From 74568df4ff7b7788991636f6fb2ed62012f85c3b Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Tue, 22 Sep 2020 09:04:33 +0300
Subject: remove a lot of stuff from global context (functions.php), add a few
 helper classes instead

---
 classes/userhelper.php | 141 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 classes/userhelper.php

(limited to 'classes/userhelper.php')

diff --git a/classes/userhelper.php b/classes/userhelper.php
new file mode 100644
index 000000000..2ae1f7b83
--- /dev/null
+++ b/classes/userhelper.php
@@ -0,0 +1,141 @@
+<?php
+class UserHelper {
+
+	static function authenticate($login, $password, $check_only = false, $service = false) {
+
+		if (!SINGLE_USER_MODE) {
+			$user_id = false;
+			$auth_module = false;
+
+			foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_AUTH_USER) as $plugin) {
+
+				$user_id = (int) $plugin->authenticate($login, $password, $service);
+
+				if ($user_id) {
+					$auth_module = strtolower(get_class($plugin));
+					break;
+				}
+			}
+
+			if ($user_id && !$check_only) {
+
+				session_start();
+				session_regenerate_id(true);
+
+				$_SESSION["uid"] = $user_id;
+				$_SESSION["auth_module"] = $auth_module;
+
+				$pdo = Db::pdo();
+				$sth = $pdo->prepare("SELECT login,access_level,pwd_hash FROM ttrss_users
+					WHERE id = ?");
+				$sth->execute([$user_id]);
+				$row = $sth->fetch();
+
+				$_SESSION["name"] = $row["login"];
+				$_SESSION["access_level"] = $row["access_level"];
+				$_SESSION["csrf_token"] = bin2hex(get_random_bytes(16));
+
+				$usth = $pdo->prepare("UPDATE ttrss_users SET last_login = NOW() WHERE id = ?");
+				$usth->execute([$user_id]);
+
+				$_SESSION["ip_address"] = $_SERVER["REMOTE_ADDR"];
+				$_SESSION["user_agent"] = sha1($_SERVER['HTTP_USER_AGENT']);
+				$_SESSION["pwd_hash"] = $row["pwd_hash"];
+
+				Pref_Prefs::initialize_user_prefs($_SESSION["uid"]);
+
+				return true;
+			}
+
+			return false;
+
+		} else {
+
+			$_SESSION["uid"] = 1;
+			$_SESSION["name"] = "admin";
+			$_SESSION["access_level"] = 10;
+
+			$_SESSION["hide_hello"] = true;
+			$_SESSION["hide_logout"] = true;
+
+			$_SESSION["auth_module"] = false;
+
+			if (!$_SESSION["csrf_token"])
+				$_SESSION["csrf_token"] = bin2hex(get_random_bytes(16));
+
+			$_SESSION["ip_address"] = $_SERVER["REMOTE_ADDR"];
+
+			Pref_Prefs::initialize_user_prefs($_SESSION["uid"]);
+
+			return true;
+		}
+	}
+
+	static function load_user_plugins($owner_uid, $pluginhost = false) {
+
+		if (!$pluginhost) $pluginhost = PluginHost::getInstance();
+
+		if ($owner_uid && SCHEMA_VERSION >= 100 && !$_SESSION["safe_mode"]) {
+			$plugins = get_pref("_ENABLED_PLUGINS", $owner_uid);
+
+			$pluginhost->load($plugins, PluginHost::KIND_USER, $owner_uid);
+
+			if (get_schema_version() > 100) {
+				$pluginhost->load_data();
+			}
+		}
+	}
+
+	static function login_sequence() {
+		$pdo = Db::pdo();
+
+		if (SINGLE_USER_MODE) {
+			@session_start();
+			UserHelper::authenticate("admin", null);
+			startup_gettext();
+			UserHelper::load_user_plugins($_SESSION["uid"]);
+		} else {
+			if (!validate_session()) $_SESSION["uid"] = false;
+
+			if (!$_SESSION["uid"]) {
+
+				if (AUTH_AUTO_LOGIN && UserHelper::authenticate(null, null)) {
+					$_SESSION["ref_schema_version"] = get_schema_version(true);
+				} else {
+					 UserHelper::authenticate(null, null, true);
+				}
+
+				if (!$_SESSION["uid"]) {
+					Pref_Users::logout_user();
+
+					Handler_Public::render_login_form();
+					exit;
+				}
+
+			} else {
+				/* bump login timestamp */
+				$sth = $pdo->prepare("UPDATE ttrss_users SET last_login = NOW() WHERE id = ?");
+				$sth->execute([$_SESSION['uid']]);
+
+				$_SESSION["last_login_update"] = time();
+			}
+
+			if ($_SESSION["uid"]) {
+				startup_gettext();
+				UserHelper::load_user_plugins($_SESSION["uid"]);
+			}
+		}
+	}
+
+	static function print_user_stylesheet() {
+		$value = get_pref('USER_STYLESHEET');
+
+		if ($value) {
+			print "<style type='text/css' id='user_css_style'>";
+			print str_replace("<br/>", "\n", $value);
+			print "</style>";
+		}
+
+	}
+
+}
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