feat: 5553 - add prices for category products

[monsieurtanuki]

What

• Now when we add prices, we can add prices related to a category (e.g. "apples") instead of barcode

Screenshots

new "category input" button	new "category input" page

new "price per" button	category price input

Fixes bug(s)

• Closes: Allow to add prices of products without barcode #5553

Files

New files:

• price_category_input_page.dart: Page that lets the user type in and select a single category for prices.
• price_per_extension.dart: Extension for PricePer.

Impacted files:

• app_en.arb: added 4 labels related to category and prices
• app_fr.arb: added 4 labels related to category and prices
• background_task_add_other_price.dart: added parameters related to category prices
• background_task_add_price.dart: added parameters related to category prices
• background_task_price.dart: added parameters related to category prices
• price_add_product_card.dart: added an "add category product" button
• price_amount_card.dart: added a DropDownButton for "price per" for category product
• price_amount_model.dart: taken category prices into consideration
• price_existing_amount_card.dart: unrelated localization
• price_meta_product.dart: added a new meta product, related to category
• price_model.dart: added parameters related to category prices
• smooth_autocomplete_text_field.dart: added an "onSelected" optional parameter, in order to be able to select immediately a suggestion
• smooth_dropdown.dart: added an "isExpanded" optional parameter, in order to match the screen width

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 1.05263% with 94 lines in your changes missing coverage. Please review.

Project coverage is 5.83%. Comparing base (4d9c7fc) to head (2664751).
Report is 837 commits behind head on develop.

Files with missing lines	Patch %	Lines
...pp/lib/pages/prices/price_category_input_page.dart	2.94%	33 Missing ⚠️
...h_app/lib/pages/prices/price_add_product_card.dart	0.00%	13 Missing ⚠️
...ooth_app/lib/background/background_task_price.dart	0.00%	11 Missing ⚠️
...smooth_app/lib/pages/prices/price_amount_card.dart	0.00%	11 Missing ⚠️
...mooth_app/lib/pages/prices/price_meta_product.dart	0.00%	6 Missing ⚠️
...ooth_app/lib/pages/prices/price_per_extension.dart	0.00%	6 Missing ⚠️
...ib/pages/input/smooth_autocomplete_text_field.dart	0.00%	5 Missing ⚠️
...kages/smooth_app/lib/pages/prices/price_model.dart	0.00%	4 Missing ⚠️
.../lib/pages/prices/price_existing_amount_field.dart	0.00%	2 Missing ⚠️
...mooth_app/lib/pages/prices/price_amount_model.dart	0.00%	1 Missing ⚠️
... and 2 more

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #6552      +/-   ##
==========================================
- Coverage     9.54%   5.83%   -3.72%     
==========================================
  Files          325     501     +176     
  Lines        16411   29909   +13498     
==========================================
+ Hits          1567    1745     +178     
- Misses       14844   28164   +13320     

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[TTalex]

Very cool, some thoughts:

• Maybe the "Enter a category" text can be replace with something like "Add a product without barcode" ? We have the same issue in prices web, the category term isn't clear for new users.
• The API also supports fields like organic (is the product organic) and orgin (where is the product from). They aren't mandatory, but useful for data quality. Maybe something to add in a V2.
• More of a taxonomy issue, but it would be nice to only suggest categories related to products without barcodes (fruits and vegetables)

[monsieurtanuki]

Thank you @TTalex for your feedback!

Maybe the "Enter a category" text can be replace with something like "Add a product without barcode" ? We have the same issue in prices web, the category term isn't clear for new users.

I can do that.
Fun fact: yesterday I was in a French store (monoprix) and there were tourists trying to weight a melon on a machine. They couldn't find the "melon" button. I told the guy he won't manage to do that and he replied something like "but there's no barcode!". In that case the price was per unit. The concept of "no barcode" may indeed be relevant.

The API also supports fields like organic (is the product organic) and orgin (where is the product from). They aren't mandatory, but useful for data quality. Maybe something to add in a V2.

I'm not sure I'm going to do that right now, UX-wise.
I'm going to populate those extra fields, though, for internal reasons.

• More of a taxonomy issue, but it would be nice to only suggest categories related to products without barcodes (fruits and vegetables)

I'm sure they sell "home-made muesli" so it wouldn't be a good idea to limit to fruits and vegetables.
As a matter of fact, my first addition was a fish.