Add a "Clear all" button on Nutritional info

[g123k]

Hi everyone,

As a contributor, I often have to change the nutritional values on existing products, due to new recipes.
In many cases, there are 2 digits to change for each field.

And on iOS, that's really a pain to edit each value.
If we could instead clear all the data, it would be a far better UX.

Part of

• Nutrition input (Tracker) #511

[teolemon]

We can certainly add a "Clear all values". We have a similar button on the web version, I'm not completely sure we made it available to all users (potential for abuse)

[g123k]

We can certainly add a "Clear all values". We have a similar button on the web version, I'm not completely sure we made it available to all users (potential for abuse)

What about a setting in the app? Disabled by default, but we can override it

[teolemon]

LGTM

[g123k]

I often have the case and the DEV mode would be frustrating, as nobody will ever use it.

However, here is a suggestion for a smarter implementation: if we detect that the user has changed let's say 2 or 3 items, in that case, we show a message (popup? icon?) asking if we want to clear the other fields in the screen.
So we will just clear, the items that HAVE NOT been edited yet

Just to be clear, only items that have not been edited will be emptied.
What do you think of this idea?

[teolemon]

@g123k Sounds reasonable.
Eventually, we could leverage quality facets:

• https://world.openfoodfacts.org/data-quality-error/nutrition-values-are-all-identical
• https://world.openfoodfacts.org/data-quality-error/nutrition-errors

Even for new products, we could send values to a To be created™ route, that could send back potential errors and warnings in real time

EDIT: created an issue: openfoodfacts/openfoodfacts-server#9710