Start worknig on templates

byg/src/FunctionImplementations/IO.hs

@@ -1,5 +1,6 @@
 module FunctionImplementations.IO
   ( ListDirectory(..)
+  , ReadTemplate(..)
   , ConvertImage(..)
   , SaveFile(..)
   , RunPandoc(..)
@@ -12,6 +13,10 @@ data ListDirectory = ListDirectory deriving (Show)
 instance IsFunctionIO ListDirectory FilePath [FilePath] where
   runFIO ListDirectory _path = undefined
 
+data ReadTemplate = ReadTemplate deriving (Show)
+instance IsFunctionIO ReadTemplate FilePath Template where
+  runFIO ReadTemplate _path = undefined
+
 data ConvertImage = ConvertImage deriving (Show)
 instance IsFunctionIO ConvertImage ((FilePath, FilePath), ImageConversionSettings) () where
   runFIO ConvertImage ((_, _), ResizeToWidth _)  = undefined

byg/src/Functions.hs

@@ -3,6 +3,7 @@ module Functions
   ( isImageFilename
   , convertedImageFilename
   , listDirectory
+  , readTemplate
   , convertImage
   , saveFile
   , runPandoc
@@ -16,6 +17,7 @@ isImageFilename = runFunction IsImageFilename
 convertedImageFilename = runFunction ConvertedImageFilename
 
 listDirectory = runFunctionIO ListDirectory
+readTemplate = runFunctionIO ReadTemplate
 convertImage = runFunctionIO ConvertImage
 saveFile = runFunctionIO SaveFile
 runPandoc = runFunctionIO RunPandoc

byg/src/Main.hs

@@ -4,8 +4,8 @@ import Types
 import ComputationM
 import Functions
 
-handleRecipeDir :: Token FilePath -> ComputationM ()
+handleRecipeDir :: Token Template -> Token FilePath -> ComputationM ()
-handleRecipeDir dir = do
+handleRecipeDir template dir = do
   dirContents <- listDirectory dir
   imageFilenames <- filterComputationM isImageFilename dirContents
   convertedImageFilenames <- mapComputationM convertedImageFilename imageFilenames
@@ -15,9 +15,11 @@ handleRecipeDir dir = do
 
 test :: ComputationM ()
 test = do
+  templateFilename <- inject "template.html"
+  template <- readTemplate templateFilename
   dir <- inject "retter"
   dirContents <- listDirectory dir
-  mapComputationM_ handleRecipeDir dirContents
+  mapComputationM_ (handleRecipeDir template) dirContents
 
 main :: IO ()
 main = mapM_ print $ evalComputationM test

byg/src/Types.hs

@@ -6,6 +6,13 @@ import Data.ByteString (ByteString)
 data ImageConversionSettings = ResizeToWidth Int
   deriving (Show)
 
+data TemplatePart = Literal String
+                  | KeyValue String
+  deriving (Show)
+
+data Template = Template [TemplatePart]
+  deriving (Show)
+
 class (SourceState a, Show f) => IsFunction f a b | f -> a b where
   runF :: f -> a -> b