File field: field variable to specify a different file content type

[hmoreras]

Parent Issue

#29691

User Story

As a content architect, I want to specify a default content type for all new files via a field variable, so that I can ensure consistency in file handling and streamline content creation.

Acceptance Criteria

• A field variable named defaultContentType should be introduced.
• The defaultContentType variable should allow the content architect to specify a default file content type.
• If the defaultContentType variable is set, all new files created should default to the specified content.
• If the defaultContentType variable is not set, the system should fall back to its current default behavior, dotAsset
  The implementation should be compatible with the new File field functionality.

dotCMS Version

master

Proposed Objective

To enhance the flexibility and usability of the new File field, a defaultContentType variable must be added. This variable will empower content architects to set a consistent default content type for all new files, ensuring predictable behavior and reducing manual effort in specifying content types.

Proposed Priority

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

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Assumptions & Initiation Needs

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Quality Assurance Notes & Workarounds

• Verify that the defaultContentType variable correctly overrides the default behavior for new files when set.
• Validate that the system reverts to the current default content type when the variable is not set.
• Ensure compatibility with all existing functionalities related to file management in dotCMS.