Admin reports with accounts (#2092)

* Add a ReportFilter class

* Add reports and targeted_reports relationships to Account

* Use ReportFilter from admin/reports controller

* Link to admin/reports filtered views from admin account show view

* Add indexes to reports.account_id and reports.target_account_id

app/models/account.rb

@@ -55,6 +55,10 @@ class Account < ApplicationRecord
   # PuSH subscriptions
   has_many :subscriptions, dependent: :destroy
 
+  # Report relationships
+  has_many :reports
+  has_many :targeted_reports, class_name: 'Report', foreign_key: :target_account_id
+
   scope :remote, -> { where.not(domain: nil) }
   scope :local, -> { where(domain: nil) }
   scope :without_followers, -> { where('(select count(f.id) from follows as f where f.target_account_id = accounts.id) = 0') }

app/models/report_filter.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class ReportFilter
+  attr_reader :params
+
+  def initialize(params)
+    @params = params
+  end
+
+  def results
+    scope = Report.unresolved
+    params.each do |key, value|
+      scope = scope.merge scope_for(key, value)
+    end
+    scope
+  end
+
+  def scope_for(key, value)
+    case key.to_sym
+    when :resolved
+      Report.resolved
+    when :account_id
+      Report.where(account_id: value)
+    when :target_account_id
+      Report.where(target_account_id: value)
+    else
+      raise "Unknown filter: #{key}"
+    end
+  end
+end