Feature: Add advanced search

• Add frontend functionality

• Minor enhancements/fixes to the existing search service. These have been encountered after a clean setup of the search service of the current branch:

  • Test Configuration is problematic, .testpickle file provided in it is not found. Thus, only the class definition of the current TestConfig is defined.
  • Flask API library is removed, it is incompatible with the latest Werkzeug release.

• Additional problems encountered that are unaddressed:

  • Endpoint /api/search/<index>/fields with HTTP method GET does not work, stacktrace:

    File "/home/alpine/app/opensearch_client.py", line 90, in get_fields_for_index
    fields = fields[index]["mappings"]["properties"]
    KeyError: 'properties'

  • Endpoint /api/search with HTTP method POST does not take into account the type provided in the request body.