Bump version

Reviewed-on: #2

.gitea/workflows/build.yml

@@ -0,0 +1,27 @@
+name: build
+on:
+  pull_request:
+jobs:
+  build:
+    container:
+      image: node:24-bookworm
+      env:
+        USER: node
+        HOME: /home/node
+        NIX_CONFIG: experimental-features = nix-command flakes
+      volumes:
+        - /var/lib/pbri/docker/nix_runner_nix:/nix
+        - /var/lib/pbri/docker/nix_runner_etc:/etc/nix
+        - /var/lib/pbri/docker/nix_runner_home_node:/home/node
+      options: --user 1000:1000
+    steps:
+      - name: Prep nix env
+        run: |
+          if [ ! -f ~/.nix-profile/etc/profile.d/nix.sh ]; then
+            curl -L https://nixos.org/nix/install | bash -s -- --no-daemon
+          fi
+          . ~/.nix-profile/etc/profile.d/nix.sh 
+          env >> "$GITHUB_ENV"
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - run: nix build --log-format raw --print-build-logs .#yore

.gitea/workflows/deliver.yml

@@ -0,0 +1,40 @@
+name: deliver
+on:
+  push:
+    tags:
+      - 'v*'
+jobs:
+  deliver:
+    container:
+      image: node:24-bookworm
+      env:
+        USER: node
+        HOME: /home/node
+        NIX_CONFIG: experimental-features = nix-command flakes
+      volumes:
+        - /var/lib/pbri/docker/nix_runner_nix:/nix
+        - /var/lib/pbri/docker/nix_runner_etc:/etc/nix
+        - /var/lib/pbri/docker/nix_runner_home_node:/home/node
+      options: --user 1000:1000
+    steps:
+      - name: Prep nix env
+        run: |
+          if [ ! -f ~/.nix-profile/etc/profile.d/nix.sh ]; then
+            curl -L https://nixos.org/nix/install | bash -s -- --no-daemon
+          fi
+          . ~/.nix-profile/etc/profile.d/nix.sh
+          env >> "$GITHUB_ENV"
+      - name: Checkout repo
+        uses: actions/checkout@v4
+      - name: Get image meta
+        run: nix build .#yore-meta -o /tmp/yore-meta
+      - name: Version check
+        run: |
+          VERSION=$(cat /tmp/yore-meta/version)
+          [ "$GITHUB_REF_NAME" = v"$VERSION" ]
+      - run: nix build --log-format raw --print-build-logs .#image -o image.tar.gz
+      - run: gunzip -c image.tar.gz > image.tar
+      - run: nix run .#crane -- auth login git.pbrinkmeier.de -u paul -p "$PASSWORD"
+        env:
+          PASSWORD: "${{ secrets.REGISTRY_PASSWORD }}"
+      - run: nix run .#crane -- push image.tar $(cat /tmp/yore-meta/image-tag)

README.md

@@ -1,5 +1,12 @@
 # yore
 
+[fz.beany.club](https://fz.beany.club) shows the [Freiburger Zeitung](https://www.ub.uni-freiburg.de/?id=117) (an important Freiburg im Breisgau newspaper going back to 1784) from exactly 100 years ago.
+It is feature-poor on purpose: You can browse a daily issue during your coffee break and that is basically it.
+
+| ![A story about cheese](readme-images/kaese.jpg) | ![Locarno Treaties signed](readme-images/locarno.jpg) |
+| --- | --- |
+| October 5th, 1925 | September 15th, 1926 |
+
 ## Development
 
 `flake.nix` defines a development shell that has everything you'll need. To enter, run
@@ -25,7 +32,7 @@ You can also use it to run a database for development by choosing a `$COMMAND` t
 ```
 BASE_DIR=./pgdata scripts/with-db psql "dbname=yore-test port=5433 user=yore-test"
 # cabal repl with env vars set
-BASE_DIR=./pgdata scripts/with-db scripts/dev
+BASE_DIR=./pgdata scripts/with-db cabal run
 ```
 
 By setting `$BASE_DIR` you can persist the database for later runs.
@@ -41,6 +48,10 @@ By setting `$BASE_DIR` you can persist the database for later runs.
 
 ## TODO
 
-- CI
-- Docker container (in flake)
-- try fourmolu
+- [x] CI
+- [x] Docker container (in flake)
+- [x] try fourmolu
+- [x] Test leap second handling in the `time` package
+- [x] Fix container shutdown delay
+- [ ] Fix `responseFile` always returning 200
+- [x] Vendor PDF.js for consistent cross-platform PDF rendering

app/Main.hs

@@ -10,29 +10,30 @@
 
 module Main (main) where
 
+import Control.Concurrent (forkIO)
+import Control.Monad (forM, forM_)
 import Control.Monad.IO.Class (liftIO)
-import Control.Monad.Trans.Except (ExceptT (..), runExceptT)
+import Control.Monad.Trans.Except (ExceptT (..), catchE, runExceptT)
+import Data.Bifunctor (Bifunctor (..))
 import Data.Proxy (Proxy (..))
 import Data.Text (Text)
-import Data.Time (Day, toGregorian)
+import Data.Time (Day, LocalTime (..), TimeOfDay (..), ZonedTime (..), addDays, nominalDiffTimeToSeconds, toGregorian)
 import GHC.Generics (Generic)
-import Network.HTTP.Media ((//), (/:))
-import Network.HTTP.Types (Status (..), mkStatus, status200)
+import Network.HTTP.Types (Status (..))
+import Network.Wai (Middleware, Request (..), responseStatus)
 import Servant
-  ( Accept (..)
-  , Capture
+  ( Capture
   , Get
   , Handler
   , MimeRender (..)
   , Raw
   , ServerError (..)
   , ServerT
-  , Tagged (..)
   , err404
   , err500
   , hoistServer
-  , runHandler
   , serve
+  , serveDirectoryWebApp
   , (:<|>) (..)
   , (:>)
   , pattern MkHandler
@@ -48,30 +49,30 @@ import qualified Data.ByteString.Lazy as LBS
 import qualified Data.Text as Text
 import qualified Data.Text.Encoding as Encoding
 import qualified Database.PostgreSQL.Opium as Opium
-import Network.Wai (Application, Request (..), Response, responseFile, responseLBS)
 import qualified Network.Wai.Handler.Warp as Warp
 import qualified Text.Blaze.Html5 as H
 import qualified Text.Blaze.Html5.Attributes as A
 
 import Envy (type (=@!), type (=@@), type (?))
-import Yore.DB (DayFile (..))
+import Yore.DB (DB, DayFile (..))
+import Yore.Download (downloadInto)
 import Yore.Error (Error (..))
+import Yore.Schedule (schedule)
+import Yore.Scrape (Issue (..), getIssuesByDay)
+import Yore.Servant (GetSendfile, HTML, Sendfile (..))
 import Yore.Time (addYears, getCurrentDay, getSecondsUntilMidnight)
 
+import Data.Fixed (Pico)
+import Data.Time.Clock.POSIX (getPOSIXTime)
 import qualified Envy
 import qualified Yore.DB as DB
 import qualified Yore.Log as Log
 
-newtype ConnectionString = ConnectionString String
-  deriving (Show)
-
-instance Envy.ReadEnvVar ConnectionString where
-  readEnvVar = fmap ConnectionString . Envy.readEnvVar
-
 data ConfigT f = Config
   { yorePort :: f =@@ Int ? 3000
   , yoreDownloadDir :: f =@@ FilePath ? "./download"
   , yoreDb :: f =@! Text
+  , yoreStaticDir :: f =@@ FilePath ? "./static"
   }
   deriving (Generic)
 
@@ -81,34 +82,69 @@ deriving instance Show Config
 
 main :: IO ()
 main = do
+  Log.setup
+
   cfg <-
     Envy.load @ConfigT >>= \case
-      Left err -> do
-        Log.error $ printf "failed to read config: %s" err
+      Left errs -> do
+        forM_ errs $ Log.error . printf "failed to read config: %s"
         exitFailure
       Right c ->
         pure c
 
-  let
+  db <- DB.initDB cfg.yoreDb
+
+  _ <- runExceptT $ doIndex cfg db
+
+  _ <- forkIO $ runIndexer cfg db
+  runServer cfg db
+
+runIndexer :: Config -> DB -> IO ()
+runIndexer cfg db =
+  schedule shouldRunAt $ runExceptT $ doIndex cfg db
+  where
+    shouldRunAt zt = case localTimeOfDay $ zonedTimeToLocalTime zt of
+      TimeOfDay 3 0 _ -> True
+      _ -> False
+
+doIndex :: Config -> DB -> ExceptT Error IO ()
+doIndex cfg db =
+  catchE
+    ( DB.withTransaction db $ \conn -> do
+        forM_ [0, 1, 2] $ \i -> do
+          dayThen <- getTodayWithOffset (-100) i
+          indexDay cfg dayThen conn
+    )
+    (Log.error . show)
+
+runServer :: Config -> DB -> IO ()
+runServer cfg db =
+  Warp.runSettings settings $ loggerMiddleware $ serve (Proxy @API) $ hoistServer (Proxy @API) nt $ server cfg db
+  where
     settings =
       foldr
         ($)
         Warp.defaultSettings
-        [ Warp.setLogger logger
-        , Warp.setPort cfg.yorePort
+        [ Warp.setPort cfg.yorePort
         , Warp.setBeforeMainLoop $ Log.info $ printf "listening on port %d" cfg.yorePort
         , Warp.setOnException onException
         ]
 
-  db <- DB.initDB cfg.yoreDb
-  Warp.runSettings settings $ serve (Proxy @API) $ hoistServer (Proxy @API) nt $ server cfg db
-  where
-    logger req status _ = do
-      Log.info $
-        printf
-          "%d %s"
-          (statusCode status)
-          (requestLine req)
+    logger :: Request -> Status -> Pico -> IO ()
+    logger req status s = do
+      Log.info $ printf "%d %s %ss" (statusCode status) (requestLine req) (formatMetric s)
+
+    loggerMiddleware :: Middleware
+    loggerMiddleware app req respond = do
+      begin <- getPOSIXTime
+      app req $ \res -> do
+        rr <- respond res
+        end <- getPOSIXTime
+        logger req (responseStatus res) (nominalDiffTimeToSeconds (end - begin))
+        pure rr
+
+    onException mbReq ex = do
+      Log.error $ printf "unhandled exception%s: %s%s" (maybe "" ((" in " ++) . requestLine) mbReq) (show ex)
 
     requestLine :: Request -> String
     requestLine req =
@@ -117,8 +153,17 @@ main = do
         (BS8.unpack $ requestMethod req)
         (BS8.unpack $ rawPathInfo req <> rawQueryString req)
 
-    onException mbReq ex = do
-      Log.error $ printf "unhandled exception%s: %s%s" (maybe "" ((" in " ++) . requestLine) mbReq) (show ex)
+formatMetric :: Pico -> String
+formatMetric x = go (-9) prefixes
+  where
+    prefixes = ["p", "n", "u", "m", "", "k", "M", "G"]
+
+    go :: Int -> [String] -> String
+    go _ [] = show x
+    go e (p : ps)
+      | x < 10 ^^ e =
+          show @Int (floor $ x * 10 ^^ (-e + 3)) ++ p
+      | otherwise = go (e + 3) ps
 
 nt :: ExceptT Error IO a -> Handler a
 nt action = MkHandler $ do
@@ -130,11 +175,6 @@ nt action = MkHandler $ do
     Right x ->
       pure $ Right x
 
-type API =
-  Get '[HTML] RootModel
-    :<|> "today" :> "issue" :> Capture "issue" Int :> Get '[HTML] RootModel
-    :<|> "api" :> "today" :> "issue" :> Capture "issue" Int :> "fz.pdf" :> Raw
-
 toServerError :: Error -> ServerError
 toServerError = \case
   ConnectionError msg ->
@@ -149,39 +189,39 @@ toServerError = \case
 encodeUtf8LBS :: String -> LBS.ByteString
 encodeUtf8LBS = LBS.fromStrict . Encoding.encodeUtf8 . Text.pack
 
-handlerToRaw :: ExceptT Error IO Response -> Tagged t Application
-handlerToRaw handler = Tagged $ \_ respond -> do
-  r <- runHandler $ nt handler
-  case r of
-    Left e ->
-      respond $ responseLBS (mkStatus e.errHTTPCode $ BS8.pack e.errReasonPhrase) e.errHeaders e.errBody
-    Right response ->
-      respond response
+type API =
+  Get '[HTML] RootModel
+    :<|> "today" :> "issue" :> Capture "issue" Int :> Get '[HTML] RootModel
+    :<|> "static" :> Raw
+    :<|> "api" :> "today" :> "issue" :> Capture "issue" Int :> "fz.pdf" :> GetSendfile
 
-server :: Config -> DB.DB -> ServerT API (ExceptT Error IO)
-server cfg db = rootR :<|> todayR :<|> apiTodayR
+server :: Config -> DB -> ServerT API (ExceptT Error IO)
+server cfg db = rootR :<|> todayR :<|> staticR :<|> apiTodayR
   where
     rootR = todayR 0
 
     todayR issue = do
-      dateThen <- ExceptT get100YearsAgo
-      count <- ExceptT $ DB.withConn db $ DB.getNumberOfIssues dateThen
-      dayFile <- ExceptT $ DB.withConn db $ DB.getDayFileByIssue dateThen issue
+      dateThen <- getTodayWithOffset (-100) 0
+      count <- DB.withConn db $ DB.getNumberOfIssues dateThen
+      dayFile <- DB.withConn db $ DB.getDayFileByIssue dateThen issue
       pure $ RootModel dateThen dayFile issue count
 
-    apiTodayR issue = handlerToRaw $ do
-      dateThen <- ExceptT get100YearsAgo
-      dayFile <- ExceptT $ DB.withConn db $ DB.getDayFileByIssue dateThen issue
+    staticR = serveDirectoryWebApp cfg.yoreStaticDir
+
+    apiTodayR issue = do
+      dateThen <- getTodayWithOffset (-100) 0
+      dayFile <- DB.withConn db $ DB.getDayFileByIssue dateThen issue
       let fullPath = cfg.yoreDownloadDir </> dayFile.relative_path
       secondsUntilMidnight <- liftIO getSecondsUntilMidnight
-      pure $
-        responseFile
-          status200
-          [ ("content-type", "application/pdf")
-          , ("cache-control", BS8.pack $ printf "public, max-age=%d" secondsUntilMidnight)
-          ]
-          fullPath
-          Nothing
+      pure
+        Sendfile
+          { headers =
+              [ ("content-type", "application/pdf")
+              , ("cache-control", BS8.pack $ printf "public, max-age=%d" secondsUntilMidnight)
+              ]
+          , path =
+              fullPath
+          }
 
 data RootModel = RootModel Day DB.DayFile Int Int
 
@@ -203,7 +243,7 @@ instance MimeRender HTML RootModel where
           H.iframe ! A.src (H.toValue url) ! A.class_ "content" $ mempty
     where
       url :: String
-      url = printf "/api/today/issue/%d/fz.pdf" issue
+      url = printf "/static/pdfjs-5.7.284-dist/web/viewer.html?file=/api/today/issue/%d/fz.pdf#zoom=page-width" issue
 
       (y, m, d) = toGregorian dateThen
 
@@ -217,11 +257,31 @@ instance MimeRender HTML RootModel where
 
 -- Utils
 
-data HTML
+getTodayWithOffset :: Integer -> Integer -> ExceptT Error IO Day
+getTodayWithOffset yearOffset dayOffset =
+  ExceptT $
+    first (GenericError . (Text.pack (printf "can't go back %d years and go forward %d days: " (-yearOffset) dayOffset) <>))
+      . addYears yearOffset
+      . addDays dayOffset
+      <$> getCurrentDay
 
-instance Accept HTML where
-  contentType _ = "text" // "html" /: ("charset", "utf-8")
-
-get100YearsAgo :: IO (Either Error Day)
-get100YearsAgo =
-  either (Left . GenericError . ("can't go back 100 years: " <>)) Right . addYears (-100) <$> getCurrentDay
+indexDay :: Config -> Day -> Opium.Connection -> ExceptT Error IO ()
+indexDay cfg dayThen conn = do
+  -- Transaction-level lock released automatically after transaction
+  DB.lift $ Opium.execute_ "SELECT pg_advisory_xact_lock(42);" conn
+  mbDi <- DB.readDayIndex dayThen conn
+  case mbDi of
+    Just _ ->
+      Log.info $ printf "index for %s already exists." (show dayThen)
+    Nothing -> do
+      Log.info $ printf "scraping issues for %s" (show dayThen)
+      issues <- liftIO $ getIssuesByDay dayThen
+      paths <- forM issues $ \issue -> do
+        Log.info $ printf "downloading %s" issue.url
+        path <- downloadInto cfg.yoreDownloadDir issue.url
+        pure (issue.label, path)
+      Log.info "creating DB entries"
+      dayIndex <- DB.createDayIndex dayThen conn
+      forM_ paths $ \(text, url) ->
+        DB.createDayFile dayIndex.day_index_id text url conn
+      Log.info "done."

db/schema.sql

@@ -1,3 +1,8 @@
+\restrict CAC30PXzQJosjH02Spia1vzj9Ui3LB1Cq2HI8r0A4eu33HP8ngxbbM2SzRfTj0c
+
+-- Dumped from database version 17.6
+-- Dumped by pg_dump version 17.6
+
 SET statement_timeout = 0;
 SET lock_timeout = 0;
 SET idle_in_transaction_session_timeout = 0;
@@ -124,6 +129,8 @@ ALTER TABLE ONLY yore.day_file
 -- PostgreSQL database dump complete
 --
 
+\unrestrict CAC30PXzQJosjH02Spia1vzj9Ui3LB1Cq2HI8r0A4eu33HP8ngxbbM2SzRfTj0c
+
 
 --
 -- Dbmate schema migrations

flake.lock

@@ -40,11 +40,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1752536923,
-        "narHash": "sha256-fdgPZR7VFSSRIQKOJLcs3qCJBWM64Uak0gAGtWTYAd8=",
+        "lastModified": 1758518877,
+        "narHash": "sha256-1K1c6vNr/N1PfM77DqKINXQ/oCxA0W1ZJ80sfNzWu0w=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "c665e4d918eda5d78a175ed8d300809c44932160",
+        "rev": "033cc13ab4c1a60b3527b242755aa625001ff1f9",
         "type": "github"
       },
       "original": {
@@ -64,11 +64,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1756064767,
-        "narHash": "sha256-SaJK9VYc/oF5aBSMSW+We8TggER4+uTAHvc2ztnLpYo=",
+        "lastModified": 1759790870,
+        "narHash": "sha256-rEsaO38v2wvAThPzgbYPgnv29mu6GxTYLjgci3GYaO4=",
         "ref": "main",
-        "rev": "af16429d827816cf9bec69026e13f50acc3d2691",
-        "revCount": 65,
+        "rev": "4db509c1b52ee7b5012abfef5e11e62beab27a16",
+        "revCount": 66,
         "type": "git",
         "url": "https://git.pbrinkmeier.de/paul/opium"
       },

flake.nix

@@ -26,17 +26,24 @@
         };
 
         # For building the package, we use only the files not ignored by Git as inputs.
-        # Also, flake.nix and flake.lock are not included to avoid rebuilds when
+        # Also, flake.nix, flake.lock and .gitea are not included to avoid rebuilds when
         # working on them.
         src = pkgs.lib.cleanSourceWith {
-          src = gitignore.lib.gitignoreSource ./.;
-          filter = path: type: builtins.elem (builtins.baseNameOf path) [ "flake.nix" "flake.lock" ];
+          src = ./.;
+          filter = gitignore.lib.gitignoreFilterWith {
+            basePath = ./.;
+            extraRules = ''
+              flake.nix
+              flake.lock
+              .gitea
+            '';
+          };
         };
 
         yore = pkgs.lib.pipe
           # The basic package
           (pkgs.haskellPackages.developPackage {
-            root = ./.;
+            root = src;
             overrides = addOpium;
           })
           # And some build configuration.
@@ -51,16 +58,51 @@
             # Return only the bin folder to curb image size
             compose.justStaticExecutables
           ];
+
+        image =
+          pkgs.dockerTools.buildImage {
+            name = "git.pbrinkmeier.de/paul/yore";
+            tag = yore.version;
+            copyToRoot = [ pkgs.cacert ];
+            config = {
+              Cmd = [ "${entrypoint}/bin/run" ];
+              StopSignal = "SIGINT";
+            };
+          };
+
+        entrypoint = pkgs.writeShellApplication {
+          name = "run";
+          runtimeInputs = [ pkgs.coreutils pkgs.dbmate yore ];
+          text = ''
+            set -Eeuo pipefail
+
+            mkdir -p "''${YORE_DBMATE_DIR}"
+            TMPDIR=$(mktemp -dp "''${YORE_DBMATE_DIR}")
+            mkdir -p "''${TMPDIR}/db"
+            cp -r ${./db}/* "''${TMPDIR}/db"
+            cd "''${TMPDIR}"
+            dbmate up
+            chmod +w -R "''${TMPDIR}"
+            rm -rf "''${TMPDIR}"
+
+            echo ${./static}
+            export YORE_STATIC_DIR=${./static}
+
+            # Replace bash and inherit PID 1
+            cd /
+            exec yore
+          '';
+        };
       in {
         packages = rec {
-          docker =
-            pkgs.dockerTools.buildImage {
-              name = "git.pbrinkmeier.de/paul/yore";
-              tag = yore.version;
-              config.Cmd = [ "${yore}/bin/yore" ];
-            };
-
           default = yore;
+          inherit yore image;
+          yore-meta = pkgs.runCommand "yore-meta" {} ''
+            mkdir -p $out
+            echo -n ${yore.version} > $out/version
+            echo -n ${image.drvAttrs.imageName}:${image.drvAttrs.imageTag} > $out/image-tag
+          '';
+
 
           opium_ = opium.packages.${system}.opium;
         };
@@ -82,5 +124,11 @@
               overrides = addOpium;
             }).env;
         };
+        apps = {
+          crane = {
+            type = "app";
+            program = "${pkgs.crane}/bin/crane";
+          };
+        };
       });
 }

scripts/dev

@@ -1,3 +0,0 @@
-#!/usr/bin/env bash
-
-YORE_DB="host=localhost port=${DB_PORT} user=${DB_USER} dbname=${DB_DBNAME}" cabal repl exe:yore

scripts/with-db

@@ -26,4 +26,6 @@ fi
 
 DATABASE_URL="postgres://${DB_USER}@localhost:${DB_PORT}/${DB_DBNAME}?sslmode=disable" dbmate up
 
+export YORE_DB="host=localhost port=${DB_PORT} user=${DB_USER} dbname=${DB_DBNAME}" 
+
 "$@"

src/Envy.hs

@@ -56,13 +56,13 @@ type t ? d = Optional t d
 load
   :: forall (m :: ConfigVariant -> Type)
    . (Generic (m Value), GFromEnv (Rep (m Spec)) (Rep (m Value)))
-  => IO (Either String (m Value))
+  => IO (Either [String] (m Value))
 load = do
   env <- getEnvironment
   pure $ to <$> gFromEnv @(Rep (m Spec)) @(Rep (m Value)) Proxy env
 
 class GFromEnv spec value where
-  gFromEnv :: Proxy (spec c) -> [(String, String)] -> Either String (value c)
+  gFromEnv :: Proxy (spec c) -> [(String, String)] -> Either [String] (value c)
 
 instance
   (GFromEnv i o)
@@ -77,7 +77,15 @@ instance
   gFromEnv Proxy env = M1 <$> gFromEnv @i @o Proxy env
 
 instance (GFromEnv i1 o1, GFromEnv i2 o2) => GFromEnv (i1 :*: i2) (o1 :*: o2) where
-  gFromEnv Proxy env = (:*:) <$> gFromEnv @i1 @o1 Proxy env <*> gFromEnv @i2 @o2 Proxy env
+  gFromEnv Proxy env =
+    case (eLhs, eRhs) of
+      (Left errs1, Right _) -> Left errs1
+      (Right _, Left errs2) -> Left errs2
+      (Left errs1, Left errs2) -> Left $ errs1 ++ errs2
+      (Right lhs, Right rhs) -> Right $ lhs :*: rhs
+    where
+      eLhs = gFromEnv @i1 @o1 Proxy env
+      eRhs = gFromEnv @i2 @o2 Proxy env
 
 instance
   (KnownSymbol sym, EnvVarSpec s t)
@@ -86,7 +94,7 @@ instance
       (M1 S meta2 (Rec0 t))
   where
   gFromEnv Proxy env =
-    M1 . K1 <$> decodeEnvVar @s @t Proxy varName (lookup varName env)
+    M1 . K1 <$> first (: []) (decodeEnvVar @s @t Proxy varName (lookup varName env))
     where
       varName = selectorNameToEnvVarName $ symbolVal $ Proxy @sym
 

src/Yore/DB.hs

@@ -9,6 +9,7 @@ module Yore.DB
   , Error (..)
   , initDB
   , withConn
+  , withTransaction
   , DayIndex (..)
   , DayFile (..)
   , createDayFile
@@ -17,9 +18,11 @@ module Yore.DB
   , readDayPaths
   , getDayFileByIssue
   , getNumberOfIssues
+  , lift
   ) where
 
 import Control.Concurrent (getNumCapabilities)
+import Control.Monad.Trans.Except (ExceptT (..), catchE, runExceptT, throwE)
 import Data.Functor.Identity (Identity (..))
 import Data.Pool (Pool, defaultPoolConfig, newPool, withResource)
 import Data.Text (Text)
@@ -28,6 +31,7 @@ import GHC.Generics (Generic)
 
 import qualified Database.PostgreSQL.Opium as Opium
 
+import Data.Bifunctor (Bifunctor (..))
 import Yore.Error (Error (..))
 
 newtype DB = DB (Pool (Either Opium.ConnectionError Opium.Connection))
@@ -45,13 +49,35 @@ initDB connString = do
           maxResources
       )
 
-withConn :: DB -> (Opium.Connection -> IO (Either Opium.Error a)) -> IO (Either Error a)
+-- TODO: This should probably also do something like bracket...
+-- For now let's assume no exceptions are thrown in f.
+withConn :: DB -> (Opium.Connection -> ExceptT Error IO a) -> ExceptT Error IO a
 withConn (DB connPool) f =
-  withResource connPool $ \case
+  ExceptT $ withResource connPool $ \case
     Left connectionError ->
       pure $ Left $ ConnectionError connectionError
     Right conn ->
-      either (Left . DBError) Right <$> f conn
+      runExceptT $ f conn
+
+withTransaction :: DB -> (Opium.Connection -> ExceptT Error IO a) -> ExceptT Error IO a
+withTransaction db f =
+  withConn db $ \conn ->
+    ( do
+        lift $ Opium.execute_ "BEGIN" conn
+        x <- f conn
+        lift $ Opium.execute_ "COMMIT" conn
+        pure x
+    )
+      `catchE` ( \err -> do
+                  -- rollback open transactions and release transaction level locks...
+                  lift $ Opium.execute_ "ROLLBACK" conn
+                  -- ...then rethrow the error so the app can handle it too.
+                  throwE err
+               )
+
+lift :: IO (Either Opium.Error a) -> ExceptT Error IO a
+lift f =
+  ExceptT $ first DBError <$> f
 
 data DayIndex = DayIndex
   { day_index_id :: Int
@@ -72,44 +98,47 @@ newtype CountResult = CountResult
   }
   deriving (Show, Generic, Opium.FromRow)
 
-createDayIndex :: Day -> Opium.Connection -> IO (Either Opium.Error DayIndex)
+createDayIndex :: Day -> Opium.Connection -> ExceptT Error IO DayIndex
 createDayIndex date =
   ex runIdentity
     . Opium.fetch
       "INSERT INTO yore.day_index (day) VALUES ($1) RETURNING *"
       (Identity date)
 
-createDayFile :: Int -> Text -> FilePath -> Opium.Connection -> IO (Either Opium.Error ())
+createDayFile :: Int -> Text -> FilePath -> Opium.Connection -> ExceptT Error IO ()
 createDayFile dayId label path =
-  Opium.execute
-    "INSERT INTO yore.day_file (day_index_id, label, relative_path) VALUES ($1, $2, $3)"
-    (dayId, label, path)
+  lift
+    . Opium.execute
+      "INSERT INTO yore.day_file (day_index_id, label, relative_path) VALUES ($1, $2, $3)"
+      (dayId, label, path)
 
-readDayIndex :: Day -> Opium.Connection -> IO (Either Opium.Error (Maybe DayIndex))
+readDayIndex :: Day -> Opium.Connection -> ExceptT Error IO (Maybe DayIndex)
 readDayIndex date =
-  Opium.fetch
-    "SELECT * FROM yore.day_index WHERE day = $1"
-    (Identity date)
+  lift
+    . Opium.fetch
+      "SELECT * FROM yore.day_index WHERE day = $1"
+      (Identity date)
 
-readDayPaths :: Day -> Opium.Connection -> IO (Either Opium.Error [(DayIndex, DayFile)])
+readDayPaths :: Day -> Opium.Connection -> ExceptT Error IO [(DayIndex, DayFile)]
 readDayPaths date =
-  Opium.fetch
-    "SELECT * FROM yore.day_index LEFT JOIN yore.day_file USING (day_index_id) WHERE day = $1"
-    (Identity date)
+  lift
+    . Opium.fetch
+      "SELECT * FROM yore.day_index LEFT JOIN yore.day_file USING (day_index_id) WHERE day = $1"
+      (Identity date)
 
-getDayFileByIssue :: Day -> Int -> Opium.Connection -> IO (Either Opium.Error DayFile)
+getDayFileByIssue :: Day -> Int -> Opium.Connection -> ExceptT Error IO DayFile
 getDayFileByIssue date issue =
   ex runIdentity
     . Opium.fetch
       "SELECT yore.day_file.* FROM yore.day_index LEFT JOIN yore.day_file USING (day_index_id) WHERE day = $1 ORDER BY day_file_id LIMIT 1 OFFSET $2"
       (date, issue)
 
-getNumberOfIssues :: Day -> Opium.Connection -> IO (Either Opium.Error Int)
+getNumberOfIssues :: Day -> Opium.Connection -> ExceptT Error IO Int
 getNumberOfIssues date =
   ex (count . runIdentity)
     . Opium.fetch
       "SELECT count(*) FROM yore.day_index LEFT JOIN yore.day_file USING (day_index_id) WHERE day = $1"
       (Identity date)
 
-ex :: (a -> b) -> IO (Either e a) -> IO (Either e b)
-ex = fmap . fmap
+ex :: (a -> b) -> IO (Either Opium.Error a) -> ExceptT Error IO b
+ex f = fmap f . lift

src/Yore/Download.hs

@@ -2,7 +2,8 @@
 
 module Yore.Download (downloadInto) where
 
-import Control.Monad (guard)
+import Control.Exception (Exception, IOException, catch)
+import Control.Monad.Trans.Except (ExceptT (..))
 import Data.Maybe (fromJust)
 import Data.Text (Text)
 import Network.HTTP.Req hiding (queryParam)
@@ -14,6 +15,8 @@ import qualified Data.Text as Text
 import qualified Data.UUID.V4 as UUID
 import qualified Text.URI as URI
 
+import Yore.Error (Error (..))
+
 -- | Download a URL and save it to a directory.
 -- Returns the path of the downloaded file relative to the directory.
 downloadInto
@@ -21,22 +24,30 @@ downloadInto
   -- ^ Directory where to store the file.
   -> Text
   -- ^ The URL to download.
-  -> IO FilePath
-downloadInto downloadDir textUrl = download >>= save
+  -> ExceptT Error IO FilePath
+downloadInto downloadDir textUrl =
+  download >>= save
   where
-    download :: IO LBS.ByteString
-    download = do
+    download :: ExceptT Error IO LBS.ByteString
+    download = toExceptT (handle @HttpException) $ do
       uri <- URI.mkURI textUrl
       let (url, opts) = fromJust $ useHttpsURI uri
       res <- runReq defaultHttpConfig $ req GET url NoReqBody lbsResponse opts
-      guard $ responseStatusCode res == 200
       pure $ responseBody res
 
-    save :: LBS.ByteString -> IO FilePath
-    save contents = do
+    save :: LBS.ByteString -> ExceptT Error IO FilePath
+    save contents = toExceptT (handle @IOException) $ do
       let suffix = takeExtension $ Text.unpack textUrl
       uuid <- UUID.nextRandom
       let fullPath = downloadDir </> show uuid <.> suffix
       createDirectoryIfMissing True downloadDir
       LBS.writeFile fullPath contents
       pure $ makeRelative downloadDir fullPath
+
+    toExceptT :: (Exception e) => (e -> Error) -> IO a -> ExceptT Error IO a
+    toExceptT showException f =
+      ExceptT $ (Right <$> f) `catch` (pure . Left . showException)
+
+    handle :: (Show e) => e -> Error
+    handle =
+      GenericError . Text.pack . show

src/Yore/Index.hs

@@ -1,24 +0,0 @@
-{-# LANGUAGE OverloadedRecordDot #-}
-{-# LANGUAGE OverloadedStrings #-}
-
-module Yore.Index (createEntries) where
-
-import Control.Exception (Exception, throwIO)
-import Control.Monad (forM_)
-import Data.Text (Text)
-import Data.Time (Day)
-
-import qualified Database.PostgreSQL.Opium as Opium
-
-import qualified Yore.DB as DB
-
-createEntries :: Day -> [(Text, FilePath)] -> Opium.Connection -> IO ()
-createEntries date urls conn = do
-  confidently $ Opium.execute_ "BEGIN" conn
-  dayIndex <- confidently $ DB.createDayIndex date conn
-  forM_ urls $ \(text, url) ->
-    confidently $ DB.createDayFile dayIndex.day_index_id text url conn
-  confidently $ Opium.execute_ "COMMIT" conn
-
-confidently :: (Exception e) => IO (Either e a) -> IO a
-confidently action = action >>= either throwIO pure

src/Yore/Log.hs

@@ -1,21 +1,29 @@
-module Yore.Log (Yore.Log.error, info) where
+module Yore.Log (Yore.Log.error, info, setup) where
 
+import Control.Monad.IO.Class (MonadIO (..))
 import Data.Time (ZonedTime, getZonedTime)
 import Data.Time.Format (defaultTimeLocale, formatTime)
 import GHC.Stack (HasCallStack, SrcLoc (..), callStack, getCallStack)
+import System.IO (BufferMode (..), hSetBuffering, stdout)
 import Text.Printf (printf)
 
-info :: (HasCallStack) => String -> IO ()
+import qualified Data.Text as Text
+import qualified Data.Text.IO as TextIO
+
+setup :: IO ()
+setup = hSetBuffering stdout LineBuffering
+
+info :: (HasCallStack, MonadIO m) => String -> m ()
 info = doLog "INF"
 
-error :: (HasCallStack) => String -> IO ()
+error :: (HasCallStack, MonadIO m) => String -> m ()
 error = doLog "ERR"
 
-doLog :: (HasCallStack) => String -> String -> IO ()
-doLog level msg = do
+doLog :: (HasCallStack, MonadIO m) => String -> String -> m ()
+doLog level msg = liftIO $ do
   now <- getZonedTime
   let location = getLocation $ getCallStack callStack
-  printf "(%s) (%s) (%s) %s\n" (iso8601Show now) level location msg
+  TextIO.putStrLn $ Text.pack $ printf "(%s) (%s) (%s) %s" (iso8601Show now) level location msg
   where
     getLocation :: [(String, SrcLoc)] -> String
     -- First entry is always a function from this module, skip it

src/Yore/Repl.hs

@@ -1,59 +0,0 @@
-{-# LANGUAGE LambdaCase #-}
-{-# LANGUAGE OverloadedRecordDot #-}
-{-# LANGUAGE OverloadedStrings #-}
-
-module Yore.Repl (connect, exec, getToday, indexDay, addYears) where
-
-import Control.Exception (bracket, throwIO)
-import Control.Monad (forM)
-import Data.Time (Day, getZonedTime, localDay, zonedTimeToLocalTime)
-import Text.Printf (printf)
-
-import qualified Database.PostgreSQL.Opium as Opium
-
-import Yore.DB (DayIndex)
-import Yore.Download (downloadInto)
-import Yore.Index (createEntries)
-import Yore.Scrape (Issue (..), getIssuesByDay)
-import Yore.Time (addYears)
-
-import qualified Yore.DB as DB
-
-connect :: IO Opium.Connection
-connect =
-  Opium.connect "host=localhost port=5433 user=yore-test" >>= \case
-    Left e -> error $ show e
-    Right c -> pure c
-
-exec :: (Opium.Connection -> IO a) -> IO a
-exec = bracket connect Opium.close
-
-getToday :: IO [Issue]
-getToday = do
-  now <- getZonedTime
-  print now
-  let currentDay = localDay $ zonedTimeToLocalTime now
-  case addYears (-100) currentDay of
-    Right then_ ->
-      getIssuesByDay then_
-    Left _ ->
-      pure []
-
-indexDay :: Day -> IO ()
-indexDay date = exec $ \conn -> do
-  either throwIO pure =<< Opium.execute_ "SELECT pg_advisory_lock(42);" conn
-  printf "Checking whether %s already exists...\n" (show date)
-  mbDi <- either throwIO pure =<< DB.readDayIndex date conn
-  case mbDi of
-    Just (_ :: DayIndex) ->
-      putStrLn "Nothing to do."
-    Nothing -> do
-      putStrLn "Retrieving URLs..."
-      issues <- getIssuesByDay date
-      paths <- forM issues $ \issue -> do
-        printf "Downloading %s...\n" issue.url
-        path <- downloadInto "./download" issue.url
-        pure (issue.label, path)
-      putStrLn "Creating DB entries..."
-      createEntries date paths conn
-      putStrLn "Done."

src/Yore/Schedule.hs

@@ -0,0 +1,22 @@
+module Yore.Schedule (schedule) where
+
+import Control.Concurrent (forkIO, threadDelay)
+import Control.Monad (when)
+import Data.Functor (($>))
+import Data.Time (ZonedTime, getZonedTime, nominalDiffTimeToSeconds, secondsToNominalDiffTime)
+import Data.Time.Clock.POSIX (getPOSIXTime)
+
+schedule :: (ZonedTime -> Bool) -> IO a -> IO ()
+schedule shouldRunAt f = everyMinute $ \now -> when (shouldRunAt now) (f $> ())
+
+everyMinute :: (ZonedTime -> IO ()) -> IO ()
+everyMinute f = do
+  -- Use POSIX time to avoid having to handle leap seconds
+  now <- getPOSIXTime
+  let posixSeconds :: Int
+      posixSeconds = floor $ nominalDiffTimeToSeconds now
+      lastFullMinute = secondsToNominalDiffTime $ fromIntegral $ posixSeconds - posixSeconds `mod` 60
+      secondsSinceLastFullMinute = now - lastFullMinute
+  threadDelay $ ceiling $ (60 - secondsSinceLastFullMinute) * 1_000_000
+  _ <- forkIO $ f =<< getZonedTime
+  everyMinute f

src/Yore/Scrape.hs

@@ -112,7 +112,7 @@ showpdfRequest (y, m, d) =
     NoReqBody
     bsResponse
     ( formToQuery
-        [ ("cmd" :: Text, "showpdf")
+        [ ("cmd" :: Text, "showpdfjs")
         , ("year", y)
         , ("month", m)
         , ("day", d)

src/Yore/Servant.hs

@@ -0,0 +1,38 @@
+{-# LANGUAGE OverloadedRecordDot #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TypeFamilies #-}
+
+module Yore.Servant (GetSendfile, Sendfile (..), HTML) where
+
+import Network.HTTP.Media ((//), (/:))
+import Network.HTTP.Types (ResponseHeaders, status200)
+import Network.Wai (responseFile)
+import Servant (Accept (..), HasServer (..))
+import Servant.Server.Internal.Delayed (runAction)
+import Servant.Server.Internal.RouteResult (RouteResult (..))
+import Servant.Server.Internal.Router (Router' (..))
+
+-- | Servant route type that responds with a file using @sendfile@.
+data GetSendfile
+
+data Sendfile = Sendfile
+  { headers :: ResponseHeaders
+  -- ^ The headers to send along with the file, e.g. @content-type@ or cache information.
+  , path :: FilePath
+  -- ^ The file to respond with.
+  }
+  deriving (Show)
+
+instance HasServer GetSendfile context where
+  type ServerT GetSendfile m = m Sendfile
+
+  hoistServerWithContext _ _ nt = nt
+
+  route _ _ action = RawRouter $ \env request respond ->
+    runAction action env request respond $ \sendfile ->
+      Route $ responseFile status200 sendfile.headers sendfile.path Nothing
+
+data HTML
+
+instance Accept HTML where
+  contentType _ = "text" // "html" /: ("charset", "utf-8")

static/pdfjs-5.7.284-dist/LICENSE

@@ -0,0 +1,177 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
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+      and distribution as defined by Sections 1 through 9 of this document.
+
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+
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+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
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+
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+
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+   END OF TERMS AND CONDITIONS

static/pdfjs-5.7.284-dist/web/cmaps/CNS2-V.bcmap

@@ -0,0 +1,3 @@
+àRCopyright 1990-2009 Adobe Systems Incorporated.
+All rights reserved.
+See ./LICENSEáCNS2-H

static/pdfjs-5.7.284-dist/web/cmaps/ETenms-B5-H.bcmap

@@ -0,0 +1,3 @@
+àRCopyright 1990-2009 Adobe Systems Incorporated.
+All rights reserved.
+See ./LICENSEá	ETen-B5-H`
 ^

static/pdfjs-5.7.284-dist/web/cmaps/GB-H.bcmap

@@ -0,0 +1,4 @@
+àRCopyright 1990-2009 Adobe Systems Incorporated.
+All rights reserved.
+See ./LICENSE

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+�"]ˆh�"]‰F�"]Š$�"]‹�"]‹`�"]Œ>�"]��"]�z�"]ŽX�"]�6�"]��"]�r�"]‘P�"]’.�"]“�"]“j�"]”H�"]•&�"]–�"]–b�"]—@�"]˜�"]˜|�"]™Z�"]š8�"]›�"]›t�"]œR�"]�0�"]ž�"]žl�"]ŸJ�"] (�"]¡�"]¡d�"]¢B�"]£ �"X£~�']¤W�"]¥5�"]¦�"]¦q�"]§O�"]¨-�"]©�"]©i�"]ªG�"]«%�"]¬�"]¬a�"]­?�"]®�"]®{�"]¯Y�"]°7�"]±�"]±s�"]²Q�"]³/�"]´␍�"]´k�"]µI�"]¶'�"]·�"]·c�"]¸A�"]¹�"]¹}�"]º[�"]»9