Prioritize group settings, improve panel titles, disable submit without changes

3 files changed, 104 insertions, 0 deletions

diff --git a/app/assets/javascripts/dirty_submit/dirty_submit_collection.js b/app/assets/javascripts/dirty_submit/dirty_submit_collection.js
new file mode 100644
index 00000000000..42b051b2270
--- /dev/null
+++ b/app/assets/javascripts/dirty_submit/dirty_submit_collection.js
@@ -0,0 +1,13 @@
+import DirtySubmitForm from './dirty_submit_form';
+
+class DirtySubmitCollection {
+  constructor(forms) {
+    this.forms = forms;
+
+    this.dirtySubmits = [];
+
+    this.forms.forEach(form => this.dirtySubmits.push(new DirtySubmitForm(form)));
+  }
+}
+
+export default DirtySubmitCollection;
diff --git a/app/assets/javascripts/dirty_submit/dirty_submit_factory.js b/app/assets/javascripts/dirty_submit/dirty_submit_factory.js
new file mode 100644
index 00000000000..95a896a7f0b
--- /dev/null
+++ b/app/assets/javascripts/dirty_submit/dirty_submit_factory.js
@@ -0,0 +1,9 @@
+import DirtySubmitCollection from './dirty_submit_collection';
+import DirtySubmitForm from './dirty_submit_form';
+
+export default function dirtySubmitFactory(formOrForms) {
+  const isCollection = formOrForms instanceof NodeList || formOrForms instanceof Array;
+  const DirtySubmitClass = isCollection ? DirtySubmitCollection : DirtySubmitForm;
+
+  return new DirtySubmitClass(formOrForms);
+}
diff --git a/app/assets/javascripts/dirty_submit/dirty_submit_form.js b/app/assets/javascripts/dirty_submit/dirty_submit_form.js
new file mode 100644
index 00000000000..5bea47f23c5
--- /dev/null
+++ b/app/assets/javascripts/dirty_submit/dirty_submit_form.js
@@ -0,0 +1,82 @@
+import _ from 'underscore';
+
+class DirtySubmitForm {
+  constructor(form) {
+    this.form = form;
+    this.dirtyInputs = [];
+    this.isDisabled = true;
+
+    this.init();
+  }
+
+  init() {
+    this.inputs = this.form.querySelectorAll('input, textarea, select');
+    this.submits = this.form.querySelectorAll('input[type=submit], button[type=submit]');
+
+    this.inputs.forEach(DirtySubmitForm.initInput);
+    this.toggleSubmission();
+
+    this.registerListeners();
+  }
+
+  registerListeners() {
+    const throttledUpdateDirtyInput = _.throttle(
+      event => this.updateDirtyInput(event),
+      DirtySubmitForm.THROTTLE_DURATION,
+    );
+    this.form.addEventListener('input', throttledUpdateDirtyInput);
+    this.form.addEventListener('submit', event => this.formSubmit(event));
+  }
+
+  updateDirtyInput(event) {
+    const input = event.target;
+
+    if (!input.dataset.dirtySubmitOriginalValue) return;
+
+    this.updateDirtyInputs(input);
+    this.toggleSubmission();
+  }
+
+  updateDirtyInputs(input) {
+    const { name } = input;
+    const isDirty =
+      input.dataset.dirtySubmitOriginalValue !== DirtySubmitForm.inputCurrentValue(input);
+    const indexOfInputName = this.dirtyInputs.indexOf(name);
+    const isExisting = indexOfInputName !== -1;
+
+    if (isDirty && !isExisting) this.dirtyInputs.push(name);
+    if (!isDirty && isExisting) this.dirtyInputs.splice(indexOfInputName, 1);
+  }
+
+  toggleSubmission() {
+    this.isDisabled = this.dirtyInputs.length === 0;
+    this.submits.forEach(element => {
+      element.disabled = this.isDisabled;
+    });
+  }
+
+  formSubmit(event) {
+    if (this.isDisabled) {
+      event.preventDefault();
+      event.stopImmediatePropagation();
+    }
+
+    return !this.isDisabled;
+  }
+
+  static initInput(element) {
+    element.dataset.dirtySubmitOriginalValue = DirtySubmitForm.inputCurrentValue(element);
+  }
+
+  static isInputCheckable(input) {
+    return input.type === 'checkbox' || input.type === 'radio';
+  }
+
+  static inputCurrentValue(input) {
+    return DirtySubmitForm.isInputCheckable(input) ? input.checked.toString() : input.value;
+  }
+}
+
+DirtySubmitForm.THROTTLE_DURATION = 500;
+
+export default DirtySubmitForm;