Issue #947 Add tokens for Original File filename, extension.

[alxp]

GitHub Issue: Add tokens to get Original File filename

What does this Pull Request do?

Adds tokens to get info about the original uploaded file to help with derivative file names.

What's new?

Adds three new tokens

• media-original-file:basename
• media-original-file:filename
• media-original-file:extension

• Does this change add any new dependencies? No
• Does this change require any other modifications to be made to the repository
  (i.e. Regeneration activity, etc.)? No
• Could this change impact execution of existing code? No

How should this be tested?

1. Go to the Actions page and edit an existing Derivative action
2. in the field for file name path and name, add one of the new tokens
3. Upload a new media that will trigger the derivative you edited
4. The new name should have the token you added in it.

Documentation Status

• Does this change existing behaviour that's currently documented? No
• Does this change require new pages or sections of documentation?
• Who does this need to be documented for? N/A - Tokens are self-documenting

Interested parties

Tag (@ mention) interested parties or, if unsure, @Islandora/committers

[wgilling]

It works as needed. The first time I tried this, I did not use the islandoratokens prefix to the token. After updating my token value and running my system action again, the resulting service file was named accordingly.