Add new handling fro handling slides visibility (#9)

app/cells/decidim/slider/homepage/main/show.erb

@@ -9,10 +9,7 @@
 
             </div>
             <div class="orbit-container">
-              <% slides.each_with_index do |content_block, index| %>
-                <% next unless content_block.manifest %>
-                <%= cell content_block.manifest.cell, content_block, context: { index: index } %>
-              <% end %>
+              <%= cells.map(&:call) %>
             </div>
           </div>
           <nav class="orbit-bullets" aria-label="slider-navigation">
@@ -25,9 +22,8 @@
               <span class="show-for-sr" data-slide-active-label><%= t("decidim.slider.homepage.main.current_slide") %></span>
             </button>
 
-            <% (1...slides.size).to_a.each do |counter| %>
-              <button data-slide="<%= counter %>"><span class="show-for-sr"><%= t("decidim.slider.homepage.main.slide_details", count: 1+counter) %></span></button>
-            <% end %>
+            <%= cells.map(&:bullet).drop(1).join("\n") %>
+
             <a class="orbit-next"><span class="show-for-sr"><%= t("decidim.slider.homepage.main.next_slide") %></span>
               <%= icon "chevron-right", class: "icon--small", role: "img" %>
             </a>

app/cells/decidim/slider/homepage/main_cell.rb

@@ -14,8 +14,25 @@ def show
 
         private
 
+        def cells
+          return @cells if defined?(@cells)
+
+          @cells ||= []
+          index = 0
+          slides.each do |slide|
+            cl = cell(slide.manifest.cell, slide, context: { index: index })
+
+            next unless cl.renderable?
+
+            @cells.push(cl)
+            index += 1
+          end
+
+          @cells
+        end
+
         def has_slides?
-          slides.any?
+          cells.map(&:renderable?).any?
         end
 
         def slides

app/cells/decidim/slider/tabs/generic/main/bullet.erb

@@ -0,0 +1 @@
+<button data-slide="<%= index %>"><span class="show-for-sr"><%= t("decidim.slider.homepage.main.slide_details", count: 1+index) %></span></button>

app/cells/decidim/slider/tabs/generic/main_cell.rb

@@ -5,6 +5,18 @@ module Slider
     module Tabs
       module Generic
         class MainCell < Decidim::ViewModel
+          def bullet
+            return unless renderable?
+
+            render
+          end
+
+          def show
+            return unless renderable?
+
+            render
+          end
+
           def index
             context[:index]
           end
@@ -51,6 +63,18 @@ def cache_hash
             hash.push(model.cache_key_with_version)
             hash.join(Decidim.cache_key_separator)
           end
+
+          def asset
+            model.images_container.attached_uploader(uploader_name)
+          end
+
+          def renderable?
+            asset.attached?
+          end
+
+          def content_type
+            model.images_container.send(uploader_name).content_type
+          end
         end
       end
     end

app/cells/decidim/slider/tabs/image/main/show.erb

@@ -1,4 +1,4 @@
-<div class="<% if index.zero? %>is-active<% end %> orbit-slide">
+<div class="orbit-slide<% if index.zero? %> is-active<% end %>">
   <div class="row ">
     <div class="column orbit-figure">
       <div class="row small-up-1 smallmedium-up-2">

app/cells/decidim/slider/tabs/image/main_cell.rb

@@ -5,8 +5,12 @@ module Slider
     module Tabs
       module Image
         class MainCell < ::Decidim::Slider::Tabs::Generic::MainCell
+          def uploader_name
+            :image
+          end
+
           def image_url
-            model.images_container.attached_uploader(:image).path(variant: :big)
+            asset.path(variant: :big)
           end
         end
       end

app/cells/decidim/slider/tabs/video_text/main/show.erb

@@ -4,7 +4,7 @@
       <div class="row small-up-1 smallmedium-up-2">
         <div class="column text-center">
           <video aria-label="<%= accessibility_label %>" width="512" height="270" controls autoplay muted loop>
-            <source src="<%= video_url %>" type="<%= video_content_type %>">
+            <source src="<%= video_url %>" type="<%= content_type %>">
             Your browser does not support the video tag.
           </video>
         </div>

app/cells/decidim/slider/tabs/video_text/main_cell.rb

@@ -5,12 +5,12 @@ module Slider
     module Tabs
       module VideoText
         class MainCell < ::Decidim::Slider::Tabs::Generic::MainCell
-          def video_url
-            model.images_container.attached_uploader(:video).path
+          def uploader_name
+            :video
           end
 
-          def video_content_type
-            model.images_container.video.content_type
+          def video_url
+            asset.path
           end
         end
       end