Reorganize Python stuff and add command to create packs

Fixes #11

sticker/lib/matrix.py

@@ -0,0 +1,77 @@
+# Copyright (c) 2020 Tulir Asokan
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+from typing import Optional, TYPE_CHECKING
+import json
+
+from aiohttp import ClientSession
+from yarl import URL
+
+access_token: Optional[str] = None
+homeserver_url: Optional[str] = None
+
+upload_url: Optional[URL] = None
+
+if TYPE_CHECKING:
+    from typing import TypedDict
+
+
+    class MediaInfo(TypedDict):
+        w: int
+        h: int
+        size: int
+        mimetype: str
+        thumbnail_url: Optional[str]
+        thumbnail_info: Optional['MediaInfo']
+
+
+    class StickerInfo(TypedDict, total=False):
+        body: str
+        url: str
+        info: MediaInfo
+        id: str
+else:
+    MediaInfo = None
+    StickerInfo = None
+
+
+async def load_config(path: str) -> None:
+    global access_token, homeserver_url, upload_url
+    try:
+        with open(path) as config_file:
+            config = json.load(config_file)
+            homeserver_url = config["homeserver"]
+            access_token = config["access_token"]
+    except FileNotFoundError:
+        print("Matrix config file not found. Please enter your homeserver and access token.")
+        homeserver_url = input("Homeserver URL: ")
+        access_token = input("Access token: ")
+        whoami_url = URL(homeserver_url) / "_matrix" / "client" / "r0" / "account" / "whoami"
+        user_id = await whoami(whoami_url, access_token)
+        with open(path, "w") as config_file:
+            json.dump({
+                "homeserver": homeserver_url,
+                "user_id": user_id,
+                "access_token": access_token
+            }, config_file)
+        print(f"Wrote config to {path}")
+
+    upload_url = URL(homeserver_url) / "_matrix" / "media" / "r0" / "upload"
+
+
+async def whoami(url: URL, access_token: str) -> str:
+    headers = {"Authorization": f"Bearer {access_token}"}
+    async with ClientSession() as sess, sess.get(url, headers=headers) as resp:
+        resp.raise_for_status()
+        user_id = (await resp.json())["user_id"]
+        print(f"Access token validated (user ID: {user_id})")
+        return user_id
+
+
+async def upload(data: bytes, mimetype: str, filename: str) -> str:
+    url = upload_url.with_query({"filename": filename})
+    headers = {"Content-Type": mimetype, "Authorization": f"Bearer {access_token}"}
+    async with ClientSession() as sess, sess.post(url, data=data, headers=headers) as resp:
+        return (await resp.json())["content_uri"]