| """The bank the app serves: the math content file plus the lessons published in the database (add-subjects-and-worksheets). |
| |
| The file's bank is kept as `app.state.base_bank`. `rebuild` reads the subjects and the published lessons and swaps a new merged |
| bank into `app.state.bank` in one step, at start-up and after every publish, unpublish or reorder, so a change reaches students |
| without a restart; a request already running keeps the bank it started with. When the database cannot be read (the subjects |
| migration not applied yet, or the database down at start-up) the file's lessons are served alone and the reason is kept in |
| `app.state.content_error` for the content screens. If building a new bank fails, the bank already served stays. |
| """ |
| from __future__ import annotations |
|
|
| import logging |
|
|
| from .bank import Bank, merge |
|
|
| log = logging.getLogger("mathly2.content") |
|
|
|
|
| def _raw(store): |
| return getattr(store, "_store", store) |
|
|
|
|
| def rebuild(app) -> Bank: |
| """Build and serve the merged bank. Returns the bank now served. Raises only if building fails while the database answered.""" |
| base = app.state.base_bank |
| try: |
| store = _raw(app.state.store) |
| subjects, lessons = store.subjects(), store.published_lessons() |
| except Exception as exc: |
| log.warning("subjects and lessons could not be read, serving the content file only: %s", exc) |
| app.state.content_error = str(exc) or type(exc).__name__ |
| if not hasattr(app.state, "bank") or app.state.bank is base: |
| app.state.bank = Bank(merge(base.data, [], [])) |
| return app.state.bank |
| bank = Bank(merge(base.data, subjects, lessons, log=log.warning)) |
| app.state.bank = bank |
| app.state.content_error = None |
| return bank |
|
|
