1 files changed, 91 insertions, 0 deletions
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/states/commits_header.vue b/app/assets/javascripts/vue_merge_request_widget/components/states/commits_header.vue
new file mode 100644
index 00000000000..a1d3a09cca4
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+++ b/app/assets/javascripts/vue_merge_request_widget/components/states/commits_header.vue
@@ -0,0 +1,91 @@
+<script>
+import { GlButton } from '@gitlab/ui';
+import _ from 'underscore';
+import { __, n__, sprintf, s__ } from '~/locale';
+import Icon from '~/vue_shared/components/icon.vue';
+
+export default {
+  components: {
+    Icon,
+    GlButton,
+  },
+  props: {
+    isSquashEnabled: {
+      type: Boolean,
+      required: true,
+    },
+    commitsCount: {
+      type: Number,
+      required: false,
+      default: 0,
+    },
+    targetBranch: {
+      type: String,
+      required: true,
+    },
+  },
+  data() {
+    return {
+      expanded: false,
+    };
+  },
+  computed: {
+    collapseIcon() {
+      return this.expanded ? 'chevron-down' : 'chevron-right';
+    },
+    commitsCountMessage() {
+      return n__(__('%d commit'), __('%d commits'), this.isSquashEnabled ? 1 : this.commitsCount);
+    },
+    modifyLinkMessage() {
+      return this.isSquashEnabled ? __('Modify commit messages') : __('Modify merge commit');
+    },
+    ariaLabel() {
+      return this.expanded ? __('Collapse') : __('Expand');
+    },
+    message() {
+      return sprintf(
+        s__(
+          'mrWidgetCommitsAdded|%{commitCount} and %{mergeCommitCount} will be added to %{targetBranch}.',
+        ),
+        {
+          commitCount: `<strong class="commits-count-message">${this.commitsCountMessage}</strong>`,
+          mergeCommitCount: `<strong>${s__('mrWidgetCommitsAdded|1 merge commit')}</strong>`,
+          targetBranch: `<span class="label-branch">${_.escape(this.targetBranch)}</span>`,
+        },
+        false,
+      );
+    },
+  },
+  methods: {
+    toggle() {
+      this.expanded = !this.expanded;
+    },
+  },
+};
+</script>
+
+<template>
+  <div>
+    <div
+      class="js-mr-widget-commits-count mr-widget-extension clickable d-flex align-items-center px-3 py-2"
+      @click="toggle()"
+    >
+      <gl-button
+        :aria-label="ariaLabel"
+        variant="blank"
+        class="commit-edit-toggle mr-2"
+        @click.stop="toggle()"
+      >
+        <icon :name="collapseIcon" :size="16" />
+      </gl-button>
+      <span v-if="expanded">{{ __('Collapse') }}</span>
+      <span v-else>
+        <span v-html="message"></span>
+        <gl-button variant="link" class="modify-message-button">
+          {{ modifyLinkMessage }}
+        </gl-button>
+      </span>
+    </div>
+    <div v-show="expanded"><slot></slot></div>
+  </div>
+</template>