Remove SwfAsset#html5_*_url in favor of SwfAsset#urls

The alt styles controller is the one place we use this right now, but
I'm planning to generalize this to loading appearances during item
search, too!

I also add more `only` fields to the alt styles `as_json` call, because
idk it feels like good practice to both 1) say what we need in this
endpoint, rather than rely on default behavior upstream, and 2) to
avoid leaking fields we didn't realize were on there. (And also to
preserve bandwidth, too!)

app/controllers/alt_styles_controller.rb

@@ -16,10 +16,13 @@ class AltStylesController < ApplicationController
 			format.html { render }
 			format.json {
 				render json: @alt_styles.includes(swf_assets: [:zone]).as_json(
+					only: [:id, :species_id, :color_id, :body_id, :series_name,
+								 :adjective_name, :thumbnail_url],
 					include: {
 						swf_assets: {
+							only: [:id, :body_id],
 							include: [:zone],
-							methods: [:html5_image_url, :html5_svg_url],
+							methods: [:urls],
 						}
 					},
 					methods: [:series_name, :adjective_name, :thumbnail_url],

app/javascript/wardrobe-2020/loaders/alt-styles.js

@@ -72,11 +72,9 @@ function normalizeSwfAssetToLayer(swfAssetData) {
 		bodyId: swfAssetData.body_id,
 		knownGlitches: [], // TODO
 
-		// HACK: We're just simplifying this adapter, but it would be better to
+		svgUrl: swfAssetData.urls.svg,
-		// actually check what file formats the manifest says!
+		canvasMovieLibraryUrl: swfAssetData.urls.canvas_library,
-		svgUrl: swfAssetData.html5_svg_url,
+		imageUrl: swfAssetData.urls.png,
-		canvasMovieLibraryUrl: null,
+		swfUrl: swfAssetData.urls.swf,
-		imageUrl: swfAssetData.html5_image_url,
-		swfUrl: swfAssetData.url,
 	};
 }

app/models/swf_asset.rb

@@ -45,6 +45,7 @@ class SwfAsset < ApplicationRecord
       swf: url,
       png: image_url,
       svg: manifest_asset_urls[:svg],
+      canvas_library: manifest_asset_urls[:js],
       manifest: manifest_url,
     }
   end
@@ -147,14 +148,6 @@ class SwfAsset < ApplicationRecord
     ).to_s
   end
 
-  def html5_image_url
-    manifest_asset_urls[:png]
-  end
-
-  def html5_svg_url
-    manifest_asset_urls[:svg]
-  end
-
   def known_glitches
     self[:known_glitches].split(',')
   end