Bug: ECDC's data has changed

[raymas]

The first dataset is now broken: no plot are displayed

Current behavior

• [X] static-dashboard.js@68 requests data from https://opendata.ecdc.europa.eu/covid19/casedistribution/csv via CORS anywhere.
• [X] static-dashboard.js@675 parse data returning an array of objects.
• [ ] static-dashboard.js@398 parse data to a plotly compatible format.

This last step produces an error about undefined cases variable :

Uncaught TypeError: cases is undefined
    updateNumbers https://www.coviddash.app/static-dashboard.js:423
    plotGraph https://www.coviddash.app/static-dashboard.js:844
    <anonymous> https://www.coviddash.app/static-dashboard.js:84
    send https://cdn.plot.ly/plotly-latest.min.js:20
    n https://cdn.plot.ly/plotly-latest.min.js:20
    f https://cdn.plot.ly/plotly-latest.min.js:20
static-dashboard.js:423:9

Workaround

Commit 6aed3ac491af18b0af81a5b1ca2929d252cc5e45 add a banner for this issue.

Causes

As explained by the above commit:

The ecdc daily number of new cases reported has shifted to a weekly data collection since the 14th of decembre (source).

The downloadable data file contains information on the 14-day notification rate of newly reported COVID-19 cases per 100 000 population and the 14-day notification rate of reported deaths per million population by week and country. Each row contains the corresponding data for a certain day and per country. The file is updated weekly. You may use the data in line with ECDC’s copyright policy.

Possible solution

Delete the ecdc choice from the dashboard.

[raymas]

@krusty-is-cool what are your plans on this?

[krusty-is-cool]

Thank you @raymas for openning this issue.

As you saw, I quickly added an alert banner to inform user. This is highly temporary.

Step 1

• [x] Remove ECDC dataset choice and set Johns Hopkins University CSSE as the default dataset.

Step 2

• [x] Major update for the app's back-end. Key features:
• being able to trigger alerts and notifications from the VM instead of having to commit changes on Github
• notifying the service worker when a new version of the dashboard is available so it could renew the cache. I expect it helps with issue #10

Step 3

• [ ] Wait the next update of ECDC dataset to evaluate the relevance of displaying a weekly updated dataset and bringing back ECDC dataset.

[krusty-is-cool]

Commit d2ff24518dbb78a4cc76e399320091586f6534f6 accomplishes Step 1 of fix.