Add database table and cron job to send reminders (isue #6)

cron.php

@@ -0,0 +1,65 @@
+<?php
+
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+// Run this script via cron every 15 minutes to send reminder notifications.
+require __DIR__ . '/settings.php';
+require __DIR__ . '/vendor/autoload.php';
+$libs = glob(__DIR__ . "/lib/*.lib.php");
+foreach ($libs as $lib) {
+    require_once $lib;
+}
+$Strings = new Strings(LANGUAGE);
+date_default_timezone_set(TIMEZONE);
+
+use Medoo\Medoo;
+
+$database;
+try {
+    $database = new Medoo([
+        'database_type' => DB_TYPE,
+        'database_name' => DB_NAME,
+        'server' => DB_SERVER,
+        'username' => DB_USER,
+        'password' => DB_PASS,
+        'charset' => DB_CHARSET
+    ]);
+} catch (Exception $ex) {
+    echo "Database error: $ex\n";
+    exit(1);
+}
+
+$reminders = $database->select('reminders', [
+    'reminderid (id)',
+    'noteid',
+    'when'
+        ], [
+    'when[<]' => date("Y-m-d H:i:s", strtotime("now + 15 minutes"))
+        ]);
+
+echo "Start sending " . count($reminders) . " reminder notifications...\n";
+
+$deleteids = [];
+$linelimit = 3;
+
+foreach ($reminders as $r) {
+    $note = Note::loadNote($r['noteid']);
+    $lines = explode("\n", $note->getText(), $linelimit);
+    if (count($lines) == $linelimit) {
+        array_pop($lines);
+        $lines[] = $Strings->build("Open {app} to read more", ["app" => SITE_TITLE], false);
+    }
+    $content = implode("\n", $lines);
+    Notifications::add($note->getOwner(), $Strings->get("Note Reminder", false), $content);
+    $deleteids[] = $r['id'];
+}
+
+echo "Sent " . count($reminders) . " notifications.\n";
+
+$deleted = $database->delete('reminders', ['reminderid' => $deleteids]);
+
+echo "Outdated reminder cleanup complete: " . $deleted->rowCount() . " records removed.\n";

langs/en/notes.json

@@ -21,5 +21,7 @@
     "Office": "Office",
     "Download (Text)": "Download (Text)",
     "Download (HTML)": "Download (HTML)",
-    "Download (Office)": "Download (Office)"
+    "Download (Office)": "Download (Office)",
+    "Note Reminder": "Note Reminder",
+    "Open {app} to read more": "Open {app} to read more"
 }

settings.template.php

@@ -43,7 +43,7 @@ define("CAPTCHA_ENABLED", FALSE);
 define('CAPTCHA_SERVER', 'https://captcheck.netsyms.com');
 
 // See lang folder for language options
-define('LANGUAGE', "en_us");
+define('LANGUAGE', "en");
 
 
 define("FOOTER_TEXT", "");