Initial import

packages/providers/src/telegram.ts

@@ -0,0 +1,88 @@
+export interface TelegramUpdateUser {
+  id: number;
+  username?: string;
+  first_name: string;
+  last_name?: string;
+}
+
+export interface TelegramUpdateMessage {
+  message_id: number;
+  text?: string;
+  from?: TelegramUpdateUser;
+  chat: {
+    id: number;
+  };
+}
+
+export interface TelegramUpdate {
+  update_id: number;
+  message?: TelegramUpdateMessage;
+}
+
+export interface TelegramBotTransport {
+  getUpdates(input: {
+    offset?: number;
+    timeoutSeconds: number;
+  }): Promise<TelegramUpdate[]>;
+  sendMessage(input: {
+    chatId: number;
+    text: string;
+  }): Promise<void>;
+}
+
+export function createTelegramBotApiTransport(botToken: string): TelegramBotTransport {
+  const baseUrl = `https://api.telegram.org/bot${botToken}`;
+
+  return {
+    async getUpdates({ offset, timeoutSeconds }) {
+      const response = await fetch(`${baseUrl}/getUpdates`, {
+        method: "POST",
+        headers: {
+          "content-type": "application/json",
+        },
+        body: JSON.stringify({
+          timeout: timeoutSeconds,
+          ...(offset !== undefined ? { offset } : {}),
+        }),
+      });
+
+      const payload = (await response.json()) as {
+        ok: boolean;
+        result?: TelegramUpdate[];
+        description?: string;
+      };
+
+      if (!response.ok || !payload.ok || !payload.result) {
+        throw new Error(
+          payload.description ?? `Telegram getUpdates failed with status ${response.status}.`,
+        );
+      }
+
+      return payload.result;
+    },
+
+    async sendMessage({ chatId, text }) {
+      const response = await fetch(`${baseUrl}/sendMessage`, {
+        method: "POST",
+        headers: {
+          "content-type": "application/json",
+        },
+        body: JSON.stringify({
+          chat_id: chatId,
+          text,
+        }),
+      });
+
+      const payload = (await response.json()) as {
+        ok: boolean;
+        description?: string;
+      };
+
+      if (!response.ok || !payload.ok) {
+        throw new Error(
+          payload.description ?? `Telegram sendMessage failed with status ${response.status}.`,
+        );
+      }
+    },
+  };
+}