Add 'open today' sidebar widget and open days in chapter lists

- open_erfas_today helper: samples 3 random open-day-tagged occurrences
  of the current day; widget hidden entirely on days without open
  chapters; heading shows current weekday
- content/_open_erfas_today partial rendered in right column above
  tags and featured articles
- _chapter partial: open-day schedules (event_schedule_text) shown
  inline in aggregated chapter lists with 'Offene Tage' label
- ccc.css: open_erfas_today added to existing right-column widget
  selector groups (headings, lists, links)

7 files changed, 46 insertions, 5 deletions

diff --git a/app/helpers/content_helper.rb b/app/helpers/content_helper.rb
index 53bf5b2..bf7287f 100644
--- a/app/helpers/content_helper.rb
+++ b/app/helpers/content_helper.rb
@@ -23,6 +23,22 @@ module ContentHelper
     )
   end
 
+  def open_erfas_today
+    occurrences = Occurrence
+      .find_in_range(Time.now.beginning_of_day, Time.now.end_of_day)
+      .joins(event: :tags)
+      .where(tags: { name: 'open-day' })
+      .reject { |o| o.node.nil? || o.node.head.nil? }
+      .sample(3)
+
+    return if occurrences.empty?
+
+    render(
+      :partial => 'content/open_erfas_today',
+      :locals  => { :occurrences => occurrences }
+    )
+  end
+
   def tags
     render :partial => 'content/tags'
   end
diff --git a/app/views/content/_open_erfas_today.html.erb b/app/views/content/_open_erfas_today.html.erb
new file mode 100644
index 0000000..3448af3
--- /dev/null
+++ b/app/views/content/_open_erfas_today.html.erb
@@ -0,0 +1,11 @@
+<div id="open_erfas_today">
+  <h2><%= t(:open_today) %></h2>
+  <ul class="teasertext">
+    <% occurrences.each do |occurrence| %>
+      <li>
+        <%= link_to_path occurrence.node.head.title, occurrence.node.unique_name %>
+        <span class="event_time"><%= occurrence.start_time.strftime("%H:%M") %></span>
+      </li>
+    <% end %>
+  </ul>
+</div>
diff --git a/app/views/custom/partials/_chapter.html.erb b/app/views/custom/partials/_chapter.html.erb
index a5b8662..805559b 100644
--- a/app/views/custom/partials/_chapter.html.erb
+++ b/app/views/custom/partials/_chapter.html.erb
@@ -6,5 +6,14 @@
   <% if page.node.external_url.present? %>
     <div class="chapter_url"><%= link_to page.node.external_url, page.node.external_url, target: '_blank', rel: 'noopener' %></div>
   <% end %>
+  <% open_days = page.node.events.tagged_with('open-day').order(:start_time) %>
+  <% if open_days.any? %>
+    <div class="chapter_open_days">
+      <span class="open_days_label"><%= t(:open_days_label) %>: </span>
+      <% open_days.each do |event| %>
+        <span class="event_schedule"><%= event_schedule_text(event) %></span>
+      <% end %>
+    </div>
+  <% end %>
   <p class="excerpt"><%= sanitize page.body %></p>
 </div>
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index edab5fc..57d12e6 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -72,6 +72,7 @@
         </div>
       </div>
       <div id="right_column">
+        <%= open_erfas_today %>
         <%= tags %>
         <%= featured_articles %>
       </div>
diff --git a/config/locales/de.yml b/config/locales/de.yml
index 9719a1c..e8ae4e1 100644
--- a/config/locales/de.yml
+++ b/config/locales/de.yml
@@ -11,7 +11,9 @@ de:
   event_schedule_unrecognized: "Termin-Regel nicht automatisch lesbar"
   event_schedule_none: "Kein Termin"
   open_days: "Offene Tage"
+  open_days_label: "Offene Tage"
   upcoming_events: "Weitere Termine"
+  open_today: "Heute dabei"
   date:
     formats:
       default: "%d.%m.%Y"
diff --git a/config/locales/en.yml b/config/locales/en.yml
index aa477f0..980a6b8 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -12,7 +12,9 @@ en:
   event_schedule_unrecognized: "Schedule not automatically readable"
   event_schedule_none: "No schedule"
   open_days: "Open days"
+  open_days_label: "Open days"
   upcoming_events: "Upcoming events"
+  open_today: "Open today"
 
   time:
     formats:
diff --git a/public/stylesheets/ccc.css b/public/stylesheets/ccc.css
index 30eb8dd..422b7c0 100644
--- a/public/stylesheets/ccc.css
+++ b/public/stylesheets/ccc.css
@@ -216,7 +216,7 @@ div#frontpage_calendar {
   }
 }
 
-div#frontpage_calendar h2, div#tags h2, div#featured_articles h2, div.main_navigation h2 {
+div#frontpage_calendar h2, div#tags h2, div#featured_articles h2, div#open_erfas_today h2, div.main_navigation h2 {
   border-top: 2px solid;
   border-bottom: 2px solid;
   font-size: 1.1em;
@@ -248,7 +248,7 @@ div#frontpage_calendar h2 {
 }
 
 @media(min-width:1016px) {
-  div#frontpage_calendar h2, div#tags h2, div#featured_articles h2 {
+  div#frontpage_calendar h2, div#tags h2, div#featured_articles h2, div#open_erfas_today h2 {
     font-size: 1rem;
   }
 
@@ -260,7 +260,7 @@ div#frontpage_calendar h2 {
 
 }
 
-div#frontpage_calendar ul, div#tags ul, div#featured_articles ul {
+div#frontpage_calendar ul, div#tags ul, div#featured_articles ul, div#open_erfas_today ul {
   padding: 0px;
   font-size: 1rem;
   line-height: 1.5em;
@@ -278,11 +278,11 @@ div#frontpage_calendar li {
   margin-bottom: 20px;
 }
 
-div#frontpage_calendar li, div#tags li, div#featured_articles li {
+div#frontpage_calendar li, div#tags li, div#featured_articles li, div#open_erfas_today li {
   list-style-type: none;
 }
 
-div#frontpage_calendar li a, div#tags li a, div#featured_articles li a {
+div#frontpage_calendar li a, div#tags li a, div#featured_articles li a, div#open_erfas_today li a {
   text-decoration: none;
   color: color-mix(in srgb, CanvasText, #808080 25%);
 }