[Remove discover] Refactor AngularJS overview controller

[yenienserrano]

Description

To deprecate angularJS in the plugins we need to refactor the overview controller into a ReactJS component.
The files are located in:

• /plugins/main/public/controllers/overview/overview.js

[yenienserrano]

I am looking at how to replace the configurations needed for the different models.

[jbiset]

RESEARCH - Update 29/04/2024

RESEARCH MANAGEMENT OF PERSISTENCE OF STATES

• OSD documentation:
  • docs/plugins/data_persistence.md
  • src/plugins/opensearch_dashboards_utils/docs/global_data_persistence.md
  • src/plugins/opensearch_dashboards_utils/docs/state_sync/README.md
• Using OsdUrlStateStorage in Wazuh: plugins/main/public/kibana-integrations/discover/application/angular/discover_state.ts

REVIEW OVERVIEW CONTROLLER

Relative path: plugins/main/public/controllers/overview/overview.js
Class: OverviewController
Methods:

• $onInit (Initializes module descriptions through the WAZUH_MODULES constant. Remove the _a parameter from the URL. Initializes the filterHandler so that it can be used later to update visualizations. Defines the getMainProps and getVisualizeProps methods in $scope. Subscribe the destroy event to clear the displays. Finally, if there is an agent selected, it compares it with the one listed in the application state and updates the URL if they do not match.)
• inArray (This method is not used. It must be removed. In plugins/main/public/controllers/agent/agents.js the same method is also defined but they are defined in the $scope)
• updateSelectedAgents (Updates if an agent is selected for views. Also updates the value of agentId in the URL)
• switchSubtab (Updates the properties of the overview section, updates the tabView of the URL, and emits the changeTabView message that kibana-discover listens for with the tabListener)
• calculateWodleTagFromTab (This method is not used. It must be removed)
• switchTab (Updates the properties of visualizations and agent selection, updates refreshInterval of common-data, and updates the tabView via switchSubtab)
• startVis2Png (Used to transform a visualization into an image. Use the reportingService that comes as a parameter)
• getSummary (Gets the summary of the agents. Replaced to get the agent summary locally in the Overview component)
• loadConfiguration (Set the wzMonitoringEnabled setting to Overview with wazuh.monitoring.enabled)
• addMitrefilter (Adds Filter by Mitre.ID. This will be replaced with the new DataSource)
• init (Load the configuration from the overview section via loadConfiguration, update the current tab in the URL via switchTab and in the application state via updateCurrentTab with Redux. It also subscribes to the sendVisDataRows event to update attacksCount in the $scope, although attacksCount is no longer used, so this subscription can be removed.)

Overview diagram

[jbiset]

Update 02/05/2024

The problem is analyzed when an agent is pinned to the different modules that render Overview and the following is detected:
The state of a pinned agent has 3 sources of truth: URL, FilterManager and AppStateReducer (Redux). Since in different places not all sources of truth are taken into account to manage the pinned agent, inconsistencies occur that lead to erratic behavior.

TO DO:

Analyze the different components that interact with the state of a pinned agent and bring them to use a single source of truth, probably the PatternDataSourceFilterManager.