Multiple proof upload page

[raphodn]

Story

Following #639 where we added a dedicated "single proof upload" page. Some users want to upload multiple proofs at the same time (proofs with the same type, location, date & currency = Price tags)

How

A dedicated page. Loop on all selected images and upload them one by one.

ProofImageInputRow < ProofInputRow < AddPriceMultiple / AddPriceSingle / ProofAddSingle / (ProofAddMultiple)

[raphodn]

@serpico I just deployed #1043 in staging, if you want to test it out ! https://prices.openfoodfacts.net/proofs/add/multiple

One big caveat I think, is that it doesn't check each image exif if they are indeed from the same date.

[serpico]

I gave it a first try here are a few thoughts/feedback :

• I think we need a note or something to tell the user the "image level" is where it's at ( see screenshot ), I was looking for something at the bottom of the page for how for how to trigger the 2nd, n upload.

• From what I understood I selected 2 pictures ( ctrl + clic ) after clicking on "Select from device gallery" it went smoothly at first but after more careful observation only one appears in the proof ( appear to be effectively uploaded ) , cue only one image appears on the "zoomed preview" ( step 2 - after selecting the pics and pressing Done ).

Q : In case it works and X images are selected and validated in the file manager window should we have an equal number of X of "zoomed preview" images appearing here, like "stacked" ?

• On a second try I got a few error pop pups ( see below )

I'll wait for your answer/advice before going any further

[raphodn]

Thanks for the feedback ! I only tested locally, and sometimes got these errors, I thought I had fixed them but doesn't seem so... I'll give it a try in staging, and do a second PR with some fixes/improvements 👍