From 918dcdb602622af47f0607519b95c3aa2abab5ff Mon Sep 17 00:00:00 2001
From: Yuchen Pei <hi@ypei.me>
Date: Wed, 5 Oct 2022 11:54:57 +1100
Subject: Adding a greet api to get server info (currently only version)

---
 app/Server.hs | 16 ++++++++++++----
 hcel.cabal    |  2 +-
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/app/Server.hs b/app/Server.hs
index 1c9980d..e4efd36 100644
--- a/app/Server.hs
+++ b/app/Server.hs
@@ -48,7 +48,7 @@ import Data.IntervalMap.Interval (Interval(..), subsumes)
 import qualified Data.IntervalMap.Strict as IVM
 import qualified Data.List as L
 import qualified Data.Map.Strict as M
-import Data.Maybe (fromMaybe, listToMaybe, mapMaybe)
+import Data.Maybe (fromMaybe, mapMaybe)
 import qualified Data.Vector as V
 import qualified GHC.Compact as C
 import Data.Pagination
@@ -67,7 +67,7 @@ import qualified Data.Text as T
 import qualified Data.Text.Encoding as TE
 import Data.Text.Lazy (toStrict)
 import Data.Text.Read(decimal)
-import Data.Version (Version(..))
+import Data.Version (Version(..), showVersion)
 import GHC.Exts (Down(..), groupWith)
 import GHC.Generics (Generic)
 import qualified HaskellCodeExplorer.Types as HCE
@@ -114,6 +114,7 @@ import Options.Applicative
   , strOption
   , switch
   )
+import qualified Paths_hcel (version)
 import Servant
   ( (:<|>)(..)
   , (:>)
@@ -909,7 +910,8 @@ handleSync onError =
 -- Servant API
 --------------------------------------------------------------------------------
 
-type API = GetAllPackages
+type API = Greet
+  :<|> GetAllPackages
   :<|> GetDefinitionSite
   :<|> GetExpressions
   :<|> GetReferences
@@ -920,6 +922,8 @@ type API = GetAllPackages
   :<|> GetGlobalIdentifierE
   :<|> GetHoogleDocs
 
+type Greet = "api" :> "greet" :> Get '[JSON] T.Text
+
 type GetAllPackages = "api" :> "packages" :> Get '[JSON] AllPackages
 
 type GetDefinitionSite = "api" :> "definitionSite"
@@ -1067,6 +1071,9 @@ data SourceFile = SourceFile
 instance A.ToJSON ReferenceWithSource
 instance A.ToJSON SourceFile
 
+greet :: ReaderT Environment IO T.Text
+greet = return $ T.pack $ showVersion Paths_hcel.version
+
 getAllPackages :: ReaderT Environment IO AllPackages
 getAllPackages = asks envPackageVersions
 
@@ -1853,7 +1860,8 @@ server env =
   hoistServer
     (Proxy :: Proxy API)
     toServantHandler
-    (getAllPackages :<|>
+    (greet :<|>
+     getAllPackages :<|>
      getDefinitionSite :<|>
      getExpressions :<|>
      getReferences :<|>
diff --git a/hcel.cabal b/hcel.cabal
index 99fde6d..34d7c2d 100644
--- a/hcel.cabal
+++ b/hcel.cabal
@@ -80,7 +80,7 @@ executable haskell-code-server
   main-is:             Server.hs
   ghc-options:        -Wall -O2 -rtsopts -funbox-strict-fields -threaded
   hs-source-dirs: app,src
-  other-modules: HaskellCodeExplorer.Types, Store
+  other-modules: HaskellCodeExplorer.Types, Paths_hcel, Store
   build-depends:     IntervalMap
                    , aeson
                    , base
-- 
cgit v1.2.3