.vscode/settings.json

@@ -4,7 +4,6 @@
     "Dhall",
     "NOINLINE",
     "runghc",
-    "txts",
     "uncurry",
     "unlines",
     "utct"

config.dhall

@@ -1,7 +1,6 @@
-{ sealImagesPath = "images"
-, postsOutputPath = "posts"
+{ sealImagesPath = "./images"
+, postsOutputPath = "./posts"
 , startDate = 2022-01-01
-, seed = +137
 , adjectives1 =
   [ "absorbing"
   , "adorable"

generateSealPosts.hs

@@ -13,7 +13,8 @@ import           Data.List          (sort)
 import           Data.Text          (Text)
 import qualified Data.Text          as T
 import qualified Data.Text.IO       as TIO
-import           Data.Time.Calendar (Day, addDays, diffDays, toGregorian)
+import           Data.Time.Calendar (Day, addDays, diffDays, fromGregorian,
+                                     toGregorian)
 import           Data.Time.Clock    (UTCTime (utctDay), getCurrentTime)
 import           Dhall              (FromDhall, Generic, auto, input)
 import           NeatInterpolation  (text)
@@ -21,7 +22,7 @@ import           NeatInterpolation  (text)
 import           System.Directory   (createDirectoryIfMissing, doesFileExist,
                                      listDirectory)
 import           System.IO.Unsafe   (unsafePerformIO)
-import           System.Random      (Random (randoms), mkStdGen)
+import           System.Random      (Random, randomRIO)
 
 
 {-
@@ -34,7 +35,6 @@ data Config = Config
   , sealImagesPath  :: FilePath
   , postsOutputPath :: FilePath
   , startDate       :: Day
-  , seed            :: Int
   } deriving (Generic, Show)
 instance FromDhall Config
 
@@ -68,13 +68,8 @@ generateAllBlogPosts config = forM_ allBlogPosts' writeToFile'
 allBlogPosts :: Config -> [(FilePath, Text)]
 allBlogPosts config = map createSealText zippedDates
   where
-    createSealText = uncurry3 $ sealText config
-    zippedDates = zip3 [1..] randomNumbers (allDatesSince (startDate config))
-    randomNumbers = randoms (mkStdGen (seed config))
-
-    -- | Converts a curried function to a function on a triple.
-    uncurry3 :: (a -> b -> c -> d) -> ((a, b, c) -> d)
-    uncurry3 f (a,b,c) = f a b c
+    createSealText = uncurry $ sealText config
+    zippedDates = zip [1..] (allDatesSince (startDate config))
 
     allDatesSince :: Day -> [Day]
     allDatesSince startDate = map (`addDays` startDate) [0..daysSinceStart]
@@ -92,11 +87,39 @@ writeToFile config (fp, txt) = do
     fp'   = postsOutputPath config <> "/" <> fp
 
 
+{-
+  Blog post format
+-}
+blogPost
+  :: Text
+  -> Text
+  -> Text
+  -> Text
+  -> Text
+  -> Day
+  -> FilePath
+  -> Text
+blogPost title see adj1 adj2 seal date imagesPath =
+  let imagesPath' = T.pack imagesPath
+  in
+  [text|
+    ---
+    title: $title
+    ---
+
+    $see this $adj1, $adj2 seal!
+    <img
+      src="/$imagesPath'/$seal"
+      alt="A picture of a $adj1, $adj2 seal! <3"
+      width="400"
+    />
+  |]
+
 {-
   Returns a filePath, and a corresponding random blog post
 -}
-sealText :: Config -> Integer -> Int -> Day -> (FilePath, Text)
-sealText config n rand date = ( fileName', bp )
+sealText :: Config -> Integer -> Day -> (FilePath, Text)
+sealText config n date = ( fileName', bp )
   where
     fileName' =
          show date <> "-"
@@ -134,53 +157,36 @@ sealText config n rand date = ( fileName', bp )
     blogPost' (_, _, _) =
       blogPost
         title
-        (randomPull rand (looks config))
-        (randomPull rand (adjectives1 config))
-        (randomPull rand (adjectives2 config))
-        (randomPull rand (unsafeListDirContents sealImagesPath'))
+        (randomPull $ looks config)
+        (randomPull $ adjectives1 config)
+        (randomPull $ adjectives2 config)
+        (randomPull $ unsafeListDirContents sealImagesPath')
         date
         sealImagesPath'
-      where
-        randomPull r txts = txts !! (rand `mod` l)
-          where l = length txts - 1
-
-    {-
-      Blog post format
-    -}
-    blogPost
-      :: Text
-      -> Text
-      -> Text
-      -> Text
-      -> Text
-      -> Day
-      -> FilePath
-      -> Text
-    blogPost title see adj1 adj2 seal date imagesPath =
-      let imagesPath' = T.pack imagesPath
-      in
-      [text|
-        ---
-        title: $title
-        ---
-
-        $see this $adj1, $adj2 seal!
-        <img
-          src="/$imagesPath'/$seal"
-          alt="A picture of a $adj1, $adj2 seal! <3"
-          width="400"
-        />
-      |]
 
 
 {-
   Utils
 -}
+  {-
+    Given a list, returns a random element
+  -}
+randomPull :: [a] -> a
+randomPull lst = lst !! r'
+    where
+    r' = randomNum 0 l
+    l  = length lst - 1
+
+    {-
+      Gives a random number between from and to
+      Uses unsafeIO to get the number out of IO
+      It's safe because we're only shuffling
+    -}
+    randomNum :: Random a => a -> a -> a
+    randomNum from to = unsafePerformIO $ randomRIO (from, to)
+
 unsafeListDirContents :: FilePath -> [Text]
-unsafeListDirContents = map T.pack . drop 2 . sort . unsafePerformIO . listDirectory
---                                   ^^^^^^
--- drop 2 used to remove the birthday and singer photos
--- TODO: find a better way to hardcode this
+unsafeListDirContents = map T.pack . sort . unsafePerformIO . listDirectory
 
 prettyPrint :: Show a => [a] -> IO ()
 prettyPrint = putStr . unlines . map show