Get the list of tags from a custom code

[freddidierRTE]

Currently, the list of tags for screens are defined in the web-ui.json file. This feature request proposes to load these lists from a custom code executed on demand via the Opfab API.

• A custom function shall provide the list of tags as an array of {label,value}

Example :

 [
    {
      "label": "Label for tag 1",
      "value": "tag1"
    },
    {
      "label": "Label for tag 2",
      "value": "tag2"
    }
  ]

• The function shall be defined in a custom js on opfab loading (using what has been done in Add the possiblity to load custom javascript on startup (#6457) #6466)

• The function shall be registered via a new opfab API function (in ui/main/src/app/business/services/opfabAPI.service.ts) :

opfab.businessconfig.registerFunctionToGetTags(method) 

• The function shall take into parameter the screen name , possible list of screen names are : archives /logging/ processMonitoring

• The function shall be asynchronous and so should return a Promise (this is due to the fact that the method can call a server to get the tags)

• Each screen shall call this registered function via OpfabAPIService to get tags , if the function return undefined , the screen use tags defined in web-ui.json as in the actual implementation

• Register a custom function to get tag is optional so OpfabAPIService should define a default implementation returning undefined

• As an example : modify config/docker/externalJs/example.js to register a function that return a list of tags (hardcoded in the function itself) if screenName is processMonitoring otherwise undefined

• Add in documentation in https://opfab.github.io/documentation/current/reference_doc/#_frontend_api in a new chapter businessConfig API