Resolve "Issue board card design"

11 files changed, 404 insertions, 160 deletions

diff --git a/app/assets/javascripts/boards/components/issue_card_inner.vue b/app/assets/javascripts/boards/components/issue_card_inner.vue
index d956777a86b..2315a48a306 100644
--- a/app/assets/javascripts/boards/components/issue_card_inner.vue
+++ b/app/assets/javascripts/boards/components/issue_card_inner.vue
@@ -1,18 +1,24 @@
 <script>
-import $ from 'jquery';
+import { GlTooltipDirective } from '@gitlab-org/gitlab-ui';
+import { sprintf, __ } from '~/locale';
 import Icon from '~/vue_shared/components/icon.vue';
+import TooltipOnTruncate from '~/vue_shared/components/tooltip_on_truncate.vue';
 import UserAvatarLink from '../../vue_shared/components/user_avatar/user_avatar_link.vue';
 import eventHub from '../eventhub';
-import tooltip from '../../vue_shared/directives/tooltip';
+import IssueDueDate from './issue_due_date.vue';
+import IssueTimeEstimate from './issue_time_estimate.vue';
 import boardsStore from '../stores/boards_store';
 
 export default {
   components: {
-    UserAvatarLink,
     Icon,
+    UserAvatarLink,
+    TooltipOnTruncate,
+    IssueDueDate,
+    IssueTimeEstimate,
   },
   directives: {
-    tooltip,
+    GlTooltip: GlTooltipDirective,
   },
   props: {
     issue: {
@@ -45,8 +51,8 @@ export default {
   },
   data() {
     return {
-      limitBeforeCounter: 3,
-      maxRender: 4,
+      limitBeforeCounter: 2,
+      maxRender: 3,
       maxCounter: 99,
     };
   },
@@ -55,7 +61,9 @@ export default {
       return this.issue.assignees.length - this.limitBeforeCounter;
     },
     assigneeCounterTooltip() {
-      return `${this.assigneeCounterLabel} more`;
+      const { numberOverLimit, maxCounter } = this;
+      const count = numberOverLimit > maxCounter ? maxCounter : numberOverLimit;
+      return sprintf(__('%{count} more assignees'), { count });
     },
     assigneeCounterLabel() {
       if (this.numberOverLimit > this.maxCounter) {
@@ -80,6 +88,10 @@ export default {
     showLabelFooter() {
       return this.issue.labels.find(l => this.showLabel(l)) !== undefined;
     },
+    issueReferencePath() {
+      const { referencePath, groupId } = this.issue;
+      return !groupId ? referencePath.split('#')[0] : null;
+    },
   },
   methods: {
     isIndexLessThanlimit(index) {
@@ -96,11 +108,9 @@ export default {
       return index < this.limitBeforeCounter;
     },
     assigneeUrl(assignee) {
+      if (!assignee) return '';
       return `${this.rootPath}${assignee.username}`;
     },
-    assigneeUrlTitle(assignee) {
-      return `Assigned to ${assignee.name}`;
-    },
     avatarUrlTitle(assignee) {
       return `Avatar for ${assignee.name}`;
     },
@@ -108,19 +118,29 @@ export default {
       if (!label.id) return false;
       return true;
     },
-    filterByLabel(label, e) {
+    filterByLabel(label) {
+      if (!this.updateFilters) return;
+      const labelTitle = encodeURIComponent(label.title);
+      const filter = `label_name[]=${labelTitle}`;
+
+      this.applyFilter(filter);
+    },
+    filterByWeight(weight) {
       if (!this.updateFilters) return;
 
+      const issueWeight = encodeURIComponent(weight);
+      const filter = `weight=${issueWeight}`;
+
+      this.applyFilter(filter);
+    },
+    applyFilter(filter) {
       const filterPath = boardsStore.filter.path.split('&');
-      const labelTitle = encodeURIComponent(label.title);
-      const param = `label_name[]=${labelTitle}`;
-      const labelIndex = filterPath.indexOf(param);
-      $(e.currentTarget).tooltip('hide');
+      const filterIndex = filterPath.indexOf(filter);
 
-      if (labelIndex === -1) {
-        filterPath.push(param);
+      if (filterIndex === -1) {
+        filterPath.push(filter);
       } else {
-        filterPath.splice(labelIndex, 1);
+        filterPath.splice(filterIndex, 1);
       }
 
       boardsStore.filter.path = filterPath.join('&');
@@ -141,24 +161,62 @@ export default {
 <template>
   <div>
     <div class="board-card-header">
-      <h4 class="board-card-title">
+      <h4 class="board-card-title append-bottom-0 prepend-top-0">
         <icon
           v-if="issue.confidential"
+          v-gl-tooltip
           name="eye-slash"
-          class="confidential-icon"
-        />
-        <a
+          :title="__('Confidential')"
+          class="confidential-icon append-right-4"
+          :aria-label="__('Confidential')"
+        /><a
           :href="issue.path"
           :title="issue.title"
           class="js-no-trigger"
           @mousemove.stop>{{ issue.title }}</a>
+      </h4>
+    </div>
+    <div
+      v-if="showLabelFooter"
+      class="board-card-labels prepend-top-4 d-flex flex-wrap"
+    >
+      <button
+        v-for="label in issue.labels"
+        v-if="showLabel(label)"
+        :key="label.id"
+        v-gl-tooltip
+        :style="labelStyle(label)"
+        :title="label.description"
+        class="badge color-label append-right-4 prepend-top-4"
+        type="button"
+        @click="filterByLabel(label)"
+      >
+        {{ label.title }}
+      </button>
+    </div>
+    <div class="board-card-footer d-flex justify-content-between align-items-end">
+      <div class="d-flex align-items-start flex-wrap-reverse board-card-number-container js-board-card-number-container">
         <span
-          v-if="issueId"
-          class="board-card-number append-right-5"
+          v-if="issue.referencePath"
+          class="board-card-number d-flex append-right-8 prepend-top-8"
         >
-          {{ issue.referencePath }}
+          <tooltip-on-truncate
+            v-if="issueReferencePath"
+            :title="issueReferencePath"
+            placement="bottom"
+            class="board-issue-path block-truncated bold"
+          >{{ issueReferencePath }}</tooltip-on-truncate>#{{ issue.iid }}
         </span>
-      </h4>
+        <span class="board-info-items prepend-top-8 d-inline-block">
+          <issue-due-date
+            v-if="issue.dueDate"
+            :date="issue.dueDate"
+          /><issue-time-estimate
+            v-if="issue.timeEstimate"
+            :estimate="issue.timeEstimate"
+          />
+        </span>
+      </div>
       <div class="board-card-assignee">
         <user-avatar-link
           v-for="(assignee, index) in issue.assignees"
@@ -167,38 +225,26 @@ export default {
           :link-href="assigneeUrl(assignee)"
           :img-alt="avatarUrlTitle(assignee)"
           :img-src="assignee.avatar"
-          :tooltip-text="assigneeUrlTitle(assignee)"
+          :img-size="24"
           class="js-no-trigger"
           tooltip-placement="bottom"
-        />
+        >
+          <span class="js-assignee-tooltip">
+            <span class="bold d-block">Assignee</span>
+            {{ assignee.name }} 
+            <span class="text-white-50">@{{ assignee.username }}</span>
+          </span>
+        </user-avatar-link>
         <span
           v-if="shouldRenderCounter"
-          v-tooltip
+          v-gl-tooltip
           :title="assigneeCounterTooltip"
           class="avatar-counter"
+          data-placement="bottom"
         >
           {{ assigneeCounterLabel }}
         </span>
       </div>
     </div>
-    <div
-      v-if="showLabelFooter"
-      class="board-card-footer"
-    >
-      <button
-        v-for="label in issue.labels"
-        v-if="showLabel(label)"
-        :key="label.id"
-        v-tooltip
-        :style="labelStyle(label)"
-        :title="label.description"
-        class="badge color-label"
-        type="button"
-        data-container="body"
-        @click="filterByLabel(label, $event)"
-      >
-        {{ label.title }}
-      </button>
-    </div>
   </div>
 </template>
diff --git a/app/assets/javascripts/boards/components/issue_due_date.vue b/app/assets/javascripts/boards/components/issue_due_date.vue
new file mode 100644
index 00000000000..025ef7e9743
--- /dev/null
+++ b/app/assets/javascripts/boards/components/issue_due_date.vue
@@ -0,0 +1,90 @@
+<script>
+import dateFormat from 'dateformat';
+import { GlTooltip } from '@gitlab-org/gitlab-ui';
+import Icon from '~/vue_shared/components/icon.vue';
+import { __ } from '~/locale';
+import { getDayDifference, getTimeago, dateInWords } from '~/lib/utils/datetime_utility';
+
+export default {
+  components: {
+    Icon,
+    GlTooltip,
+  },
+  props: {
+    date: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    title() {
+      const timeago = getTimeago();
+      const { timeDifference, standardDateFormat } = this;
+      const formatedDate = standardDateFormat;
+
+      if (timeDifference >= -1 && timeDifference < 7) {
+        return `${timeago.format(this.issueDueDate)} (${formatedDate})`;
+      }
+
+      return timeago.format(this.issueDueDate);
+    },
+    body() {
+      const { timeDifference, issueDueDate, standardDateFormat } = this;
+
+      if (timeDifference === 0) {
+        return __('Today');
+      } else if (timeDifference === 1) {
+        return __('Tomorrow');
+      } else if (timeDifference === -1) {
+        return __('Yesterday');
+      } else if (timeDifference > 0 && timeDifference < 7) {
+        return dateFormat(issueDueDate, 'dddd', true);
+      }
+
+      return standardDateFormat;
+    },
+    issueDueDate() {
+      return new Date(this.date);
+    },
+    timeDifference() {
+      const today = new Date();
+      return getDayDifference(today, this.issueDueDate);
+    },
+    isPastDue() {
+      if (this.timeDifference >= 0) return false;
+      return true;
+    },
+    standardDateFormat() {
+      const today = new Date();
+      const isDueInCurrentYear = today.getFullYear() === this.issueDueDate.getFullYear();
+
+      return dateInWords(this.issueDueDate, true, isDueInCurrentYear);
+    },
+  },
+};
+</script>
+
+<template>
+  <span>
+    <span
+      ref="issueDueDate"
+      class="board-card-info card-number"
+    >
+      <icon
+        :class="{'text-danger': isPastDue, 'board-card-info-icon': true}"
+        name="calendar"
+      /><time
+        :class="{'text-danger': isPastDue}"
+        datetime="date"
+        class="board-card-info-text">{{ body }}</time>
+    </span>
+    <gl-tooltip
+      :target="() => $refs.issueDueDate"
+      placement="bottom"
+    >
+      <span class="bold">{{ __('Due date') }}</span>
+      <br />
+      <span :class="{'text-danger-muted': isPastDue}">{{ title }}</span>
+    </gl-tooltip>
+  </span>
+</template>
diff --git a/app/assets/javascripts/boards/components/issue_time_estimate.vue b/app/assets/javascripts/boards/components/issue_time_estimate.vue
new file mode 100644
index 00000000000..efc7daf7812
--- /dev/null
+++ b/app/assets/javascripts/boards/components/issue_time_estimate.vue
@@ -0,0 +1,48 @@
+<script>
+import { GlTooltip } from '@gitlab-org/gitlab-ui';
+import Icon from '~/vue_shared/components/icon.vue';
+import { parseSeconds, stringifyTime } from '~/lib/utils/datetime_utility';
+
+export default {
+  components: {
+    Icon,
+    GlTooltip,
+  },
+  props: {
+    estimate: {
+      type: Number,
+      required: true,
+    },
+  },
+  computed: {
+    title() {
+      return stringifyTime(parseSeconds(this.estimate), true);
+    },
+    timeEstimate() {
+      return stringifyTime(parseSeconds(this.estimate));
+    },
+  },
+};
+</script>
+
+<template>
+  <span>
+    <span
+      ref="issueTimeEstimate"
+      class="board-card-info card-number"
+    >
+      <icon
+        name="hourglass"
+        css-classes="board-card-info-icon"
+      /><time class="board-card-info-text">{{ timeEstimate }}</time>
+    </span>
+    <gl-tooltip
+      :target="() => $refs.issueTimeEstimate"
+      placement="bottom"
+      class="js-issue-time-estimate"
+    >
+      <span class="bold d-block">{{ __('Time estimate') }}</span>
+      {{ title }}
+    </gl-tooltip>
+  </span>
+</template>
diff --git a/app/assets/javascripts/boards/models/issue.js b/app/assets/javascripts/boards/models/issue.js
index 669630edcab..5e0f0b07247 100644
--- a/app/assets/javascripts/boards/models/issue.js
+++ b/app/assets/javascripts/boards/models/issue.js
@@ -30,6 +30,7 @@ class ListIssue {
     this.toggleSubscriptionEndpoint = obj.toggle_subscription_endpoint;
     this.milestone_id = obj.milestone_id;
     this.project_id = obj.project_id;
+    this.timeEstimate = obj.time_estimate;
     this.assignableLabelsEndpoint = obj.assignable_labels_endpoint;
 
     if (obj.project) {
diff --git a/app/assets/javascripts/lib/utils/datetime_utility.js b/app/assets/javascripts/lib/utils/datetime_utility.js
index 46740308f17..e69e56c85be 100644
--- a/app/assets/javascripts/lib/utils/datetime_utility.js
+++ b/app/assets/javascripts/lib/utils/datetime_utility.js
@@ -454,12 +454,20 @@ export const parseSeconds = (seconds, { daysPerWeek = 5, hoursPerDay = 8 } = {})
 /**
  * Accepts a timeObject (see parseSeconds) and returns a condensed string representation of it
  * (e.g. '1w 2d 3h 1m' or '1h 30m'). Zero value units are not included.
+ * If the 'fullNameFormat' param is passed it returns a non condensed string eg '1 week 3 days'
  */
-export const stringifyTime = timeObject => {
+export const stringifyTime = (timeObject, fullNameFormat = false) => {
   const reducedTime = _.reduce(
     timeObject,
     (memo, unitValue, unitName) => {
       const isNonZero = !!unitValue;
+
+      if (fullNameFormat && isNonZero) {
+        // Remove traling 's' if unit value is singular
+        const formatedUnitName = unitValue > 1 ? unitName : unitName.replace(/s$/, '');
+        return `${memo} ${unitValue} ${formatedUnitName}`;
+      }
+
       return isNonZero ? `${memo} ${unitValue}${unitName.charAt(0)}` : memo;
     },
     '',
diff --git a/app/assets/javascripts/vue_shared/components/user_avatar/user_avatar_image.vue b/app/assets/javascripts/vue_shared/components/user_avatar/user_avatar_image.vue
index 7737b9f2697..4cfb1ded0a9 100644
--- a/app/assets/javascripts/vue_shared/components/user_avatar/user_avatar_image.vue
+++ b/app/assets/javascripts/vue_shared/components/user_avatar/user_avatar_image.vue
@@ -15,14 +15,14 @@
 
 */
 
+import { GlTooltip } from '@gitlab-org/gitlab-ui';
 import defaultAvatarUrl from 'images/no_avatar.png';
 import { placeholderImage } from '../../../lazy_loader';
-import tooltip from '../../directives/tooltip';
 
 export default {
   name: 'UserAvatarImage',
-  directives: {
-    tooltip,
+  components: {
+    GlTooltip,
   },
   props: {
     lazy: {
@@ -73,9 +73,6 @@ export default {
     resultantSrcAttribute() {
       return this.lazy ? placeholderImage : this.sanitizedSource;
     },
-    tooltipContainer() {
-      return this.tooltipText ? 'body' : null;
-    },
     avatarSizeClass() {
       return `s${this.size}`;
     },
@@ -84,22 +81,30 @@ export default {
 </script>
 
 <template>
-  <img
-    v-tooltip
-    :class="{
-      lazy: lazy,
-      [avatarSizeClass]: true,
-      [cssClasses]: true
-    }"
-    :src="resultantSrcAttribute"
-    :width="size"
-    :height="size"
-    :alt="imgAlt"
-    :data-src="sanitizedSource"
-    :data-container="tooltipContainer"
-    :data-placement="tooltipPlacement"
-    :title="tooltipText"
-    class="avatar"
-    data-boundary="window"
-  />
+  <span>
+    <img
+      ref="userAvatarImage"
+      :class="{
+        lazy: lazy,
+        [avatarSizeClass]: true,
+        [cssClasses]: true
+      }"
+      :src="resultantSrcAttribute"
+      :width="size"
+      :height="size"
+      :alt="imgAlt"
+      :data-src="sanitizedSource"
+      class="avatar"
+    />
+    <gl-tooltip
+      :target="() => $refs.userAvatarImage"
+      :placement="tooltipPlacement"
+      boundary="window"
+      class="js-user-avatar-image-toolip"
+    >
+      <slot>
+        {{ tooltipText }}
+      </slot>
+    </gl-tooltip>
+  </span>
 </template>
diff --git a/app/assets/javascripts/vue_shared/components/user_avatar/user_avatar_link.vue b/app/assets/javascripts/vue_shared/components/user_avatar/user_avatar_link.vue
index dd6f96e2609..351a639c6e8 100644
--- a/app/assets/javascripts/vue_shared/components/user_avatar/user_avatar_link.vue
+++ b/app/assets/javascripts/vue_shared/components/user_avatar/user_avatar_link.vue
@@ -17,9 +17,8 @@
 
 */
 
-import { GlLink } from '@gitlab-org/gitlab-ui';
+import { GlLink, GlTooltipDirective } from '@gitlab-org/gitlab-ui';
 import userAvatarImage from './user_avatar_image.vue';
-import tooltip from '../../directives/tooltip';
 
 export default {
   name: 'UserAvatarLink',
@@ -28,7 +27,7 @@ export default {
     userAvatarImage,
   },
   directives: {
-    tooltip,
+    GlTooltip: GlTooltipDirective,
   },
   props: {
     linkHref: {
@@ -94,11 +93,14 @@ export default {
       :size="imgSize"
       :tooltip-text="avatarTooltipText"
       :tooltip-placement="tooltipPlacement"
-    /><span
+    >
+      <slot></slot>
+    </user-avatar-image><span
       v-if="shouldShowUsername"
-      v-tooltip
+      v-gl-tooltip
       :title="tooltipText"
       :tooltip-placement="tooltipPlacement"
+      class="js-user-avatar-link-username"
     >{{ username }}</span><slot name="avatar-badge"></slot>
   </gl-link>
 </template>
diff --git a/app/assets/stylesheets/framework/common.scss b/app/assets/stylesheets/framework/common.scss
index fa753b13e5f..626c8f92d1d 100644
--- a/app/assets/stylesheets/framework/common.scss
+++ b/app/assets/stylesheets/framework/common.scss
@@ -33,6 +33,11 @@
   color: $brand-danger;
 }
 
+.text-danger-muted,
+.text-danger-muted:hover {
+  color: $red-300;
+}
+
 .text-warning,
 .text-warning:hover {
   color: $brand-warning;
@@ -345,6 +350,7 @@ img.emoji {
 /** COMMON CLASSES **/
 .prepend-top-0 { margin-top: 0; }
 .prepend-top-2 { margin-top: 2px; }
+.prepend-top-4 { margin-top: $gl-padding-4; }
 .prepend-top-5 { margin-top: 5px; }
 .prepend-top-8 { margin-top: $grid-size; }
 .prepend-top-10 { margin-top: 10px; }
@@ -365,6 +371,7 @@ img.emoji {
 .append-right-default { margin-right: $gl-padding; }
 .append-right-20 { margin-right: 20px; }
 .append-bottom-0 { margin-bottom: 0; }
+.append-bottom-4 { margin-bottom: $gl-padding-4; }
 .append-bottom-5 { margin-bottom: 5px; }
 .append-bottom-8 { margin-bottom: $grid-size; }
 .append-bottom-10 { margin-bottom: 10px; }
diff --git a/app/assets/stylesheets/framework/variables.scss b/app/assets/stylesheets/framework/variables.scss
index bfcac3f1c3f..016fee862e8 100644
--- a/app/assets/stylesheets/framework/variables.scss
+++ b/app/assets/stylesheets/framework/variables.scss
@@ -195,6 +195,7 @@ $well-light-text-color: #5b6169;
  * Text
  */
 $gl-font-size: 14px;
+$gl-font-size-xs: 11px;
 $gl-font-size-small: 12px;
 $gl-font-weight-normal: 400;
 $gl-font-weight-bold: 600;
@@ -440,7 +441,7 @@ $ci-skipped-color: #888;
 * Boards
 */
 $issue-boards-font-size: 14px;
-$issue-boards-card-shadow: rgba(186, 186, 186, 0.5);
+$issue-boards-card-shadow: rgba(0, 0, 0, 0.1);
 /*
  The following heights are used in boards.scss and are used for calculation of the board height.
  They probably should be derived in a smarter way.
diff --git a/app/assets/stylesheets/pages/boards.scss b/app/assets/stylesheets/pages/boards.scss
index 54fbd40cece..c6074eb9df4 100644
--- a/app/assets/stylesheets/pages/boards.scss
+++ b/app/assets/stylesheets/pages/boards.scss
@@ -90,20 +90,14 @@
   }
 
   .with-performance-bar & {
-    height: calc(
-      100vh - #{$issue-board-list-difference-xs} - #{$performance-bar-height}
-    );
+    height: calc(100vh - #{$issue-board-list-difference-xs} - #{$performance-bar-height});
 
     @include media-breakpoint-only(sm) {
-      height: calc(
-        100vh - #{$issue-board-list-difference-sm} - #{$performance-bar-height}
-      );
+      height: calc(100vh - #{$issue-board-list-difference-sm} - #{$performance-bar-height});
     }
 
     @include media-breakpoint-up(md) {
-      height: calc(
-        100vh - #{$issue-board-list-difference-md} - #{$performance-bar-height}
-      );
+      height: calc(100vh - #{$issue-board-list-difference-md} - #{$performance-bar-height});
     }
   }
 }
@@ -271,7 +265,7 @@
   height: 100%;
   width: 100%;
   margin-bottom: 0;
-  padding: 5px;
+  padding: $gl-padding-4;
   list-style: none;
   overflow-y: auto;
   overflow-x: hidden;
@@ -284,14 +278,16 @@
 
 .board-card {
   position: relative;
-  padding: 11px 10px 11px $gl-padding;
+  padding: $gl-padding;
   background: $white-light;
   border-radius: $border-radius-default;
+  border: 1px solid $theme-gray-200;
   box-shadow: 0 1px 2px $issue-boards-card-shadow;
   list-style: none;
+  line-height: $gl-padding;
 
   &:not(:last-child) {
-    margin-bottom: 5px;
+    margin-bottom: $gl-padding-8;
   }
 
   &.is-active,
@@ -302,113 +298,120 @@
   .badge {
     border: 0;
     outline: 0;
+
+    &:hover {
+      text-decoration: underline;
+    }
+
+    @include media-breakpoint-down(lg) {
+      font-size: $gl-font-size-xs;
+      padding-left: $gl-padding-4;
+      padding-right: $gl-padding-4;
+      font-weight: $gl-font-weight-bold;
+    }
+  }
+
+  svg {
+    vertical-align: top;
   }
 
   .confidential-icon {
-    vertical-align: text-top;
-    margin-right: 5px;
+    color: $orange-600;
+    cursor: help;
+  }
+
+  @include media-breakpoint-down(md) {
+    padding: $gl-padding-8;
   }
 }
 
 .board-card-title {
   @include overflow-break-word();
-  margin: 0 30px 0 0;
   font-size: 1em;
-  line-height: inherit;
 
   a {
     color: $gl-text-color;
-    margin-right: 2px;
+  }
+
+  @include media-breakpoint-down(md) {
+    font-size: $label-font-size;
   }
 }
 
 .board-card-header {
   display: flex;
-  min-height: 20px;
-
-  .board-card-assignee {
-    display: flex;
-    justify-content: flex-end;
-    position: absolute;
-    right: 15px;
-    height: 20px;
-    width: 20px;
+}
 
-    .avatar-counter {
-      display: none;
-      vertical-align: middle;
-      min-width: 20px;
-      line-height: 19px;
-      height: 20px;
-      padding-left: 2px;
-      padding-right: 2px;
-      border-radius: 2em;
-    }
+.board-card-assignee {
+  display: flex;
+  margin-top: -$gl-padding-4;
+  margin-bottom: -$gl-padding-4;
+
+  .avatar-counter {
+    vertical-align: middle;
+    line-height: $gl-padding-24;
+    min-width: $gl-padding-24;
+    height: $gl-padding-24;
+    border-radius: $gl-padding-24;
+    background-color: $gl-text-color-tertiary;
+    font-size: $gl-font-size-xs;
+    cursor: help;
+    font-weight: $gl-font-weight-bold;
+    margin-left: -$gl-padding-4;
+    border: 0;
+    padding: 0 $gl-padding-4;
 
-    img {
-      vertical-align: top;
+    @include media-breakpoint-down(md) {
+      min-width: auto;
+      height: $gl-padding;
+      border-radius: $gl-padding;
+      line-height: $gl-padding;
     }
+  }
 
-    a {
-      position: relative;
-      margin-left: -15px;
-    }
+  img {
+    vertical-align: top;
+  }
 
-    a:nth-child(1) {
-      z-index: 3;
-    }
+  .user-avatar-link:not(:only-child) {
+    margin-left: -$gl-padding-4;
 
-    a:nth-child(2) {
+    &:nth-of-type(1) {
       z-index: 2;
     }
 
-    a:nth-child(3) {
+    &:nth-of-type(2) {
       z-index: 1;
     }
+  }
 
-    a:nth-child(4) {
-      display: none;
-    }
-
-    &:hover {
-      .avatar-counter {
-        display: inline-block;
-      }
-
-      a {
-        position: static;
-        background-color: $white-light;
-        transition: background-color 0s;
-        margin-left: auto;
-
-        &:nth-child(4) {
-          display: block;
-        }
+  .avatar {
+    margin: 0;
 
-        &:first-child:not(:only-child) {
-          box-shadow: -10px 0 10px 1px $white-light;
-        }
-      }
+    @include media-breakpoint-down(md) {
+      width: $gl-padding;
+      height: $gl-padding;
     }
   }
 
-  .avatar {
-    margin: 0;
+  @include media-breakpoint-down(md) {
+    margin-top: 0;
+    margin-bottom: 0;
   }
 }
 
-.board-card-footer {
-  margin: 0 0 5px;
+.board-card-number {
+  font-size: $gl-font-size-xs;
+  color: $gl-text-color-secondary;
+  overflow: hidden;
 
-  .badge {
-    margin-top: 5px;
-    margin-right: 6px;
+  @include media-breakpoint-up(md) {
+    font-size: $label-font-size;
   }
 }
 
-.board-card-number {
-  font-size: 12px;
-  color: $gl-text-color-secondary;
+.board-card-number-container {
+  overflow: hidden;
 }
 
 .issue-boards-search {
@@ -474,8 +477,7 @@
 .right-sidebar.right-sidebar-expanded {
   &.boards-sidebar-slide-enter-active,
   &.boards-sidebar-slide-leave-active {
-    transition: width $sidebar-transition-duration,
-      padding $sidebar-transition-duration;
+    transition: width $sidebar-transition-duration, padding $sidebar-transition-duration;
   }
 
   &.boards-sidebar-slide-enter,
@@ -650,3 +652,36 @@
     }
   }
 }
+
+.board-card-info {
+  color: $gl-text-color-secondary;
+  white-space: nowrap;
+  margin-right: $gl-padding-8;
+
+  &:not(.board-card-weight) {
+    cursor: help;
+  }
+
+  &.board-card-weight {
+    color: $gl-text-color;
+    cursor: pointer;
+
+    &:hover {
+      color: initial;
+      text-decoration: underline;
+    }
+  }
+
+  .board-card-info-icon {
+    color: $theme-gray-600;
+    margin-right: $gl-padding-4;
+  }
+
+  @include media-breakpoint-down(md) {
+    font-size: $label-font-size;
+  }
+}
+
+.board-issue-path.js-show-tooltip {
+  cursor: help;
+}
diff --git a/app/serializers/issue_board_entity.rb b/app/serializers/issue_board_entity.rb
index 6a9e9638e70..4e3d03b236b 100644
--- a/app/serializers/issue_board_entity.rb
+++ b/app/serializers/issue_board_entity.rb
@@ -12,6 +12,7 @@ class IssueBoardEntity < Grape::Entity
   expose :project_id
   expose :relative_position
   expose :weight, if: -> (*) { respond_to?(:weight) }
+  expose :time_estimate
 
   expose :project do |issue|
     API::Entities::Project.represent issue.project, only: [:id, :path]