Add intro widget to listing chooser with sample multireddits.

r2/example.ini

@@ -526,6 +526,9 @@ wiki_page_registration_info = registration_info
 # Template names to record render timings for
 timed_templates = Reddit, Link, Comment, LinkListing, NestedListing, SubredditTopBar
 
+# sample multireddits (displayed when a user has no multis)
+sample_multis = /user/reddit/m/hello, /user/reddit/m/world
+
 [server:main]
 use = egg:Paste#http
 host = 0.0.0.0

r2/r2/lib/app_globals.py

@@ -186,6 +186,7 @@ class Globals(object):
             'TRAFFIC_LOG_HOSTS',
             'exempt_login_user_agents',
             'timed_templates',
+            'sample_multis',
         ],
 
         ConfigValue.str: [

r2/r2/lib/pages/pages.py

@@ -4104,13 +4104,20 @@ class ListingChooser(Templated):
         if c.show_mod_mail:
             self.add_item("other", _("moderating"), site=Mod,
                           description=_("subreddits you mod"))
+
         self.add_item("other", _("saved"), path='/user/%s/saved' % c.user.name)
 
+        self.show_samples = False
         if c.user_is_loggedin:
             multis = LabeledMulti.by_owner(c.user)
             multis.sort(key=lambda multi: multi.name.lower())
             for multi in multis:
                 self.add_item("multi", multi.name, site=multi)
+            self.show_samples = not multis
+
+        if self.show_samples:
+            self.add_samples()
+
         self.selected_item = self.find_selected()
         if self.selected_item:
             self.selected_item["selected"] = True
@@ -4124,6 +4131,14 @@ class ListingChooser(Templated):
             "selected": False,
         })
 
+    def add_samples(self):
+        for path in g.sample_multis:
+            self.add_item(
+                section="sample",
+                name=path.rpartition('/')[2],
+                path=path,
+            )
+
     def find_selected(self):
         path = request.path
         matching = []

r2/r2/public/static/css/reddit.less

@@ -7022,6 +7022,24 @@ body.with-listing-chooser {
         padding: 4px;
     }
 
+    .intro {
+        background: lighten(#f6e69f, 5%);
+        border: 1px solid lighten(orange, 5%);
+        border-left: none;
+        border-right: none;
+        margin-bottom: 10px;
+
+        p {
+            font-size: 1.15em;
+            margin: 4px;
+            margin-left: 8px;
+        }
+
+        ul.multis {
+            margin: 6px 0;
+        }
+    }
+
     ul.global, ul.other {
         padding: 8px 0;
         li {

r2/r2/templates/listingchooser.html

@@ -43,6 +43,15 @@
   </ul>
 
   <h3>${_('multireddits')}</h3>
+  %if thing.show_samples:
+    <div class="intro">
+      <p>${_('new! create sets of subreddits to view together.')}</p>
+      <p>${_('for starters, try one of these:')}</p>
+      <ul class="multis">
+        ${section_items(thing.sections['sample'])}
+      </ul>
+    </div>
+  %endif
   <ul class="multis">
     ${section_items(thing.sections['multi'])}
     <li class="create">