3 files changed, 144 insertions, 0 deletions
diff --git a/sticker/lib/__init__.py b/sticker/lib/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/sticker/lib/__init__.py
diff --git a/sticker/lib/matrix.py b/sticker/lib/matrix.py
new file mode 100644
index 0000000..426bdd0
--- /dev/null
+++ b/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"]
diff --git a/sticker/lib/util.py b/sticker/lib/util.py
new file mode 100644
index 0000000..feefea2
--- /dev/null
+++ b/sticker/lib/util.py
@@ -0,0 +1,67 @@
+# 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 io import BytesIO
+import os.path
+import json
+
+from PIL import Image
+
+from . import matrix
+
+
+def convert_image(data: bytes) -> (bytes, int, int):
+    image: Image.Image = Image.open(BytesIO(data)).convert("RGBA")
+    new_file = BytesIO()
+    image.save(new_file, "png")
+    w, h = image.size
+    if w > 256 or h > 256:
+        # Set the width and height to lower values so clients wouldn't show them as huge images
+        if w > h:
+            h = int(h / (w / 256))
+            w = 256
+        else:
+            w = int(w / (h / 256))
+            h = 256
+    return new_file.getvalue(), w, h
+
+
+def add_to_index(name: str, output_dir: str) -> None:
+    index_path = os.path.join(output_dir, "index.json")
+    try:
+        with open(index_path) as index_file:
+            index_data = json.load(index_file)
+    except (FileNotFoundError, json.JSONDecodeError):
+        index_data = {"packs": []}
+    if "homeserver_url" not in index_data and matrix.homeserver_url:
+        index_data["homeserver_url"] = matrix.homeserver_url
+    if name not in index_data["packs"]:
+        index_data["packs"].append(name)
+        with open(index_path, "w") as index_file:
+            json.dump(index_data, index_file, indent="  ")
+        print(f"Added {name} to {index_path}")
+
+
+def make_sticker(mxc: str, width: int, height: int, size: int,
+                 body: str = "") -> matrix.StickerInfo:
+    return {
+        "body": body,
+        "url": mxc,
+        "info": {
+            "w": width,
+            "h": height,
+            "size": size,
+            "mimetype": "image/png",
+
+            # Element iOS compatibility hack
+            "thumbnail_url": mxc,
+            "thumbnail_info": {
+                "w": width,
+                "h": height,
+                "size": size,
+                "mimetype": "image/png",
+            },
+        },
+    }