Implement POC of `brick`

app/Main.hs

@@ -2,6 +2,7 @@
 
 module Main where
 
+import Brick (simpleMain)
 import Control.Monad (void)
 import Control.Monad.IO.Class (liftIO)
 import qualified Data.ByteString as B
@@ -12,9 +13,11 @@ import qualified Data.Text as T
 import qualified Data.Text.IO as TIO
 import Data.Time.Clock.POSIX
 import System.Console.StructuredCLI
+import System.Environment (getArgs)
 import System.Exit
 import System.IO
 import Text.Read (readMaybe)
+import Zenith.CLI
 import Zenith.Types (ZcashAddress(..), ZcashPool(..), ZcashTx(..))
 import Zenith.Utils
 import Zenith.Zcashd
@@ -196,14 +199,29 @@ processUri user pwd =
 main :: IO ()
 main = do
   config <- load ["zenith.cfg"]
+  args <- getArgs
   nodeUser <- require config "nodeUser"
   nodePwd <- require config "nodePwd"
-  checkServer nodeUser nodePwd
-  void $
-    runCLI
-      "Zenith"
-      def
-        { getBanner =
-            "                         ______          _ _   _    \n                        |___  /         (_) | | |    \n                           / / ___ _ __  _| |_| |__  \n                          / / / _ \\ '_ \\| | __| '_ \\ \n                         / /_|  __/ | | | | |_| | | |\n                        /_____\\___|_| |_|_|\\__|_| |_|\n                         Zcash Full Node CLI v0.4.0"
-        }
-      (root nodeUser nodePwd)
+  if not (null args)
+    then do
+      case head args of
+        "legacy" -> do
+          checkServer nodeUser nodePwd
+          void $
+            runCLI
+              "Zenith"
+              def
+                { getBanner =
+                    "                         ______          _ _   _    \n                        |___  /         (_) | | |    \n                           / / ___ _ __  _| |_| |__  \n                          / / / _ \\ '_ \\| | __| '_ \\ \n                         / /_|  __/ | | | | |_| | | |\n                        /_____\\___|_| |_|_|\\__|_| |_|\n                         Zcash Full Node CLI v0.4.0"
+                }
+              (root nodeUser nodePwd)
+        "cli" -> simpleMain ui
+        _ -> printUsage
+    else printUsage
+
+printUsage :: IO ()
+printUsage = do
+  putStrLn "zenith [command] [parameters]\n"
+  putStrLn "Available commands:"
+  putStrLn "legacy\tLegacy CLI for zcashd"
+  putStrLn "cli\tCLI for zebrad"

package.yaml

@@ -43,6 +43,7 @@ library:
   - persistent
   - persistent-sqlite
   - persistent-template
+  - brick
   - zcash-haskell
 
 executables:
@@ -64,6 +65,7 @@ executables:
     - text
     - time
     - sort
+    - brick
 
 tests:
   zenith-test:

src/Zenith/CLI.hs

@@ -0,0 +1,13 @@
+module Zenith.CLI where
+
+import Brick (Widget, (<+>), joinBorders, simpleMain, str, withBorderStyle)
+import Brick.Widgets.Border (borderWithLabel, vBorder)
+import Brick.Widgets.Border.Style (unicode)
+import Brick.Widgets.Center (center)
+
+ui :: Widget ()
+ui =
+  joinBorders $
+  withBorderStyle unicode $
+  borderWithLabel (str "Zenith") $
+  (center (str "Addresses") <+> vBorder <+> center (str "Transactions"))

zenith.cabal

@@ -25,6 +25,7 @@ source-repository head
 
 library
   exposed-modules:
+      Zenith.CLI
       Zenith.DB
       Zenith.Types
       Zenith.Utils
@@ -39,6 +40,7 @@ library
     , array
     , base >=4.7 && <5
     , base64-bytestring
+    , brick
     , bytestring
     , http-conduit
     , http-types
@@ -64,6 +66,7 @@ executable zenith
   ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall -Wunused-imports
   build-depends:
       base >=4.7 && <5
+    , brick
     , bytestring
     , configurator
     , data-default