main.py

"""Main Python application file for the EEL-CRA demo.

To build for production:
npm run build
python -m eel main.py dist_vite --onefile --splash splashfile.png --path env/lib/site-packages --noconsole
"""

import os
import platform
import random
import sys
import importlib
import socket, errno
from py_src.contrib.replace_in_file import replaceInfile, findFileRe
from py_src.contrib.port_check import find_unused_port

import eel

if '_PYIBoot_SPLASH' in os.environ and importlib.util.find_spec("pyi_splash"):
    import pyi_splash
    pyi_splash.update_text('UI Loaded ...')
    pyi_splash.close()


@eel.expose  # Expose function to JavaScript
def say_hello_py(x):
    """Print message from JavaScript on app initialization, then call a JS function."""
    print('Hello from %s' % x)  # noqa T001
    eel.say_hello_js('Python {from within say_hello_py()}!')


@eel.expose
def expand_user(folder):
    """Return the full path to display in the UI."""
    return '{}/*'.format(os.path.expanduser(folder))


@eel.expose
def pick_file(folder):
    """Return a random file from the specified folder."""
    folder = os.path.expanduser(folder)
    if os.path.isdir(folder):
        listFiles = [_f for _f in os.listdir(folder) if not os.path.isdir(os.path.join(folder, _f))]
        if len(listFiles) == 0:
            return 'No Files found in {}'.format(folder)
        return random.choice(listFiles)
    else:
        return '{} is not a valid folder'.format(folder)


def start_eel(develop):
    """Start Eel with either production or development configuration."""

    if develop:
        directory = 'web_src'
        app = None
        page = {'port': 5173}
        eel_port = 5169
    else:
        directory = 'dist_vite'
        app = 'chrome'
        page = 'index.html'

        # find a unused port to host the eel server/websocket
        eel_port = find_unused_port()

        # replace the port in the web files
        replace_file = findFileRe("./dist_vite/assets", "index.*.js")
        replaceInfile(f"./dist_vite/assets/{replace_file}", 'ws://localhost:....', f"ws://localhost:{eel_port}")
        replaceInfile("./dist_vite/index.html", 'http://localhost:.....eel.js', f"http://localhost:{eel_port}/eel.js")

    

    

    eel.init(directory, ['.tsx', '.ts', '.jsx', '.js', '.html'])

    # These will be queued until the first connection is made, but won't be repeated on a page reload
    say_hello_py('Python World!')
    eel.say_hello_js('Python World!')   # Call a JavaScript function (must be after `eel.init()`)

    eel.show_log('https://github.com/samuelhwilliams/Eel/issues/363 (show_log)')

    

    eel_kwargs = dict(
        host='localhost',
        port=eel_port,
        size=(1280, 800),
    )
    try:
        eel.start(page, mode=app, **eel_kwargs)
 
    except EnvironmentError:
        # If Chrome isn't found, fallback to Microsoft Edge on Win10 or greater
        if sys.platform in ['win32', 'win64'] and int(platform.release()) >= 10:
            eel.start(page, mode='edge', **eel_kwargs)
        else:
            raise






    


if __name__ == '__main__':
    import sys

    # Pass any second argument to enable debugging
    start_eel(develop=len(sys.argv) == 2)