Add value picker JEXL function

mapedraza commented 1 month ago

This function picks all keys of a certain object and includes the name of the key into an array.

For a given expression like this:

{a:1,b:2,c:3}|valuePicker(1)

The output result will be ["a"]

Same for valuePickerMulti, that uses an array with possibles match:

{a:1,b:true,c:'on',d:'nok',e:false,f:0,g:'off',h:'ok'}|valuePickerMulti([true,1,'on','nok'])

The output result will be ["a","b","c","d"]

This is util in scenarios in which you need to write into an attribute activated flag or alarms. I.E:

{
  "alertA":false,
  "alertB":true,
  "alertC":true,
}

Then you can have {"alerts":["alertB","alertC"]}

fgalan commented 1 month ago

CHANGES_NEXT_RELEASE entry should be added.

fgalan commented 1 month ago

Unit test covering the functionality should be added.

mapedraza commented 1 month ago

Unit test covering the functionality should be added.

telefonicaid / iotagent-node-lib