69 lines
1.8 KiB
Haskell
69 lines
1.8 KiB
Haskell
module Handler.Utils.StudyFeatures
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( parseStudyFeatures
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, parseSubTermsSemester
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) where
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import Import.NoFoundation hiding (try, (<|>))
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import Text.Parsec
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import Text.Parsec.Text
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import Auth.LDAP (ldapUserSubTermsSemester, ldapUserStudyFeatures)
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import qualified Ldap.Client as Ldap
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parseStudyFeatures :: UserId -> UTCTime -> Text -> Either ParseError [StudyFeatures]
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parseStudyFeatures uId now = parse (pStudyFeatures uId now <* eof) (unpack key)
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where
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Ldap.Attr key = ldapUserStudyFeatures
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parseSubTermsSemester :: Text -> Either ParseError (StudySubTermsId, Int)
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parseSubTermsSemester = parse (pLMUTermsSemester <* eof) (unpack key)
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where
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Ldap.Attr key = ldapUserSubTermsSemester
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pStudyFeatures :: UserId -> UTCTime -> Parser [StudyFeatures]
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pStudyFeatures studyFeaturesUser studyFeaturesUpdated = do
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studyFeaturesDegree <- StudyDegreeKey' <$> pKey
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void $ string "$$"
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let
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pStudyFeature = do
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_ <- pKey -- "Fächergruppe"
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void $ char '!'
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_ <- pKey -- "Studienbereich"
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void $ char '!'
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studyFeaturesField <- StudyTermsKey' <$> pKey
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void $ char '!'
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studyFeaturesType <- pType
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void $ char '!'
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studyFeaturesSemester <- decimal
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let studyFeaturesValid = True
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studyFeaturesSubField = Nothing
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return StudyFeatures{..}
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pStudyFeature `sepBy1` char '#'
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pKey :: Parser Int
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pKey = decimal
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pType :: Parser StudyFieldType
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pType = FieldPrimary <$ try (string "HF")
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<|> FieldSecondary <$ try (string "NF")
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decimal :: Parser Int
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decimal = foldl' (\now next -> now * 10 + next) 0 <$> many1 digit'
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where
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digit' = dVal <$> digit
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dVal c = fromEnum c - fromEnum '0'
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pLMUTermsSemester :: Parser (StudySubTermsId, Int)
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pLMUTermsSemester = do
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subTermsKey <- StudySubTermsKey' <$> pKey
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void $ char '$'
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semester <- decimal
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return (subTermsKey, semester)
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