{-|
Defines the template types used internally in ProjectForge
-}
module ProjectForge.ProjectTemplate where

import           Data.Set      (Set)
import           Text.Mustache (Template)

{-|
A @FileTemplate@ is a pair of @'Text.Mustache.Template'@s:
one for a file's name and
one for a file's contents.

See @'ProjectForge.Compile.compileFileTemplate`@ for a utility
to create a @FileTemplate@ from text inputs.
-}
data FileTemplate = MkFileTemplate {
    originalFilename     :: !FilePath -- ^ name of the template file
  , fileNameTemplate     :: !Template -- ^ template for a file's name
  , fileContentsTemplate :: !Template -- ^ template for contents of a file
  } deriving (Eq, Show, Ord)

{-|
A collection of @'FileTemplate'@ corresponding to all the files
to be produced by an initialization template.
-}
newtype ProjectTemplate = MkProjectTemplate (Set FileTemplate)
  deriving (Eq, Show)

instance Semigroup ProjectTemplate where
  (<>) (MkProjectTemplate x) (MkProjectTemplate y) = MkProjectTemplate (x <> y)