daniel-c-harvey
c084efa78e
Mint a first-party localStorage anonId, thread it onto play/share beacons, persist it via EventController, and add all-time distinct-listener counts (site/track/release). Storage columns + indexes already existed from 16.1.
53 lines
2.4 KiB
C#
53 lines
2.4 KiB
C#
using System.Text.Json;
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using System.Text.Json.Serialization;
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using DeepDrftModels.DTOs;
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using DeepDrftModels.Enums;
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using Microsoft.AspNetCore.Components;
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namespace DeepDrftPublic.Client.Services;
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/// <summary>
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/// Production <see cref="IPlayEventSink"/> (Phase 16 §2.2): serializes the play classification and fires
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/// it via <c>navigator.sendBeacon</c> to the proxied <c>api/event/play</c> route. Fire-and-forget by
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/// design — <see cref="IPlayEventSink.EmitPlay"/> is synchronous (it is called from the player's close
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/// path and the unload handler, neither of which can await), so the beacon is dispatched without
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/// awaiting and its failure is irrelevant. The current <c>anonId</c> (wave 16.3) is read synchronously
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/// from the warmed <see cref="IAnonIdProvider"/> cache and omitted when null (storage unavailable / not
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/// yet warmed) — an anonId-less play still counts, it just doesn't contribute to the listener tally.
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/// </summary>
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public sealed class BeaconPlayEventSink : IPlayEventSink
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{
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// Omit a null anonId from the wire payload (§2.2 — "omitted entirely" when absent) rather than
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// sending "anonId":null. The API treats absent and null identically, so this is cosmetic minimalism;
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// it does not change the integer enum encoding the 16.1 contract already relies on.
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private static readonly JsonSerializerOptions BeaconJson =
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new() { DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull };
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private readonly BeaconInterop _beacon;
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private readonly IAnonIdProvider _anonId;
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private readonly string _playUrl;
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public BeaconPlayEventSink(BeaconInterop beacon, IAnonIdProvider anonId, NavigationManager navigation)
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{
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_beacon = beacon;
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_anonId = anonId;
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// The WASM client posts to its own host, which proxies to DeepDrftAPI. BaseUri carries a
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// trailing slash; the route does not lead with one.
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_playUrl = $"{navigation.BaseUri}api/event/play";
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}
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public void EmitPlay(string trackEntryKey, PlayBucket bucket)
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{
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var json = JsonSerializer.Serialize(new PlayEventDto
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{
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TrackEntryKey = trackEntryKey,
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Bucket = bucket,
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AnonId = _anonId.Current,
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}, BeaconJson);
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// Fire-and-forget: do not await. The beacon survives unload; the C# task may not, and we do not
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// act on the result either way.
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_ = _beacon.SendAsync(_playUrl, json);
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}
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}
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