1 files changed, 36 insertions, 0 deletions

diff --git a/scaffolder/src/Text/Edifact/Scaffolder/Messages/Types.hs b/scaffolder/src/Text/Edifact/Scaffolder/Messages/Types.hs
new file mode 100644
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--- /dev/null
+++ b/scaffolder/src/Text/Edifact/Scaffolder/Messages/Types.hs
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+{-# LANGUAGE DerivingStrategies         #-}
+{-# LANGUAGE GeneralizedNewtypeDeriving #-}
+
+module Text.Edifact.Scaffolder.Messages.Types where
+
+import           Text.Edifact.Scaffolder.Commons
+
+import           Data.Function                   (on)
+import           Data.Ord                        (comparing)
+
+newtype Dependency = Dependency { getElement :: Element } deriving newtype (Show, Ord, Eq)
+
+data Repetition = Repetition Presence Cardinality deriving Show
+
+data Positional = Positional { positionalPosition   :: Position
+                             , positionalRepetition :: Repetition
+                             } deriving (Show)
+
+instance Eq Positional where
+  (==) = (==) `on` positionalPosition
+
+instance Ord Positional where
+  compare = comparing positionalPosition
+
+data Element = Segment    SegmentCode Positional
+             | GroupStart GroupCode   Positional
+             | GroupEnd   GroupCode
+               deriving (Show, Ord, Eq)
+
+getSegment :: Element -> Maybe SegmentCode
+getSegment (Segment code _) = Just code
+getSegment _                = Nothing
+
+newtype Cardinality = Cardinality { getCardinality :: Int }
+  deriving stock (Show)
+  deriving newtype (Eq, Num)