app.py

from fastapi.middleware.cors import CORSMiddleware
from fastapi.staticfiles import StaticFiles
from fastapi import APIRouter, FastAPI
import base64, json, zipfile, uvicorn
from strgen import StringGenerator
from pathlib import Path
from io import BytesIO
from PIL import Image

app = FastAPI()

app.add_middleware(
    CORSMiddleware,
    allow_origins=[
        "http://localhost:3000",
        "http://localhost:8000",
        "http://127.0.0.1:3000",
        "http://127.0.0.1:8000",
    ],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

router = APIRouter()

@router.post('/save')
def save(data):
    zip_buffer = BytesIO()
    
    with zipfile.ZipFile(zip_buffer, 'w') as zip_file:
        zip_file.writestr('data.xml', data[0].encode('utf-8'))
        zip_file.writestr('data.txt', data[1].encode('utf-8'))
        
        for i in range(2, len(data)):
            file_data = base64.b64decode(data[i].split(',', 1)[1])
            file_name = f'{i - 1}.{data[i].split(";")[0].split("/")[1]}'
            zip_file.writestr(file_name, file_data)

    zip_buffer.seek(0)
    return base64.b64encode(zip_buffer.getvalue()).decode('utf-8')

@router.post('/load')
def load(zip_data):
    zip_buffer = BytesIO(base64.b64decode(zip_data))
    data = []
    with zipfile.ZipFile(zip_buffer, 'r') as zip_file:
        data.append(zip_file.open('data.xml').read().decode('utf-8'))
        data.append(zip_file.open('data.txt').read().decode('utf-8'))

        for file_info in zip_file.infolist():
            if file_info.filename.startswith('data.'): continue
            with zip_file.open(file_info) as f:
                ext = file_info.filename.split('.')[-1]
                url = base64.b64encode(f.read()).decode('utf-8')
                data.append(f'data:image/{ext};base64,{url}')

    return data

@router.post('/sb3')
def sb3(data):
    # まず、mmp4.zipからproject.jsonを読み込む
    with zipfile.ZipFile('mmp4.zip', 'r') as template_zip:
        with template_zip.open('project.json') as f:
            project = json.loads(f.read().decode('utf-8'))

    # 新しいZIPファイルを作成
    zip_buffer = BytesIO()
    with zipfile.ZipFile(zip_buffer, 'w') as zip_file:
        variables = project['targets'][0]['variables']
        tiles = project['targets'].index([v for v in project['targets'] if v['name'] == 'Tiles'][0])
        
        project['targets'][0]['variables'][[v for v in variables if variables[v][0] == 'MODコード'][0]][1] = data[0]

        names = StringGenerator('[a-f\\d]{32}').render_list(len(data) - 1, unique=True)
        for i in range(1, len(data)):
            name = f'{names[i-1]}.png'
            image_data = base64.b64decode(data[i].split(',', 1)[1])
            
            # 画像をリサイズ
            img = Image.open(BytesIO(image_data))
            img_resized = img.resize((40, 40))
            img_buffer = BytesIO()
            img_resized.save(img_buffer, format='PNG')
            img_buffer.seek(0)

            # リサイズした画像をZIPに追加
            zip_file.writestr(name, img_buffer.getvalue())

            project['targets'][tiles]['costumes'].append({
                "name": str(i),
                "bitmapResolution": 2,
                "dataFormat": "png",
                "assetId": names[i-1],
                "md5ext": f"{names[i-1]}.png",
                "rotationCenterX": 40,
                "rotationCenterY": 40
            })

        # 更新されたproject.jsonを書き込む
        zip_file.writestr('project.json', json.dumps(project).encode('utf-8'))

        # mmp4.zipの他のファイルもコピー
        with zipfile.ZipFile('mmp4.zip', 'r') as template_zip:
            for item in template_zip.infolist():
                if item.filename != 'project.json':
                    zip_file.writestr(item.filename, template_zip.read(item.filename))

    # ZIPファイルのバイナリデータをBase64エンコード
    zip_buffer.seek(0)
    sb3_base64 = base64.b64encode(zip_buffer.getvalue()).decode('utf-8')

    return sb3_base64

app.include_router(router, prefix="/api")

if __name__ == "__main__":
    app.mount("/", StaticFiles(directory=Path('public'), html=True), name='public')
    uvicorn.run(app, host="0.0.0.0", port=8000)