Add modal for verifying user account with CC

ee/app/assets/javascripts/billings/components/account_verification_modal.vue

+<script>
+import { GlAlert, GlLoadingIcon, GlModal, GlSprintf } from '@gitlab/ui';
+import { s__, __ } from '~/locale';
+
+const IFRAME_QUERY = 'enable_submit=false&pp=disable';
+// 450 is the mininum required height to get all iframe inputs visible
+const IFRAME_MINIMUM_HEIGHT = 450;
+const i18n = Object.freeze({
+  title: s__('Billings|Verify User Account'),
+  description: s__(`
+Billings|Your user account has been flagged for potential abuse for running a large number of concurrent pipelines.
+To continue to run a large number of concurrent pipelines, you'll need to validate your account with a credit card.
+%{strongStart}GitLab will not charge your credit card, it will only be used for validation.%{strongEnd}`),
+  iframeNotSupported: __('Your browser does not support iFrames'),
+  actions: {
+    primary: {
+      text: s__('Billings|Verify account'),
+    },
+  },
+});
+
+export default {
+  components: {
+    GlAlert,
+    GlLoadingIcon,
+    GlModal,
+    GlSprintf,
+  },
+  props: {
+    iframeUrl: {
+      type: String,
+      required: true,
+    },
+    allowedOrigin: {
+      type: String,
+      required: true,
+    },
+  },
+  data() {
+    return {
+      error: null,
+      isLoading: true,
+    };
+  },
+  computed: {
+    iframeSrc() {
+      return `${this.iframeUrl}?${IFRAME_QUERY}`;
+    },
+    iframeHeight() {
+      return IFRAME_MINIMUM_HEIGHT * window.devicePixelRatio;
+    },
+  },
+  destroyed() {
+    window.removeEventListener('message', this.handleFrameMessages, true);
+  },
+  methods: {
+    submit(e) {
+      e.preventDefault();
+
+      this.error = null;
+      this.isLoading = true;
+
+      this.$refs.zuora.contentWindow.postMessage('submit', this.allowedOrigin);
+    },
+    show() {
+      this.isLoading = true;
+      this.$refs.modal.show();
+    },
+    handleFrameLoaded() {
+      this.isLoading = false;
+      window.addEventListener('message', this.handleFrameMessages, true);
+    },
+    handleFrameMessages(event) {
+      if (!this.isEventAllowedForOrigin(event)) {
+        return;
+      }
+
+      this.error = event.data;
+      this.isLoading = false;
+    },
+    isEventAllowedForOrigin(event) {
+      try {
+        const url = new URL(event.origin);
+
+        return url.origin === this.allowedOrigin;
+      } catch {
+        return false;
+      }
+    },
+  },
+  i18n,
+};
+</script>
+
+<template>
+  <gl-modal
+    ref="modal"
+    modal-id="credit-card-verification-modal"
+    :title="$options.i18n.title"
+    :action-primary="$options.i18n.actions.primary"
+    @primary="submit"
+  >
+    <p>
+      <gl-sprintf :message="$options.i18n.description">
+        <template #strong="{ content }"
+          ><strong>{{ content }}</strong></template
+        >
+      </gl-sprintf>
+    </p>
+
+    <gl-alert v-if="error" variant="danger">{{ error.msg }}</gl-alert>
+    <gl-loading-icon v-if="isLoading" size="lg" />
+    <!-- eslint-disable @gitlab/vue-require-i18n-strings -->
+    <iframe
+      v-show="!isLoading"
+      id="zuora"
+      :src="iframeSrc"
+      style="border: none"
+      width="100%"
+      :height="iframeHeight"
+      @load="handleFrameLoaded"
+    >
+      <p>{{ $options.i18n.iframeNotSupported }}</p>
+    </iframe>
+    <!-- eslint-enable @gitlab/vue-require-i18n-strings -->
+  </gl-modal>
+</template>

ee/spec/frontend/billings/components/account_verification_modal_spec.js

+import { GlLoadingIcon, GlModal, GlSprintf } from '@gitlab/ui';
+import { shallowMount } from '@vue/test-utils';
+import AccountVerificationModal from 'ee/billings/components/account_verification_modal.vue';
+
+describe('Account verification modal', () => {
+  let wrapper;
+
+  const createComponent = () => {
+    return shallowMount(AccountVerificationModal, {
+      propsData: {
+        iframeUrl: 'https://gitlab.com',
+        allowedOrigin: 'https://gitlab.com',
+      },
+      stubs: {
+        GlSprintf,
+      },
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe('on destroying', () => {
+    it('removes message event listener', () => {
+      const removeEventListenerSpy = jest.spyOn(window, 'removeEventListener');
+      wrapper = createComponent();
+
+      wrapper.destroy();
+
+      expect(removeEventListenerSpy).toHaveBeenCalledWith(
+        'message',
+        wrapper.vm.handleFrameMessages,
+        true,
+      );
+    });
+  });
+
+  describe('on creation', () => {
+    beforeEach(() => {
+      wrapper = createComponent();
+    });
+
+    afterEach(() => {
+      wrapper.destroy();
+    });
+
+    it('is in the loading state', () => {
+      expect(wrapper.findComponent(GlLoadingIcon).isVisible()).toBe(true);
+    });
+
+    it('renders the title', () => {
+      expect(wrapper.findComponent(GlModal).attributes('title')).toBe('Verify User Account');
+    });
+
+    it('renders the description', () => {
+      expect(wrapper.find('p').text()).toContain('Your user account has been flagged');
+    });
+  });
+});

locale/gitlab.pot

@@ -5037,6 +5037,15 @@ msgstr ""
 msgid "BillingPlan|Upgrade for free"
 msgstr ""
 
+msgid "Billings|Verify User Account"
+msgstr ""
+
+msgid "Billings|Verify account"
+msgstr ""
+
+msgid "Billings|Your user account has been flagged for potential abuse for running a large number of concurrent pipelines. To continue to run a large number of concurrent pipelines, you'll need to validate your account with a credit card. %{strongStart}GitLab will not charge your credit card, it will only be used for validation.%{strongEnd}"
+msgstr ""
+
 msgid "Billing|An email address is only visible for users with public emails."
 msgstr ""
 
@@ -37193,6 +37202,9 @@ msgstr ""
 msgid "Your authorized applications"
 msgstr ""
 
+msgid "Your browser does not support iFrames"
+msgstr ""
+
 msgid "Your browser doesn't support U2F. Please use Google Chrome desktop (version 41 or newer)."
 msgstr ""