{-# LANGUAGE DeriveAnyClass #-} {-# LANGUAGE DuplicateRecordFields #-} {-# LANGUAGE QuasiQuotes #-} {-# LANGUAGE ScopedTypeVariables #-} module WhatcdResolver where import Control.Category qualified as Cat import Control.Monad.Logger qualified as Logger import Control.Monad.Logger.CallStack import Control.Monad.Reader import Data.Aeson qualified as Json import Data.Aeson.BetterErrors qualified as Json import Data.Aeson.KeyMap qualified as KeyMap import Data.Error.Tree import Data.List qualified as List import Data.List.NonEmpty qualified as NonEmpty import Data.Map.Strict qualified as Map import Data.Pool (Pool) import Data.Pool qualified as Pool import Data.Scientific (Scientific) import Data.Text qualified as Text import Database.PostgreSQL.Simple (Binary (Binary), Only (..)) import Database.PostgreSQL.Simple qualified as Postgres import Database.PostgreSQL.Simple.SqlQQ (sql) import Database.PostgreSQL.Simple.Types (PGArray (PGArray)) import Database.Postgres.Temp qualified as TmpPg import FieldParser (FieldParser' (..)) import FieldParser qualified as Field import GHC.Records (HasField (..)) import IHP.HSX.QQ (hsx) import Json qualified import Json.Enc (Enc) import Json.Enc qualified as Enc import Label import Multipart2 qualified as Multipart import Network.HTTP.Conduit qualified as Http import Network.HTTP.Simple qualified as Http import Network.HTTP.Types import Network.HTTP.Types qualified as Http import Network.Wai qualified as Wai import Network.Wai.Handler.Warp qualified as Warp import OpenTelemetry.Trace qualified as Otel hiding (getTracer, inSpan) import OpenTelemetry.Trace qualified as OtelTrace import OpenTelemetry.Trace.Monad qualified as Otel import PossehlAnalyticsPrelude import Postgres.Decoder qualified as Dec import Postgres.MonadPostgres import Pretty import RunCommand (runCommandExpect0) import System.Directory qualified as Dir import System.Directory qualified as Xdg import System.Environment qualified as Env import System.FilePath (()) import System.IO qualified as IO import Text.Blaze.Html (Html) import Text.Blaze.Html.Renderer.Pretty qualified as Html.Pretty import Text.Blaze.Html.Renderer.Utf8 qualified as Html import Text.Blaze.Html5 qualified as Html import Tool (Tool, readTool, readTools) import UnliftIO main :: IO () main = runAppWith ( do -- todo: trace that to the init functions as well Otel.inSpan "whatcd-resolver main function" Otel.defaultSpanArguments $ do _ <- runTransaction migrate htmlUi ) <&> first showToError >>= expectIOError "could not start whatcd-resolver" htmlUi :: App () htmlUi = do let debug = True withRunInIO $ \runInIO -> Warp.run 9092 $ \req respond -> do let catchAppException act = try act >>= \case Right a -> pure a Left (AppException err) -> do runInIO (logError err) respond (Wai.responseLBS Http.status500 [] "") catchAppException $ do let renderHtml = if debug then Html.Pretty.renderHtml >>> stringToText >>> textToBytesUtf8 >>> toLazyBytes else Html.renderHtml let h act = do res <- runInIO act respond . Wai.responseLBS Http.ok200 [("Content-Type", "text/html")] . renderHtml $ res let mp parser = Multipart.parseMultipartOrThrow appThrowTree parser req let torrentIdMp = mp ( do label @"torrentId" <$> Multipart.field "torrent-id" ((Field.utf8 >>> Field.signedDecimal >>> Field.bounded @Int "int")) ) case req & Wai.pathInfo & Text.intercalate "/" of "" -> h mainHtml "snips/redacted/search" -> do h $ do dat <- mp ( do label @"searchstr" <$> Multipart.field "redacted-search" Cat.id ) snipsRedactedSearch dat "snips/redacted/torrentDataJson" -> h $ do dat <- torrentIdMp mkVal <$> (runTransaction $ getTorrentById dat) "snips/redacted/getTorrentFile" -> h $ do dat <- torrentIdMp runTransaction $ do inserted <- redactedGetTorrentFileAndInsert dat running <- lift @Transaction $ doTransmissionRequest' (transmissionRequestAddTorrent inserted) updateTransmissionTorrentHashById ( T2 (getLabel @"torrentHash" running) (getLabel @"torrentId" dat) ) pure $ everySecond "snips/transmission/getTorrentState" (Enc.object [("torrent-hash", Enc.text running.torrentHash)]) "Starting" -- TODO: this is bad duplication?? "snips/redacted/startTorrentFile" -> h $ do dat <- torrentIdMp runTransaction $ do file <- getTorrentFileById dat <&> annotate [fmt|No torrent file for torrentId "{dat.torrentId}"|] >>= orAppThrowTree running <- lift @Transaction $ doTransmissionRequest' (transmissionRequestAddTorrent file) updateTransmissionTorrentHashById ( T2 (getLabel @"torrentHash" running) (getLabel @"torrentId" dat) ) pure $ everySecond "snips/transmission/getTorrentState" (Enc.object [("torrent-hash", Enc.text running.torrentHash)]) "Starting" "snips/transmission/getTorrentState" -> h $ do dat <- mp $ label @"torrentHash" <$> Multipart.field "torrent-hash" Field.utf8 status <- doTransmissionRequest' ( transmissionRequestListOnlyTorrents ( T2 (label @"ids" [label @"torrentHash" dat.torrentHash]) (label @"fields" ["hashString"]) ) (Json.keyLabel @"torrentHash" "hashString" Json.asText) ) <&> List.find (\torrent -> torrent.torrentHash == dat.torrentHash) pure $ case status of Nothing -> [hsx|ERROR unknown|] Just _torrent -> [hsx|Running|] _ -> h mainHtml where everySecond :: Text -> Enc -> Html -> Html everySecond call extraData innerHtml = [hsx|
{innerHtml}
|] mainHtml = runTransaction $ do bestTorrentsTable <- getBestTorrentsTable transmissionTorrentsTable <- lift @Transaction getTransmissionTorrentsTable pure $ Html.docTypeHtml [hsx|
{bestTorrentsTable}
{transmissionTorrentsTable}
|] snipsRedactedSearch :: ( MonadLogger m, MonadIO m, MonadPostgres m, HasField "searchstr" r ByteString, MonadThrow m, MonadTransmission m ) => r -> m Html snipsRedactedSearch dat = do t <- redactedSearchAndInsert [ ("searchstr", dat.searchstr), ("releasetype", "album") ] runTransaction $ do t getBestTorrentsTable getBestTorrentsTable :: ( MonadIO m, MonadTransmission m, MonadThrow m, MonadLogger m, MonadPostgres m ) => Transaction m Html getBestTorrentsTable = do bestStale :: [TorrentData ()] <- getBestTorrents actual <- getAndUpdateTransmissionTorrentsStatus ( bestStale & mapMaybe ( \td -> case td.torrentStatus of InTransmission h -> Just h _ -> Nothing ) <&> (\t -> (getLabel @"torrentHash" t, t.transmissionInfo)) & Map.fromList ) let fresh = bestStale -- we have to update the status of every torrent that’s not in tranmission anymore -- TODO I feel like it’s easier (& more correct?) to just do the database request again … <&> ( \td -> case td.torrentStatus of InTransmission info -> case actual & Map.lookup (getLabel @"torrentHash" info) of -- TODO this is also pretty dumb, cause it assumes that we have the torrent file if it was in transmission before, -- which is an internal factum that is established in getBestTorrents (and might change later) Nothing -> td {torrentStatus = NotInTransmissionYet} Just transmissionInfo -> td {torrentStatus = InTransmission (T2 (getLabel @"torrentHash" info) (label @"transmissionInfo" transmissionInfo))} NotInTransmissionYet -> td {torrentStatus = NotInTransmissionYet} NoTorrentFileYet -> td {torrentStatus = NoTorrentFileYet} ) let localTorrent b = case b.torrentStatus of NoTorrentFileYet -> [hsx||] InTransmission info -> [hsx|{info.transmissionInfo.percentDone.unPercentage}% done|] NotInTransmissionYet -> [hsx||] let bestRows = fresh & foldMap ( \b -> do [hsx| {localTorrent b} {Html.toHtml @Int b.groupId} {Html.toHtml @Text b.torrentGroupJson.artist} {Html.toHtml @Text b.torrentGroupJson.groupName} {Html.toHtml @Int b.seedingWeight}
|] ) pure $ [hsx| {bestRows}
Local Group ID Artist Name Weight Torrent Torrent Group
|] -- | A value between (inclusive) 0% and (inclusive) 100%. Precise to 1% steps. newtype Percentage = Percentage {unPercentage :: Int} deriving stock (Show) -- | Parse a scientific into a Percentage scientificPercentage :: FieldParser' Error Scientific Percentage scientificPercentage = Field.boundedScientificRealFloat @Float >>> ( FieldParser $ \f -> if | f < 0 -> Left "percentage cannot be negative" | f > 1 -> Left "percentage cannot be over 100%" | otherwise -> Right $ Percentage $ ceiling (f * 100) ) -- | Fetch the current status from transmission, and remove the tranmission hash from our database -- iff it does not exist in transmission anymore getAndUpdateTransmissionTorrentsStatus :: ( MonadIO m, MonadTransmission m, MonadThrow m, MonadLogger m, MonadPostgres m ) => Map (Label "torrentHash" Text) () -> (Transaction m (Map (Label "torrentHash" Text) (Label "percentDone" Percentage))) getAndUpdateTransmissionTorrentsStatus knownTorrents = do let fields = ["hashString", "percentDone"] actualTorrents <- lift @Transaction $ doTransmissionRequest' ( transmissionRequestListOnlyTorrents ( T2 (label @"fields" fields) (label @"ids" (Map.keys knownTorrents)) ) $ do torrentHash <- Json.keyLabel @"torrentHash" "hashString" Json.asText percentDone <- Json.keyLabel @"percentDone" "percentDone" (Field.jsonParser $ Field.jsonNumber >>> scientificPercentage) pure (torrentHash, percentDone) ) <&> Map.fromList let toDelete = Map.difference knownTorrents actualTorrents execute [fmt| UPDATE redacted.torrents_json SET transmission_torrent_hash = NULL WHERE transmission_torrent_hash = ANY (?::text[]) |] $ Only (toDelete & Map.keys <&> (.torrentHash) & PGArray :: PGArray Text) pure actualTorrents getTransmissionTorrentsTable :: (MonadIO m, MonadTransmission m, MonadThrow m, MonadLogger m) => m Html getTransmissionTorrentsTable = do let fields = [ "hashString", "name", "percentDone", "percentComplete", "downloadDir", "files" ] doTransmissionRequest' ( transmissionRequestListAllTorrents fields $ do Json.asObject <&> KeyMap.toMapText ) <&> \resp -> toTable ( resp & List.sortOn (\m -> m & Map.lookup "percentDone" & fromMaybe (Json.Number 0)) <&> Map.toList -- TODO & List.take 100 ) -- | Render an arbitrary json value to HTML in a more-or-less reasonable fashion. mkVal :: Json.Value -> Html mkVal = \case Json.Number n -> Html.toHtml @Text $ showToText n Json.String s -> Html.toHtml @Text s Json.Bool True -> [hsx|true|] Json.Bool False -> [hsx|false|] Json.Null -> [hsx|null|] Json.Array arr -> arr & foldMap (\el -> Html.li $ mkVal el) & Html.ol Json.Object obj -> obj & KeyMap.toMapText & Map.toList & foldMap (\(k, v) -> Html.dt (Html.toHtml @Text k) <> Html.dd (mkVal v)) & Html.dl -- | Render a table-like structure of json values as an HTML table. toTable :: [[(Text, Json.Value)]] -> Html toTable xs = case xs & nonEmpty of Nothing -> [hsx|

No results.

|] Just xs' -> do let headers = xs' & NonEmpty.head <&> fst <&> (\h -> [hsx|{h}|]) & mconcat let vals = xs' & foldMap (Html.tr . foldMap (Html.td . mkVal . snd)) [hsx| {headers} {vals}
|] data TransmissionRequest = TransmissionRequest { method :: Text, arguments :: Map Text Enc, tag :: Maybe Int } deriving stock (Show) testTransmission :: (Show out) => (TransmissionRequest, Json.Parse Error out) -> IO (Either TmpPg.StartError ()) testTransmission req = runAppWith $ doTransmissionRequest transmissionConnectionConfig req >>= liftIO . printPretty transmissionConnectionConfig :: T2 "host" Text "port" Text transmissionConnectionConfig = (T2 (label @"host" "localhost") (label @"port" "9091")) transmissionRequestListAllTorrents :: (Monad m) => [Text] -> Json.ParseT e m out -> (TransmissionRequest, Json.ParseT e m [out]) transmissionRequestListAllTorrents fields parseTorrent = ( TransmissionRequest { method = "torrent-get", arguments = Map.fromList [ ("fields", Enc.list Enc.text fields) ], tag = Nothing }, Json.key "torrents" $ Json.eachInArray parseTorrent ) transmissionRequestListOnlyTorrents :: ( HasField "ids" r1 [(Label "torrentHash" Text)], HasField "fields" r1 [Text], Monad m ) => r1 -> Json.ParseT e m out -> (TransmissionRequest, Json.ParseT e m [out]) transmissionRequestListOnlyTorrents dat parseTorrent = ( TransmissionRequest { method = "torrent-get", arguments = Map.fromList [ ("ids", Enc.list (\i -> Enc.text i.torrentHash) dat.ids), ("fields", Enc.list Enc.text dat.fields) ], tag = Nothing }, Json.key "torrents" $ Json.eachInArray parseTorrent ) transmissionRequestAddTorrent :: (HasField "torrentFile" r ByteString, Monad m) => r -> ( TransmissionRequest, Json.ParseT err m (T2 "torrentHash" Text "torrentName" Text) ) transmissionRequestAddTorrent dat = ( TransmissionRequest { method = "torrent-add", arguments = Map.fromList [ ("metainfo", Enc.base64Bytes dat.torrentFile), ("paused", Enc.bool False) ], tag = Nothing }, do let p method = Json.key method $ do hash <- Json.keyLabel @"torrentHash" "hashString" Json.asText name <- Json.keyLabel @"torrentName" "name" Json.asText pure $ T2 hash name p "torrent-duplicate" Json.<|> p "torrent-added" ) data TransmissionResponse output = TransmissionResponse { result :: TransmissionResponseStatus, arguments :: Maybe output, tag :: Maybe Int } deriving stock (Show) data TransmissionResponseStatus = TransmissionResponseSuccess | TransmissionResponseFailure Text deriving stock (Show) doTransmissionRequest' :: ( MonadIO m, MonadTransmission m, MonadThrow m, MonadLogger m ) => (TransmissionRequest, Json.Parse Error output) -> m output doTransmissionRequest' req = do resp <- doTransmissionRequest transmissionConnectionConfig req case resp.result of TransmissionResponseFailure err -> appThrowTree (nestedError "Transmission RPC error" $ singleError $ newError err) TransmissionResponseSuccess -> case resp.arguments of Nothing -> appThrowTree "Transmission RPC error: No `arguments` field in response" Just out -> pure out -- | Contact the transmission RPC, and do the CSRF protection dance. -- -- Spec: https://github.com/transmission/transmission/blob/main/docs/rpc-spec.md doTransmissionRequest :: ( MonadIO m, MonadTransmission m, HasField "host" t1 Text, HasField "port" t1 Text, MonadThrow m, MonadLogger m ) => t1 -> (TransmissionRequest, Json.Parse Error output) -> m (TransmissionResponse output) doTransmissionRequest dat (req, parser) = do sessionId <- getTransmissionId let body = Enc.object ( [ ("method", req.method & Enc.text), ("arguments", Enc.map id req.arguments) ] <> (req.tag & maybe [] (\t -> [("tag", t & Enc.int)])) ) logDebug [fmt|transmission request: {Pretty.showPrettyJsonEncoding body.unEnc}|] let httpReq = [fmt|http://{dat.host}:{dat.port}/transmission/rpc|] & Http.setRequestMethod "POST" & Http.setRequestBodyLBS (Enc.encToBytesUtf8Lazy body) & (sessionId & maybe id (Http.setRequestHeader "X-Transmission-Session-Id" . (: []))) resp <- Http.httpBS httpReq -- Implement the CSRF protection thingy case resp & Http.getResponseStatus & (.statusCode) of 409 -> do tid <- resp & Http.getResponseHeader "X-Transmission-Session-Id" & nonEmpty & annotate [fmt|Missing "X-Transmission-Session-Id" header in 409 response: {showPretty resp}|] & unwrapIOError & liftIO <&> NonEmpty.head setTransmissionId tid doTransmissionRequest dat (req, parser) 200 -> resp & Http.getResponseBody & Json.parseStrict ( Json.mapError singleError $ do result <- Json.key "result" Json.asText <&> \case "success" -> TransmissionResponseSuccess err -> TransmissionResponseFailure err arguments <- Json.keyMay "arguments" parser tag <- Json.keyMay "tag" (Field.jsonParser (Field.jsonNumber >>> Field.boundedScientificIntegral "tag too long")) pure TransmissionResponse {..} ) & first (Json.parseErrorTree "Cannot parse transmission RPC response") & \case Right a -> pure a Left err -> do case Json.eitherDecodeStrict' @Json.Value (resp & Http.getResponseBody) of Left _err -> pure () Right val -> logInfo [fmt|failing transmission response: {showPrettyJson val}|] appThrowTree err _ -> liftIO $ unwrapIOError $ Left [fmt|Non-200 response: {showPretty resp}|] redactedSearch :: (MonadLogger m, MonadIO m, MonadThrow m) => [(ByteString, ByteString)] -> Json.Parse ErrorTree a -> m a redactedSearch advanced = redactedApiRequestJson ( T2 (label @"action" "browse") (label @"actionArgs" ((advanced <&> second Just))) ) redactedGetTorrentFile :: ( MonadLogger m, MonadIO m, MonadThrow m, HasField "torrentId" dat Int ) => dat -> m ByteString redactedGetTorrentFile dat = redactedApiRequest ( T2 (label @"action" "download") ( label @"actionArgs" [ ("id", Just (dat.torrentId & showToText @Int & textToBytesUtf8)) -- try using tokens as long as we have them (TODO: what if there’s no tokens left? -- ANSWER: it breaks: -- responseBody = "{\"status\":\"failure\",\"error\":\"You do not have any freeleech tokens left. Please use the regular DL link.\"}", -- ("usetoken", Just "1") ] ) ) -- fix -- ( \io -> do -- logInfo "delay" -- liftIO $ threadDelay 10_000_000 -- io -- ) exampleSearch :: (MonadThrow m, MonadIO m, MonadLogger m, MonadPostgres m) => m (Transaction m ()) exampleSearch = do t1 <- redactedSearchAndInsert [ ("searchstr", "cherish"), ("artistname", "kirinji"), -- ("year", "1982"), -- ("format", "MP3"), -- ("releasetype", "album"), ("order_by", "year") ] t3 <- redactedSearchAndInsert [ ("searchstr", "mouss et hakim"), ("artistname", "mouss et hakim"), -- ("year", "1982"), -- ("format", "MP3"), -- ("releasetype", "album"), ("order_by", "year") ] t2 <- redactedSearchAndInsert [ ("searchstr", "thriller"), ("artistname", "michael jackson"), -- ("year", "1982"), -- ("format", "MP3"), -- ("releasetype", "album"), ("order_by", "year") ] pure (t1 >> t2 >> t3) -- | Do the search, return a transaction that inserts all results from all pages of the search. redactedSearchAndInsert :: forall m. ( MonadLogger m, MonadIO m, MonadPostgres m, MonadThrow m ) => [(ByteString, ByteString)] -> m (Transaction m ()) redactedSearchAndInsert extraArguments = do logInfo [fmt|Doing redacted search with arguments: {showPretty extraArguments}|] -- The first search returns the amount of pages, so we use that to query all results piece by piece. firstPage <- go Nothing let remainingPages = firstPage.pages - 1 logInfo [fmt|Got the first page, found {remainingPages} more pages|] let otherPagesNum = [(2 :: Natural) .. remainingPages] otherPages <- traverse go (Just <$> otherPagesNum) pure $ (firstPage : otherPages) & concatMap (.tourGroups) & insertTourGroupsAndTorrents where go mpage = redactedSearch ( extraArguments -- pass the page (for every search but the first one) <> ifExists (mpage <&> (\page -> [("page", (page :: Natural) & showToText & textToBytesUtf8)])) ) ( do status <- Json.key "status" Json.asText when (status /= "success") $ do Json.throwCustomError [fmt|Status was not "success", but {status}|] Json.key "response" $ do pages <- Json.key "pages" (Field.jsonParser (Field.mapError singleError $ Field.jsonNumber >>> Field.boundedScientificIntegral @Int "not an Integer" >>> Field.integralToNatural)) Json.key "results" $ do tourGroups <- label @"tourGroups" <$> ( Json.eachInArray $ do groupId <- Json.keyLabel @"groupId" "groupId" (Json.asIntegral @_ @Int) groupName <- Json.keyLabel @"groupName" "groupName" Json.asText fullJsonResult <- label @"fullJsonResult" <$> ( Json.asObject -- remove torrents cause they are inserted separately below <&> KeyMap.filterWithKey (\k _ -> k /= "torrents") <&> Json.Object ) let tourGroup = T3 groupId groupName fullJsonResult torrents <- Json.keyLabel @"torrents" "torrents" $ Json.eachInArray $ do torrentId <- Json.keyLabel @"torrentId" "torrentId" (Json.asIntegral @_ @Int) fullJsonResultT <- label @"fullJsonResult" <$> Json.asValue pure $ T2 torrentId fullJsonResultT pure (T2 (label @"tourGroup" tourGroup) torrents) ) pure ( T2 (label @"pages" pages) tourGroups ) ) insertTourGroupsAndTorrents :: [ T2 "tourGroup" (T3 "groupId" Int "groupName" Text "fullJsonResult" Json.Value) "torrents" [T2 "torrentId" Int "fullJsonResult" Json.Value] ] -> Transaction m () insertTourGroupsAndTorrents dat = do let tourGroups = dat <&> (.tourGroup) let torrents = dat <&> (.torrents) insertTourGroups tourGroups >>= ( \res -> insertTorrents $ zipT2 $ T2 (label @"torrentGroupIdPg" $ res <&> (.tourGroupIdPg)) (label @"torrents" torrents) ) insertTourGroups :: [ T3 "groupId" Int "groupName" Text "fullJsonResult" Json.Value ] -> Transaction m [Label "tourGroupIdPg" Int] insertTourGroups dats = do let groupNames = [ [fmt|{dat.groupId}: {dat.groupName}|] | dat <- dats ] logInfo [fmt|Inserting tour groups for {showPretty groupNames}|] _ <- execute [fmt| DELETE FROM redacted.torrent_groups WHERE group_id = ANY (?::integer[]) |] (Only $ (dats <&> (.groupId) & PGArray :: PGArray Int)) executeManyReturningWith [fmt| INSERT INTO redacted.torrent_groups ( group_id, group_name, full_json_result ) VALUES ( ?, ? , ? ) ON CONFLICT (group_id) DO UPDATE SET group_id = excluded.group_id, group_name = excluded.group_name, full_json_result = excluded.full_json_result RETURNING (id) |] ( dats <&> \dat -> ( dat.groupId, dat.groupName, dat.fullJsonResult ) ) (label @"tourGroupIdPg" <$> Dec.fromField @Int) insertTorrents :: [ T2 "torrentGroupIdPg" Int "torrents" [T2 "torrentId" Int "fullJsonResult" Json.Value] ] -> Transaction m () insertTorrents dats = do _ <- execute [sql| DELETE FROM redacted.torrents_json WHERE torrent_id = ANY (?::integer[]) |] ( Only $ PGArray [ torrent.torrentId | dat <- dats, torrent <- dat.torrents ] ) execute [sql| INSERT INTO redacted.torrents_json ( torrent_group , torrent_id , full_json_result) SELECT * FROM UNNEST( ?::integer[] , ?::integer[] , ?::jsonb[] ) AS inputs( torrent_group , torrent_id , full_json_result) |] ( [ ( dat.torrentGroupIdPg :: Int, group.torrentId :: Int, group.fullJsonResult :: Json.Value ) | dat <- dats, group <- dat.torrents ] & unzip3PGArray ) pure () unzip3PGArray :: [(a1, a2, a3)] -> (PGArray a1, PGArray a2, PGArray a3) unzip3PGArray xs = xs & unzip3 & \(a, b, c) -> (PGArray a, PGArray b, PGArray c) redactedGetTorrentFileAndInsert :: ( HasField "torrentId" r Int, MonadPostgres m, MonadThrow m, MonadIO m, MonadLogger m ) => r -> Transaction m (Label "torrentFile" ByteString) redactedGetTorrentFileAndInsert dat = do bytes <- redactedGetTorrentFile dat execute [sql| UPDATE redacted.torrents_json SET torrent_file = ?::bytea WHERE torrent_id = ?::integer |] ( (Binary bytes :: Binary ByteString), dat.torrentId ) >>= assertOneUpdated "redactedGetTorrentFileAndInsert" >>= \() -> pure (label @"torrentFile" bytes) getTorrentFileById :: ( MonadPostgres m, HasField "torrentId" r Int, MonadThrow m ) => r -> Transaction m (Maybe (Label "torrentFile" ByteString)) getTorrentFileById dat = do queryWith [sql| SELECT torrent_file FROM redacted.torrents WHERE torrent_id = ?::integer |] (Only $ (dat.torrentId :: Int)) (fmap @Maybe (label @"torrentFile") <$> Dec.byteaMay) >>= ensureSingleRow updateTransmissionTorrentHashById :: ( MonadPostgres m, HasField "torrentId" r Int, HasField "torrentHash" r Text ) => r -> Transaction m (Label "numberOfRowsAffected" Natural) updateTransmissionTorrentHashById dat = do execute [sql| UPDATE redacted.torrents_json SET transmission_torrent_hash = ?::text WHERE torrent_id = ?::integer |] ( dat.torrentHash :: Text, dat.torrentId :: Int ) assertOneUpdated :: (HasField "numberOfRowsAffected" r Natural, MonadThrow m) => Text -> r -> m () assertOneUpdated name x = case x.numberOfRowsAffected of 1 -> pure () n -> appThrowTree ([fmt|{name :: Text}: Expected to update exactly one row, but updated {n :: Natural} row(s)|]) migrate :: ( MonadPostgres m, MonadUnliftIO m, Otel.MonadTracer m ) => Transaction m (Label "numberOfRowsAffected" Natural) migrate = inSpanT "Database Migration" $ do execute_ [sql| CREATE SCHEMA IF NOT EXISTS redacted; CREATE TABLE IF NOT EXISTS redacted.torrent_groups ( id SERIAL PRIMARY KEY, group_id INTEGER, group_name TEXT, full_json_result JSONB, UNIQUE(group_id) ); CREATE TABLE IF NOT EXISTS redacted.torrents_json ( id SERIAL PRIMARY KEY, torrent_id INTEGER, torrent_group SERIAL NOT NULL REFERENCES redacted.torrent_groups(id) ON DELETE CASCADE, full_json_result JSONB, UNIQUE(torrent_id) ); ALTER TABLE redacted.torrents_json ADD COLUMN IF NOT EXISTS torrent_file bytea NULL; ALTER TABLE redacted.torrents_json ADD COLUMN IF NOT EXISTS transmission_torrent_hash text NULL; -- inflect out values of the full json CREATE OR REPLACE VIEW redacted.torrents AS SELECT t.id, t.torrent_id, t.torrent_group, -- the seeding weight is used to find the best torrent in a group. ( ((full_json_result->'seeders')::integer*3 + (full_json_result->'snatches')::integer ) -- prefer remasters by multiplying them with 3 * (CASE WHEN full_json_result->>'remasterTitle' ILIKE '%remaster%' THEN 3 ELSE 1 END) ) AS seeding_weight, t.full_json_result, t.torrent_file, t.transmission_torrent_hash FROM redacted.torrents_json t; CREATE INDEX IF NOT EXISTS torrents_json_seeding ON redacted.torrents_json(((full_json_result->'seeding')::integer)); CREATE INDEX IF NOT EXISTS torrents_json_snatches ON redacted.torrents_json(((full_json_result->'snatches')::integer)); |] data TorrentData transmissionInfo = TorrentData { groupId :: Int, torrentId :: Int, seedingWeight :: Int, torrentJson :: Json.Value, torrentGroupJson :: T2 "artist" Text "groupName" Text, torrentStatus :: TorrentStatus transmissionInfo } data TorrentStatus transmissionInfo = NoTorrentFileYet | NotInTransmissionYet | InTransmission (T2 "torrentHash" Text "transmissionInfo" transmissionInfo) getTorrentById :: (MonadPostgres m, HasField "torrentId" r Int, MonadThrow m) => r -> Transaction m Json.Value getTorrentById dat = do queryWith [sql| SELECT full_json_result FROM redacted.torrents WHERE torrent_id = ?::integer |] (getLabel @"torrentId" dat) (Dec.json Json.asValue) >>= ensureSingleRow -- | Find the best torrent for each torrent group (based on the seeding_weight) getBestTorrents :: (MonadPostgres m) => Transaction m [TorrentData ()] getBestTorrents = do queryWith [sql| SELECT * FROM ( SELECT DISTINCT ON (group_id) tg.group_id, t.torrent_id, seeding_weight, t.full_json_result AS torrent_json, tg.full_json_result AS torrent_group_json, t.torrent_file IS NOT NULL, t.transmission_torrent_hash FROM redacted.torrents t JOIN redacted.torrent_groups tg ON tg.id = t.torrent_group ORDER BY group_id, seeding_weight DESC ) as _ ORDER BY seeding_weight DESC |] () ( do groupId <- Dec.fromField @Int torrentId <- Dec.fromField @Int seedingWeight <- Dec.fromField @Int torrentJson <- Dec.json Json.asValue torrentGroupJson <- ( Dec.json $ do artist <- Json.keyLabel @"artist" "artist" Json.asText groupName <- Json.keyLabel @"groupName" "groupName" Json.asText pure $ T2 artist groupName ) hasTorrentFile <- Dec.fromField @Bool transmissionTorrentHash <- Dec.fromField @(Maybe Text) pure $ TorrentData { torrentStatus = if | not hasTorrentFile -> NoTorrentFileYet | Nothing <- transmissionTorrentHash -> NotInTransmissionYet | Just hash <- transmissionTorrentHash -> InTransmission $ T2 (label @"torrentHash" hash) (label @"transmissionInfo" ()), .. } ) inSpan :: (MonadUnliftIO m, Otel.MonadTracer m) => Text -> m a -> m a inSpan name = Otel.inSpan name Otel.defaultSpanArguments inSpanT :: (Otel.MonadTracer m, MonadUnliftIO m) => Text -> Transaction m b -> Transaction m b inSpanT name transaction = do tracer <- lift @Transaction $ Otel.getTracer -- I don’t want to implement MonadTracer for Transaction, -- so I’m unlifting it via IO, that should work :P withRunInIO $ \runInIO -> do OtelTrace.inSpan tracer name Otel.defaultSpanArguments (runInIO transaction) hush :: Either a1 a2 -> Maybe a2 hush (Left _) = Nothing hush (Right a) = Just a zipT2 :: forall l1 l2 t1 t2. ( HasField l1 (T2 l1 [t1] l2 [t2]) [t1], HasField l2 (T2 l1 [t1] l2 [t2]) [t2] ) => T2 l1 [t1] l2 [t2] -> [T2 l1 t1 l2 t2] zipT2 xs = zipWith (\t1 t2 -> T2 (label @l1 t1) (label @l2 t2)) (getField @l1 xs) (getField @l2 xs) unzipT2 :: forall l1 t1 l2 t2. [T2 l1 t1 l2 t2] -> T2 l1 [t1] l2 [t2] unzipT2 xs = xs <&> toTup & unzip & fromTup where toTup :: forall a b. T2 a t1 b t2 -> (t1, t2) toTup (T2 a b) = (getField @a a, getField @b b) fromTup :: (a, b) -> T2 l1 a l2 b fromTup (t1, t2) = T2 (label @l1 t1) (label @l2 t2) unzipT3 :: forall l1 t1 l2 t2 l3 t3. [T3 l1 t1 l2 t2 l3 t3] -> T3 l1 [t1] l2 [t2] l3 [t3] unzipT3 xs = xs <&> toTup & unzip3 & fromTup where toTup :: forall a b c. T3 a t1 b t2 c t3 -> (t1, t2, t3) toTup (T3 a b c) = (getField @a a, getField @b b, getField @c c) fromTup :: (a, b, c) -> T3 l1 a l2 b l3 c fromTup (t1, t2, t3) = T3 (label @l1 t1) (label @l2 t2) (label @l3 t3) -- | Do a request to the redacted API. If you know what that is, you know how to find the API docs. redactedApiRequest :: ( MonadThrow m, MonadIO m, MonadLogger m, HasField "action" p ByteString, HasField "actionArgs" p [(ByteString, Maybe ByteString)] ) => p -> m ByteString redactedApiRequest dat = do authKey <- runCommandExpect0 "pass" ["internet/redacted/api-keys/whatcd-resolver"] let req = [fmt|https://redacted.ch/ajax.php|] & Http.setRequestMethod "GET" & Http.setQueryString (("action", Just dat.action) : dat.actionArgs) & Http.setRequestHeader "Authorization" [authKey] Http.httpBS req >>= assertM ( \resp -> case resp & Http.responseStatus & (.statusCode) of 200 -> Right $ resp & Http.responseBody _ -> Left [fmt|Redacted returned an non-200 error code: {resp & showPretty}|] ) redactedApiRequestJson :: ( MonadThrow m, MonadIO m, MonadLogger m, HasField "action" p ByteString, HasField "actionArgs" p [(ByteString, Maybe ByteString)] ) => p -> Json.Parse ErrorTree a -> m a redactedApiRequestJson dat parse = do redactedApiRequest dat >>= ( Json.parseStrict parse >>> first (Json.parseErrorTree "could not parse redacted response") >>> assertM id ) assertM :: (MonadThrow f) => (t -> Either ErrorTree a) -> t -> f a assertM f v = case f v of Right a -> pure a Left err -> appThrowTree err runAppWith :: AppT IO a -> IO (Either TmpPg.StartError a) runAppWith appT = withTracer $ \tracer -> withDb $ \db -> do pgFormat <- readTools (label @"toolsEnvVar" "WHATCD_RESOLVER_TOOLS") (readTool "pg_format") let config = label @"logDatabaseQueries" LogDatabaseQueries pgConnPool <- Pool.createPool (Postgres.connectPostgreSQL (db & TmpPg.toConnectionString)) Postgres.close {- number of stripes -} 5 {- unusedResourceOpenTime -} 10 {- max resources per stripe -} 10 transmissionSessionId <- newEmptyMVar let newAppT = do logInfo [fmt|Running with config: {showPretty config}|] logInfo [fmt|Connected to database at {db & TmpPg.toDataDirectory} on socket {db & TmpPg.toConnectionString}|] appT runReaderT newAppT.unAppT Context {..} withTracer :: (Otel.Tracer -> IO c) -> IO c withTracer f = do setDefaultEnv "OTEL_SERVICE_NAME" "whatcd-resolver" bracket -- Install the SDK, pulling configuration from the environment Otel.initializeGlobalTracerProvider -- Ensure that any spans that haven't been exported yet are flushed Otel.shutdownTracerProvider -- Get a tracer so you can create spans (\tracerProvider -> f $ Otel.makeTracer tracerProvider "whatcd-resolver" Otel.tracerOptions) setDefaultEnv :: String -> String -> IO () setDefaultEnv envName defaultValue = do Env.lookupEnv envName >>= \case Just _env -> pure () Nothing -> Env.setEnv envName defaultValue withDb :: (TmpPg.DB -> IO a) -> IO (Either TmpPg.StartError a) withDb act = do dataDir <- Xdg.getXdgDirectory Xdg.XdgData "whatcd-resolver" let databaseDir = dataDir "database" let socketDir = dataDir "database-socket" Dir.createDirectoryIfMissing True socketDir initDbConfig <- Dir.doesDirectoryExist databaseDir >>= \case True -> pure TmpPg.Zlich False -> do putStderrLn [fmt|Database does not exist yet, creating in "{databaseDir}"|] Dir.createDirectoryIfMissing True databaseDir pure TmpPg.DontCare let cfg = mempty { TmpPg.dataDirectory = TmpPg.Permanent (databaseDir), TmpPg.socketDirectory = TmpPg.Permanent socketDir, TmpPg.port = pure $ Just 5431, TmpPg.initDbConfig } TmpPg.withConfig cfg $ \db -> do -- print [fmt|data dir: {db & TmpPg.toDataDirectory}|] -- print [fmt|conn string: {db & TmpPg.toConnectionString}|] act db data Context = Context { config :: Label "logDatabaseQueries" DebugLogDatabaseQueries, tracer :: Otel.Tracer, pgFormat :: Tool, pgConnPool :: Pool Postgres.Connection, transmissionSessionId :: MVar ByteString } newtype AppT m a = AppT {unAppT :: ReaderT Context m a} deriving newtype (Functor, Applicative, Monad, MonadIO, MonadUnliftIO, MonadThrow) type App a = AppT IO a data AppException = AppException Text deriving stock (Show) deriving anyclass (Exception) appThrowTree :: (MonadThrow m) => ErrorTree -> m a appThrowTree exc = throwM $ AppException $ prettyErrorTree exc orAppThrowTree :: (MonadThrow m) => Either ErrorTree a -> m a orAppThrowTree = \case Left err -> appThrowTree err Right a -> pure a instance (MonadIO m) => MonadLogger (AppT m) where monadLoggerLog loc src lvl msg = liftIO $ Logger.defaultOutput IO.stderr loc src lvl (Logger.toLogStr msg) instance (Monad m) => Otel.MonadTracer (AppT m) where getTracer = AppT $ asks (.tracer) class MonadTransmission m where getTransmissionId :: m (Maybe ByteString) setTransmissionId :: ByteString -> m () instance (MonadIO m) => MonadTransmission (AppT m) where getTransmissionId = AppT (asks (.transmissionSessionId)) >>= tryTakeMVar setTransmissionId t = do var <- AppT $ asks (.transmissionSessionId) putMVar var t instance (MonadThrow m, MonadUnliftIO m) => MonadPostgres (AppT m) where execute = executeImpl (AppT ask) (AppT $ asks (.config.logDatabaseQueries)) execute_ = executeImpl_ (AppT ask) (AppT $ asks (.config.logDatabaseQueries)) executeMany = executeManyImpl (AppT ask) (AppT $ asks (.config.logDatabaseQueries)) executeManyReturningWith = executeManyReturningWithImpl (AppT ask) (AppT $ asks (.config.logDatabaseQueries)) queryWith = queryWithImpl (AppT ask) (AppT $ asks (.config.logDatabaseQueries)) queryWith_ = queryWithImpl_ (AppT ask) foldRows = foldRowsImpl (AppT ask) runTransaction = runPGTransaction runPGTransaction :: (MonadUnliftIO m) => Transaction (AppT m) a -> AppT m a runPGTransaction (Transaction transaction) = do pool <- AppT ask <&> (.pgConnPool) withRunInIO $ \unliftIO -> withPGTransaction pool $ \conn -> do unliftIO $ runReaderT transaction conn data HasQueryParams param = HasNoParams | HasSingleParam param | HasMultiParams [param]