Copy selected/focus face picker styles from Impress 2020

Here, I remember the trick I learned when building the outfit viewer:
web components are great for making sure stuff stays initialized well
in a Turbo environment!

The problem was, after submitting the form and getting a new preview
loaded via Turbo, the part where we remove `inert` would get undone.
Additionally, this script only loads *once* per session, so if you
Turbo-nav to a different item then that part of the page never ran.

Instead, we use web components to remove the attributes on mount, then
again if they're ever reapplied by Idiomorph.

app/assets/javascripts/items/show.js

@@ -1,6 +1,6 @@
-// When the species *face* picker changes, update and submit the main picker form.
-document.addEventListener("click", (e) => {
-    if (!e.target.matches(".species-face-picker input[type=radio]")) return;
+// When the species face picker changes, update and submit the main picker form.
+document.addEventListener("change", (e) => {
+    if (!e.target.matches("species-face-picker")) return;
 
     try {
         const mainPicker = document.querySelector("#item-preview .species-color-picker");
@@ -14,8 +14,43 @@ document.addEventListener("click", (e) => {
     }
 });
 
-// Now that the face picker is ready to go, mark it as usable.
-for (const options of document.querySelectorAll(".species-face-picker-options")) {
-    options.removeAttribute("inert");
-    options.removeAttribute("aria-hidden");
+class SpeciesFacePicker extends HTMLElement {
+    connectedCallback() {
+        this.addEventListener("click", this.#handleClick);
+    }
+
+    get value() {
+        return this.querySelector("input[type=radio]:checked")?.value;
+    }
+
+    #handleClick(e) {
+        if (e.target.matches("input[type=radio]")) {
+            this.dispatchEvent(new Event("change", {bubbles: true}));
+        }
+    }
 }
+
+class SpeciesFacePickerOptions extends HTMLElement {
+    static observedAttributes = ["inert", "aria-hidden"];
+
+    connectedCallback() {
+        // Once this component is loaded, we stop being inert and aria-hidden. We're ready!
+        this.#activate();
+    }
+
+    attributeChangedCallback() {
+        // If a Turbo Frame tries to morph us into being inert again, activate again!
+        // (It's important that the server's HTML always return `inert`, for progressive
+        // enhancement; and it's important to morph this element, so radio focus state
+        // is preserved. To thread that needle, we have to monitor and remove!)
+        this.#activate();
+    }
+
+    #activate() {
+        this.removeAttribute("inert");
+        this.removeAttribute("aria-hidden");
+    }
+}
+
+customElements.define("species-face-picker", SpeciesFacePicker);
+customElements.define("species-face-picker-options", SpeciesFacePickerOptions);

app/assets/stylesheets/items/_show.sass

@@ -161,9 +161,46 @@ body.items-show
         border-color: $error-border-color
         color: $error-color
 
-  .species-face-picker
+  species-face-picker
+    display: block
     position: relative
 
+    species-face-picker-options
+      display: flex
+      flex-wrap: wrap
+
+    img
+      width: 50px
+      height: 50px
+      transition: all 0.2s
+
+      // Calm down the default color, just a smidge! There's a lot of color
+      // on this page already, y'know?
+      opacity: .9
+      filter: saturate(90%)
+
+    label
+      display: flex
+      overflow: hidden
+      transition: all 0.2s
+      position: relative
+      line-height: 1
+
+      // NOTE: The box-shadows here were copy-pasted from Impress 2020, which uses
+      //       Chakra UI's styling system to generate them! (The colors are from their
+      //       color palette, too.)
+      &:has(input:checked)
+        border-radius: 6px
+        z-index: 1
+        background: #9AE6B4
+        box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1),0 10px 10px -5px rgba(0, 0, 0, 0.04), #2F855A 0 0 2px 2px
+        transform: scale(1.1)
+
+      &:has(input:focus)
+        background: #BEE3F8
+        box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1),0 10px 10px -5px rgba(0, 0, 0, 0.04), #4299e1 0 0 0 3px
+        transform: scale(1.2)
+
     input[type=radio]
       position: absolute
       left: -10000px
@@ -172,21 +209,30 @@ body.items-show
       height: 1px
       overflow: hidden
 
-      &:not(:checked) + img
-        opacity: .5
+      &:checked + img
+        opacity: 1
+        filter: saturate(110%)
+
+      &:disabled + img
+        opacity: .6
+        filter: saturate(0%)
+
+    label:has(input[type=radio]:disabled)
+      cursor: not-allowed
 
     noscript
       position: absolute
       inset: 0
       background: rgba(white, .75)
       z-index: 1
+      cursor: auto
 
       display: flex
       align-items: center
       justify-content: center
       text-align: center
 
-    &:has(.species-face-picker-options[inert])
+    &:has(species-face-picker-options[inert])
       cursor: wait
 
   .item-zones-info

app/helpers/items_helper.rb

@@ -33,7 +33,9 @@ module ItemsHelper
   def standard_species_search_links
     all_species = Species.alphabetical.map(&:id)
     PetType.random_basic_per_species(all_species).map do |pet_type|
-      image = pet_type_image(pet_type, :happy, :zoom)
+      human_name = pet_type.species.human_name
+      image = pet_type_image pet_type, :happy, :zoom,
+                             alt: human_name, title: human_name
       query = "species:#{pet_type.species.name}"
       link_to(image, items_path(:q => query))
     end.join.html_safe
@@ -222,6 +224,18 @@ module ItemsHelper
     cookies["DTIOutfitViewerIsPlaying"] == "true"
   end
 
+  def item_fits?(item, pet_type)
+    item.appearances.any? { |a| a.fits? pet_type }
+  end
+
+  def species_face_tooltip(pet_type, item)
+    if item_fits?(item, pet_type)
+      "#{pet_type.species.human_name}"
+    else
+      "#{pet_type.species.human_name}: No data yet"
+    end
+  end
+
   def item_zone_partial_fit?(appearances_in_zone, all_appearances)
     appearances_in_zone.size < all_appearances.size
   end
@@ -230,12 +244,13 @@ module ItemsHelper
     appearances_in_zone.map(&:species).uniq.map(&:human_name).sort.join(", ")
   end
 
-  private
-
-  def pet_type_image(pet_type, emotion, size)
+  def pet_type_image(pet_type, emotion, size, **options)
     src = pet_type_image_url(pet_type, emotion:, size:)
-    human_name = pet_type.species.name.humanize
-    image_tag(src, :alt => human_name, :title => human_name)
+    srcset = if size == :face
+      [[pet_type_image_url(pet_type, emotion:, size: :face_2x), "2x"]]
+    end
+
+    image_tag(src, srcset:, **options)
   end
 
   def item_header_user_lists_form_state

app/models/item.rb

@@ -502,7 +502,7 @@ class Item < ApplicationRecord
   Appearance = Struct.new(:item, :body, :swf_assets) do
     include ActiveModel::Serializers::JSON
     delegate :present?, :empty?, to: :swf_assets
-    delegate :species, to: :body
+    delegate :species, :fits?, :fits_all?, to: :body
 
     def attributes
       {item:, body:, swf_assets:}
@@ -522,6 +522,14 @@ class Item < ApplicationRecord
     def attributes
       {id:, species:}
     end
+
+    def fits_all?
+      id == 0
+    end
+
+    def fits?(target)
+      fits_all? || target.body_id == id
+    end
   end
 
   def appearances

app/views/items/show.html.haml

@@ -33,19 +33,24 @@
         "id", "human_name", @selected_preview_pet_type.species_id)
     = submit_tag "Go", name: nil
 
-  %form.species-face-picker
+  %species-face-picker
     %noscript
       This fancy species picker requires Javascript, but you can still use the
       dropdowns instead!
-    .species-face-picker-options{
-      "inert": true, # waits for JS to remove
+    %species-face-picker-options{
+      inert: true, # waits for JS to remove
       "aria-hidden": true, # waits for JS to remove
     }
       - @preview_pet_type_options.each do |pet_type|
-        %label
+        %label{
+          title: species_face_tooltip(pet_type, @item),
+        }
           = radio_button_tag "species_face_id", pet_type.species_id,
-            checked: pet_type == @preview_outfit.pet_type
-          = pet_type_image pet_type, :happy, :face
+            checked: pet_type == @preview_outfit.pet_type,
+            disabled: !item_fits?(@item, pet_type)
+          = pet_type_image pet_type,
+            item_fits?(@item, pet_type) ? :happy : :sad,
+            :face
 
   .item-zones-info
     %section