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plugin/add_cas_logout_button/README.md

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+Add CAS logout button plugin
+===
+
+This plugin adds a button to allow users to logout from their CAS session.
+
+In order for the plugin to work, you'll have to:
+
+* enable your CAS connection to display this button.
+* configure your CAS connection to have the button works.
+* go to Administration > Configuration settings > CAS and follow the instructions.
+
+This plugin has been made to be added in the login_top region, but you can put it wherever you want.

plugin/add_cas_logout_button/css.css

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+.cas_plugin_image {
+    float:left; 
+    height:50px;
+    margin: 0px 5px 5px 0px;        
+}
+.cas_plugin_comm {
+    font-style:italic;
+}
+.cas_plugin_clear {
+    clear:both;
+    height:1px;
+}

plugin/add_cas_logout_button/index.php

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+<?php
+// Show the CAS button to logout to your CAS session
+global $_user;
+$_template['show_message'] = false;
+
+if (!api_is_anonymous() &&
+    api_get_setting('cas_activate') == 'true' &&
+    $_user['auth_source'] == CAS_AUTH_SOURCE
+) {
+    $_template['show_message'] = true;
+    // the default title
+    $logout_label = "Deconnexion de CAS";
+    if (!empty($plugin_info['settings']['add_cas_logout_button_cas_logout_label'])) {
+        $logout_label = api_htmlentities($plugin_info['settings']['add_cas_logout_button_cas_logout_label']);
+    }
+    // the comm
+    $logout_comment = api_htmlentities($plugin_info['settings']['add_cas_logout_button_cas_logout_comment']);
+
+    // URL of the image
+    $logout_image_url = $plugin_info['settings']['add_cas_logout_button_cas_logout_image_url'];
+
+    $_template['logout_label'] = $logout_label;
+    $_template['form'] = Template::displayCASLogoutButton(get_lang('Logout'));
+    $_template['logout_comment'] = $logout_comment;
+    $_template['logout_image_url'] = $logout_image_url;
+}

plugin/add_cas_logout_button/plugin.php

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+<?php
+/**
+ * This script is a configuration file for the date plugin. You can use it as a master for other platform plugins (course plugins are slightly different).
+ * These settings will be used in the administration interface for plugins (Chamilo configuration settings->Plugins).
+ *
+ * @package chamilo.plugin
+ *
+ * @author Julio Montoya <gugli100@gmail.com>
+ */
+/**
+ * Plugin details (must be present).
+ */
+
+//the plugin title
+$plugin_info['title'] = 'Add a button to logout from CAS';
+
+//the comments that go with the plugin
+$plugin_info['comment'] = "If CAS is activated, this plugin add a text and a button on the user page to logout from a CAS session. Configure plugin to add title, comment and logo.";
+//the plugin version
+$plugin_info['version'] = '1.0';
+//the plugin author
+$plugin_info['author'] = 'Hubert Borderiou';
+//the plugin configuration
+$form = new FormValidator('add_cas_button_form');
+$form->addElement('text', 'cas_logout_label', 'CAS logout title', '');
+$form->addElement('text', 'cas_logout_comment', 'CAS logout description', '');
+$form->addElement('text', 'cas_logout_image_url', 'Logo URL if any (image, 50px height)');
+$form->addButtonSave(get_lang('Save'), 'submit_button');
+//get default value for form
+$defaults = [];
+$tab_default_add_cas_logout_button_cas_logout_label = api_get_setting('add_cas_logout_button_cas_logout_label');
+$tab_default_add_cas_logout_button_cas_logout_comment = api_get_setting('add_cas_logout_button_cas_logout_comment');
+$tab_default_add_cas_logout_button_cas_logout_image_url = api_get_setting('add_cas_logout_button_cas_logout_image_url');
+if ($tab_default_add_cas_logout_button_cas_logout_label) {
+    $defaults['cas_logout_label'] = $tab_default_add_cas_logout_button_cas_logout_label['add_cas_logout_button'];
+}
+if ($tab_default_add_cas_logout_button_cas_logout_comment) {
+    $defaults['cas_logout_comment'] = $tab_default_add_cas_logout_button_cas_logout_comment['add_cas_logout_button'];
+}
+
+if ($tab_default_add_cas_logout_button_cas_logout_image_url) {
+    $defaults['cas_logout_image_url'] = $tab_default_add_cas_logout_button_cas_logout_image_url['add_cas_logout_button'];
+}
+
+$form->setDefaults($defaults);
+//display form
+$plugin_info['settings_form'] = $form;
+
+// Set the templates that are going to be used
+$plugin_info['templates'] = ['template.tpl'];

plugin/add_cas_logout_button/template.tpl

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+{% if add_cas_logout_button.show_message %}
+    <link href="{{ _p.web_plugin }}add_cas_logout_button/css.css" rel="stylesheet" type="text/css"> 
+    <div class="well">
+        {% if add_cas_logout_button.logout_image_url %}
+            <img src="{{add_cas_logout_button.logout_image_url}}" class='cas_plugin_image'/>
+        {% endif %}
+        <h4>{{add_cas_logout_button.logout_label}}</h4>
+        {% if add_cas_logout_button.logout_image_url %}
+            <div class='cas_plugin_clear'>&nbsp;</div>
+        {% endif %}
+        <div class='cas_plugin_comm'>{{add_cas_logout_button.logout_comment}}</div>
+        {{ add_cas_logout_button.form }}
+        
+    </div>
+{% endif %}