Show favorites across all days when current day has none

src/app/pages/schedule/schedule.html

@@ -33,8 +33,11 @@
   <ion-list #scheduleList [hidden]="shownSessions !== 0">
     <div *ngIf="segment === 'favorites'" class="ion-padding ion-text-center empty-favorites">
       <ion-icon name="star-outline" class="empty-icon"></ion-icon>
-      <h2>No favorites yet</h2>
-      <p>Browse the schedule and tap the <ion-icon name="star-outline" style="font-size: 1em; vertical-align: middle;"></ion-icon> on sessions you're interested in to build your personal schedule.</p>
+      <h2 *ngIf="!hasFavoritesOnOtherDays">No favorites yet</h2>
+      <p *ngIf="!hasFavoritesOnOtherDays">Browse the schedule and tap the <ion-icon name="star-outline" style="font-size: 1em; vertical-align: middle;"></ion-icon> on sessions you're interested in to build your personal schedule.</p>
+      <h2 *ngIf="hasFavoritesOnOtherDays">No favorites on {{days[dayIndex]?.day}}</h2>
+      <p *ngIf="hasFavoritesOnOtherDays">You have favorites on other days.</p>
+      <ion-button *ngIf="hasFavoritesOnOtherDays" fill="clear" size="small" (click)="showAllFavorites()">Show favorites on other days</ion-button>
       <ion-button fill="clear" size="small" (click)="toggleFavorites()">Show all sessions</ion-button>
     </div>
     <div *ngIf="segment !== 'favorites'">
@@ -56,7 +59,7 @@ <h2>No favorites yet</h2>
     <ion-item-group *ngFor="let group of groups" [hidden]="group.hide">
       <ion-item-divider sticky>
         <ion-label [class]="(group.startTime < currentTime)? 'past': (group.startTime)? 'future' : 'non'">
-          {{days[dayIndex].day}} - {{group.time}}
+          {{allDaysMode ? group.dayLabel : days[dayIndex]?.day}} - {{group.time}}
         </ion-label>
       </ion-item-divider>
 

src/app/pages/schedule/schedule.ts

@@ -36,6 +36,8 @@ export class SchedulePage implements OnInit, OnDestroy {
   currentTime: Date;
   todayIndex: string = null;
   jumpBtnCollapsed: boolean = false;
+  hasFavoritesOnOtherDays: boolean = false;
+  allDaysMode: boolean = false;
   private favoritesSubscription: Subscription;
 
   constructor(
@@ -130,6 +132,7 @@ export class SchedulePage implements OnInit, OnDestroy {
 
   updateSchedule() {
     this.searchedAllDays = false;
+    this.allDaysMode = false;
 
     // Close any open sliding items when the schedule updates
     if (this.scheduleList) {
@@ -143,6 +146,12 @@ export class SchedulePage implements OnInit, OnDestroy {
     this.confData.getTimeline(this.dayIndex, this.queryText, this.excludeTracks, this.segment).subscribe((data: any) => {
       this.shownSessions = data.shownSessions;
       this.groups = data.groups;
+
+      if (this.segment === 'favorites' && this.shownSessions === 0) {
+        this.checkFavoritesOnOtherDays();
+      } else {
+        this.hasFavoritesOnOtherDays = false;
+      }
     });
 
     this.changeDetectorRef.detectChanges();
@@ -178,6 +187,29 @@ export class SchedulePage implements OnInit, OnDestroy {
     this.updateSchedule();
   }
 
+  checkFavoritesOnOtherDays() {
+    this.hasFavoritesOnOtherDays = false;
+    for (let i = 0; i < this.days.length; i++) {
+      if (String(i) === this.dayIndex) continue;
+      this.confData.getTimeline(String(i), '', this.excludeTracks, 'favorites').subscribe((data: any) => {
+        if (data.shownSessions > 0) {
+          this.hasFavoritesOnOtherDays = true;
+          this.changeDetectorRef.detectChanges();
+        }
+      });
+    }
+  }
+
+  showAllFavorites() {
+    this.allDaysMode = true;
+    this.confData.getAllDaysTimeline(this.queryText, this.excludeTracks, 'favorites').subscribe((data: any) => {
+      this.shownSessions = data.shownSessions;
+      this.groups = data.groups;
+      this.hasFavoritesOnOtherDays = false;
+      this.changeDetectorRef.detectChanges();
+    });
+  }
+
   searchAllDays() {
     let found = false;
     let checked = 0;

src/app/providers/conference-data.ts

@@ -477,6 +477,47 @@ export class ConferenceData {
     );
   }
 
+  getAllDaysTimeline(
+    queryText = '',
+    excludeTracks: any[] = [],
+    segment = 'all'
+  ) {
+    return this.load().pipe(
+      map((data: any) => {
+        const schedule = data.schedule.sort(function(a, b){var x = a.date; var y = b.date; return ((x < y) ? -1 : ((x > y) ? 1 : 0));});
+        let shownSessions = 0;
+        const allGroups = [];
+
+        queryText = queryText.toLowerCase().replace(/,|\.|-/g, ' ');
+        const queryWords = queryText.split(' ').filter(w => !!w.trim().length);
+
+        schedule.forEach((day: any) => {
+          const dateObj = new Date(day.date + "T00:00:00.000-12:00");
+          const dayLabel = dateObj.toLocaleDateString('en-us', {timeZone: environment.timezone, weekday: 'short'});
+
+          day.groups.forEach((group: any) => {
+            group.hide = true;
+            group.dayLabel = dayLabel;
+
+            group.sessions.forEach((session: any) => {
+              this.filterSession(session, queryWords, excludeTracks, segment);
+              if (!session.hide) {
+                group.hide = false;
+                shownSessions++;
+              }
+            });
+
+            if (!group.hide) {
+              allGroups.push(group);
+            }
+          });
+        });
+
+        return { shownSessions, groups: allGroups };
+      })
+    );
+  }
+
   getSessions(
     queryText = '',
     excludeTracks: any[] = [],