{-# 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|<div hx-trigger="every 1s" hx-swap="outerHTML" hx-post={call} hx-vals={Enc.encToBytesUtf8 extraData}>{innerHtml}</div>|]
mainHtml = runTransaction $ do
bestTorrentsTable <- getBestTorrentsTable
transmissionTorrentsTable <- lift @Transaction getTransmissionTorrentsTable
pure $
Html.docTypeHtml
[hsx|
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-geWF76RCwLtnZ8qwWowPQNguL3RmwHVBC9FhGdlKrxdiJJigb/j/68SIy3Te4Bkz" crossorigin="anonymous"></script>
<script src="https://unpkg.com/htmx.org@1.9.2" integrity="sha384-L6OqL9pRWyyFU3+/bjdSri+iIphTN/bvYyM37tICVyOJkWZLpP2vGn6VUEXgzg6h" crossorigin="anonymous"></script>
</head>
<body>
<form
hx-post="/snips/redacted/search"
hx-target="#redacted-search-results">
<label for="redacted-search">Redacted Search</label>
<input
id="redacted-search"
type="text"
name="redacted-search" />
<button type="submit">Search</button>
</form>
<div id="redacted-search-results">
{bestTorrentsTable}
</div>
<div id="transmission-torrents">
{transmissionTorrentsTable}
</div>
</body>
|]
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|<button hx-post="snips/redacted/getTorrentFile" hx-swap="outerHTML" hx-vals={Enc.encToBytesUtf8 $ Enc.object [("torrent-id", Enc.int b.torrentId)]}>Upload Torrent</button>|]
InTransmission info -> [hsx|{info.transmissionInfo.percentDone.unPercentage}% done|]
NotInTransmissionYet -> [hsx|<button hx-post="snips/redacted/startTorrentFile" hx-swap="outerHTML" hx-vals={Enc.encToBytesUtf8 $ Enc.object [("torrent-id", Enc.int b.torrentId)]}>Start Torrent</button>|]
let bestRows =
fresh
& foldMap
( \b -> do
[hsx|
<tr>
<td>{localTorrent b}</td>
<td>{Html.toHtml @Int b.groupId}</td>
<td>{Html.toHtml @Text b.torrentGroupJson.artist}</td>
<td>{Html.toHtml @Text b.torrentGroupJson.groupName}</td>
<td>{Html.toHtml @Int b.seedingWeight}</td>
<td><details hx-trigger="toggle once" hx-post="snips/redacted/torrentDataJson" hx-vals={Enc.encToBytesUtf8 $ Enc.object [("torrent-id", Enc.int b.torrentId)]}></details></td>
</tr>
|]
)
pure $
[hsx|
<table class="table">
<thead>
<tr>
<th>Local</th>
<th>Group ID</th>
<th>Artist</th>
<th>Name</th>
<th>Weight</th>
<th>Torrent</th>
<th>Torrent Group</th>
</tr>
</thead>
<tbody>
{bestRows}
</tbody>
</table>
|]
-- | 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|<em>true</em>|]
Json.Bool False -> [hsx|<em>false</em>|]
Json.Null -> [hsx|<em>null</em>|]
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|<p>No results.</p>|]
Just xs' -> do
let headers = xs' & NonEmpty.head <&> fst <&> (\h -> [hsx|<th>{h}</th>|]) & mconcat
let vals = xs' & foldMap (Html.tr . foldMap (Html.td . mkVal . snd))
[hsx|
<table class="table">
<thead>
<tr>
{headers}
</tr>
</thead>
<tbody>
{vals}
</tbody>
</table>
|]
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]
