1 files changed, 128 insertions, 0 deletions
diff --git a/web_src/js/features/common-fetch-action.js b/web_src/js/features/common-fetch-action.js
new file mode 100644
index 0000000000..ddf1ec2e79
--- /dev/null
+++ b/web_src/js/features/common-fetch-action.js
@@ -0,0 +1,128 @@
+import {request} from '../modules/fetch.js';
+import {showErrorToast} from '../modules/toast.js';
+import {submitEventSubmitter} from '../utils/dom.js';
+import {htmlEscape} from 'escape-goat';
+import {confirmModal} from './comp/ConfirmModal.js';
+
+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) {
+  const form = document.createElement('form');
+  const input = document.createElement('input');
+  form.method = 'post';
+  form.action = `${appSubUrl}/-/fetch-redirect`;
+  input.type = 'hidden';
+  input.name = 'redirect';
+  input.value = redirect;
+  form.append(input);
+  document.body.append(form);
+  form.submit();
+}
+
+async function fetchActionDoRequest(actionElem, url, opt) {
+  try {
+    const resp = await request(url, opt);
+    if (resp.status === 200) {
+      let {redirect} = await resp.json();
+      redirect = redirect || actionElem.getAttribute('data-redirect');
+      actionElem.classList.remove('dirty'); // remove the areYouSure check before reloading
+      if (redirect) {
+        fetchActionDoRedirect(redirect);
+      } else {
+        window.location.reload();
+      }
+      return;
+    } else if (resp.status >= 400 && resp.status < 500) {
+      const data = await resp.json();
+      // the code was quite messy, sometimes the backend uses "err", sometimes it uses "error", and even "user_error"
+      // but at the moment, as a new approach, we only use "errorMessage" here, backend can use JSONError() to respond.
+      if (data.errorMessage) {
+        showErrorToast(data.errorMessage, {useHtmlBody: data.renderFormat === 'html'});
+      } else {
+        showErrorToast(`server error: ${resp.status}`);
+      }
+    } else {
+      showErrorToast(`server error: ${resp.status}`);
+    }
+  } catch (e) {
+    if (e.name !== 'AbortError') {
+      console.error('error when doRequest', e);
+      showErrorToast(`${i18n.network_error} ${e}`);
+    }
+  }
+  actionElem.classList.remove('is-loading', 'loading-icon-2px');
+}
+
+async function formFetchAction(e) {
+  if (!e.target.classList.contains('form-fetch-action')) return;
+
+  e.preventDefault();
+  const formEl = e.target;
+  if (formEl.classList.contains('is-loading')) return;
+
+  formEl.classList.add('is-loading');
+  if (formEl.clientHeight < 50) {
+    formEl.classList.add('loading-icon-2px');
+  }
+
+  const formMethod = formEl.getAttribute('method') || 'get';
+  const formActionUrl = formEl.getAttribute('action');
+  const formData = new FormData(formEl);
+  const formSubmitter = submitEventSubmitter(e);
+  const [submitterName, submitterValue] = [formSubmitter?.getAttribute('name'), formSubmitter?.getAttribute('value')];
+  if (submitterName) {
+    formData.append(submitterName, submitterValue || '');
+  }
+
+  let reqUrl = formActionUrl;
+  const reqOpt = {method: formMethod.toUpperCase()};
+  if (formMethod.toLowerCase() === 'get') {
+    const params = new URLSearchParams();
+    for (const [key, value] of formData) {
+      params.append(key, value.toString());
+    }
+    const pos = reqUrl.indexOf('?');
+    if (pos !== -1) {
+      reqUrl = reqUrl.slice(0, pos);
+    }
+    reqUrl += `?${params.toString()}`;
+  } else {
+    reqOpt.body = formData;
+  }
+
+  await fetchActionDoRequest(formEl, reqUrl, reqOpt);
+}
+
+async function linkAction(e) {
+  // 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;
+    await fetchActionDoRequest(el, url, {method: 'POST'});
+    el.disabled = false;
+  };
+
+  const modalConfirmContent = htmlEscape(el.getAttribute('data-modal-confirm') || '');
+  if (!modalConfirmContent) {
+    await doRequest();
+    return;
+  }
+
+  const isRisky = el.classList.contains('red') || el.classList.contains('negative');
+  if (await confirmModal(modalConfirmContent, {confirmButtonColor: isRisky ? 'red' : 'primary'})) {
+    await doRequest();
+  }
+}
+
+export function initGlobalFetchAction() {
+  document.addEventListener('submit', formFetchAction);
+  document.addEventListener('click', linkAction);
+}