FEATURE: upcoming events list component

assets/javascripts/discourse/components/upcoming-events-list.gjs

@@ -0,0 +1,178 @@
+import DButton from "discourse/components/d-button";
+import Component from "@glimmer/component";
+import { ajax } from "discourse/lib/ajax";
+import I18n from "discourse-i18n";
+import { tracked } from "@glimmer/tracking";
+import { inject as service } from "@ember/service";
+import { action } from "@ember/object";
+import { isNotFullDayEvent } from "../lib/guess-best-date-format";
+import ConditionalLoadingSpinner from "discourse/components/conditional-loading-spinner";
+import or from "truth-helpers/helpers/or";
+
+export const DEFAULT_MONTH_FORMAT = "MMMM YYYY";
+export const DEFAULT_DATE_FORMAT = "dddd, MMM D";
+export const DEFAULT_TIME_FORMAT = "LT";
+
+export default class UpcomingEventsList extends Component {
+  @service appEvents;
+  @service siteSettings;
+  @service router;
+
+  @tracked isLoading = true;
+  @tracked hasError = false;
+  @tracked eventsByMonth = {};
+
+  monthFormat = this.args.params?.monthFormat ?? DEFAULT_MONTH_FORMAT;
+  dateFormat = this.args.params?.dateFormat ?? DEFAULT_DATE_FORMAT;
+  timeFormat = this.args.params?.timeFormat ?? DEFAULT_TIME_FORMAT;
+
+  title = I18n.t("discourse_post_event.upcoming_events_list.title");
+  emptyMessage = I18n.t("discourse_post_event.upcoming_events_list.empty");
+  allDayLabel = I18n.t("discourse_post_event.upcoming_events_list.all_day");
+  errorMessage = I18n.t("discourse_post_event.upcoming_events_list.error");
+
+  constructor() {
+    super(...arguments);
+
+    this.appEvents.on("page:changed", this, this.updateEventsByMonth);
+  }
+
+  get shouldRender() {
+    if (!this.categoryId) {
+      return false;
+    }
+
+    const eventSettings =
+      this.siteSettings.events_calendar_categories.split("|");
+
+    return eventSettings.includes(this.categoryId.toString());
+  }
+
+  get categoryId() {
+    return this.router.currentRoute.attributes?.category?.id;
+  }
+
+  get hasEmptyResponse() {
+    return (
+      !this.isLoading &&
+      !this.hasError &&
+      Object.keys(this.eventsByMonth).length === 0
+    );
+  }
+
+  @action
+  async updateEventsByMonth() {
+    this.isLoading = true;
+    this.hasError = false;
+
+    try {
+      const { events } = await ajax("/discourse-post-event/events", {
+        data: { category_id: this.categoryId },
+      });
+
+      this.eventsByMonth = this.groupByMonthAndDay(events);
+    } catch {
+      this.hasError = true;
+    } finally {
+      this.isLoading = false;
+    }
+  }
+
+  @action
+  formatMonth(month) {
+    return moment(month, "YYYY-MM").format(this.monthFormat);
+  }
+
+  @action
+  formatDate(month, day) {
+    return moment(`${month}-${day}`, "YYYY-MM-DD").format(this.dateFormat);
+  }
+
+  @action
+  formatTime({ starts_at, ends_at }) {
+    return isNotFullDayEvent(moment(starts_at), moment(ends_at))
+      ? moment(starts_at).format(this.timeFormat)
+      : this.allDayLabel;
+  }
+
+  groupByMonthAndDay(data) {
+    return data.reduce((result, item) => {
+      const date = new Date(item.starts_at);
+      const year = date.getFullYear();
+      const month = date.getMonth() + 1;
+      const day = date.getDate();
+
+      const monthKey = `${year}-${month}`;
+
+      result[monthKey] = result[monthKey] ?? {};
+      result[monthKey][day] = result[monthKey][day] ?? [];
+
+      result[monthKey][day].push(item);
+
+      return result;
+    }, {});
+  }
+
+  <template>
+    {{#if this.shouldRender}}
+      <div class="upcoming-events-list">
+        <h3 class="upcoming-events-list__heading">
+          {{this.title}}
+        </h3>
+
+        <div class="upcoming-events-list__container">
+          <ConditionalLoadingSpinner @condition={{this.isLoading}} />
+
+          {{#if this.hasEmptyResponse}}
+            <div class="upcoming-events-list__empty-message">
+              {{this.emptyMessage}}
+            </div>
+          {{/if}}
+
+          {{#if this.hasError}}
+            <div class="upcoming-events-list__error-message">
+              {{this.errorMessage}}
+            </div>
+            <DButton
+              @action={{this.updateEventsByMonth}}
+              @label="discourse_post_event.upcoming_events_list.try_again"
+              class="btn-link upcoming-events-list__try-again"
+            />
+          {{/if}}
+
+          {{#unless this.isLoading}}
+            {{#each-in this.eventsByMonth as |month monthData|}}
+              {{#if this.monthFormat}}
+                <h4 class="upcoming-events-list__formatted-month">
+                  {{this.formatMonth month}}
+                </h4>
+              {{/if}}
+
+              {{#each-in monthData as |day events|}}
+                <div class="upcoming-events-list__day-section">
+                  <div class="upcoming-events-list__formatted-day">
+                    {{this.formatDate month day}}
+                  </div>
+
+                  {{#each events as |event|}}
+                    <a
+                      class="upcoming-events-list__event"
+                      href={{event.post.url}}
+                    >
+                      <div class="upcoming-events-list__event-time">
+                        {{this.formatTime event}}
+                      </div>
+                      <div class="upcoming-events-list__event-name">
+                        {{or event.name event.post.topic.title}}
+                      </div>
+                    </a>
+                  {{/each}}
+                </div>
+              {{/each-in}}
+            {{/each-in}}
+          {{/unless}}
+        </div>
+      </div>
+    {{/if}}
+  </template>
+}

assets/stylesheets/common/upcoming-events-calendar.scss

@@ -63,6 +63,7 @@
         background: var(--tertiary);
         color: var(--secondary);
       }
+
       margin: 0.3em 0 0.3em 0.5em;
     }
 
@@ -122,6 +123,7 @@
       margin-left: 0;
     }
   }
+
   .fc-list-item-add-to-calendar {
     color: var(--tertiary);
     font-size: var(--font-down-1);

assets/stylesheets/common/upcoming-events-list.scss

@@ -0,0 +1,36 @@
+.upcoming-events-list {
+  &__formatted-month {
+    font-weight: 600;
+  }
+
+  &__day-section {
+    display: flex;
+    flex-direction: column;
+    padding-bottom: 0.5rem;
+    gap: 0.5rem;
+  }
+
+  &__formatted-day {
+    margin-left: 0.5rem;
+    font-weight: 600;
+    font-size: var(--base-font-size);
+  }
+
+  &__event {
+    display: flex;
+    align-items: center;
+    margin-left: 1rem;
+    gap: 0.25rem;
+    font-size: var(--font-down-1);
+    line-height: var(--line-height-medium);
+  }
+
+  &__event-name {
+    width: 70%;
+  }
+
+  &__event-time {
+    width: 30%;
+    text-align: center;
+  }
+}

config/locales/client.en.yml

@@ -441,6 +441,12 @@ en:
         creator: "Creator"
         status: "Status"
         starts_at: "Starts at"
+      upcoming_events_list:
+        title: "Upcoming events"
+        empty: "No upcoming events"
+        all_day: "All-day"
+        error: "Failed to retrieve events"
+        try_again: "Try again"
     category:
       sort_topics_by_event_start_date: "Sort topics by event start date."
       disable_topic_resorting: "Disable topic resorting."

plugin.rb

@@ -32,6 +32,7 @@
 register_asset "stylesheets/desktop/discourse-calendar.scss", :desktop
 register_asset "stylesheets/colors.scss", :color_definitions
 register_asset "stylesheets/common/user-preferences.scss"
+register_asset "stylesheets/common/upcoming-events-list.scss"
 register_svg_icon "fas fa-calendar-day"
 register_svg_icon "fas fa-clock"
 register_svg_icon "fas fa-file-csv"