From 0a56fc4694af3af80d3b159623ccddc8ffed6b19 Mon Sep 17 00:00:00 2001
From: Tony Murray <murraytony@gmail.com>
Date: Tue, 19 Feb 2019 00:33:51 -0600
Subject: [PATCH] Restore alert template converter for a while longer (#9845)

---
 html/includes/forms/convert-template.inc.php | 113 +++++++++++++++++++
 html/includes/modal/alert_template.inc.php   |  35 ++++++
 2 files changed, 148 insertions(+)
 create mode 100644 html/includes/forms/convert-template.inc.php

diff --git a/html/includes/forms/convert-template.inc.php b/html/includes/forms/convert-template.inc.php
new file mode 100644
index 0000000000..c9674c3a18
--- /dev/null
+++ b/html/includes/forms/convert-template.inc.php
@@ -0,0 +1,113 @@
+<?php
+//FIXME remove Deprecated template
+
+/**
+ * convert-template.inc.php
+ *
+ * Ajax method to convert templates from the old syntax to the blade syntax
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package    LibreNMS
+ * @link       http://librenms.org
+ * @copyright  2018 Neil Lathwood
+ * @copyright  2018 Tony Murray
+ * @author     Tony Murray <murraytony@gmail.com>
+ */
+
+use LibreNMS\Authentication\LegacyAuth;
+
+header('Content-type: application/json');
+
+if (!LegacyAuth::user()->hasGlobalAdmin()) {
+    die(json_encode([
+        'status' => 'error',
+        'message' => 'You need to be admin',
+    ]));
+}
+
+if (empty($vars['template'])) {
+    die(json_encode([
+        'status' => 'error',
+        'message' => 'No template to convert',
+    ]));
+}
+
+$new_body = '';
+foreach (explode(PHP_EOL, $vars['template']) as $line) {
+    $new_body .= convert_template($line) . PHP_EOL;
+}
+$new_title = convert_template($vars['title']);
+
+function convert_template($line)
+{
+    if (str_contains($line, '{calc')) {
+        return preg_replace(
+            [
+                '/{calc[ ]*([\w\d\s\%\.\(\)\*\/\-\+\/]+)}/',// Replaces {calc (something*100)}
+                '/%([\w\d]+)\.([\w\d]+)/',// Replaces %something.anything
+            ],
+            [
+                "@php\necho \\1;\n@endphp ",
+                '$value[\'\2\']',
+            ],
+            $line
+        );
+    }
+
+    $old1 = $line;
+    $find = [
+        '/{if %([\w=\s]+)}/',// Replaces {if %something == else}
+        '/{else}/',// Replaces {else}
+        '/{\/if}/',// Replaces {/if}
+        '/{foreach %faults}/',// Replaces {foreach %faults}
+        '/{foreach %contacts}/',// Replaces {foreach %contacts}
+        '/{\/foreach}/',// Replaces {/foreach}
+        '/{calc[ ]*([\w\d\s\%\.\(\)\*\/\-\+\/]+)}/',// Replaces {calc (something*100)}
+        '/%value.string/',// Replaces %value.string
+        '/%([\w\d]+)\.([\w\d]+)/',// Replaces %something.anything
+        '/%([\w\d]+)/',// Replaces %anything
+    ];
+    $replace = [
+        ' @if ($alert->\1) ',
+        ' @else ',
+        ' @endif ',
+        ' @foreach ($alert->faults as $key => $value)',
+        ' @foreach ($alert->contacts as $key => $value)',
+        ' @endforeach ',
+        " @php\necho \\1;\n@endphp ",
+        '{{ $value[\'string\'] }}',
+        '{{ $\1[\'\2\'] }}',
+        '{{ $alert->\1 }}',
+    ];
+    $old1 = preg_replace($find, $replace, $old1);
+
+    // Revert some over-zealous changes:
+    $find = [
+        '/\$alert->key/',
+        '/\$alert->value/',
+    ];
+    $replace = [
+        '$key',
+        '$value',
+    ];
+    return preg_replace($find, $replace, $old1);
+}
+
+die(json_encode([
+    'status' => 'ok',
+    'message' => 'Template converted, review and save to update',
+    'template' => $new_body,
+    'title' => $new_title,
+]));
diff --git a/html/includes/modal/alert_template.inc.php b/html/includes/modal/alert_template.inc.php
index cb3e7958e3..b4dcbd2b36 100644
--- a/html/includes/modal/alert_template.inc.php
+++ b/html/includes/modal/alert_template.inc.php
@@ -50,6 +50,8 @@ if (!LegacyAuth::user()->hasGlobalAdmin()) {
                             <input type="text" class="form-control input-sm" id="title_rec" name="title_rec" placeholder="Recovery Title">
                         </div>
                         <button type="button" class="btn btn-primary btn-sm" name="create-template" id="create-template">Create template</button>
+                        <!--//FIXME remove Deprecated template-->
+                        <button type="button" class="btn btn-default btn-sm" name="convert-template" id="convert-template" title="Convert template to new syntax" style="display: none">Convert template</button>
                     </div>
                 </div>
             </div>
@@ -112,6 +114,11 @@ $('#alert-template').on('show.bs.modal', function (event) {
                     return data.text;
                 }
             }).val(selected_rules).trigger("change");
+            //FIXME remove Deprecated template
+            if(output['template'].indexOf("{/if}")>=0){
+                toastr.info('The old template syntax is no longer supported. Please see https://docs.librenms.org/Alerting/Old_Templates/');
+                $('#convert-template').show();
+            }
         }
     });
 });
@@ -128,6 +135,8 @@ $('#alert-template').on('hide.bs.modal', function(event) {
     $('#reset-default').remove();
     $('#name').prop("disabled",false);
     $('#error').val('');
+    //FIXME remove Deprecated template
+    $('#convert-template').hide();
 });
 
 $('#create-template').click('', function(e) {
@@ -147,6 +156,32 @@ $('#create-template').click('', function(e) {
     alertTemplateAjaxOps(template, name, template_id, title, title_rec, rules_items.join(','));
 });
 
+//FIXME remove Deprecated template
+$('#convert-template').click('', function(e) {
+    e.preventDefault();
+    var template = $("#template").val();
+    var title    = $("#title").val();
+    $.ajax({
+        type: "POST",
+        url: "ajax_form.php",
+        data: {type: "convert-template", template: template, title: title},
+        dataType: "json",
+        success: function(output) {
+            if(output.status === 'ok') {
+                toastr.success(output.message);
+                $("#convert-template").hide();
+                $("#template").val(output.template);
+                $("#title").val(output.title);
+            } else {
+                toastr.error(output.message);
+            }
+        },
+        error: function(){
+            toastr.error('An error occurred updating this alert template.');
+        }
+    });
+});
+
 function alertTemplateAjaxOps(template, name, template_id, title, title_rec, rules) {
     $.ajax({
         type: "POST",