Class: RailsErrorDashboard::Queries::DashboardStats

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_error_dashboard/queries/dashboard_stats.rb

Overview

Query: Fetch dashboard statistics This is a read operation that aggregates error data for the dashboard

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(application_id: nil) ⇒ DashboardStats

Returns a new instance of DashboardStats.



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# File 'lib/rails_error_dashboard/queries/dashboard_stats.rb', line 8

def initialize(application_id: nil)
  @application_id = application_id
end

Class Method Details

.call(application_id: nil) ⇒ Object 



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# File 'lib/rails_error_dashboard/queries/dashboard_stats.rb', line 12

def self.call(application_id: nil)
  new(application_id: application_id).call
end

Instance Method Details

#cache_key ⇒ Object 



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# File 'lib/rails_error_dashboard/queries/dashboard_stats.rb', line 76

def cache_key
  # Cache key includes last error update timestamp for auto-invalidation
  # Also includes current hour to ensure fresh data
  # Uses base_scope to respect application_id filter for proper cache isolation
  [
    "dashboard_stats",
    @application_id || "all",
    base_scope.maximum(:updated_at)&.to_i || 0,
    Time.current.hour
  ].join("/")
end

#call ⇒ Object 



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# File 'lib/rails_error_dashboard/queries/dashboard_stats.rb', line 16

def call
  # Cache dashboard stats for 1 minute to reduce database load
  # Dashboard is viewed frequently, so short cache prevents stale data
  begin
    Rails.cache.fetch(cache_key, expires_in: 1.minute) do
      {
        total_today: base_scope.where("occurred_at >= ?", Time.current.beginning_of_day).count,
        total_week: base_scope.where("occurred_at >= ?", 7.days.ago).count,
        total_month: base_scope.where("occurred_at >= ?", 30.days.ago).count,
        unresolved: base_scope.unresolved.count,
        resolved: base_scope.resolved.count,
        by_platform: base_scope.group(:platform).count,
        top_errors: top_errors,
        #  Trend visualizations
        errors_trend_7d: errors_trend_7d,
        errors_by_severity_7d: errors_by_severity_7d,
        spike_detected: spike_detected?,
        spike_info: spike_info,
        # New metrics for Overview dashboard
        error_rate: error_rate,
        affected_users_today: affected_users_today,
        affected_users_yesterday: affected_users_yesterday,
        affected_users_change: affected_users_change,
        trend_percentage: trend_percentage,
        trend_direction: trend_direction,
        top_errors_by_impact: top_errors_by_impact,
        average_resolution_time: average_resolution_time
      }
    end
  rescue => e
    # If Rails.cache or any stats query fails, return empty stats hash
    # This prevents broadcast failures in API-only mode or when cache is unavailable
    RailsErrorDashboard::Logger.error("[RailsErrorDashboard] DashboardStats failed: #{e.class} - #{e.message}")
    RailsErrorDashboard::Logger.debug("[RailsErrorDashboard] Backtrace: #{e.backtrace&.first(3)&.join("\n")}")

    # Return minimal stats hash to prevent nil errors in views
    {
      total_today: 0,
      total_week: 0,
      total_month: 0,
      unresolved: 0,
      resolved: 0,
      by_platform: {},
      top_errors: {},
      errors_trend_7d: {},
      errors_by_severity_7d: { critical: 0, high: 0, medium: 0, low: 0 },
      spike_detected: false,
      spike_info: nil,
      error_rate: 0.0,
      affected_users_today: 0,
      affected_users_yesterday: 0,
      affected_users_change: 0,
      trend_percentage: 0.0,
      trend_direction: :stable,
      top_errors_by_impact: [],
      average_resolution_time: nil
    }
  end
end