Add fileExtension config for md files

Introduce a seed fed into `randoms (mkStdGen (seed config)`
Some light formatting

.gitignore

@@ -6,8 +6,9 @@
 dist
 generateSealPosts
 
-# Direnv lorri stuff
+# Nix related
 .direnv
+result
 
 # Too many posts, hiding for now
 posts

.vscode/settings.json

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

README.md

@@ -8,17 +8,13 @@ It's an in-joke.
 
 ## What's all this code?
 
-- generate/
-  - generateSealPosts.hs
-    - A Haskell script that checks the website/posts folder and creates a blog post for every day from 1998 until the current date. There you will find the adjective lists if you think of more words to describe seals.
-- dist/
-  - Place for the Haskell build artifacts to go.
+- [config.dhall](./config.dhall)
+  - Typed non-deterministic config file for modifying the generator.
+- [flake.nix](./flake.nix)
+  - Entry point for all the nix ways of running and building the code.
+- [generateSealPosts.hs](./generateSealPosts.hs)
+  - A Haskell script that creates a blog post for every day from the configured date until the current day.
 
 ## These seals need more adjectives
 
-In [config.dhall](https://git.ewanick.com/bill/sealPostGenerator/src/branch/main/config.dhall) you'll find two lists of adjectives. For the repo and add your own! Editing dhall config files does not require recompilation of the Haskell executable!
-
-## Recent work
-
-- Should running the generate function replace existing posts, or not? Probably not.
-  - But need to split out the archive build vs the incremental post creation.
+In [config.dhall](./config.dhall) you'll find two lists of adjectives. For the repo and add your own! Editing dhall config files does not require recompilation of the Haskell executable!

config.dhall

@@ -1,6 +1,8 @@
-{ sealImagesPath = "./images"
-, postsOutputPath = "./posts"
-, startDate = 2022-01-01
+{ sealImagesPath = "images"
+, postsOutputPath = "posts"
+, startDate = 1959-01-15
+, seed = +2016
+, fileExtension = "md"
 , adjectives1 =
   [ "absorbing"
   , "adorable"

flake.lock

@@ -2,16 +2,16 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1681482634,
-        "narHash": "sha256-cT/nr3L8khEYZSGp8qqwxFH+/q4/547MfyOdSj6MhBk=",
+        "lastModified": 1690927903,
+        "narHash": "sha256-D5gCaCROnjEKDOel//8TO/pOP87pAEtT0uT8X+0Bj/U=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "fda0d99c2cbbb5c89d8855d258cb0821bd9113ad",
+        "rev": "bd836ac5e5a7358dea73cb74a013ca32864ccb86",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-22.11",
+        "ref": "nixos-23.05",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -42,11 +42,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1681202837,
-        "narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
+        "lastModified": 1689068808,
+        "narHash": "sha256-6ixXo3wt24N/melDWjq70UuHQLxGV8jZvooRanIHXw0=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "cfacdce06f30d2b68473a46042957675eebb3401",
+        "rev": "919d646de7be200f3bf08cb76ae1f09402b6f9b4",
         "type": "github"
       },
       "original": {

flake.nix

@@ -2,7 +2,7 @@
   description = "A Nix flake for a blog-post generating script, written in Haskell, with a seal bent.";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";
     utils.url = "github:numtide/flake-utils";
   };
 
@@ -18,18 +18,25 @@
         ]);
       in
       {
+        packages.default = pkgs.runCommand "generateSealPosts" { } ''
+          echo Generating seal posts
+          mkdir -p $out/bin
+          ${ghc'}/bin/ghc                 \
+            -O2                           \
+            -static                       \
+            -o $out/bin/generateSealPosts \
+            ${./generateSealPosts.hs}
+        '';
+
         devShells.default = pkgs.mkShell {
           name = "seal-generator-shell";
-
           buildInputs = with pkgs.haskellPackages;
             [
               ghc'
               hlint
               haskell-language-server
 
-              (pkgs.writeShellScriptBin "build-seal-generator" ''
-                ${ghc'}/bin/ghc -outputdir dist -O2 -static generateSealPosts.hs
-              '')
+              dhall-lsp-server
             ];
         };
       });

generateSealPosts.hs

@@ -13,8 +13,7 @@ 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, fromGregorian,
-                                     toGregorian)
+import           Data.Time.Calendar (Day, addDays, diffDays, toGregorian)
 import           Data.Time.Clock    (UTCTime (utctDay), getCurrentTime)
 import           Dhall              (FromDhall, Generic, auto, input)
 import           NeatInterpolation  (text)
@@ -22,7 +21,7 @@ import           NeatInterpolation  (text)
 import           System.Directory   (createDirectoryIfMissing, doesFileExist,
                                      listDirectory)
 import           System.IO.Unsafe   (unsafePerformIO)
-import           System.Random      (Random, randomRIO)
+import           System.Random      (Random (randoms), mkStdGen)
 
 
 {-
@@ -31,10 +30,12 @@ import           System.Random      (Random, randomRIO)
 data Config = Config
   { adjectives1     :: [Text]
   , adjectives2     :: [Text]
+  , fileExtension   :: String
   , looks           :: [Text]
   , sealImagesPath  :: FilePath
   , postsOutputPath :: FilePath
   , startDate       :: Day
+  , seed            :: Int
   } deriving (Generic, Show)
 instance FromDhall Config
 
@@ -68,8 +69,13 @@ generateAllBlogPosts config = forM_ allBlogPosts' writeToFile'
 allBlogPosts :: Config -> [(FilePath, Text)]
 allBlogPosts config = map createSealText zippedDates
   where
-    createSealText = uncurry $ sealText config
-    zippedDates = zip [1..] (allDatesSince (startDate config))
+    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
 
     allDatesSince :: Day -> [Day]
     allDatesSince startDate = map (`addDays` startDate) [0..daysSinceStart]
@@ -87,49 +93,22 @@ 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 -> Day -> (FilePath, Text)
-sealText config n date = ( fileName', bp )
+sealText :: Config -> Integer -> Int -> Day -> (FilePath, Text)
+sealText config n rand date = ( fileName', bp )
   where
     fileName' =
          show date <> "-"
       <> "seal-post-"
       <> show n
-      <> ".markdown"
+      <> "." <> fileExtension'
     date'     = T.pack . show $ date
     title     = T.pack $ "Seal Post Number " <> show n
     title'    = T.replace " " "-" title
     sealImagesPath' = sealImagesPath config
+    fileExtension' = fileExtension config
 
     bp = blogPost' (toGregorian date)
 
@@ -150,43 +129,60 @@ sealText config n date = ( fileName', bp )
         "Foolishly look at"
         "beautiful"
         "supermodel, singing"
-        "singerSeal.jpg"
+        "_singerSeal.jpg"
         date
         sealImagesPath'
 
     blogPost' (_, _, _) =
       blogPost
         title
-        (randomPull $ looks config)
-        (randomPull $ adjectives1 config)
-        (randomPull $ adjectives2 config)
-        (randomPull $ unsafeListDirContents sealImagesPath')
+        (randomPull rand (looks config))
+        (randomPull rand (adjectives1 config))
+        (randomPull rand (adjectives2 config))
+        (randomPull rand (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 . sort . unsafePerformIO . listDirectory
+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
 
 prettyPrint :: Show a => [a] -> IO ()
 prettyPrint = putStr . unlines . map show