Ignore IPs and add configs for GoatCounter

Fixes #11.

.gitignore

@@ -1,4 +1,6 @@
 ## Custom
+dist/.goat.ignore
 dist/.goat.token
+dist/.goat.url
 dist/.links.db
-phpliteadmin.config.php
+dist/phpliteadmin.config.php

README.md

@@ -18,8 +18,16 @@ $> php -S localhost:8080 ./index.php
 Copy these files into the desired directory.
 There's a few hardcoded URLs in there that you'll have to fix yourself.
 One day I'll create a config file for that.
-
-You may override settings from `phpliteadmin.php` in the file `phpliteadmin.config.php`.
-Add your [GoatCounter](https://github.com/zgoat/goatcounter) API token with "Record pageviews" permission in the
-`.goat.token` file.
 The database at `.links.db` is automatically created when you visit the main page.
+
+## Configuration
+### phpLiteAdmin
+You may override settings from `phpliteadmin.php` in the file `phpliteadmin.config.php`.
+
+### GoatCounter
+GoatCounter is disabled unless the `.goat.token` and `.goat.url` files exist.
+
+* Add your [GoatCounter](https://github.com/zgoat/goatcounter) API token with "Record pageviews" permission in the
+  `.goat.token` file.
+* Add the URL of the `/count` API endpoint in `.goat.url`, e.g. `https://example.com/api/v0/count`.
+* Add IP addresses that should not be counted to `.goat.ignore`, separated by newlines.

dist/goatcounter.php

@@ -1,4 +1,25 @@
 <?php
+/**
+ * Returns true if GoatCounter should process the current request.
+ *
+ * @return bool true if GoatCounter should process the current request
+ */
+function goatcounter_should_process(): bool
+{
+    if (!is_readable(".goat.token") || !is_readable(".goat.url")) return false;
+
+    if (is_readable(".goat.ignore")) {
+        $ignored_ips = file(".goat.ignore", FILE_IGNORE_NEW_LINES);
+        if (in_array($_SERVER["REMOTE_ADDR"], $ignored_ips)) return false;
+    }
+
+    if (isset($_SERVER["HTTP_USER_AGENT"])
+        && preg_match("/bot|crawl|slurp|spider|mediapartners/i", $_SERVER["HTTP_USER_AGENT"])) return false;
+
+    return true;
+}
+
+
 /**
  * Sends a request to this website's GoatCounter server to record a hit.
  *
@@ -6,16 +27,14 @@
  */
 function goatcounter_record_hit(string $path)
 {
-    if (isset($_SERVER["HTTP_USER_AGENT"])
-        && preg_match("/bot|crawl|slurp|spider|mediapartners/i", $_SERVER["HTTP_USER_AGENT"])) {
-        return;
-    }
+    if (!goatcounter_should_process()) return;
 
 
     $token = file_get_contents(".goat.token");
+    $url = file_get_contents(".goat.url");
     $ch = curl_init();
 
-    curl_setopt($ch, CURLOPT_URL, "https://stats.fwdkr.co/api/v0/count");
+    curl_setopt($ch, CURLOPT_URL, $url);
     curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
     curl_setopt($ch, CURLOPT_POST, 1);
     curl_setopt($ch, CURLOPT_POSTFIELDS,

dist/index.php

@@ -107,7 +107,7 @@ if ($target != null && !$needs_confirmation) {
         $("#header").appendChild(header({title: "fwdkr.co"}));
         $("#footer").appendChild(footer({
             vcsURL: "https://git.fwdekker.com/FWDekker/fwdkr.co/",
-            version: "v1.3.2"
+            version: "v1.3.3"
         }));
     });
 </script>