set_tag(self.tag, self.value, self.force, p_old_value)
+        self.todo.set_tag(self.tag, self.value, self.force_add, p_old_value)
 
         if old_src != self.todo.source():
             self.todolist.set_dirty()
@@ -109,9 +115,12 @@ class TagCommand(Command):
             self._set()
 
     def usage(self):
-        return """Synopsis: tag <NUMBER> <tag> [<value>]"""
+        return """Synopsis: tag [-a] [-f] <NUMBER> <tag> [<value>]"""
 
     def help(self):
         return """Sets the given tag to the given todo number with the given value. If
 the value is omitted, the tag is removed from the todo item.
+
+-a : Do not change the current value of the tag if it exists, but add a new value.
+-f : Force setting/removing all values of the tag. Prevents interaction with the user.
         """