MM-10007 Send an admin and regular WS events when a user is updated (#8588)

* Add user.DeepCopy() function

* Add omit admins/non-admins to WS broadcast and use for updating users

* Updates per feedback and adding unit test for ShouldSendEvent

app/web_conn_test.go

@@ -0,0 +1,82 @@
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package app
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/mattermost/mattermost-server/model"
+	"github.com/mattermost/mattermost-server/utils"
+)
+
+func TestWebConnShouldSendEvent(t *testing.T) {
+	th := Setup().InitBasic().InitSystemAdmin()
+	defer th.TearDown()
+
+	session, err := th.App.CreateSession(&model.Session{UserId: th.BasicUser.Id, Roles: th.BasicUser.GetRawRoles()})
+	require.Nil(t, err)
+
+	basicUserWc := &WebConn{
+		App:    th.App,
+		UserId: th.BasicUser.Id,
+		T:      utils.T,
+	}
+
+	basicUserWc.SetSession(session)
+	basicUserWc.SetSessionToken(session.Token)
+	basicUserWc.SetSessionExpiresAt(session.ExpiresAt)
+
+	session2, err := th.App.CreateSession(&model.Session{UserId: th.BasicUser2.Id, Roles: th.BasicUser2.GetRawRoles()})
+	require.Nil(t, err)
+
+	basicUser2Wc := &WebConn{
+		App:    th.App,
+		UserId: th.BasicUser2.Id,
+		T:      utils.T,
+	}
+
+	basicUser2Wc.SetSession(session2)
+	basicUser2Wc.SetSessionToken(session2.Token)
+	basicUser2Wc.SetSessionExpiresAt(session2.ExpiresAt)
+
+	session3, err := th.App.CreateSession(&model.Session{UserId: th.SystemAdminUser.Id, Roles: th.SystemAdminUser.GetRawRoles()})
+	require.Nil(t, err)
+
+	adminUserWc := &WebConn{
+		App:    th.App,
+		UserId: th.SystemAdminUser.Id,
+		T:      utils.T,
+	}
+
+	adminUserWc.SetSession(session3)
+	adminUserWc.SetSessionToken(session3.Token)
+	adminUserWc.SetSessionExpiresAt(session3.ExpiresAt)
+
+	cases := []struct {
+		Description   string
+		Broadcast     *model.WebsocketBroadcast
+		User1Expected bool
+		User2Expected bool
+		AdminExpected bool
+	}{
+		{"should send to all", &model.WebsocketBroadcast{}, true, true, true},
+		{"should only send to basic user", &model.WebsocketBroadcast{UserId: th.BasicUser.Id}, true, false, false},
+		{"should omit basic user 2", &model.WebsocketBroadcast{OmitUsers: map[string]bool{th.BasicUser2.Id: true}}, true, false, true},
+		{"should only send to admin", &model.WebsocketBroadcast{ContainsSensitiveData: true}, false, false, true},
+		{"should only send to non-admins", &model.WebsocketBroadcast{ContainsSanitizedData: true}, true, true, false},
+		{"should send to nobody", &model.WebsocketBroadcast{ContainsSensitiveData: true, ContainsSanitizedData: true}, false, false, false},
+		// needs more cases to get full coverage
+	}
+
+	event := &model.WebSocketEvent{Event: "some_event"}
+	for _, c := range cases {
+		event.Broadcast = c.Broadcast
+		assert.Equal(t, c.User1Expected, basicUserWc.ShouldSendEvent(event), c.Description)
+		assert.Equal(t, c.User2Expected, basicUser2Wc.ShouldSendEvent(event), c.Description)
+		assert.Equal(t, c.AdminExpected, adminUserWc.ShouldSendEvent(event), c.Description)
+	}
+}