{-# LANGUAGE QuasiQuotes #-} module WhatcdResolver where import AppT import Control.Category qualified as Cat import Control.Monad.Catch.Pure (runCatch) 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.HashMap.Strict qualified as HashMap import Data.List qualified as List import Data.Map.Strict qualified as Map import Data.Pool qualified as Pool import Data.Text qualified as Text 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, FieldParser' (..)) import FieldParser qualified as Field import Html qualified import IHP.HSX.QQ (hsx) import Json qualified import Json.Enc (Enc) import Json.Enc qualified as Enc import JsonLd import Label import Multipart2 qualified as Multipart import MyPrelude import Network.HTTP.Client.Conduit qualified as Http import Network.HTTP.Simple qualified as Http import Network.HTTP.Types import Network.HTTP.Types qualified as Http import Network.URI (URI) import Network.URI qualified import Network.URI qualified as URI import Network.Wai (ResponseReceived) import Network.Wai qualified as Wai import Network.Wai.Handler.Warp qualified as Warp import Network.Wai.Parse qualified as Wai import OpenTelemetry.Attributes qualified as Otel import OpenTelemetry.Trace qualified as Otel hiding (getTracer, inSpan, inSpan') import OpenTelemetry.Trace.Monad qualified as Otel import Parse (Parse) import Parse qualified import Postgres.Decoder qualified as Dec import Postgres.MonadPostgres import Pretty import Redacted import System.Directory qualified as Dir import System.Directory qualified as Xdg import System.Environment qualified as Env import System.FilePath (()) import Text.Blaze.Html (Html) import Text.Blaze.Html.Renderer.Utf8 qualified as Html import Text.Blaze.Html5 qualified as Html import Tool (readTool, readTools) import Transmission import UnliftIO hiding (Handler) import Prelude hiding (span) 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 :: AppT IO () htmlUi = do let debug = True uniqueRunId <- runTransaction $ querySingleRowWith [sql| SELECT gen_random_uuid()::text |] () (Dec.fromField @Text) withRunInIO $ \runInIO -> Warp.run 9093 $ \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 mp span parser = Multipart.parseMultipartOrThrow (appThrowTree span) parser req let torrentIdMp span = mp span ( do label @"torrentId" <$> Multipart.field "torrent-id" ((Field.utf8 >>> Field.signedDecimal >>> Field.bounded @Int "int")) ) let parseQueryArgs span parser = Parse.runParse "Unable to find the right request query arguments" (lmap Wai.queryString parser) req & assertM span id let parseQueryArgsNewSpan spanName parser = Parse.runParse "Unable to find the right request query arguments" (lmap Wai.queryString parser) req & assertMNewSpan spanName id let handlers :: Handlers (AppT IO) handlers respond = Map.fromList [ ("", respond.h (mainHtml uniqueRunId)), ( "snips/redacted/search", respond.h $ \span -> do dat <- mp span ( do label @"searchstr" <$> Multipart.field "redacted-search" Cat.id ) snipsRedactedSearch dat ), ( "snips/redacted/torrentDataJson", respond.h $ \span -> do dat <- torrentIdMp span Html.mkVal <$> (runTransaction $ getTorrentById dat) ), ( "snips/redacted/getTorrentFile", respond.h $ \span -> do dat <- torrentIdMp span 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", respond.h $ \span -> do dat <- torrentIdMp span runTransaction $ do file <- getTorrentFileById dat <&> annotate [fmt|No torrent file for torrentId "{dat.torrentId}"|] >>= orAppThrowTree span 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", respond.h $ \span -> do dat <- mp span $ 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|] ), ( "snips/jsonld/render", respond.h $ \span -> do qry <- parseQueryArgs span ( label @"target" <$> ( (singleQueryArgument "target" Field.utf8 >>> textToURI) & Parse.andParse uriToHttpClientRequest ) ) jsonld <- httpGetJsonLd (qry.target) pure $ renderJsonld jsonld ), ( "autorefresh", respond.plain $ do qry <- parseQueryArgsNewSpan "Autorefresh Query Parse" ( label @"hasItBeenRestarted" <$> singleQueryArgument "hasItBeenRestarted" Field.utf8 ) pure $ Wai.responseLBS Http.ok200 ( [("Content-Type", "text/html")] <> if uniqueRunId /= qry.hasItBeenRestarted then -- cause the client side to refresh [("HX-Refresh", "true")] else [] ) "" ) ] runInIO $ runHandlers debug (\respond -> respond.h $ (mainHtml uniqueRunId)) handlers req respond where everySecond :: Text -> Enc -> Html -> Html everySecond call extraData innerHtml = [hsx|
{innerHtml}
|] mainHtml :: Text -> Otel.Span -> AppT IO Html mainHtml uniqueRunId _span = runTransaction $ do jsonld <- httpGetJsonLd ( URI.parseURI "https://musicbrainz.org/work/92000fd4-d304-406d-aeb4-6bdbeed318ec" & annotate "not an URI" & unwrapError, "https://musicbrainz.org/work/92000fd4-d304-406d-aeb4-6bdbeed318ec" ) <&> renderJsonld bestTorrentsTable <- getBestTorrentsTable -- transmissionTorrentsTable <- lift @Transaction getTransmissionTorrentsTable pure $ Html.docTypeHtml [hsx| whatcd-resolver {jsonld}
Search running!
{bestTorrentsTable}
|] type Handlers m = HandlerResponses m -> Map Text (m ResponseReceived) type HandlerResponses m = T2 "h" ((Otel.Span -> m Html) -> m ResponseReceived) "plain" (m Wai.Response -> m ResponseReceived) runHandlers :: (MonadOtel m) => Bool -> (HandlerResponses m -> m ResponseReceived) -> (HandlerResponses m -> Map Text (m ResponseReceived)) -> Wai.Request -> (Wai.Response -> IO ResponseReceived) -> m ResponseReceived runHandlers debug defaultHandler handlers req respond = withRunInIO $ \runInIO -> do let hh route act = Otel.inSpan' [fmt|Route {route}|] ( Otel.defaultSpanArguments { Otel.attributes = HashMap.fromList [ ("server.path", Otel.toAttribute @Text route) ] } ) ( \span -> do res <- act span liftIO $ respond . Wai.responseLBS Http.ok200 ([("Content-Type", "text/html")] <> res.extraHeaders) . Html.renderHtml $ res.html ) let h route act = hh route (\span -> act span <&> (\html -> T2 (label @"html" html) (label @"extraHeaders" []))) let path = [fmt|/{req & Wai.pathInfo & Text.intercalate "/"}|] let handlerResponses = ( T2 (label @"h" (h path)) (label @"plain" (\m -> liftIO $ runInIO m >>= respond)) ) let handler = (handlers handlerResponses) & Map.lookup path & fromMaybe (defaultHandler handlerResponses) runInIO handler singleQueryArgument :: Text -> FieldParser ByteString to -> Parse Http.Query to singleQueryArgument field inner = Parse.mkParsePushContext field ( \(ctx, qry) -> case qry & mapMaybe ( \(k, v) -> if k == (field & textToBytesUtf8) then Just v else Nothing ) of [] -> Left [fmt|No such query argument "{field}", at {ctx & Parse.showContext}|] [Nothing] -> Left [fmt|Expected one query argument with a value, but "{field}" was a query flag|] [Just one] -> Right one more -> Left [fmt|More than one value for query argument "{field}": {show more}, at {ctx & Parse.showContext}|] ) >>> Parse.fieldParser inner -- | Make sure we can parse the given Text into an URI. textToURI :: Parse Text URI textToURI = Parse.fieldParser ( FieldParser $ \text -> text & textToString & Network.URI.parseURI & annotate [fmt|Cannot parse this as a URL: "{text}"|] ) -- | Make sure we can parse the given URI into a Request. -- -- This tries to work around the horrible, horrible interface in Http.Client. uriToHttpClientRequest :: Parse URI Http.Request uriToHttpClientRequest = Parse.mkParseNoContext ( \url -> (url & Http.requestFromURI) & runCatch & first (checkException @Http.HttpException) & \case Left (Right (Http.InvalidUrlException urlText reason)) -> Left [fmt|Unable to set the url "{urlText}" as request URL, reason: {reason}|] Left (Right exc@(Http.HttpExceptionRequest _ _)) -> Left [fmt|Weird! Should not get a HttpExceptionRequest when parsing an URL (bad library design), was {exc & displayException}|] Left (Left someExc) -> Left [fmt|Weird! Should not get anyhting but a HttpException when parsing an URL (bad library design), was {someExc & displayException}|] Right req -> pure req ) checkException :: (Exception b) => SomeException -> Either SomeException b checkException some = case fromException some of Nothing -> Left some Just e -> Right e snipsRedactedSearch :: ( MonadLogger m, MonadPostgres m, HasField "searchstr" r ByteString, MonadThrow m, MonadTransmission m, MonadOtel m ) => r -> m Html snipsRedactedSearch dat = do t <- redactedSearchAndInsert [ ("searchstr", dat.searchstr), ("releasetype", "album") ] runTransaction $ do t getBestTorrentsTable getBestTorrentsTable :: ( MonadTransmission m, MonadThrow m, MonadLogger m, MonadPostgres m, MonadOtel 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
|] getTransmissionTorrentsTable :: (MonadTransmission m, MonadThrow m, MonadLogger m, MonadOtel m) => m Html getTransmissionTorrentsTable = do let fields = [ "hashString", "name", "percentDone", "percentComplete", "downloadDir", "files" ] doTransmissionRequest' ( transmissionRequestListAllTorrents fields $ do Json.asObject <&> KeyMap.toMapText ) <&> \resp -> Html.toTable ( resp & List.sortOn (\m -> m & Map.lookup "percentDone" & fromMaybe (Json.Number 0)) <&> Map.toList -- TODO & List.take 100 ) unzip3PGArray :: [(a1, a2, a3)] -> (PGArray a1, PGArray a2, PGArray a3) unzip3PGArray xs = xs & unzip3 & \(a, b, c) -> (PGArray a, PGArray b, PGArray c) assertOneUpdated :: (HasField "numberOfRowsAffected" r Natural, MonadThrow m, MonadIO m) => Otel.Span -> Text -> r -> m () assertOneUpdated span name x = case x.numberOfRowsAffected of 1 -> pure () n -> appThrowTree span ([fmt|{name :: Text}: Expected to update exactly one row, but updated {n :: Natural} row(s)|]) migrate :: ( MonadPostgres m, MonadOtel m ) => Transaction m (Label "numberOfRowsAffected" Natural) migrate = inSpan "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)); |] () httpTorrent :: ( MonadIO m, MonadThrow m ) => Otel.Span -> Http.Request -> m ByteString httpTorrent span req = Http.httpBS req >>= assertM span ( \resp -> do let statusCode = resp & Http.responseStatus & (.statusCode) contentType = resp & Http.responseHeaders & List.lookup "content-type" <&> Wai.parseContentType <&> (\(ct, _mimeAttributes) -> ct) if | statusCode == 200, Just "application/x-bittorrent" <- contentType -> Right $ (resp & Http.responseBody) | statusCode == 200, Just otherType <- contentType -> Left [fmt|Redacted returned a non-torrent body, with content-type "{otherType}"|] | statusCode == 200, Nothing <- contentType -> Left [fmt|Redacted returned a body with unspecified content type|] | code <- statusCode -> Left [fmt|Redacted returned an non-200 error code, code {code}: {resp & showPretty}|] ) 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.newPool $ Pool.defaultPoolConfig {- resource init action -} (Postgres.connectPostgreSQL (db & TmpPg.toConnectionString)) {- resource destruction -} Postgres.close {- unusedResourceOpenTime -} 10 {- max resources across all stripes -} 20 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 ( do (processors, opts) <- Otel.getTracerProviderInitializationOptions tp <- Otel.createTracerProvider processors -- workaround the attribute length bug https://github.com/iand675/hs-opentelemetry/issues/113 ( opts { Otel.tracerProviderOptionsAttributeLimits = opts.tracerProviderOptionsAttributeLimits { Otel.attributeCountLimit = Just 65_000 } } ) Otel.setGlobalTracerProvider tp pure tp ) -- 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