Don't explicitly require six==1.5.2 to avoid VersionConflict error

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

diff --git a/tasklib/task.py b/tasklib/task.py
index cd4b92f1d3af491bc001229406ac26f3e509c5a7..bb3fa537438250a7153f3aa214138bbba65819dc 100644 (file)
--- a/tasklib/task.py
+++ b/tasklib/task.py
@@ -1,54 +1,270 @@
+from __future__ import print_function

 import copy
 import copy

+import datetime

 import json
 import json

+import logging

 import os
 import os

+import six

 import subprocess
 import subprocess

-import tempfile
-import uuid
-

 
 

+DATE_FORMAT = '%Y%m%dT%H%M%SZ'

 REPR_OUTPUT_SIZE = 10
 PENDING = 'pending'
 REPR_OUTPUT_SIZE = 10
 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__)

 
 
 class TaskWarriorException(Exception):
     pass
 
 
 
 
 class TaskWarriorException(Exception):
     pass
 
 

-class Task(object):
+class TaskResource(object):
+    read_only_fields = []
+
+    def _load_data(self, data):
+        self._data = data
+
+    def __getitem__(self, key):
+        hydrate_func = getattr(self, 'deserialize_{0}'.format(key),
+                               lambda x: x)
+        return hydrate_func(self._data.get(key))
+
+    def __setitem__(self, key, value):
+        if key in self.read_only_fields:
+            raise RuntimeError('Field \'%s\' is read-only' % key)
+        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__())
+        if not six.PY3:
+            s = s.encode('utf-8')
+        return s
+
+    def __repr__(self):
+        return str(self)
+
+
+class TaskAnnotation(TaskResource):
+    read_only_fields = ['entry', 'description']
+
+    def __init__(self, task, data={}):
+        self.task = task
+        self._load_data(data)
+
+    def deserialize_entry(self, data):
+        return datetime.datetime.strptime(data, DATE_FORMAT) if data else None
+
+    def serialize_entry(self, date):
+        return date.strftime(DATE_FORMAT) if date else ''
+
+    def remove(self):
+        self.task.remove_annotation(self)
+
+    def __unicode__(self):
+        return self['description']
+
+    __repr__ = __unicode__
+
+
+class Task(TaskResource):
+    read_only_fields = ['id', 'entry', 'urgency', 'uuid']

 
     class DoesNotExist(Exception):
         pass
 
 
     class DoesNotExist(Exception):
         pass
 

-    def __init__(self, warrior, data={}):
+    class CompletedTask(Exception):
+        """
+        Raised when the operation cannot be performed on the completed task.
+        """
+        pass
+
+    class DeletedTask(Exception):
+        """
+        Raised when the operation cannot be performed on the deleted task.
+        """
+        pass
+
+    class NotSaved(Exception):
+        """
+        Raised when the operation cannot be performed on the task, because
+        it has not been saved to TaskWarrior yet.
+        """
+        pass
+
+    def __init__(self, warrior, data={}, **kwargs):

         self.warrior = warrior
         self.warrior = warrior

-        self._data = data

 
 

-    def __getitem__(self, key):
-        return self._data.get(key)
+        # We keep data for backwards compatibility
+        kwargs.update(data)

 
 

-    def __setitem__(self, key, val):
-        self._data[key] = val
+        self._load_data(kwargs)
+        self._modified_fields = set()

 
     def __unicode__(self):
 
     def __unicode__(self):

-        return self._data.get('description')
+        return self['description']

 
 

-    def regenerate_uuid(self):
-        self['uuid'] = str(uuid.uuid4())
+    @property
+    def completed(self):
+        return self['status'] == six.text_type('completed')
+
+    @property
+    def deleted(self):
+        return self['status'] == six.text_type('deleted')
+
+    @property
+    def waiting(self):
+        return self['status'] == six.text_type('waiting')
+
+    @property
+    def pending(self):
+        return self['status'] == six.text_type('pending')
+
+    @property
+    def saved(self):
+        return self['uuid'] is not None or self['id'] is not None
+
+    def serialize_due(self, date):
+        return date.strftime(DATE_FORMAT)
+
+    def deserialize_due(self, date_str):
+        if not date_str:
+            return None
+        return datetime.datetime.strptime(date_str, DATE_FORMAT)
+
+    def deserialize_annotations(self, data):
+        return [TaskAnnotation(self, d) for d in data] if data else []
+
+    def deserialize_tags(self, tags):
+        if isinstance(tags, basestring):
+            return tags.split(',') if tags else []
+        return tags
+
+    def serialize_tags(self, tags):
+        return ','.join(tags) if tags else ''

 
     def delete(self):
 
     def delete(self):

-        self.warrior.delete_task(self['uuid'])
+        if not self.saved:
+            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:
+            raise Task.DeletedTask("Task was already deleted")
+
+        self.warrior.execute_command([self['uuid'], 'delete'], config_override={
+            'confirmation': 'no',
+        })
+
+        # Refresh the status again, so that we have updated info stored
+        self.refresh(only_fields=['status'])
+

 
     def done(self):
 
     def done(self):

-        self.warrior.complete_task(self['uuid'])
+        if not self.saved:
+            raise Task.NotSaved("Task needs to be saved before it can be completed")

 
 

-    def save(self, delete_first=True):
-        if self['uuid'] and delete_first:
-            self.delete()
-        if not self['uuid'] or delete_first:
-            self.regenerate_uuid()
-        self.warrior.import_tasks([self._data])
+        # Refresh, and raise exception if task is already completed/deleted
+        self.refresh(only_fields=['status'])

 
 

-    __repr__ = __unicode__
+        if self.completed:
+            raise Task.CompletedTask("Cannot complete a completed task")
+        elif self.deleted:
+            raise Task.DeletedTask("Deleted task cannot be completed")
+
+        self.warrior.execute_command([self['uuid'], 'done'])
+
+        # Refresh the status again, so that we have updated info stored
+        self.refresh(only_fields=['status'])
+
+    def save(self):
+        args = [self['uuid'], 'modify'] if self.saved else ['add']
+        args.extend(self._get_modified_fields_as_args())
+        output = self.warrior.execute_command(args)
+
+        # Parse out the new ID, if the task is being added for the first time
+        if not self.saved:
+            id_lines = [l for l in output if l.startswith('Created task ')]
+
+            # Complain loudly if it seems that more tasks were created
+            # Should not happen
+            if len(id_lines) != 1 or len(id_lines[0].split(' ')) != 3:
+                raise TaskWarriorException("Unexpected output when creating "
+                                           "task: %s" % '\n'.join(id_lines))
+
+            # 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:
+            raise Task.NotSaved("Task needs to be saved to add annotation")
+
+        args = [self['uuid'], 'annotate', annotation]
+        self.warrior.execute_command(args)
+        self.refresh(only_fields=['annotations'])
+
+    def remove_annotation(self, annotation):
+        if not self.saved:
+            raise Task.NotSaved("Task needs to be saved to add annotation")
+
+        if isinstance(annotation, TaskAnnotation):
+            annotation = annotation['description']
+        args = [self['uuid'], 'denotate', annotation]
+        self.warrior.execute_command(args)
+        self.refresh(only_fields=['annotations'])
+
+    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])
+            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:
+                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
+                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:
+            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
+        # with using UUID only.
+        args = [self['uuid'] or self['id'], 'export']
+        new_data = json.loads(self.warrior.execute_command(args)[0])
+        if only_fields:
+            to_update = dict(
+                [(k, new_data.get(k)) for k in only_fields])
+            self._data.update(to_update)
+        else:
+            self._data = new_data

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


@@ -56,18 +272,32 @@ class TaskFilter(object):
     A set of parameters to filter the task list with.
     """
 
     A set of parameters to filter the task list with.
     """
 

-    def __init__(self, filter_params=()):
+    def __init__(self, filter_params=[]):

         self.filter_params = filter_params
 
         self.filter_params = filter_params
 

-    def add_filter(self, param, value):
-        self.filter_params += ((param, value),)
+    def add_filter(self, filter_str):
+        self.filter_params.append(filter_str)
+
+    def add_filter_param(self, key, value):
+        key = key.replace('__', '.')
+
+        # Replace the value with empty string, since that is the
+        # convention in TW for empty values
+        value = value if value is not None else ''
+
+        # 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):
 
     def get_filter_params(self):

-        return self.filter_params
+        return [f for f in self.filter_params if f]

 
     def clone(self):
         c = self.__class__()
 
     def clone(self):
         c = self.__class__()

-        c.filter_params = tuple(self.filter_params)
+        c.filter_params = list(self.filter_params)

         return c
 
 
         return c
 
 


@@ -86,8 +316,8 @@ class TaskQuerySet(object):
         Deep copy of a QuerySet doesn't populate the cache
         """
         obj = self.__class__()
         Deep copy of a QuerySet doesn't populate the cache
         """
         obj = self.__class__()

-        for k,v in self.__dict__.items():
-            if k in ('_iter','_result_cache'):
+        for k, v in self.__dict__.items():
+            if k in ('_iter', '_result_cache'):

                 obj.__dict__[k] = None
             else:
                 obj.__dict__[k] = copy.deepcopy(v, memo)
                 obj.__dict__[k] = None
             else:
                 obj.__dict__[k] = copy.deepcopy(v, memo)


@@ -138,7 +368,7 @@ class TaskQuerySet(object):
         """
         Fetch the tasks which match the current filters.
         """
         """
         Fetch the tasks which match the current filters.
         """

-        return self.warrior._execute_filter(self.filter_obj)
+        return self.warrior.filter_tasks(self.filter_obj)

 
     def all(self):
         """
 
     def all(self):
         """


@@ -149,13 +379,18 @@ class TaskQuerySet(object):
     def pending(self):
         return self.filter(status=PENDING)
 
     def pending(self):
         return self.filter(status=PENDING)
 

-    def filter(self, **kwargs):
+    def completed(self):
+        return self.filter(status=COMPLETED)
+
+    def filter(self, *args, **kwargs):

         """
         Returns a new TaskQuerySet with the given filters added.
         """
         clone = self._clone()
         """
         Returns a new TaskQuerySet with the given filters added.
         """
         clone = self._clone()

-        for param, value in kwargs.items():
-            clone.filter_obj.add_filter(param, value)
+        for f in args:
+            clone.filter_obj.add_filter(f)
+        for key, value in kwargs.items():
+            clone.filter_obj.add_filter_param(key, value)

         return clone
 
     def get(self, **kwargs):
         return clone
 
     def get(self, **kwargs):


@@ -177,62 +412,67 @@ class TaskQuerySet(object):
 
 
 class TaskWarrior(object):
 
 
 class TaskWarrior(object):

-    DEFAULT_FILTERS = {
-        'status': 'pending',
-    }
-

     def __init__(self, data_location='~/.task', create=True):
     def __init__(self, data_location='~/.task', create=True):

-        if not os.path.exists(data_location):
+        data_location = os.path.expanduser(data_location)
+        if create and not os.path.exists(data_location):

             os.makedirs(data_location)
         self.config = {
             'data.location': os.path.expanduser(data_location),
         }
         self.tasks = TaskQuerySet(self)
             os.makedirs(data_location)
         self.config = {
             'data.location': os.path.expanduser(data_location),
         }
         self.tasks = TaskQuerySet(self)

-
-    def _generate_command(self, command):
-        args = ['task', 'rc:/']
-        for item in self.config.items():
-            args.append('rc.{0}={1}'.format(*item))
-        args.append(command)
-        return ' '.join(args)
-
-    def _execute_command(self, command):
-        p = subprocess.Popen(self._generate_command(command), shell=True,
-                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-        stdout, stderr = p.communicate()
+        self.version = self._get_version()
+
+    def _get_command_args(self, args, config_override={}):
+        command_args = ['task', 'rc:/']
+        config = self.config.copy()
+        config.update(config_override)
+        for item in config.items():
+            command_args.append('rc.{0}={1}'.format(*item))
+        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)
+        logger.debug(' '.join(command_args))
+        p = subprocess.Popen(command_args, stdout=subprocess.PIPE,
+                             stderr=subprocess.PIPE)
+        stdout, stderr = [x.decode('utf-8') for x in p.communicate()]

         if p.returncode:
         if p.returncode:

-            raise TaskWarriorException(stderr.strip())
+            if stderr.strip():
+                error_msg = stderr.strip().splitlines()[-1]
+            else:
+                error_msg = stdout.strip()
+            raise TaskWarriorException(error_msg)

         return stdout.strip().split('\n')
 
         return stdout.strip().split('\n')
 

-    def _format_filter_kwarg(self, kwarg):
-        key, val = kwarg[0], kwarg[1]
-        key = key.replace('__', '.')
-        return '{0}:{1}'.format(key, val)
-
-    def _execute_filter(self, filter_obj):
-        filter_commands = ' '.join(map(self._format_filter_kwarg,
-                                       filter_obj.get_filter_params()))
-        command = '{0} export'.format(filter_commands)
+    def filter_tasks(self, filter_obj):
+        args = ['export', '--'] + filter_obj.get_filter_params()

         tasks = []
         tasks = []

-        for line in self._execute_command(command):
+        for line in self.execute_command(args):

             if line:
             if line:

-                tasks.append(Task(self, json.loads(line.strip(','))))
+                data = line.strip(',')
+                try:
+                    tasks.append(Task(self, json.loads(data)))
+                except ValueError:
+                    raise TaskWarriorException('Invalid JSON: %s' % data)

         return tasks
 
         return tasks
 

-    def add_task(self, description, project=None):
-        args = ['add', description]
-        if project is not None:
-            args.append('project:{0}'.format(project))
-        self._execute_command(' '.join(args))
-
-    def delete_task(self, task_id):
-        self._execute_command('{0} rc.confirmation:no delete'.format(task_id))
-
-    def complete_task(self, task_id):
-        self._execute_command('{0} done'.format(task_id))
+    def merge_with(self, path, push=False):
+        path = path.rstrip('/') + '/'
+        self.execute_command(['merge', path], config_override={
+            'merge.autopush': 'yes' if push else 'no',
+        })

 
 

-    def import_tasks(self, tasks):
-        fd, path = tempfile.mkstemp()
-        with open(path, 'w') as f:
-            f.write(json.dumps(tasks))
-        self._execute_command('import {0}'.format(path))
+    def undo(self):
+        self.execute_command(['undo'], config_override={
+            'confirmation': 'no',
+        })