Minor - plugin zoom fix php notices, format code, add lang vars

plugin/zoom/lang/english.php

@@ -134,3 +134,5 @@ $strings['Recordings'] = "Recordings";
 $strings['CreateGlobalVideoConference'] = "Create global video conference";
 $strings['ConferenceNotStarted'] = "Conference not started";
 $strings['MeetingNotFound'] = "Meeting not found";
+$strings['JoinURLNotAvailable'] = "URL not available";
+

plugin/zoom/lang/french.php

@@ -132,3 +132,4 @@ $strings['YouAreNotRegisteredToThisMeeting'] = "Vous n'êtes pas inscrit à cett
 $strings['ZoomVideoConferences'] = "Conférences vidéo Zoom";
 $strings['Recordings'] = "Enregistrements";
 $strings['CreateGlobalVideoConference'] = "Créer une conférence global";
+$strings['JoinURLNotAvailable'] = "URL pas disponible";

plugin/zoom/lang/spanish.php

@@ -132,3 +132,4 @@ $strings['YouAreNotRegisteredToThisMeeting'] = "No estás registrado en esta reu
 $strings['ZoomVideoConferences'] = "Videoconferencias Zoom";
 $strings['Recordings'] = "Grabaciones";
 $strings['CreateGlobalVideoConference'] = "Crear una videoconferencia global";
+$strings['JoinURLNotAvailable'] = "URL no disponible";

plugin/zoom/lib/zoom_plugin.class.php

@@ -855,7 +855,7 @@ class ZoomPlugin extends Plugin
                     // the participant must be registered
                     $participant = api_get_user_entity(api_get_user_id());
                     $registrant = $meeting->getRegistrant($participant);
-                    if (!is_null($registrant)) {
+                    if (null != $registrant) {
                         // the participant is registered
                         return $registrant->getCreatedRegistration()->join_url;
                     }

plugin/zoom/view/meeting.tpl

@@ -58,20 +58,29 @@
             }
         </script>
 
-            <table>
-            {% for registrant in registrants %}
-            <tr>
-                <td>
-                {{ registrant.fullName }}
-                </td>
-               <td>
-                <a class="btn btn-primary" onclick="copyJoinURL(event, '{{ registrant.join_url }}')">
-                    {{ 'CopyJoinAsURL'|get_plugin_lang('ZoomPlugin') }}
-                </a>
-               </td>
-            </tr>
-            {% endfor %}
+        {% if registrants.count > 0 %}
+            <h4>{{ 'Users' | get_lang }}</h4>
+            <table class="table">
+                {% for registrant in registrants %}
+                <tr>
+                    <td>
+                    {{ registrant.fullName }}
+                    </td>
+                   <td>
+                   {% if registrant.join_url %}
+                    <a class="btn btn-primary" onclick="copyJoinURL(event, '{{ registrant.join_url }}')">
+                        {{ 'CopyJoinAsURL'|get_plugin_lang('ZoomPlugin') }}
+                    </a>
+                   {% else %}
+                       <a class="btn btn-primary disabled" >
+                           {{ 'JoinURLNotAvailable'|get_plugin_lang('ZoomPlugin') }}
+                       </a>
+                   {% endif %}
+                   </td>
+                </tr>
+                {% endfor %}
             </table>
+        {% endif %}
     {% endif %}
 {% else %}