Don't show link to start chat with non-friend users

main/inc/lib/social.lib.php

@@ -1649,6 +1649,10 @@ class SocialManager extends UserManager
             return '';
         }
 
+        $currentUserId = api_get_user_id();
+        $userId = intval($userId);
+        $userRelationType = 0;
+
         $socialAvatarBlock = SocialManager::show_social_avatar_block(
             $groupBlock,
             $groupId,
@@ -1656,8 +1660,14 @@ class SocialManager extends UserManager
         );
 
         $profileEditionLink = null;
-        if (api_get_user_id() == $userId) {
+
+        if ($currentUserId === $userId) {
             $profileEditionLink = Display::getProfileEditionLink($userId);
+        } else {
+            $userRelationType = SocialManager::get_relation_between_contacts(
+                $currentUserId,
+                $userId
+            );
         }
 
         $vCardUserLink = Display::getVCardUserLink($userId);
@@ -1684,6 +1694,8 @@ class SocialManager extends UserManager
         }
         $chatEnabled = api_is_global_chat_enabled();
         $template->assign('chat_enabled', $chatEnabled);
+        $template->assign('user_relation', $userRelationType);
+        $template->assign('user_relation_type_friend', USER_RELATION_TYPE_FRIEND);
         $templateName = $template->get_template('social/user_block.tpl');
 
         if (in_array($groupBlock, ['groups', 'group_edit', 'member_list'])) {

main/template/default/social/user_block.tpl

@@ -32,20 +32,19 @@
                                 </li>
                             {% endif %}
                         {% if chat_enabled == 1 %}
+                            {% if user.user_is_online_in_chat != 0 %}
+                                {% if user_relation == user_relation_type_friend %}
                                     <li class="item">
-                                {% if user.id == _u.id %}
-                                    <img src="{{ "online.png" | icon }}" alt="{{ "Online" | get_lang }}">
-                                    {{ "Chat" | get_lang }} ({{ "Online" | get_lang }})
-                                {% elseif user.user_is_online_in_chat != 0 %}
                                         <a onclick="javascript:chatWith('{{ user.id }}', '{{ user.complete_name }}', '{{ user.user_is_online }}','{{ user.avatar_small }}')" href="javascript:void(0);">
                                             <img src="{{ "online.png" | icon }}" alt="{{ "Online" | get_lang }}">
                                             {{ "Chat" | get_lang }} ({{ "Online" | get_lang }})
                                         </a>
-                                {% else %}
-                                    <img src="{{ "offline.png" | icon }}" alt="{{ "Online" | get_lang }}">
-                                    {{ "Chat" | get_lang }} ({{ "Offline" | get_lang }})
-                                {% endif %}
                                     </li>
+                                {# else #}
+                                    {# <img src="{{ "offline.png" | icon }}" alt="{{ "Online" | get_lang }}"> #}
+                                    {# {{ "Chat" | get_lang }} ({{ "Offline" | get_lang }}) #}
+                                {% endif %}
+                            {% endif %}
                         {% endif %}
                         
                         {% if not profile_edition_link is empty %}