Moves parts of conversation view into redux

ts/util/removePendingMember.ts

@@ -0,0 +1,42 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { ConversationAttributesType } from '../model-types.d';
+import type { SignalService as Proto } from '../protobuf';
+import type { UUID } from '../types/UUID';
+import * as log from '../logging/log';
+import { getConversationIdForLogging } from './idForLogging';
+import { isMemberPending } from './isMemberPending';
+import { isNotNil } from './isNotNil';
+
+export async function removePendingMember(
+  conversationAttributes: ConversationAttributesType,
+  uuids: ReadonlyArray<UUID>
+): Promise<Proto.GroupChange.Actions | undefined> {
+  const idLog = getConversationIdForLogging(conversationAttributes);
+
+  const pendingUuids = uuids
+    .map(uuid => {
+      // This user's pending state may have changed in the time between the user's
+      //   button press and when we get here. It's especially important to check here
+      //   in conflict/retry cases.
+      if (!isMemberPending(conversationAttributes, uuid)) {
+        log.warn(
+          `removePendingMember/${idLog}: ${uuid} is not a pending member of group. Returning early.`
+        );
+        return undefined;
+      }
+
+      return uuid;
+    })
+    .filter(isNotNil);
+
+  if (!uuids.length) {
+    return undefined;
+  }
+
+  return window.Signal.Groups.buildDeletePendingMemberChange({
+    group: conversationAttributes,
+    uuids: pendingUuids,
+  });
+}