Experimental changes to Vervis.

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src / Vervis /

TicketFilter.hs

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{- This file is part of Vervis.
 -
 - Written in 2016, 2018 by fr33domlover <fr33domlover@riseup.net>.
 -
 - ♡ Copying is an act of love. Please copy, reuse and share.
 -
 - The author(s) have dedicated all copyright and related and neighboring
 - rights to this software to the public domain worldwide. This software is
 - distributed without any warranty.
 -
 - You should have received a copy of the CC0 Public Domain Dedication along
 - with this software. If not, see
 - <http://creativecommons.org/publicdomain/zero/1.0/>.
 -}

module Vervis.TicketFilter
    ( TicketFilter (..)
    , filterTickets
    )
where

import Prelude

import Data.Default.Class
import Database.Esqueleto

import Vervis.Model
import Vervis.Model.Ticket

data TicketFilter = TicketFilter
    { tfStatus :: Maybe TicketStatus
    }

instance Default TicketFilter where
    def = TicketFilter
        { tfStatus = Nothing
        }

filterTickets
    :: Esqueleto q e b
    => TicketFilter
    -> Maybe (e (Entity Ticket) -> e (Value Bool))
filterTickets tf =
    case tfStatus tf of
        Nothing -> Nothing
        Just s  -> Just $ \ t -> t ^. TicketStatus ==. val s
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