From 84fa12fef1736d04ee79e40cebaadadda262f063 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ra=C3=BAl=20Benencia?= <rul@kalgan.cc>
Date: Tue, 3 Sep 2013 20:24:51 -0300
Subject: Mark as read functionality

---
 Email.hs    |  2 +-
 Handlers.hs | 41 +++++++++++++++++++++++++++++++++++++++--
 Maildir.hs  | 31 +++++++++++++++++++++++++------
 State.hs    | 12 +++++++-----
 Types.hs    |  2 ++
 5 files changed, 74 insertions(+), 14 deletions(-)

diff --git a/Email.hs b/Email.hs
index 659d96b..db6f17b 100644
--- a/Email.hs
+++ b/Email.hs
@@ -20,7 +20,7 @@ getBody msg =
       Nothing -> "This email has no displayable content."
   where
     unwrapContent (Single c) = c
-
+    
 -- hackish function for showing the email. In he future the logic of this
 -- function should be improved.
 firstTextPart []       = Nothing
diff --git a/Handlers.hs b/Handlers.hs
index da886b3..5c04f89 100644
--- a/Handlers.hs
+++ b/Handlers.hs
@@ -26,7 +26,13 @@ import Types
 
 previousMode :: Mode -> LazymailCurses ()
 previousMode MaildirMode = (=<<) put $ get >>= \st -> return st { exitRequested = True }
-previousMode EmailMode   = (=<<) put $ get >>= \st -> return st { mode = IndexMode }
+previousMode EmailMode   = do
+  st <- get
+  if (triggerUpdateIn . indexState $ st)
+  then do
+    changeMode MaildirMode
+    solveIndexUpdate
+  else put $ st { mode = IndexMode }
 previousMode IndexMode   = do
   st <- get
   let ist = (indexState st) { selectedRowIn = 0, scrollRowIn = 0 }
@@ -36,7 +42,13 @@ changeMode :: Mode -> LazymailCurses ()
 changeMode EmailMode   = return ()
 changeMode IndexMode   = do
   st <- get
-  msg <- liftIO $ UTF8.readFile (selectedEmailPath . indexState $ st)
+  let fp = selectedEmailPath . indexState $ st
+  nfp <- if (isNew fp)
+         then liftIO $ markAsRead fp
+         else return fp
+  when (fp /= nfp) triggerIndexUpdate
+  st <- get
+  msg <- liftIO $ UTF8.readFile nfp
   let email = parseMIMEMessage msg
   let body = getBody $ email
   let el = formatBody body $ screenColumns st
@@ -193,3 +205,28 @@ formatMaildirModeRows st = mapM formatRow where
     pad     = "  "
     numPads = (length $ filter (== '/') str) + (length $ filter (`elem` imapSep) str)
     imapSep = ['.'] -- IMAP usually separates its directories with dots
+
+triggerIndexUpdate :: LazymailCurses ()
+triggerIndexUpdate = do
+  st <- get
+  let ist = indexState st
+  put $ st { indexState = (ist { triggerUpdateIn = True }) }
+  
+solveIndexUpdate :: LazymailCurses ()
+solveIndexUpdate = do
+  st <- get
+  let ist = indexState st
+  put $ st { indexState = (ist { triggerUpdateIn = False }) }  
+  
+triggerMaildirUpdate :: LazymailCurses ()
+triggerMaildirUpdate = do
+  st <- get
+  let mst = maildirState st
+  put $ st { maildirState = (mst { triggerUpdateMD = True }) }
+  
+solveMaildirUpdate :: LazymailCurses ()
+solveMaildirUpdate = do
+  st <- get
+  let mst = maildirState st
+  put $ st { maildirState = (mst { triggerUpdateMD = False }) }
+
diff --git a/Maildir.hs b/Maildir.hs
index 7e2941d..752f6f0 100644
--- a/Maildir.hs
+++ b/Maildir.hs
@@ -11,8 +11,8 @@ module Maildir  where
 import Control.Monad.Loops(allM)
 import Control.Monad (forM, filterM)
 import Data.List(isPrefixOf)
-import System.Directory (doesDirectoryExist, getDirectoryContents)
-import System.FilePath ((</>))
+import System.Directory (doesDirectoryExist, getDirectoryContents, renameFile)
+import System.FilePath ((</>), takeFileName, takeDirectory, splitDirectories, joinPath)
 import System.IO(IOMode(..), hGetContents, openFile)
 
 import Types(Maildir, Flag(..), Flags)
@@ -40,10 +40,29 @@ getMessages :: Maildir -> [FilePath] -> IO [(FilePath, Flags, String)]
 getMessages mb list =  do
   messages <- getAll mb
   return $ filter (\(id, f, m) -> id `elem` list) messages
-
---
--- | Based on getRecursiveContents from Real World Haskell
---
+  
+{- Given a mail in a Maildir, mark it as read -}
+markAsRead :: FilePath -> IO FilePath
+markAsRead fp =
+  case newPath of
+    Nothing -> return fp
+    Just path -> do
+      renameFile fp path
+      return path
+  where newPath = 
+          if not $ isNew fp
+          then Just fp
+          else do
+            let fil = takeFileName fp
+            let dir = takeDirectory fp
+            let spl = splitDirectories dir
+            case last spl of
+              "cur" -> Just $ fp ++ "S"
+              "new" -> Just $ (joinPath . init $ spl) </> ("cur" </> (fil ++ "S"))
+              _     -> Nothing
+
+
+-- Based on getRecursiveContents from Real World Haskell
 getMaildirsRecursively :: FilePath -> IO [Maildir]
 getMaildirsRecursively topdir = do
   result <- search topdir
diff --git a/State.hs b/State.hs
index 5d04035..5c3112f 100644
--- a/State.hs
+++ b/State.hs
@@ -33,11 +33,12 @@ initialState = LazymailState {
 }
 
 initialMaildirState = MaildirState {
-    selectedRowMD  = 0
-  , selectedMD     = ""
-  , detectedMDs    = []
-  , scrollRowMD    = 0
-  , scrollBufferMD = []
+    selectedRowMD   = 0
+  , selectedMD      = ""
+  , detectedMDs     = []
+  , scrollRowMD     = 0
+  , scrollBufferMD  = []
+  , triggerUpdateMD = False
 }
 
 initialIndexState = IndexState {
@@ -47,6 +48,7 @@ initialIndexState = IndexState {
   , scrollRowIn        = 0
   , currentInLen       = 0
   , scrollBufferIn     = []
+  , triggerUpdateIn    = False
 }
 
 initialEmailState = EmailState {
diff --git a/Types.hs b/Types.hs
index c5e9428..07c9144 100644
--- a/Types.hs
+++ b/Types.hs
@@ -88,6 +88,7 @@ data MaildirState = MaildirState {
   , detectedMDs     :: [(FilePath, String)]
   , scrollRowMD     :: Int
   , scrollBufferMD  :: [(FilePath, String)]
+  , triggerUpdateMD :: Bool 
 }
 
 data IndexState = IndexState {
@@ -97,6 +98,7 @@ data IndexState = IndexState {
   , scrollRowIn       :: Int
   , currentInLen      :: Int
   , scrollBufferIn    :: [(FilePath, String)]
+  , triggerUpdateIn   :: Bool
 }
 
 data ComposeState = ComposeState {
-- 
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