1 files changed, 86 insertions, 0 deletions
diff --git a/lib/polyjuice/client/endpoint/post_join.ex b/lib/polyjuice/client/endpoint/post_join.ex
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+++ b/lib/polyjuice/client/endpoint/post_join.ex
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+# Copyright 2019 Hubert Chathi <hubert@uhoreg.ca>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+defmodule Polyjuice.Client.Endpoint.PostJoin do
+  @moduledoc """
+  Join a room.
+
+  https://matrix.org/docs/spec/client_server/r0.5.0#post-matrix-client-r0-join-roomidoralias
+  """
+
+  @type t :: %__MODULE__{
+          room: String.t(),
+          servers: [String.t()],
+          third_party_signed: map | nil
+        }
+
+  @enforce_keys [:room]
+  defstruct [
+    :room,
+    :third_party_signed,
+    servers: []
+  ]
+
+  defimpl Polyjuice.Client.Endpoint.Proto do
+    def http_spec(
+          %{
+            room: room,
+            servers: servers,
+            third_party_signed: third_party_signed
+          },
+          base_url
+        ) do
+      e = &URI.encode_www_form/1
+      body = Poison.encode!(
+        if third_party_signed do
+          %{"third_party_signed" => third_party_signed}
+        else
+          %{}
+        end
+      )
+
+      url = %{
+        URI.merge(
+          base_url,
+          "#{Polyjuice.Client.prefix_r0()}/join/#{e.(room)}"
+        ) | query: if servers == [] do
+          nil
+        else
+          Enum.join(Enum.map(servers, &("server_name=#{e.(&1)}")), "&")
+        end
+      }
+
+      %Polyjuice.Client.Endpoint.HttpSpec{
+        method: :post,
+        headers: [
+          {"Accept", "application/json"},
+          {"Content-Type", "application/json"}
+        ],
+        url: to_string(url),
+        body: body,
+        transform: &Polyjuice.Client.Endpoint.PostJoin.transform/3
+      }
+    end
+  end
+
+  def transform(status_code, _resp_headers, body) do
+    case status_code do
+      200 ->
+        {:ok, body |> Poison.decode!() |> Map.get("room_id")}
+
+      _ ->
+        {:error, status_code, body}
+    end
+  end
+end