From 620e5840aba91d683bf7b4ee115079550aae8569 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Roman=20Smr=C5=BE?= <roman.smrz@seznam.cz>
Date: Sun, 19 May 2024 21:37:46 +0200
Subject: Conversation interface

Changelog: Added `/conversations` command to list and select conversations
---
 src/Erebos/Conversation.hs | 75 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 src/Erebos/Conversation.hs

(limited to 'src/Erebos/Conversation.hs')

diff --git a/src/Erebos/Conversation.hs b/src/Erebos/Conversation.hs
new file mode 100644
index 0000000..94d2399
--- /dev/null
+++ b/src/Erebos/Conversation.hs
@@ -0,0 +1,75 @@
+module Erebos.Conversation (
+    Message,
+    messageFrom,
+    messageText,
+    messageUnread,
+    formatMessage,
+
+    Conversation,
+    directMessageConversation,
+    reloadConversation,
+    lookupConversations,
+
+    conversationName,
+    conversationPeer,
+    conversationHistory,
+
+    sendMessage,
+) where
+
+import Control.Monad.Except
+
+import Data.List
+import Data.Maybe
+import Data.Text (Text)
+import Data.Text qualified as T
+import Data.Time.LocalTime
+
+import Erebos.Identity
+import Erebos.Message hiding (formatMessage)
+import Erebos.State
+import Erebos.Storage
+
+
+data Message = DirectMessageMessage DirectMessage Bool
+
+messageFrom :: Message -> ComposedIdentity
+messageFrom (DirectMessageMessage msg _) = msgFrom msg
+
+messageText :: Message -> Maybe Text
+messageText (DirectMessageMessage msg _) = Just $ msgText msg
+
+messageUnread :: Message -> Bool
+messageUnread (DirectMessageMessage _ unread) = unread
+
+formatMessage :: TimeZone -> Message -> String
+formatMessage tzone (DirectMessageMessage msg _) = formatDirectMessage tzone msg
+
+
+data Conversation = DirectMessageConversation DirectMessageThread
+
+directMessageConversation :: MonadHead LocalState m => ComposedIdentity -> m Conversation
+directMessageConversation peer = do
+    (find (sameIdentity peer . msgPeer) . toThreadList . lookupSharedValue . lsShared . fromStored <$> getLocalHead) >>= \case
+        Just thread -> return $ DirectMessageConversation thread
+        Nothing -> return $ DirectMessageConversation $ DirectMessageThread peer [] [] []
+
+reloadConversation :: MonadHead LocalState m => Conversation -> m Conversation
+reloadConversation (DirectMessageConversation thread) = directMessageConversation (msgPeer thread)
+
+lookupConversations :: MonadHead LocalState m => m [Conversation]
+lookupConversations = map DirectMessageConversation . toThreadList . lookupSharedValue . lsShared . fromStored <$> getLocalHead
+
+
+conversationName :: Conversation -> Text
+conversationName (DirectMessageConversation thread) = fromMaybe (T.pack "<unnamed>") $ idName $ msgPeer thread
+
+conversationPeer :: Conversation -> Maybe ComposedIdentity
+conversationPeer (DirectMessageConversation thread) = Just $ msgPeer thread
+
+conversationHistory :: Conversation -> [Message]
+conversationHistory (DirectMessageConversation thread) = map (\msg -> DirectMessageMessage msg False) $ threadToList thread
+
+
+sendMessage :: (MonadHead LocalState m, MonadError String m) => Conversation -> Text -> m Message
+sendMessage (DirectMessageConversation thread) text = DirectMessageMessage <$> (fromStored <$> sendDirectMessage (msgPeer thread) text) <*> pure False
-- 
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