From 73a39f4f3f463ba7542b47847622917738e25c39 Mon Sep 17 00:00:00 2001
From: DAProgs <info@daprogs.com>
Date: Wed, 11 Mar 2026 11:08:24 -0400
Subject: [PATCH] Adding version checking

---
 includes/functions.php | 58 ++++++++++++++++++++++++++++++++++++++++++
 includes/style.php     |  6 +++--
 index.php              | 11 ++++++++
 version.php            |  2 +-
 4 files changed, 74 insertions(+), 3 deletions(-)

diff --git a/includes/functions.php b/includes/functions.php
index 586a785..2df04d5 100644
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -180,6 +180,64 @@ function run_fetch(): array {
     return $results;
 }
 
+// ── Upstream version check ────────────────────────────────────────────────────
+
+define('UPSTREAM_VERSION_URL', 'https://git.ny.daprogs.com/api/v1/repos/DAProgs/portspoof_concentrator/raw/version.php?ref=main');
+define('UPSTREAM_VERSION_CACHE', __DIR__ . '/../upstream_version.cache');
+define('UPSTREAM_VERSION_TTL', 3600); // seconds
+
+/**
+ * Fetch the upstream version string from the git repo, with a 1-hour file cache.
+ * Returns null silently on any failure so the page always loads.
+ */
+function fetch_upstream_version(): ?string {
+    // Return cached value if still fresh
+    if (file_exists(UPSTREAM_VERSION_CACHE)) {
+        $cached = json_decode(file_get_contents(UPSTREAM_VERSION_CACHE), true);
+        if (isset($cached['version'], $cached['checked_at'])
+            && (time() - $cached['checked_at']) < UPSTREAM_VERSION_TTL) {
+            return $cached['version'];
+        }
+    }
+
+    $ch = curl_init(UPSTREAM_VERSION_URL);
+    curl_setopt_array($ch, [
+        CURLOPT_RETURNTRANSFER => true,
+        CURLOPT_TIMEOUT        => 5,
+        CURLOPT_FOLLOWLOCATION => true,
+    ]);
+    $body = curl_exec($ch);
+    $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+    curl_close($ch);
+
+    if ($body === false || $code !== 200) {
+        return null;
+    }
+
+    if (!preg_match("/define\s*\(\s*'APP_VERSION'\s*,\s*'([^']+)'\s*\)/", $body, $m)) {
+        return null;
+    }
+
+    $version = $m[1];
+    file_put_contents(
+        UPSTREAM_VERSION_CACHE,
+        json_encode(['version' => $version, 'checked_at' => time()]),
+        LOCK_EX
+    );
+    return $version;
+}
+
+/**
+ * Returns true if $upstream is a newer version than $local.
+ * Format: YYMM.N  e.g. 2603.4
+ */
+function is_newer_version(string $upstream, string $local): bool {
+    $parse = fn($v) => array_map('intval', explode('.', $v, 2));
+    [$um, $un] = $parse($upstream);
+    [$lm, $ln] = $parse($local);
+    return $um > $lm || ($um === $lm && $un > $ln);
+}
+
 // ── API queries ───────────────────────────────────────────────────────────────
 
 /**
diff --git a/includes/style.php b/includes/style.php
index 9a866d9..d6a33db 100644
--- a/includes/style.php
+++ b/includes/style.php
@@ -72,8 +72,10 @@ button[type=submit]:hover { opacity: .85; }
 .link-btn.danger { color: var(--red); }
 
 .alert { padding: .65rem 1rem; border-radius: 6px; font-size: .875rem; }
-.alert.ok  { background: rgba(63,185,80,.15);  color: var(--green); border: 1px solid rgba(63,185,80,.4); }
-.alert.err { background: rgba(248,81,73,.15);  color: var(--red);   border: 1px solid rgba(248,81,73,.4); }
+.alert.ok   { background: rgba(63,185,80,.15);  color: var(--green);  border: 1px solid rgba(63,185,80,.4); }
+.alert.err  { background: rgba(248,81,73,.15);  color: var(--red);    border: 1px solid rgba(248,81,73,.4); }
+.alert.warn { background: rgba(210,153,34,.15); color: var(--yellow); border: 1px solid rgba(210,153,34,.4); }
+.alert.warn a { color: var(--yellow); }
 
 .badge { display: inline-block; font-size: .7rem; padding: .1rem .45rem; border-radius: 3px; background: var(--border); color: var(--muted); }
 .badge.ok { background: rgba(63,185,80,.2); color: var(--green); }
diff --git a/index.php b/index.php
index 85b1b79..2e4ab28 100644
--- a/index.php
+++ b/index.php
@@ -20,6 +20,9 @@ if ($filter_node) {
 
 $max_ip_cnt   = $t_ips   ? max(array_column($t_ips,   'cnt')) : 1;
 $max_port_cnt = $t_ports ? max(array_column($t_ports, 'cnt')) : 1;
+
+$upstream_version = fetch_upstream_version();
+$update_available = $upstream_version && is_newer_version($upstream_version, APP_VERSION);
 ?>
 <!DOCTYPE html>
 <html lang="en">
@@ -46,6 +49,14 @@ $max_port_cnt = $t_ports ? max(array_column($t_ports, 'cnt')) : 1;
 </header>
 <main>
 
+<?php if ($update_available): ?>
+<div class="alert warn">
+  Update available: <strong>v<?= h($upstream_version) ?></strong> —
+  you are running <strong>v<?= h(APP_VERSION) ?></strong>.
+  <a href="https://git.ny.daprogs.com/DAProgs/portspoof_concentrator" target="_blank">View release ↗</a>
+</div>
+<?php endif; ?>
+
 <!-- Stat cards -->
 <div class="stats-row">
   <div class="stat-card">
diff --git a/version.php b/version.php
index dd12e06..265a469 100644
--- a/version.php
+++ b/version.php
@@ -1,2 +1,2 @@
 <?php
-define('APP_VERSION', '2603.3');
+define('APP_VERSION', '2603.4');