And we have a new service

CHANGELOG.md

@@ -0,0 +1,5 @@
+# Revision history for dtek.link
+
+## 0.1.0.0 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.

LICENSE

@@ -1,7 +1,7 @@
                     GNU AFFERO GENERAL PUBLIC LICENSE
                        Version 3, 19 November 2007
 
- Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -633,8 +633,8 @@ the "copyright" line and a pointer to where the full notice is found.
     Copyright (C) <year>  <name of author>
 
     This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU Affero General Public License as published
-    by the Free Software Foundation, either version 3 of the License, or
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
@@ -643,7 +643,7 @@ the "copyright" line and a pointer to where the full notice is found.
     GNU Affero General Public License for more details.
 
     You should have received a copy of the GNU Affero General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
@@ -658,4 +658,4 @@ specific requirements.
   You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU AGPL, see
-<https://www.gnu.org/licenses/>.
+<http://www.gnu.org/licenses/>.

app/Main.hs

@@ -0,0 +1,76 @@
+{-# LANGUAGE BlockArguments #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE DeriveAnyClass #-}
+{-# LANGUAGE DeriveGeneric #-}
+
+module Main where
+
+import           Web.Scotty                           hiding (Options)
+import           WithCli
+import           Network.Wai.Middleware.RequestLogger
+import           Network.Wai.Middleware.Cors
+import           Control.Monad.IO.Class
+import           Network.HTTP.Types.Status
+import           Data.Aeson                           hiding (Options)
+import           Data.Aeson.Types                     hiding (Options)
+import           Data.Text.Internal.Lazy
+import           Data.Text                            hiding (Text, head, filter)
+import           Network.HTTP.Simple
+
+data Options = Options
+  {
+    port :: Int
+  , apiURL :: String
+  } deriving (Show, Generic, HasArguments)
+
+data Redirects = Redirects
+  {
+    from :: Text
+  , to   :: Text
+  } deriving (Show, Generic)
+
+instance FromJSON Redirects where
+  parseJSON (Object v) = Redirects <$>
+    v .: "url" <*>
+    v .: "link"
+  parseJSON invalid    =
+    prependFailure "parsing JSONResponse failed, "
+      (typeMismatch "Object" invalid)
+
+data Data = Data {redirs :: [Redirects]}
+  deriving (Show, Generic)
+
+instance FromJSON Data where
+  parseJSON (Object v) = Data <$>
+    v .: "data"
+  parseJSON invalid    =
+    prependFailure "parsing JSONResponse failed, "
+      (typeMismatch "Object" invalid)
+
+
+routes :: String -> ScottyM ()
+routes address = do
+  middleware logStdout
+  middleware simpleCors
+
+  get "/:word" $ do
+    url :: Text <- param "word" 
+    redirects <- liftIO $ fetchRedirs address
+    let link = to $ head $ filter ((url ==) . from) redirects
+    redirect link
+
+  notFound $ 
+    status $ mkStatus 404 "Link not found"
+
+fetchRedirs :: String -> IO [Redirects]
+fetchRedirs address = do
+    request <- parseRequest address
+    res <- httpJSON request
+    return $ redirs (getResponseBody res :: Data)
+
+main :: IO ()
+main = withCli run
+
+run :: Options -> IO ()
+run (Options port api) =
+  scotty port $ routes api

dtek-link.cabal

@@ -0,0 +1,86 @@
+cabal-version:      3.4
+-- The cabal-version field refers to the version of the .cabal specification,
+-- and can be different from the cabal-install (the tool) version and the
+-- Cabal (the library) version you are using. As such, the Cabal (the library)
+-- version used must be equal or greater than the version stated in this field.
+-- Starting from the specification version 2.2, the cabal-version field must be
+-- the first thing in the cabal file.
+
+-- Initial package description 'dtek.link' generated by
+-- 'cabal init'. For further documentation, see:
+--   http://haskell.org/cabal/users-guide/
+--
+-- The name of the package.
+name:               dtek-link
+
+-- The package version.
+-- See the Haskell package versioning policy (PVP) for standards
+-- guiding when and how versions should be incremented.
+-- https://pvp.haskell.org
+-- PVP summary:     +-+------- breaking API changes
+--                  | | +----- non-breaking API additions
+--                  | | | +--- code changes with no API change
+version:            0.1.0.0
+
+-- A short (one-line) description of the package.
+synopsis:           Dtek's link forwarder
+
+-- A longer description of the package.
+-- description:
+
+-- The license under which the package is released.
+license:            AGPL-3.0-or-later
+
+-- The file containing the license text.
+license-file:       LICENSE
+
+-- The package author(s).
+-- author:
+
+-- An email address to which users can send suggestions, bug reports, and patches.
+maintainer:         [email protected]
+
+-- A copyright notice.
+-- copyright:
+category:           Web
+build-type:         Simple
+
+-- Extra doc files to be distributed with the package, such as a CHANGELOG or a README.
+extra-doc-files:    CHANGELOG.md
+
+-- Extra source files to be distributed with the package, such as examples, or a tutorial module.
+-- extra-source-files:
+
+common warnings
+    ghc-options: -Wall
+
+executable dtek.link
+    -- Import common warning flags.
+    import:           warnings
+
+    -- .hs or .lhs file containing the Main module.
+    main-is:          Main.hs
+
+    -- Modules included in this executable, other than Main.
+    -- other-modules:
+
+    -- LANGUAGE extensions used by modules in this package.
+    -- other-extensions:
+
+    -- Other library packages from which modules are imported.
+    build-depends:    aeson >=2.1.2.1
+                    , base ^>=4.17.0.0
+                    , bytestring >= 0.11.3.1
+                    , getopt-generics >=0.13.1.0
+                    , http-conduit >=2.3.8
+                    , http-types >= 0.12.3
+                    , scotty >=0.12.1
+                    , text >= 2.0.1
+                    , wai-cors >=0.2.7
+                    , wai-extra >=3.1.13.0
+
+    -- Directories containing source files.
+    hs-source-dirs:   app
+
+    -- Base language which the package is written in.
+    default-language: GHC2021

hie.yaml

@@ -0,0 +1,4 @@
+cradle:
+  cabal:
+    - path: "app/Main.hs"
+      component: "dtek-link:exe:dtek.link"