Task: Represent dependant tasks as a set

[etc/taskwarrior.git] / tasklib / task.py

diff --git a/tasklib/task.py b/tasklib/task.py
index 170fc77e545bf076a5d1d6d6ed6977178fc2fe34..8fe1e1b47df278c8d58e8692a266dbc3215ac6c1 100644 (file)
--- a/tasklib/task.py
+++ b/tasklib/task.py
@@ -12,6 +12,11 @@ REPR_OUTPUT_SIZE = 10
 PENDING = 'pending'
 COMPLETED = 'completed'
 
 PENDING = 'pending'
 COMPLETED = 'completed'
 

+VERSION_2_1_0 = six.u('2.1.0')
+VERSION_2_2_0 = six.u('2.2.0')
+VERSION_2_3_0 = six.u('2.3.0')
+VERSION_2_4_0 = six.u('2.4.0')
+

 logger = logging.getLogger(__name__)
 
 
 logger = logging.getLogger(__name__)
 
 


@@ -24,8 +29,19 @@ class TaskResource(object):
 
     def _load_data(self, data):
         self._data = data
 
     def _load_data(self, data):
         self._data = data

+        # We need to use a copy for original data, so that changes
+        # are not propagated
+        self._original_data = data.copy()

 
     def __getitem__(self, key):
 
     def __getitem__(self, key):

+        # This is a workaround to make TaskResource non-iterable
+        # over simple index-based iteration
+        try:
+            int(key)
+            raise StopIteration
+        except ValueError:
+            pass
+

         hydrate_func = getattr(self, 'deserialize_{0}'.format(key),
                                lambda x: x)
         return hydrate_func(self._data.get(key))
         hydrate_func = getattr(self, 'deserialize_{0}'.format(key),
                                lambda x: x)
         return hydrate_func(self._data.get(key))


@@ -36,7 +52,6 @@ class TaskResource(object):
         dehydrate_func = getattr(self, 'serialize_{0}'.format(key),
                                  lambda x: x)
         self._data[key] = dehydrate_func(value)
         dehydrate_func = getattr(self, 'serialize_{0}'.format(key),
                                  lambda x: x)
         self._data[key] = dehydrate_func(value)

-        self._modified_fields.add(key)

 
     def __str__(self):
         s = six.text_type(self.__unicode__())
 
     def __str__(self):
         s = six.text_type(self.__unicode__())


@@ -102,11 +117,22 @@ class Task(TaskResource):
         kwargs.update(data)
 
         self._load_data(kwargs)
         kwargs.update(data)
 
         self._load_data(kwargs)

-        self._modified_fields = set()

 
     def __unicode__(self):
         return self['description']
 
 
     def __unicode__(self):
         return self['description']
 

+    def __eq__(self, other):
+        return self['uuid'] == other['uuid']
+
+    def __hash__(self):
+        return self['uuid'].__hash__()
+
+    @property
+    def _modified_fields(self):
+        for key in self._data.keys():
+            if self._data.get(key) != self._original_data.get(key):
+                yield key
+

     @property
     def completed(self):
         return self['status'] == six.text_type('completed')
     @property
     def completed(self):
         return self['status'] == six.text_type('completed')


@@ -135,6 +161,41 @@ class Task(TaskResource):
             return None
         return datetime.datetime.strptime(date_str, DATE_FORMAT)
 
             return None
         return datetime.datetime.strptime(date_str, DATE_FORMAT)
 

+    def serialize_depends(self, cur_dependencies):
+        # Check that all the tasks are saved
+        for task in cur_dependencies:
+            if not task.saved:
+                raise Task.NotSaved('Task \'%s\' needs to be saved before '
+                                    'it can be set as dependency.' % task)
+
+        # Return the list of uuids
+        return ','.join(task['uuid'] for task in cur_dependencies)
+
+    def deserialize_depends(self, raw_uuids):
+        raw_uuids = raw_uuids or ''  # Convert None to empty string
+        uuids = raw_uuids.split(',')
+        return set(self.warrior.tasks.get(uuid=uuid) for uuid in uuids if uuid)
+
+    def format_depends(self):
+        # We need to generate added and removed dependencies list,
+        # since Taskwarrior does not accept redefining dependencies.
+
+        # This cannot be part of serialize_depends, since we need
+        # to keep a list of all depedencies in the _data dictionary,
+        # not just currently added/removed ones
+
+        old_dependencies_raw = self._original_data.get('depends','')
+        old_dependencies = self.deserialize_depends(old_dependencies_raw)
+
+        added = self['depends'] - old_dependencies
+        removed = old_dependencies - self['depends']
+
+        # Removed dependencies need to be prefixed with '-'
+        return ','.join(
+                [t['uuid'] for t in added] +
+                ['-' + t['uuid'] for t in removed]
+            )
+

     def deserialize_annotations(self, data):
         return [TaskAnnotation(self, d) for d in data] if data else []
 
     def deserialize_annotations(self, data):
         return [TaskAnnotation(self, d) for d in data] if data else []
 


@@ -148,13 +209,13 @@ class Task(TaskResource):
 
     def delete(self):
         if not self.saved:
 
     def delete(self):
         if not self.saved:

-            raise self.NotSaved("Task needs to be saved before it can be deleted")
+            raise Task.NotSaved("Task needs to be saved before it can be deleted")

 
         # Refresh the status, and raise exception if the task is deleted
         self.refresh(only_fields=['status'])
 
         if self.deleted:
 
         # Refresh the status, and raise exception if the task is deleted
         self.refresh(only_fields=['status'])
 
         if self.deleted:

-            raise self.DeletedTask("Task was already deleted")
+            raise Task.DeletedTask("Task was already deleted")

 
         self.warrior.execute_command([self['uuid'], 'delete'], config_override={
             'confirmation': 'no',
 
         self.warrior.execute_command([self['uuid'], 'delete'], config_override={
             'confirmation': 'no',


@@ -166,15 +227,15 @@ class Task(TaskResource):
 
     def done(self):
         if not self.saved:
 
     def done(self):
         if not self.saved:

-            raise self.NotSaved("Task needs to be saved before it can be completed")
+            raise Task.NotSaved("Task needs to be saved before it can be completed")

 
         # Refresh, and raise exception if task is already completed/deleted
         self.refresh(only_fields=['status'])
 
         if self.completed:
 
         # Refresh, and raise exception if task is already completed/deleted
         self.refresh(only_fields=['status'])
 
         if self.completed:

-            raise self.CompletedTask("Cannot complete a completed task")
+            raise Task.CompletedTask("Cannot complete a completed task")

         elif self.deleted:
         elif self.deleted:

-            raise self.DeletedTask("Deleted task cannot be completed")
+            raise Task.DeletedTask("Deleted task cannot be completed")

 
         self.warrior.execute_command([self['uuid'], 'done'])
 
 
         self.warrior.execute_command([self['uuid'], 'done'])
 


@@ -199,12 +260,11 @@ class Task(TaskResource):
             # Circumvent the ID storage, since ID is considered read-only
             self._data['id'] = int(id_lines[0].split(' ')[2].rstrip('.'))
 
             # Circumvent the ID storage, since ID is considered read-only
             self._data['id'] = int(id_lines[0].split(' ')[2].rstrip('.'))
 

-        self._modified_fields.clear()

         self.refresh()
 
     def add_annotation(self, annotation):
         if not self.saved:
         self.refresh()
 
     def add_annotation(self, annotation):
         if not self.saved:

-            raise self.NotSaved("Task needs to be saved to add annotation")
+            raise Task.NotSaved("Task needs to be saved to add annotation")

 
         args = [self['uuid'], 'annotate', annotation]
         self.warrior.execute_command(args)
 
         args = [self['uuid'], 'annotate', annotation]
         self.warrior.execute_command(args)


@@ -212,7 +272,7 @@ class Task(TaskResource):
 
     def remove_annotation(self, annotation):
         if not self.saved:
 
     def remove_annotation(self, annotation):
         if not self.saved:

-            raise self.NotSaved("Task needs to be saved to add annotation")
+            raise Task.NotSaved("Task needs to be saved to add annotation")

 
         if isinstance(annotation, TaskAnnotation):
             annotation = annotation['description']
 
         if isinstance(annotation, TaskAnnotation):
             annotation = annotation['description']


@@ -223,23 +283,33 @@ class Task(TaskResource):
     def _get_modified_fields_as_args(self):
         args = []
 
     def _get_modified_fields_as_args(self):
         args = []
 

+        def add_field(field):
+            # Task version older than 2.4.0 ignores first word of the
+            # task description if description: prefix is used
+            if self.warrior.version < VERSION_2_4_0 and field == 'description':
+                args.append(self._data[field])
+            elif field == 'depends':
+                args.append('{0}:{1}'.format(field, self.format_depends()))
+            else:
+                args.append('{0}:{1}'.format(field, self._data[field]))
+

         # If we're modifying saved task, simply pass on all modified fields
         if self.saved:
             for field in self._modified_fields:
         # If we're modifying saved task, simply pass on all modified fields
         if self.saved:
             for field in self._modified_fields:

-                args.append('{0}:{1}'.format(field, self._data[field]))
+                add_field(field)

         # For new tasks, pass all fields that make sense
         else:
             for field in self._data.keys():
                 if field in self.read_only_fields:
                     continue
         # For new tasks, pass all fields that make sense
         else:
             for field in self._data.keys():
                 if field in self.read_only_fields:
                     continue

-                args.append('{0}:{1}'.format(field, self._data[field]))
+                add_field(field)

 
         return args
 
     def refresh(self, only_fields=[]):
         # Raise error when trying to refresh a task that has not been saved
         if not self.saved:
 
         return args
 
     def refresh(self, only_fields=[]):
         # Raise error when trying to refresh a task that has not been saved
         if not self.saved:

-            raise self.NotSaved("Task needs to be saved to be refreshed")
+            raise Task.NotSaved("Task needs to be saved to be refreshed")

 
         # We need to use ID as backup for uuid here for the refreshes
         # of newly saved tasks. Any other place in the code is fine
 
         # We need to use ID as backup for uuid here for the refreshes
         # of newly saved tasks. Any other place in the code is fine


@@ -250,8 +320,13 @@ class Task(TaskResource):
             to_update = dict(
                 [(k, new_data.get(k)) for k in only_fields])
             self._data.update(to_update)
             to_update = dict(
                 [(k, new_data.get(k)) for k in only_fields])
             self._data.update(to_update)

+            self._original_data.update(to_update)

         else:
             self._data = new_data
         else:
             self._data = new_data

+            # We need to create a clone for original_data though
+            # Shallow copy is alright, since data dict uses only
+            # primitive data types
+            self._original_data = new_data.copy()

 
 
 class TaskFilter(object):
 
 
 class TaskFilter(object):


@@ -271,7 +346,13 @@ class TaskFilter(object):
         # Replace the value with empty string, since that is the
         # convention in TW for empty values
         value = value if value is not None else ''
         # Replace the value with empty string, since that is the
         # convention in TW for empty values
         value = value if value is not None else ''

-        self.filter_params.append('{0}:{1}'.format(key, value))
+
+        # If we are filtering by uuid:, do not use uuid keyword
+        # due to TW-1452 bug
+        if key == 'uuid':
+            self.filter_params.insert(0, value)
+        else:
+            self.filter_params.append('{0}:{1}'.format(key, value))

 
     def get_filter_params(self):
         return [f for f in self.filter_params if f]
 
     def get_filter_params(self):
         return [f for f in self.filter_params if f]


@@ -401,6 +482,7 @@ class TaskWarrior(object):
             'data.location': os.path.expanduser(data_location),
         }
         self.tasks = TaskQuerySet(self)
             'data.location': os.path.expanduser(data_location),
         }
         self.tasks = TaskQuerySet(self)

+        self.version = self._get_version()

 
     def _get_command_args(self, args, config_override={}):
         command_args = ['task', 'rc:/']
 
     def _get_command_args(self, args, config_override={}):
         command_args = ['task', 'rc:/']


@@ -411,6 +493,14 @@ class TaskWarrior(object):
         command_args.extend(map(str, args))
         return command_args
 
         command_args.extend(map(str, args))
         return command_args
 

+    def _get_version(self):
+        p = subprocess.Popen(
+                ['task', '--version'],
+                stdout=subprocess.PIPE,
+                stderr=subprocess.PIPE)
+        stdout, stderr = [x.decode('utf-8') for x in p.communicate()]
+        return stdout.strip('\n')
+

     def execute_command(self, args, config_override={}):
         command_args = self._get_command_args(
             args, config_override=config_override)
     def execute_command(self, args, config_override={}):
         command_args = self._get_command_args(
             args, config_override=config_override)