66 lines
2.6 KiB
Haskell
66 lines
2.6 KiB
Haskell
module Main where
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import qualified Data.Text as Text
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import Data.Char (toLower)
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import Data.List (nub)
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import Data.Monoid ((<>))
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import Control.Monad (forM_)
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import System.Directory (createDirectoryIfMissing)
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import System.FilePath ((</>), (<.>))
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import System.Exit (exitFailure, exitSuccess)
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import Ringo
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import Ringo.ArgParser
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import Ringo.InputParser
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data SQLType = Create | FullRefresh | IncRefresh deriving (Eq, Show)
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main :: IO ()
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main = do
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ProgArgs {..} <- parseArgs
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result <- parseInput progInputFile
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case result of
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Left err -> putStrLn err >> exitFailure
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Right (tables, facts) -> do
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let env = Env tables facts progSettings
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let errors = nub $ concatMap (validateTable env) tables ++ concatMap (validateFact env) facts
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if not $ null errors
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then mapM_ print errors >> exitFailure
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else writeSQLFiles progOutputDir env >> exitSuccess
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writeSQLFiles :: FilePath -> Env -> IO ()
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writeSQLFiles outputDir env@Env{..} = forM_ sqls $ \(sqlType, table, sql) -> do
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let dirName = outputDir </> map toLower (show sqlType)
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fileName = dirName </> Text.unpack table <.> "sql"
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createDirectoryIfMissing True dirName
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writeFile fileName sql
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where
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dimTables = [ (fact, extractDimensionTables env fact) | fact <- envFacts ]
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factTables = [ (fact, extractFactTable env fact) | fact <- envFacts ]
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dimTableDefnSQLs = [ (Create, tableName table, unlines . map sqlStr . tableDefnSQL $ table)
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| (_, tabs) <- dimTables
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, table <- tabs
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, table `notElem` envTables ]
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factTableDefnSQLs = [ (Create , tableName table, unlines . map sqlStr $ factTableDefnSQL env fact table)
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| (fact, table) <- factTables ]
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dimTablePopulateSQLs typ gen = [ (typ , tableName table, sqlStr $ gen env fact (tableName table))
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| (fact, tabs) <- dimTables
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, table <- tabs
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, table `notElem` envTables ]
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factTableInsertSQLs = [ (FullRefresh, tableName table, sqlStr $ factTableInsertSQL env fact)
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| (fact, table) <- factTables ]
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sqls = concat [ dimTableDefnSQLs
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, factTableDefnSQLs
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, dimTablePopulateSQLs FullRefresh $ dimensionTablePopulateSQL FullPopulation
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, dimTablePopulateSQLs IncRefresh $ dimensionTablePopulateSQL IncrementalPopulation
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, factTableInsertSQLs
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]
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sqlStr s = Text.unpack $ s <> ";\n"
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