Content Manager refactor I

[f-galland]

Description

We are facing some problems to continue the development of the Content Manager due to some missing pieces of code and missing features, such as the initialization of the snapshot link into the wazuh-context index.

Functional requirements

• The Content Manager initializes the wazuh-context index on start.
  • The snapshot value is set to a valid link.
  • The offset value is set to 0.
  • The last_offset value is set to the offset value returned by the request to the CTI API.

Implementation restrictions

• The wazuh-context index is initialized with the content returned by the CTI API, by performing an HTTP request.

Plan

• Rename ContextConsumerCatalog to ConsumerInfo
• Get the consumer info from the CTI API and index the data at onNodeStarted()
• Remove all test-related code (endpoints). Move the logic inside the plugin or unit tests
• Rename CTIclient::getConsumerInfo() to ConsumerInfo (a model representing the response from API Documentation)
• Simplify methods in the ContentIndex class. Keep only the method ContextIndex::set(consumerInfo: ConsumerInfo): FutureComplete, which:
  • Writes consumerInfo into the index.
  • Stores the fields: context, name, last_offset, and last_snapshot_link
• Reduce the model to only the fields that will be used; the rest can be ignored for now
• Review, simplify, and unify the models
  • Remove Document, GenericDocument, Offset, Offsets / Unify them into a new model ContextChanges

Sample document:

[
  {
    "_index": "wazuh-context",
    "_id": "foo",
    "_source": {
      "bar": {
        "offset": 0,
        "last_offset": 44,
        "snapshot": "uri-to-snapshot"
      }
    }
  }
]