email-digest: Update translated strings for stream to channel rename.

Updates the translated "New streams" string in the email digest to
instead by "New channels". Also, marks that for translation in the
plain text version of the email.

Updates the generated stream/channel url to use stream_narrow_url
in preparation for updating stream narrow urls for the rename.

Part of stream to channel rename project.

templates/zerver/emails/digest.html

@@ -23,10 +23,10 @@
         {% endfor %}
     {% endif %}
 
-    {% if new_streams.html %}
-    <p class="digest_paragraph"><b>{% trans %}New streams{% endtrans %}</b></p>
+    {% if new_channels.html %}
+    <p class="digest_paragraph"><b>{% trans %}New channels{% endtrans %}</b></p>
 
-    <p class="digest_paragraph">{{ new_streams.html|display_list(1000)|safe }}.</p>
+    <p class="digest_paragraph">{{ new_channels.html|display_list(1000)|safe }}.</p>
     {% endif %}
 
     <br />

templates/zerver/emails/digest.txt

@@ -5,8 +5,8 @@
 {% endfor %}{% endfor %}
 {% if convo.count > 0 %}+ {{ convo.count }} more message{{ convo.count|pluralize }} by {{ convo.participants|display_list(4) }}.{% endif %}{% endfor %}{% endfor %}{% endif %}
 
-{% if new_streams.plain %}** New streams **
-    {{ new_streams.plain|display_list(1000) }}.
+{% if new_channels.plain %}** {% trans %}New channels{% endtrans %} **
+    {{ new_channels.plain|display_list(1000) }}.
 {% endif %}
 
 {% trans organization_url=realm_uri %}Click here to log in to Zulip and catch up: {{ organization_url }}.{% endtrans %}

zerver/lib/digest.py

@@ -19,7 +19,7 @@ from zerver.lib.logging_util import log_to_file
 from zerver.lib.message import get_last_message_id
 from zerver.lib.queue import queue_json_publish
 from zerver.lib.send_email import FromAddress, send_future_email
-from zerver.lib.url_encoding import encode_stream
+from zerver.lib.url_encoding import stream_narrow_url
 from zerver.models import (
     Message,
     Realm,
@@ -255,18 +255,16 @@ def gather_new_streams(
     else:
         new_streams = [stream for stream in recently_created_streams if stream.is_web_public]
 
-    base_url = f"{realm.uri}/#narrow/stream/"
-
-    streams_html = []
-    streams_plain = []
+    channels_html = []
+    channels_plain = []
 
     for stream in new_streams:
-        narrow_url = base_url + encode_stream(stream.id, stream.name)
-        stream_link = f"<a href='{narrow_url}'>{stream.name}</a>"
-        streams_html.append(stream_link)
-        streams_plain.append(stream.name)
+        narrow_url = stream_narrow_url(realm, stream)
+        channel_link = f"<a href='{narrow_url}'>{stream.name}</a>"
+        channels_html.append(channel_link)
+        channels_plain.append(stream.name)
 
-    return len(new_streams), {"html": streams_html, "plain": streams_plain}
+    return len(new_streams), {"html": channels_html, "plain": channels_plain}
 
 
 def enough_traffic(hot_conversations: str, new_streams: int) -> bool:
@@ -376,7 +374,7 @@ def bulk_get_digest_context(
             recently_created_streams=recently_created_streams,
             can_access_public=user.can_access_public_streams(),
         )
-        context["new_streams"] = new_streams
+        context["new_channels"] = new_streams
         context["new_streams_count"] = new_streams_count
 
         yield user, context

zerver/tests/test_digest.py

@@ -186,7 +186,7 @@ class TestDigestEmailMessages(ZulipTestCase):
         kwargs = mock_send_future_email.call_args[1]
         self.assertEqual(kwargs["to_user_ids"], [polonius.id])
 
-        new_stream_names = kwargs["context"]["new_streams"]["plain"]
+        new_stream_names = kwargs["context"]["new_channels"]["plain"]
         self.assertTrue("web_public_stream" in new_stream_names)
 
     def test_no_logging(self) -> None: