From 52bec7354d21192bec88622b60dbfb31b3791460 Mon Sep 17 00:00:00 2001
From: Ryan Weaver <ryan@symfonycasts.com>
Date: Sat, 17 Feb 2024 07:00:32 -0500
Subject: [PATCH] WIP - playing with Autocomplete + morph

---
 src/Autocomplete/assets/dist/controller.d.ts  |  2 +
 src/Autocomplete/assets/dist/controller.js    | 53 ++++++++++---
 src/Autocomplete/assets/src/controller.ts     | 78 ++++++++++++++++---
 ux.symfony.com/src/Form/TimeForAMealForm.php  |  4 +
 ux.symfony.com/templates/base.html.twig       |  2 +
 .../ux_packages/autocomplete.html.twig        |  6 +-
 6 files changed, 121 insertions(+), 24 deletions(-)

diff --git a/src/Autocomplete/assets/dist/controller.d.ts b/src/Autocomplete/assets/dist/controller.d.ts
index 091fcd4c25a..8d62db42dba 100644
--- a/src/Autocomplete/assets/dist/controller.d.ts
+++ b/src/Autocomplete/assets/dist/controller.d.ts
@@ -50,4 +50,6 @@ export default class extends Controller {
     private onMutations;
     private createOptionsDataStructure;
     private areOptionsEquivalent;
+    private beforeMorphElement;
+    private beforeMorphAttribute;
 }
diff --git a/src/Autocomplete/assets/dist/controller.js b/src/Autocomplete/assets/dist/controller.js
index 5659d9bcc17..9b472b7119e 100644
--- a/src/Autocomplete/assets/dist/controller.js
+++ b/src/Autocomplete/assets/dist/controller.js
@@ -42,6 +42,12 @@ class default_1 extends Controller {
         if (this.selectElement) {
             this.originalOptions = this.createOptionsDataStructure(this.selectElement);
         }
+        const parentElement = this.element.parentElement;
+        if (!parentElement) {
+            return;
+        }
+        parentElement.addEventListener('turbo:before-morph-element', this.beforeMorphElement.bind(this));
+        parentElement.addEventListener('turbo:before-morph-attribute', this.beforeMorphAttribute.bind(this));
         this.initializeTomSelect();
     }
     initializeTomSelect() {
@@ -61,6 +67,12 @@ class default_1 extends Controller {
     }
     disconnect() {
         this.stopMutationObserver();
+        const parentElement = this.element.parentElement;
+        if (!parentElement) {
+            return;
+        }
+        parentElement.removeEventListener('turbo:before-morph-element', this.beforeMorphElement.bind(this));
+        parentElement.removeEventListener('turbo:before-morph-attribute', this.beforeMorphAttribute.bind(this));
         let currentSelectedValues = [];
         if (this.selectElement) {
             if (this.selectElement.multiple) {
@@ -156,15 +168,13 @@ class default_1 extends Controller {
         }
     }
     onMutations(mutations) {
-        let changeDisabledState = false;
         let requireReset = false;
+        if (this.tomSelect.isDisabled !== this.formElement.disabled) {
+            this.changeTomSelectDisabledState(this.formElement.disabled);
+        }
         mutations.forEach((mutation) => {
             switch (mutation.type) {
                 case 'attributes':
-                    if (mutation.target === this.element && mutation.attributeName === 'disabled') {
-                        changeDisabledState = true;
-                        break;
-                    }
                     if (mutation.target === this.element && mutation.attributeName === 'multiple') {
                         const isNowMultiple = this.element.hasAttribute('multiple');
                         const wasMultiple = mutation.oldValue === 'multiple';
@@ -178,13 +188,12 @@ class default_1 extends Controller {
         });
         const newOptions = this.selectElement ? this.createOptionsDataStructure(this.selectElement) : [];
         const areOptionsEquivalent = this.areOptionsEquivalent(newOptions);
-        if (!areOptionsEquivalent || requireReset) {
+        const value = this.selectElement ? Array.from(this.selectElement.options || []).map((option) => option.value) : this.formElement.value;
+        const didValueChange = value !== this.tomSelect.getValue();
+        if (!areOptionsEquivalent || requireReset || didValueChange) {
             this.originalOptions = newOptions;
             this.resetTomSelect();
         }
-        if (changeDisabledState) {
-            this.changeTomSelectDisabledState(this.formElement.disabled);
-        }
     }
     createOptionsDataStructure(selectElement) {
         return Array.from(selectElement.options).map((option) => {
@@ -208,6 +217,32 @@ class default_1 extends Controller {
         return (originalOptionsSet.size === newOptionsSet.size &&
             [...originalOptionsSet].every((option) => newOptionsSet.has(option)));
     }
+    beforeMorphElement(event) {
+        if (event.target.classList.contains('ts-wrapper')) {
+            event.preventDefault();
+            return;
+        }
+        if (event.target === this.element) {
+            const newOptions = this.selectElement ? this.createOptionsDataStructure(this.selectElement) : [];
+            if (this.areOptionsEquivalent(newOptions)) {
+                event.preventDefault();
+                return;
+            }
+        }
+    }
+    beforeMorphAttribute(event) {
+        if (event.target.tagName === 'LABEL') {
+            console.log('before morph attribute', event.detail);
+        }
+        if (event.target.tagName === 'LABEL' && ['for', 'id'].includes(event.detail.attributeName)) {
+            event.preventDefault();
+            return;
+        }
+        if (event.target === this.element && event.detail.attributeName === 'class') {
+            event.preventDefault();
+            return;
+        }
+    }
 }
 _default_1_instances = new WeakSet(), _default_1_getCommonConfig = function _default_1_getCommonConfig() {
     const plugins = {};
diff --git a/src/Autocomplete/assets/src/controller.ts b/src/Autocomplete/assets/src/controller.ts
index bc3812b7a82..46252f0d205 100644
--- a/src/Autocomplete/assets/src/controller.ts
+++ b/src/Autocomplete/assets/src/controller.ts
@@ -52,6 +52,13 @@ export default class extends Controller {
         if (this.selectElement) {
             this.originalOptions = this.createOptionsDataStructure(this.selectElement);
         }
+        // TODO - also listen on `live:before-morph-element`
+        const parentElement = this.element.parentElement;
+        if (!parentElement) {
+            return;
+        }
+        parentElement.addEventListener('turbo:before-morph-element', this.beforeMorphElement.bind(this));
+        parentElement.addEventListener('turbo:before-morph-attribute', this.beforeMorphAttribute.bind(this));
 
         this.initializeTomSelect();
     }
@@ -85,6 +92,13 @@ export default class extends Controller {
     disconnect() {
         this.stopMutationObserver();
 
+        const parentElement = this.element.parentElement;
+        if (!parentElement) {
+            return;
+        }
+        parentElement.removeEventListener('turbo:before-morph-element', this.beforeMorphElement.bind(this));
+        parentElement.removeEventListener('turbo:before-morph-attribute', this.beforeMorphAttribute.bind(this));
+
         // TomSelect.destroy() resets the element to its original HTML. This
         // causes the selected value to be lost. We store it.
         let currentSelectedValues: string[] = [];
@@ -373,18 +387,15 @@ export default class extends Controller {
     }
 
     private onMutations(mutations: MutationRecord[]): void {
-        let changeDisabledState = false;
         let requireReset = false;
 
+        if (this.tomSelect.isDisabled !== this.formElement.disabled) {
+            this.changeTomSelectDisabledState(this.formElement.disabled);
+        }
+
         mutations.forEach((mutation) => {
             switch (mutation.type) {
                 case 'attributes':
-                    if (mutation.target === this.element && mutation.attributeName === 'disabled') {
-                        changeDisabledState = true;
-
-                        break;
-                    }
-
                     if (mutation.target === this.element && mutation.attributeName === 'multiple') {
                         const isNowMultiple = this.element.hasAttribute('multiple');
                         const wasMultiple = mutation.oldValue === 'multiple';
@@ -401,14 +412,15 @@ export default class extends Controller {
 
         const newOptions = this.selectElement ? this.createOptionsDataStructure(this.selectElement) : [];
         const areOptionsEquivalent = this.areOptionsEquivalent(newOptions);
-        if (!areOptionsEquivalent || requireReset) {
+
+        // TODO: test this: look for changes in the "value" of the select element
+        const value = this.selectElement ? Array.from(this.selectElement.options || []).map((option) => option.value) : this.formElement.value;
+        const didValueChange = value !== this.tomSelect.getValue();
+
+        if (!areOptionsEquivalent || requireReset || didValueChange) {
             this.originalOptions = newOptions;
             this.resetTomSelect();
         }
-
-        if (changeDisabledState) {
-            this.changeTomSelectDisabledState(this.formElement.disabled);
-        }
     }
 
     private createOptionsDataStructure(
@@ -443,4 +455,46 @@ export default class extends Controller {
             [...originalOptionsSet].every((option) => newOptionsSet.has(option))
         );
     }
+
+    private beforeMorphElement(event: any) {
+        // TomSelect adds this element to the DOM. Keep it.
+        if (event.target.classList.contains('ts-wrapper')) {
+            event.preventDefault();
+
+            return;
+        }
+
+        if (event.target === this.element) {
+            const newOptions = this.selectElement ? this.createOptionsDataStructure(this.selectElement) : [];
+            if (this.areOptionsEquivalent(newOptions)) {
+                // prevent the <option> elements from being mutated, as this will
+                // change their order, which befuddles TomSelect (who changes the
+                // order of the <option> elements when you select them)
+                // this will, unfortunately, prevent any changes attributed on
+                // the select element from being updated.
+                event.preventDefault();
+
+                return;
+            }
+        }
+    }
+
+    private beforeMorphAttribute(event: any) {
+        if (event.target.tagName === 'LABEL') {
+            console.log('before morph attribute', event.detail);
+        }
+        // TomSelect changes the label "for". Keep that change.
+        if (event.target.tagName === 'LABEL' && ['for', 'id'].includes(event.detail.attributeName)) {
+            event.preventDefault();
+
+            return;
+        }
+
+        // TomSelect changes the root element's class. Keep that change.
+        if (event.target === this.element && event.detail.attributeName === 'class') {
+            event.preventDefault();
+
+            return;
+        }
+    }
 }
diff --git a/ux.symfony.com/src/Form/TimeForAMealForm.php b/ux.symfony.com/src/Form/TimeForAMealForm.php
index 7874890b88f..0fee6c55bd9 100644
--- a/ux.symfony.com/src/Form/TimeForAMealForm.php
+++ b/ux.symfony.com/src/Form/TimeForAMealForm.php
@@ -14,6 +14,7 @@
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\Extension\Core\Type\TextType;
 use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\Validator\Constraints\NotBlank;
 
 class TimeForAMealForm extends AbstractType
 {
@@ -23,6 +24,9 @@ public function buildForm(FormBuilderInterface $builder, array $options): void
             ->add('foods', FoodAutocompleteField::class)
             ->add('name', TextType::class, [
                 'label' => 'What should we call this meal?',
+                'constraints' => [
+                    new NotBlank(),
+                ],
             ])
         ;
     }
diff --git a/ux.symfony.com/templates/base.html.twig b/ux.symfony.com/templates/base.html.twig
index 9b3a562a5b5..6c25d2cbdb1 100644
--- a/ux.symfony.com/templates/base.html.twig
+++ b/ux.symfony.com/templates/base.html.twig
@@ -11,6 +11,8 @@
             <link rel="canonical" href="{{ meta.canonical }}">
         {% endif %}
         <meta name="view-transition" content="same-origin" />
+        <meta name="turbo-refresh-method" content="morph">
+        <meta name="turbo-refresh-scroll" content="preserve">
         <link rel="icon" href="/favicon.ico" sizes="48x48">
         <link rel="icon" href="/favicon.svg" sizes="any" type="image/svg+xml">
         <link rel="apple-touch-icon" href="/apple-touch-icon.png">
diff --git a/ux.symfony.com/templates/ux_packages/autocomplete.html.twig b/ux.symfony.com/templates/ux_packages/autocomplete.html.twig
index 042e0b79787..c902755fa43 100644
--- a/ux.symfony.com/templates/ux_packages/autocomplete.html.twig
+++ b/ux.symfony.com/templates/ux_packages/autocomplete.html.twig
@@ -31,7 +31,7 @@
 
 {% block demo_content %}
     {# The frame is used just to keep the form submit all in one place: it feels nice #}
-    <turbo-frame id="autocomplete-demo-form">
+    <div id="autocomplete-demo-form">
         {% for message in app.flashes('autocomplete_success') %}
             <div class="alert alert-success" data-turbo-cache="false">{{ message }}</div>
         {% endfor %}
@@ -41,7 +41,7 @@
 
             {{ form_row(form.name) }}
 
-            <button type="submit" class="btn btn-primary">Let's Nom!</button>
+            <button type="submit" class="btn btn-primary" formnovalidate>Let's Nom!</button>
         {{ form_end(form) }}
-    </turbo-frame>
+    </div>
 {% endblock %}