Fix Flask WebAPP paths to be project-root anchored

[arvinder004]

Summary

This PR fixes a bug where the Flask app failed to locate index.html (and other WebAPP assets) when run from the API/ directory due to cwd‑dependent paths in both API/app.py and API/Classes/Base/Config.py. All relevant paths are now anchored to the project root using PROJECT_ROOT and Config.WebAPP_PATH, making template and static file resolution consistent across environments.

Changes

1. Make WebAPP paths project-root anchored in Config.py

File: API/Classes/Base/Config.py

Before (lines 23–29):

UPLOAD_FOLDER = Path('WebAPP')
WebAPP_PATH = Path('WebAPP')
DATA_STORAGE = Path("WebAPP", 'DataStorage')
CLASS_FOLDER = Path("WebAPP", 'Classes')
EXTRACT_FOLDER = Path("")
SOLVERs_FOLDER = Path('WebAPP', 'SOLVERs')

After (lines 23–29):

PROJECT_ROOT = Path(__file__).resolve().parent.parent.parent.parent
UPLOAD_FOLDER = PROJECT_ROOT / 'WebAPP'
WebAPP_PATH = PROJECT_ROOT / 'WebAPP'
DATA_STORAGE = PROJECT_ROOT / 'WebAPP' / 'DataStorage'
CLASS_FOLDER = PROJECT_ROOT / 'WebAPP' / 'Classes'
EXTRACT_FOLDER = PROJECT_ROOT
SOLVERs_FOLDER = PROJECT_ROOT / 'WebAPP' / 'SOLVERs'

• Introduces PROJECT_ROOT based on __file__, independent of the current working directory.
• All WebAPP-related paths are now absolute and rooted at the project directory.

2. Configure Flask to use Config.WebAPP_PATH for templates and static files

File: API/App.py

Before:

template_dir = os.path.abspath('WebAPP')
static_dir = os.path.abspath('WebAPP')

app = Flask(
    __name__,
    static_url_path='',
    static_folder=static_dir,
    template_folder=template_dir,
)

After:

from Classes.Base import Config

template_dir = str(Config.WebAPP_PATH.resolve())
static_dir = str(Config.WebAPP_PATH.resolve())

app = Flask(
    __name__,
    static_url_path='',
    static_folder=static_dir,
    template_folder=template_dir,
)

• Flask now uses the same project-root anchored WebAPP path as defined in Config.py.
• render_template('index.html') correctly resolves WebAPP/index.html regardless of where the app is launched from.

Related issues

• Closes [Bug] Flask cannot find index.html due to cwd‑dependent WebAPP paths #29

Checklist

• Paths in Config.py no longer depend on the current working directory.
• Flask template/static configuration uses Config.WebAPP_PATH.
• Manual testing from both project root and API/ succeeds.

[SeaCelo]

Thanks @arvinder004. The project-root anchoring pattern you introduced here has been incorporated into the mac-port branch, which applies the same approach across the full codebase.

Closing as superseded. Appreciate the contribution.