Add graphs and retention metrics to admin dashboard (#16829)
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		@@ -1,49 +1,17 @@
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# frozen_string_literal: true
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require 'sidekiq/api'
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module Admin
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  class DashboardController < BaseController
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    def index
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      @system_checks         = Admin::SystemCheck.perform
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      @users_count           = User.count
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      @time_period           = (1.month.ago.to_date...Time.now.utc.to_date)
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      @pending_users_count   = User.pending.count
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      @registrations_week    = Redis.current.get("activity:accounts:local:#{current_week}") || 0
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      @logins_week           = Redis.current.pfcount("activity:logins:#{current_week}")
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      @interactions_week     = Redis.current.get("activity:interactions:#{current_week}") || 0
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      @relay_enabled         = Relay.enabled.exists?
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      @single_user_mode      = Rails.configuration.x.single_user_mode
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      @registrations_enabled = Setting.registrations_mode != 'none'
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      @deletions_enabled     = Setting.open_deletion
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      @invites_enabled       = Setting.min_invite_role == 'user'
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      @search_enabled        = Chewy.enabled?
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      @version               = Mastodon::Version.to_s
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      @database_version      = ActiveRecord::Base.connection.execute('SELECT VERSION()').first['version'].match(/\A(?:PostgreSQL |)([^\s]+).*\z/)[1]
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      @redis_version         = redis_info['redis_version']
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      @reports_count         = Report.unresolved.count
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      @queue_backlog         = Sidekiq::Stats.new.enqueued
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      @recent_users          = User.confirmed.recent.includes(:account).limit(8)
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      @database_size         = ActiveRecord::Base.connection.execute('SELECT pg_database_size(current_database())').first['pg_database_size']
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      @redis_size            = redis_info['used_memory']
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      @ldap_enabled          = ENV['LDAP_ENABLED'] == 'true'
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      @cas_enabled           = ENV['CAS_ENABLED'] == 'true'
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      @saml_enabled          = ENV['SAML_ENABLED'] == 'true'
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      @pam_enabled           = ENV['PAM_ENABLED'] == 'true'
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      @hidden_service        = ENV['ALLOW_ACCESS_TO_HIDDEN_SERVICE'] == 'true'
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      @trending_hashtags     = TrendingTags.get(10, filtered: false)
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      @pending_reports_count = Report.unresolved.count
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      @pending_tags_count    = Tag.pending_review.count
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      @authorized_fetch      = authorized_fetch_mode?
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      @whitelist_enabled     = whitelist_mode?
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      @profile_directory     = Setting.profile_directory
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      @timeline_preview      = Setting.timeline_preview
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      @trends_enabled        = Setting.trends
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    end
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    private
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    def current_week
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      @current_week ||= Time.now.utc.to_date.cweek
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    end
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    def redis_info
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      @redis_info ||= begin
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        if Redis.current.is_a?(Redis::Namespace)
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