2 files changed, 93 insertions, 0 deletions
diff --git a/hsm-dummy-pulser/Main.hs b/hsm-dummy-pulser/Main.hs
new file mode 100644
index 0000000..5c1e818
--- /dev/null
+++ b/hsm-dummy-pulser/Main.hs
@@ -0,0 +1,72 @@
+{-# LANGUAGE ImportQualifiedPost #-}
+{-# LANGUAGE OverloadedRecordDot #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TemplateHaskell #-}
+
+module Main
+  ( main
+  )
+where
+
+import Data.Aeson.TH (defaultOptions, deriveFromJSON, rejectUnknownFields)
+import Data.Function ((&))
+import Data.Text (Text, show)
+import Effectful (Eff, runEff, (:>))
+import Effectful.Concurrent (Concurrent, runConcurrent, threadDelay)
+import Effectful.Log (runLog)
+import Effectful.Reader.Static (Reader, ask, runReader)
+import Effectful.Resource (runResource)
+import Effectful.State.Static.Local (evalState)
+import Hsm.Core.App (launch)
+import Hsm.Core.Fsm qualified as F
+import Hsm.Core.Zmq (runServer, send)
+import Streamly.Data.Fold (drain)
+import Streamly.Data.Stream (fold, mapM, repeatM)
+import Prelude hiding (mapM, show)
+
+data Env = Env
+  { name :: Text
+  , pubEp :: Text
+  , period :: Int
+  , pulses :: Int
+  }
+
+$(deriveFromJSON defaultOptions {rejectUnknownFields = True} ''Env)
+
+tick :: (Concurrent :> es, Reader Env :> es) => Eff es ()
+tick = ask >>= threadDelay . period >> return ()
+
+run :: F.FsmState () Int Env Int
+run = F.FsmState "run" action
+ where
+  action :: () -> Env -> Int -> F.FsmOutput () Int Env Int
+  action _ env state = if state < env.pulses then next else exit
+   where
+    next :: F.FsmOutput () Int Env Int
+    next =
+      "Sending pulse #" <> show state
+        & F.pLogInfo
+        & F.FsmOutput (Just $ F.FsmResult state (succ state) run)
+
+    exit :: F.FsmOutput () Int Env Int
+    exit =
+      "Reached " <> show env.pulses <> " pulses"
+        & F.pLogAttention
+        & F.FsmOutput Nothing
+
+main :: IO ()
+main =
+  launch @Env "dummy-pulser" $ \env logger level ->
+    ( repeatM tick
+        & F.fsmStream @_ @Int @Env @Int
+        & mapM (send @_ @Env)
+        & fold drain
+    )
+      & runServer @Env
+      & runConcurrent
+      & runLog env.name logger level
+      & runReader env
+      & runResource
+      & evalState @Int 1
+      & evalState run
+      & runEff
diff --git a/hsm-dummy-pulser/hsm-dummy-pulser.cabal b/hsm-dummy-pulser/hsm-dummy-pulser.cabal
new file mode 100644
index 0000000..7f89c08
--- /dev/null
+++ b/hsm-dummy-pulser/hsm-dummy-pulser.cabal
@@ -0,0 +1,21 @@
+cabal-version: 3.4
+author:        Paul Oliver
+build-type:    Simple
+maintainer:    contact@pauloliver.dev
+name:          hsm-dummy-pulser
+version:       0.1.0.0
+
+executable dummy-pulser
+  build-depends:
+    , aeson
+    , base
+    , effectful
+    , hsm-core
+    , log-effectful
+    , resourcet-effectful
+    , streamly-core
+    , text
+
+  main-is:          Main.hs
+  ghc-options:      -Wall -Wunused-packages
+  default-language: GHC2024