remove DNSChain mode

It's been dead for a few years now...

README.md

@@ -1,11 +1,13 @@
 # Rosa
+
 ## Query the namecoin blockchain
 
 Rosa is a commmand line tool to query the namecoin blockchain.
 
-It gets the JSON value of a name and other data using namecoind local server or the dnschain REST api and displays it in a pretty format.
+It gets the JSON value of a name and other data using namecoind local server and displays it in a pretty format.
 
 ### Usage
+
 Run rosa -h for help
 
 Show the value for a name with
@@ -35,7 +37,7 @@ Connect to namecoind server for blockchain data
 
 ### License
 
-Copyright (C) 2015 Michele Guerini Rocco
+Copyright (C) 2022 Michele Guerini Rocco
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by

rosa.cabal

@@ -5,14 +5,13 @@ description:
 
   Rosa is a commmand line tool to query the namecoin blockhain.
   It gets the JSON value of a name and other infos using namecoind
-  local server or the dnschain REST api and display them in a pretty 
-  format.
+  local server and displays them in a pretty format.
                      
 license:             GPL-3
 license-file:        LICENSE
 author:              rnhmjoj
 maintainer:          rnhmjoj@inventati.org
-copyright:           (C) Michele Guerini Rocco 2019
+copyright:           (C) Michele Guerini Rocco 2022
 category:            Utility
 build-type:          Simple
 extra-source-files:  README.md, LICENSE
@@ -29,7 +28,7 @@ executable rosa
   default-language:    Haskell2010
   other-extensions:    RecordWildCards, OverloadedStrings
   build-depends:       base >=4.8 && <5.0 , aeson, text,
-                       vector, uri-encode, unordered-containers,
-                       wreq, lens, bytestring, directory,
+                       vector, uri-encode,
+                       bytestring, directory,
                        optparse-applicative, namecoin-update
   ghc-options:         -O2

src/Main.hs

@@ -9,7 +9,6 @@ import Json
 
 -- Networking
 import Namecoin                    (rpcRequest, uri)
-import Network.Wreq                (get, responseBody)
 import qualified Network.URI.Encode as U
 
 -- IO
@@ -18,14 +17,12 @@ import System.Directory            (XdgDirectory(..), getXdgDirectory)
 import qualified Data.Text.IO      as T
 
 -- Data manipulation
-import Data.Text                   (Text)
 import Data.Aeson                  (Value(..), encode, decode, toJSON)
 import Data.Aeson.KeyMap           (delete)
 import Data.ByteString.Lazy.Char8  (pack, unpack)
 
 -- Misc
 import Data.Maybe                  (fromMaybe)
-import Control.Lens                (view)
 import Control.Monad               (when)
 
 
@@ -34,9 +31,7 @@ import Control.Monad               (when)
 -- | Program arguments record
 data Options = Options
   { name     :: String
-  , url      :: String
   , conf     :: Maybe FilePath
-  , dnschain :: Bool
   , block    :: Bool
   , raw      :: Bool
   }
@@ -47,21 +42,11 @@ options = Options
   <$> strArgument
       ( metavar "NAME"
      <> help "Namecoin name id" )
-  <*> strOption
-      ( long "url"
-     <> short 'u'
-     <> value "http://namecoin.dns"
-     <> metavar "URL"
-     <> help "Use custom API URL" )
   <*> (optional $ strOption $
         long "conf"
      <> short 'c'
      <> metavar "FILE"
      <> help "Use custom namecoin config file" )
-  <*> switch
-      ( long "dnschain"
-     <> short 'd'
-     <> help "Use dnschain API " )
   <*> switch
       ( long "block"
      <> short 'b'
@@ -86,10 +71,7 @@ description = info (helper <*> options)
 -- | Main function
 main :: IO ()
 main = execParser description >>= exec where
-  exec Options{..} =
-    if dnschain
-      then doDnschain url name raw block
-      else doLocal name raw block conf
+  exec Options{..} = doLocal name raw block conf
 
 
 -- | Load namecoin configuration
@@ -118,20 +100,3 @@ doLocal name raw block conf = do
       where
         tryParse  = fromMaybe (res |. "value") . decode . pack
         blockInfo = toJSON (delete "value" res)
-
-
--- | Connect to dnschain API endpoint
-doDnschain :: String -> String -> Bool -> Bool -> IO ()
-doDnschain url name raw block = do
-  body <- view responseBody <$> get (url++"/v1/namecoin/key/"++U.encode name)
-  if raw
-    then putStrLn (unpack body)
-    else do
-      case decode body of
-        Nothing  -> putStrLn "Error parsing data"
-        Just res -> putStrLn $
-            if block
-              then repr res
-              else repr $ (res .| "data") .| "value"
-
-  where (Object x) .| y = x |. y