WIP Group contributions in UI

app/components/contribution-list/component.js

@@ -1,7 +1,7 @@
 import Component from '@ember/component';
-import { computed } from '@ember/object';
+import EmberObject, { computed, observer } from '@ember/object';
 import { sort } from '@ember/object/computed';
-import { isPresent } from '@ember/utils';
+import { isEmpty, isPresent } from '@ember/utils';
 import { inject as service } from '@ember/service';
 
 export default Component.extend({
@@ -12,6 +12,7 @@ export default Component.extend({
   classNames: ['contributions'],
 
   selectedContribution: null,
+  expandedGroup: null,
 
   showQuickFilter: false,
   hideSmallContributions: false,
@@ -33,23 +34,96 @@ export default Component.extend({
     return this.contributions.mapBy('kind').uniq();
   }),
 
-  contributionsFiltered: computed('contributions.[]', 'hideSmallContributions', 'contributorId', 'contributionKind', function() {
-    return this.contributions.filter(c => {
-      let included = true;
+  // Groups the contributions by their `groupId` (derived from `url`; see
+  // utils/contribution-grouping-key), then filters the groups: a group is
+  // included when any of its items matches the active filters, and when
+  // included all of its items render (grouped rows stay whole — filtering by
+  // a contributor does not collapse a group into a singleton). Preserves the
+  // input order so the controller's date-sort is retained. Manual
+  // contributions without a URL each form their own single-item group.
+  //
+  // Each group object exposes: groupId, items, contributors, contributorIds,
+  // amount (single contribution's, not a sum), kind, description, url, date,
+  // isGrouped, visibleContributors (capped at 3), extraContributorCount.
+  groupedContributions: computed('contributions.[]', 'hideSmallContributions', 'contributorId', 'contributionKind', function() {
+    const groupsMap = new Map();
+    const orderedGroups = [];
 
-      if (this.hideSmallContributions &&
-          c.amount <= 500) { included = false; }
-
-      if (isPresent(this.contributorId) &&
-          c.contributorId !== parseInt(this.contributorId)) { included = false; }
-
-      if (isPresent(this.contributionKind) &&
-          c.kind !== this.contributionKind) { included = false; }
-
-      return included;
+    this.contributions.forEach(c => {
+      const groupId = c.groupId;
+      if (isEmpty(groupId)) {
+        orderedGroups.push({ groupId: null, items: [c] });
+      } else if (groupsMap.has(groupId)) {
+        groupsMap.get(groupId).items.push(c);
+      } else {
+        const group = { groupId, items: [c] };
+        groupsMap.set(groupId, group);
+        orderedGroups.push(group);
+      }
     });
+
+    return orderedGroups
+      .filter(raw => raw.items.any(c => this.matchesFilters(c)))
+      .map(raw => {
+        const items = raw.items;
+        const first = items.firstObject;
+        const contributorIds = items.mapBy('contributorId').uniq();
+        const contributors = contributorIds
+          .map(id => this.contributors.findBy('id', id))
+          .filter(Boolean);
+
+        return EmberObject.create({
+          groupId: raw.groupId,
+          items,
+          contributors,
+          contributorIds,
+          amount: first ? first.amount : null,
+          kind: first ? first.kind : null,
+          description: first ? first.description : null,
+          url: first ? first.url : null,
+          date: first ? first.date : null,
+          isGrouped: items.length > 1,
+          visibleContributors: contributors.slice(0, 3),
+          extraContributorCount: Math.max(0, contributors.length - 3)
+        });
+      });
   }),
 
+  // Shared filter predicates for a single contribution. Used to decide group
+  // inclusion in `groupedContributions`. A group is shown when any of its
+  // items passes; "hide small contributions" thus keeps a group as long as
+  // any item is above the threshold.
+  matchesFilters (c) {
+    if (this.hideSmallContributions && c.amount <= 500) return false;
+    if (isPresent(this.contributorId) &&
+        c.contributorId !== parseInt(this.contributorId)) return false;
+    if (isPresent(this.contributionKind) &&
+        c.kind !== this.contributionKind) return false;
+    return true;
+  },
+
+  // Auto-expands the group containing the selected contribution so the
+  // selected child row is visible with the `selected` highlight.
+  autoExpandSelected: observer('selectedContributionId', function() {
+    this._autoExpandSelected();
+  }),
+
+  _autoExpandSelected () {
+    const selectedId = this.selectedContributionId;
+    if (!selectedId) return;
+    const group = this.groupedContributions.find(g =>
+      g.items.findBy('id', selectedId)
+    );
+    if (group && group.isGrouped && this.expandedGroup !== group.groupId) {
+      this.set('expandedGroup', group.groupId);
+    }
+  },
+
+  init () {
+    this._super(...arguments);
+    this._autoExpandSelected();
+  },
+
   actions: {
 
     veto (contributionId) {
@@ -62,6 +136,14 @@ export default Component.extend({
 
     openContributionDetails(contribution) {
       this.router.transitionTo('dashboard.contributions.show', contribution);
+    },
+
+    toggleGroup (group) {
+      if (this.expandedGroup === group.groupId) {
+        this.set('expandedGroup', null);
+      } else {
+        this.set('expandedGroup', group.groupId);
+      }
     }
 
   }

app/components/contribution-list/template.hbs

@@ -30,27 +30,76 @@
 {{/if}}
 
 <ul class="item-list contribution-list {{if @loading 'loading'}}">
-  {{#each this.contributionsFiltered as |contribution|}}
-    <li role="button" data-contribution-id={{contribution.id}}
-        {{action "openContributionDetails" contribution}}
-        class="{{item-status contribution}}{{if (eq contribution.id @selectedContributionId) " selected"}}">
-      <p class="meta">
-        <span class="recipient"><UserAvatar @contributor={{contribution.contributor}} /></span>
-        <span class="category {{contribution.kind}}">({{contribution.kind}})</span>
-        <span class="title">{{contribution.description}}</span>
-      </p>
-      <p class="kredits-amount">
-        <span class="amount">{{contribution.amount}}</span><span class="symbol">₭S</span>
-      </p>
-      {{#unless contribution.vetoed}}
-        {{#unless (is-confirmed-contribution contribution)}}
-          <p class="voting">
-            {{input type="button" class="button small danger" value="veto"
-                    click=(action "veto" contribution.id)
-                    disabled=contribution.hasPendingChanges}}
+  {{#each this.groupedContributions as |group|}}
+    {{#if group.isGrouped}}
+      <li role="button" data-group-id={{group.groupId}}
+          {{action "toggleGroup" group}}
+          class="grouped {{if (eq this.expandedGroup group.groupId) "expanded"}}">
+        <p class="meta">
+          <span class="avatars">
+            {{#each group.visibleContributors as |contributor|}}
+              <UserAvatar @contributor={{contributor}} />
+            {{/each}}
+            {{#if group.extraContributorCount}}
+              <span class="avatar-overflow">+{{group.extraContributorCount}}</span>
+            {{/if}}
+          </span>
+          <span class="category {{group.kind}}">({{group.kind}})</span>
+          <span class="title">{{group.description}}</span>
+        </p>
+        <p class="kredits-amount">
+          <span class="amount">{{group.amount}}</span><span class="symbol">₭S</span>
+        </p>
+      </li>
+      {{#if (eq this.expandedGroup group.groupId)}}
+        {{#each group.items key="id" as |contribution|}}
+          <li role="button" data-contribution-id={{contribution.id}}
+              {{action "openContributionDetails" contribution}}
+              class="group-item {{item-status contribution}}{{if (eq contribution.id @selectedContributionId) " selected"}}">
+            <p class="meta">
+              <span class="recipient"><UserAvatar @contributor={{contribution.contributor}} /></span>
+              <span class="category {{contribution.kind}}">({{contribution.kind}})</span>
+              <span class="title">{{contribution.description}}</span>
+            </p>
+            <p class="kredits-amount">
+              <span class="amount">{{contribution.amount}}</span><span class="symbol">₭S</span>
+            </p>
+            {{#unless contribution.vetoed}}
+              {{#unless (is-confirmed-contribution contribution)}}
+                <p class="voting">
+                  {{input type="button" class="button small danger" value="veto"
+                          click=(action "veto" contribution.id)
+                          disabled=contribution.hasPendingChanges}}
+                </p>
+              {{/unless}}
+            {{/unless}}
+          </li>
+        {{/each}}
+      {{/if}}
+    {{else}}
+      {{#each group.items as |contribution|}}
+        <li role="button" data-contribution-id={{contribution.id}}
+            {{action "openContributionDetails" contribution}}
+            class="{{item-status contribution}}{{if (eq contribution.id @selectedContributionId) " selected"}}">
+          <p class="meta">
+            <span class="recipient"><UserAvatar @contributor={{contribution.contributor}} /></span>
+            <span class="category {{contribution.kind}}">({{contribution.kind}})</span>
+            <span class="title">{{contribution.description}}</span>
           </p>
-        {{/unless}}
-      {{/unless}}
-    </li>
+          <p class="kredits-amount">
+            <span class="amount">{{contribution.amount}}</span><span class="symbol">₭S</span>
+          </p>
+          {{#unless contribution.vetoed}}
+            {{#unless (is-confirmed-contribution contribution)}}
+              <p class="voting">
+                {{input type="button" class="button small danger" value="veto"
+                        click=(action "veto" contribution.id)
+                        disabled=contribution.hasPendingChanges}}
+              </p>
+            {{/unless}}
+          {{/unless}}
+        </li>
+      {{/each}}
+    {{/if}}
   {{/each}}
-</ul>
+</ul>

app/controllers/dashboard/contributions/show.js

@@ -1,12 +1,19 @@
 
 import Controller from '@ember/controller';
 import { computed } from '@ember/object';
+import { inject as service } from '@ember/service';
 import config from 'kredits-web/config/environment';
 
 export default Controller.extend({
 
+  kredits: service(),
+
   ipfsGatewayUrl: computed(function() {
     return config.ipfs.gatewayUrl;
+  }),
+
+  siblingContributions: computed('model.groupId', 'kredits.contributions.[]', function() {
+    return this.kredits.siblingContributions(this.model);
   })
 
 });

app/styles/components/_contribution-details.scss

@@ -49,6 +49,55 @@ section#contribution-details {
         text-decoration: underline;
       }
     }
+
+    .co-contributors {
+      margin-top: 2rem;
+      padding-top: 2rem;
+      border-top: 1px solid $item-border-color;
+
+      h4 {
+        font-size: 1.2rem;
+        margin-bottom: 1rem;
+        color: $body-text-color;
+      }
+
+      ul {
+        list-style: none;
+
+        li {
+          display: flex;
+          align-items: center;
+          padding: 0.5rem 0;
+          gap: 0.5rem;
+
+          .co-contributor {
+            display: inline-flex;
+            align-items: center;
+            text-decoration: none;
+            color: $body-text-color;
+            flex: 1;
+
+            .name {
+              margin-left: 0.5rem;
+            }
+
+            .amount {
+              margin-left: auto;
+              font-weight: 500;
+            }
+
+            .symbol {
+              font-size: 0.8rem;
+              padding-left: 0.2rem;
+            }
+
+            &:hover .name {
+              color: $primary-color;
+            }
+          }
+        }
+      }
+    }
   }
 
   .actions {

app/styles/components/_contribution-list.scss

@@ -41,6 +41,62 @@ ul.contribution-list {
       opacity: 0.6;
     }
 
+    &.grouped {
+      grid-template-columns: auto 5rem;
+
+      .avatars {
+        display: inline-flex;
+        align-items: center;
+
+        img.avatar {
+          margin-right: 0;
+          margin-left: -0.6rem;
+          border: 2px solid $item-background-color;
+          z-index: 1;
+          position: relative;
+
+          &:first-child {
+            margin-left: 0;
+            z-index: 3;
+          }
+
+          &:nth-child(2) {
+            z-index: 2;
+          }
+        }
+
+        .avatar-overflow {
+          display: inline-flex;
+          align-items: center;
+          justify-content: center;
+          width: 2rem;
+          height: 2rem;
+          margin-left: -0.6rem;
+          border-radius: 1rem;
+          background-color: $blue;
+          color: #fff;
+          font-size: 0.8rem;
+          font-weight: 500;
+          border: 2px solid $item-background-color;
+          z-index: 0;
+          position: relative;
+        }
+      }
+
+      &.expanded {
+        border-bottom: none;
+      }
+    }
+
+    &.group-item {
+      padding-left: 2.8rem;
+      background-color: $item-highlighted-background-color;
+
+      &:not(:last-child) {
+        border-bottom: 1px solid $item-border-color;
+      }
+    }
+
     p {
       align-self: center;
       margin: 0;

app/templates/dashboard/contributions/show.hbs

@@ -32,6 +32,22 @@
         </a>
       </p>
     {{/if}}
+    {{#if this.siblingContributions.length}}
+      <div class="co-contributors">
+        <h4>Also contributed to this</h4>
+        <ul>
+          {{#each this.siblingContributions as |sibling|}}
+            <li>
+              <LinkTo @route="dashboard.contributions.show" @model={{sibling}} class="co-contributor">
+                <UserAvatar @contributor={{sibling.contributor}} />
+                <span class="name">{{sibling.contributor.name}}</span>
+                <span class="amount">{{sibling.amount}}</span><span class="symbol">₭S</span>
+              </LinkTo>
+            </li>
+          {{/each}}
+        </ul>
+      </div>
+    {{/if}}
     {{#if this.model.vetoed}}
       <div class="hint vetoed">
         <div class="icon">

app/utils/contribution-grouping-key.js

@@ -1,15 +1,12 @@
 import { isEmpty } from '@ember/utils';
 
-//
 // Derives a stable grouping key for a contribution, so that contributions
 // created for the same issue/pull request (one per contributor) can be
 // linked together in the UI.
 //
-// The bot writes the exact same `url` string (the html_url of the issue/PR)
-// into every per-contributor IPFS document for a given piece of work, so the
-// top-level `url` field on the model is sufficient as a grouping key. Manual
-// contributions without a URL return null and are treated as singletons.
-//
+// Until we have identical IPFS documents for different contributions, we will
+// use the URL as grouping key
+
 export default function contributionGroupingKey (contribution) {
   let url = contribution ? contribution.url : null;
   if (isEmpty(url)) return null;