docs(workflow): rename main.yml

remove busybox (pure bloat) and unnecessary documentation

.envrc

@@ -0,0 +1 @@
+use flake

.github/workflows/main.yml

@@ -0,0 +1,18 @@
+name: "Cache binaries"
+on:
+  pull_request:
+  push:
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v25
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - uses: cachix/cachix-action@v14
+        with:
+          name: suntheme
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+      - run: nix build --accept-flake-config
+      - run: nix develop --accept-flake-config

.gitignore

@@ -21,3 +21,5 @@ cabal.project.local
 cabal.project.local~
 .HTF/
 .ghc.environment.*
+result
+.direnv/

README.md

@@ -0,0 +1,57 @@
+# Suntheme
+
+Runs a script on sunrise and sunset, written in pure Haskell
+
+---
+
+You may be wondering how a program written in Haskell, the purely functional
+programming language, could possibly act on the real world by running a so-called "script."
+
+It's simple. We take in the entire World as an input to a pure function, the IO Monad.
+It then maps the original World to a new (generated) World, with our desired IO actions carefully applied with mathematical precision.
+
+> From the second perspective, an IO action transforms the whole world. IO actions are actually pure, because they receive a unique world as an argument and then return the changed world.
+
+See [this](https://lean-lang.org/functional_programming_in_lean/monads/io.html) for more information.
+
+## Hacking on suntheme
+
+It's trivial to get started with suntheme development thanks to [Nix](https://nixos.org/), the purely functional package manager.
+Naturally, we leverage it as our primary package manager, both for Hackage and development tools like language servers and the like.
+
+First, install Nix through your preferred avenue or local system administrator. If unsure, we recommend [the Determinate Nix Installer](https://github.com/DeterminateSystems/nix-installer).
+Make sure flakes and nix-command are enabled (the Determinate Installer will enable them by default).
+
+Once you have `nix`, simply type:
+
+```bash
+nix develop
+```
+
+Say yes to any prompts asking you to allow substituters or trust public keys.
+Nix will fetch all of the required packages, such as GHC and Hackage dependencies.
+Additionally, you will have access to `hlint` and the `haskell-language-server`.
+
+To create a build, type
+
+```bash
+nix build
+```
+
+A binary will be produced in `result/bin/suntheme`.
+
+To make `suntheme` available in the shell without outputting to `result`, use
+
+```bash
+nix shell
+```
+
+This will build a binary just like `nix build` but add it temporarily to the PATH, so you can just type `suntheme`.
+
+To build and run `suntheme` immediately without adding it to the PATH, use
+
+```bash
+nix run
+```
+
+This will build a binary just like `nix shell` but immediately execute it.

app/Cache.hs

@@ -0,0 +1,51 @@
+module Cache where
+
+import Const (cacheFile, logFile, prog)
+import Sugar (killall, failure)
+
+import Data.List.Extra ((!?))
+import System.FilePath ((</>), takeDirectory)
+import System.Directory (
+        XdgDirectory(XdgCache, XdgConfig),
+        createDirectoryIfMissing, doesFileExist, getXdgDirectory
+    )
+import Control.Exception (catch)
+
+pathToCache :: String -> IO String
+pathToCache str = (</> str) <$> getXdgDirectory XdgCache prog
+
+pathToConfig :: String -> IO String
+pathToConfig str = (</> str) <$> getXdgDirectory XdgConfig prog
+
+readCache :: IO (Maybe (Double, Double, String))
+readCache = do
+    cache <- pathToCache cacheFile
+    contents <- readFile cache
+    let entries = lines contents
+    case (entries !? 0, entries !? 1, entries !? 2) of
+        (Just lat, Just lon, Just tz) -> return (Just (read lat, read lon, tz))
+        _ -> return Nothing
+
+dumpCache :: Double -> Double -> String -> IO (Double, Double)
+dumpCache lat lon tz = do
+    cache <- pathToCache cacheFile
+    catch (writer cache) failure
+    return (lat, lon)
+    where writer dir = writeFile dir (show lat ++ "\n" ++ show lon ++ "\n" ++ tz)
+
+start :: IO ()
+start = do
+    logs <- pathToCache logFile
+    existsLog <- doesFileExist logs
+    if existsLog then do
+        contents <- readFile logs
+        (sequence_ . killall . lines) contents
+    else createDirectoryIfMissing True (takeDirectory logs)
+
+finish :: String -> IO ()
+finish queue = do
+    cache <- pathToCache logFile
+    catch (writeFile cache num) failure
+    where
+        getId = head . words . last . lines
+        num = getId queue

app/Const.hs

@@ -0,0 +1,19 @@
+module Const where
+
+query :: String
+query = "http://ip-api.com/line/?fields=status,lat,lon,timezone"
+
+prog :: String
+prog = "suntheme"
+
+cacheFile :: String
+cacheFile = "data.txt"
+
+logFile :: String
+logFile = "log.txt"
+
+lightModeScript :: String
+lightModeScript = "light.sh"
+
+darkModeScript :: String
+darkModeScript = "dark.sh"

app/Getters.hs

@@ -0,0 +1,7 @@
+module Getters where
+
+import Control.Exception (SomeException, try)
+import Network.HTTP.Request (Response, get)
+
+fetch :: String -> IO (Either SomeException Response)
+fetch = try . get

app/Main.hs

@@ -1,128 +1,35 @@
--- requires 'at' for running a command at a certain time
--- requires 'date' for converting unix time to human readable time
 -- run on boot and at noon and midnight
--- don't add commands to at while this script is running (monadic purity must be preserved)
+-- don't add commands to `at` while this script is running (monadic purity must be preserved)
 
 module Main where
 
-import Data.Time (ZonedTime, getCurrentTime)
-import Data.Time.Solar (Location(Location), sunrise, sunset)
-import Data.Time.RFC3339 (formatTimeRFC3339)
-import Data.Time.LocalTime (getTimeZone, utcToZonedTime, zonedTimeToUTC)
-import Data.List.Extra ((!?))
+import Pure (readLines)
+import Cache (dumpCache, start)
+import Const (query)
+import Sugar (continue, destruct)
+import Types (ResponseCode(..), ResponseMsg(..), genericErr, toResponseMsg)
+import Getters (fetch)
+import Workers (backupRunner, prepareScripts)
+
 import Data.ByteString.Char8 (unpack)
-import System.Exit (ExitCode(ExitFailure), exitWith)
-import System.Process (readProcess)
-import System.FilePath ((</>), takeDirectory)
-import System.Directory (XdgDirectory(XdgCache, XdgConfig), createDirectoryIfMissing, doesFileExist, getXdgDirectory)
-import Control.Exception (SomeException, catch, try)
-import Network.HTTP.Request (Response(responseBody, responseStatus), get)
+import Network.HTTP.Request (Response(responseBody, responseStatus))
 
 -- error handling
--- refactor into modules
--- clean up jank (reduce lines in functions, more atomic/functional, etc)
+-- clean up jank (
+--  create types,
+--  more pure functions,
+--  reduce lines in functions,
+--  more atomic/functional,
+--  etc
+-- )
 -- eliminate as many do blocks as possible
 -- introduce liquid types and checking
 -- whitepaper!
 
-class Status s where
-    ok :: s -> Bool
-    ok = const False
-
-    disp :: s -> String
-    disp = const "encountered bad response (expected OK)"
-
-newtype ResponseCode = ResponseCode Int
-instance Status ResponseCode where
-    ok (ResponseCode code) = code == 200
-    disp (ResponseCode code) =
-        "encountered bad response code: "
-        ++ show code
-        ++ " (expected 200 'OK')"
-
-newtype ResponseMsg = ResponseMsg String
-instance Status ResponseMsg where
-    ok (ResponseMsg msg) = msg == "success"
-    disp (ResponseMsg msg) =
-        "encountered bad response message: "
-        ++ msg
-        ++ " (expected 'success')"
-
-toResponseMsg :: SomeException -> ResponseMsg
-toResponseMsg = ResponseMsg . show
-
-query :: String
-query = "http://ip-api.com/line/?fields=status,lat,lon,timezone"
-
-genericErr :: ResponseMsg
-genericErr = ResponseMsg "encountered unknown error"
-
-prog :: String
-prog = "suntheme"
-
-lightModeScript :: String
-lightModeScript = "light.sh"
-
-darkModeScript :: String
-darkModeScript = "dark.sh"
-
-now :: IO ZonedTime
-now = do
-    utcTime <- getCurrentTime
-    timeZone <- getTimeZone utcTime
-    return (utcToZonedTime timeZone utcTime)
-
-sunriseNow :: Double -> Double -> IO ZonedTime
-sunriseNow lat lon = do
-    time <- now
-    return (sunrise time here)
-    where here = Location lat lon
-
-sunsetNow :: Double -> Double -> IO ZonedTime
-sunsetNow lat lon = do
-    time <- now
-    return (sunset time here)
-    where here = Location lat lon
-
-pathToCache :: String -> IO String
-pathToCache str = do
-    dir <- getXdgDirectory XdgCache prog
-    return (dir </> str)
-
-pathToConfig :: String -> IO String
-pathToConfig str = do
-    dir <- getXdgDirectory XdgConfig prog
-    return (dir </> str)
-
-fetch :: String -> IO (Either SomeException Response)
-fetch = try . get
-
-cont :: (Status s) => s -> IO () -> IO ()
-cont e err = (putStrLn . disp) e >> err
-
-destruct :: (Status s) => s -> IO () -> IO () -> IO ()
-destruct status success failure
-    | ok status = success
-    | otherwise = cont status failure
-
-ping :: (Response -> IO ()) -> IO () -> IO ()
-ping run err = do
-    res <- fetch query
-    case res of
-        Left e -> cont (toResponseMsg e) err
-        Right r ->
-            let status = (ResponseCode . responseStatus) r
-                runner = run r
-            in destruct status runner err
-
-readLines :: [String] -> Maybe (String, Double, Double, String)
-readLines [msg, latStr, lonStr, tz] = Just (msg, read latStr, read lonStr, tz)
-readLines _ = Nothing
-
 process :: Response -> (Double -> Double -> String -> IO ()) -> IO () -> IO ()
 process r run err =
     case info of
-        Nothing -> cont genericErr err
+        Nothing -> continue genericErr err
         Just (msg, lat, lon, tz) ->
             let status = ResponseMsg msg
                 runner = run lat lon tz
@@ -132,114 +39,22 @@ process r run err =
         parts = (lines . unpack) body
         info = (readLines . take 4) parts
 
-dumpCache :: Double -> Double -> String -> IO ()
-dumpCache lat lon tz = do
-    cache <- pathToCache "data.txt"
-    catch (writer cache) failure
-    prepareScripts lat lon
-    where
-        writer dir = writeFile dir (show lat ++ "\n" ++ show lon ++ "\n" ++ tz)
-        failure = print :: SomeException -> IO ()
-
-readCache :: IO (Maybe (Double, Double, String))
-readCache = do
-    cache <- pathToCache "data.txt"
-    contents <- readFile cache
-    let entries = lines contents
-    case (entries !? 0, entries !? 1, entries !? 2) of
-        (Just lat, Just lon, Just tz) -> return (Just (read lat, read lon, tz))
-        _ -> return Nothing
-
 processRunner :: Response -> IO ()
-processRunner r = process r dumpCache backupRunner
+processRunner r = process r run backupRunner
+    where run lat lon tz = dumpCache lat lon tz >>= prepareScripts
 
-crash :: IO ()
-crash = exitWith (ExitFailure 1)
-
-backupRunner :: IO ()
-backupRunner = do
-    contents <- readCache
-    case contents of
-        Nothing -> do
-            putStrLn "Failed to read cache after IP location failed"
-            crash
-        Just (lat, lon, _) -> prepareScripts lat lon
-
-exec :: String -> (SomeException -> IO String) -> IO String
-exec cmd err = do catch (readProcess "bash" ["-c", cmd] "") err
-
-kill :: String -> String
-kill = (++) "atrm "
-
-killall :: [String] -> IO ()
-killall = foldr ((>>) . dispatch . kill) (return ())
-    where
-        dispatch cmd = exec cmd failure
-        failure :: SomeException -> IO String
-        failure e = print e >> return []
-
-start :: IO () -> IO ()
-start act = do
-    logFile <- pathToCache "log.txt"
-    existsLog <- doesFileExist logFile
-    if existsLog then do
-        contents <- readFile logFile
-        let entries = lines contents
-        killall entries
-    else createDirectoryIfMissing True (takeDirectory logFile)
-    act
-
-finish :: String -> IO ()
-finish queue = do
-    cache <- pathToCache "log.txt"
-    catch (writeFile cache num) failure
-    where
-        num = getId queue
-        getId = head . words . last . lines
-        failure = print :: SomeException -> IO ()
-
-after :: (Eq a) => a -> [a] -> [a]
-after c = drop 1 . dropWhile (/= c)
-
-formatTime :: ZonedTime -> String
-formatTime = take 5 . after 'T' . formatTimeRFC3339
-
-buildCmd :: String -> ZonedTime -> String
-buildCmd script time = "echo \"" ++ script ++ "\" | at " ++ formatTime time
-
-activateOnSunrise :: ZonedTime -> ZonedTime -> IO Bool
-activateOnSunrise sunriseTime sunsetTime = do
-    timeNow <- now
-    let utcTimeNow = zonedTimeToUTC timeNow
-        utcSunrise = zonedTimeToUTC sunriseTime
-        utcSunset = zonedTimeToUTC sunsetTime
-    if utcTimeNow < utcSunrise || utcTimeNow > utcSunset then return True
-    else return False
-
-prepareScripts :: Double -> Double -> IO ()
-prepareScripts lat lon = do
-    sunriseTime <- sunriseNow lat lon
-    sunsetTime <- sunsetNow lat lon
-    lightMode <- activateOnSunrise sunriseTime sunsetTime
-    _ <- if lightMode then do
-        putStr "Light mode activation script scheduled for "
-        print sunriseTime
-        script <- pathToConfig lightModeScript
-        exec (buildCmd script sunriseTime) terminate
-    else do
-        putStrLn "Dark mode activation script scheduled for "
-        print sunsetTime
-        script <- pathToConfig darkModeScript
-        exec (buildCmd script sunsetTime) terminate
-    queue <- exec "atq" noQueue
-    finish queue
-    where
-        terminate _ = print "Scheduling process failed" >> return ""
-        noQueueMsg = "Scheduled process could not be retrieved (try rerunning if 'atq' fails)"
-        noQueue _ = print noQueueMsg >> return ""
+ping :: (Response -> IO ()) -> IO () -> IO ()
+ping run err = do
+    res <- fetch query
+    case res of
+        Left e -> continue (toResponseMsg e) err
+        Right r ->
+            let status = (ResponseCode . responseStatus) r
+                runner = run r
+            in destruct status runner err
 
 routine :: IO ()
 routine = ping processRunner backupRunner
 
 main :: IO ()
-main = start routine
+main = start >> routine

app/Pure.hs

@@ -0,0 +1,28 @@
+module Pure where
+
+import Data.Time (ZonedTime)
+import Data.Time.RFC3339 (formatTimeRFC3339)
+import Data.Time.LocalTime (zonedTimeToUTC)
+
+readLines :: [String] -> Maybe (String, Double, Double, String)
+readLines [msg, latStr, lonStr, tz] = Just (msg, read latStr, read lonStr, tz)
+readLines _ = Nothing
+
+kill :: String -> String
+kill = (++) "atrm "
+
+after :: (Eq a) => a -> [a] -> [a]
+after c = drop 1 . dropWhile (/= c)
+
+formatTime :: ZonedTime -> String
+formatTime = take 5 . after 'T' . formatTimeRFC3339
+
+buildCmd :: String -> ZonedTime -> String
+buildCmd script time = "echo \"" ++ script ++ "\" | at " ++ formatTime time
+
+sunriseNext :: ZonedTime -> ZonedTime -> ZonedTime -> Bool
+sunriseNext sunriseTime sunsetTime time = 
+    let utcTimeNow = zonedTimeToUTC time
+        utcSunrise = zonedTimeToUTC sunriseTime
+        utcSunset = zonedTimeToUTC sunsetTime 
+    in utcTimeNow < utcSunrise || utcTimeNow > utcSunset

app/Sugar.hs

@@ -0,0 +1,31 @@
+module Sugar where
+
+import Pure (kill)
+import Types (Status(..))
+
+import System.Exit (ExitCode(ExitFailure), exitWith)
+import System.Process (readProcess)
+import Control.Exception (SomeException, catch)
+
+throw :: (Monoid m) => SomeException -> IO m
+throw e = print e >> return mempty
+
+continue :: (Status s) => s -> IO () -> IO ()
+continue e err = (putStrLn . disp) e >> err
+
+failure :: SomeException -> IO ()
+failure = print
+
+destruct :: (Status s) => s -> IO () -> IO () -> IO ()
+destruct status success unsuccessful
+    | ok status = success
+    | otherwise = continue status unsuccessful
+
+crash :: IO ()
+crash = (exitWith . ExitFailure) 1
+
+exec :: String -> (SomeException -> IO String) -> IO String
+exec cmd = catch (readProcess "bash" ["-c", cmd] "")
+
+killall :: [String] -> [IO String]
+killall = map (dispatch . kill) where dispatch cmd = exec cmd throw

app/Time.hs

@@ -0,0 +1,44 @@
+module Time where
+
+import Pure (buildCmd, sunriseNext)
+import Cache (pathToConfig)
+import Const (darkModeScript, lightModeScript)
+import Sugar (exec)
+
+import Data.Time (ZonedTime, getCurrentTime)
+import Data.Time.Solar (Location(Location), sunrise, sunset)
+import Data.Time.LocalTime (getTimeZone, utcToZonedTime)
+
+now :: IO ZonedTime
+now = do
+    utcTime <- getCurrentTime
+    timeZone <- getTimeZone utcTime
+    return (utcToZonedTime timeZone utcTime)
+
+sunriseNow :: Double -> Double -> IO ZonedTime
+sunriseNow lat lon = do
+    time <- now
+    return (sunrise time here)
+    where here = Location lat lon
+
+sunsetNow :: Double -> Double -> IO ZonedTime
+sunsetNow lat lon = do
+    time <- now
+    return (sunset time here)
+    where here = Location lat lon
+
+activateOnSunrise :: ZonedTime -> ZonedTime -> IO Bool
+activateOnSunrise sunriseTime sunsetTime = sunriseNext sunriseTime sunsetTime <$> now
+
+activate :: String -> ZonedTime -> String -> IO String
+activate msg time script = do
+    putStr msg
+    print time
+    scriptPath <- pathToConfig script
+    exec (buildCmd scriptPath time) terminate
+    where terminate _ = print "Scheduling process failed" >> return "" 
+
+chooseActivation :: Bool -> ZonedTime -> ZonedTime -> IO String
+chooseActivation lightMode sunriseTime sunsetTime
+    | lightMode = activate "Light mode activation script scheduled for " sunriseTime lightModeScript
+    | otherwise = activate "Dark mode activation script scheduled for " sunsetTime darkModeScript

app/Types.hs

@@ -0,0 +1,32 @@
+module Types where
+
+import Control.Exception (SomeException)
+
+class Status s where
+    ok :: s -> Bool
+    ok = const False
+
+    disp :: s -> String
+    disp = const "encountered bad response (expected OK)"
+
+newtype ResponseCode = ResponseCode Int
+instance Status ResponseCode where
+    ok (ResponseCode code) = code == 200
+    disp (ResponseCode code) =
+        "encountered bad response code: "
+        ++ show code
+        ++ " (expected 200 'OK')"
+
+newtype ResponseMsg = ResponseMsg String
+instance Status ResponseMsg where
+    ok (ResponseMsg msg) = msg == "success"
+    disp (ResponseMsg msg) =
+        "encountered bad response message: "
+        ++ msg
+        ++ " (expected 'success')"
+
+toResponseMsg :: SomeException -> ResponseMsg
+toResponseMsg = ResponseMsg . show
+
+genericErr :: ResponseMsg
+genericErr = ResponseMsg "encountered unknown error"

app/Workers.hs

@@ -0,0 +1,26 @@
+module Workers where
+
+import Time (chooseActivation, activateOnSunrise, sunriseNow, sunsetNow)
+import Cache (finish, readCache)
+import Sugar (crash, exec)
+
+prepareScripts :: (Double, Double) -> IO ()
+prepareScripts (lat, lon) = do
+    sunriseTime <- sunriseNow lat lon
+    sunsetTime <- sunsetNow lat lon
+    lightMode <- activateOnSunrise sunriseTime sunsetTime
+    _ <- chooseActivation lightMode sunriseTime sunsetTime
+    queue <- exec "atq" noQueue
+    finish queue
+    where
+        noQueueMsg = "Scheduled process could not be retrieved (try rerunning if 'atq' fails)"
+        noQueue _ = print noQueueMsg >> return ""
+
+backupRunner :: IO ()
+backupRunner = do
+    contents <- readCache
+    case contents of
+        Nothing -> do
+            putStrLn "Failed to read cache after IP location failed"
+            crash
+        Just (lat, lon, _) -> prepareScripts (lat, lon)

flake.lock

@@ -0,0 +1,707 @@
+{
+  "nodes": {
+    "HTTP": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1451647621,
+        "narHash": "sha256-oHIyw3x0iKBexEo49YeUDV1k74ZtyYKGR2gNJXXRxts=",
+        "owner": "phadej",
+        "repo": "HTTP",
+        "rev": "9bc0996d412fef1787449d841277ef663ad9a915",
+        "type": "github"
+      },
+      "original": {
+        "owner": "phadej",
+        "repo": "HTTP",
+        "type": "github"
+      }
+    },
+    "cabal-32": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1603716527,
+        "narHash": "sha256-X0TFfdD4KZpwl0Zr6x+PLxUt/VyKQfX7ylXHdmZIL+w=",
+        "owner": "haskell",
+        "repo": "cabal",
+        "rev": "48bf10787e27364730dd37a42b603cee8d6af7ee",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "3.2",
+        "repo": "cabal",
+        "type": "github"
+      }
+    },
+    "cabal-34": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1645834128,
+        "narHash": "sha256-wG3d+dOt14z8+ydz4SL7pwGfe7SiimxcD/LOuPCV6xM=",
+        "owner": "haskell",
+        "repo": "cabal",
+        "rev": "5ff598c67f53f7c4f48e31d722ba37172230c462",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "3.4",
+        "repo": "cabal",
+        "type": "github"
+      }
+    },
+    "cabal-36": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1669081697,
+        "narHash": "sha256-I5or+V7LZvMxfbYgZATU4awzkicBwwok4mVoje+sGmU=",
+        "owner": "haskell",
+        "repo": "cabal",
+        "rev": "8fd619e33d34924a94e691c5fea2c42f0fc7f144",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "3.6",
+        "repo": "cabal",
+        "type": "github"
+      }
+    },
+    "cardano-shell": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1608537748,
+        "narHash": "sha256-PulY1GfiMgKVnBci3ex4ptk2UNYMXqGjJOxcPy2KYT4=",
+        "owner": "input-output-hk",
+        "repo": "cardano-shell",
+        "rev": "9392c75087cb9a3d453998f4230930dea3a95725",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "cardano-shell",
+        "type": "github"
+      }
+    },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1672831974,
+        "narHash": "sha256-z9k3MfslLjWQfnjBtEtJZdq3H7kyi2kQtUThfTgdRk0=",
+        "owner": "input-output-hk",
+        "repo": "flake-compat",
+        "rev": "45f2638735f8cdc40fe302742b79f248d23eb368",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "ref": "hkm/gitlab-fix",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1710146030,
+        "narHash": "sha256-SZ5L6eA7HJ/nmkzGG7/ISclqe6oZdOZTNoesiInkXPQ=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "b1d9ab70662946ef0850d488da1c9019f3a9752a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "ghc-8.6.5-iohk": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1600920045,
+        "narHash": "sha256-DO6kxJz248djebZLpSzTGD6s8WRpNI9BTwUeOf5RwY8=",
+        "owner": "input-output-hk",
+        "repo": "ghc",
+        "rev": "95713a6ecce4551240da7c96b6176f980af75cae",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "ref": "release/8.6.5-iohk",
+        "repo": "ghc",
+        "type": "github"
+      }
+    },
+    "hackage": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1723768183,
+        "narHash": "sha256-YG61ZL5YZvSWPvdusFsS8EYDJ/MW+EgX8fjNMWU18GQ=",
+        "owner": "input-output-hk",
+        "repo": "hackage.nix",
+        "rev": "37977e3b6201db1e0f3c62d9c55ec20dfcee10a2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "hackage.nix",
+        "type": "github"
+      }
+    },
+    "haskellNix": {
+      "inputs": {
+        "HTTP": "HTTP",
+        "cabal-32": "cabal-32",
+        "cabal-34": "cabal-34",
+        "cabal-36": "cabal-36",
+        "cardano-shell": "cardano-shell",
+        "flake-compat": "flake-compat",
+        "ghc-8.6.5-iohk": "ghc-8.6.5-iohk",
+        "hackage": "hackage",
+        "hls-1.10": "hls-1.10",
+        "hls-2.0": "hls-2.0",
+        "hls-2.2": "hls-2.2",
+        "hls-2.3": "hls-2.3",
+        "hls-2.4": "hls-2.4",
+        "hls-2.5": "hls-2.5",
+        "hls-2.6": "hls-2.6",
+        "hls-2.7": "hls-2.7",
+        "hls-2.8": "hls-2.8",
+        "hls-2.9": "hls-2.9",
+        "hpc-coveralls": "hpc-coveralls",
+        "hydra": "hydra",
+        "iserv-proxy": "iserv-proxy",
+        "nixpkgs": [
+          "haskellNix",
+          "nixpkgs-unstable"
+        ],
+        "nixpkgs-2003": "nixpkgs-2003",
+        "nixpkgs-2105": "nixpkgs-2105",
+        "nixpkgs-2111": "nixpkgs-2111",
+        "nixpkgs-2205": "nixpkgs-2205",
+        "nixpkgs-2211": "nixpkgs-2211",
+        "nixpkgs-2305": "nixpkgs-2305",
+        "nixpkgs-2311": "nixpkgs-2311",
+        "nixpkgs-2405": "nixpkgs-2405",
+        "nixpkgs-unstable": "nixpkgs-unstable",
+        "old-ghc-nix": "old-ghc-nix",
+        "stackage": "stackage"
+      },
+      "locked": {
+        "lastModified": 1723769442,
+        "narHash": "sha256-dGhNJril+hILFro59PdYWwKZYJ6/2A1hozTanaAu4lE=",
+        "owner": "input-output-hk",
+        "repo": "haskell.nix",
+        "rev": "517ceaa97e38ae211d9c311952cc8be4a4a026cd",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "haskell.nix",
+        "type": "github"
+      }
+    },
+    "hls-1.10": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1680000865,
+        "narHash": "sha256-rc7iiUAcrHxwRM/s0ErEsSPxOR3u8t7DvFeWlMycWgo=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "b08691db779f7a35ff322b71e72a12f6e3376fd9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "1.10.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.0": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1687698105,
+        "narHash": "sha256-OHXlgRzs/kuJH8q7Sxh507H+0Rb8b7VOiPAjcY9sM1k=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "783905f211ac63edf982dd1889c671653327e441",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.0.0.1",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.2": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1693064058,
+        "narHash": "sha256-8DGIyz5GjuCFmohY6Fa79hHA/p1iIqubfJUTGQElbNk=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "b30f4b6cf5822f3112c35d14a0cba51f3fe23b85",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.2.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.3": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1695910642,
+        "narHash": "sha256-tR58doOs3DncFehHwCLczJgntyG/zlsSd7DgDgMPOkI=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "458ccdb55c9ea22cd5d13ec3051aaefb295321be",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.3.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.4": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1699862708,
+        "narHash": "sha256-YHXSkdz53zd0fYGIYOgLt6HrA0eaRJi9mXVqDgmvrjk=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "54507ef7e85fa8e9d0eb9a669832a3287ffccd57",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.4.0.1",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.5": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1701080174,
+        "narHash": "sha256-fyiR9TaHGJIIR0UmcCb73Xv9TJq3ht2ioxQ2mT7kVdc=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "27f8c3d3892e38edaef5bea3870161815c4d014c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.5.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.6": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1705325287,
+        "narHash": "sha256-+P87oLdlPyMw8Mgoul7HMWdEvWP/fNlo8jyNtwME8E8=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "6e0b342fa0327e628610f2711f8c3e4eaaa08b1e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.6.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.7": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1708965829,
+        "narHash": "sha256-LfJ+TBcBFq/XKoiNI7pc4VoHg4WmuzsFxYJ3Fu+Jf+M=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "50322b0a4aefb27adc5ec42f5055aaa8f8e38001",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.7.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.8": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1715153580,
+        "narHash": "sha256-Vi/iUt2pWyUJlo9VrYgTcbRviWE0cFO6rmGi9rmALw0=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "dd1be1beb16700de59e0d6801957290bcf956a0a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.8.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hls-2.9": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1718469202,
+        "narHash": "sha256-THXSz+iwB1yQQsr/PY151+2GvtoJnTIB2pIQ4OzfjD4=",
+        "owner": "haskell",
+        "repo": "haskell-language-server",
+        "rev": "40891bccb235ebacce020b598b083eab9dda80f1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "haskell",
+        "ref": "2.9.0.0",
+        "repo": "haskell-language-server",
+        "type": "github"
+      }
+    },
+    "hpc-coveralls": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1607498076,
+        "narHash": "sha256-8uqsEtivphgZWYeUo5RDUhp6bO9j2vaaProQxHBltQk=",
+        "owner": "sevanspowell",
+        "repo": "hpc-coveralls",
+        "rev": "14df0f7d229f4cd2e79f8eabb1a740097fdfa430",
+        "type": "github"
+      },
+      "original": {
+        "owner": "sevanspowell",
+        "repo": "hpc-coveralls",
+        "type": "github"
+      }
+    },
+    "hydra": {
+      "inputs": {
+        "nix": "nix",
+        "nixpkgs": [
+          "haskellNix",
+          "hydra",
+          "nix",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1671755331,
+        "narHash": "sha256-hXsgJj0Cy0ZiCiYdW2OdBz5WmFyOMKuw4zyxKpgUKm4=",
+        "owner": "NixOS",
+        "repo": "hydra",
+        "rev": "f48f00ee6d5727ae3e488cbf9ce157460853fea8",
+        "type": "github"
+      },
+      "original": {
+        "id": "hydra",
+        "type": "indirect"
+      }
+    },
+    "iserv-proxy": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1717479972,
+        "narHash": "sha256-7vE3RQycHI1YT9LHJ1/fUaeln2vIpYm6Mmn8FTpYeVo=",
+        "owner": "stable-haskell",
+        "repo": "iserv-proxy",
+        "rev": "2ed34002247213fc435d0062350b91bab920626e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "stable-haskell",
+        "ref": "iserv-syms",
+        "repo": "iserv-proxy",
+        "type": "github"
+      }
+    },
+    "lowdown-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1633514407,
+        "narHash": "sha256-Dw32tiMjdK9t3ETl5fzGrutQTzh2rufgZV4A/BbxuD4=",
+        "owner": "kristapsdz",
+        "repo": "lowdown",
+        "rev": "d2c2b44ff6c27b936ec27358a2653caaef8f73b8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "kristapsdz",
+        "repo": "lowdown",
+        "type": "github"
+      }
+    },
+    "nix": {
+      "inputs": {
+        "lowdown-src": "lowdown-src",
+        "nixpkgs": "nixpkgs",
+        "nixpkgs-regression": "nixpkgs-regression"
+      },
+      "locked": {
+        "lastModified": 1661606874,
+        "narHash": "sha256-9+rpYzI+SmxJn+EbYxjGv68Ucp22bdFUSy/4LkHkkDQ=",
+        "owner": "NixOS",
+        "repo": "nix",
+        "rev": "11e45768b34fdafdcf019ddbd337afa16127ff0f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "2.11.0",
+        "repo": "nix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1657693803,
+        "narHash": "sha256-G++2CJ9u0E7NNTAi9n5G8TdDmGJXcIjkJ3NF8cetQB8=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "365e1b3a859281cf11b94f87231adeabbdd878a2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-22.05-small",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-2003": {
+      "locked": {
+        "lastModified": 1620055814,
+        "narHash": "sha256-8LEHoYSJiL901bTMVatq+rf8y7QtWuZhwwpKE2fyaRY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "1db42b7fe3878f3f5f7a4f2dc210772fd080e205",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-20.03-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-2105": {
+      "locked": {
+        "lastModified": 1659914493,
+        "narHash": "sha256-lkA5X3VNMKirvA+SUzvEhfA7XquWLci+CGi505YFAIs=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "022caabb5f2265ad4006c1fa5b1ebe69fb0c3faf",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-21.05-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-2111": {
+      "locked": {
+        "lastModified": 1659446231,
+        "narHash": "sha256-hekabNdTdgR/iLsgce5TGWmfIDZ86qjPhxDg/8TlzhE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "eabc38219184cc3e04a974fe31857d8e0eac098d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-21.11-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-2205": {
+      "locked": {
+        "lastModified": 1685573264,
+        "narHash": "sha256-Zffu01pONhs/pqH07cjlF10NnMDLok8ix5Uk4rhOnZQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "380be19fbd2d9079f677978361792cb25e8a3635",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-22.05-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-2211": {
+      "locked": {
+        "lastModified": 1688392541,
+        "narHash": "sha256-lHrKvEkCPTUO+7tPfjIcb7Trk6k31rz18vkyqmkeJfY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ea4c80b39be4c09702b0cb3b42eab59e2ba4f24b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-22.11-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-2305": {
+      "locked": {
+        "lastModified": 1705033721,
+        "narHash": "sha256-K5eJHmL1/kev6WuqyqqbS1cdNnSidIZ3jeqJ7GbrYnQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a1982c92d8980a0114372973cbdfe0a307f1bdea",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-23.05-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-2311": {
+      "locked": {
+        "lastModified": 1719957072,
+        "narHash": "sha256-gvFhEf5nszouwLAkT9nWsDzocUTqLWHuL++dvNjMp9I=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7144d6241f02d171d25fba3edeaf15e0f2592105",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-23.11-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-2405": {
+      "locked": {
+        "lastModified": 1720122915,
+        "narHash": "sha256-Nby8WWxj0elBu1xuRaUcRjPi/rU3xVbkAt2kj4QwX2U=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "835cf2d3f37989c5db6585a28de967a667a75fb1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-24.05-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-regression": {
+      "locked": {
+        "lastModified": 1643052045,
+        "narHash": "sha256-uGJ0VXIhWKGXxkeNnq4TvV3CIOkUJ3PAoLZ3HMzNVMw=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "215d4d0fd80ca5163643b03a33fde804a29cc1e2",
+        "type": "github"
+      }
+    },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1720181791,
+        "narHash": "sha256-i4vJL12/AdyuQuviMMd1Hk2tsGt02hDNhA0Zj1m16N8=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "4284c2b73c8bce4b46a6adf23e16d9e2ec8da4bb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "old-ghc-nix": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1631092763,
+        "narHash": "sha256-sIKgO+z7tj4lw3u6oBZxqIhDrzSkvpHtv0Kki+lh9Fg=",
+        "owner": "angerman",
+        "repo": "old-ghc-nix",
+        "rev": "af48a7a7353e418119b6dfe3cd1463a657f342b8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "angerman",
+        "ref": "master",
+        "repo": "old-ghc-nix",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "haskellNix": "haskellNix",
+        "nixpkgs": [
+          "haskellNix",
+          "nixpkgs-unstable"
+        ]
+      }
+    },
+    "stackage": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1723594352,
+        "narHash": "sha256-cQVhF1M1et3/XNE1sclwH39prxIDMUojTdnW61t3YrM=",
+        "owner": "input-output-hk",
+        "repo": "stackage.nix",
+        "rev": "c077da02c56031a78adc4bf0cf2b182effc895ed",
+        "type": "github"
+      },
+      "original": {
+        "owner": "input-output-hk",
+        "repo": "stackage.nix",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,56 @@
+{
+  description = "Suntheme's development and build environment";
+
+  inputs.haskellNix.url = "github:input-output-hk/haskell.nix";
+  inputs.nixpkgs.follows = "haskellNix/nixpkgs-unstable";
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    haskellNix,
+  }: let
+    supportedSystems = [
+      "x86_64-linux"
+      "x86_64-darwin"
+      "aarch64-linux"
+      "aarch64-darwin"
+    ];
+  in
+    flake-utils.lib.eachSystem supportedSystems (system: let
+      overlays = [
+        haskellNix.overlay
+        (final: prev: {
+          suntheme = final.haskell-nix.project' {
+            src = ./.;
+            compiler-nix-name = "ghc982";
+            shell.tools = {
+              cabal = {};
+              hlint = {};
+              haskell-language-server = {};
+            };
+            shell.buildInputs = with pkgs; [
+              at
+            ];
+          };
+        })
+      ];
+      pkgs = import nixpkgs {
+        inherit system overlays;
+        inherit (haskellNix) config;
+      };
+      flake = pkgs.suntheme.flake {};
+    in
+      flake
+      // {
+        formatter = pkgs.alejandra;
+
+        packages.default = flake.packages."suntheme:exe:suntheme";
+      });
+
+  nixConfig = {
+    extra-substituters = ["https://cache.iog.io" "https://suntheme.cachix.org"];
+    extra-trusted-public-keys = ["hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ=" "suntheme.cachix.org-1:fHjlz7YAmMUcLp3tsZis8g9wIsDS6HvECGR3uZETGRo="];
+    allow-import-from-derivation = "true";
+  };
+}

suntheme.cabal

@@ -62,22 +62,22 @@ executable suntheme
     main-is:          Main.hs
 
     -- Modules included in this executable, other than Main.
-    -- other-modules:
+    other-modules:    Types, Const, Pure, Time, Sugar, Getters, Cache, Workers
 
     -- LANGUAGE extensions used by modules in this package.
     -- other-extensions:
 
     -- Other library packages from which modules are imported.
-    build-depends:    base ^>=4.17.2.1,
-        request ^>=0.2.2.0, 
-        process ^>=1.6.18.0,
-        bytestring ^>=0.11.5.3,
-        filepath ^>=1.4.2.2,
-        time ^>=1.9.3,
-        solar ^>=0.1.0.0,
-        timerep ^>=2.1.0.0,
-        extra ^>=1.7.16,
-        directory ^>=1.3.8.5
+    build-depends:    base ^>=4.19.1.0,
+                      request ^>=0.2.2.0, 
+                      process ^>=1.6.18.0,
+                      bytestring ^>=0.11.5.3,
+                      filepath ^>=1.4.2.2,
+                      time ^>=1.9.3,
+                      solar ^>=0.1.0.0,
+                      timerep ^>=2.1.0.0,
+                      extra ^>=1.7.16,
+                      directory ^>=1.3.8.5
 
     -- Directories containing source files.
     hs-source-dirs:   app