Fetch metadata from engine.

src/camera/engine-factory.ts

@@ -62,6 +62,13 @@ export class CameraManagerEngineFactory {
       }
       output.get(engine)?.add(cameraID);
     }
-    return output;
+    return output.size ? output : null;
+  }
+
+  public getAllEngines(
+    cameras: Map<string, CameraConfig>,
+  ): CameraManagerEngine[] | null {
+    const engines = this.getEnginesForCameraIDs(cameras, new Set(cameras.keys()));
+    return engines ? [...engines.keys()] : null;
   }
 }

src/camera/engine.ts

@@ -5,6 +5,7 @@ import {
   DataQuery,
   EventQuery,
   EventQueryResultsMap,
+  MediaMetadata,
   PartialEventQuery,
   PartialRecordingQuery,
   PartialRecordingSegmentsQuery,
@@ -75,9 +76,7 @@ export interface CameraManagerEngine {
     favorite: boolean,
   ): Promise<void>;
 
-  getQueryResultMaxAge(
+  getQueryResultMaxAge(query: DataQuery): number | null;
-    query: DataQuery
-  ): number | null;
 
   getMediaSeekTime(
     hass: HomeAssistant,
@@ -85,4 +84,9 @@ export interface CameraManagerEngine {
     media: ViewMedia,
     target: Date,
   ): Promise<number | null>;
+
+  getMediaMetadata(
+    hass: HomeAssistant,
+    cameras: Map<string, CameraConfig>,
+  ): Promise<MediaMetadata | null>;
 }

src/camera/frigate/engine-frigate.ts

@@ -20,6 +20,7 @@ import {
   FrigateEventQueryResults,
   FrigateRecordingQueryResults,
   FrigateRecordingSegmentsQueryResults,
+  MediaMetadata,
   PartialEventQuery,
   PartialRecordingQuery,
   PartialRecordingSegmentsQuery,
@@ -36,6 +37,7 @@ import {
 import { FrigateRecording } from './types';
 import {
   getEvents,
+  getEventSummary,
   getRecordingSegments,
   getRecordingsSummary,
   NativeFrigateEventQuery,
@@ -44,7 +46,7 @@ import {
 } from './requests';
 import orderBy from 'lodash-es/orderBy';
 import throttle from 'lodash-es/throttle';
-import { runWhenIdleIfSupported } from '../../utils/basic';
+import { allPromises, runWhenIdleIfSupported } from '../../utils/basic';
 import { fromUnixTime } from 'date-fns';
 import { sum } from 'lodash-es';
 import { FrigateViewMediaClassifier } from './media-classifier';
@@ -214,10 +216,10 @@ export class FrigateCameraManagerEngine implements CameraManagerEngine {
 
   protected _buildInstanceToCameraIDMapFromQuery(
     cameras: Map<string, CameraConfig>,
-    query: DataQuery,
+    cameraIDs: Set<string>,
   ): Map<string, Set<string>> {
     const output: Map<string, Set<string>> = new Map();
-    for (const cameraID of query.cameraIDs) {
+    for (const cameraID of cameraIDs) {
       const cameraConfig = this._getQueryableCameraConfig(cameras, cameraID);
       const clientID = cameraConfig?.frigate.client_id;
       if (clientID) {
@@ -295,7 +297,10 @@ export class FrigateCameraManagerEngine implements CameraManagerEngine {
     // Frigate allows multiple cameras to be searched for events in a single
     // query. Break them down into groups of cameras per Frigate instance, then
     // query once per instance for all cameras in that instance.
-    const instances = this._buildInstanceToCameraIDMapFromQuery(cameras, query);
+    const instances = this._buildInstanceToCameraIDMapFromQuery(
+      cameras,
+      query.cameraIDs,
+    );
 
     await Promise.all(
       Array.from(instances.keys()).map((instanceID) =>
@@ -611,6 +616,56 @@ export class FrigateCameraManagerEngine implements CameraManagerEngine {
     return cameraConfig;
   }
 
+  public async getMediaMetadata(
+    hass: HomeAssistant,
+    cameras: Map<string, CameraConfig>,
+  ): Promise<MediaMetadata | null> {
+    const what: Set<string> = new Set();
+    const where: Set<string> = new Set();
+    const days: Set<string> = new Set();
+
+    const instances = this._buildInstanceToCameraIDMapFromQuery(
+      cameras,
+      new Set(cameras.keys()),
+    );
+
+    const processQuery = async (
+      instanceID: string,
+      cameraIDs: Set<string>,
+    ): Promise<void> => {
+      const cameraNames = this._getFrigateCameraNamesForCameraIDs(cameras, cameraIDs);
+      for (const entry of await getEventSummary(hass, instanceID)) {
+        if (!cameraNames.has(entry.camera)) {
+          // If this entry applies to a camera that *is* in this Frigate
+          // instance, but is *not* a configured camera in the card, skip it.
+          continue;
+        }
+        if (entry.label) {
+          what.add(entry.label);
+        }
+        if (entry.zones.length) {
+          entry.zones.forEach(where.add, where);
+        }
+        if (entry.day) {
+          days.add(entry.day);
+        }
+      }
+    };
+
+    await allPromises([...instances.entries()], ([instanceID, cameraIDs]) =>
+      processQuery(instanceID, cameraIDs),
+    );
+
+    if (!what.size && !where.size && !days.size) {
+      return null;
+    }
+    return {
+      ...(what.size && { what: what }),
+      ...(where.size && { where: where }),
+      ...(days.size && { days: days }),
+    };
+  }
+
   /**
    * Garbage collect recording segments that no longer feature in the recordings
    * returned by the Frigate backend.

src/camera/frigate/requests.ts

@@ -1,22 +1,29 @@
 import { HomeAssistant } from 'custom-card-helpers';
 import { localize } from '../../localize/localize';
-import {
+import { FrigateCardError, RecordingSegment } from '../../types';
-  FrigateCardError,
-  RecordingSegment,
-} from '../../types';
 import { homeAssistantWSRequest } from '../../utils/ha';
-import { FrigateEvent, frigateEventsSchema, recordingSegmentsSchema, RecordingSummary, recordingSummarySchema, RetainResult, retainResultSchema } from './types';
+import {
+  EventSummary,
+  eventSummarySchema,
+  FrigateEvent,
+  frigateEventsSchema,
+  recordingSegmentsSchema,
+  RecordingSummary,
+  recordingSummarySchema,
+  RetainResult,
+  retainResultSchema,
+} from './types';
 
 /**
  * Get the recordings summary. May throw.
  * @param hass The Home Assistant object.
- * @param client_id The Frigate client_id.
+ * @param clientID The Frigate clientID.
  * @param camera_name The Frigate camera name.
  * @returns A RecordingSummary object.
  */
 export const getRecordingsSummary = async (
   hass: HomeAssistant,
-  client_id: string,
+  clientID: string,
   camera_name: string,
 ): Promise<RecordingSummary> => {
   return await homeAssistantWSRequest(
@@ -24,7 +31,7 @@ export const getRecordingsSummary = async (
     recordingSummarySchema,
     {
       type: 'frigate/recordings/summary',
-      instance_id: client_id,
+      instance_id: clientID,
       camera: camera_name,
       timezone: Intl.DateTimeFormat().resolvedOptions().timeZone,
     },
@@ -63,19 +70,19 @@ export const getRecordingSegments = async (
 /**
  * Request that Frigate retain an event. May throw.
  * @param hass The HomeAssistant object.
- * @param client_id The Frigate client_id.
+ * @param clientID The Frigate clientID.
  * @param eventID The event ID to retain.
  * @param retain `true` to retain or `false` to unretain.
  */
 export async function retainEvent(
   hass: HomeAssistant,
-  client_id: string,
+  clientID: string,
   eventID: string,
   retain: boolean,
 ): Promise<void> {
   const retainRequest = {
     type: 'frigate/event/retain',
-    instance_id: client_id,
+    instance_id: clientID,
     event_id: eventID,
     retain: retain,
   };
@@ -126,3 +133,19 @@ export const getEvents = async (
     true,
   );
 };
+
+export const getEventSummary = async (
+  hass: HomeAssistant,
+  clientID: string,
+): Promise<EventSummary> => {
+  return await homeAssistantWSRequest(
+    hass,
+    eventSummarySchema,
+    {
+      type: 'frigate/events/summary',
+      instance_id: clientID,
+      timezone: Intl.DateTimeFormat().resolvedOptions().timeZone,
+    },
+    true,
+  );
+};

src/camera/frigate/types.ts

@@ -1,4 +1,9 @@
 import { z } from 'zod';
+import { dayToDate } from '../../utils/basic';
+
+const dayStringToDate = (arg: unknown): Date | unknown => {
+  return typeof arg === 'string' ? dayToDate(arg) : arg;
+};
 
 export const eventSchema = z.object({
   camera: z.string(),
@@ -25,11 +30,7 @@ const recordingSummaryHourSchema = z.object({
 
 export const recordingSummarySchema = z
   .object({
-    day: z.preprocess((arg) => {
+    day: z.preprocess(dayStringToDate, z.date()),
-      // Must provide the hour:minute:second on parsing or Javascript will
-      // assume *UTC* midnight.
-      return typeof arg === 'string' ? new Date(`${arg}T00:00:00`) : arg;
-    }, z.date()),
     events: z.number(),
     hours: recordingSummaryHourSchema.array(),
   })
@@ -54,4 +55,14 @@ export interface FrigateRecording {
   startTime: Date;
   endTime: Date;
   events: number;
-}
+}
+
+export const eventSummarySchema = z
+  .object({
+    camera: z.string(),
+    day: z.string(),
+    label: z.string(),
+    zones: z.string().array(),
+  })
+  .array();
+export type EventSummary = z.infer<typeof eventSummarySchema>;

src/camera/manager.ts

@@ -1,11 +1,12 @@
 import { HomeAssistant } from 'custom-card-helpers';
 import { CameraConfig } from '../types.js';
-import { arrayify, setify } from '../utils/basic.js';
+import { allPromises, arrayify, setify } from '../utils/basic.js';
 import {
   DataQuery,
   EventQuery,
   EventQueryResults,
   EventQueryResultsMap,
+  MediaMetadata,
   MediaQuery,
   PartialDataQuery,
   PartialEventQuery,
@@ -115,6 +116,45 @@ export class CameraManager {
     });
   }
 
+  public async getMediaMetadata(
+    hass: HomeAssistant,
+  ): Promise<MediaMetadata | null> {
+    const what: Set<string> = new Set();
+    const where: Set<string> = new Set();
+    const days: Set<string> = new Set();
+
+    const engines = this._engineFactory.getAllEngines(this._cameras);
+    if (!engines) {
+      return null;
+    }
+
+    const processMetadata = async (engine: CameraManagerEngine): Promise<void> => {
+      const engineMetadata = await engine.getMediaMetadata(hass, this._cameras);
+      if (engineMetadata) {
+        if (engineMetadata.what) {
+          engineMetadata.what.forEach(what.add, what);
+        }
+        if (engineMetadata.where) {
+          engineMetadata.where.forEach(where.add, where);
+        }
+        if (engineMetadata.days) {
+          engineMetadata.days.forEach(days.add, days);
+        }
+      }
+    }
+
+    await allPromises(engines, (engine) => processMetadata(engine));
+
+    if (!what.size && !where.size && !days.size) {
+      return null;
+    }
+    return {
+      ...(what.size && { what: what }),
+      ...(where.size && { where: where }),
+      ...(days.size && { days: days }),
+    }
+  }
+
   protected _generateDefaultQueries<PQT extends PartialDataQuery>(
     cameraIDs: string | Set<string>,
     partialQuery: PQT,

src/camera/types.ts

@@ -68,6 +68,12 @@ export type EventQueryResultsMap = ResultsMap<EventQuery>;
 export type RecordingQueryResultsMap = ResultsMap<RecordingQuery>;
 export type RecordingSegmentsQueryResultsMap = ResultsMap<RecordingSegmentsQuery>;
 
+export interface MediaMetadata {
+  where?: Set<string>;
+  what?: Set<string>;
+  days?: Set<string>;
+}
+
 // ===========
 // Event Query
 // ===========

src/components/media-filter.ts

@@ -11,6 +11,8 @@ import {
   html,
   LitElement,
   PropertyValues,
+  ReactiveController,
+  ReactiveControllerHost,
   TemplateResult,
 } from 'lit';
 import { customElement, property } from 'lit/decorators.js';
@@ -31,6 +33,11 @@ import './timeline-core.js';
 import { EventQuery, QueryType } from '../camera/types';
 import { EventMediaQueries } from '../view/media-queries';
 import { createViewForEvents } from '../utils/media-to-view.js';
+import { HomeAssistant } from 'custom-card-helpers';
+import { prettifyTitle } from '../utils/basic';
+import format from 'date-fns/format';
+import parse from 'date-fns/parse';
+import endOfMonth from 'date-fns/endOfMonth';
 
 @customElement('frigate-card-media-filter')
 export class FrigateCardMediaFilter extends LitElement {
@@ -50,6 +57,7 @@ export class FrigateCardMediaFilter extends LitElement {
   public mediaLimit?: number;
 
   protected _cameraOptions: ValueLabel<string>[] = [];
+  protected _mediaMetadataController?: MediaMetadataController;
 
   protected _convertWhenToDateRange(
     value?: MediaFilterCoreWhenSelection,
@@ -127,35 +135,23 @@ export class FrigateCardMediaFilter extends LitElement {
         }),
       );
     }
+
+    if (changedProps.has('cameraManager') && this.hass && this.cameraManager) {
+      this._mediaMetadataController = new MediaMetadataController(
+        this,
+        this.hass,
+        this.cameraManager,
+      );
+    }
   }
 
   protected render(): TemplateResult | void {
-    // TODO Replace with real custom when options
-    // TODO Replace with real custom what options
-    // TODO Replace with real custom where options
-    const whereOptions = [{ value: 'steps', label: 'Front Steps' }];
-
-    const whatOptions = [
-      { value: 'car', label: 'Car' },
-      { value: 'person', label: 'Person' },
-    ];
-
-    const whenOptions = [
-      {
-        value: {
-          selection: MediaFilterCoreWhen.Custom,
-          custom: { start: startOfToday(), end: endOfToday() },
-        },
-        label: 'December 2021',
-      },
-    ];
-
     return html` <frigate-card-media-filter-core
       .hass=${this.hass}
-      .whenOptions=${whenOptions}
+      .whenOptions=${this._mediaMetadataController?.whenOptions}
       .cameraOptions=${this._cameraOptions}
-      .whatOptions=${whatOptions}
+      .whatOptions=${this._mediaMetadataController?.whatOptions}
-      .whereOptions=${whereOptions}
+      .whereOptions=${this._mediaMetadataController?.whereOptions}
       @frigate-card:media-filter-core:change=${this._mediaFilterHandler.bind(this)}
     >
     </frigate-card-media-filter-core>`;
@@ -170,6 +166,65 @@ export class FrigateCardMediaFilter extends LitElement {
   }
 }
 
+export class MediaMetadataController implements ReactiveController {
+  protected _host: ReactiveControllerHost;
+  protected _hass: HomeAssistant;
+  protected _cameraManager: CameraManager;
+
+  public whenOptions: ValueLabel<MediaFilterCoreWhenSelection>[] = [];
+  public whatOptions: ValueLabel<string>[] = [];
+  public whereOptions: ValueLabel<string>[] = [];
+
+  constructor(
+    host: ReactiveControllerHost,
+    hass: HomeAssistant,
+    cameraManager: CameraManager,
+  ) {
+    this._host = host;
+    this._hass = hass;
+    this._cameraManager = cameraManager;
+    host.addController(this);
+  }
+
+  async hostConnected() {
+    const metadata = await this._cameraManager.getMediaMetadata(this._hass);
+    if (metadata) {
+      if (metadata.what) {
+        this.whatOptions = [...metadata.what]
+          .sort()
+          .map((what) => ({ value: what, label: prettifyTitle(what) }));
+      }
+      if (metadata.where) {
+        this.whereOptions = [...metadata.where]
+          .sort()
+          .map((where) => ({ value: where, label: prettifyTitle(where) }));
+      }
+      if (metadata.days) {
+        const yearMonths: Set<string> = new Set();
+        [...metadata.days].forEach((day) => {
+          // An efficient conversion: 2023-01-26 -> 2023-01
+          yearMonths.add(day.substring(0, 7));
+        });
+        const monthStarts: Date[] = [];
+        yearMonths.forEach((yearMonth) => {
+          monthStarts.push(parse(yearMonth, 'yyyy-MM', new Date()));
+        });
+        this.whenOptions = monthStarts
+          .sort()
+          .reverse()
+          .map((monthStart) => ({
+            label: format(monthStart, 'MMMM yyyy'),
+            value: {
+              selection: MediaFilterCoreWhen.Custom,
+              custom: { start: monthStart, end: endOfMonth(monthStart) },
+            },
+          }));
+      }
+      this._host.requestUpdate();
+    }
+  }
+}
+
 declare global {
   interface HTMLElementTagNameMap {
     'frigate-card-media-filter': FrigateCardMediaFilter;

src/utils/basic.ts

@@ -32,6 +32,7 @@ export function dispatchFrigateCardEvent<T>(
  * @param input The input Frigate (camera/label/zone) name.
  * @returns A prettified name.
  */
+export function prettifyTitle(input: string): string;
 export function prettifyTitle(input?: string): string | undefined {
   if (!input) {
     return undefined;
@@ -158,8 +159,24 @@ export function getDurationString(start: Date, end: Date): string {
 
 /**
  * For debug purposes only.
- * @param seconds 
+ * @param seconds
  */
 export const sleep = async (seconds: number) => {
-  await new Promise(r => setTimeout(r, seconds * 1000));
+  await new Promise((r) => setTimeout(r, seconds * 1000));
+};
+
+export const allPromises = async <T>(
+  items: T[],
+  func: (arg: T) => void,
+): Promise<void> => {
+  await Promise.all(Array.from(items).map((item) => func(item)));
+};
+
+/**
+ * Simple efficient YYYY-MM-DD -> date converter.
+ */
+export const dayToDate = (day: string): Date => {
+  // Must provide the hour:minute:second on parsing or Javascript will assume
+  // *UTC* midnight.
+  return new Date(`${day}T00:00:00`);
 }

src/view/view.ts

@@ -2,6 +2,7 @@
 //  - TODO: ts-prune https://camchenry.com/blog/deleting-dead-code-in-typescript
 //  - TODO: getRecordingTitle should use getCameraTitle but need hass.
 //  - TODO: Take MediaQueries wrappers out of the camera manager.
+//  - TODO: View a media in the gallery from September, then notice timeline missing the item.
 
 // Gallery:
 //  - TODO: Event gallery show_details default does not work.