Added a Recordings page where the user can see all recordings (#352)

app/helpers/recordings_helper.rb

@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+# BigBlueButton open source conferencing system - http://www.bigbluebutton.org/.
+#
+# Copyright (c) 2018 BigBlueButton Inc. and by respective authors (see below).
+#
+# This program is free software; you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free Software
+# Foundation; either version 3.0 of the License, or (at your option) any later
+# version.
+#
+# BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
+
+module RecordingsHelper
+  # Helper for converting BigBlueButton dates into the desired format.
+  def recording_date(date)
+    date.strftime("%B #{date.day.ordinalize}, %Y.")
+  end
+
+  # Helper for converting BigBlueButton dates into a nice length string.
+  def recording_length(playbacks)
+    # Stats format currently doesn't support length.
+    valid_playbacks = playbacks.reject { |p| p[:type] == "statistics" }
+    return "0 min" if valid_playbacks.empty?
+
+    len = valid_playbacks.first[:length]
+    if len > 60
+      "#{(len / 60).round} hrs"
+    elsif len == 0
+      "< 1 min"
+    else
+      "#{len} min"
+    end
+  end
+
+  # Prevents single images from erroring when not passed as an array.
+  def safe_recording_images(images)
+    Array.wrap(images)
+  end
+end