From 1221acdf53470663589bfdd16725b9a6d546ec62 Mon Sep 17 00:00:00 2001
From: flashwave <me@flash.moe>
Date: Sun, 28 Jan 2024 03:50:24 +0000
Subject: [PATCH] Support including a short hash in json urls.

---
 public/index.php | 88 +++++++++++++++++++++++++++++++++++-------------
 1 file changed, 64 insertions(+), 24 deletions(-)

diff --git a/public/index.php b/public/index.php
index 6712b36..0bc3ebc 100644
--- a/public/index.php
+++ b/public/index.php
@@ -1,8 +1,14 @@
 <?php
 define('FTM_ROOT', __DIR__ . '/..');
+define('FTM_HASH', 'sha1');
 define('FTM_PATH_PUB', FTM_ROOT . '/public');
 define('FTM_PATH_PRV', FTM_ROOT . '/private');
 
+define('FTM_COMMON_CONFIG', FTM_PATH_PRV . '/common.ini');
+define('FTM_SOUND_LIBRARY', FTM_PATH_PRV . '/sound-library.ini');
+define('FTM_SOUND_PACKS', FTM_PATH_PRV . '/sound-packs.ini');
+define('FTM_TEXT_TRIGGERS', FTM_PATH_PRV . '/text-triggers.ini');
+
 define('FTM_LEGACY_SOUND_TYPE', [
     'opus' => 'audio/ogg',
     'ogg' => 'audio/ogg',
@@ -11,6 +17,14 @@ define('FTM_LEGACY_SOUND_TYPE', [
     'wav' => 'audio/wav',
 ]);
 
+define('FTM_FILE_HASH_MAP', [
+    'common' => [FTM_COMMON_CONFIG],
+    'sounds' => [FTM_SOUND_LIBRARY, FTM_SOUND_PACKS],
+    'sounds2' => [FTM_SOUND_LIBRARY, FTM_SOUND_PACKS],
+    'texttriggers' => [FTM_TEXT_TRIGGERS],
+    'soundtriggers' => [FTM_TEXT_TRIGGERS],
+]);
+
 header('X-Powered-By: Futami');
 header('Cache-Control: max-age=86400, must-revalidate');
 header('Access-Control-Allow-Origin: *');
@@ -34,6 +48,24 @@ function json_out($data): void {
     exit;
 }
 
+function ftm_hash_str(string $data): string {
+    return hash(FTM_HASH, $data);
+}
+function ftm_hash_file(string $path): string {
+    return hash_file(FTM_HASH, $path);
+}
+function hash_mapped_file(string $name): string {
+    $files = FTM_FILE_HASH_MAP[$name] ?? [];
+    if(count($files) === 1)
+        return ftm_hash_file($files[0]);
+
+    $data = '';
+    foreach($files as $file)
+        $data .= file_get_contents($file);
+
+    return ftm_hash_str($data);
+}
+
 function match_etag($eTag): void {
     if(filter_input(INPUT_SERVER, 'HTTP_IF_NONE_MATCH') === $eTag) {
         http_response_code(304);
@@ -41,10 +73,10 @@ function match_etag($eTag): void {
     }
 }
 function gen_etag(string $user, string $data): string {
-    return sprintf('W/"%s-%s"', hash('sha1', $data), $user);
+    return sprintf('W/"%s-%s"', ftm_hash_str($data), $user);
 }
 function gen_etag_file(string $user, string $path): string {
-    return gen_etag($user, hash_file('sha1', $path));
+    return gen_etag($user, ftm_hash_file($path));
 }
 function etag(string $etag): void {
     match_etag($etag);
@@ -60,22 +92,32 @@ function etag_file(string $user, string $path): void {
 $reqPath = '/' . trim(parse_url((string)filter_input(INPUT_SERVER, 'REQUEST_URI'), PHP_URL_PATH), '/');
 
 if($reqPath === '/common.json') {
-    $commonPath = FTM_PATH_PRV . '/common.ini';
-    etag_file('common', $commonPath);
+    etag_file('common', FTM_COMMON_CONFIG);
 
-    $common = parse_ini_file($commonPath, false, INI_SCANNER_TYPED);
+    $config = parse_ini_file(FTM_COMMON_CONFIG, false, INI_SCANNER_TYPED);
+    $common = new stdClass;
 
-    $colours = $common['colours'];
-    $common['colours'] = [];
-    foreach($colours as $n => $c)
-        $common['colours'][] = compact('n', 'c');
+    foreach($config as $key => $value) {
+        if($key === 'colours') {
+            $dict = $value;
+            $value = [];
+            foreach($dict as $name => $raw)
+                $value[] = ['n' => $name, 'c' => $raw];
+        } elseif(is_string($value) && str_starts_with($value, '::')) {
+            $parts = explode(':', substr($value, 2));
+            $hash = hash_mapped_file($parts[0]);
+            $value = sprintf($parts[1], $hash);
+        }
+
+        $common->{$key} = $value;
+    }
 
     json_out($common);
 }
 
-if($reqPath === '/sounds2.json') {
-    $sndLibData = file_get_contents(FTM_PATH_PRV . '/sound-library.ini');
-    $sndPackData = file_get_contents(FTM_PATH_PRV . '/sound-packs.ini');
+if(preg_match('#^/sounds2(\.[a-f0-9]{8})?.json$#', $reqPath)) {
+    $sndLibData = file_get_contents(FTM_SOUND_LIBRARY);
+    $sndPackData = file_get_contents(FTM_SOUND_PACKS);
 
     etag_data('sounds2', $sndLibData . $sndPackData);
 
@@ -101,9 +143,9 @@ if($reqPath === '/sounds2.json') {
     json_out(compact('library', 'packs'));
 }
 
-if($reqPath === '/sounds.json') {
-    $sndLibData = file_get_contents(FTM_PATH_PRV . '/sound-library.ini');
-    $sndPackData = file_get_contents(FTM_PATH_PRV . '/sound-packs.ini');
+if(preg_match('#^/sounds(\.[a-f0-9]{8})?.json$#', $reqPath)) {
+    $sndLibData = file_get_contents(FTM_SOUND_LIBRARY);
+    $sndPackData = file_get_contents(FTM_SOUND_PACKS);
 
     etag_data('sounds', $sndLibData . $sndPackData);
 
@@ -138,11 +180,10 @@ if($reqPath === '/sounds.json') {
     json_out(compact('library', 'packs'));
 }
 
-if($reqPath === '/texttriggers.json') {
-    $textTriggersPath = FTM_PATH_PRV . '/text-triggers.ini';
-    etag_file('texttriggers', $textTriggersPath);
+if(preg_match('#^/texttriggers(\.[a-f0-9]{8})?.json$#', $reqPath)) {
+    etag_file('texttriggers', FTM_TEXT_TRIGGERS);
 
-    $triggers = parse_ini_file($textTriggersPath, true, INI_SCANNER_TYPED);
+    $triggers = parse_ini_file(FTM_TEXT_TRIGGERS, true, INI_SCANNER_TYPED);
 
     if($triggers === false)
         $triggers = [];
@@ -152,12 +193,11 @@ if($reqPath === '/texttriggers.json') {
     json_out($triggers);
 }
 
-if($reqPath === '/soundtriggers.json') {
-    $textTriggersPath = FTM_PATH_PRV . '/text-triggers.ini';
-    etag_file('soundtriggers', $textTriggersPath);
+if(preg_match('#^/soundtriggers(\.[a-f0-9]{8})?.json$#', $reqPath)) {
+    etag_file('soundtriggers', FTM_TEXT_TRIGGERS);
 
-    $textTriggers = parse_ini_file($textTriggersPath, true, INI_SCANNER_TYPED);
-    $sndLib = parse_ini_file(FTM_PATH_PRV . '/sound-library.ini', true, INI_SCANNER_TYPED);
+    $textTriggers = parse_ini_file(FTM_TEXT_TRIGGERS, true, INI_SCANNER_TYPED);
+    $sndLib = parse_ini_file(FTM_SOUND_LIBRARY, true, INI_SCANNER_TYPED);
     $soundTrigs = [];
 
     foreach($textTriggers as $triggerInfo) {