Implement Search V2 API to the fullest

[teolemon]

What

• Implement Search V2 API to the fullest
• https://wiki.openfoodfacts.org/Open_Food_Facts_Search_API_Version_2
• https://github.com/openfoodfacts/openfoodfacts-server/blob/main/cgi/search.pl (reference)
  • API v2: sort_by=ecoscore_score #517
  • API v2: ingredients_analysis_tags=en:vegan #524
  • API v2: states_tags=en:origins-completed,en:packaging-to-be-completed #531
  • https://fr.openfoodfacts.org/api/v2/search?fields=code,product_name,knowledge_panels&page_size=1000 (already available)
  • https://world.openfoodfacts.org/api/v2/search?categories_tags=en:hazelnut-spreads&fields=id,categories_tags
  • https://world.openfoodfacts.net/api/v2/search?page_size=10&fields=id,image_front_url (already available)
  • API v2: sort_by=last_modified_t #523
  • https://nl.openfoodfacts.org/api/v2/search?ingredients_analysis_tags=en:vegan&stores_tags=Delhaize&fields=code
  • https://openfoodfacts.org/api/v2/search?code=3352915400008&page_size=1&no_cache=1&fields=code,product_name,ecoscore_extended_data
  • https://openfoodfacts.net/api/v2/search?states_tags=en:ingredients-completed,en:nutrition-facts-completed&misc_tags=-en:ecoscore-extended-data-version-2&fields=code&page_size=1&sort_by=nothing&no_cache=1
  • API v2 for multi barcode search #516
  • API v2: allergens_tags:=-en:gluten #526
  • API v2: salt_100g=%3E10&salt_100g=%3C15 #530

Tag types

• tag:brands - possible values: infinite, json taxo but no autosuggest
• tag:categories - possible values: finite, json taxo + autosuggest + partial taxo API
• tag:packaging - display:packaging - packaging
• tag:labels - possible values: finite, json taxo + autosuggest + partial taxo API
• tag:origins - display:origins of ingredients - origins of ingredients
• tag:manufacturing_places - display:manufacturing or processing places - manufacturing or processing places
• tag:emb_codes - display:packager codes - packager codes
• tag:purchase_places - display:purchase places - purchase places
• tag:stores - display:stores - stores
• tag:countries - possible values: finite (190), json taxo + autosuggest + partial taxo API
• tag:ingredients -possible values: finite, json taxo + autosuggest + partial taxo API
• tag:additives - possible values: finite, json taxo + autosuggest + partial taxo API
• tag:allergens - possible values: finite, json taxo + autosuggest + partial taxo API
• tag:traces - possible values: finite, json taxo + autosuggest + partial taxo API
• tag:nutrition_grades possible values: finite (a,b,c,d,e) , json taxo + autosuggest + partial taxo API
• nova_groups search parameter #539
• tag:languages - possible values: finite, json taxo + autosuggest + partial taxo API
• tag:creator - possible values: infinite - we can't really suggest anything (or we have to rely on the facet)
• tag:editors - possible values: infinite - we can't really suggest anything (or we have to rely on the facet)
• tag:states - possible values: finite, json taxo + autosuggest + partial taxo API

Output types

Product list

Map

• map_title
• my $map = single_param("generate_map") || '';

Graph

• graph_title
• axis_x
• axis_y
• my $graph = single_param("graph") || '';

Download

• my $download = single_param("download") || '';

See also

• 🔍 Search (tracker) smooth-app#991

[teolemon]

cc @monsieurtanuki @M123-dev @g123k

• related to Create a visual interface for advanced search filtering smooth-app#1371

[teolemon]

@monsieurtanuki I added a normalized tags list

[teolemon]

additives : with, without, indifferent
We could have a suggested values for those: https://github.com/openfoodfacts/openfoodfacts-dart/blob/55f3fa583a535ec842db87067019ed2933f75a78/lib/model/parameter/TagFilter.dart
like 1,2,3,4 for nova_groups (note those values are available in the taxonomies, most of the time)

[teolemon]

I added some missing link to the wiki documentation, that should clarify a number of things

[teolemon]

As a FYI, We're going to swap the backend providing the Product Opener search to the Elastic one, but the API should stay the same.
cc @raphael0202 @alexgarel @monsieurtanuki

[teolemon]

Actually, I just got word that we should aim for the newer API.