PERF: Load reports async

Changes the AiUsage report to query AiApiRequestStat instead of
AiApiAuditLog for significantly improved query performance.

.discourse-compatibility

@@ -0,0 +1,3 @@
+< 3.6.0.beta1-dev: ca316389b51afeb17a697efaff041e425a0deac6
+< 3.5.0.beta5-dev: cbcbbd2e3316b06c91998c7a0fd493d89ab6d2a5
+< 3.5.0.beta1-dev: b3f205375a2f12287aa3338d8adc1afa98c4bfbb

Gemfile.lock

@@ -1,80 +1,95 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (7.1.3.3)
+    activesupport (8.0.3)
       base64
+      benchmark (>= 0.3)
       bigdecimal
-      concurrent-ruby (~> 1.0, >= 1.0.2)
+      concurrent-ruby (~> 1.0, >= 1.3.1)
       connection_pool (>= 2.2.5)
       drb
       i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
       minitest (>= 5.1)
-      mutex_m
-      tzinfo (~> 2.0)
-    ast (2.4.2)
-    base64 (0.2.0)
-    bigdecimal (3.1.8)
-    concurrent-ruby (1.2.3)
-    connection_pool (2.4.1)
-    drb (2.2.1)
-    i18n (1.14.5)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
+    ast (2.4.3)
+    base64 (0.3.0)
+    benchmark (0.4.1)
+    bigdecimal (3.3.0)
+    concurrent-ruby (1.3.5)
+    connection_pool (2.5.4)
+    drb (2.2.3)
+    i18n (1.14.7)
       concurrent-ruby (~> 1.0)
-    json (2.7.2)
-    language_server-protocol (3.17.0.3)
-    minitest (5.23.1)
-    mutex_m (0.2.0)
-    parallel (1.24.0)
-    parser (3.3.1.0)
+    json (2.15.1)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    logger (1.7.0)
+    minitest (5.26.0)
+    parallel (1.27.0)
+    parser (3.3.9.0)
       ast (~> 2.4.1)
       racc
     prettier_print (1.2.1)
-    racc (1.8.0)
-    rack (3.0.11)
+    prism (1.5.1)
+    racc (1.8.1)
+    rack (3.2.3)
     rainbow (3.1.1)
-    regexp_parser (2.9.2)
-    rexml (3.3.9)
-    rubocop (1.64.0)
+    regexp_parser (2.11.3)
+    rubocop (1.81.1)
       json (~> 2.3)
-      language_server-protocol (>= 3.17.0)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
       parallel (~> 1.10)
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8, < 3.0)
-      rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.31.1, < 2.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.47.1, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.31.3)
-      parser (>= 3.3.1.0)
-    rubocop-capybara (2.20.0)
-      rubocop (~> 1.41)
-    rubocop-discourse (3.8.0)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.47.1)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
+    rubocop-capybara (2.22.1)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-discourse (3.13.3)
       activesupport (>= 6.1)
-      rubocop (>= 1.59.0)
-      rubocop-capybara (>= 2.0.0)
-      rubocop-factory_bot (>= 2.0.0)
-      rubocop-rails (>= 2.25.0)
-      rubocop-rspec (>= 2.25.0)
-    rubocop-factory_bot (2.25.1)
-      rubocop (~> 1.41)
-    rubocop-rails (2.25.0)
+      lint_roller (>= 1.1.0)
+      rubocop (>= 1.73.2)
+      rubocop-capybara (>= 2.22.0)
+      rubocop-factory_bot (>= 2.27.0)
+      rubocop-rails (>= 2.30.3)
+      rubocop-rspec (>= 3.0.1)
+      rubocop-rspec_rails (>= 2.31.0)
+    rubocop-factory_bot (2.27.1)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-rails (2.33.4)
       activesupport (>= 4.2.0)
+      lint_roller (~> 1.1)
       rack (>= 1.1)
-      rubocop (>= 1.33.0, < 2.0)
-      rubocop-ast (>= 1.31.1, < 2.0)
-    rubocop-rspec (2.29.2)
-      rubocop (~> 1.40)
-      rubocop-capybara (~> 2.17)
-      rubocop-factory_bot (~> 2.22)
-      rubocop-rspec_rails (~> 2.28)
-    rubocop-rspec_rails (2.28.3)
-      rubocop (~> 1.40)
+      rubocop (>= 1.75.0, < 2.0)
+      rubocop-ast (>= 1.44.0, < 2.0)
+    rubocop-rspec (3.7.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    rubocop-rspec_rails (2.31.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+      rubocop-rspec (~> 3.5)
     ruby-progressbar (1.13.0)
-    syntax_tree (6.2.0)
+    securerandom (0.4.1)
+    syntax_tree (6.3.0)
       prettier_print (>= 1.2.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    unicode-display_width (2.5.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.1.0)
+    uri (1.0.4)
 
 PLATFORMS
   ruby
@@ -84,4 +99,4 @@ DEPENDENCIES
   syntax_tree
 
 BUNDLED WITH
-   2.5.10
+   2.7.2

app/controllers/discourse_rewind/rewinds_controller.rb

@@ -6,14 +6,35 @@ module ::DiscourseRewind
 
     requires_login
 
-    def show
-      DiscourseRewind::Rewind::Fetch.call(service_params) do
-        on_model_not_found(:year) { raise Discourse::NotFound }
-        on_model_not_found(:user) { raise Discourse::NotFound }
-        on_success do |reports:|
-          @reports = reports
-          render json: MultiJson.dump(reports), status: 200
+    def index
+      DiscourseRewind::FetchReports.call(service_params) do
+        on_model_not_found(:year) do
+          raise Discourse::NotFound.new(nil, custom_message: "discourse_rewind.invalid_year")
         end
+        on_model_not_found(:reports) do
+          raise Discourse::NotFound.new(nil, custom_message: "discourse_rewind.report_failed")
+        end
+        on_success do |reports:, total_available:|
+          render json: { reports: reports, total_available: total_available }, status: :ok
+        end
+      end
+    end
+
+    def show
+      DiscourseRewind::FetchReport.call(service_params) do
+        on_model_not_found(:year) do
+          raise Discourse::NotFound.new(nil, custom_message: "discourse_rewind.invalid_year")
+        end
+        on_model_not_found(:report_class) do
+          raise Discourse::NotFound.new(
+                  nil,
+                  custom_message: "discourse_rewind.invalid_report_index",
+                )
+        end
+        on_model_not_found(:report) do
+          raise Discourse::NotFound.new(nil, custom_message: "discourse_rewind.report_failed")
+        end
+        on_success { |report:| render json: { report: report }, status: :ok }
       end
     end
   end

app/services/discourse_rewind/action/activity_calendar.rb

@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+# For a GitHub like calendar
+# https://docs.github.com/assets/cb-35216/mw-1440/images/help/profile/contributions-graph.webp
+module DiscourseRewind
+  module Action
+    class ActivityCalendar < BaseReport
+      FakeData = {
+        data:
+          (Date.new(2024, 1, 1)..Date.new(2024, 12, 31)).map do |date|
+            { date:, post_count: rand(0..20), visited: false }
+          end,
+        identifier: "activity-calendar",
+      }
+
+      def call
+        return FakeData if Rails.env.development?
+
+        calendar =
+          Post
+            .unscoped
+            .joins(<<~SQL)
+            RIGHT JOIN
+              generate_series('#{date.first}', '#{date.last}', '1 day'::interval) ON
+              posts.created_at::date = generate_series::date AND
+              posts.user_id = #{user.id} AND
+              posts.deleted_at IS NULL
+          SQL
+            .joins(
+              "LEFT JOIN user_visits ON generate_series::date = visited_at AND user_visits.user_id = #{user.id}",
+            )
+            .select(
+              "generate_series::date as date, count(posts.id) as post_count, COUNT(visited_at) > 0 as visited",
+            )
+            .group("generate_series, user_visits.id")
+            .order("generate_series")
+            .map { |row| { date: row.date, post_count: row.post_count, visited: row.visited } }
+
+        { data: calendar, identifier: "activity-calendar" }
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/ai_usage.rb

@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+# AI usage statistics from discourse-ai plugin
+# Shows total usage, favorite features, token consumption, etc.
+# Uses AiApiRequestStat for efficient aggregation queries
+module DiscourseRewind
+  module Action
+    class AiUsage < BaseReport
+      def call
+        return if !enabled?
+
+        base_query = AiApiRequestStat.where(user_id: user.id).where(bucket_date: date)
+
+        # Get aggregated stats in a single query
+        stats =
+          base_query.select(
+            "COALESCE(SUM(usage_count), 0) as total_requests",
+            "COALESCE(SUM(request_tokens), 0) as total_request_tokens",
+            "COALESCE(SUM(response_tokens), 0) as total_response_tokens",
+            "COALESCE(SUM(CASE WHEN response_tokens > 0 THEN usage_count ELSE 0 END), 0) as successful_requests",
+          ).take
+
+        return if stats.total_requests == 0
+
+        total_tokens = stats.total_request_tokens + stats.total_response_tokens
+        success_rate =
+          (
+            if stats.total_requests > 0
+              (stats.successful_requests.to_f / stats.total_requests * 100).round(1)
+            else
+              0
+            end
+          )
+
+        # Most used features (top 5)
+        feature_usage =
+          base_query
+            .group(:feature_name)
+            .order("SUM(usage_count) DESC")
+            .limit(5)
+            .pluck(:feature_name, Arel.sql("SUM(usage_count)"))
+            .to_h
+
+        # Most used AI model (top 5)
+        model_usage =
+          base_query
+            .where.not(language_model: nil)
+            .group(:language_model)
+            .order("SUM(usage_count) DESC")
+            .limit(5)
+            .pluck(:language_model, Arel.sql("SUM(usage_count)"))
+            .to_h
+
+        {
+          data: {
+            total_requests: stats.total_requests,
+            total_tokens: total_tokens,
+            request_tokens: stats.total_request_tokens,
+            response_tokens: stats.total_response_tokens,
+            feature_usage: feature_usage,
+            model_usage: model_usage,
+            success_rate: success_rate,
+          },
+          identifier: "ai-usage",
+        }
+      end
+
+      def enabled?
+        defined?(AiApiRequestStat) && SiteSetting.discourse_ai_enabled
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/assignments.rb

@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+# Assignment statistics using discourse-assign plugin data
+# Shows how many assignments, completed, pending, etc.
+module DiscourseRewind
+  module Action
+    class Assignments < BaseReport
+      def call
+        return if !enabled?
+
+        # Assignments made to the user
+        assignments_scope =
+          Assignment
+            .where(assigned_to_id: user.id, assigned_to_type: "User")
+            .where(created_at: date)
+
+        total_assigned = assignments_scope.count
+
+        # Completed assignments (topics that were assigned and then closed or unassigned)
+        completed_count =
+          assignments_scope
+            .joins(:topic)
+            .where(
+              "topics.closed = true OR assignments.active = false OR assignments.updated_at > assignments.created_at",
+            )
+            .distinct
+            .count
+
+        # Currently pending (still open and assigned)
+        pending_count =
+          Assignment
+            .where(assigned_to_id: user.id, assigned_to_type: "User", active: true)
+            .joins(:topic)
+            .where(topics: { closed: false })
+            .count
+
+        # Assignments made by the user to others
+        assigned_by_user =
+          Assignment
+            .where(assigned_by_user_id: user.id)
+            .where(created_at: date)
+            .count
+
+        {
+          data: {
+            total_assigned: total_assigned,
+            completed: completed_count,
+            pending: pending_count,
+            assigned_by_user: assigned_by_user,
+            completion_rate:
+              total_assigned > 0 ? (completed_count.to_f / total_assigned * 100).round(1) : 0,
+          },
+          identifier: "assignments",
+        }
+      end
+
+      def enabled?
+        defined?(Assignment) && SiteSetting.assign_enabled
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/base_report.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+module DiscourseRewind
+  module Action
+    class BaseReport < Service::ActionBase
+      option :user
+      option :date
+
+      def call
+        raise NotImplementedError
+      end
+
+      def self.enabled?
+        true
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/best_posts.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module DiscourseRewind
+  module Action
+    class BestPosts < BaseReport
+      def call
+        best_posts =
+          Post
+            .where(user_id: user.id)
+            .where(created_at: date)
+            .where(deleted_at: nil)
+            .where("post_number > 1")
+            .order("like_count DESC NULLS LAST, created_at ASC")
+            .limit(3)
+            .select(:post_number, :topic_id, :like_count, :reply_count, :raw, :cooked)
+            .map do |post|
+              {
+                post_number: post.post_number,
+                topic_id: post.topic_id,
+                like_count: post.like_count,
+                reply_count: post.reply_count,
+                excerpt:
+                  post.excerpt(200, { strip_links: true, remap_emoji: true, keep_images: true }),
+              }
+            end
+
+        { data: best_posts, identifier: "best-posts" }
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/best_topics.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module DiscourseRewind
+  module Action
+    class BestTopics < BaseReport
+      def call
+        best_topics =
+          TopTopic
+            .includes(:topic)
+            .references(:topic)
+            .where(topic: { deleted_at: nil, created_at: date, user_id: user.id })
+            .order("yearly_score DESC NULLS LAST")
+            .limit(3)
+            .pluck(:topic_id, :title, :excerpt, :yearly_score)
+            .map do |topic_id, title, excerpt, yearly_score|
+              { topic_id: topic_id, title: title, excerpt: excerpt, yearly_score: yearly_score }
+            end
+
+        { data: best_topics, identifier: "best-topics" }
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/chat_usage.rb

@@ -0,0 +1,82 @@
+# frozen_string_literal: true
+
+# Chat usage statistics
+# Shows message counts, favorite channels, DM activity, etc.
+module DiscourseRewind
+  module Action
+    class ChatUsage < BaseReport
+      def call
+        return if !enabled?
+
+        messages =
+          Chat::Message.where(user_id: user.id).where(created_at: date).where(deleted_at: nil)
+
+        total_messages = messages.count
+        return if total_messages == 0
+
+        # Get favorite channels (public channels)
+        channel_usage =
+          messages
+            .joins(:chat_channel)
+            .where(chat_channels: { type: "CategoryChannel" })
+            .group("chat_channels.id", "chat_channels.name")
+            .count
+            .sort_by { |_, count| -count }
+            .first(5)
+            .map do |(id, name), count|
+              { channel_id: id, channel_name: name, message_count: count }
+            end
+
+        # DM statistics
+        dm_message_count =
+          messages.joins(:chat_channel).where(chat_channels: { type: "DirectMessageChannel" }).count
+
+        # Unique DM conversations
+        unique_dm_channels =
+          messages
+            .joins(:chat_channel)
+            .where(chat_channels: { type: "DirectMessageChannel" })
+            .distinct
+            .count(:chat_channel_id)
+
+        # Messages with reactions received
+        messages_with_reactions =
+          Chat::MessageReaction
+            .joins(:chat_message)
+            .where(chat_messages: { user_id: user.id })
+            .where(chat_messages: { created_at: date })
+            .distinct
+            .count(:chat_message_id)
+
+        # Total reactions received
+        total_reactions_received =
+          Chat::MessageReaction
+            .joins(:chat_message)
+            .where(chat_messages: { user_id: user.id })
+            .where(chat_messages: { created_at: date })
+            .count
+
+        # Average message length
+        avg_message_length =
+          messages.where("LENGTH(message) > 0").average("LENGTH(message)")&.to_f&.round(1) || 0
+
+        {
+          data: {
+            total_messages: total_messages,
+            favorite_channels: channel_usage,
+            dm_message_count: dm_message_count,
+            unique_dm_channels: unique_dm_channels,
+            messages_with_reactions: messages_with_reactions,
+            total_reactions_received: total_reactions_received,
+            avg_message_length: avg_message_length,
+          },
+          identifier: "chat-usage",
+        }
+      end
+
+      def enabled?
+        SiteSetting.chat_enabled
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/favorite_gifs.rb

@@ -0,0 +1,122 @@
+# frozen_string_literal: true
+
+# Find the user's most used GIFs in posts and chat
+# Ranks by usage count and engagement (likes/reactions)
+module DiscourseRewind
+  module Action
+    class FavoriteGifs < BaseReport
+      GIF_URL_PATTERN =
+        %r{
+          https?://[^\s]+\.(?:gif|gifv)
+          |
+          https?://(?!(?:developers|support|blog)\.) (?:[^/\s]+\.)?giphy\.com/(?!dashboard\b)[^\s]+
+          |
+          https?://(?!(?:support)\.) (?:[^/\s]+\.)?tenor\.com/(?!gifapi\b)[^\s]+
+        }ix
+      MAX_RESULTS = 5
+
+      def call
+        gif_data = {}
+
+        # Get GIFs from posts
+        post_gifs = extract_gifs_from_posts
+        post_gifs.each do |url, data|
+          gif_data[url] ||= { url: url, usage_count: 0, likes: 0, reactions: 0 }
+          gif_data[url][:usage_count] += data[:count]
+          gif_data[url][:likes] += data[:likes]
+        end
+
+        # Get GIFs from chat messages if chat is enabled
+        if SiteSetting.chat_enabled
+          chat_gifs = extract_gifs_from_chat
+          chat_gifs.each do |url, data|
+            gif_data[url] ||= { url: url, usage_count: 0, likes: 0, reactions: 0 }
+            gif_data[url][:usage_count] += data[:count]
+            gif_data[url][:reactions] += data[:reactions]
+          end
+        end
+
+        return if gif_data.empty?
+
+        # Sort by engagement score (usage * 10 + likes + reactions)
+        sorted_gifs =
+          gif_data
+            .values
+            .sort_by { |gif| -(gif[:usage_count] * 10 + gif[:likes] + gif[:reactions]) }
+            .first(MAX_RESULTS)
+
+        {
+          data: {
+            favorite_gifs: sorted_gifs,
+            total_gif_usage: gif_data.values.sum { |g| g[:usage_count] },
+          },
+          identifier: "favorite-gifs",
+        }
+      end
+
+      private
+
+      def extract_gifs_from_posts
+        gif_usage = {}
+
+        posts =
+          Post
+            .where(user_id: user.id)
+            .where(created_at: date)
+            .where(deleted_at: nil)
+            .where("raw ~* ?", gif_sql_pattern)
+            .select(:id, :raw, :like_count)
+
+        posts.each do |post|
+          gif_urls = post.raw.scan(GIF_URL_PATTERN).uniq.select { |url| content_gif_url?(url) }
+          gif_urls.each do |url|
+            gif_usage[url] ||= { count: 0, likes: 0 }
+            gif_usage[url][:count] += 1
+            gif_usage[url][:likes] += post.like_count || 0
+          end
+        end
+
+        gif_usage
+      end
+
+      def extract_gifs_from_chat
+        gif_usage = {}
+
+        messages =
+          Chat::Message
+            .where(user_id: user.id)
+            .where(created_at: date)
+            .where(deleted_at: nil)
+            .where("message ~* ?", gif_sql_pattern)
+            .select(:id, :message)
+
+        messages.each do |message|
+          gif_urls =
+            message.message.scan(GIF_URL_PATTERN).uniq.select { |url| content_gif_url?(url) }
+          gif_urls.each do |url|
+            gif_usage[url] ||= { count: 0, reactions: 0 }
+            gif_usage[url][:count] += 1
+
+            # Count reactions on this message
+            reaction_count = Chat::MessageReaction.where(chat_message_id: message.id).count
+            gif_usage[url][:reactions] += reaction_count
+          end
+        end
+
+        gif_usage
+      end
+
+      def gif_sql_pattern
+        @gif_sql_pattern ||= GIF_URL_PATTERN.source.gsub(/\s+/, "")
+      end
+
+      def content_gif_url?(url)
+        return true if url.match?(/\.(gif|gifv)(?:\?|$)/i)
+        return true if url.match?(%r{giphy\.com/(?:gifs?|media|embed|stickers|clips)}i)
+        return true if url.match?(%r{tenor\.com/(?:view|watch|embed|gif)}i)
+
+        false
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/fbff.rb

@@ -0,0 +1,114 @@
+# frozen_string_literal: true
+
+# Forum Best Friend Forever ranking
+# Score is informative only, do not show in UI
+module DiscourseRewind
+  module Action
+    class Fbff < BaseReport
+      MAX_SUMMARY_RESULTS = 50
+      LIKE_SCORE = 1
+      REPLY_SCORE = 10
+
+      def call
+        most_liked_users =
+          like_query(date)
+            .where(acting_user_id: user.id)
+            .group(:user_id)
+            .order("COUNT(*) DESC")
+            .limit(MAX_SUMMARY_RESULTS)
+            .pluck("user_actions.user_id, COUNT(*)")
+            .map { |user_id, count| { user_id => count } }
+            .reduce({}, :merge)
+
+        most_liked_by_users =
+          like_query(date)
+            .where(user: user)
+            .group(:acting_user_id)
+            .order("COUNT(*) DESC")
+            .limit(MAX_SUMMARY_RESULTS)
+            .pluck("acting_user_id, COUNT(*)")
+            .map { |acting_user_id, count| { acting_user_id => count } }
+            .reduce({}, :merge)
+
+        users_who_most_replied_me =
+          post_query(user, date)
+            .where(posts: { user_id: user.id })
+            .group("replies.user_id")
+            .order("COUNT(*) DESC")
+            .limit(MAX_SUMMARY_RESULTS)
+            .pluck("replies.user_id, COUNT(*)")
+            .map { |user_id, count| { user_id => count } }
+            .reduce({}, :merge)
+
+        users_i_most_replied =
+          post_query(user, date)
+            .where("replies.user_id = ?", user.id)
+            .group("posts.user_id")
+            .order("COUNT(*) DESC")
+            .limit(MAX_SUMMARY_RESULTS)
+            .pluck("posts.user_id, COUNT(*)")
+            .map { |user_id, count| { user_id => count } }
+            .reduce({}, :merge)
+
+        #TODO include chat?
+
+        fbffs = [
+          apply_score(most_liked_users, LIKE_SCORE),
+          apply_score(most_liked_by_users, LIKE_SCORE),
+          apply_score(users_who_most_replied_me, REPLY_SCORE),
+          apply_score(users_i_most_replied, REPLY_SCORE),
+        ]
+
+        fbff_id =
+          fbffs
+            .flatten
+            .inject { |h1, h2| h1.merge(h2) { |_, v1, v2| v1 + v2 } }
+            &.sort_by { |_, v| -v }
+            &.first
+            &.first
+
+        return if !fbff_id
+
+        {
+          data: {
+            fbff: BasicUserSerializer.new(User.find(fbff_id), root: false).as_json,
+            yourself: BasicUserSerializer.new(user, root: false).as_json,
+          },
+          identifier: "fbff",
+        }
+      end
+
+      def post_query(user, date)
+        Post
+          .joins(:topic)
+          .includes(:topic)
+          .where(
+            "posts.post_type IN (?)",
+            Topic.visible_post_types(user, include_moderator_actions: false),
+          )
+          .joins(
+            "INNER JOIN posts replies ON posts.topic_id = replies.topic_id AND posts.reply_to_post_number = replies.post_number",
+          )
+          .joins(
+            "INNER JOIN topics ON replies.topic_id = topics.id AND topics.archetype <> 'private_message'",
+          )
+          .joins(
+            "AND replies.post_type IN (#{Topic.visible_post_types(user, include_moderator_actions: false).join(",")})",
+          )
+          .where("replies.created_at BETWEEN ? AND ?", date.first, date.last)
+          .where("replies.user_id <> posts.user_id")
+      end
+
+      def like_query(date)
+        UserAction
+          .joins(:target_topic, :target_post)
+          .where(created_at: date)
+          .where(action_type: UserAction::WAS_LIKED)
+      end
+
+      def apply_score(users, score)
+        users.map { |user_id, count| { user_id => count * score } }
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/invites.rb

@@ -0,0 +1,81 @@
+# frozen_string_literal: true
+
+# Invite statistics
+# Shows how many users this user invited and the impact of those invitees
+module DiscourseRewind
+  module Action
+    class Invites < BaseReport
+      def call
+        # Get all invites created by this user in the date range
+        invites = Invite.where(invited_by_id: user.id).where(created_at: date)
+
+        total_invites = invites.count
+        return if total_invites == 0
+
+        # Redeemed invites (users who actually joined)
+        redeemed_count = invites.where("redemption_count > 0").count
+
+        # Get the users who were invited (via InvitedUser or redeemed invites)
+        invited_user_ids = InvitedUser.where(invite: invites).pluck(:user_id).compact
+
+        invited_users = User.where(id: invited_user_ids)
+
+        # Calculate impact of invitees
+        invitee_post_count =
+          Post.where(user_id: invited_user_ids).where(created_at: date).where(deleted_at: nil).count
+
+        invitee_topic_count =
+          Topic
+            .where(user_id: invited_user_ids)
+            .where(created_at: date)
+            .where(deleted_at: nil)
+            .count
+
+        invitee_like_count =
+          UserAction
+            .where(user_id: invited_user_ids)
+            .where(action_type: UserAction::LIKE)
+            .where(created_at: date)
+            .count
+
+        # Calculate average trust level of invitees
+        avg_trust_level = invited_users.average(:trust_level)&.to_f&.round(1) || 0
+
+        # Most active invitee
+        most_active_invitee = nil
+        if invited_user_ids.any?
+          most_active_id =
+            Post
+              .where(user_id: invited_user_ids)
+              .where(created_at: date)
+              .where(deleted_at: nil)
+              .group(:user_id)
+              .count
+              .max_by { |_, count| count }
+              &.first
+
+          if most_active_id
+            most_active_user = User.find_by(id: most_active_id)
+            most_active_invitee =
+              BasicUserSerializer.new(most_active_user, root: false).as_json if most_active_user
+          end
+        end
+
+        {
+          data: {
+            total_invites: total_invites,
+            redeemed_count: redeemed_count,
+            redemption_rate:
+              total_invites > 0 ? (redeemed_count.to_f / total_invites * 100).round(1) : 0,
+            invitee_post_count: invitee_post_count,
+            invitee_topic_count: invitee_topic_count,
+            invitee_like_count: invitee_like_count,
+            avg_trust_level: avg_trust_level,
+            most_active_invitee: most_active_invitee,
+          },
+          identifier: "invites",
+        }
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/most_viewed_categories.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+# Topics visited grouped by category
+module DiscourseRewind
+  module Action
+    class MostViewedCategories < BaseReport
+      FakeData = {
+        data: [
+          { category_id: 1, name: "cats" },
+          { category_id: 2, name: "dogs" },
+          { category_id: 3, name: "countries" },
+          { category_id: 4, name: "management" },
+        ],
+        identifier: "most-viewed-categories",
+      }
+      def call
+        return FakeData if Rails.env.development?
+
+        most_viewed_categories =
+          TopicViewItem
+            .joins(:topic)
+            .joins("INNER JOIN categories ON categories.id = topics.category_id")
+            .where(user: user)
+            .where(viewed_at: date)
+            .where(categories: { id: user.guardian.allowed_category_ids })
+            .group("categories.id, categories.name")
+            .order("COUNT(*) DESC")
+            .limit(4)
+            .pluck("categories.id, categories.name")
+            .map { |category_id, name| { category_id: category_id, name: name } }
+
+        { data: most_viewed_categories, identifier: "most-viewed-categories" }
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/most_viewed_tags.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+# Topics visited grouped by tag
+module DiscourseRewind
+  module Action
+    class MostViewedTags < BaseReport
+      FakeData = {
+        data: [
+          { tag_id: 1, name: "cats" },
+          { tag_id: 2, name: "dogs" },
+          { tag_id: 3, name: "countries" },
+          { tag_id: 4, name: "management" },
+        ],
+        identifier: "most-viewed-tags",
+      }
+
+      def call
+        return FakeData if Rails.env.development?
+
+        most_viewed_tags =
+          TopicViewItem
+            .joins(:topic)
+            .joins("INNER JOIN topic_tags ON topic_tags.topic_id = topics.id")
+            .joins("INNER JOIN tags ON tags.id = topic_tags.tag_id")
+            .where(user: user)
+            .where(viewed_at: date)
+            .where(tags: { id: Tag.visible(user.guardian).pluck(:id) })
+            .group("tags.id, tags.name")
+            .order("COUNT(DISTINCT topic_views.topic_id) DESC")
+            .limit(4)
+            .pluck("tags.id, tags.name")
+            .map { |tag_id, name| { tag_id: tag_id, name: name } }
+
+        { data: most_viewed_tags, identifier: "most-viewed-tags" }
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/new_user_interactions.rb

@@ -0,0 +1,85 @@
+# frozen_string_literal: true
+
+# Tracks how much this user interacted with new users (created this year)
+# Shows veteran mentorship and community building behavior
+module DiscourseRewind
+  module Action
+    class NewUserInteractions < BaseReport
+      def call
+        year_start = Date.new(date.first.year, 1, 1)
+
+        # Find users who created accounts this year
+        new_user_ids =
+          User
+            .real
+            .where("created_at >= ? AND created_at <= ?", year_start, date.last)
+            .where("id != ?", user.id)
+            .pluck(:id)
+
+        return if new_user_ids.empty?
+
+        # Count likes given to new users
+        likes_scope =
+          UserAction.where(
+            acting_user_id: user.id,
+            user_id: new_user_ids,
+            action_type: UserAction::WAS_LIKED,
+          ).where(created_at: date)
+        likes_given = likes_scope.count
+        liked_user_ids = likes_scope.distinct.pluck(:user_id)
+
+        # Count replies to new users' posts
+        replies_scope =
+          Post
+            .joins(
+              "INNER JOIN posts AS parent_posts ON posts.reply_to_post_number = parent_posts.post_number AND posts.topic_id = parent_posts.topic_id",
+            )
+            .where(posts: { user_id: user.id, deleted_at: nil, created_at: date })
+            .where("parent_posts.user_id": new_user_ids)
+        replies_to_new_users = replies_scope.count
+        replied_user_ids = replies_scope.distinct.pluck("parent_posts.user_id")
+
+        # Count topics created by user that new users participated in
+        topics_with_new_users =
+          Topic
+            .joins(:posts)
+            .where(topics: { user_id: user.id, deleted_at: nil })
+            .where(posts: { user_id: new_user_ids, deleted_at: nil })
+            .where(topics: { created_at: date })
+            .distinct
+            .count
+
+        # Count direct messages/mentions to new users
+        mentions_scope =
+          Post
+            .joins(
+              "INNER JOIN user_actions ON user_actions.target_post_id = posts.id AND user_actions.action_type = #{UserAction::MENTION}",
+            )
+            .where(posts: { user_id: user.id, deleted_at: nil, created_at: date })
+            .where(user_actions: { user_id: new_user_ids })
+        mentions_to_new_users = mentions_scope.distinct.count
+        mentioned_user_ids = mentions_scope.distinct.pluck("user_actions.user_id")
+
+        # Unique new users interacted with
+        unique_new_users = (liked_user_ids + replied_user_ids + mentioned_user_ids).uniq.count
+
+        total_interactions = likes_given + replies_to_new_users + mentions_to_new_users
+
+        return if total_interactions == 0
+
+        {
+          data: {
+            total_interactions: total_interactions,
+            likes_given: likes_given,
+            replies_to_new_users: replies_to_new_users,
+            mentions_to_new_users: mentions_to_new_users,
+            topics_with_new_users: topics_with_new_users,
+            unique_new_users: unique_new_users,
+            new_users_count: new_user_ids.count,
+          },
+          identifier: "new-user-interactions",
+        }
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/reactions.rb

@@ -0,0 +1,92 @@
+# frozen_string_literal: true
+
+# For a most user / received reactions cards
+module DiscourseRewind
+  module Action
+    class Reactions < BaseReport
+      FakeData = {
+        data: {
+          post_received_reactions: {
+            "open_mouth" => 2,
+            "cat" => 32,
+            "dog" => 34,
+            "heart" => 45,
+            "grinning" => 82,
+          },
+          post_used_reactions: {
+            "open_mouth" => 2,
+            "cat" => 32,
+            "dog" => 34,
+            "heart" => 45,
+            "grinning" => 82,
+          },
+          chat_used_reactions: {
+            "open_mouth" => 2,
+            "cat" => 32,
+            "dog" => 34,
+            "heart" => 45,
+            "grinning" => 82,
+          },
+          chat_received_reactions: {
+            "open_mouth" => 2,
+            "cat" => 32,
+            "dog" => 34,
+            "heart" => 45,
+            "grinning" => 82,
+          },
+        },
+        identifier: "reactions",
+      }
+
+      def call
+        return FakeData if Rails.env.development?
+
+        data = {}
+        if defined?(DiscourseReactions::Reaction)
+          # This is missing heart reactions (default like)
+          data[:post_used_reactions] = sort_and_limit(
+            DiscourseReactions::Reaction
+              .by_user(user)
+              .where(created_at: date)
+              .group(:reaction_value)
+              .count,
+          )
+
+          data[:post_received_reactions] = sort_and_limit(
+            DiscourseReactions::Reaction
+              .includes(:post)
+              .where(posts: { user_id: user.id })
+              .where(created_at: date)
+              .group(:reaction_value)
+              .count,
+          )
+        end
+
+        if SiteSetting.chat_enabled
+          data[:chat_used_reactions] = sort_and_limit(
+            Chat::MessageReaction.where(user: user).where(created_at: date).group(:emoji).count,
+          )
+
+          data[:chat_received_reactions] = sort_and_limit(
+            Chat::MessageReaction
+              .includes(:chat_message)
+              .where(chat_message: { user_id: user.id })
+              .where(created_at: date)
+              .group(:emoji)
+              .count,
+          )
+        end
+
+        { data:, identifier: "reactions" }
+      end
+
+      def enabled?
+        SiteSetting.discourse_reactions_enabled || SiteSetting.chat_enabled
+      end
+
+      def sort_and_limit(reactions)
+        reactions.sort_by { |_, v| -v }.first(5).reverse.to_h
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/reading_time.rb

@@ -0,0 +1,202 @@
+# frozen_string_literal: true
+
+# For showcasing the reading time of a user
+# Should we show book covers or just the names?
+module DiscourseRewind
+  module Action
+    class ReadingTime < BaseReport
+      FakeData = {
+        data: {
+          reading_time: 2_880_000,
+          book: "The Combined Cosmere works + Wheel of Time",
+          isbn: "978-0812511819",
+          series: true,
+        },
+        identifier: "reading-time",
+      }
+
+      def call
+        return FakeData if Rails.env.development?
+
+        reading_time = UserVisit.where(user_id: user.id).where(visited_at: date).sum(:time_read)
+        book = best_book_fit(reading_time)
+
+        return if book.nil?
+
+        {
+          data: {
+            reading_time: reading_time,
+            book: book[:title],
+            isbn: book[:isbn],
+            series: book[:series],
+          },
+          identifier: "reading-time",
+        }
+      end
+
+      def popular_books
+        {
+          "The Hunger Games" => {
+            reading_time: 19_740,
+            isbn: "978-0439023481",
+            series: false,
+          },
+          "The Metamorphosis" => {
+            reading_time: 3120,
+            isbn: "978-0553213690",
+            series: false,
+          },
+          "To Kill a Mockingbird" => {
+            reading_time: 22_800,
+            isbn: "978-0061120084",
+            series: false,
+          },
+          "Pride and Prejudice" => {
+            reading_time: 25_200,
+            isbn: "978-1503290563",
+            series: false,
+          },
+          "1984" => {
+            reading_time: 16_800,
+            isbn: "978-0451524935",
+            series: false,
+          },
+          "The Lord of the Rings" => {
+            reading_time: 108_000,
+            isbn: "978-0544003415",
+            series: true,
+          },
+          "Harry Potter and the Sorcerer's Stone" => {
+            reading_time: 24_600,
+            isbn: "978-0590353427",
+            series: true,
+          },
+          "The Great Gatsby" => {
+            reading_time: 12_600,
+            isbn: "978-0743273565",
+            series: false,
+          },
+          "The Little Prince" => {
+            reading_time: 5400,
+            isbn: "978-0156012195",
+            series: false,
+          },
+          "Animal Farm" => {
+            reading_time: 7200,
+            isbn: "978-0451526342",
+            series: false,
+          },
+          "The Catcher in the Rye" => {
+            reading_time: 18_000,
+            isbn: "978-0316769488",
+            series: false,
+          },
+          "Jane Eyre" => {
+            reading_time: 34_200,
+            isbn: "978-0141441146",
+            series: false,
+          },
+          "Fahrenheit 451" => {
+            reading_time: 15_000,
+            isbn: "978-1451673319",
+            series: false,
+          },
+          "The Hobbit" => {
+            reading_time: 27_000,
+            isbn: "978-0547928227",
+            series: false,
+          },
+          "The Da Vinci Code" => {
+            reading_time: 37_800,
+            isbn: "978-0307474278",
+            series: false,
+          },
+          "Little Women" => {
+            reading_time: 30_000,
+            isbn: "978-0147514011",
+            series: false,
+          },
+          "One Hundred Years of Solitude" => {
+            reading_time: 46_800,
+            isbn: "978-0060883287",
+            series: false,
+          },
+          "And Then There Were None" => {
+            reading_time: 16_200,
+            isbn: "978-0062073488",
+            series: false,
+          },
+          "The Alchemist" => {
+            reading_time: 10_800,
+            isbn: "978-0061122415",
+            series: false,
+          },
+          "The Hitchhiker's Guide to the Galaxy" => {
+            reading_time: 12_600,
+            isbn: "978-0345391803",
+            series: false,
+          },
+          "The Complete works of Shakespeare" => {
+            reading_time: 180_000,
+            isbn: "978-1853268953",
+            series: true,
+          },
+          "The Game of Thrones Series" => {
+            reading_time: 360_000,
+            isbn: "978-0007477159",
+            series: true,
+          },
+          "Malazan Book of the Fallen" => {
+            reading_time: 720_000,
+            isbn: "978-0765348821",
+            series: true,
+          },
+          "Terry Pratchett’s Discworld series" => {
+            reading_time: 1_440_000,
+            isbn: "978-9123684458",
+            series: true,
+          },
+          "The Wandering Inn web series" => {
+            reading_time: 2_160_000,
+            isbn: "the-wandering-inn",
+            series: true,
+          },
+          "The Combined Cosmere works + Wheel of Time" => {
+            reading_time: 2_880_000,
+            isbn: "978-0812511819",
+            series: true,
+          },
+          "The Star Trek novels" => {
+            reading_time: 3_600_000,
+            isbn: "978-1852860691",
+            series: true,
+          },
+        }.symbolize_keys
+      end
+
+      def best_book_fit(reading_time)
+        reading_time_rest = reading_time
+        books = []
+
+        while reading_time_rest > 0
+          best_fit = popular_books.min_by { |_, v| (v[:reading_time] - reading_time_rest).abs }
+          break if best_fit.nil?
+
+          books << best_fit.first
+          reading_time_rest -= best_fit.last[:reading_time]
+        end
+
+        return if books.empty?
+
+        book_title =
+          books.group_by { |book| book }.transform_values(&:count).max_by { |_, count| count }.first
+
+        {
+          title: book_title,
+          isbn: popular_books[book_title][:isbn],
+          series: popular_books[book_title][:series],
+        }
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/time_of_day_activity.rb

@@ -0,0 +1,106 @@
+# frozen_string_literal: true
+
+# Time of day activity analysis
+# Shows when a user is most active (considering their timezone)
+# Determines if they are a night owl or early bird
+module DiscourseRewind
+  module Action
+    class TimeOfDayActivity < BaseReport
+      EARLY_BIRD_THRESHOLD = 6..9
+      NIGHT_OWL_THRESHOLD_PM = 22..23
+      NIGHT_OWL_THRESHOLD_AM = 0..2
+
+      def call
+        # Get activity by hour of day (in user's timezone)
+        activity_by_hour = get_activity_by_hour
+
+        return if activity_by_hour.empty?
+
+        total_activities = activity_by_hour.values.sum
+        most_active_hour = activity_by_hour.max_by { |_, count| count }&.first
+        personality = determine_personality(activity_by_hour, total_activities)
+
+        {
+          data: {
+            activity_by_hour: activity_by_hour,
+            most_active_hour: most_active_hour,
+            personality: personality,
+            total_activities: total_activities,
+          },
+          identifier: "time-of-day-activity",
+        }
+      end
+
+      private
+
+      def get_activity_by_hour
+        # Get user timezone offset
+        user_timezone = user.user_option&.timezone || "UTC"
+        quoted_timezone = ActiveRecord::Base.connection.quote(user_timezone)
+        hour_extract_sql =
+          Arel.sql(
+            "EXTRACT(HOUR FROM created_at AT TIME ZONE 'UTC' AT TIME ZONE #{quoted_timezone})::integer",
+          )
+
+        # Initialize hash with all hours
+        activity = (0..23).to_h { |hour| [hour, 0] }
+
+        # Posts created
+        post_hours =
+          Post
+            .where(user_id: user.id)
+            .where(created_at: date)
+            .where(deleted_at: nil)
+            .pluck(hour_extract_sql)
+            .tally
+
+        # User visits (page views)
+        visit_hours =
+          UserHistory
+            .where(acting_user_id: user.id)
+            .where(created_at: date)
+            .where(action: UserHistory.actions[:page_view])
+            .pluck(hour_extract_sql)
+            .tally
+
+        # Chat messages if chat is enabled
+        if SiteSetting.chat_enabled
+          chat_hours =
+            Chat::Message
+              .where(user_id: user.id)
+              .where(created_at: date)
+              .where(deleted_at: nil)
+              .pluck(hour_extract_sql)
+              .tally
+
+          chat_hours.each { |hour, count| activity[hour] += count }
+        end
+
+        post_hours.each { |hour, count| activity[hour] += count }
+        visit_hours.each { |hour, count| activity[hour] += count }
+
+        activity
+      end
+
+      def determine_personality(activity_by_hour, total_activities)
+        return nil if total_activities == 0
+
+        early_bird_activity = EARLY_BIRD_THRESHOLD.sum { |hour| activity_by_hour[hour] || 0 }
+        night_owl_activity =
+          NIGHT_OWL_THRESHOLD_PM.sum { |hour| activity_by_hour[hour] || 0 } +
+            NIGHT_OWL_THRESHOLD_AM.sum { |hour| activity_by_hour[hour] || 0 }
+
+        early_bird_percentage = (early_bird_activity.to_f / total_activities * 100).round(1)
+        night_owl_percentage = (night_owl_activity.to_f / total_activities * 100).round(1)
+
+        if early_bird_percentage > 20
+          { type: "early_bird", percentage: early_bird_percentage }
+        elsif night_owl_percentage > 20
+          { type: "night_owl", percentage: night_owl_percentage }
+        else
+          { type: "balanced", percentage: 0 }
+        end
+      end
+    end
+  end
+end

app/services/discourse_rewind/action/top_words.rb

@@ -1,23 +1,24 @@
 # frozen_string_literal: true
 
 module DiscourseRewind
-  class Rewind::Action::TopWords < Rewind::Action::BaseReport
-    FakeData = {
-      data: [
-        { word: "what", score: 100 },
-        { word: "have", score: 90 },
-        { word: "you", score: 80 },
-        { word: "overachieved", score: 70 },
-        { word: "this", score: 60 },
-        { word: "week", score: 50 },
-      ],
-      identifier: "top-words",
-    }
+  module Action
+    class TopWords < BaseReport
+      FakeData = {
+        data: [
+          { word: "seven", score: 100 },
+          { word: "longest", score: 90 },
+          { word: "you", score: 80 },
+          { word: "overachieved", score: 70 },
+          { word: "assume", score: 60 },
+          { word: "week", score: 50 },
+        ],
+        identifier: "top-words",
+      }
 
-    def call
-      return FakeData if Rails.env.development?
+      def call
+        return FakeData if Rails.env.development?
 
-      words = DB.query(<<~SQL, user_id: user.id, date_start: date.first, date_end: date.last)
+        words = DB.query(<<~SQL, user_id: user.id, date_start: date.first, date_end: date.last)
         WITH popular_words AS (
           SELECT
             *
@@ -78,9 +79,10 @@ module DiscourseRewind
         LIMIT 100
       SQL
 
-      word_score = words.map { { word: _1.original_word, score: _1.ndoc + _1.nentry } }
+        word_score = words.map { { word: _1.original_word, score: _1.ndoc + _1.nentry } }
 
-      { data: word_score, identifier: "top-words" }
+        { data: word_score, identifier: "top-words" }
+      end
     end
   end
 end

app/services/discourse_rewind/fetch_report.rb

@@ -0,0 +1,92 @@
+# frozen_string_literal: true
+
+module DiscourseRewind
+  # Service responsible to fetch a single report by index.
+  #
+  # @example
+  #  ::DiscourseRewind::FetchReport.call(
+  #    guardian: guardian,
+  #    index: 3
+  #  )
+  #
+  class FetchReport
+    include Service::Base
+
+    # @!method self.call(guardian:, params:)
+    #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :index the report index
+    #   @return [Service::Base::Context]
+
+    CACHE_DURATION = Rails.env.development? ? 10.seconds : 5.minutes
+
+    model :year
+    model :date
+    model :report_class
+    model :report
+
+    private
+
+    def fetch_year
+      current_date = Time.zone.now
+      current_month = current_date.month
+      current_year = current_date.year
+
+      case current_month
+      when 1
+        current_year - 1
+      when 12
+        current_year
+      else
+        # Otherwise it's impossible to test in browser unless you're
+        # in December or January
+        if Rails.env.development?
+          current_year
+        else
+          false
+        end
+      end
+    end
+
+    def fetch_date(params:, year:)
+      Date.new(year).all_year
+    end
+
+    def fetch_report_class(date:, guardian:, year:, params:)
+      # Use the same cached all_reports list as FetchReports
+      # If not cached, generate it now
+      key = "rewind:#{guardian.user.username}:#{year}:all_reports"
+      cached_list = Discourse.redis.get(key)
+
+      all_reports =
+        if cached_list
+          MultiJson.load(cached_list, symbolize_keys: true)
+        else
+          # Generate all reports and cache them
+          reports =
+            FetchReports::REPORTS.filter_map do |report_class|
+              begin
+                report_class.call(date:, user: guardian.user, guardian:)
+              rescue => e
+                Rails.logger.error("Failed to generate report #{report_class.name}: #{e.message}")
+                nil
+              end
+            end
+          Discourse.redis.setex(key, CACHE_DURATION, MultiJson.dump(reports))
+          reports
+        end
+
+      # Access index from params data object (params.index) or hash (params[:index])
+      index = (params[:index] || params.index).to_i
+
+      return false if index < 0 || index >= all_reports.length
+
+      all_reports[index]
+    end
+
+    def fetch_report(report_class:)
+      # Report is already generated and cached in the all_reports list
+      report_class
+    end
+  end
+end

app/services/discourse_rewind/fetch_reports.rb

@@ -0,0 +1,112 @@
+# frozen_string_literal: true
+
+module DiscourseRewind
+  # Service responsible to fetch a rewind for a username/year.
+  #
+  # @example
+  #  ::DiscourseRewind::Rewind::Fetch.call(
+  #    guardian: guardian
+  #  )
+  #
+  class FetchReports
+    include Service::Base
+
+    # @!method self.call(guardian:, params:)
+    #   @param [Guardian] guardian
+    #   @param [Hash] params
+    #   @option params [Integer] :year of the rewind
+    #   @option params [Integer] :username of the rewind
+    #   @option params [Integer] :count number of reports to fetch (optional, defaults to 3)
+    #   @return [Service::Base::Context]
+
+    CACHE_DURATION = Rails.env.development? ? 10.seconds : 5.minutes
+    INITIAL_REPORT_COUNT = 3
+
+    # order matters
+    REPORTS = [
+      Action::TopWords,
+      Action::ReadingTime,
+      Action::Reactions,
+      Action::Fbff,
+      Action::MostViewedTags,
+      Action::MostViewedCategories,
+      Action::BestTopics,
+      Action::BestPosts,
+      Action::ActivityCalendar,
+      Action::TimeOfDayActivity,
+      Action::NewUserInteractions,
+      Action::ChatUsage,
+      Action::AiUsage,
+      Action::FavoriteGifs,
+      Action::Assignments,
+      Action::Invites,
+    ]
+
+    model :year
+    model :date
+    model :enabled_reports
+    model :reports
+    model :total_available
+
+    private
+
+    def fetch_year
+      current_date = Time.zone.now
+      current_month = current_date.month
+      current_year = current_date.year
+
+      case current_month
+      when 1
+        current_year - 1
+      when 12
+        current_year
+      else
+        # Otherwise it's impossible to test in browser unless you're
+        # in December or January
+        if Rails.env.development?
+          current_year
+        else
+          false
+        end
+      end
+    end
+
+    def fetch_date(params:, year:)
+      Date.new(year).all_year
+    end
+
+    def fetch_enabled_reports(date:, guardian:, year:)
+      # Generate all reports and filter out nils (disabled/empty reports)
+      # Cache the full list to maintain consistent indices across requests
+      key = "rewind:#{guardian.user.username}:#{year}:all_reports"
+      cached_list = Discourse.redis.get(key)
+
+      return MultiJson.load(cached_list, symbolize_keys: true) if cached_list
+
+      reports =
+        REPORTS.filter_map do |report_class|
+          begin
+            report_class.call(date:, user: guardian.user, guardian:)
+          rescue => e
+            Rails.logger.error("Failed to generate report #{report_class.name}: #{e.message}")
+            nil
+          end
+        end
+
+      # Cache the complete enabled reports list
+      Discourse.redis.setex(key, CACHE_DURATION, MultiJson.dump(reports))
+      reports
+    end
+
+    def fetch_total_available(enabled_reports:)
+      enabled_reports.length
+    end
+
+    def fetch_reports(enabled_reports:, params:)
+      count = params[:count]&.to_i || INITIAL_REPORT_COUNT
+      count = [[count, 1].max, enabled_reports.length].min
+
+      enabled_reports.first(count)
+    end
+  end
+end

app/services/discourse_rewind/rewind/action/activity_calendar.rb

@@ -1,47 +0,0 @@
-# frozen_string_literal: true
-
-# For a GitHub like calendar
-# https://docs.github.com/assets/cb-35216/mw-1440/images/help/profile/contributions-graph.webp
-module DiscourseRewind
-  class Rewind::Action::ActivityCalendar < Rewind::Action::BaseReport
-    FakeData = {
-      data:
-        (Date.new(2024, 1, 1)..Date.new(2024, 12, 31)).map do |date|
-          { date: date.strftime("%Y-%m-%d"), post_count: rand(0..20), visited: false }
-        end,
-      identifier: "activity-calendar",
-    }
-
-    def call
-      return FakeData if Rails.env.development?
-
-      calendar =
-        Post
-          .unscoped
-          .joins(<<~SQL)
-            RIGHT JOIN
-              generate_series('#{date.first}', '#{date.last}', '1 day'::interval) ON
-              posts.created_at::date = generate_series::date AND
-              posts.user_id = #{user.id} AND
-              posts.deleted_at IS NULL
-          SQL
-          .joins(
-            "LEFT JOIN user_visits ON generate_series::date = visited_at AND user_visits.user_id = #{user.id}",
-          )
-          .select(
-            "generate_series::date as date, count(posts.id) as post_count, COUNT(visited_at) > 0 as visited",
-          )
-          .group("generate_series, user_visits.id")
-          .order("generate_series")
-          .map do |row|
-            {
-              date: row.date.strftime("%Y-%m-%d"),
-              post_count: row.post_count,
-              visited: row.visited,
-            }
-          end
-
-      { data: calendar, identifier: "activity-calendar" }
-    end
-  end
-end

app/services/discourse_rewind/rewind/action/base_report.rb

@@ -1,16 +0,0 @@
-# frozen_string_literal: true
-
-module DiscourseRewind
-  class Rewind::Action::BaseReport < Service::ActionBase
-    option :user
-    option :date
-
-    def call
-      raise NotImplementedError
-    end
-
-    def self.enabled?
-      true
-    end
-  end
-end

app/services/discourse_rewind/rewind/action/best_posts.rb

@@ -1,19 +0,0 @@
-# frozen_string_literal: true
-
-module DiscourseRewind
-  class Rewind::Action::BestPosts < Rewind::Action::BaseReport
-    def call
-      best_posts =
-        Post
-          .where(user_id: user.id)
-          .where(created_at: date)
-          .where(deleted_at: nil)
-          .where("post_number > 1")
-          .order("like_count DESC NULLS LAST")
-          .limit(3)
-          .pluck(:post_number, :topic_id, :like_count, :reply_count, :raw, :cooked)
-
-      { data: best_posts, identifier: "best-posts" }
-    end
-  end
-end

app/services/discourse_rewind/rewind/action/best_topics.rb

@@ -1,21 +0,0 @@
-# frozen_string_literal: true
-
-module DiscourseRewind
-  class Rewind::Action::BestTopics < Rewind::Action::BaseReport
-    def call
-      best_topics =
-        TopTopic
-          .includes(:topic)
-          .references(:topic)
-          .where(topic: { deleted_at: nil, created_at: date, user_id: user.id })
-          .order("yearly_score DESC NULLS LAST")
-          .limit(3)
-          .pluck(:topic_id, :title, :excerpt, :yearly_score)
-          .map do |topic_id, title, excerpt, yearly_score|
-            { topic_id: topic_id, title: title, excerpt: excerpt, yearly_score: yearly_score }
-          end
-
-      { data: best_topics, identifier: "best-topics" }
-    end
-  end
-end

app/services/discourse_rewind/rewind/action/favorite_categories.rb

@@ -1,34 +0,0 @@
-# frozen_string_literal: true
-
-# Topics visited grouped by category
-module DiscourseRewind
-  class Rewind::Action::FavoriteCategories < Rewind::Action::BaseReport
-    FakeData = {
-      data: [
-        { category_id: 1, name: "cats" },
-        { category_id: 2, name: "dogs" },
-        { category_id: 3, name: "countries" },
-        { category_id: 4, name: "management" },
-        { category_id: 5, name: "things" },
-      ],
-      identifier: "favorite-categories",
-    }
-    def call
-      return FakeData if Rails.env.development?
-
-      favorite_categories =
-        TopicViewItem
-          .joins(:topic)
-          .joins("INNER JOIN categories ON categories.id = topics.category_id")
-          .where(user: user)
-          .where(viewed_at: date)
-          .group("categories.id, categories.name")
-          .order("COUNT(*) DESC")
-          .limit(5)
-          .pluck("categories.id, categories.name")
-          .map { |category_id, name| { category_id: category_id, name: name } }
-
-      { data: favorite_categories, identifier: "favorite-categories" }
-    end
-  end
-end

app/services/discourse_rewind/rewind/action/favorite_tags.rb

@@ -1,36 +0,0 @@
-# frozen_string_literal: true
-
-# Topics visited grouped by tag
-module DiscourseRewind
-  class Rewind::Action::FavoriteTags < Rewind::Action::BaseReport
-    FakeData = {
-      data: [
-        { tag_id: 1, name: "cats" },
-        { tag_id: 2, name: "dogs" },
-        { tag_id: 3, name: "countries" },
-        { tag_id: 4, name: "management" },
-        { tag_id: 5, name: "things" },
-      ],
-      identifier: "favorite-tags",
-    }
-
-    def call
-      return FakeData if Rails.env.development?
-
-      favorite_tags =
-        TopicViewItem
-          .joins(:topic)
-          .joins("INNER JOIN topic_tags ON topic_tags.topic_id = topics.id")
-          .joins("INNER JOIN tags ON tags.id = topic_tags.tag_id")
-          .where(user: user)
-          .where(viewed_at: date)
-          .group("tags.id, tags.name")
-          .order("COUNT(DISTINCT topic_views.topic_id) DESC")
-          .limit(5)
-          .pluck("tags.id, tags.name")
-          .map { |tag_id, name| { tag_id: tag_id, name: name } }
-
-      { data: favorite_tags, identifier: "favorite-tags" }
-    end
-  end
-end

app/services/discourse_rewind/rewind/action/fbff.rb

@@ -1,112 +0,0 @@
-# frozen_string_literal: true
-
-# Forum Best Friend Forever ranking
-# Score is informative only, do not show in UI
-module DiscourseRewind
-  class Rewind::Action::Fbff < Rewind::Action::BaseReport
-    MAX_SUMMARY_RESULTS ||= 50
-    LIKE_SCORE ||= 1
-    REPLY_SCORE ||= 10
-
-    def call
-      most_liked_users =
-        like_query(date)
-          .where(acting_user_id: user.id)
-          .group(:user_id)
-          .order("COUNT(*) DESC")
-          .limit(MAX_SUMMARY_RESULTS)
-          .pluck("user_actions.user_id, COUNT(*)")
-          .map { |user_id, count| { user_id => count } }
-          .reduce({}, :merge)
-
-      most_liked_by_users =
-        like_query(date)
-          .where(user: user)
-          .group(:acting_user_id)
-          .order("COUNT(*) DESC")
-          .limit(MAX_SUMMARY_RESULTS)
-          .pluck("acting_user_id, COUNT(*)")
-          .map { |acting_user_id, count| { acting_user_id => count } }
-          .reduce({}, :merge)
-
-      users_who_most_replied_me =
-        post_query(user, date)
-          .where(posts: { user_id: user.id })
-          .group("replies.user_id")
-          .order("COUNT(*) DESC")
-          .limit(MAX_SUMMARY_RESULTS)
-          .pluck("replies.user_id, COUNT(*)")
-          .map { |user_id, count| { user_id => count } }
-          .reduce({}, :merge)
-
-      users_i_most_replied =
-        post_query(user, date)
-          .where("replies.user_id = ?", user.id)
-          .group("posts.user_id")
-          .order("COUNT(*) DESC")
-          .limit(MAX_SUMMARY_RESULTS)
-          .pluck("posts.user_id, COUNT(*)")
-          .map { |user_id, count| { user_id => count } }
-          .reduce({}, :merge)
-
-      #TODO include chat?
-
-      fbffs = [
-        apply_score(most_liked_users, LIKE_SCORE),
-        apply_score(most_liked_by_users, LIKE_SCORE),
-        apply_score(users_who_most_replied_me, REPLY_SCORE),
-        apply_score(users_i_most_replied, REPLY_SCORE),
-      ]
-
-      fbff_id =
-        fbffs
-          .flatten
-          .inject { |h1, h2| h1.merge(h2) { |_, v1, v2| v1 + v2 } }
-          &.sort_by { |_, v| -v }
-          &.first
-          &.first
-
-      return if !fbff_id
-
-      {
-        data: {
-          fbff: BasicUserSerializer.new(User.find(fbff_id), root: false).as_json,
-          yourself: BasicUserSerializer.new(user, root: false).as_json,
-        },
-        identifier: "fbff",
-      }
-    end
-
-    def post_query(user, date)
-      Post
-        .joins(:topic)
-        .includes(:topic)
-        .where(
-          "posts.post_type IN (?)",
-          Topic.visible_post_types(user, include_moderator_actions: false),
-        )
-        .joins(
-          "INNER JOIN posts replies ON posts.topic_id = replies.topic_id AND posts.reply_to_post_number = replies.post_number",
-        )
-        .joins(
-          "INNER JOIN topics ON replies.topic_id = topics.id AND topics.archetype <> 'private_message'",
-        )
-        .joins(
-          "AND replies.post_type IN (#{Topic.visible_post_types(user, include_moderator_actions: false).join(",")})",
-        )
-        .where("replies.created_at BETWEEN ? AND ?", date.first, date.last)
-        .where("replies.user_id <> posts.user_id")
-    end
-
-    def like_query(date)
-      UserAction
-        .joins(:target_topic, :target_post)
-        .where(created_at: date)
-        .where(action_type: UserAction::WAS_LIKED)
-    end
-
-    def apply_score(users, score)
-      users.map { |user_id, count| { user_id => count * score } }
-    end
-  end
-end

app/services/discourse_rewind/rewind/action/reactions.rb

@@ -1,90 +0,0 @@
-# frozen_string_literal: true
-
-# For a most user / received reactions cards
-module DiscourseRewind
-  class Rewind::Action::Reactions < Rewind::Action::BaseReport
-    FakeData = {
-      data: {
-        post_received_reactions: {
-          open_mouth: 2,
-          cat: 32,
-          dog: 34,
-          heart: 45,
-          grinning: 82,
-        },
-        post_used_reactions: {
-          open_mouth: 2,
-          cat: 32,
-          dog: 34,
-          heart: 45,
-          grinning: 82,
-        },
-        chat_used_reactions: {
-          open_mouth: 2,
-          cat: 32,
-          dog: 34,
-          heart: 45,
-          grinning: 82,
-        },
-        chat_received_reactions: {
-          open_mouth: 2,
-          cat: 32,
-          dog: 34,
-          heart: 45,
-          grinning: 82,
-        },
-      },
-      identifier: "reactions",
-    }
-
-    def call
-      return FakeData if Rails.env.development?
-
-      data = {}
-      if defined?(DiscourseReactions::Reaction)
-        # This is missing heart reactions (default like)
-        data[:post_used_reactions] = sort_and_limit(
-          DiscourseReactions::Reaction
-            .by_user(user)
-            .where(created_at: date)
-            .group(:reaction_value)
-            .count,
-        )
-
-        data[:post_received_reactions] = sort_and_limit(
-          DiscourseReactions::Reaction
-            .includes(:post)
-            .where(posts: { user_id: user.id })
-            .where(created_at: date)
-            .group(:reaction_value)
-            .count,
-        )
-      end
-
-      if SiteSetting.chat_enabled
-        data[:chat_used_reactions] = sort_and_limit(
-          Chat::MessageReaction.where(user: user).where(created_at: date).group(:emoji).count,
-        )
-
-        data[:chat_received_reactions] = sort_and_limit(
-          Chat::MessageReaction
-            .includes(:chat_message)
-            .where(chat_message: { user_id: user.id })
-            .where(created_at: date)
-            .group(:emoji)
-            .count,
-        )
-      end
-
-      { data:, identifier: "reactions" }
-    end
-
-    def enabled?
-      SiteSetting.discourse_reactions_enabled || SiteSetting.chat_enabled
-    end
-
-    def sort_and_limit(reactions)
-      reactions.sort_by { |_, v| -v }.first(5).reverse.to_h
-    end
-  end
-end