From f2c9561d9b5c5a016f206055286be42e417b7a52 Mon Sep 17 00:00:00 2001
From: Sebastien Clement <seb6596@gmail.com>
Date: Tue, 7 Sep 2021 12:39:31 +0200
Subject: [PATCH] :hammer: Add custom cron setting #78

---
 .../opt/nextcloud_backup/tools/cronTools.js      |  4 ++++
 .../opt/nextcloud_backup/tools/settingsTools.js  | 13 +++++++++++++
 .../views/modals/backup-settings-modal.ejs       | 16 ++++++++++++++++
 3 files changed, 33 insertions(+)

diff --git a/nextcloud_backup/rootfs/opt/nextcloud_backup/tools/cronTools.js b/nextcloud_backup/rootfs/opt/nextcloud_backup/tools/cronTools.js
index 62e8fb7..335ecb3 100644
--- a/nextcloud_backup/rootfs/opt/nextcloud_backup/tools/cronTools.js
+++ b/nextcloud_backup/rootfs/opt/nextcloud_backup/tools/cronTools.js
@@ -64,6 +64,10 @@ class CronContainer {
                 cronStr = "" + splited[1] + " " + splited[0] + " " + settings.cron_month_day + " * *";
                 break;
             }
+            case "4": {
+                cronStr = settings.cron_custom;
+                break;
+            }
         }
         logger.info("Starting Cron...");
         this.cronJob = new CronJob(cronStr, this._createBackup, null, false, Intl.DateTimeFormat().resolvedOptions().timeZone);
diff --git a/nextcloud_backup/rootfs/opt/nextcloud_backup/tools/settingsTools.js b/nextcloud_backup/rootfs/opt/nextcloud_backup/tools/settingsTools.js
index b6602e0..03a6d96 100644
--- a/nextcloud_backup/rootfs/opt/nextcloud_backup/tools/settingsTools.js
+++ b/nextcloud_backup/rootfs/opt/nextcloud_backup/tools/settingsTools.js
@@ -1,6 +1,7 @@
 const fs = require("fs");
 const logger = require("../config/winston");
 const moment = require("moment");
+const CronJob = require("cron").CronJob;
 
 const settingsPath = "/data/backup_conf.json";
 
@@ -20,6 +21,17 @@ function check_cron(conf) {
             return conf.cron_month_day != null && conf.cron_month_day >= 1 && conf.cron_month_day <= 28;
         }
 
+        if (conf.cron_base === "4") {
+            if (conf.cron_custom != null) {
+                try {
+                    new CronJob(conf.cron_custom, () => {});
+                    return true;
+                } catch(e) {
+                    return false;
+                }
+            }else return false;
+        }
+
         if (conf.cron_base === "0") return true;
     } else return false;
 
@@ -35,6 +47,7 @@ function check(conf, fallback = false) {
             conf.cron_hour = "00:00";
             conf.cron_weekday = "0";
             conf.cron_month_day = "1";
+            conf.cron_custom = "5 4 * * *";
         } else {
             logger.error("Bad value for cron settings");
             return [false, "Bad cron settings"];
diff --git a/nextcloud_backup/rootfs/opt/nextcloud_backup/views/modals/backup-settings-modal.ejs b/nextcloud_backup/rootfs/opt/nextcloud_backup/views/modals/backup-settings-modal.ejs
index 22f7694..2e756d8 100644
--- a/nextcloud_backup/rootfs/opt/nextcloud_backup/views/modals/backup-settings-modal.ejs
+++ b/nextcloud_backup/rootfs/opt/nextcloud_backup/views/modals/backup-settings-modal.ejs
@@ -88,6 +88,7 @@
                             <option value="1">Daily</option>
                             <option value="2">Weekly</option>
                             <option value="3">Monthly</option>
+                            <option value="4">Custom</option>
                         </select>
                     </div>
                 </div>
@@ -120,6 +121,21 @@
                         <input type="number" class="form-control" id="cron-drop-day-month" min="1" max="28">
                     </div>
                 </div>
+
+                <div class="row d-none mt-2">
+                    <div class="col-12 col-lg-10 offset-lg-1">
+                        <label for="cron-drop-custom" class="form-label">Custom Cron Pattern</label>
+                        <input type="text" class="form-control" id="cron-drop-custom"> 
+                        <span id="help-cron-custom"" class="form-text">
+                           Only '*', ranges (1-3,5), steps (*/2) are allowed. 
+                            <a target="_blank"
+                               href="https://crontab.guru/">
+                                Generator
+                            </a>
+                        </span>
+                    </div>
+                </div>
+
                 <div class="row my-3">
                     <div class="col-12 text-center border-secondary border"></div>
                 </div>