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57 lines
1.3 KiB
Haskell
57 lines
1.3 KiB
Haskell
{- This file is part of Vervis.
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-
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- Written in 2016 by fr33domlover <fr33domlover@riseup.net>.
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-
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- ♡ Copying is an act of love. Please copy, reuse and share.
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-
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- The author(s) have dedicated all copyright and related and neighboring
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- rights to this software to the public domain worldwide. This software is
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- distributed without any warranty.
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-
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- You should have received a copy of the CC0 Public Domain Dedication along
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- with this software. If not, see
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- <http://creativecommons.org/publicdomain/zero/1.0/>.
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-}
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module Vervis.TicketFilter
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( TicketFilter (..)
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, filterTickets
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)
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where
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import Prelude
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import Data.Default.Class
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import Database.Esqueleto
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import Vervis.Model
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data TicketFilter = TicketFilter
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{ tfStatus :: Maybe Bool
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}
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instance Default TicketFilter where
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def = TicketFilter
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{ tfStatus = Nothing
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}
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ticketFilter
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:: Esqueleto q e b
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=> TicketFilter
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-> e (Entity Ticket)
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-> Maybe (e (Value Bool))
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ticketFilter tf ticket =
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case tfStatus tf of
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Nothing -> Nothing
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Just t -> Just $ ticket ^. TicketDone ==. val t
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filterTickets
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:: Esqueleto q e b
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=> TicketFilter
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-> e (Entity Ticket)
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-> e (Value Bool)
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-> e (Value Bool)
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filterTickets tf ticket cond =
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case ticketFilter tf ticket of
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Nothing -> cond
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Just f -> cond &&. f
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