finished Skin UGC

nonpacks/static/vendor/blockbench/plugins/packs_bootstrap.js

@@ -124,8 +124,45 @@
         }
     }
 
+    // Open a Minecraft Skin project (Steve/Alex player model) with the skin.
+    async function openSkin(msg) {
+        await waitFor(() => typeof Formats !== 'undefined' && !!Formats.skin, 15000);
+        const model = msg.model === 'alex' ? 'alex' : 'steve';
+        const dialog = Formats.skin.setup_dialog;
+        dialog.show();
+        await dialog.setFormValues({
+            model: model,
+            texture_source: 'upload_texture',
+            texture_file: { content: msg.dataUrl, name: 'skin.png', path: 'skin.png' },
+            layer_template: true,
+        });
+        dialog.confirm();
+        // Reveal every cube (incl. the outer layer) and land in Pose mode.
+        await new Promise((r) => setTimeout(r, 700));
+        try {
+            (typeof Cube !== 'undefined' && Cube.all || []).forEach((c) => { c.visibility = true; });
+            if (typeof Canvas !== 'undefined' && Canvas.updateAll) Canvas.updateAll();
+            const pose = Modes && Modes.options && Modes.options.pose;
+            if (pose && typeof pose.select === 'function') pose.select();
+        } catch (e) {
+            console.error('packs skin post-load', e);
+        }
+        notify('model-open', { name: msg.name || 'skin' });
+    }
+
     window.addEventListener('message', (e) => {
-        if (!e.data || e.data.type !== 'packs-open-model') return;
+        if (!e.data) return;
+        if (e.data.type === 'packs-open-skin') {
+            openSkin(e.data).then(
+                () => {},
+                (err) => {
+                    console.error('packs-open-skin failed', err);
+                    notify('model-error', { name: e.data.name || '', error: String(err) });
+                }
+            );
+            return;
+        }
+        if (e.data.type !== 'packs-open-model') return;
         openModel(e.data).then(
             () => {},
             (err) => {