Plugins: add inbound claim and Telegram interaction seams

src/plugins/interactive.ts

@@ -0,0 +1,156 @@
+import { createDedupeCache } from "../infra/dedupe.js";
+import type {
+  PluginInteractiveButtons,
+  PluginInteractiveHandlerRegistration,
+  PluginInteractiveTelegramHandlerContext,
+} from "./types.js";
+
+type RegisteredInteractiveHandler = PluginInteractiveHandlerRegistration & {
+  pluginId: string;
+};
+
+type InteractiveRegistrationResult = {
+  ok: boolean;
+  error?: string;
+};
+
+type InteractiveDispatchResult =
+  | { matched: false; handled: false; duplicate: false }
+  | { matched: true; handled: boolean; duplicate: boolean };
+
+const interactiveHandlers = new Map<string, RegisteredInteractiveHandler>();
+const callbackDedupe = createDedupeCache({
+  ttlMs: 5 * 60_000,
+  maxSize: 4096,
+});
+
+function toRegistryKey(channel: string, namespace: string): string {
+  return `${channel.trim().toLowerCase()}:${namespace.trim()}`;
+}
+
+function normalizeNamespace(namespace: string): string {
+  return namespace.trim();
+}
+
+function validateNamespace(namespace: string): string | null {
+  if (!namespace.trim()) {
+    return "Interactive handler namespace cannot be empty";
+  }
+  if (!/^[A-Za-z0-9._-]+$/.test(namespace.trim())) {
+    return "Interactive handler namespace must contain only letters, numbers, dots, underscores, and hyphens";
+  }
+  return null;
+}
+
+function resolveNamespaceMatch(
+  channel: string,
+  data: string,
+): { registration: RegisteredInteractiveHandler; namespace: string; payload: string } | null {
+  const trimmedData = data.trim();
+  if (!trimmedData) {
+    return null;
+  }
+
+  const separatorIndex = trimmedData.indexOf(":");
+  const namespace =
+    separatorIndex >= 0 ? trimmedData.slice(0, separatorIndex) : normalizeNamespace(trimmedData);
+  const registration = interactiveHandlers.get(toRegistryKey(channel, namespace));
+  if (!registration) {
+    return null;
+  }
+
+  return {
+    registration,
+    namespace,
+    payload: separatorIndex >= 0 ? trimmedData.slice(separatorIndex + 1) : "",
+  };
+}
+
+export function registerPluginInteractiveHandler(
+  pluginId: string,
+  registration: PluginInteractiveHandlerRegistration,
+): InteractiveRegistrationResult {
+  const namespace = normalizeNamespace(registration.namespace);
+  const validationError = validateNamespace(namespace);
+  if (validationError) {
+    return { ok: false, error: validationError };
+  }
+  const key = toRegistryKey(registration.channel, namespace);
+  const existing = interactiveHandlers.get(key);
+  if (existing) {
+    return {
+      ok: false,
+      error: `Interactive handler namespace "${namespace}" already registered by plugin "${existing.pluginId}"`,
+    };
+  }
+  interactiveHandlers.set(key, {
+    ...registration,
+    namespace,
+    channel: registration.channel,
+    pluginId,
+  });
+  return { ok: true };
+}
+
+export function clearPluginInteractiveHandlers(): void {
+  interactiveHandlers.clear();
+  callbackDedupe.clear();
+}
+
+export function clearPluginInteractiveHandlersForPlugin(pluginId: string): void {
+  for (const [key, value] of interactiveHandlers.entries()) {
+    if (value.pluginId === pluginId) {
+      interactiveHandlers.delete(key);
+    }
+  }
+}
+
+export async function dispatchPluginInteractiveHandler(params: {
+  channel: "telegram";
+  data: string;
+  callbackId: string;
+  ctx: Omit<PluginInteractiveTelegramHandlerContext, "callback" | "respond" | "channel"> & {
+    callbackMessage: {
+      messageId: number;
+      chatId: string;
+      messageText?: string;
+    };
+  };
+  respond: {
+    reply: (params: { text: string; buttons?: PluginInteractiveButtons }) => Promise<void>;
+    editMessage: (params: { text: string; buttons?: PluginInteractiveButtons }) => Promise<void>;
+    editButtons: (params: { buttons: PluginInteractiveButtons }) => Promise<void>;
+    clearButtons: () => Promise<void>;
+    deleteMessage: () => Promise<void>;
+  };
+}): Promise<InteractiveDispatchResult> {
+  const match = resolveNamespaceMatch(params.channel, params.data);
+  if (!match) {
+    return { matched: false, handled: false, duplicate: false };
+  }
+
+  if (callbackDedupe.check(params.callbackId)) {
+    return { matched: true, handled: true, duplicate: true };
+  }
+
+  const { callbackMessage, ...handlerContext } = params.ctx;
+  const result = await match.registration.handler({
+    ...handlerContext,
+    channel: "telegram",
+    callback: {
+      data: params.data,
+      namespace: match.namespace,
+      payload: match.payload,
+      messageId: callbackMessage.messageId,
+      chatId: callbackMessage.chatId,
+      messageText: callbackMessage.messageText,
+    },
+    respond: params.respond,
+  });
+
+  return {
+    matched: true,
+    handled: result?.handled ?? true,
+    duplicate: false,
+  };
+}