256 lines
11 KiB
PHP
256 lines
11 KiB
PHP
<?php
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/**
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* Chat Plugin: backend.
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*
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* Local message cache + thin proxy over the relays /api/chat routes.
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* The plugin keeps a local SQLite table so the UI can render conversation
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* history without re-polling on every open. Reuses the existing relay_url /
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* relay_username / relay_key settings (no new credentials).
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*
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* Routes:
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* GET /api/chat/conversations → peer list with last msg + unread
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* GET /api/chat/messages?peer=X → all messages with one peer (asc)
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* POST /api/chat/send {peer,body} → encrypts + pushes via relay, stores local
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* POST /api/chat/poll → pulls new from relay, returns count
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* POST /api/chat/read {peer} → mark all incoming from peer as read
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* GET /api/chat/recipients → proxy of relays /api/tenants
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*/
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(function () {
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$db = Database::connect();
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$db->exec("
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CREATE TABLE IF NOT EXISTS chat_messages (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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peer TEXT NOT NULL,
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direction TEXT NOT NULL CHECK(direction IN ('in','out')),
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body TEXT NOT NULL,
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relay_id INTEGER,
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sent_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
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is_read INTEGER NOT NULL DEFAULT 0
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)
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");
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$db->exec("CREATE INDEX IF NOT EXISTS idx_chat_peer ON chat_messages(peer, sent_at)");
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$db->exec("CREATE UNIQUE INDEX IF NOT EXISTS idx_chat_relay_id ON chat_messages(relay_id) WHERE relay_id IS NOT NULL");
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// Track the largest relay msg id we've ever seen (so the next poll uses since=that)
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$db->exec("
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CREATE TABLE IF NOT EXISTS chat_state (
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key TEXT PRIMARY KEY,
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value TEXT
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)
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");
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})();
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function chatJson($data, int $code = 200): void {
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http_response_code($code);
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header('Content-Type: application/json');
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echo json_encode($data);
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exit;
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}
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function chatRelaySettings(): array {
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$db = Database::connect();
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return [
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'url' => $db->query("SELECT value FROM settings WHERE key = 'relay_url'")->fetchColumn() ?: '',
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'user' => $db->query("SELECT value FROM settings WHERE key = 'relay_username'")->fetchColumn() ?: '',
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'key' => $db->query("SELECT value FROM settings WHERE key = 'relay_key'")->fetchColumn() ?: '',
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];
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}
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/** Same envelope format as the existing relay sync (HYPRCRD-RELAY-V1). */
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function chatEncrypt(string $plain, string $relayKey): string {
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$encKey = substr(hash('sha256', $relayKey), 0, 32);
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$iv = random_bytes(16);
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$cipher = openssl_encrypt($plain, 'aes-256-cbc', $encKey, OPENSSL_RAW_DATA, $iv);
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return "HYPRCRD-RELAY-V1\n" . base64_encode($iv . $cipher);
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}
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function chatDecrypt(string $envelope, string $relayKey): string {
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if (!str_starts_with($envelope, 'HYPRCRD-RELAY-V1')) return '';
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$b64 = trim(substr($envelope, strlen('HYPRCRD-RELAY-V1') + 1));
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$raw = base64_decode($b64);
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if (!$raw || strlen($raw) < 17) return '';
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$encKey = substr(hash('sha256', $relayKey), 0, 32);
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$iv = substr($raw, 0, 16);
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$cipher = substr($raw, 16);
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$result = openssl_decrypt($cipher, 'aes-256-cbc', $encKey, OPENSSL_RAW_DATA, $iv);
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return $result !== false ? $result : '';
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}
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function chatGetState(string $key, $default = null) {
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$db = Database::connect();
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$stmt = $db->prepare('SELECT value FROM chat_state WHERE key = :k');
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$stmt->execute(['k' => $key]);
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$v = $stmt->fetchColumn();
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return $v === false ? $default : $v;
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}
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function chatSetState(string $key, $value): void {
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$db = Database::connect();
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$db->prepare('INSERT OR REPLACE INTO chat_state (key, value) VALUES (:k, :v)')
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->execute(['k' => $key, 'v' => (string)$value]);
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}
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PluginManager::instance()->onApiRoute(function (string $route, string $method) {
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if ($route === '/api/chat/conversations' && $method === 'GET') {
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$db = Database::connect();
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// Latest message per peer + unread count, single query
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$rows = $db->query("
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SELECT
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peer,
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MAX(sent_at) AS last_at,
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(SELECT body FROM chat_messages c2 WHERE c2.peer = c1.peer ORDER BY id DESC LIMIT 1) AS last_body,
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(SELECT direction FROM chat_messages c3 WHERE c3.peer = c1.peer ORDER BY id DESC LIMIT 1) AS last_direction,
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SUM(CASE WHEN direction = 'in' AND is_read = 0 THEN 1 ELSE 0 END) AS unread
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FROM chat_messages c1
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GROUP BY peer
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ORDER BY last_at DESC
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")->fetchAll();
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$totalUnread = array_sum(array_map(fn($r) => (int)$r['unread'], $rows));
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chatJson(['conversations' => $rows, 'total_unread' => $totalUnread]);
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}
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if ($route === '/api/chat/messages' && $method === 'GET') {
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$peer = trim((string)($_GET['peer'] ?? ''));
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if ($peer === '') chatJson(['error' => 'peer required'], 400);
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$db = Database::connect();
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$stmt = $db->prepare('SELECT id, direction, body, sent_at, is_read FROM chat_messages WHERE peer = :p ORDER BY id ASC LIMIT 500');
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$stmt->execute(['p' => $peer]);
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chatJson(['messages' => $stmt->fetchAll()]);
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}
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if ($route === '/api/chat/send' && $method === 'POST') {
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$input = json_decode(file_get_contents('php://input'), true) ?: [];
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$peer = trim((string)($input['peer'] ?? ''));
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$body = (string)($input['body'] ?? '');
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if ($peer === '' || $body === '') chatJson(['error' => 'peer and body required'], 400);
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$r = chatRelaySettings();
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if (!$r['url'] || !$r['user'] || !$r['key']) {
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chatJson(['error' => 'relay not configured (set URL, username, and secret in settings)'], 400);
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}
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$envelope = chatEncrypt($body, $r['key']);
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$relayChatUrl = rtrim($r['url'], '/') . '/api/chat';
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$ch = curl_init($relayChatUrl);
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curl_setopt_array($ch, [
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_POST => true,
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CURLOPT_POSTFIELDS => json_encode(['recipient' => $peer, 'body' => $envelope]),
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CURLOPT_HTTPHEADER => [
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'Content-Type: application/json',
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'X-Relay-User: ' . $r['user'],
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'X-Relay-Key: ' . $r['key'],
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],
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CURLOPT_TIMEOUT => 10,
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]);
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$response = curl_exec($ch);
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$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($status !== 200) {
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$relayErr = '';
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$decoded = json_decode($response, true);
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if (is_array($decoded) && !empty($decoded['error'])) $relayErr = ' — ' . $decoded['error'];
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chatJson([
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'ok' => false,
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'error' => "relay returned HTTP $status$relayErr",
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'url' => $relayChatUrl,
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'response_body' => is_string($response) ? substr($response, 0, 500) : null,
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]);
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}
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$resData = json_decode($response, true);
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$relayId = isset($resData['id']) ? (int)$resData['id'] : null;
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// Store the outgoing message locally so the UI can render it immediately
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$db = Database::connect();
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$db->prepare('INSERT INTO chat_messages (peer, direction, body, relay_id, sent_at, is_read) VALUES (:p, "out", :b, NULL, datetime("now"), 1)')
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->execute(['p' => $peer, 'b' => $body]);
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chatJson(['ok' => true, 'id' => (int)$db->lastInsertId()]);
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}
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if ($route === '/api/chat/poll' && $method === 'POST') {
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$r = chatRelaySettings();
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if (!$r['url'] || !$r['user'] || !$r['key']) {
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chatJson(['ok' => true, 'new' => 0, 'note' => 'relay not configured']);
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}
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$since = (int)chatGetState('last_relay_id', 0);
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$ch = curl_init(rtrim($r['url'], '/') . '/api/chat?since=' . $since);
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curl_setopt_array($ch, [
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_HTTPHEADER => [
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'X-Relay-User: ' . $r['user'],
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'X-Relay-Key: ' . $r['key'],
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],
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CURLOPT_TIMEOUT => 10,
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]);
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$response = curl_exec($ch);
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$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($status !== 200) {
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$relayErr = '';
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$decoded = json_decode($response, true);
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if (is_array($decoded) && !empty($decoded['error'])) $relayErr = ' — ' . $decoded['error'];
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chatJson(['ok' => false, 'error' => "relay returned HTTP $status$relayErr"]);
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}
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$data = json_decode($response, true) ?: [];
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$messages = $data['messages'] ?? [];
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$maxId = (int)($data['max_id'] ?? $since);
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$db = Database::connect();
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$newCount = 0;
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$insert = $db->prepare('INSERT OR IGNORE INTO chat_messages (peer, direction, body, relay_id, sent_at, is_read) VALUES (:p, "in", :b, :rid, :ts, 0)');
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foreach ($messages as $m) {
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$plain = chatDecrypt($m['body'] ?? '', $r['key']);
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if ($plain === '') continue;
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$insert->execute([
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'p' => $m['sender_username'] ?? '?',
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'b' => $plain,
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'rid' => (int)$m['id'],
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'ts' => $m['created_at'] ?? date('Y-m-d H:i:s'),
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]);
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if ($insert->rowCount() > 0) $newCount++;
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}
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if ($maxId > $since) chatSetState('last_relay_id', $maxId);
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chatJson(['ok' => true, 'new' => $newCount]);
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}
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if ($route === '/api/chat/read' && $method === 'POST') {
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$input = json_decode(file_get_contents('php://input'), true) ?: [];
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$peer = trim((string)($input['peer'] ?? ''));
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if ($peer === '') chatJson(['error' => 'peer required'], 400);
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$db = Database::connect();
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$db->prepare('UPDATE chat_messages SET is_read = 1 WHERE peer = :p AND direction = "in" AND is_read = 0')
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->execute(['p' => $peer]);
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chatJson(['ok' => true]);
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}
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if ($route === '/api/chat/recipients' && $method === 'GET') {
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$r = chatRelaySettings();
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if (!$r['url'] || !$r['user'] || !$r['key']) {
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chatJson(['ok' => false, 'error' => 'relay not configured']);
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}
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$ch = curl_init(rtrim($r['url'], '/') . '/api/tenants');
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curl_setopt_array($ch, [
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_HTTPHEADER => [
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'X-Relay-User: ' . $r['user'],
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'X-Relay-Key: ' . $r['key'],
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],
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CURLOPT_TIMEOUT => 10,
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]);
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$response = curl_exec($ch);
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$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($status !== 200) chatJson(['ok' => false, 'error' => "relay returned HTTP $status"]);
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$data = json_decode($response, true) ?: [];
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chatJson(['ok' => true, 'tenants' => $data['tenants'] ?? [], 'self' => $data['self'] ?? $r['user']]);
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}
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});
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