matrix-stickers/sticker/lib/util.py
2021-01-27 23:31:33 +01:00

79 lines
2.6 KiB
Python

# maunium-stickerpicker - A fast and simple Matrix sticker picker widget.
# Copyright (C) 2020 Tulir Asokan
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
from functools import partial
from io import BytesIO
import os.path
import json
from PIL import Image
from . import matrix
open_utf8 = partial(open, encoding='UTF-8')
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_utf8(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_utf8(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",
},
},
}