62 lines
2.0 KiB
Haskell
62 lines
2.0 KiB
Haskell
{-# LANGUAGE DeriveGeneric #-}
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{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE CPP #-}
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module Blog.Skin (
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Skin(..)
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, build
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) where
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import Arguments (Arguments)
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import qualified Arguments (bannerPath, favicon, cardImage, headPath, previewArticlesCount, previewLinesCount)
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import Control.Monad (filterM)
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import Data.Aeson (ToJSON(..), (.=), pairs)
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import Data.Maybe (listToMaybe)
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#if !MIN_VERSION_base(4,11,0)
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import Data.Monoid ((<>))
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#endif
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import Files (absoluteLink)
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import GHC.Generics (Generic)
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import Prelude hiding (head)
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import System.Directory (doesFileExist)
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import System.FilePath ((</>), (<.>))
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data Skin = Skin {
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banner :: Maybe String
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, cardImage :: Maybe FilePath
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, favicon :: Maybe FilePath
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, head :: Maybe String
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, previewArticlesCount :: Int
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, previewLinesCount :: Int
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} deriving Generic
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instance ToJSON Skin where
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toEncoding (Skin {previewArticlesCount, previewLinesCount}) = pairs (
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"previewArticlesCount" .= previewArticlesCount
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<> "previewLinesCount" .= previewLinesCount
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)
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findImage :: String -> Maybe FilePath -> IO (Maybe FilePath)
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findImage _ (Just path) = return . Just $ absoluteLink path
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findImage name Nothing =
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listToMaybe <$> filterM doesFileExist pathsToCheck
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where
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directories = [".", "image", "images", "pictures", "skin", "static"]
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extensions = ["ico", "gif", "jpeg", "jpg", "png", "svg"]
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pathsToCheck = [ dir </> name <.> ext | dir <- directories, ext <- extensions ]
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build :: String -> Arguments -> IO Skin
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build blogName arguments = do
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banner <- mapM readFile $ Arguments.bannerPath arguments
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cardImage <- findImage blogName $ Arguments.cardImage arguments
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favicon <- findImage "favicon" $ Arguments.favicon arguments
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head <- mapM readFile $ Arguments.headPath arguments
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return $ Skin {
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banner
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, cardImage
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, favicon
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, head
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, previewArticlesCount = Arguments.previewArticlesCount arguments
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, previewLinesCount = Arguments.previewLinesCount arguments
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}
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