61 lines
2.2 KiB
Haskell
61 lines
2.2 KiB
Haskell
module Ringo.Extractor.Internal where
|
|
|
|
import qualified Data.Map as Map
|
|
import qualified Data.Text as Text
|
|
|
|
import Control.Monad.Reader (Reader, asks)
|
|
import Data.Maybe (mapMaybe, fromMaybe, fromJust)
|
|
import Data.Monoid ((<>))
|
|
import Data.List (nub)
|
|
|
|
import Ringo.Types
|
|
import Ringo.Utils
|
|
|
|
extractDimensions :: Fact -> Table -> Reader Env [Table]
|
|
extractDimensions fact Table {..} = do
|
|
tables <- asks envTables
|
|
prefix <- settingDimPrefix <$> asks envSettings
|
|
return $ dimsFromIds tables ++ dimsFromVals prefix
|
|
where
|
|
dimsFromIds tables =
|
|
flip mapMaybe (factColumns fact) $ \fcol -> case fcol of
|
|
DimId d _ -> findTable d tables
|
|
_ -> Nothing
|
|
|
|
dimsFromVals prefix =
|
|
map (\(dim, cols) -> Table { tableName = prefix <> dim
|
|
, tableColumns = Column "id" "serial" NotNull : cols
|
|
, tableConstraints = [ PrimaryKey "id"
|
|
, UniqueKey (map columnName cols)
|
|
]
|
|
})
|
|
. Map.toList
|
|
. Map.mapWithKey (\dim ->
|
|
map (\col@Column {..} -> col { columnName = dimColumnName dim columnName })
|
|
. nub)
|
|
. Map.fromListWith (flip (++))
|
|
. mapMaybe (\fcol -> do
|
|
DimVal d col <- fcol
|
|
column <- findColumn col tableColumns
|
|
return (d, [ column ]))
|
|
. map Just
|
|
. factColumns
|
|
$ fact
|
|
|
|
dimColumnName :: Text.Text -> ColumnName -> ColumnName
|
|
dimColumnName dimName columnName =
|
|
fromMaybe columnName . Text.stripPrefix (dimName <> "_") $ columnName
|
|
|
|
extractAllDimensions :: Fact -> Table -> Reader Env [Table]
|
|
extractAllDimensions fact table = do
|
|
myDims <- extractDimensions fact table
|
|
parentDims <- concat <$> mapM extract (factParentNames fact)
|
|
return . nub $ myDims ++ parentDims
|
|
where
|
|
extract fName = do
|
|
tables <- asks envTables
|
|
facts <- asks envFacts
|
|
let pFact = fromJust . findFact fName $ facts
|
|
pFactTable = fromJust . findTable (factTableName pFact) $ tables
|
|
extractAllDimensions pFact pFactTable
|