na

3 weeks ago · ace37a23d2
--- a/AGENTS.md
+++ b/AGENTS.md
@ -13,6 +13,8 @@ This project is a Ruby on Rails application developed for the IKEA Foundation. I
  - **Stage result:** Shows the outcome node and applies its score.
  - **Last save / Results:** Final compost-vs-landfill choice, then the scored results screen.
 - **Scoring:** Answer scores live in `config/question_scores.json`, not in the database. See below.
 - **Analytics:** An admin dashboard at `/admin/:locale/analytics` reporting funnel drop-off,
  answer distribution and the results-screen thumbs vote. See below.
 - **Admin Interface:** A backend for managing nodes, assets (Active Storage), users, and translations.
 - **Search:** `pg_search` integration for content discovery.
@ -32,7 +34,9 @@ This project is a Ruby on Rails application developed for the IKEA Foundation. I
  - **Level 2 (answers under a stage):** `good_answer`, `bad_answer`, `chance`
  - **Level 3 (outcomes under a chance):** `good_answer`, `bad_answer`
 - `Player`: Tracks session state, `progress` (per-stage `answer_id` / `result_id`), the
  cumulative `score`, and the `scores` hash keyed by `food_waste`, `emissions`, `income`.
  cumulative `score`, the `scores` hash keyed by `food_waste`, `emissions`, `income`,
  the furthest screen reached (`furthest_step`) and the results-screen thumbs vote
  (`rating` / `rated_at`).
 - `Asset` & `Attachment`: Handles media and its contextual content (body text, styling) associated with nodes.
 - `User`: Admin authentication and roles.
@ -78,12 +82,41 @@ because nothing raises: `neutral` was a verbatim copy of `positive` in every loc
 `income: 0` player was told they "earned some money". When touching these, sweep all locales
 and check the three strings actually differ, not just that the key exists.
 ## Analytics
 There is no event log. `GameAnalytics` derives everything from two columns on `players`:
 - `progress` — what people *did* (the answer node they landed on for each stage).
 - `furthest_step` — where people *stopped*. Written by `GameController#track_step`, an
  `after_action` on the screen actions. `Player#record_step` only ever moves a player
  forward, so the browser back button can't rewind the funnel.
 Step names are `facts`, `intro`, `stage_<n>`, `stage_<n>_result`, `last_save`, `done`,
 `results`, ordered by `Player.step_rank`.
 **Gotcha:** stage reach is computed from `progress`, *not* by comparing `furthest_step`
 ranks. The last-save early exit jumps a player straight to the end of the game, so a rank
 comparison would credit them with stages they never saw. The last-save branch is therefore
 reported as its own panel rather than as a funnel step.
 **Gotcha:** `DemoActivity` (see `app/services/demo_activity.rb`) invents players with no
 gameplay to feed the leaderboard banner, which inflates every count and shows up as a huge
 drop before "Facts". The dashboard warns about this while `DemoActivity::ENABLED` is true.
 ### Thumbs up / down
 `Player#rate!` stores `rating` as `1` / `-1` (`Player::RATINGS`), one per player — voting
 again overwrites. The results screen posts to `game#rate` via `rating_controller.js`, which
 flips the button state immediately and does not await the response.
 ## Project Structure
 - `app/controllers/admin/`: Admin backend logic.
 - `app/controllers/game_controller.rb`: Main game loop (stage -> answer -> result -> results).
 - `app/controllers/api/`: JSON endpoints (see `docs/leaderboard_api.md`).
 - `app/helpers/game_helper.rb`: Result bands and per-impact tone thresholds.
 - `app/services/game_analytics.rb`: Aggregates the admin analytics dashboard.
 - `app/controllers/admin/analytics_controller.rb`: Admin analytics dashboard.
 - `app/models/concerns/`: Shared logic for ancestry, attachments, and tags.
 - `config/locales/`: YAML translation files.
 - `config/question_scores.json`: Answer scoring table.
--- a/app/assets/stylesheets/analytics.css
+++ b/app/assets/stylesheets/analytics.css
@ -0,0 +1,270 @@
 .analytics {
  --analytics-positive: #1a863a;
  --analytics-negative: #b24226;
  --analytics-neutral: #c08a1e;
  max-width: 1100px;
  padding-bottom: 4rem;
 }
 /* ----------------------------------------------------------- period picker */
 .analytics-periods {
  display: flex;
  gap: 0.25rem;
  align-items: center;
 }
 .analytics-period {
  padding: 0.35em 0.8em;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--secondary);
  text-decoration: none;
  font-size: 0.85rem;
  white-space: nowrap;
  &:hover {
    background: var(--hover);
  }
  &.current {
    background: var(--clr-black);
    border-color: var(--clr-black);
    color: #fff;
  }
 }
 .analytics-warning {
  border: 1px solid #e0c060;
  background: #fdf6e3;
  border-radius: 8px;
  padding: 0.8rem 1rem;
  margin: 1.5rem 0 0;
  font-size: 0.85rem;
  line-height: 1.5;
  max-width: 70ch;
  & code {
    font-family: var(--font-mono);
    font-size: 0.8em;
  }
 }
 /* ------------------------------------------------------------------- cards */
 .analytics-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
 }
 .analytics-card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.2rem;
  background: #fff;
  &.positive .analytics-card-value { color: var(--analytics-positive); }
  &.negative .analytics-card-value { color: var(--analytics-negative); }
 }
 .analytics-card-value {
  font-size: 2rem;
  line-height: 1.1;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
 }
 .analytics-card-label {
  margin-top: 0.35rem;
  color: var(--secondary);
  font-size: 0.85rem;
 }
 .analytics-card-sub {
  margin-top: 0.2rem;
  color: var(--clr-grey-400);
  font-size: 0.78rem;
 }
 /* ------------------------------------------------------------------ panels */
 .analytics-panel {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  margin-top: 2.5rem;
  & > h2 {
    font-size: 1.1rem;
    font-weight: 500;
    margin: 0 0 0.25rem;
    & small {
      color: var(--clr-grey-400);
      font-weight: 400;
      font-size: 0.8rem;
      margin-left: 0.5rem;
    }
  }
  & .analytics-cards {
    margin-top: 1rem;
  }
 }
 .analytics-note,
 .analytics-empty {
  color: var(--secondary);
  font-size: 0.85rem;
  margin: 0.25rem 0 0;
  max-width: 60ch;
 }
 .analytics-empty {
  padding: 1rem 0;
  font-style: italic;
 }
 .analytics-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 0 2.5rem;
 }
 /* -------------------------------------------------------------------- bars */
 .analytics-bars {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
 }
 /* Narrow two-column breakdowns have no delta column, and the label and value
   columns have to shrink or the track collapses to nothing. */
 .analytics-bars--compact .analytics-bar-row {
  grid-template-columns: minmax(80px, 12rem) 1fr 6.5rem;
  gap: 0.6rem;
 }
 .analytics-bar-row {
  display: grid;
  grid-template-columns: minmax(140px, 22rem) 1fr 8.5rem 6rem;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.85rem;
  padding: 0.25rem 0;
  &.is-outcome {
    font-size: 0.8rem;
    opacity: 0.8;
    & .analytics-bar-label {
      padding-left: 1rem;
    }
  }
 }
 .analytics-bar-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  & em {
    color: var(--clr-grey-400);
    font-style: normal;
    font-size: 0.72rem;
    margin-left: 0.4rem;
  }
 }
 .analytics-bar-track {
  background: var(--clr-grey-200);
  border-radius: 3px;
  height: 12px;
  overflow: hidden;
 }
 .analytics-bar-fill {
  height: 100%;
  background: var(--action);
  border-radius: 3px;
  transition: width 0.2s ease;
  &.positive { background: var(--analytics-positive); }
  &.negative { background: var(--analytics-negative); }
  &.neutral  { background: var(--analytics-neutral); }
 }
 .analytics-bar-value {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  & span {
    color: var(--secondary);
    margin-left: 0.4rem;
    font-size: 0.78rem;
  }
 }
 .analytics-bar-delta {
  font-variant-numeric: tabular-nums;
  font-size: 0.78rem;
  text-align: right;
  & .negative { color: var(--analytics-negative); }
 }
 /* ------------------------------------------------------------ split & stage */
 .analytics-split {
  display: flex;
  height: 14px;
  border-radius: 3px;
  overflow: hidden;
  margin-top: 1.25rem;
  background: var(--clr-grey-200);
 }
 .analytics-split-part {
  &.positive { background: var(--analytics-positive); }
  &.negative { background: var(--analytics-negative); }
 }
 .analytics-stage {
  margin-top: 2rem;
  & > h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    margin: 0;
    & small {
      color: var(--clr-grey-400);
      font-weight: 400;
      font-size: 0.78rem;
    }
  }
 }
 .analytics-stage-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--clr-grey-200);
  font-size: 0.75rem;
 }
--- a/app/assets/stylesheets/application.css
+++ b/app/assets/stylesheets/application.css
@ -919,6 +919,14 @@ dialog::backdrop {
        rotate: 180deg;
      }
    }
    &.is-selected {
      background-color: var(--clr-black);
      & svg {
        fill: #fff;
      }
    }
  }
 }
--- a/app/controllers/admin/analytics_controller.rb
+++ b/app/controllers/admin/analytics_controller.rb
@ -0,0 +1,17 @@
 class Admin::AnalyticsController < Admin::AdminController
  helper_method :period
  # GET /admin/:locale/analytics
  def index
    @analytics = GameAnalytics.new(period: period)
  end
 private
  def period
    @period ||= params[:period].to_s.presence_in(GameAnalytics::PERIODS.keys) || "all"
  end
 end
--- a/app/controllers/game_controller.rb
+++ b/app/controllers/game_controller.rb
@ -9,6 +9,7 @@ class GameController < ApplicationController
  layout "application"
  before_action :set_node, only: [ :stage, :answer, :stage_result ]
  after_action :track_step, only: [ :facts, :intro, :stage, :stage_result, :last_save, :done, :results ]
  helper_method :root_node,
                :stage_index,
@ -116,8 +117,36 @@ class GameController < ApplicationController
  end
  # POST -- thumbs up / down on the results screen. One rating per player;
  # tapping the other thumb (or the same one again) just overwrites it.
  def rate
    current_player.rate!(params[:direction])
    head :no_content
  end
 private
  # Records the furthest screen this player reached, so the admin funnel can
  # show drop-off for people who never answered anything.
  def track_step
    return unless response.successful?
    current_player.record_step(step_name)
  end
  def step_name
    case action_name
    when "stage"        then "stage_#{stage_index}"
    when "stage_result" then "stage_#{stage_index}_result"
    else action_name
    end
  end
  def root_node
    @root_node ||= Node.roots.viewable.first
  end
--- a/app/helpers/admin/analytics_helper.rb
+++ b/app/helpers/admin/analytics_helper.rb
@ -0,0 +1,26 @@
 module Admin::AnalyticsHelper
  # Colours a bar by what the answer does to the player's score, so a stage
  # reads at a glance: green = they made the good call, red = they didn't.
  def answer_tone(node)
    case node.template
    when "good_answer" then "positive"
    when "bad_answer"  then "negative"
    when "chance"      then "neutral"
    end
  end
  def band_tone(band)
    { best: "positive", balanced: "neutral", worst: "negative" }[band.to_sym]
  end
  def format_duration(seconds)
    return "—" if seconds.blank? || seconds.to_i.zero?
    seconds = seconds.to_i
    minutes, seconds = seconds.divmod(60)
    minutes.zero? ? "#{seconds}s" : "#{minutes}m #{seconds}s"
  end
 end
--- a/app/javascript/application.js
+++ b/app/javascript/application.js
@ -7,6 +7,7 @@ import IntroController from "intro_controller"
 import ChanceController from "chance_controller"
 import ShareController from "share_controller"
 import ModalController from "modal_controller"
 import RatingController from "rating_controller"
 const application = Application.start()
@ -16,6 +17,7 @@ application.register("intro", IntroController)
 application.register("chance", ChanceController)
 application.register("share", ShareController)
 application.register("modal", ModalController)
 application.register("rating", RatingController)
 // The whole game runs inside one turbo-frame so the URL never changes. Frame
 // navigations don't reset scroll the way a full page visit does, so each new
--- a/app/javascript/rating_controller.js
+++ b/app/javascript/rating_controller.js
@ -0,0 +1,31 @@
 import { Controller } from "@hotwired/stimulus"
 // Thumbs up / down on the results screen. Fire-and-forget: the button state
 // flips immediately and the POST is not awaited, so a slow network never makes
 // the tap feel dead. One rating per player -- tapping the other thumb just
 // overwrites the previous one server-side.
 export default class extends Controller {
  static targets = ["button"]
  static values = { url: String }
  rate(event) {
    const button = event.currentTarget
    const direction = button.dataset.direction
    this.buttonTargets.forEach((b) => b.classList.toggle("is-selected", b === button))
    const body = new FormData()
    body.append("direction", direction)
    fetch(this.urlValue, {
      method: "POST",
      body,
      headers: { "X-CSRF-Token": this.csrfToken },
      credentials: "same-origin"
    }).catch(() => {})
  }
  get csrfToken() {
    return document.querySelector("meta[name='csrf-token']")?.content || ""
  }
 }
--- a/app/models/player.rb
+++ b/app/models/player.rb
@ -7,6 +7,56 @@ class Player < ApplicationRecord
  SCORE_KEYS = %w[food_waste emissions income].freeze
  RATINGS = { up: 1, down: -1 }.freeze
  # Rank of every fixed screen, in the order the game walks them. Stage screens
  # are dynamic ("stage_3", "stage_3_result") so they get a rank computed from
  # the stage number instead of a fixed slot here.
  STEP_RANKS = { "start" => 0, "facts" => 1, "intro" => 2,
                 "last_save" => 900, "done" => 901, "results" => 902 }.freeze
  scope :rated,      -> { where.not(rating: nil) }
  scope :thumbs_up,   -> { where(rating: RATINGS[:up]) }
  scope :thumbs_down, -> { where(rating: RATINGS[:down]) }
  # Stage screens interleave: stage 1 (10), its result (11), stage 2 (12)...
  # Everything before stages sits below 10, everything after above 900.
  def self.step_rank(step)
    step = step.to_s
    return STEP_RANKS[step] if STEP_RANKS.key?(step)
    if (m = step.match(/\Astage_(\d+)(_result)?\z/))
      10 + (m[1].to_i * 2) + (m[2] ? 1 : 0)
    else
      -1
    end
  end
  # Never moves a player backwards -- replaying an earlier screen (or the
  # browser back button) must not undo the funnel position they reached.
  def record_step(step)
    step = step.to_s
    return if self.class.step_rank(step) <= self.class.step_rank(furthest_step)
    update_columns(furthest_step: step, updated_at: Time.current)
  end
  def rate!(direction)
    value = RATINGS[direction.to_s.to_sym]
    return false unless value
    update(rating: value, rated_at: Time.current)
  end
  def rating_direction
    RATINGS.key(rating)
  end
  # Normalises an arbitrary country code to one of the leaderboard's known
  # countries, or nil if it isn't one we track. Shared by the game controller
--- a/app/services/demo_activity.rb
+++ b/app/services/demo_activity.rb
@ -5,7 +5,7 @@
 # TEMPORARY: set ENABLED = false (or delete this) and wipe the players table
 # before the game goes live.
 class DemoActivity
  ENABLED = true
  ENABLED = false
  def self.simulate!
    return unless ENABLED
--- a/app/services/game_analytics.rb
+++ b/app/services/game_analytics.rb
@ -0,0 +1,290 @@
 # Gameplay analytics for the admin dashboard.
 #
 # Everything is derived from the `players` table -- there is no event log. Two
 # sources are combined:
 #
 #   * `progress` (JSONB) -- the answer a player picked on each stage. This is
 #     the record of what people *did*.
 #   * `furthest_step`   -- the furthest screen a player reached, recorded by
 #     GameController#track_step. This is the record of where people *stopped*,
 #     including the ones who quit before answering anything.
 #
 # Reach for a stage deliberately does NOT use `furthest_step` ranking: the
 # last-save early exit jumps a player straight to the end of the game, so a
 # rank comparison would credit them with stages they never saw. Instead a stage
 # counts as reached if the player answered it, or is sitting on it right now.
 class GameAnalytics
  include GameHelper
  # Screens outside the stage loop, in the order they appear. The last-save
  # branch is reported on its own rather than in the funnel -- it is an early
  # exit, not a step everybody walks through.
  PRE_STAGE_STEPS  = %w[facts intro].freeze
  POST_STAGE_STEPS = %w[done results].freeze
  PERIODS = {
    "all"  => nil,
    "24h"  => 1.day,
    "7d"   => 7.days,
    "30d"  => 30.days
  }.freeze
  attr_reader :period
  def initialize(period: "all")
    @period = PERIODS.key?(period.to_s) ? period.to_s : "all"
  end
  def players
    @players ||= begin
      window = PERIODS[period]
      window ? Player.where(created_at: window.ago..) : Player.all
    end
  end
  def total_players     = @total_players ||= players.count
  def completed_players = @completed_players ||= players.where(is_done: true).count
  def completion_rate   = percent(completed_players, total_players)
  # ---------------------------------------------------------------- ratings
  def ratings
    @ratings ||= begin
      counts = players.rated.group(:rating).count
      up   = counts[Player::RATINGS[:up]].to_i
      down = counts[Player::RATINGS[:down]].to_i
      {
        up: up,
        down: down,
        total: up + down,
        up_share: percent(up, up + down),
        down_share: percent(down, up + down),
        # Share of people who saw the results screen and bothered to vote. A vote
        # proves the player got there, so it also acts as the floor on reach --
        # players backfilled from before step tracking stop at "done".
        response_rate: percent(up + down, [ reached("results"), up + down ].max)
      }
    end
  end
  # ----------------------------------------------------------------- funnel
  # One row per screen, with how many players got that far and how many were
  # lost since the previous row.
  def funnel
    @funnel ||= begin
      rows = PRE_STAGE_STEPS.map { |step| { key: step, label: step_label(step), reached: reached(step) } }
      (1..n_stages).each do |i|
        rows << { key: "stage_#{i}", label: "Stage #{i}: #{stage_nodes[i - 1].title}", reached: reached_stage(i) }
      end
      rows += POST_STAGE_STEPS.map { |step| { key: step, label: step_label(step), reached: reached(step) } }
      # Clamped at zero: a row can read higher than the one above it when older
      # players predate step tracking and only have `progress` to go on.
      previous = total_players
      rows.map do |row|
        lost = [ previous - row[:reached], 0 ].max
        row.merge(
          share: percent(row[:reached], total_players),
          lost: lost,
          lost_share: percent(lost, previous)
        ).tap { previous = row[:reached] }
      end
    end
  end
  # Where players who never finished gave up. Sorted worst-first so the
  # stickiest screen is obvious.
  def drop_off_points
    @drop_off_points ||= players.where(is_done: false)
                                .where.not(furthest_step: nil)
                                .group(:furthest_step)
                                .count
                                .map { |step, count| { key: step, label: step_label(step), count: count } }
                                .sort_by { |row| -row[:count] }
  end
  # ---------------------------------------------------------------- answers
  # Per stage, how the answers were split. `progress` stores the node the
  # player landed on, so a chance answer is recorded as one of its *outcomes* --
  # those are rolled back up under the chance node they came from.
  def stages
    @stages ||= stage_nodes.each_with_index.map do |node, index|
      counts  = answer_counts(index + 1)
      answers = node.children.ordered.map { |answer| answer_row(answer, counts) }
      total   = answers.sum { |a| a[:count] }
      {
        index: index + 1,
        node: node,
        total: total,
        answers: answers.map { |a| a.merge(share: percent(a[:count], total)) }
      }
    end
  end
  # The compost-vs-landfill choice. Only players who took the early exit ever
  # see it, so `total` is much smaller than the stage totals.
  def last_save
    return { node: nil, total: 0, answers: [] } unless last_save_node
    @last_save ||= begin
      node = last_save_node
      counts  = players.where("jsonb_exists(progress, ?)", Player::LAST_SAVE_KEY)
                       .group(Arel.sql("progress->'#{Player::LAST_SAVE_KEY}'->>'answer_id'"))
                       .count
      answers = node.children.ordered.map do |answer|
        { node: answer, label: answer.title, count: counts[answer.id.to_s].to_i }
      end
      total = answers.sum { |a| a[:count] }
      { node: node, total: total, answers: answers.map { |a| a.merge(share: percent(a[:count], total)) } }
    end
  end
  # ----------------------------------------------------------------- scores
  # Which ending finished players landed on. Early exits are excluded -- their
  # headline comes from the last-save choice, not from the score, and they are
  # already broken out in #last_save.
  def result_bands
    @result_bands ||= begin
      scored = players.where(is_done: true)
                      .where("NOT jsonb_exists(progress, ?)", Player::LAST_SAVE_KEY)
                      .select(:score, :scores, :progress)
      counts = scored.group_by { |player| result_state(player) }.transform_values(&:size)
      total  = counts.values.sum
      %i[best balanced worst].map do |band|
        { band: band, count: counts[band].to_i, share: percent(counts[band].to_i, total) }
      end
    end
  end
  def average_score
    @average_score ||= players.where(is_done: true).average(:score)&.round(1)
  end
  # -------------------------------------------------------------- who plays
  def by_locale
    @by_locale ||= breakdown(players.group(:locale).count)
  end
  def by_country
    @by_country ||= breakdown(players.where.not(country: nil).group(:country).count)
  end
  # Rough time-on-task: a player row is touched on every screen, so the gap
  # between created_at and updated_at is how long they were playing.
  def median_duration
    @median_duration ||= players.where(is_done: true).pick(
      Arel.sql("percentile_cont(0.5) WITHIN GROUP (ORDER BY EXTRACT(EPOCH FROM (updated_at - created_at)))")
    )&.round
  end
 private
  def root_node
    @root_node ||= Node.roots.viewable.first
  end
  def stage_nodes
    @stage_nodes ||= root_node ? root_node.children.ordered.stage.to_a : []
  end
  def last_save_node
    @last_save_node ||= root_node&.children&.last_save&.first
  end
  def n_stages = stage_nodes.size
  # Cumulative reach for the fixed screens: anyone whose furthest step ranks at
  # or above this one passed through it.
  def reached(step)
    rank = Player.step_rank(step)
    @reach_by_rank ||= players.where.not(furthest_step: nil)
                              .group(:furthest_step)
                              .count
                              .transform_keys { |s| Player.step_rank(s) }
    @reach_by_rank.sum { |r, count| r >= rank ? count : 0 }
  end
  def reached_stage(index)
    players.where("jsonb_exists(progress, ?) OR furthest_step = ?", index.to_s, "stage_#{index}").count
  end
  def answer_counts(stage_index)
    players.where("jsonb_exists(progress, ?)", stage_index.to_s)
           .group(Arel.sql("progress->'#{stage_index.to_i}'->>'answer_id'"))
           .count
  end
  def answer_row(answer, counts)
    if answer.chance?
      outcomes = answer.children.ordered.map do |outcome|
        { node: outcome, label: outcome.title, count: counts[outcome.id.to_s].to_i }
      end
      total = outcomes.sum { |o| o[:count] }
      { node: answer, label: answer.title, chance: true, count: total,
        outcomes: outcomes.map { |o| o.merge(share: percent(o[:count], total)) } }
    else
      { node: answer, label: answer.title, chance: false,
        count: counts[answer.id.to_s].to_i, outcomes: [] }
    end
  end
  def breakdown(counts)
    total = counts.values.sum
    counts.sort_by { |_key, count| -count }
          .map { |key, count| { key: key, count: count, share: percent(count, total) } }
  end
  def step_label(step)
    case step
    when "facts"     then "Facts"
    when "intro"     then "Intro"
    when "last_save" then "Last save"
    when "done"      then "Final screen"
    when "results"   then "Results"
    when /\Astage_(\d+)_result\z/ then "Stage #{$1} result"
    when /\Astage_(\d+)\z/        then "Stage #{$1}"
    else step.to_s.humanize
    end
  end
  def percent(part, whole)
    return 0.0 if whole.to_i.zero?
    (part.to_f / whole * 100).round(1)
  end
 end
--- a/app/views/admin/analytics/_breakdown.html.erb
+++ b/app/views/admin/analytics/_breakdown.html.erb
@ -0,0 +1,22 @@
 <section class="analytics-panel">
  <h2><%= title %></h2>
  <% if rows.empty? %>
    <p class="analytics-empty">Nothing recorded yet.</p>
  <% else %>
    <div class="analytics-bars analytics-bars--compact">
      <% rows.each do |row| %>
        <div class="analytics-bar-row">
          <div class="analytics-bar-label"><%= labeller.call(row[:key]) %></div>
          <div class="analytics-bar-track">
            <div class="analytics-bar-fill" style="width: <%= row[:share] %>%"></div>
          </div>
          <div class="analytics-bar-value">
            <strong><%= number_with_delimiter(row[:count]) %></strong>
            <span><%= row[:share] %>%</span>
          </div>
        </div>
      <% end %>
    </div>
  <% end %>
 </section>
--- a/app/views/admin/analytics/_card.html.erb
+++ b/app/views/admin/analytics/_card.html.erb
@ -0,0 +1,7 @@
 <div class="analytics-card <%= local_assigns[:modifier] %>">
  <div class="analytics-card-value"><%= value %></div>
  <div class="analytics-card-label"><%= label %></div>
  <% if local_assigns[:sub].present? %>
    <div class="analytics-card-sub"><%= sub %></div>
  <% end %>
 </div>
--- a/app/views/admin/analytics/index.html.erb
+++ b/app/views/admin/analytics/index.html.erb
@ -0,0 +1,222 @@
 <%= content_for :title, "Analytics" %>
 <%= turbo_frame_tag 'main' do %>
  <%= turbo_stream.append 'flash', partial: 'layouts/flash' %>
  <div class="list-title">
    <h1><%= yield(:title) %></h1>
    <div class="analytics-periods">
      <% { "all" => "All time", "30d" => "30 days", "7d" => "7 days", "24h" => "24 hours" }.each do |key, label| %>
        <%= link_to label,
                    url_for(period: key),
                    class: class_names("analytics-period", current: period == key),
                    data: { turbo_frame: "main", turbo_action: "advance" } %>
      <% end %>
    </div>
  </div>
  <div class="analytics">
    <% if DemoActivity::ENABLED %>
      <p class="analytics-warning">
        <strong>Demo data is on.</strong>
        <code>DemoActivity</code> keeps inventing players with no gameplay to feed the leaderboard
        banner, so the counts below are inflated and the funnel shows a large drop before "Facts".
        Set <code>DemoActivity::ENABLED = false</code> and wipe the players table before go-live.
      </p>
    <% end %>
    <section class="analytics-cards">
      <%= render "card", label: "Players started", value: number_with_delimiter(@analytics.total_players) %>
      <%= render "card", label: "Finished", value: number_with_delimiter(@analytics.completed_players),
                         sub: "#{@analytics.completion_rate}% of starters" %>
      <%= render "card", label: "Median play time", value: format_duration(@analytics.median_duration) %>
      <%= render "card", label: "Average score", value: (@analytics.average_score || "—") %>
    </section>
    <section class="analytics-panel">
      <h2>Did you like this game?</h2>
      <% ratings = @analytics.ratings %>
      <% if ratings[:total].zero? %>
        <p class="analytics-empty">No votes yet.</p>
      <% else %>
        <div class="analytics-cards">
          <%= render "card", label: "Thumbs up", value: number_with_delimiter(ratings[:up]),
                             sub: "#{ratings[:up_share]}%", modifier: "positive" %>
          <%= render "card", label: "Thumbs down", value: number_with_delimiter(ratings[:down]),
                             sub: "#{ratings[:down_share]}%", modifier: "negative" %>
          <%= render "card", label: "Votes", value: number_with_delimiter(ratings[:total]),
                             sub: "#{ratings[:response_rate]}% of players who reached the results" %>
        </div>
        <div class="analytics-split">
          <div class="analytics-split-part positive" style="flex-grow: <%= ratings[:up] %>"></div>
          <div class="analytics-split-part negative" style="flex-grow: <%= ratings[:down] %>"></div>
        </div>
      <% end %>
    </section>
    <section class="analytics-panel">
      <h2>Funnel</h2>
      <p class="analytics-note">
        How far players got. The last-save early exit is a branch off the stages, so it is
        reported separately below rather than as a funnel step.
      </p>
      <div class="analytics-bars">
        <% @analytics.funnel.each do |row| %>
          <div class="analytics-bar-row">
            <div class="analytics-bar-label"><%= row[:label] %></div>
            <div class="analytics-bar-track">
              <div class="analytics-bar-fill" style="width: <%= row[:share] %>%"></div>
            </div>
            <div class="analytics-bar-value">
              <strong><%= number_with_delimiter(row[:reached]) %></strong>
              <span><%= row[:share] %>%</span>
            </div>
            <div class="analytics-bar-delta">
              <% if row[:lost] > 0 %>
                <span class="negative">-<%= number_with_delimiter(row[:lost]) %> (<%= row[:lost_share] %>%)</span>
              <% end %>
            </div>
          </div>
        <% end %>
      </div>
    </section>
    <section class="analytics-panel">
      <h2>Where unfinished players stopped</h2>
      <% if @analytics.drop_off_points.empty? %>
        <p class="analytics-empty">Nobody has abandoned a game yet.</p>
      <% else %>
        <div class="analytics-bars">
          <% max = @analytics.drop_off_points.first[:count] %>
          <% @analytics.drop_off_points.each do |row| %>
            <div class="analytics-bar-row">
              <div class="analytics-bar-label"><%= row[:label] %></div>
              <div class="analytics-bar-track">
                <div class="analytics-bar-fill negative" style="width: <%= (row[:count] * 100.0 / max).round(1) %>%"></div>
              </div>
              <div class="analytics-bar-value"><strong><%= number_with_delimiter(row[:count]) %></strong></div>
              <div class="analytics-bar-delta"></div>
            </div>
          <% end %>
        </div>
      <% end %>
    </section>
    <section class="analytics-panel">
      <h2>Answers by stage</h2>
      <% @analytics.stages.each do |stage| %>
        <div class="analytics-stage">
          <h3>
            <span class="analytics-stage-index"><%= stage[:index] %></span>
            <%= stage[:node].title %>
            <small><%= number_with_delimiter(stage[:total]) %> answers</small>
          </h3>
          <div class="analytics-bars">
            <% stage[:answers].each do |answer| %>
              <div class="analytics-bar-row">
                <div class="analytics-bar-label">
                  <%= answer[:label] %>
                  <%= tag.em(answer[:node].template.humanize) %>
                </div>
                <div class="analytics-bar-track">
                  <div class="analytics-bar-fill <%= answer_tone(answer[:node]) %>" style="width: <%= answer[:share] %>%"></div>
                </div>
                <div class="analytics-bar-value">
                  <strong><%= number_with_delimiter(answer[:count]) %></strong>
                  <span><%= answer[:share] %>%</span>
                </div>
                <div class="analytics-bar-delta"></div>
              </div>
              <% answer[:outcomes].each do |outcome| %>
                <div class="analytics-bar-row is-outcome">
                  <div class="analytics-bar-label">
                    ↳ <%= outcome[:label] %>
                    <%= tag.em(outcome[:node].template.humanize) %>
                  </div>
                  <div class="analytics-bar-track">
                    <div class="analytics-bar-fill <%= answer_tone(outcome[:node]) %>" style="width: <%= outcome[:share] %>%"></div>
                  </div>
                  <div class="analytics-bar-value">
                    <strong><%= number_with_delimiter(outcome[:count]) %></strong>
                    <span><%= outcome[:share] %>% of chances</span>
                  </div>
                  <div class="analytics-bar-delta"></div>
                </div>
              <% end %>
            <% end %>
          </div>
        </div>
      <% end %>
    </section>
    <% if @analytics.last_save[:node] %>
      <section class="analytics-panel">
        <h2>Last save <small>early exit — <%= number_with_delimiter(@analytics.last_save[:total]) %> players</small></h2>
        <% if @analytics.last_save[:total].zero? %>
          <p class="analytics-empty">No player has taken the early exit yet.</p>
        <% else %>
          <div class="analytics-bars">
            <% @analytics.last_save[:answers].each do |answer| %>
              <div class="analytics-bar-row">
                <div class="analytics-bar-label"><%= answer[:label] %></div>
                <div class="analytics-bar-track">
                  <div class="analytics-bar-fill" style="width: <%= answer[:share] %>%"></div>
                </div>
                <div class="analytics-bar-value">
                  <strong><%= number_with_delimiter(answer[:count]) %></strong>
                  <span><%= answer[:share] %>%</span>
                </div>
                <div class="analytics-bar-delta"></div>
              </div>
            <% end %>
          </div>
        <% end %>
      </section>
    <% end %>
    <section class="analytics-panel">
      <h2>Endings <small>finished players, excluding early exits</small></h2>
      <div class="analytics-bars">
        <% @analytics.result_bands.each do |band| %>
          <div class="analytics-bar-row">
            <div class="analytics-bar-label"><%= t("game.results.#{band[:band]}.headline", default: band[:band].to_s.humanize).html_safe %></div>
            <div class="analytics-bar-track">
              <div class="analytics-bar-fill <%= band_tone(band[:band]) %>" style="width: <%= band[:share] %>%"></div>
            </div>
            <div class="analytics-bar-value">
              <strong><%= number_with_delimiter(band[:count]) %></strong>
              <span><%= band[:share] %>%</span>
            </div>
            <div class="analytics-bar-delta"></div>
          </div>
        <% end %>
      </div>
    </section>
    <div class="analytics-columns">
      <%= render "breakdown", title: "Languages", rows: @analytics.by_locale, labeller: ->(key) { key } %>
      <%= render "breakdown", title: "Countries", rows: @analytics.by_country,
                              labeller: ->(key) { t("countries.#{key}", default: key.to_s.upcase) } %>
    </div>
  </div>
 <% end %>
--- a/app/views/game/results.html.erb
+++ b/app/views/game/results.html.erb
@ -64,13 +64,19 @@
  </details>
 </div>
 <div class="like-container">
 <div class="like-container" data-controller="rating" data-rating-url-value="<%= rate_path %>">
  <%= tag.h3 t("game.did_you_like_this_game") %>
  <div>
    <button class="thumbs-up"><%= svg "ico-thumb" %></button>
    <button class="thumbs-down"><%= svg "ico-thumb" %></button>
    <% { up: "thumbs-up", down: "thumbs-down" }.each do |direction, css_class| %>
      <button class="<%= class_names(css_class, "is-selected" => current_player.rating_direction == direction) %>"
              type="button"
              aria-label="<%= direction %>"
              data-direction="<%= direction %>"
              data-rating-target="button"
              data-action="rating#rate"><%= svg "ico-thumb" %></button>
    <% end %>
  </div>
 </div>
--- a/app/views/layouts/admin.html.erb
+++ b/app/views/layouts/admin.html.erb
@ -9,13 +9,13 @@
    <%= csrf_meta_tags %>
    <%= csp_meta_tag %>    
    <%= stylesheet_link_tag "admin", "lexxy", "tom-select", "popup-menu", "forms", "lists", "assets", "nodes", "attachments" %>    
    <%= stylesheet_link_tag "admin", "lexxy", "tom-select", "popup-menu", "forms", "lists", "assets", "nodes", "attachments", "analytics" %>    
    <%= javascript_importmap_tags 'admin' %>
  </head>
  <body>
    <nav id="navbar">      
      <div class="navbar-upper">
        <% %i[nodes assets].each do |c| %>
        <% %i[nodes assets analytics].each do |c| %>
          <%= link_to url_for(controller: c, action: 'index'), 
                      class: (controller_name == c.to_s ? 'navbar-link current' : 'navbar-link'),
                      data: {
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@ -17,7 +17,7 @@
    <link rel="icon" sizes="192x192" href="/ikea-favicon-300x300.png">    
    <%= stylesheet_link_tag "reset", "application" %>  
    <%= frontend_javascript_importmap_tags %w[application @hotwired/turbo-rails @hotwired/stimulus language_menu_controller carousel_controller intro_controller chance_controller share_controller modal_controller] %>
    <%= frontend_javascript_importmap_tags %w[application @hotwired/turbo-rails @hotwired/stimulus language_menu_controller carousel_controller intro_controller chance_controller share_controller modal_controller rating_controller] %>
  </head>
  <body id="page">
    <%= turbo_frame_tag "game" do %>
--- a/config/importmap.rb
+++ b/config/importmap.rb
@ -20,3 +20,4 @@ pin "intro_controller", preload: false
 pin "chance_controller", preload: false
 pin "share_controller", preload: false
 pin "modal_controller", preload: false
 pin "rating_controller", preload: false
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@ -390,6 +390,7 @@ en:
  icons:
    assets: image
    analytics: bar_chart
    users: person
    nodes: file_copy
    tags: sell
--- a/config/routes.rb
+++ b/config/routes.rb
@ -34,6 +34,9 @@ Rails.application.routes.draw do
      # Users
      resources :users
      # Analytics
      get "analytics", to: "analytics#index"
      # Root
      root to: "nodes#index"
    end
@ -75,6 +78,7 @@ Rails.application.routes.draw do
    get "done", to: "game#done"
    get "results", to: "game#results"
    post "results/rating", to: "game#rate", as: :rate
    get "", to: "game#index", as: :locale_root
  end
--- a/db/migrate/20260825120000_add_analytics_to_players.rb
+++ b/db/migrate/20260825120000_add_analytics_to_players.rb
@ -0,0 +1,15 @@
 class AddAnalyticsToPlayers < ActiveRecord::Migration[8.1]
  def change
    # Furthest screen the player reached, so drop-off can be measured for
    # people who quit before ever answering anything (progress stays empty).
    add_column :players, :furthest_step, :string
    # Thumbs up (1) / thumbs down (-1) from the results screen. One per player.
    add_column :players, :rating, :integer
    add_column :players, :rated_at, :datetime
    add_index :players, :furthest_step
    add_index :players, :rating
    add_index :players, :created_at
  end
 end
--- a/db/migrate/20260825120001_backfill_player_furthest_step.rb
+++ b/db/migrate/20260825120001_backfill_player_furthest_step.rb
@ -0,0 +1,29 @@
 # Existing players predate step tracking, so the funnel would start empty.
 # Their `progress` still says which stages they answered -- good enough to
 # reconstruct roughly how far they got. Players with no progress at all are
 # left alone: there is nothing to infer from.
 class BackfillPlayerFurthestStep < ActiveRecord::Migration[8.1]
  def up
    Player.where(furthest_step: nil).find_each do |player|
      stages = player.progress.keys.grep(/\A\d+\z/).map(&:to_i)
      next if stages.empty? && !player.progress.key?(Player::LAST_SAVE_KEY)
      # is_done is set on the final screen, not the results screen, so stop
      # there rather than claiming they saw the results.
      step =
        if player.is_done?
          "done"
        elsif player.progress.key?(Player::LAST_SAVE_KEY)
          "last_save"
        else
          "stage_#{stages.max}_result"
        end
      player.update_column(:furthest_step, step)
    end
  end
  def down
    # No-op: the reconstructed values are indistinguishable from live ones.
  end
 end
--- a/db/schema.rb
+++ b/db/schema.rb
@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 ActiveRecord::Schema[8.1].define(version: 2026_07_03_000000) do
 ActiveRecord::Schema[8.1].define(version: 2026_08_25_120001) do
  # These are extensions that must be enabled in order to support this database
  enable_extension "pg_catalog.plpgsql"
@ -117,15 +117,21 @@ ActiveRecord::Schema[8.1].define(version: 2026_07_03_000000) do
  create_table "players", force: :cascade do |t|
    t.string "country"
    t.datetime "created_at", null: false
    t.string "furthest_step"
    t.boolean "is_done", default: false, null: false
    t.string "locale", null: false
    t.jsonb "progress", default: {}, null: false
    t.datetime "rated_at"
    t.integer "rating"
    t.integer "score", default: 0, null: false
    t.jsonb "scores", default: {}, null: false
    t.datetime "updated_at", null: false
    t.index ["country"], name: "index_players_on_country"
    t.index ["created_at"], name: "index_players_on_created_at"
    t.index ["furthest_step"], name: "index_players_on_furthest_step"
    t.index ["is_done"], name: "index_players_on_is_done"
    t.index ["locale"], name: "index_players_on_locale"
    t.index ["rating"], name: "index_players_on_rating"
  end
  create_table "quiz_results", force: :cascade do |t|