Support availableLanguages key

[mportiz08]

Bug/issue #, if applicable: 149303906

Summary

The availableLocales Render JSON key may be renamed to availableLanguages going forward, although we still want to support both keys for maximum compatibility with older JSON (preferring the new one if both are present for some reason).

Testing

Steps:

1. Verify that the key availableLanguages can be used in place of availableLocales

Checklist

Make sure you check off the following items. If they cannot be completed, provide a reason.

• Added tests
• Ran npm test, and it succeeded
• Updated documentation if necessary

[marinaaisa]

Hi Marcus!

I left some refactoring ideas and suggestions, everything else looks great, thank you!

[marinaaisa]

We could refactor this code by adding a computed property:

availableLanguages: ({ metadata: { availableLanguages, availableLocales } = {} }) => (
  availableLanguages ?? availableLocales
),

and then just watch that computed property like:

watch: {
  availableLanguages(newValue) {
    AppStore.setAvailableLocales(newValue);
  },
},

instead of watching 'metadata.availableLocales' and 'metadata.availableLanguages'

[mportiz08]

I agree that the existing logic could be refactored and improved to be better and more consistent, but I was mostly focused on making the minimal changes to minimize the surface area of changes overall.

Thanks for the suggestion! It might be good to make those changes afterwards.

[marinaaisa]

Same feedback about the computed property as before

[marinaaisa]

Same feedback about the computed property as before

[marinaaisa]

Similar feedback:

We could make a computed property like

resolvedAvailableLanguages({ availableLanguages, availableLocales }) {
  return availableLanguages ?? availableLocales;
}

and then have a watcher like

watch: {
  resolvedAvailableLanguages(newValue) {
    AppStore.setAvailableLocales(newValue);
  },
},

on created(), we could also simplify it by:

AppStore.setAvailableLocales(this.resolvedAvailableLanguages);

[marinaaisa]

Approving it since it works well!

[mportiz08]

@swift-ci test