Transition templating to Twig

1 files changed, 76 insertions, 28 deletions

diff --git a/src/index.php b/src/index.php
index 0c5cc3b..2403a9b 100644
--- a/src/index.php
+++ b/src/index.php
@@ -8,8 +8,13 @@ use mystic\forum\orm\Post;
 use mystic\forum\orm\Topic;
 use mystic\forum\orm\TopicLogMessage;
 use mystic\forum\orm\User;
+use mystic\forum\orm\UserPermissions;
 use mystic\forum\utils\RequestUtils;
 use mystic\forum\utils\StringUtils;
+use Twig\Environment;
+use Twig\Loader\FilesystemLoader;
+use Twig\TwigFilter;
+use Twig\TwigFunction;
 
 header_remove("X-Powered-By");
 
@@ -39,23 +44,17 @@ $_action = $_GET["_action"] ?? null;
 $GLOBALS["action"] = $_action;
 
 function msg_error(string $err, bool $skipLoginCheck = false): void {
-    _view("template_start", ["_title" => __("Error")]);
-    _view("template_navigation_start");
-    if (!$skipLoginCheck)
-        _view("template_navigation", ["user" => RequestUtils::getAuthorizedUser($GLOBALS["db"])]);
-    _view("template_navigation_end");
-    _view("alert_error", ["message" => $err]);
-    _view("template_end", [...getThemeAndLangInfo()]);
+    render("error_page.twig", [
+        "message" => $err,
+        "skipLoginCheck" => $skipLoginCheck,
+    ]);
 }
 
 function msg_info(string $msg, bool $skipLoginCheck = false): void {
-    _view("template_start", ["_title" => __("Information")]);
-    _view("template_navigation_start");
-    if (!$skipLoginCheck)
-        _view("template_navigation", ["user" => RequestUtils::getAuthorizedUser($GLOBALS["db"])]);
-    _view("template_navigation_end");
-    _view("alert_info", ["message" => $msg]);
-    _view("template_end", [...getThemeAndLangInfo()]);
+    render("info_page.twig", [
+        "message" => $msg,
+        "skipLoginCheck" => $skipLoginCheck,
+    ]);
 }
 
 function generateCaptchaText(): string {
@@ -129,20 +128,6 @@ function getThemeAndLangInfo(): array {
     ];
 }
 
-function _view(string $___NAME, array $___PARAMS = []): void {
-    $___PATH = __DIR__ . "/application/views/" . $___NAME . ".php";
-    if (!is_file($___PATH)) {
-        echo "<!--!ERROR Failed to include {" . htmlentities($___NAME) . "}-->\n";
-        echo "<br><p><strong style=\"color:red !important\">Failed to include <em>" . htmlentities($___NAME) . "</em></strong></p><br>\n";
-        echo "<!--/ERROR-->\n";
-    } else {
-        extract($___PARAMS);
-        echo "<!--{" . htmlentities($___NAME) . "}-->\n";
-        include $___PATH;
-        echo "<!--{/" . htmlentities($___NAME) . "}-->\n";
-    }
-}
-
 function isTrue(string $str): bool {
     $str = strtolower($str);
     return in_array($str, ["yes","true","y","t","on","enabled","1","?1"]);
@@ -164,6 +149,69 @@ function reArrayFiles(&$file_post) {
     return $file_ary;
 }
 
+function render(string $page, array $context = []): void {
+    $defaultTemplate = "bootstrap-3"; // bootstrap-3 is the default for backwards compatibility
+    $templateDir = __ROOT__ . "/application/templates";
+
+    [
+        "availableThemes" => $availableThemes,
+        "currentTheme" => $currentTheme,
+    ] = getThemeAndLangInfo();
+
+    $currentThemeInfo = $availableThemes[$currentTheme] ?? (object)[];
+    $currentTemplate = $currentThemeInfo->template ?? $defaultTemplate;
+
+    $availableTemplates = array_values(array_filter(scandir($templateDir), function($theme) use ($templateDir) {
+        return $theme[0] !== "." && is_dir($templateDir . "/" . $theme);
+    }));
+
+    if (!in_array($currentTemplate, $availableTemplates))
+        $currentTemplate = $defaultTemplate;
+
+    $loader = new FilesystemLoader([
+        $templateDir . "/" . $currentTemplate,
+    ]);
+    $twig = new Environment($loader, [
+        // TODO Enable caching
+    ]);
+
+    $twig->addFunction(new TwigFunction("__", __(...), [ "is_safe" => ["html"] ]));
+    $twig->addFunction(new TwigFunction("___", ___(...), [ "is_safe" => ["html"] ]));
+    $twig->addFunction(new TwigFunction("renderPost", renderPost(...), [ "is_safe" => ["html"] ]));
+    $twig->addFunction(new TwigFunction("renderPostSummary", renderPostSummary(...), [ "is_safe" => ["html"] ]));
+    $twig->addFunction(new TwigFunction("permission", fn(string $name): int => constant(UserPermissions::class . "::" . $name)));
+    $twig->addFunction(new TwigFunction("getAndClearFormError", RequestUtils::getAndClearFormError(...)));
+    $twig->addFunction(new TwigFunction("lastFormField", function(string $formId, string $field): ?string {
+        $lastFormId = "";
+        $lastForm = RequestUtils::getLastForm($lastFormId) ?? null;
+        if ($lastForm === null || $lastFormId !== $formId)
+            return null;
+        return $lastForm[$field] ?? null;
+    }));
+
+    $twig->addFilter(new TwigFilter("hash", fn(string $data, string $algo, bool $binary = false, array $options = []) => hash($algo, $data, $binary, $options)));
+    $twig->addFilter(new TwigFilter("base64_encode", base64_encode(...)));
+    $twig->addFilter(new TwigFilter("base64_decode", base64_decode(...)));
+
+    echo $twig->render($page, [
+        "g" => [
+            "get" => &$_GET,
+            "post" => &$_POST,
+            "request" => &$_REQUEST,
+            "session" => &$_SESSION,
+            "cookie" => &$_COOKIE,
+            "env" => &$_ENV,
+            "server" => &$_SERVER,
+            "globals" => $GLOBALS,
+        ],
+        "ctx" => &$context,
+
+        "currentUser" => &$GLOBALS["currentUser"],
+        ...getThemeAndLangInfo(),
+    ]);
+    RequestUtils::clearLastForm();
+}
+
 const TAGS_REGEX = '/\[(b|i|u|s|\\^|_|spoiler)\](.+?)\[\/\1\]/s';
 
 function expandTags(string $contents): string {