terminal: option to execute a single chat command via command line (#515)

apps/simplex-chat/Main.hs

@@ -2,24 +2,35 @@
 
 module Main where
 
+import Control.Concurrent (threadDelay)
 import Simplex.Chat
-import Simplex.Chat.Controller (versionNumber)
+import Simplex.Chat.Bot
+import Simplex.Chat.Controller (ChatConfig, versionNumber)
 import Simplex.Chat.Options
 import Simplex.Chat.Terminal
+import Simplex.Chat.View (serializeChatResponse)
 import System.Directory (getAppUserDataDirectory)
 import System.Terminal (withTerminal)
 
+cfg :: ChatConfig
+cfg = defaultChatConfig
+
 main :: IO ()
 main = do
-  opts <- welcomeGetOpts
-  t <- withTerminal pure
-  simplexChat defaultChatConfig opts t
-
-welcomeGetOpts :: IO ChatOpts
-welcomeGetOpts = do
   appDir <- getAppUserDataDirectory "simplex"
-  opts@ChatOpts {dbFilePrefix} <- getChatOpts appDir "simplex_v1"
+  opts@ChatOpts {chatCmd} <- getChatOpts appDir "simplex_v1"
+  if null chatCmd
+    then do
+      welcome opts
+      t <- withTerminal pure
+      simplexChat cfg opts t
+    else simplexChatBot cfg opts $ \_ cc -> do
+      r <- sendCmd cc chatCmd
+      putStrLn $ serializeChatResponse r
+      threadDelay $ chatCmdDelay opts * 1000000
+
+welcome :: ChatOpts -> IO ()
+welcome ChatOpts {dbFilePrefix} = do
   putStrLn $ "SimpleX Chat v" ++ versionNumber
   putStrLn $ "db: " <> dbFilePrefix <> "_chat.db, " <> dbFilePrefix <> "_agent.db"
   putStrLn "type \"/help\" or \"/h\" for usage info"
-  pure opts

src/Simplex/Chat/Mobile.hs

@@ -51,7 +51,9 @@ mobileChatOpts =
     { dbFilePrefix = "simplex_v1", -- two database files will be created: simplex_v1_chat.db and simplex_v1_agent.db
       smpServers = [],
       logConnections = False,
-      logAgent = False
+      logAgent = False,
+      chatCmd = "",
+      chatCmdDelay = 3
     }
 
 defaultMobileConfig :: ChatConfig

src/Simplex/Chat/Options.hs

@@ -1,3 +1,5 @@
+{-# LANGUAGE ApplicativeDo #-}
+{-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
 
 module Simplex.Chat.Options
@@ -20,13 +22,15 @@ data ChatOpts = ChatOpts
   { dbFilePrefix :: String,
     smpServers :: [SMPServer],
     logConnections :: Bool,
-    logAgent :: Bool
+    logAgent :: Bool,
+    chatCmd :: String,
+    chatCmdDelay :: Int
   }
 
 chatOpts :: FilePath -> FilePath -> Parser ChatOpts
-chatOpts appDir defaultDbFileName =
-  ChatOpts
-    <$> strOption
+chatOpts appDir defaultDbFileName = do
+  dbFilePrefix <-
+    strOption
       ( long "database"
           <> short 'd'
           <> metavar "DB_FILE"
@@ -34,7 +38,8 @@ chatOpts appDir defaultDbFileName =
           <> value defaultDbFilePath
           <> showDefault
       )
-    <*> option
+  smpServers <-
+    option
       parseSMPServers
       ( long "server"
           <> short 's'
@@ -43,16 +48,37 @@ chatOpts appDir defaultDbFileName =
             "Comma separated list of SMP server(s) to use"
           <> value []
       )
-    <*> switch
+  logConnections <-
+    switch
       ( long "connections"
           <> short 'c'
           <> help "Log every contact and group connection on start"
       )
-    <*> switch
+  logAgent <-
+    switch
       ( long "log-agent"
           <> short 'l'
           <> help "Enable logs from SMP agent"
       )
+  chatCmd <-
+    strOption
+      ( long "execute"
+          <> short 'e'
+          <> metavar "COMMAND"
+          <> help "Execute chat command (received messages won't be logged) and exit"
+          <> value ""
+      )
+  chatCmdDelay <-
+    option
+      auto
+      ( long "time"
+          <> short 't'
+          <> metavar "TIME"
+          <> help "Time to wait after sending chat command before exiting, seconds"
+          <> value 3
+          <> showDefault
+      )
+  pure ChatOpts {dbFilePrefix, smpServers, logConnections, logAgent, chatCmd, chatCmdDelay}
   where
     defaultDbFilePath = combine appDir defaultDbFileName