diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,5 @@
+# Revision history for taskwarrior
+
+## 0.1.0.0 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.
diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,661 @@
+ GNU AFFERO GENERAL PUBLIC LICENSE
+ Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
+
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+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+
+ Copyright (C)
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero 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 Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see .
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source. For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code. There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+.
diff --git a/README.md b/README.md
new file mode 100644
--- /dev/null
+++ b/README.md
@@ -0,0 +1,34 @@
+# taskwarrior
+
+[](https://hackage.haskell.org/package/taskwarrior)
+[](https://actions-badge.atrox.dev/maralorn/haskell-taskwarrior/goto?ref=master)
+[](http://packdeps.haskellers.com/reverse/taskwarrior)
+
+## About
+
+[Taskwarrior](https://taskwarrior.org) is a feature rich command-line task management tool.
+
+This Haskell library contains
+
+* a data type to represent a taskwarrior task
+* Aeson instances to deserialize and serialize a task according to the taskwarrior import/export specifications
+* IO actions to load and manipulate tasks by calling the `task` command. (Since this is the encouraged way to library design by the taskwarrior developers.)
+
+## Usage
+
+Install `taskwarrior` from hackage. Have a look at `Taskwarrior.IO.getTasks` to get started.
+
+This example prints the description of (at the most) 5 pending tasks.
+```haskell
+import Taskwarrior.IO (getTasks)
+import Taskwarrior.Task as Task
+
+main :: IO ()
+main = do
+ tasks <- getTasks ["+PENDING", "limit:5"]
+ print $ Task.description <$> tasks
+```
+
+## Contributions
+
+Any form of issue reports, general feedback or suggestions and of course code contributions are highly welcome.
diff --git a/src/Taskwarrior/Annotation.hs b/src/Taskwarrior/Annotation.hs
new file mode 100644
--- /dev/null
+++ b/src/Taskwarrior/Annotation.hs
@@ -0,0 +1,27 @@
+{-# LANGUAGE RecordWildCards, ScopedTypeVariables #-}
+-- |
+module Taskwarrior.Annotation
+ ( Annotation(..)
+ )
+where
+
+import qualified Taskwarrior.Time as Time
+import Data.Time ( UTCTime )
+import Data.Text ( Text )
+import Data.Aeson ( (.:)
+ , (.=)
+ )
+import qualified Data.Aeson as Aeson
+
+-- |
+data Annotation = Annotation { entry :: UTCTime, description :: Text } deriving (Eq, Show, Read, Ord)
+
+instance Aeson.FromJSON Annotation where
+ parseJSON = Aeson.withObject "Annotation" $ \o -> do
+ description <- o .: "description"
+ entry <- o .: "entry" >>= Time.parse
+ pure Annotation { .. }
+
+instance Aeson.ToJSON Annotation where
+ toJSON Annotation {..} =
+ Aeson.object ["description" .= description, "entry" .= Time.toValue entry]
diff --git a/src/Taskwarrior/IO.hs b/src/Taskwarrior/IO.hs
new file mode 100644
--- /dev/null
+++ b/src/Taskwarrior/IO.hs
@@ -0,0 +1,52 @@
+-- | This modules contains IO actions to interact with the taskwarrior application.
+-- The taskwarrior documentation very explicitly disallows accessing the files by itself.
+-- So all functions here work via calling the `task` binary which needs to be in the PATH.
+module Taskwarrior.IO
+ ( getTasks
+ , saveTasks
+ )
+where
+
+import Taskwarrior.Task ( Task )
+import Data.Text ( Text )
+import qualified Data.Text as Text
+import qualified Data.ByteString.Lazy as LBS
+import qualified Data.Aeson as Aeson
+import System.Process ( withCreateProcess
+ , CreateProcess(..)
+ , proc
+ , StdStream(..)
+ , waitForProcess
+ )
+import System.IO ( hClose )
+import System.Exit ( ExitCode(..) )
+import Control.Monad ( when )
+
+-- | Uses task export with a given filter like ["description:Milk", "+PENDING"].
+getTasks :: [Text] -> IO [Task]
+getTasks args =
+ withCreateProcess
+ ((proc "task" (fmap Text.unpack . (++ ["export"]) $ args))
+ { std_out = CreatePipe
+ }
+ )
+ $ \_ stdoutMay _ _ -> do
+ stdout <- maybe
+ (fail "Couldn‘t create stdout handle for `task export`")
+ pure
+ stdoutMay
+ input <- LBS.hGetContents stdout
+ either fail return . Aeson.eitherDecode $ input
+
+-- | Uses task import to save the given tasks.
+saveTasks :: [Task] -> IO ()
+saveTasks tasks =
+ withCreateProcess ((proc "task" ["import"]) { std_in = CreatePipe })
+ $ \stdinMay _ _ process -> do
+ stdin <- maybe (fail "Couldn‘t create stdin handle for `task import`")
+ pure
+ stdinMay
+ LBS.hPut stdin . Aeson.encode $ tasks
+ hClose stdin
+ exitCode <- waitForProcess process
+ when (exitCode /= ExitSuccess) $ fail . show $ exitCode
diff --git a/src/Taskwarrior/Mask.hs b/src/Taskwarrior/Mask.hs
new file mode 100644
--- /dev/null
+++ b/src/Taskwarrior/Mask.hs
@@ -0,0 +1,40 @@
+{-# LANGUAGE LambdaCase, QuasiQuotes #-}
+-- | The Mask module models the state a recurring parent saves about it‘s child tasks.
+module Taskwarrior.Mask
+ ( Mask(..)
+ , MaskState
+ )
+where
+
+import qualified Data.Text as Text
+import Data.String.Interpolate ( i )
+import qualified Data.Aeson as Aeson
+import qualified Data.Aeson.Types as Aeson.Types
+
+-- | Represents the state of a child in a recurring task.
+data MaskState = Pending | Completed | Deleted | Waiting deriving (Eq, Show, Enum, Read, Ord, Bounded)
+
+-- | The mask is a newtype to provide Aeson instances from and to a JSON string.
+newtype Mask = Mask {mask :: [MaskState]} deriving (Eq, Read, Ord, Show)
+
+toChar :: MaskState -> Char
+toChar = \case
+ Pending -> '.'
+ Completed -> '+'
+ Deleted -> 'X'
+ Waiting -> 'W'
+
+instance Aeson.FromJSON Mask where
+ parseJSON =
+ Aeson.withText "Mask" $ fmap Mask . traverse parseChar . Text.unpack
+
+parseChar :: Char -> Aeson.Types.Parser MaskState
+parseChar = \case
+ '.' -> pure Pending
+ '+' -> pure Completed
+ 'X' -> pure Deleted
+ 'W' -> pure Waiting
+ char -> fail [i|Not a Mask Char: '#{char}'|]
+
+instance Aeson.ToJSON Mask where
+ toJSON = Aeson.String . Text.pack . fmap toChar . mask
diff --git a/src/Taskwarrior/Priority.hs b/src/Taskwarrior/Priority.hs
new file mode 100644
--- /dev/null
+++ b/src/Taskwarrior/Priority.hs
@@ -0,0 +1,25 @@
+-- | This module provides the type for the priority of a task.
+module Taskwarrior.Priority (parseMay, Priority) where
+
+import qualified Data.Aeson as Aeson
+import Data.Aeson.Types ( Parser, typeMismatch )
+
+
+-- | A task can have the priorities high, medium, low or none, which is modeled via a Maybe Priority.
+data Priority = High | Medium | Low
+ deriving (Eq, Show, Read, Enum, Ord, Bounded)
+
+instance Aeson.ToJSON Priority where
+ toJSON = \case
+ High -> "H"
+ Medium -> "M"
+ Low -> "L"
+
+-- | Parses a JSON string to a Maybe Priority, fails on anything else.
+parseMay :: Aeson.Value -> Parser (Maybe Priority)
+parseMay val = Aeson.withText "Priority" (\case
+ "H" -> pure $ Just High
+ "M" -> pure $ Just Medium
+ "L" -> pure $ Just Low
+ "" -> pure Nothing
+ _ -> typeMismatch "Priority" val) val
diff --git a/src/Taskwarrior/Status.hs b/src/Taskwarrior/Status.hs
new file mode 100644
--- /dev/null
+++ b/src/Taskwarrior/Status.hs
@@ -0,0 +1,77 @@
+{-# LANGUAGE LambdaCase #-}
+-- | This module deals with information of a task which is dependent on the status.
+module Taskwarrior.Status
+ ( Status(..)
+ , parseFromObject
+ , toPairs
+ )
+where
+
+import Taskwarrior.Mask ( Mask )
+import qualified Taskwarrior.Time as Time
+import Data.Aeson ( Object
+ , (.:)
+ , (.=)
+ )
+import qualified Data.Aeson as Aeson
+import Control.Applicative ( (<|>) )
+import Data.Text ( Text )
+import Data.Time ( UTCTime )
+import Data.UUID ( UUID )
+import Data.Aeson.Types ( Parser
+ , typeMismatch
+ , Pair
+ )
+-- | A task can be pending, deleted, completed, waiting or recurring.
+-- If I task is a recurring child or a recurring parent depends on the existence of the corresponding fields and can not be told from the status field alone.
+-- It is recommended to access the fields only by pattern matching since the getters are partial.
+data Status =
+ Pending |
+ Deleted { end :: UTCTime } |
+ Completed { end :: UTCTime } |
+ Waiting { wait :: UTCTime } |
+ RecurringParent {
+ recur :: Text,
+ mask :: Mask} |
+ RecurringChild {
+ recur :: Text,
+ imask :: Integer,
+ parent :: UUID }
+ deriving (Eq, Show, Read, Ord)
+
+parseFromObject, parseParentFromObject, parseChildFromObject
+ :: Object -> Parser Status
+-- | Takes all information that is dependent on the status from a JSON object.
+parseFromObject o = (o .: "status") >>= \case
+ "pending" -> pure Pending
+ "deleted" -> Deleted <$> (o .: "end" >>= Time.parse)
+ "completed" -> Completed <$> (o .: "end" >>= Time.parse)
+ "waiting" -> Waiting <$> (o .: "wait" >>= Time.parse)
+ "recurring" -> parseParentFromObject o <|> parseChildFromObject o
+ str -> typeMismatch "status" (Aeson.String str)
+
+-- | Gathers all fields for a RecurringChild status.
+parseChildFromObject o =
+ RecurringChild <$> o .: "recur" <*> o .: "imask" <*> o .: "parent"
+
+-- | Gathers all fields for a RecurringParent status.
+parseParentFromObject o = RecurringParent <$> o .: "recur" <*> o .: "mask"
+
+-- | A list of Pairs can be used to construct a JSON object later. The result of Status.toPairs is supposed to be combined with the rest of the fields of a task.
+toPairs :: Status -> [Pair]
+toPairs = \case
+ Pending -> [statusLabel "pending"]
+ Deleted {..} -> [statusLabel "deleted", "end" .= Time.toValue end]
+ Completed {..} -> [statusLabel "completed", "end" .= Time.toValue end]
+ Waiting {..} -> [statusLabel "waiting", "wait" .= Time.toValue wait]
+ RecurringParent {..} ->
+ [statusLabel "recurring", "recur" .= recur, "mask" .= mask]
+ RecurringChild {..} ->
+ [ statusLabel "recurring"
+ , "recur" .= recur
+ , "imask" .= imask
+ , "parent" .= parent
+ ]
+ where
+ statusLabel :: Text -> Pair
+ statusLabel = ("status" .=)
diff --git a/src/Taskwarrior/Task.hs b/src/Taskwarrior/Task.hs
new file mode 100644
--- /dev/null
+++ b/src/Taskwarrior/Task.hs
@@ -0,0 +1,155 @@
+-- | This Module exports the main datatype of this library: Task.
+-- It is provided with FromJSON and ToJSON instances.
+module Taskwarrior.Task
+ ( Task(..)
+ , Tag
+ )
+where
+
+import qualified Data.Text as Text
+import Data.Text ( Text )
+import Data.Time ( UTCTime )
+import qualified Data.UUID as UUID
+import Data.UUID ( UUID )
+import qualified Data.Aeson as Aeson
+import qualified Data.Aeson.Types as Aeson.Types
+import Data.Aeson ( withObject
+ , withText
+ , FromJSON
+ , ToJSON
+ , parseJSON
+ , (.:)
+ , (.=)
+ , (.:?)
+ , Value
+ )
+import qualified Data.Semigroup as Semigroup
+import qualified Data.Maybe as Maybe
+import Control.Monad ( join )
+import qualified Data.Foldable as Foldable
+import Taskwarrior.Status ( Status )
+import qualified Taskwarrior.Status as Status
+import Taskwarrior.Priority ( Priority )
+import qualified Taskwarrior.Priority as Priority
+import Taskwarrior.UDA ( UDA )
+import Taskwarrior.Annotation ( Annotation )
+import qualified Taskwarrior.Time as Time
+import qualified Data.HashMap.Strict as HashMap
+import Foreign.Marshal.Utils ( fromBool )
+
+-- | A Task represents a task from taskwarrior. See for the specification of the fields.
+-- The specification demands, that the existence of some fields is dependent on the status of the task.
+-- Those fields are therefore bundled in status as a sum-type.
+--
+-- All fields in an imported task which are not part of the specification will be put in the UDA (user defined attributes) HashMap.
+--
+-- Since the json can have multiple semantically equivalent representations of a task first serializing and then deserializing is not identity.
+-- But deserializing and then serializing should be. (Thus making serializing and deserializing idempotent.)
+data Task = Task {
+ status :: Status,
+ uuid :: UUID,
+ entry :: UTCTime,
+ description :: Text,
+ start :: Maybe UTCTime,
+ modified :: Maybe UTCTime,
+ due :: Maybe UTCTime,
+ until :: Maybe UTCTime,
+ annotations :: [Annotation],
+ scheduled :: Maybe UTCTime,
+ project :: Maybe Text,
+ priority :: Maybe Priority,
+ depends :: [UUID],
+ tags :: [Tag],
+ uda :: UDA
+} deriving (Eq, Show, Read)
+
+-- | A Tag can be basically any string. But beware: Special symbols work but might clash with `task` cli syntax.
+type Tag = Text
+
+
+reservedKeys :: [Text]
+reservedKeys =
+ [ "status"
+ , "uuid"
+ , "description"
+ , "entry"
+ , "modified"
+ , "due"
+ , "until"
+ , "scheduled"
+ , "annotations"
+ , "start"
+ , "project"
+ , "priority"
+ , "depends"
+ , "tags"
+ , "wait"
+ , "end"
+ , "mask"
+ , "imask"
+ , "parent"
+ , "recur"
+ ]
+
+instance FromJSON Task where
+ parseJSON = withObject "Task" $ \object -> do
+ let parseTimeFromFieldMay = parseFromFieldWithMay Time.parse object
+ uda = HashMap.filterWithKey (\k _ -> k `notElem` reservedKeys) object
+ status <- Status.parseFromObject object
+ uuid <- object .: "uuid"
+ entry <- object .: "entry" >>= Time.parse
+ description <- object .: "description"
+ start <- parseTimeFromFieldMay "start"
+ modified <- parseTimeFromFieldMay "modified"
+ due <- parseTimeFromFieldMay "due"
+ until_ <- parseTimeFromFieldMay "until"
+ scheduled <- parseTimeFromFieldMay "scheduled"
+ annotations <- Foldable.fold <$> object .:? "annotations"
+ project <- object .:? "project"
+ priority <- join
+ <$> parseFromFieldWithMay Priority.parseMay object "priority"
+ depends <- maybe (pure []) parseUuidList (HashMap.lookup "depends" object)
+ tags <- Foldable.fold <$> object .:? "tags"
+ pure Task { until = until_, .. }
+
+parseFromFieldWithMay
+ :: (Value -> Aeson.Types.Parser a)
+ -> Aeson.Object
+ -> Text
+ -> Aeson.Types.Parser (Maybe a)
+parseFromFieldWithMay parser object name =
+ traverse parser (HashMap.lookup name object)
+
+parseUuidList :: Aeson.Value -> Aeson.Types.Parser [UUID]
+parseUuidList =
+ withText "Text" $ mapM (parseJSON . Aeson.String) . Text.splitOn ","
+
+instance ToJSON Task where
+ toJSON Task { until = until_, ..} =
+ Aeson.object
+ $ Status.toPairs status
+ <> [ "uuid" .= uuid
+ , "entry" .= Time.toValue entry
+ , "description" .= description
+ ]
+ <> ifNotNullList annotations ("annotations" .=)
+ <> Maybe.mapMaybe
+ (\(name, value) -> (name .=) . Time.toValue <$> value)
+ [ ("start" , start)
+ , ("modified" , modified)
+ , ("due" , due)
+ , ("scheduled", scheduled)
+ , ("until" , until_)
+ ]
+ <> Maybe.catMaybes
+ [("project" .=) <$> project, ("priority" .=) <$> priority]
+ <> ifNotNullList
+ depends
+ (("depends" .=) . Text.intercalate "," . fmap UUID.toText)
+ <> ifNotNullList tags ("tags" .=)
+ <> HashMap.toList uda
+
+ifNotNullList :: [b] -> ([b] -> a) -> [a]
+ifNotNullList list f =
+ (Semigroup.stimesMonoid . (fromBool :: Bool -> Integer) . not . null $ list)
+ [f list]
diff --git a/src/Taskwarrior/Time.hs b/src/Taskwarrior/Time.hs
new file mode 100644
--- /dev/null
+++ b/src/Taskwarrior/Time.hs
@@ -0,0 +1,34 @@
+-- | This module provides no own time type for taskwarrior rather it only gives deserialisation and serialisation support.
+module Taskwarrior.Time
+ ( parse
+ , toValue
+ )
+where
+import Data.Aeson ( withText )
+import qualified Data.Aeson as Aeson
+import Data.Aeson.Types ( Parser
+ , typeMismatch
+ )
+import Data.Time ( UTCTime
+ , parseTimeM
+ , defaultTimeLocale
+ )
+import qualified Data.Time.Format as Time.Format
+import qualified Data.Text as Text
+
+-- | Converts a time to the taskwarrior time format.
+toValue :: UTCTime -> Aeson.Value
+toValue time = Aeson.String . Text.pack $ Time.Format.formatTime
+ defaultTimeLocale
+ "%Y%m%dT%H%M%SZ"
+ time
+
+-- | Parses a JSON string from the taskwarrior time format.
+parse :: Aeson.Value -> Parser UTCTime
+parse value = withText
+ "Date"
+ ( maybe (typeMismatch "Date" value) pure
+ . parseTimeM False defaultTimeLocale "%Y%m%dT%H%M%SZ"
+ . Text.unpack
+ )
+ value
diff --git a/src/Taskwarrior/UDA.hs b/src/Taskwarrior/UDA.hs
new file mode 100644
--- /dev/null
+++ b/src/Taskwarrior/UDA.hs
@@ -0,0 +1,12 @@
+-- | User defined attributes are stored in a HashMap from Text to json Values because we have no type information about them.
+module Taskwarrior.UDA
+ ( UDA
+ )
+where
+
+import Data.Text ( Text )
+import Data.HashMap.Strict ( HashMap )
+import Data.Aeson ( Value )
+
+-- | A field will in practice only be a number or a string.
+type UDA = HashMap Text Value
diff --git a/taskwarrior.cabal b/taskwarrior.cabal
new file mode 100644
--- /dev/null
+++ b/taskwarrior.cabal
@@ -0,0 +1,74 @@
+cabal-version: 2.4
+name: taskwarrior
+
+-- PVP summary: +-+------- breaking API changes
+-- | | +----- non-breaking API additions
+-- | | | +--- code changes with no API change
+version: 0.1.0.0
+synopsis: Types and aeson instances for taskwarrior tasks
+description:
+ Types and aeson instances for the https://taskwarrior.org task import/export feature
+
+homepage: https://github.com/maralorn/haskell-taskwarrior
+bug-reports: https://github.com/maralorn/haskell-taskwarrior/issues
+license: AGPL-3.0-or-later
+license-file: LICENSE
+author: Malte Brandy
+maintainer: malte.brandy@maralorn.de
+category: Taskwarrior, Data
+extra-source-files:
+ CHANGELOG.md
+ README.md
+
+library
+ ghc-options: -Wall
+ exposed-modules:
+ Taskwarrior.Annotation
+ Taskwarrior.IO
+ Taskwarrior.Mask
+ Taskwarrior.Priority
+ Taskwarrior.Status
+ Taskwarrior.Task
+ Taskwarrior.Time
+ Taskwarrior.UDA
+
+ default-extensions:
+ LambdaCase
+ OverloadedStrings
+ QuasiQuotes
+ RecordWildCards
+
+ build-depends:
+ , aeson ^>=1.4.5.0
+ , base >=4.12 && <4.14
+ , bytestring ^>=0.10.8.2
+ , process ^>=1.6.5.0
+ , string-interpolate ^>=0.1.0.1
+ , text ^>=1.2.3.1
+ , time >=1.8.0.2 && <1.10
+ , unordered-containers ^>=0.2.10.0
+ , uuid ^>=1.3.13
+
+ hs-source-dirs: src
+ default-language: Haskell2010
+
+test-suite test-taskwarrior
+ ghc-options: -Wall -Wno-orphans
+ type: exitcode-stdio-1.0
+ hs-source-dirs: test
+ main-is: Spec.hs
+ build-tool-depends: hspec-discover:hspec-discover -any
+ other-modules: TaskSpec
+ build-depends:
+ , aeson
+ , base
+ , hspec ^>=2.7.1
+ , QuickCheck ^>=2.13.2
+ , quickcheck-instances ^>=0.3.22
+ , taskwarrior
+ , text
+ , time
+ , unordered-containers
+ , uuid
+
+ default-language: Haskell2010
diff --git a/test/Spec.hs b/test/Spec.hs
new file mode 100644
--- /dev/null
+++ b/test/Spec.hs
@@ -0,0 +1,1 @@
+{-# OPTIONS_GHC -F -pgmF hspec-discover #-}
diff --git a/test/TaskSpec.hs b/test/TaskSpec.hs
new file mode 100644
--- /dev/null
+++ b/test/TaskSpec.hs
@@ -0,0 +1,83 @@
+{-# LANGUAGE RecordWildCards #-}
+module TaskSpec
+ ( spec
+ )
+where
+
+import Test.Hspec
+import Test.QuickCheck
+import Data.Aeson
+import Taskwarrior.Task
+import Taskwarrior.Mask
+import Taskwarrior.Status
+import Taskwarrior.Annotation
+import Taskwarrior.Priority
+import Data.Time
+import qualified Data.HashMap.Strict as HashMap
+import Test.QuickCheck.Instances.Text ( )
+import Test.QuickCheck.Instances.UUID ( )
+import Test.QuickCheck.Instances.UnorderedContainers
+ ( )
+
+
+prop_taskDeEncode :: Task -> Property
+prop_taskDeEncode task = Just task === decode (encode task)
+
+prop_taskReadShow :: Task -> Property
+prop_taskReadShow task = task === (read . show $ task)
+
+spec :: Spec
+spec = do
+ it "will be the same after read . show" $ property prop_taskReadShow
+ it "will be the same after encoding to JSON and decoding"
+ $ property prop_taskDeEncode
+
+instance Arbitrary MaskState where
+ arbitrary = arbitraryBoundedEnum
+
+instance Arbitrary Mask where
+ arbitrary = Mask <$> (arbitrary :: Gen [MaskState])
+
+instance Arbitrary Status where
+ arbitrary = oneof
+ [ pure Pending
+ , Deleted <$> arbitrary
+ , Completed <$> arbitrary
+ , Waiting <$> arbitrary
+ , RecurringParent <$> arbitrary <*> arbitrary
+ , RecurringChild <$> arbitrary <*> arbitrary <*> arbitrary
+ ]
+
+instance Arbitrary UTCTime where
+ arbitrary = do
+ day <- ModifiedJulianDay <$> arbitrary
+ dayTime <- secondsToDiffTime <$> choose (0, 86400)
+ pure $ UTCTime day dayTime
+
+instance Arbitrary Annotation where
+ arbitrary = do
+ entry <- arbitrary
+ description <- arbitrary
+ pure Annotation { .. }
+
+instance Arbitrary Priority where
+ arbitrary = arbitraryBoundedEnum
+
+instance Arbitrary Task where
+ arbitrary = do
+ status <- arbitrary
+ uuid <- arbitrary
+ entry <- arbitrary
+ description <- arbitrary
+ start <- arbitrary
+ modified <- arbitrary
+ due <- arbitrary
+ until_ <- arbitrary
+ annotations <- arbitrary
+ scheduled <- arbitrary
+ project <- arbitrary
+ priority <- arbitrary
+ depends <- arbitrary
+ tags <- arbitrary
+ uda <- HashMap.fromList . fmap (\(x, y) -> (x, String y)) <$> arbitrary
+ pure Task { until = until_, .. }