Dispatch message if the viewer has no media to show.

src/components/timeline-core.ts

@@ -509,8 +509,10 @@ export class FrigateCardTimelineCore extends LitElement {
             targetView: 'media',
           },
         );
-        const results = view?.queryResults?.getResults() ?? null;
+        const results = view?.queryResults?.getResults();
-        if (!results || !view) {
+        // Specifically ensure there are _some_ results before dispatching the
+        // view change.
+        if (!view || !results || !results.length) {
           return null;
         }
         view.mergeInContext(

src/components/viewer.ts

@@ -12,7 +12,7 @@ import {
 import { customElement, property } from 'lit/decorators.js';
 import { ifDefined } from 'lit/directives/if-defined.js';
 import { createRef, Ref, ref } from 'lit/directives/ref.js';
-import { renderProgressIndicator } from '../components/message.js';
+import { dispatchMessageEvent, renderProgressIndicator } from '../components/message.js';
 import viewerStyle from '../scss/viewer.scss';
 import viewerCarouselStyle from '../scss/viewer-carousel.scss';
 import {
@@ -53,6 +53,7 @@ import {
 } from '../utils/media-to-view.js';
 import { ViewMedia, ViewMediaClassifier } from '../view-media.js';
 import { guard } from 'lit/directives/guard.js';
+import { localize } from '../localize/localize.js';
 
 export interface MediaSeek {
   // Specifies the point at which this recording should be played, the
@@ -566,6 +567,12 @@ export class FrigateCardViewerCarousel extends LitElement {
    * @returns A template to display to the user.
    */
   protected _render(): TemplateResult | void {
+    if ((this.view?.queryResults?.getResultsCount() ?? 0) === 0) {
+      return dispatchMessageEvent(this, localize('common.no_media'), 'info', {
+        icon: 'mdi:multimedia',
+      });
+    }
+
     const media = this.view?.queryResults?.getSelectedResult();
     if (!media || !this.cameras) {
       return;

src/localize/languages/en.json

@@ -3,11 +3,7 @@
     "frigate_card": "Frigate card",
     "frigate_card_description": "A Lovelace card for use with Frigate",
     "live": "Live",
-    "no_clip": "No recent clip",
+    "no_media": "No media to display",
-    "no_clips": "No clips",
-    "no_snapshot": "No recent snapshot",
-    "no_snapshots": "No snapshots",
-    "no_recording": "No recent recording",
     "recordings": "Recordings",
     "version": "Version"
   },

src/localize/languages/it.json

@@ -3,10 +3,7 @@
     "frigate_card": "Frigate card",
     "frigate_card_description": "Una scheda Lovelace per l'uso con Frigate",
     "live": "Live",
-    "no_clip": "Nessuna clip recente",
+    "no_media": "",
-    "no_clips": "Nessun clip",
-    "no_snapshot": "Nessuna istantanea recente",
-    "no_snapshots": "Nessuna istantanea",
     "recordings": "Registrazioni",
     "version": "Versione"
   },

src/localize/languages/pt-BR.json

@@ -3,10 +3,7 @@
     "frigate_card": "Cartão Frigate",
     "frigate_card_description": "Um cartão da Lovelace para usar com Frigate",
     "live": "Ao Vivo",
-    "no_clip": "Sem clip recente",
+    "no_media": "",
-    "no_clips": "Sem clips",
-    "no_snapshot": "Sem snapshot recente",
-    "no_snapshots": "Sem snapshots",
     "recordings": "Gravações",
     "version": "Versão"
   },

src/utils/data/data-manager.ts

@@ -202,13 +202,11 @@ export class DataManager {
       }
     }
 
-    return mediaArray.length
+    return new MediaQueriesResults(
-      ? new MediaQueriesResults(
       orderBy(mediaArray, (media) => media.getStartTime(), 'desc'),
       // Select the first (most-recent) item.
-          0,
+      mediaArray.length ? 0 : null,
-        )
+    );
-      : null;
   }
 
   public getMediaDownloadPath(media: ViewMedia): string | null {

src/utils/media-to-view.ts

@@ -54,9 +54,9 @@ export const createViewForEvents = async (
     const queries = dataManager.generateDefaultEventQueries(cameraIDs, {
       ...(options?.limit && { limit: options.limit }),
       ...((!options?.mediaType || ['clips', 'all'].includes(options.mediaType)) && {
-        has_clip: true,
+        hasClip: true,
       }),
-      ...(options?.mediaType === 'snapshots' && { has_snapshot: true }),
+      ...(options?.mediaType === 'snapshots' && { hasSnapshot: true }),
     });
     query = new EventMediaQueries(queries);
   }

src/view.ts

@@ -6,7 +6,6 @@
 //  - TODO: Are there elements of ViewMedia (e.g. getEventCount) that should be moved into subclasses (e.g. a recording subclass).
 //  - TODO: In MediaQueriesBase, do we need to generic? Just have T be a MediaQuery?
 //  - TODO: Are areEventQueries and areRecordingQueries should be in a classifier to keep with the pattern used elsewhere.
-//  - TODO: Callers to the creation of new views for events/recordings need to dispatch events themselves when none are found.
 //  - TODO: In the viewer @click handlers should I use this.selected instead of calling carouselScrollPrevious()
 //  - TODO: Can _timelineClickHandler be an async method in timeline-core to improve cleanliness?
 //  - TODO: Can _timelineRangeChangedHandler be an async method in timeline-core to improve cleanliness?
@@ -124,7 +123,7 @@ export class MediaQueriesResults {
   protected _resultsTimestamp: Date | null = null;
   protected _selectedIndex: number | null = null;
 
-  constructor(results?: ViewMedia[], selectedIndex?: number) {
+  constructor(results?: ViewMedia[], selectedIndex?: number | null) {
     if (results) {
       this.setResults(results);
     }
@@ -177,8 +176,8 @@ export class MediaQueriesResults {
     return this._resultsTimestamp;
   }
 
-  public selectResult(index: number): MediaQueriesResults {
+  public selectResult(index: number | null): MediaQueriesResults {
-    if (this._results && index >= 0 && index < this._results.length) {
+    if (index === null || (this._results && index >= 0 && index < this._results.length)) {
       this._selectedIndex = index;
     }
     return this;