taskwarrior (empty) → 0.1.0.0
raw patch · 14 files changed
+1280/−0 lines, 14 filesdep +QuickCheckdep +aesondep +base
Dependencies added: QuickCheck, aeson, base, bytestring, hspec, process, quickcheck-instances, string-interpolate, taskwarrior, text, time, unordered-containers, uuid
Files
- CHANGELOG.md +5/−0
- LICENSE +661/−0
- README.md +34/−0
- src/Taskwarrior/Annotation.hs +27/−0
- src/Taskwarrior/IO.hs +52/−0
- src/Taskwarrior/Mask.hs +40/−0
- src/Taskwarrior/Priority.hs +25/−0
- src/Taskwarrior/Status.hs +77/−0
- src/Taskwarrior/Task.hs +155/−0
- src/Taskwarrior/Time.hs +34/−0
- src/Taskwarrior/UDA.hs +12/−0
- taskwarrior.cabal +74/−0
- test/Spec.hs +1/−0
- test/TaskSpec.hs +83/−0
+ CHANGELOG.md view
@@ -0,0 +1,5 @@+# Revision history for taskwarrior++## 0.1.0.0 -- YYYY-mm-dd++* First version. Released on an unsuspecting world.
+ LICENSE view
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+ README.md view
@@ -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.
+ src/Taskwarrior/Annotation.hs view
@@ -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]
+ src/Taskwarrior/IO.hs view
@@ -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
+ src/Taskwarrior/Mask.hs view
@@ -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
+ src/Taskwarrior/Priority.hs view
@@ -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
+ src/Taskwarrior/Status.hs view
@@ -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" .=)
+ src/Taskwarrior/Task.hs view
@@ -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 <https://taskwarrior.org/docs/design/task.html> 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]
+ src/Taskwarrior/Time.hs view
@@ -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
+ src/Taskwarrior/UDA.hs view
@@ -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
+ taskwarrior.cabal view
@@ -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
+ test/Spec.hs view
@@ -0,0 +1,1 @@+{-# OPTIONS_GHC -F -pgmF hspec-discover #-}
+ test/TaskSpec.hs view
@@ -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_, .. }