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author | Joris | 2020-01-30 11:35:31 +0000 |
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committer | Joris | 2020-01-30 11:35:31 +0000 |
commit | 960fa7cb7ae4c57d01306f78cd349f3a8337d0ab (patch) | |
tree | 5077cc720525fb025e4dba65a9a8b631862cbcc8 /src/server/Resource.hs | |
parent | 14bdbc8c937f5d0b35c61350dba28cb41c3737cd (diff) | |
parent | 6a04e640955051616c3ad0874605830c448f2d75 (diff) |
Merge branch 'with-ghcjs' into 'master'
Use Haskell on the frontend
See merge request guyonvarch/shared-cost!2
Diffstat (limited to 'src/server/Resource.hs')
-rw-r--r-- | src/server/Resource.hs | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/src/server/Resource.hs b/src/server/Resource.hs deleted file mode 100644 index f52bbfa..0000000 --- a/src/server/Resource.hs +++ /dev/null @@ -1,54 +0,0 @@ -module Resource - ( Resource - , resourceCreatedAt - , resourceEditedAt - , resourceDeletedAt - , Status(..) - , statuses - , groupByStatus - , statusDuring - ) where - -import Data.Maybe (fromMaybe) -import Data.Map (Map) -import qualified Data.Map as M -import Data.Time.Clock (UTCTime) - -class Resource a where - resourceCreatedAt :: a -> UTCTime - resourceEditedAt :: a -> Maybe UTCTime - resourceDeletedAt :: a -> Maybe UTCTime - -data Status = - Created - | Edited - | Deleted - deriving (Eq, Show, Read, Ord, Enum, Bounded) - -statuses :: [Status] -statuses = [minBound..] - -groupByStatus :: Resource a => UTCTime -> UTCTime -> [a] -> Map Status [a] -groupByStatus start end resources = - foldl - (\m resource -> - case statusDuring start end resource of - Just status -> M.insertWith (++) status [resource] m - Nothing -> m - ) - M.empty - resources - -statusDuring :: Resource a => UTCTime -> UTCTime -> a -> Maybe Status -statusDuring start end resource - | created && not deleted = Just Created - | not created && edited && not deleted = Just Edited - | not created && deleted = Just Deleted - | otherwise = Nothing - where - created = belongs (resourceCreatedAt resource) start end - edited = fromMaybe False (fmap (\t -> belongs t start end) $ resourceEditedAt resource) - deleted = fromMaybe False (fmap (\t -> belongs t start end) $ resourceDeletedAt resource) - -belongs :: UTCTime -> UTCTime -> UTCTime -> Bool -belongs time start end = time >= start && time < end |