Task: Make sure empty values are not passed to TW via hooks

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

diff --git a/tasklib/task.py b/tasklib/task.py
index b1af4f743014a25ad33a73cbe5ee64e5f759b5d9..0b18a14a5d1bcdbe1f77cc58344a1695e1fa79a8 100644 (file)
--- a/tasklib/task.py
+++ b/tasklib/task.py
@@ -5,6 +5,7 @@ import json
 import logging
 import os
 import six
 import logging
 import os
 import six

+import sys

 import subprocess
 
 DATE_FORMAT = '%Y%m%dT%H%M%SZ'
 import subprocess
 
 DATE_FORMAT = '%Y%m%dT%H%M%SZ'


@@ -93,9 +94,9 @@ class SerializingObject(object):
         return ','.join(tags) if tags else ''
 
     def deserialize_tags(self, tags):
         return ','.join(tags) if tags else ''
 
     def deserialize_tags(self, tags):

-        if isinstance(tags, basestring):
+        if isinstance(tags, six.string_types):

             return tags.split(',') if tags else []
             return tags.split(',') if tags else []

-        return tags
+        return tags or []

 
     def serialize_depends(self, cur_dependencies):
         # Return the list of uuids
 
     def serialize_depends(self, cur_dependencies):
         # Return the list of uuids


@@ -111,11 +112,11 @@ class TaskResource(SerializingObject):
     read_only_fields = []
 
     def _load_data(self, data):
     read_only_fields = []
 
     def _load_data(self, data):

-        self._data = data
+        self._data = dict((key, self._deserialize(key, value))
+                          for key, value in data.items())

         # We need to use a copy for original data, so that changes
         # We need to use a copy for original data, so that changes

-        # are not propagated. Shallow copy is alright, since data dict uses only
-        # primitive data types
-        self._original_data = data.copy()
+        # are not propagated.
+        self._original_data = copy.deepcopy(self._data)

 
     def _update_data(self, data, update_original=False):
         """
 
     def _update_data(self, data, update_original=False):
         """


@@ -123,11 +124,12 @@ class TaskResource(SerializingObject):
         updates should already be serialized. If update_original is True, the
         original_data dict is updated as well.
         """
         updates should already be serialized. If update_original is True, the
         original_data dict is updated as well.
         """

-
-        self._data.update(data)
+        self._data.update(dict((key, self._deserialize(key, value))
+                               for key, value in data.items()))

 
         if update_original:
 
         if update_original:

-            self._original_data.update(data)
+            self._original_data = copy.deepcopy(self._data)
+

 
     def __getitem__(self, key):
         # This is a workaround to make TaskResource non-iterable
 
     def __getitem__(self, key):
         # This is a workaround to make TaskResource non-iterable


@@ -138,12 +140,15 @@ class TaskResource(SerializingObject):
         except ValueError:
             pass
 
         except ValueError:
             pass
 

-        return self._deserialize(key, self._data.get(key))
+        if key not in self._data:
+            self._data[key] = self._deserialize(key, None)
+
+        return self._data.get(key)

 
     def __setitem__(self, key, value):
         if key in self.read_only_fields:
             raise RuntimeError('Field \'%s\' is read-only' % key)
 
     def __setitem__(self, key, value):
         if key in self.read_only_fields:
             raise RuntimeError('Field \'%s\' is read-only' % key)

-        self._data[key] = self._serialize(key, value)
+        self._data[key] = value

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


@@ -168,6 +173,11 @@ class TaskAnnotation(TaskResource):
     def __unicode__(self):
         return self['description']
 
     def __unicode__(self):
         return self['description']
 

+    def __eq__(self, other):
+        # consider 2 annotations equal if they belong to the same task, and
+        # their data dics are the same
+        return self.task == other.task and self._data == other._data
+

     __repr__ = __unicode__
 
 
     __repr__ = __unicode__
 
 


@@ -196,6 +206,40 @@ class Task(TaskResource):
         """
         pass
 
         """
         pass
 

+    @classmethod
+    def from_input(cls, input_file=sys.stdin, modify=None):
+        """
+        Creates a Task object, directly from the stdin, by reading one line.
+        If modify=True, two lines are used, first line interpreted as the
+        original state of the Task object, and second line as its new,
+        modified value. This is consistent with the TaskWarrior's hook
+        system.
+
+        Object created by this method should not be saved, deleted
+        or refreshed, as t could create a infinite loop. For this
+        reason, TaskWarrior instance is set to None.
+
+        Input_file argument can be used to specify the input file,
+        but defaults to sys.stdin.
+        """
+
+        # TaskWarrior instance is set to None
+        task = cls(None)
+
+        # Detect the hook type if not given directly
+        name = os.path.basename(sys.argv[0])
+        modify = name.startswith('on-modify') if modify is None else modify
+
+        # Load the data from the input
+        task._load_data(json.loads(input_file.readline().strip()))
+
+        # If this is a on-modify event, we are provided with additional
+        # line of input, which provides updated data
+        if modify:
+            task._update_data(json.loads(input_file.readline().strip()))
+
+        return task
+

     def __init__(self, warrior, **kwargs):
         self.warrior = warrior
 
     def __init__(self, warrior, **kwargs):
         self.warrior = warrior
 


@@ -239,6 +283,10 @@ class Task(TaskResource):
             if self._data.get(key) != self._original_data.get(key):
                 yield key
 
             if self._data.get(key) != self._original_data.get(key):
                 yield key
 

+    @property
+    def modified(self):
+        return bool(list(self._modified_fields))
+

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


@@ -276,8 +324,7 @@ class Task(TaskResource):
         # to keep a list of all depedencies in the _data dictionary,
         # not just currently added/removed ones
 
         # 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)
+        old_dependencies = self._original_data.get('depends', set())

 
         added = self['depends'] - old_dependencies
         removed = old_dependencies - self['depends']
 
         added = self['depends'] - old_dependencies
         removed = old_dependencies - self['depends']


@@ -330,6 +377,9 @@ class Task(TaskResource):
         self.refresh(only_fields=['status'])
 
     def save(self):
         self.refresh(only_fields=['status'])
 
     def save(self):

+        if self.saved and not self.modified:
+            return
+

         args = [self['uuid'], 'modify'] if self.saved else ['add']
         args.extend(self._get_modified_fields_as_args())
         output = self.warrior.execute_command(args)
         args = [self['uuid'], 'modify'] if self.saved else ['add']
         args.extend(self._get_modified_fields_as_args())
         output = self.warrior.execute_command(args)


@@ -347,6 +397,9 @@ 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('.'))
 

+        # Refreshing is very important here, as not only modification time
+        # is updated, but arbitrary attribute may have changed due hooks
+        # altering the data before saving

         self.refresh()
 
     def add_annotation(self, annotation):
         self.refresh()
 
     def add_annotation(self, annotation):


@@ -373,9 +426,13 @@ class Task(TaskResource):
         def add_field(field):
             # Add the output of format_field method to args list (defaults to
             # field:value)
         def add_field(field):
             # Add the output of format_field method to args list (defaults to
             # field:value)

-            format_default = lambda k: "{0}:'{1}'".format(k, self._data[k] or '')
+            serialized_value = self._serialize(field, self._data[field]) or ''
+            format_default = lambda: "{0}:{1}".format(
+                field,
+                "'{0}'".format(serialized_value) if serialized_value else ''
+            )

             format_func = getattr(self, 'format_{0}'.format(field),
             format_func = getattr(self, 'format_{0}'.format(field),

-                                  lambda: format_default(field))
+                                  format_default)

             args.append(format_func())
 
         # If we're modifying saved task, simply pass on all modified fields
             args.append(format_func())
 
         # If we're modifying saved task, simply pass on all modified fields


@@ -408,6 +465,20 @@ class Task(TaskResource):
         else:
             self._load_data(new_data)
 
         else:
             self._load_data(new_data)
 

+    def export_data(self):
+        """
+        Exports current data contained in the Task as JSON
+        """
+
+        # We need to remove spaces for TW-1504, use custom separators
+        data_tuples = ((key, self._serialize(key, value))
+                       for key, value in six.iteritems(self._data))
+
+        # Empty string denotes empty serialized value, we do not want
+        # to pass that to TaskWarrior.
+        data_tuples = filter(lambda t: t[1] is not '', data_tuples)
+        data = dict(data_tuples)
+        return json.dumps(data, separators=(',',':'))

 
 class TaskFilter(SerializingObject):
     """
 
 class TaskFilter(SerializingObject):
     """


@@ -433,9 +504,15 @@ class TaskFilter(SerializingObject):
         if key == 'uuid':
             self.filter_params.insert(0, value)
         else:
         if key == 'uuid':
             self.filter_params.insert(0, value)
         else:

-            # We enforce equality match by using is keyword
-            # Also, without using this syntax, filter fails due to TW-1479
-            self.filter_params.append("{0}.is:'{1}'".format(key, value))
+            # Surround value with aphostrophes unless it's a empty string
+            value = "'%s'" % value if value else ''
+
+            # We enforce equality match by using 'is' (or 'none') modifier
+            # Without using this syntax, filter fails due to TW-1479
+            modifier = '.is' if value else '.none'
+            key = key + modifier if '.' not in key else key
+
+            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]


@@ -564,6 +641,7 @@ class TaskWarrior(object):
         self.config = {
             'data.location': os.path.expanduser(data_location),
             'confirmation': 'no',
         self.config = {
             'data.location': os.path.expanduser(data_location),
             'confirmation': 'no',

+            'dependency.confirmation': 'no', # See TW-1483 or taskrc man page

         }
         self.tasks = TaskQuerySet(self)
         self.version = self._get_version()
         }
         self.tasks = TaskQuerySet(self)
         self.version = self._get_version()