Summary:
With this, a custom widget can render an attachment by doing:
```
const tokenInfo = await grist.docApi.getAccessToken({readOnly: true});
const img = document.getElementById('the_image');
const id = record.C[0]; // get an id of an attachment
const src = `${tokenInfo.baseUrl}/attachments/${id}/download?auth=${tokenInfo.token}`;
img.setAttribute('src', src)
```
The access token expires after a few mins, so if a user right-clicks on an image
to save it, they may get access denied unless they refresh the page. A little awkward,
but s3 pre-authorized links behave similarly and it generally isn't a deal-breaker.
Test Plan: added tests
Reviewers: dsagal
Reviewed By: dsagal
Subscribers: dsagal
Differential Revision: https://phab.getgrist.com/D3488
Summary: This makes an equivalent of the /records REST endpoint available within custom widgets. For simple operations, it is compatible with https://github.com/airtable/airtable.js/. About half of the diff is refactoring code from DocApi that implements /records using applyUserActions, to make that code available in the plugin api.
Test Plan: added tests
Reviewers: alexmojaki
Reviewed By: alexmojaki
Differential Revision: https://phab.getgrist.com/D3320
Summary:
This simplifies writing custom widgets that access selected
data. To access the record at which the cursor is set, and
get any future changes to it as the cursor moves or data
changes, it suffices now to do:
```
grist.ready();
grist.onRecord(record => /* render */);
```
Similarly to access the set of selected records, and get any
changes, it suffices now to do:
```
grist.ready();
grist.onRecords(records => /* render */);
```
The `records` argument will be a list of objects, each of which
is a single record. This is distinct from the column-based
representation favored in Grist up ontil now. That remains
how methods like `fetchTable` or `fetchSelectedTable` represent
their results. In the future, methods named like `fetchRecords`
or `fetchSelectedRecords` could be added that return lists.
Test Plan: extended tests
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2583
Summary: This moves enough server material into core to run a home server. The data engine is not yet incorporated (though in manual testing it works when ported).
Test Plan: existing tests pass
Reviewers: dsagal
Reviewed By: dsagal
Differential Revision: https://phab.getgrist.com/D2552
