Error and warning indicators for filters in FilterBar

[lizozom]

Following an SDH issue, I started adding an error indicator to FilterBar to appear when a filter uses a missing IndexPattern.

This new ability, uncovered an underlying issue that I want to discuss here.

SearchBar Index Patterns

At the moment, we're giving TopNavMenu a list of IndexPatterns. This list is a subset of all index patterns. We use this list, rather than the full index pattern list, to:

• Restrict autocomplete in QueryInputString component, to fetch relevant suggestions
• Check the existence of a filter's index pattern and fields.
• Show the Index Patterns drop down in FilterEditor in case of any errors.

Saved Queries

When you load a SavedQuery it may apply filters that reference an index pattern that is not passed into the filter bar. Therefore they now appear as errors.

I think we need to save the "Error" indication for deleted index patterns or fields, and filters such as the one in the image above need to have a clear warning.

So the logic would be:

• If the filter's index pattern is in the list passed in by the application - It's OK
• If the filter's index pattern is not in the list passed in by the application, but it does exist in kibana - Show a warning
• If the filter's index pattern does not exist in kibana - show an error.

[elasticmachine]

Pinging @elastic/kibana-app-arch (Team:AppArch)