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18 changes: 10 additions & 8 deletions src/webview/html/header.js
Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,11 @@ import {
} from '../../utils/narrow';
import { foregroundColorFromBackground } from '../../utils/color';
import { humanDate } from '../../utils/date';
import { pmUiRecipientsFromMessage, pmKeyRecipientsFromMessage } from '../../utils/recipient';
import {
pmUiRecipientsFromMessage,
pmKeyRecipientsFromMessage,
streamNameOfStreamMessage,
} from '../../utils/recipient';
import { base64Utf8Encode } from '../../utils/encoding';

const renderSubject = message =>
Expand All @@ -28,16 +32,14 @@ const renderSubject = message =>
* This is a private helper of messageListElementHtml.
*/
export default (
{ ownUser, streams, subscriptions }: BackgroundData,
{ ownUser, subscriptions }: BackgroundData,
element: HeaderMessageListElement,
): string => {
const { subsequentMessage: message, style: headerStyle } = element;

if (message.type === 'stream') {
const stream = streams.get(message.stream_id);
invariant(stream, 'stream should exist for message');

const topicNarrowStr = keyFromNarrow(topicNarrow(stream.name, message.subject));
const streamName = streamNameOfStreamMessage(message);
const topicNarrowStr = keyFromNarrow(topicNarrow(streamName, message.subject));
const topicHtml = renderSubject(message);

if (headerStyle === 'topic+date') {
Expand All @@ -55,7 +57,7 @@ export default (
const subscription = subscriptions.get(message.stream_id);
const backgroundColor = subscription ? subscription.color : 'hsl(0, 0%, 80%)';
const textColor = foregroundColorFromBackground(backgroundColor);
const streamNarrowStr = keyFromNarrow(streamNarrow(stream.name));
const streamNarrowStr = keyFromNarrow(streamNarrow(streamName));

return template`
<div class="msglist-element header-wrapper header stream-header topic-header"
Expand All @@ -65,7 +67,7 @@ export default (
style="color: ${textColor};
background: ${backgroundColor}"
data-narrow="${base64Utf8Encode(streamNarrowStr)}">
# ${stream.name}
# ${streamName}
</div>
<div class="topic-text">$!${topicHtml}</div>
<div class="topic-date">${humanDate(new Date(message.timestamp * 1000))}</div>
Expand Down