From 8627123143e70ada1fa50566a665b48e6bd224af Mon Sep 17 00:00:00 2001
From: Danila Fedorin <danila.fedorin@gmail.com>
Date: Wed, 11 Sep 2019 01:07:39 -0700
Subject: [PATCH] Remove all the merging code from Sync

---
 src/Scylla/Sync.elm | 119 --------------------------------------------
 1 file changed, 119 deletions(-)

diff --git a/src/Scylla/Sync.elm b/src/Scylla/Sync.elm
index 064a7f4..cc3227b 100644
--- a/src/Scylla/Sync.elm
+++ b/src/Scylla/Sync.elm
@@ -58,125 +58,6 @@ findFirstEvent = findFirstBy .originServerTs
 findLastEvent : ({ a | originServerTs : Int } -> Bool) -> List { a | originServerTs : Int } -> Maybe { a | originServerTs : Int }
 findLastEvent = findLastBy .originServerTs
 
--- Business Logic: Merging
-mergeMaybe : (a -> a -> a) -> Maybe a -> Maybe a -> Maybe a
-mergeMaybe f l r = case (l, r) of
-    (Just v1, Just v2) -> Just <| f v1 v2
-    (Just v, Nothing) -> l
-    (Nothing, Just v) -> r
-    _ -> Nothing
-
-mergeEvents : List Event -> List Event -> List Event
-mergeEvents l1 l2 = l1 ++ l2
-
-mergeStateEvents : List StateEvent -> List StateEvent -> List StateEvent
-mergeStateEvents l1 l2 = uniqueBy .eventId <| l1 ++ l2
-
-mergeRoomEvents : List RoomEvent -> List RoomEvent -> List RoomEvent
-mergeRoomEvents l1 l2 = uniqueBy getEventId <| l1 ++ l2
-
-mergeStrippedStates : List StrippedStateEvent -> List StrippedStateEvent -> List StrippedStateEvent
-mergeStrippedStates l1 l2 = l1 ++ l2
-
-mergeAccountData : AccountData -> AccountData -> AccountData
-mergeAccountData a1 a2 = AccountData <| mergeMaybe mergeEvents a1.events a2.events
-
-mergePresence : Presence -> Presence -> Presence
-mergePresence p1 p2 = Presence <| mergeMaybe mergeEvents p1.events p2.events
-
-mergeDicts : (b -> b -> b) -> Dict comparable b -> Dict comparable b -> Dict comparable b
-mergeDicts f d1 d2 =
-    let
-        inOne = Dict.insert
-        inBoth k v1 v2 = Dict.insert k (f v1 v2)
-    in
-        Dict.merge inOne inBoth inOne d1 d2 (Dict.empty)
-
-mergeState : State -> State -> State
-mergeState s1 s2 = State <| mergeMaybe mergeStateEvents s1.events s2.events
-
-mergeTimeline : Timeline -> Timeline -> Timeline
-mergeTimeline t1 t2 = Timeline (mergeMaybe mergeRoomEvents t1.events t2.events) Nothing t1.prevBatch
-
-mergeEphemeral : Ephemeral -> Ephemeral -> Ephemeral
-mergeEphemeral e1 e2 = Ephemeral <| mergeMaybe mergeEvents e1.events e2.events
-
-mergeJoinedRoom : JoinedRoom -> JoinedRoom -> JoinedRoom
-mergeJoinedRoom r1 r2 =
-    { r2 | state = mergeMaybe mergeState r1.state r2.state
-    , timeline = mergeMaybe mergeTimeline r1.timeline r2.timeline
-    , accountData = mergeMaybe mergeAccountData r1.accountData r2.accountData
-    , ephemeral = mergeMaybe mergeEphemeral r1.ephemeral r2.ephemeral
-    }
-
-mergeInviteState : InviteState -> InviteState -> InviteState 
-mergeInviteState i1 i2 = InviteState <| mergeMaybe mergeStrippedStates i1.events i2.events
-
-mergeInvitedRoom : InvitedRoom -> InvitedRoom -> InvitedRoom
-mergeInvitedRoom i1 i2 = InvitedRoom <| mergeMaybe mergeInviteState i1.inviteState i2.inviteState
-
-mergeLeftRoom : LeftRoom -> LeftRoom -> LeftRoom
-mergeLeftRoom l1 l2 = LeftRoom
-    (mergeMaybe mergeState l1.state l2.state)
-    (mergeMaybe mergeTimeline l1.timeline l2.timeline)
-    (mergeMaybe mergeAccountData l1.accountData l2.accountData)
-
-mergeJoin : Dict String JoinedRoom -> Dict String JoinedRoom -> Dict String JoinedRoom
-mergeJoin = mergeDicts mergeJoinedRoom
-
-mergeInvite : Dict String InvitedRoom -> Dict String InvitedRoom -> Dict String InvitedRoom
-mergeInvite = mergeDicts mergeInvitedRoom
-
-mergeLeave : Dict String LeftRoom -> Dict String LeftRoom -> Dict String LeftRoom
-mergeLeave = mergeDicts mergeLeftRoom
-
-mergeRooms : Rooms -> Rooms -> Rooms
-mergeRooms r1 r2 =
-    { join = mergeMaybe mergeJoin r1.join r2.join
-    , invite = mergeMaybe mergeInvite r1.invite r2.invite
-    , leave = mergeMaybe mergeLeave r1.leave r2.leave
-    }
-
-mergeSyncResponse : SyncResponse -> SyncResponse -> SyncResponse
-mergeSyncResponse l r = 
-    { r | rooms = mergeMaybe mergeRooms l.rooms r.rooms
-    , accountData = mergeMaybe mergeAccountData l.accountData r.accountData
-    }
-
-appendRoomHistoryResponse : JoinedRoom -> HistoryResponse -> JoinedRoom
-appendRoomHistoryResponse jr hr =
-    let
-        oldEvents = Maybe.withDefault [] <| Maybe.andThen .events jr.timeline
-        newEvents = mergeRoomEvents (List.reverse hr.chunk) oldEvents
-        newTimeline = case jr.timeline of
-            Just t -> Just { t | events = Just newEvents, prevBatch = Just hr.end }
-            Nothing -> Just { events = Just newEvents, prevBatch = Just hr.end, limited = Nothing }
-    in
-        { jr | timeline = newTimeline }
-
-appendHistoryResponse : SyncResponse -> RoomId -> HistoryResponse -> SyncResponse
-appendHistoryResponse sr r hr =
-    let
-        appendMaybeRoomHistoryResponse mr = Just <| case mr of
-            Just jr -> appendRoomHistoryResponse jr hr
-            Nothing ->
-                { state = Nothing
-                , timeline = Just
-                    { events = Just hr.chunk
-                    , limited = Nothing
-                    , prevBatch = Just hr.end
-                    }
-                , ephemeral = Nothing
-                , accountData = Nothing
-                , unreadNotifications = Nothing
-                }
-        newRooms = Just <| case sr.rooms of
-            Just rs -> { rs | join = newJoin rs.join }
-            Nothing -> { join = newJoin Nothing, leave = Nothing, invite = Nothing }
-        newJoin j = Maybe.map (Dict.update r appendMaybeRoomHistoryResponse) j
-    in
-        { sr | rooms = newRooms }
-
 -- Business Logic: Names
 homeserver : String -> String
 homeserver s =