(feat) infinite scroll feed service

src/common/services/feeds.service.js

@@ -44,11 +44,26 @@ export default class FeedsService {
  */
  feed = [];
 
+ /**
+ * @var {string}
+ */
+ pagingToken: string = '';
+
+ /**
+ * @var {boolean}
+ */
+ endReached = false;
+
  /**
  * Get entities from the current page
  */
  async getEntities() {
+ const end = this.limit + this.offset;
+ if (end > this.feed.length && !this.endReached) {
+ await this.fetch();
+ }
  const feedPage = this.feed.slice(this.offset, this.limit + this.offset);
+
  return await entitiesService.getFromFeed(feedPage, this, this.asActivities);
  }
 
@@ -150,9 +165,14 @@ export default class FeedsService {
  */
  async fetch() {
  abort(this);
- const response = await apiService.get(this.endpoint, {...this.params, ...{ limit: 150, as_activities: this.asActivities ? 1 : 0 }}, this);
+ const response = await apiService.get(this.endpoint, {...this.params, ...{ limit: 150, as_activities: this.asActivities ? 1 : 0, from_timestamp: this.pagingToken }}, this);
 
- this.feed = response.entities;
+ if (response.entities.length) {
+ this.feed = this.feed.concat(response.entities);
+ this.pagingToken = response['load-next'];
+ } else {
+ this.endReached = true;
+ }
 
  // save without wait
  feedsStorage.save(this);