added EDE templating

server/Routes.hs

@@ -18,6 +18,7 @@ import Data.ByteString.Lazy.Internal (ByteString)
 import Control.Monad.Cont (liftIO)
 
 import qualified Data.ByteString.Lazy.UTF8 as BSL.U
+import Templates (renderAppHtml)
 
 
 directory :: FilePath
@@ -60,7 +61,7 @@ workFlowServer = mainServer :<|> appServer :<|> fileServer
     handleRequest :: Bool -> Handler HTMLTemplate
     handleRequest appReq = do
       liftIO . putStrLn $ "GET request for main application" ++ if appReq then " @/app" else ""
-      html <- liftIO $ BSL.U.fromString <$> readFile "editor.html"
+      html <- liftIO $ BSL.U.fromString <$> renderAppHtml Nothing
       return $ HTMLTemp html 
 
 userAPI :: Proxy Home

server/ServerMain.hs

@@ -15,18 +15,18 @@ serverMain = do
   -- putStrLn "Starting file server @ http://localhost:8080/"
   -- fileServerThread <- forkIO $ run 8080 files
   -- putStrLn "File server is running\n"
-  putStrLn "Starting app @ http://localhost:8080/"
+  putStrLn "Starting Workflow Visualiser @ http://localhost:8080/\n"
   run 8080 workFlows
     where
       printGreeter = do
         putStrLn "\n\n"
         putStrLn "       _.=:'^^':=._            "
         putStrLn "     +^            ^+           .__.      .__.   .__.   .__."
-        putStrLn "   +°     (.**.)     °+         |  |      |  |   |  |  /  /"
-        putStrLn " °+     (.*oOOo*.)     +°       |  | .__. |  |   |  | /  /"
-        putStrLn "+^     (.oO(00)Oo.)     ^+      |  |/    \\|  |   |  |/  /"
-        putStrLn " °+     (.*oOOo*.)     +°       |  |  /\\  |  |   |  |  /"
-        putStrLn "   +°     (.**.)     °+         |    /  \\    |   |    /"
+        putStrLn "   +°     (.**.)     °+         |~~|      |~~|   |**|  /::/"
+        putStrLn " °+     (.*oOOo*.)     +°       |<>| .__. |<>|   |::| /**/"
+        putStrLn "+^     (.oO(00)Oo.)     ^+      |~~|/<><>\\|~~|   |**|/::/"
+        putStrLn " °+     (.*oOOo*.)     +°       |<>|~~/\\~~|<>|   |::|**/"
+        putStrLn "   +°     (.**.)     °+         |~~<>/  \\<>~~|   |**::/"
         putStrLn "     °+_.        ._+°           |___/    \\___|   |___/"
         putStrLn "         ^=`°°`=^"
         putStrLn "\n\n"

server/Templates.hs

@@ -0,0 +1,24 @@
+-- SPDX-FileCopyrightText: 2023 David Mosbach <david.mosbach@campus.lmu.de>
+--
+-- SPDX-License-Identifier: AGPL-3.0-or-later
+
+module Templates where
+
+import Text.EDE
+import Data.Either (fromRight)
+import Data.HashMap.Strict
+import Data.Aeson (Value)
+import Data.Maybe (fromMaybe)
+import Data.Text
+
+
+import qualified Data.Text.Lazy as TL
+
+type RenderContext = HashMap Text Value
+
+
+renderAppHtml :: Maybe RenderContext -> IO String
+renderAppHtml context = do
+  template <- eitherParseFile "editor.html"
+  let result = either error id $ template >>= (`eitherRender` fromMaybe (fromPairs [] :: RenderContext) context)
+  return $ TL.unpack result

workflow-visualiser.cabal

@@ -30,7 +30,8 @@ executable workflow-visualiser
                    Index,
                    YamlParser,
                    ServerMain,
-                   Routes
+                   Routes,
+                   Templates
 
     -- LANGUAGE extensions used by modules in this package.
     -- other-extensions:
@@ -40,6 +41,7 @@ executable workflow-visualiser
                       bytestring,
                       utf8-string,
                       containers,
+                      unordered-containers,
                       text,
                       vector,
                       directory,
@@ -50,6 +52,6 @@ executable workflow-visualiser
                       wai,
                       warp,
                       http-media,
-                      shakespeare
+                      ede
     hs-source-dirs:   app, server
     default-language: Haskell2010