Save preset events when creating room

lib/matrix_server/event.ex

@@ -3,7 +3,7 @@ defmodule MatrixServer.Event do
 
   import Ecto.Query
 
-  alias MatrixServer.{Repo, Room, Event}
+  alias MatrixServer.{Repo, Room, Event, Account}
 
   @primary_key {:event_id, :string, []}
   schema "events" do
@@ -17,10 +17,10 @@ defmodule MatrixServer.Event do
     belongs_to :room, Room, type: :string
   end
 
-  def new(%Room{id: room_id}, sender) do
+  def new(%Room{id: room_id}, %Account{localpart: localpart}) do
     %Event{
       room_id: room_id,
-      sender: sender,
+      sender: MatrixServer.get_mxid(localpart),
       event_id: generate_event_id(),
       origin_server_ts: DateTime.utc_now() |> DateTime.to_unix(),
       prev_events: [],
@@ -28,30 +28,36 @@ defmodule MatrixServer.Event do
     }
   end
 
-  def create_room(room, creator, room_version) do
+  def create_room(room, %Account{localpart: localpart} = creator, room_version) do
+    mxid = MatrixServer.get_mxid(localpart)
+
     %Event{
       new(room, creator)
       | type: "m.room.create",
         state_key: "",
         content: %{
-          "creator" => creator,
+          "creator" => mxid,
           "room_version" => room_version || MatrixServer.default_room_version()
         }
     }
   end
 
-  def join(room, sender) do
+  def join(room, %Account{localpart: localpart} = sender) do
+    mxid = MatrixServer.get_mxid(localpart)
+
     %Event{
       new(room, sender)
       | type: "m.room.member",
-        state_key: sender,
+        state_key: mxid,
         content: %{
           "membership" => "join"
         }
     }
   end
 
-  def power_levels(room, sender) do
+  def power_levels(room, %Account{localpart: localpart} = sender) do
+    mxid = MatrixServer.get_mxid(localpart)
+
     %Event{
       new(room, sender)
       | type: "m.room.power_levels",
@@ -65,7 +71,7 @@ defmodule MatrixServer.Event do
           "redact" => 50,
           "state_default" => 50,
           "users" => %{
-            sender => 50
+            mxid => 50
           },
           "users_default" => 0,
           "notifications" => %{
@@ -97,6 +103,39 @@ defmodule MatrixServer.Event do
     }
   end
 
+  def join_rules(room, sender, join_rule) do
+    %Event{
+      new(room, sender)
+      | type: "m.room.join_rules",
+        state_key: "",
+        content: %{
+          "join_rule" => join_rule
+        }
+    }
+  end
+
+  def history_visibility(room, sender, history_visibility) do
+    %Event{
+      new(room, sender)
+      | type: "m.room.history_visibility",
+        state_key: "",
+        content: %{
+          "history_visibility" => history_visibility
+        }
+    }
+  end
+
+  def guest_access(room, sender, guest_access) do
+    %Event{
+      new(room, sender)
+      | type: "m.room.guest_access",
+        state_key: "",
+        content: %{
+          "guest_access" => guest_access
+        }
+    }
+  end
+
   def generate_event_id do
     "$" <> MatrixServer.random_string(17) <> ":" <> MatrixServer.server_name()
   end
@@ -122,15 +161,13 @@ defmodule MatrixServer.Event do
   # We assume that required keys, as well as in the content, is already validated.
 
   # Rule 1.4 is left to changeset validation.
-  def prevalidate(
-        %Event{
-          type: "m.room.create",
-          prev_events: prev_events,
-          auth_events: auth_events,
-          room_id: room_id,
-          sender: sender
-        } = event
-      ) do
+  def prevalidate(%Event{
+        type: "m.room.create",
+        prev_events: prev_events,
+        auth_events: auth_events,
+        room_id: room_id,
+        sender: sender
+      }) do
     # TODO: error check on domains?
     # TODO: rule 1.3
 

lib/matrix_server/room_server.ex

@@ -45,6 +45,12 @@ defmodule MatrixServer.RoomServer do
                state_set,
                [create_room_id, join_creator_id]
              ),
+           {:ok, _, state_set, room} <-
+             room_creation_preset(account, input, room, state_set, [
+               create_room_id,
+               join_creator_id,
+               pl_id
+             ]),
            {:ok, _, state_set, room} <-
              room_creation_name(account, input, room, state_set, [
                create_room_id,
@@ -64,33 +70,74 @@ defmodule MatrixServer.RoomServer do
     end)
   end
 
-  defp room_creation_create_room(
-         %Account{localpart: localpart},
-         %CreateRoom{room_version: room_version},
-         room
-       ) do
-    Event.create_room(room, MatrixServer.get_mxid(localpart), room_version)
+  defp room_creation_create_room(account, %CreateRoom{room_version: room_version}, room) do
+    Event.create_room(room, account, room_version)
     |> verify_and_insert_event(%{}, room)
   end
 
-  defp room_creation_join_creator(
-         %Account{localpart: localpart},
-         room,
-         state_set,
-         auth_events
-       ) do
-    Event.join(room, MatrixServer.get_mxid(localpart))
+  defp room_creation_join_creator(account, room, state_set, auth_events) do
+    Event.join(room, account)
     |> Map.put(:auth_events, auth_events)
     |> verify_and_insert_event(state_set, room)
   end
 
-  defp room_creation_power_levels(
-         %Account{localpart: localpart},
-         room,
+  defp room_creation_power_levels(account, room, state_set, auth_events) do
+    Event.power_levels(room, account)
+    |> Map.put(:auth_events, auth_events)
+    |> verify_and_insert_event(state_set, room)
+  end
+
+  # TODO: trusted_private_chat:
+  # All invitees are given the same power level as the room creator.
+  defp room_creation_preset(
+         account,
+         %CreateRoom{preset: nil},
+         %Room{visibility: visibility} = room,
          state_set,
          auth_events
        ) do
-    Event.power_levels(room, MatrixServer.get_mxid(localpart))
+    preset =
+      case visibility do
+        :public -> "public_chat"
+        :private -> "private_chat"
+      end
+
+    room_creation_preset(account, preset, room, state_set, auth_events)
+  end
+
+  defp room_creation_preset(account, %CreateRoom{preset: preset}, room, state_set, auth_events) do
+    room_creation_preset(account, preset, room, state_set, auth_events)
+  end
+
+  defp room_creation_preset(account, preset, room, state_set, auth_events) do
+    {join_rule, his_vis, guest_access} =
+      case preset do
+        "private_chat" -> {"invite", "shared", "can_join"}
+        "trusted_private_chat" -> {"invite", "shared", "can_join"}
+        "public_chat" -> {"public", "shared", "forbidden"}
+      end
+
+    with {:ok, _, _, _} <-
+           room_creation_join_rules(account, join_rule, room, state_set, auth_events),
+         {:ok, _, _, _} <- room_creation_his_vis(account, his_vis, room, state_set, auth_events) do
+      room_creation_guest_access(account, guest_access, room, state_set, auth_events)
+    end
+  end
+
+  defp room_creation_join_rules(account, join_rule, room, state_set, auth_events) do
+    Event.join_rules(room, account, join_rule)
+    |> Map.put(:auth_events, auth_events)
+    |> verify_and_insert_event(state_set, room)
+  end
+
+  defp room_creation_his_vis(account, his_vis, room, state_set, auth_events) do
+    Event.history_visibility(room, account, his_vis)
+    |> Map.put(:auth_events, auth_events)
+    |> verify_and_insert_event(state_set, room)
+  end
+
+  defp room_creation_guest_access(account, guest_access, room, state_set, auth_events) do
+    Event.guest_access(room, account, guest_access)
     |> Map.put(:auth_events, auth_events)
     |> verify_and_insert_event(state_set, room)
   end
@@ -99,14 +146,8 @@ defmodule MatrixServer.RoomServer do
     {:ok, nil, state_set, room}
   end
 
-  defp room_creation_name(
-         %Account{localpart: localpart},
-         %CreateRoom{name: name},
-         room,
-         state_set,
-         auth_events
-       ) do
-    Event.name(room, MatrixServer.get_mxid(localpart), name)
+  defp room_creation_name(account, %CreateRoom{name: name}, room, state_set, auth_events) do
+    Event.name(room, account, name)
     |> Map.put(:auth_events, auth_events)
     |> verify_and_insert_event(state_set, room)
   end
@@ -115,14 +156,8 @@ defmodule MatrixServer.RoomServer do
     {:ok, nil, state_set, room}
   end
 
-  defp room_creation_topic(
-         %Account{localpart: localpart},
-         %CreateRoom{topic: topic},
-         room,
-         state_set,
-         auth_events
-       ) do
-    Event.topic(room, MatrixServer.get_mxid(localpart), topic)
+  defp room_creation_topic(account, %CreateRoom{topic: topic}, room, state_set, auth_events) do
+    Event.topic(room, account, topic)
     |> Map.put(:auth_events, auth_events)
     |> verify_and_insert_event(state_set, room)
   end

lib/matrix_server_web/api/create_room.ex

@@ -13,14 +13,24 @@ defmodule MatrixServerWeb.API.CreateRoom do
     field :topic, :string
     field :invite, {:array, :string}
     field :room_version, :string
+    field :preset, :string
     # TODO: unimplemented:
-    # creation_content, initial_state, invite_3pid, initial_state, preset,
+    # creation_content, initial_state, invite_3pid, initial_state,
     # is_direct, power_level_content_override
   end
 
   def changeset(params) do
     %__MODULE__{}
-    |> cast(params, [:visibility, :room_alias_name, :name, :topic, :invite, :room_version])
+    |> cast(params, [
+      :visibility,
+      :room_alias_name,
+      :name,
+      :topic,
+      :invite,
+      :room_version,
+      :preset
+    ])
+    |> validate_inclusion(:preset, ["private_chat", "public_chat", "trusted_private_chat"])
   end
 
   def get_error(%Changeset{errors: [error | _]}), do: get_error(error)

priv/repo/seeds.exs

@@ -14,6 +14,24 @@ Repo.insert(%Device{
 # Auth difference example from here:
 # https://matrix.org/docs/guides/implementing-stateres#auth-differences
 
+alice =
+  Repo.insert!(%Account{
+    localpart: "alice",
+    password_hash: Bcrypt.hash_pwd_salt("sneed")
+  })
+
+bob =
+  Repo.insert!(%Account{
+    localpart: "bob",
+    password_hash: Bcrypt.hash_pwd_salt("sneed")
+  })
+
+charlie =
+  Repo.insert!(%Account{
+    localpart: "charlie",
+    password_hash: Bcrypt.hash_pwd_salt("sneed")
+  })
+
 room =
   Repo.insert!(%Room{
     id: "room1",
@@ -21,13 +39,13 @@ room =
   })
 
 Repo.insert!(
-  Event.create_room(room, "alice", "v1")
+  Event.create_room(room, alice, "v1")
   |> Map.put(:origin_server_ts, 0)
   |> Map.put(:event_id, "create")
 )
 
 Repo.insert!(
-  Event.join(room, "alice")
+  Event.join(room, alice)
   |> Map.put(:prev_events, ["create"])
   |> Map.put(:auth_events, ["create"])
   |> Map.put(:origin_server_ts, 1)
@@ -35,7 +53,7 @@ Repo.insert!(
 )
 
 Repo.insert!(
-  Event.join(room, "bob")
+  Event.join(room, bob)
   |> Map.put(:prev_events, ["join_alice"])
   |> Map.put(:auth_events, ["create"])
   |> Map.put(:origin_server_ts, 2)
@@ -43,14 +61,14 @@ Repo.insert!(
 )
 
 Repo.insert!(
-  Event.join(room, "charlie")
+  Event.join(room, charlie)
   |> Map.put(:prev_events, ["join_bob"])
   |> Map.put(:auth_events, ["create"])
   |> Map.put(:origin_server_ts, 3)
   |> Map.put(:event_id, "join_charlie")
 )
 
-%Event{content: content} = event = Event.power_levels(room, "alice")
+%Event{content: content} = event = Event.power_levels(room, alice)
 event = %Event{event | content: %{content | "users" => %{"alice" => 100, "bob" => 100}}}
 
 Repo.insert!(
@@ -61,7 +79,7 @@ Repo.insert!(
   |> Map.put(:event_id, "a")
 )
 
-%Event{content: content} = event = Event.power_levels(room, "bob")
+%Event{content: content} = event = Event.power_levels(room, bob)
 
 event = %Event{
   event
@@ -77,7 +95,7 @@ Repo.insert!(
 )
 
 Repo.insert!(
-  Event.topic(room, "alice", "sneed")
+  Event.topic(room, alice, "sneed")
   |> Map.put(:prev_events, ["a"])
   |> Map.put(:auth_events, ["create", "join_alice", "a"])
   |> Map.put(:origin_server_ts, 5)