|
| 1 | +import hashlib |
| 2 | +import hmac |
| 3 | +import json |
| 4 | +from typing import Any |
| 5 | + |
| 6 | +import frappe |
| 7 | +import httpx |
| 8 | +from werkzeug.wrappers import Response |
| 9 | + |
| 10 | +from raven.omni_channel_chat.doctype.omni_channel_chat_provider.provider import ( |
| 11 | + Provider, |
| 12 | +) |
| 13 | + |
| 14 | +InstagramMessagingEvent = dict[str, Any] |
| 15 | + |
| 16 | + |
| 17 | +class InstagramProvider(Provider[InstagramMessagingEvent, dict]): |
| 18 | + IG_API_URL = "https://graph.instagram.com/v25.0/me/messages" |
| 19 | + |
| 20 | + def __init__(self, config): |
| 21 | + super().__init__(config=config) |
| 22 | + self._page_access_token = self.provider_config.ig_page_access_token |
| 23 | + self._app_secret = self.provider_config.ig_app_secret |
| 24 | + self._verify_token = self.provider_config.ig_verify_token |
| 25 | + |
| 26 | + def handle_frappe_api(self) -> Response: |
| 27 | + request = frappe.local.request |
| 28 | + |
| 29 | + if request.method == "GET": |
| 30 | + mode = frappe.form_dict.get("hub.mode") |
| 31 | + verify_token = frappe.form_dict.get("hub.verify_token") |
| 32 | + challenge = frappe.form_dict.get("hub.challenge", "0") |
| 33 | + |
| 34 | + if mode == "subscribe" and verify_token == self._verify_token: |
| 35 | + return Response(challenge, status=200, content_type="text/plain") |
| 36 | + else: |
| 37 | + frappe.throw("Verification failed", frappe.PermissionError) |
| 38 | + |
| 39 | + body: bytes = request.get_data() |
| 40 | + headers: dict = dict(request.headers) |
| 41 | + |
| 42 | + return self.handle_webhook(body=body, headers=headers) |
| 43 | + |
| 44 | + def _verify_signature(self, body: bytes, signature_header: str) -> bool: |
| 45 | + if not signature_header.startswith("sha256="): |
| 46 | + return False |
| 47 | + expected = hmac.new(self._app_secret.encode(), body, hashlib.sha256).hexdigest() |
| 48 | + return hmac.compare_digest(expected, signature_header.removeprefix("sha256=")) |
| 49 | + |
| 50 | + def get_user_info(self, user_id: str) -> dict: |
| 51 | + with httpx.Client() as client: |
| 52 | + response = client.get( |
| 53 | + f"https://graph.facebook.com/v22.0/{user_id}", |
| 54 | + params={ |
| 55 | + "fields": "name,profile_pic", |
| 56 | + "access_token": self._page_access_token, |
| 57 | + }, |
| 58 | + ) |
| 59 | + response.raise_for_status() |
| 60 | + data = response.json() |
| 61 | + return { |
| 62 | + "user_id": user_id, |
| 63 | + "display_name": data.get("name"), |
| 64 | + "picture_url": data.get("profile_pic"), |
| 65 | + } |
| 66 | + |
| 67 | + def show_typing(self, user_id: str) -> None: |
| 68 | + with httpx.Client() as client: |
| 69 | + client.post( |
| 70 | + self.IG_API_URL, |
| 71 | + params={"access_token": self._page_access_token}, |
| 72 | + json={"recipient": {"id": user_id}, "sender_action": "typing_on"}, |
| 73 | + ) |
| 74 | + |
| 75 | + def send_reply(self, user_id: str, message: dict, context: Any) -> None: |
| 76 | + self.send_message(user_id=user_id, message=message) |
| 77 | + |
| 78 | + def send_message(self, user_id: str, message: dict) -> None: |
| 79 | + msg_type = message.get("type", "Text") |
| 80 | + if msg_type == "Image": |
| 81 | + ig_message = { |
| 82 | + "attachment": { |
| 83 | + "type": "image", |
| 84 | + "payload": {"url": message["file_url"], "is_reusable": True}, |
| 85 | + } |
| 86 | + } |
| 87 | + elif msg_type == "File": |
| 88 | + ig_message = { |
| 89 | + "attachment": { |
| 90 | + "type": "file", |
| 91 | + "payload": {"url": message["file_url"], "is_reusable": True}, |
| 92 | + } |
| 93 | + } |
| 94 | + else: |
| 95 | + ig_message = {"text": message["text"]} |
| 96 | + with httpx.Client() as client: |
| 97 | + client.post( |
| 98 | + self.IG_API_URL, |
| 99 | + params={"access_token": self._page_access_token}, |
| 100 | + json={"recipient": {"id": user_id}, "message": ig_message}, |
| 101 | + ) |
| 102 | + |
| 103 | + def _download_attachment(self, url: str, default_name: str) -> tuple[bytes, str]: |
| 104 | + with httpx.Client() as client: |
| 105 | + response = client.get(url) |
| 106 | + response.raise_for_status() |
| 107 | + content_disposition = response.headers.get("content-disposition", "") |
| 108 | + file_name = default_name |
| 109 | + if "filename=" in content_disposition: |
| 110 | + file_name = content_disposition.split("filename=")[-1].strip('" ') |
| 111 | + return response.content, file_name |
| 112 | + |
| 113 | + def event_mapper(self, event: InstagramMessagingEvent) -> dict | None: |
| 114 | + message = event.get("message") |
| 115 | + if message is None: |
| 116 | + return None |
| 117 | + |
| 118 | + mid = message.get("mid") |
| 119 | + |
| 120 | + if "text" in message: |
| 121 | + return { |
| 122 | + "provider": self.provider_config.provider, |
| 123 | + "user_id": event["sender"]["id"], |
| 124 | + "message": {"type": "Text", "text": message["text"]}, |
| 125 | + "message_metadata": {"mid": mid}, |
| 126 | + } |
| 127 | + |
| 128 | + for attachment in message.get("attachments") or []: |
| 129 | + att_type = attachment.get("type") |
| 130 | + url = attachment.get("payload", {}).get("url") |
| 131 | + if not url: |
| 132 | + continue |
| 133 | + if att_type == "image": |
| 134 | + content, file_name = self._download_attachment(url, f"{mid or 'image'}.jpg") |
| 135 | + return { |
| 136 | + "provider": self.provider_config.provider, |
| 137 | + "user_id": event["sender"]["id"], |
| 138 | + "message": {"type": "Image", "file_name": file_name, "file_content": content}, |
| 139 | + "message_metadata": {"mid": mid}, |
| 140 | + } |
| 141 | + if att_type in ("file", "video", "audio"): |
| 142 | + content, file_name = self._download_attachment(url, mid or "file") |
| 143 | + return { |
| 144 | + "provider": self.provider_config.provider, |
| 145 | + "user_id": event["sender"]["id"], |
| 146 | + "message": {"type": "File", "file_name": file_name, "file_content": content}, |
| 147 | + "message_metadata": {"mid": mid}, |
| 148 | + } |
| 149 | + |
| 150 | + return None |
| 151 | + |
| 152 | + def standardize_events(self, events: list[InstagramMessagingEvent]) -> list[dict]: |
| 153 | + std_events: list[dict] = [] |
| 154 | + for event in events: |
| 155 | + std_event = self.event_mapper(event) |
| 156 | + if std_event: |
| 157 | + std_events.append(std_event) |
| 158 | + return std_events |
| 159 | + |
| 160 | + def extract_messages(self, body: bytes, headers: dict) -> list[dict]: |
| 161 | + signature = headers.get("X-Hub-Signature-256", "") or headers.get( |
| 162 | + "x-hub-signature-256", "" |
| 163 | + ) |
| 164 | + if not self._verify_signature(body, signature): |
| 165 | + frappe.throw("Invalid Instagram signature", frappe.PermissionError) |
| 166 | + |
| 167 | + payload = json.loads(body) |
| 168 | + if payload.get("object") != "instagram": |
| 169 | + frappe.throw("Not an Instagram event", frappe.ValidationError) |
| 170 | + |
| 171 | + messaging_events: list[InstagramMessagingEvent] = [ |
| 172 | + messaging_event |
| 173 | + for entry in payload.get("entry", []) |
| 174 | + for messaging_event in entry.get("messaging", []) |
| 175 | + ] |
| 176 | + return self.standardize_events(messaging_events) |
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