Initiate Line Entity Class

[cubap]

A module for a "Line" is needed for use by the other services. In TPEN, a Line is a single Annotation with an id that is referenced in an Annotation Page items array. This Annotation Page is a single Page in an Layer (Annotation Collection). The module should support the methods needed for the api services.

A snip from the relevant document includes:

Single TPEN annotation as a “line” contains Canvas fragment and transcription content

• Consider membership reference to parent Annotation Page
• Consider previous and next lines
• Parameterize
  • Only text content as string
  • Only Image link as URL
  • Get parent/sibling/project
  • Embed referenced documents
  • Metadata only
  • HTML document

The module should be created and importable, but all the methods can just stub out. Tests come first and can simply expect that methodName typeof === "function".

The clip above is a GET but there is also update and delete things to include.

[cubap]

use the attached branch 48-initiate-line-entity-class to add failing tests and start building.