[Multi-language] : Create endpoints to feed the Multi-language Component for the Edit Contentlet sidebar

[jcastro-dotcms]

Parent Issue

• Spike: API Investigation for Multi-language Content Support #30581

User Story

As a dotCMS User, I want to view locale-related information of the Contentlet that I'm creating or editing.

Acceptance Criteria

Expose the required data via REST:

• An Endpoint that takes a Contentlet Identifier which returns ALL languages in the dotCMS repo. For each of them, a new attribute will indicate whether the Contentlet is available in such a language or not.
• An Endpoint that returns the currently selected default Language.
• The data structure will be the same one used by the soon-to-be-deprecated method in the PageResource class. For instance:

{
    "entity": [
        {
            "country": "United States",
            "countryCode": "US",
            "id": 1,
            "isoCode": "en-us",
            "language": "English",
            "languageCode": "en",
            "translated": true
        },
        {
            "country": "Espana",
            "countryCode": "ES",
            "id": 2,
            "isoCode": "es-es",
            "language": "Espanol",
            "languageCode": "es",
            "translated": false
        }
    ],
    "errors": [],
    "i18nMessagesMap": {},
    "messages": [],
    "pagination": null,
    "permissions": []
}

Proposed Objective

Core Features

Proposed Priority

Priority 2 - Important

External Links... Slack Conversations, Support Tickets, Figma Designs, etc.

https://dotcms.slack.com/archives/C058GCQ7T39/p1730827058966279

Assumptions & Initiation Needs

No response

Quality Assurance Notes & Workarounds

No response

Sub-Tasks & Estimates

• Implement the missing features as described in my comment in the spike ticket: Spike: API Investigation for Multi-language Content Support #30581 (comment)
• Add the respective Postman tests.

[github-actions]

PRs:

• feat(multi-language) #30591 : Create endpoints to feed the Multi-language Component for the Edit Contentlet sidebar #30606

[oidacra]

Endpoint to get the langs
/api/v1/content//{identifier}/languages
Endpoint to get the default language:
/api/v2/languages/_getdefault

[hmoreras]

Pass internal QA:

Languages of specific content: http://localhost:8080/api/v1/content/a41e5207ac4f373fccd68325603ec526/languages

Default language: http://localhost:8080/api/v2/languages/_getdefault

[josemejias11]

Approved: Tested on trunk_786c18d, Docker, macOS 14.5, FF v126.0.1