HTML: Add code to generate page nav buttons

src/invidious/frontend/pagination.cr

@@ -0,0 +1,97 @@
+require "uri"
+
+module Invidious::Frontend::Pagination
+  extend self
+
+  private def previous_page(str : String::Builder, locale : String?, url : String)
+    # Link
+    str << %(<a href=") << url << %(" class="pure-button pure-button-secondary">)
+
+    if locale_is_rtl?(locale)
+      # Inverted arrow ("previous" points to the right)
+      str << translate(locale, "Previous page")
+      str << "&nbsp;&nbsp;"
+      str << %(<i class="icon ion-ios-arrow-forward"></i>)
+    else
+      # Regular arrow ("previous" points to the left)
+      str << %(<i class="icon ion-ios-arrow-back"></i>)
+      str << "&nbsp;&nbsp;"
+      str << translate(locale, "Previous page")
+    end
+
+    str << "</a>"
+  end
+
+  private def next_page(str : String::Builder, locale : String?, url : String)
+    # Link
+    str << %(<a href=") << url << %(" class="pure-button pure-button-secondary">)
+
+    if locale_is_rtl?(locale)
+      # Inverted arrow ("next" points to the left)
+      str << %(<i class="icon ion-ios-arrow-back"></i>)
+      str << "&nbsp;&nbsp;"
+      str << translate(locale, "Next page")
+    else
+      # Regular arrow ("next" points to the right)
+      str << translate(locale, "Next page")
+      str << "&nbsp;&nbsp;"
+      str << %(<i class="icon ion-ios-arrow-forward"></i>)
+    end
+
+    str << "</a>"
+  end
+
+  def nav_numeric(locale : String?, *, base_url : String | URI, current_page : Int, show_next : Bool = true)
+    return String.build do |str|
+      str << %(<div class="h-box">\n)
+      str << %(<div class="page-nav-container flexible">\n)
+
+      str << %(<div class="page-prev-container flex-left">)
+
+      if current_page > 1
+        params_prev = URI::Params{"page" => (current_page - 1).to_s}
+        url_prev = HttpServer::Utils.add_params_to_url(base_url, params_prev)
+
+        self.previous_page(str, locale, url_prev.to_s)
+      end
+
+      str << %(</div>\n)
+      str << %(<div class="page-next-container flex-right">)
+
+      if show_next
+        params_next = URI::Params{"page" => (current_page + 1).to_s}
+        url_next = HttpServer::Utils.add_params_to_url(base_url, params_next)
+
+        self.next_page(str, locale, url_next.to_s)
+      end
+
+      str << %(</div>\n)
+
+      str << %(</div>\n)
+      str << %(</div>\n\n)
+    end
+  end
+
+  def nav_ctoken(locale : String?, *, base_url : String | URI, ctoken : String?)
+    return String.build do |str|
+      str << %(<div class="h-box">\n)
+      str << %(<div class="page-nav-container flexible">\n)
+
+      str << %(<div class="page-prev-container flex-left"></div>\n)
+
+      str << %(<div class="page-next-container flex-right">)
+
+      if !ctoken.nil?
+        params_next = URI::Params{"continuation" => ctoken}
+        url_next = HttpServer::Utils.add_params_to_url(base_url, params_next)
+
+        self.next_page(str, locale, url_next.to_s)
+      end
+
+      str << %(</div>\n)
+
+      str << %(</div>\n)
+      str << %(</div>\n\n)
+    end
+  end
+end