module Hasql.Transaction.Private.SQL where

import ByteString.TreeBuilder qualified as D
import Hasql.Transaction.Config
import Hasql.Transaction.Private.Prelude

beginTransaction :: IsolationLevel -> Mode -> ByteString
beginTransaction :: IsolationLevel -> Mode -> ByteString
beginTransaction IsolationLevel
isolation Mode
mode =
  Builder -> ByteString
D.toByteString Builder
builder
  where
    builder :: Builder
builder =
      Builder
"BEGIN " Builder -> Builder -> Builder
forall a. Semigroup a => a -> a -> a
<> Builder
isolationBuilder Builder -> Builder -> Builder
forall a. Semigroup a => a -> a -> a
<> Builder
" " Builder -> Builder -> Builder
forall a. Semigroup a => a -> a -> a
<> Builder
modeBuilder
      where
        isolationBuilder :: Builder
isolationBuilder =
          case IsolationLevel
isolation of
            IsolationLevel
ReadCommitted -> Builder
"ISOLATION LEVEL READ COMMITTED"
            IsolationLevel
RepeatableRead -> Builder
"ISOLATION LEVEL REPEATABLE READ"
            IsolationLevel
Serializable -> Builder
"ISOLATION LEVEL SERIALIZABLE"
        modeBuilder :: Builder
modeBuilder =
          case Mode
mode of
            Mode
Write -> Builder
"READ WRITE"
            Mode
Read -> Builder
"READ ONLY"