Refactor some frontend problems (#32646)

1. correct the modal usage on "admin email list" page (then
`web_src/js/features/admin/emails.ts` is removed)
2. use `addDelegatedEventListener` instead of `jQuery().on`
3. more jQuery related changes and remove jQuery from
`web_src/js/features/common-button.ts`
4. improve `confirmModal` to make it support header, and remove
incorrect double-escaping
5. fix more typescript related types
6. fine tune devtest pages and add more tests

7 files changed, 106 insertions, 116 deletions

diff --git a/web_src/js/features/admin/emails.ts b/web_src/js/features/admin/emails.ts
deleted file mode 100644
index 8e97b67bf9..0000000000
--- a/web_src/js/features/admin/emails.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-import $ from 'jquery';
-
-export function initAdminEmails(): void {
-  $('.link-email-action').on('click', (e) => {
-    const $this = $(this);
-    $('#form-uid').val($this.data('uid'));
-    $('#form-email').val($this.data('email'));
-    $('#form-primary').val($this.data('primary'));
-    $('#form-activate').val($this.data('activate'));
-    $('#change-email-modal').modal('show');
-    e.preventDefault();
-  });
-}
diff --git a/web_src/js/features/common-button.ts b/web_src/js/features/common-button.ts
index 4aca5ef8f5..acce992b90 100644
--- a/web_src/js/features/common-button.ts
+++ b/web_src/js/features/common-button.ts
@@ -1,13 +1,13 @@
-import $ from 'jquery';
 import {POST} from '../modules/fetch.ts';
-import {hideElem, showElem, toggleElem} from '../utils/dom.ts';
-import {showErrorToast} from '../modules/toast.ts';
+import {addDelegatedEventListener, hideElem, queryElems, showElem, toggleElem} from '../utils/dom.ts';
+import {fomanticQuery} from '../modules/fomantic/base.ts';
+import {camelize} from 'vue';
 
 export function initGlobalButtonClickOnEnter(): void {
-  $(document).on('keypress', 'div.ui.button,span.ui.button', (e) => {
-    if (e.code === ' ' || e.code === 'Enter') {
-      $(e.target).trigger('click');
+  addDelegatedEventListener(document, 'keypress', 'div.ui.button, span.ui.button', (el, e: KeyboardEvent) => {
+    if (e.code === 'Space' || e.code === 'Enter') {
       e.preventDefault();
+      el.click();
     }
   });
 }
@@ -40,7 +40,7 @@ export function initGlobalDeleteButton(): void {
         }
       }
 
-      $(modal).modal({
+      fomanticQuery(modal).modal({
         closable: false,
         onApprove: async () => {
           // if `data-type="form"` exists, then submit the form by the selector provided by `data-form="..."`
@@ -73,87 +73,93 @@ export function initGlobalDeleteButton(): void {
   }
 }
 
-export function initGlobalButtons(): void {
-  // There are many "cancel button" elements in modal dialogs, Fomantic UI expects they are button-like elements but never submit a form.
-  // However, Gitea misuses the modal dialog and put the cancel buttons inside forms, so we must prevent the form submission.
-  // There are a few cancel buttons in non-modal forms, and there are some dynamically created forms (eg: the "Edit Issue Content")
-  $(document).on('click', 'form button.ui.cancel.button', (e) => {
-    e.preventDefault();
-  });
-
-  $('.show-panel').on('click', function (e) {
-    // a '.show-panel' element can show a panel, by `data-panel="selector"`
-    // if it has "toggle" class, it toggles the panel
-    e.preventDefault();
-    const sel = this.getAttribute('data-panel');
-    if (this.classList.contains('toggle')) {
-      toggleElem(sel);
-    } else {
-      showElem(sel);
-    }
-  });
+function onShowPanelClick(e) {
+  // a '.show-panel' element can show a panel, by `data-panel="selector"`
+  // if it has "toggle" class, it toggles the panel
+  const el = e.currentTarget;
+  e.preventDefault();
+  const sel = el.getAttribute('data-panel');
+  if (el.classList.contains('toggle')) {
+    toggleElem(sel);
+  } else {
+    showElem(sel);
+  }
+}
 
-  $('.hide-panel').on('click', function (e) {
-    // a `.hide-panel` element can hide a panel, by `data-panel="selector"` or `data-panel-closest="selector"`
-    e.preventDefault();
-    let sel = this.getAttribute('data-panel');
-    if (sel) {
-      hideElem($(sel));
-      return;
-    }
-    sel = this.getAttribute('data-panel-closest');
-    if (sel) {
-      hideElem($(this).closest(sel));
-      return;
-    }
-    // should never happen, otherwise there is a bug in code
-    showErrorToast('Nothing to hide');
-  });
+function onHidePanelClick(e) {
+  // a `.hide-panel` element can hide a panel, by `data-panel="selector"` or `data-panel-closest="selector"`
+  const el = e.currentTarget;
+  e.preventDefault();
+  let sel = el.getAttribute('data-panel');
+  if (sel) {
+    hideElem(sel);
+    return;
+  }
+  sel = el.getAttribute('data-panel-closest');
+  if (sel) {
+    hideElem(el.parentNode.closest(sel));
+    return;
+  }
+  throw new Error('no panel to hide'); // should never happen, otherwise there is a bug in code
 }
 
-export function initGlobalShowModal() {
+function onShowModalClick(e) {
   // A ".show-modal" button will show a modal dialog defined by its "data-modal" attribute.
   // Each "data-modal-{target}" attribute will be filled to target element's value or text-content.
   // * First, try to query '#target'
+  // * Then, try to query '[name=target]'
   // * Then, try to query '.target'
   // * Then, try to query 'target' as HTML tag
   // If there is a ".{attr}" part like "data-modal-form.action", then the form's "action" attribute will be set.
-  $('.show-modal').on('click', function (e) {
-    e.preventDefault();
-    const modalSelector = this.getAttribute('data-modal');
-    const $modal = $(modalSelector);
-    if (!$modal.length) {
-      throw new Error('no modal for this action');
+  const el = e.currentTarget;
+  e.preventDefault();
+  const modalSelector = el.getAttribute('data-modal');
+  const elModal = document.querySelector(modalSelector);
+  if (!elModal) throw new Error('no modal for this action');
+
+  const modalAttrPrefix = 'data-modal-';
+  for (const attrib of el.attributes) {
+    if (!attrib.name.startsWith(modalAttrPrefix)) {
+      continue;
     }
-    const modalAttrPrefix = 'data-modal-';
-    for (const attrib of this.attributes) {
-      if (!attrib.name.startsWith(modalAttrPrefix)) {
-        continue;
-      }
 
-      const attrTargetCombo = attrib.name.substring(modalAttrPrefix.length);
-      const [attrTargetName, attrTargetAttr] = attrTargetCombo.split('.');
-      // try to find target by: "#target" -> ".target" -> "target tag"
-      let $attrTarget = $modal.find(`#${attrTargetName}`);
-      if (!$attrTarget.length) $attrTarget = $modal.find(`.${attrTargetName}`);
-      if (!$attrTarget.length) $attrTarget = $modal.find(`${attrTargetName}`);
-      if (!$attrTarget.length) continue; // TODO: show errors in dev mode to remind developers that there is a bug
-
-      if (attrTargetAttr) {
-        $attrTarget[0][attrTargetAttr] = attrib.value;
-      } else if ($attrTarget[0].matches('input, textarea')) {
-        $attrTarget.val(attrib.value); // FIXME: add more supports like checkbox
-      } else {
-        $attrTarget[0].textContent = attrib.value; // FIXME: it should be more strict here, only handle div/span/p
-      }
+    const attrTargetCombo = attrib.name.substring(modalAttrPrefix.length);
+    const [attrTargetName, attrTargetAttr] = attrTargetCombo.split('.');
+    // try to find target by: "#target" -> "[name=target]" -> ".target" -> "<target> tag"
+    const attrTarget = elModal.querySelector(`#${attrTargetName}`) ||
+      elModal.querySelector(`[name=${attrTargetName}]`) ||
+      elModal.querySelector(`.${attrTargetName}`) ||
+      elModal.querySelector(`${attrTargetName}`);
+    if (!attrTarget) {
+      if (!window.config.runModeIsProd) throw new Error(`attr target "${attrTargetCombo}" not found for modal`);
+      continue;
     }
 
-    $modal.modal('setting', {
-      onApprove: () => {
-        // "form-fetch-action" can handle network errors gracefully,
-        // so keep the modal dialog to make users can re-submit the form if anything wrong happens.
-        if ($modal.find('.form-fetch-action').length) return false;
-      },
-    }).modal('show');
-  });
+    if (attrTargetAttr) {
+      attrTarget[camelize(attrTargetAttr)] = attrib.value;
+    } else if (attrTarget.matches('input, textarea')) {
+      attrTarget.value = attrib.value; // FIXME: add more supports like checkbox
+    } else {
+      attrTarget.textContent = attrib.value; // FIXME: it should be more strict here, only handle div/span/p
+    }
+  }
+
+  fomanticQuery(elModal).modal('setting', {
+    onApprove: () => {
+      // "form-fetch-action" can handle network errors gracefully,
+      // so keep the modal dialog to make users can re-submit the form if anything wrong happens.
+      if (elModal.querySelector('.form-fetch-action')) return false;
+    },
+  }).modal('show');
+}
+
+export function initGlobalButtons(): void {
+  // There are many "cancel button" elements in modal dialogs, Fomantic UI expects they are button-like elements but never submit a form.
+  // However, Gitea misuses the modal dialog and put the cancel buttons inside forms, so we must prevent the form submission.
+  // There are a few cancel buttons in non-modal forms, and there are some dynamically created forms (eg: the "Edit Issue Content")
+  addDelegatedEventListener(document, 'click', 'form button.ui.cancel.button', (_ /* el */, e) => e.preventDefault());
+
+  queryElems(document, '.show-panel', (el) => el.addEventListener('click', onShowPanelClick));
+  queryElems(document, '.hide-panel', (el) => el.addEventListener('click', onHidePanelClick));
+  queryElems(document, '.show-modal', (el) => el.addEventListener('click', onShowModalClick));
 }
diff --git a/web_src/js/features/common-fetch-action.ts b/web_src/js/features/common-fetch-action.ts
index 76973d8ce7..0caa27c0e2 100644
--- a/web_src/js/features/common-fetch-action.ts
+++ b/web_src/js/features/common-fetch-action.ts
@@ -1,14 +1,14 @@
 import {request} from '../modules/fetch.ts';
 import {showErrorToast} from '../modules/toast.ts';
-import {submitEventSubmitter} from '../utils/dom.ts';
-import {htmlEscape} from 'escape-goat';
+import {addDelegatedEventListener, submitEventSubmitter} from '../utils/dom.ts';
 import {confirmModal} from './comp/ConfirmModal.ts';
+import type {RequestOpts} from '../types.ts';
 
 const {appSubUrl, i18n} = window.config;
 
 // fetchActionDoRedirect does real redirection to bypass the browser's limitations of "location"
 // more details are in the backend's fetch-redirect handler
-function fetchActionDoRedirect(redirect) {
+function fetchActionDoRedirect(redirect: string) {
   const form = document.createElement('form');
   const input = document.createElement('input');
   form.method = 'post';
@@ -21,7 +21,7 @@ function fetchActionDoRedirect(redirect) {
   form.submit();
 }
 
-async function fetchActionDoRequest(actionElem, url, opt) {
+async function fetchActionDoRequest(actionElem: HTMLElement, url: string, opt: RequestOpts) {
   try {
     const resp = await request(url, opt);
     if (resp.status === 200) {
@@ -55,11 +55,8 @@ async function fetchActionDoRequest(actionElem, url, opt) {
   actionElem.classList.remove('is-loading', 'loading-icon-2px');
 }
 
-async function formFetchAction(e) {
-  if (!e.target.classList.contains('form-fetch-action')) return;
-
+async function formFetchAction(formEl: HTMLFormElement, e: SubmitEvent) {
   e.preventDefault();
-  const formEl = e.target;
   if (formEl.classList.contains('is-loading')) return;
 
   formEl.classList.add('is-loading');
@@ -77,7 +74,7 @@ async function formFetchAction(e) {
   }
 
   let reqUrl = formActionUrl;
-  const reqOpt = {method: formMethod.toUpperCase()};
+  const reqOpt = {method: formMethod.toUpperCase(), body: null};
   if (formMethod.toLowerCase() === 'get') {
     const params = new URLSearchParams();
     for (const [key, value] of formData) {
@@ -95,34 +92,36 @@ async function formFetchAction(e) {
   await fetchActionDoRequest(formEl, reqUrl, reqOpt);
 }
 
-async function linkAction(e) {
+async function linkAction(el: HTMLElement, e: Event) {
   // A "link-action" can post AJAX request to its "data-url"
   // Then the browser is redirected to: the "redirect" in response, or "data-redirect" attribute, or current URL by reloading.
   // If the "link-action" has "data-modal-confirm" attribute, a confirm modal dialog will be shown before taking action.
-  const el = e.target.closest('.link-action');
-  if (!el) return;
-
   e.preventDefault();
   const url = el.getAttribute('data-url');
   const doRequest = async () => {
-    el.disabled = true;
+    if ('disabled' in el) el.disabled = true; // el could be A or BUTTON, but A doesn't have disabled attribute
     await fetchActionDoRequest(el, url, {method: 'POST'});
-    el.disabled = false;
+    if ('disabled' in el) el.disabled = false;
   };
 
-  const modalConfirmContent = htmlEscape(el.getAttribute('data-modal-confirm') || '');
+  const modalConfirmContent = el.getAttribute('data-modal-confirm') ||
+    el.getAttribute('data-modal-confirm-content') || '';
   if (!modalConfirmContent) {
     await doRequest();
     return;
   }
 
   const isRisky = el.classList.contains('red') || el.classList.contains('negative');
-  if (await confirmModal(modalConfirmContent, {confirmButtonColor: isRisky ? 'red' : 'primary'})) {
+  if (await confirmModal({
+    header: el.getAttribute('data-modal-confirm-header') || '',
+    content: modalConfirmContent,
+    confirmButtonColor: isRisky ? 'red' : 'primary',
+  })) {
     await doRequest();
   }
 }
 
 export function initGlobalFetchAction() {
-  document.addEventListener('submit', formFetchAction);
-  document.addEventListener('click', linkAction);
+  addDelegatedEventListener(document, 'click', '.form-fetch-action', formFetchAction);
+  addDelegatedEventListener(document, 'click', '.link-action', linkAction);
 }
diff --git a/web_src/js/features/comp/ConfirmModal.ts b/web_src/js/features/comp/ConfirmModal.ts
index 93459ae1a0..bf645cdbdb 100644
--- a/web_src/js/features/comp/ConfirmModal.ts
+++ b/web_src/js/features/comp/ConfirmModal.ts
@@ -5,10 +5,12 @@ import {fomanticQuery} from '../../modules/fomantic/base.ts';
 
 const {i18n} = window.config;
 
-export function confirmModal(content, {confirmButtonColor = 'primary'} = {}) {
+export function confirmModal({header = '', content = '', confirmButtonColor = 'primary'} = {}) {
   return new Promise((resolve) => {
+    const headerHtml = header ? `<div class="header">${htmlEscape(header)}</div>` : '';
     const modal = createElementFromHTML(`
       <div class="ui g-modal-confirm modal">
+        ${headerHtml}
         <div class="content">${htmlEscape(content)}</div>
         <div class="actions">
           <button class="ui cancel button">${svg('octicon-x')} ${htmlEscape(i18n.modal_cancel)}</button>
diff --git a/web_src/js/features/repo-issue-list.ts b/web_src/js/features/repo-issue-list.ts
index caf517c5e0..931122db3c 100644
--- a/web_src/js/features/repo-issue-list.ts
+++ b/web_src/js/features/repo-issue-list.ts
@@ -76,7 +76,7 @@ function initRepoIssueListCheckboxes() {
     // for delete
     if (action === 'delete') {
       const confirmText = e.target.getAttribute('data-action-delete-confirm');
-      if (!await confirmModal(confirmText, {confirmButtonColor: 'red'})) {
+      if (!await confirmModal({content: confirmText, confirmButtonColor: 'red'})) {
         return;
       }
     }
diff --git a/web_src/js/index.ts b/web_src/js/index.ts
index eeead37333..90e2d29225 100644
--- a/web_src/js/index.ts
+++ b/web_src/js/index.ts
@@ -34,7 +34,6 @@ import {
 } from './features/repo-issue.ts';
 import {initRepoEllipsisButton, initCommitStatuses} from './features/repo-commit.ts';
 import {initRepoTopicBar} from './features/repo-home.ts';
-import {initAdminEmails} from './features/admin/emails.ts';
 import {initAdminCommon} from './features/admin/common.ts';
 import {initRepoTemplateSearch} from './features/repo-template.ts';
 import {initRepoCodeView} from './features/repo-code.ts';
@@ -83,7 +82,6 @@ import {
   initGlobalButtonClickOnEnter,
   initGlobalButtons,
   initGlobalDeleteButton,
-  initGlobalShowModal,
 } from './features/common-button.ts';
 import {initGlobalEnterQuickSubmit, initGlobalFormDirtyLeaveConfirm} from './features/common-form.ts';
 
@@ -122,7 +120,6 @@ onDomReady(() => {
   callInitFunctions([
     initGlobalDropdown,
     initGlobalTabularMenu,
-    initGlobalShowModal,
     initGlobalFetchAction,
     initGlobalTooltips,
     initGlobalButtonClickOnEnter,
@@ -157,7 +154,6 @@ onDomReady(() => {
     initCopyContent,
 
     initAdminCommon,
-    initAdminEmails,
     initAdminUserListSearchForm,
     initAdminConfigs,
     initAdminSelfCheck,
diff --git a/web_src/js/utils/dom.ts b/web_src/js/utils/dom.ts
index da9ce71644..06c5e8b486 100644
--- a/web_src/js/utils/dom.ts
+++ b/web_src/js/utils/dom.ts
@@ -353,7 +353,7 @@ export function querySingleVisibleElem<T extends HTMLElement>(parent: Element, s
   return candidates.length ? candidates[0] as T : null;
 }
 
-export function addDelegatedEventListener<T extends HTMLElement>(parent: Node, type: string, selector: string, listener: (elem: T, e: Event) => void | Promise<any>, options?: boolean | AddEventListenerOptions) {
+export function addDelegatedEventListener<T extends HTMLElement, E extends Event>(parent: Node, type: string, selector: string, listener: (elem: T, e: E) => void | Promise<any>, options?: boolean | AddEventListenerOptions) {
   parent.addEventListener(type, (e: Event) => {
     const elem = (e.target as HTMLElement).closest(selector);
     if (!elem) return;