Add persistent car performance analytics
This commit is contained in:
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import type { CompanionDatabase } from "./database.js";
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import { collectCarTelemetry, type AdbConfig, type CarTelemetry } from "./adb.js";
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const SAMPLE_INTERVAL_MS = 10_000;
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const RAW_RETENTION_MS = 90 * 24 * 60 * 60 * 1_000;
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const ROLLUP_RETENTION_MS = 10 * 365 * 24 * 60 * 60 * 1_000;
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const MAX_RAW_SAMPLES = 800_000;
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const MAX_HOURLY_ROLLUPS = 88_000;
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const BATTERY_USABLE_KWH = 61.7;
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type StoredSample = {
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recordedAt: number;
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speedKph: number | null;
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wheelAngleDegrees: number | null;
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batteryPercent: number | null;
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rangeKm: number | null;
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batteryVoltage: number | null;
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totalConsumptionKwh: number | null;
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chargingStatus: number | null;
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chargingPowerKw: number | null;
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};
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export type TelemetryPeriod = "24h" | "7d" | "30d" | "1y" | "all";
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export type TelemetryHistoryPoint = {
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timestamp: number;
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speedKph: number | null;
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peakSpeedKph: number | null;
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batteryPercent: number | null;
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rangeKm: number | null;
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chargingPowerKw: number | null;
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};
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function value<T>(field: { available: true; value: T } | { available: false; reason: string }): T | null {
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return field.available ? field.value : null;
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}
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function finite(value_: unknown): number | null {
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return typeof value_ === "number" && Number.isFinite(value_) ? value_ : null;
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}
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function rowToStored(row: Record<string, unknown> | undefined): StoredSample | null {
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if (!row) return null;
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return {
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recordedAt: Number(row.recorded_at),
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speedKph: finite(row.speed_kph),
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wheelAngleDegrees: finite(row.wheel_angle_degrees),
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batteryPercent: finite(row.battery_percent),
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rangeKm: finite(row.range_km),
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batteryVoltage: finite(row.battery_voltage),
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totalConsumptionKwh: finite(row.total_consumption_kwh),
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chargingStatus: finite(row.charging_status),
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chargingPowerKw: finite(row.charging_power_kw)
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};
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}
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export class CarTelemetryStore {
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#samplesSincePrune = 0;
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constructor(private readonly database: CompanionDatabase) {}
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record(telemetry: CarTelemetry): StoredSample {
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const recordedAt = Date.parse(telemetry.collectedAt);
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const timestamp = Number.isFinite(recordedAt) ? recordedAt : Date.now();
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const previous = rowToStored(this.database
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.prepare("SELECT * FROM car_telemetry_samples ORDER BY recorded_at DESC LIMIT 1")
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.get() as Record<string, unknown> | undefined);
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const speedKph = value(telemetry.speedKph);
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const batteryPercent = value(telemetry.batteryPercent);
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const chargingStatus = value(telemetry.chargingStatus);
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const chargingPowerKw = this.#estimateChargingPower(timestamp, batteryPercent, chargingStatus);
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const sample: StoredSample = {
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recordedAt: timestamp,
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speedKph,
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wheelAngleDegrees: value(telemetry.wheelAngleDegrees),
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batteryPercent,
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rangeKm: value(telemetry.rangeKm),
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batteryVoltage: value(telemetry.batteryVoltage),
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totalConsumptionKwh: value(telemetry.totalConsumptionKwh),
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chargingStatus,
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chargingPowerKw
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};
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const deltaSeconds = previous ? Math.max(0, (timestamp - previous.recordedAt) / 1_000) : 0;
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const contiguous = deltaSeconds > 0 && deltaSeconds <= 60;
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const averageSpeed = contiguous && speedKph !== null && previous !== null && previous.speedKph !== null
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? (speedKph + previous.speedKph) / 2
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: speedKph ?? 0;
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const distanceKm = contiguous && averageSpeed > 1 ? averageSpeed * deltaSeconds / 3_600 : 0;
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const drivingSeconds = distanceKm > 0 ? deltaSeconds : 0;
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const charging = chargingStatus !== null && chargingStatus > 0;
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const wasCharging = previous !== null && previous.chargingStatus !== null && previous.chargingStatus > 0;
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const chargingSeconds = contiguous && charging ? deltaSeconds : 0;
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const chargeSession = charging && !wasCharging ? 1 : 0;
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const socDrop = contiguous && !charging && batteryPercent !== null && previous !== null && previous.batteryPercent !== null
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? Math.min(Math.max(previous.batteryPercent - batteryPercent, 0), 2)
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: 0;
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const transaction = this.database.transaction(() => {
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this.database.prepare(
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`INSERT OR REPLACE INTO car_telemetry_samples
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(recorded_at, speed_kph, wheel_angle_degrees, battery_percent, range_km,
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battery_voltage, total_consumption_kwh, charging_status, charging_power_kw)
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VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)`
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).run(
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sample.recordedAt,
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sample.speedKph,
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sample.wheelAngleDegrees,
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sample.batteryPercent,
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sample.rangeKm,
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sample.batteryVoltage,
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sample.totalConsumptionKwh,
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sample.chargingStatus,
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sample.chargingPowerKw
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);
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this.#updateRollup(sample, distanceKm, drivingSeconds, chargingSeconds);
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this.#updateStats(sample, distanceKm, drivingSeconds, chargingSeconds, chargeSession, socDrop);
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});
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transaction();
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this.#samplesSincePrune += 1;
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if (this.#samplesSincePrune >= 360) {
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this.prune(timestamp);
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this.#samplesSincePrune = 0;
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}
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return sample;
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}
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#estimateChargingPower(recordedAt: number, batteryPercent: number | null, chargingStatus: number | null): number | null {
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if (batteryPercent === null || chargingStatus === null || chargingStatus <= 0) return null;
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const baseline = this.database.prepare(
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`SELECT recorded_at, battery_percent FROM car_telemetry_samples
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WHERE recorded_at BETWEEN ? AND ? AND battery_percent IS NOT NULL
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ORDER BY recorded_at DESC LIMIT 1`
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).get(recordedAt - 10 * 60_000, recordedAt - 2 * 60_000) as { recorded_at: number; battery_percent: number } | undefined;
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if (!baseline) return null;
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const elapsedHours = (recordedAt - baseline.recorded_at) / 3_600_000;
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const socGain = batteryPercent - baseline.battery_percent;
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if (elapsedHours <= 0 || socGain < 0.2) return null;
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const estimate = (socGain / 100) * BATTERY_USABLE_KWH / elapsedHours;
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return estimate > 0 && estimate <= 350 ? Math.round(estimate * 10) / 10 : null;
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}
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#updateRollup(sample: StoredSample, distanceKm: number, drivingSeconds: number, chargingSeconds: number): void {
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const bucketStart = Math.floor(sample.recordedAt / 3_600_000) * 3_600_000;
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const speedCount = sample.speedKph === null ? 0 : 1;
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const socCount = sample.batteryPercent === null ? 0 : 1;
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const rangeCount = sample.rangeKm === null ? 0 : 1;
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const powerCount = sample.chargingPowerKw === null ? 0 : 1;
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this.database.prepare(
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`INSERT INTO car_telemetry_hourly
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(bucket_start, sample_count, speed_sum, speed_count, speed_max, soc_sum, soc_count, soc_min, soc_max,
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range_sum, range_count, range_max, charge_power_sum, charge_power_count, charge_power_max,
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distance_km, driving_seconds, charging_seconds)
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VALUES (?, 1, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
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ON CONFLICT(bucket_start) DO UPDATE SET
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sample_count = sample_count + 1,
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speed_sum = speed_sum + excluded.speed_sum,
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speed_count = speed_count + excluded.speed_count,
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speed_max = CASE WHEN excluded.speed_max IS NULL THEN speed_max WHEN speed_max IS NULL OR excluded.speed_max > speed_max THEN excluded.speed_max ELSE speed_max END,
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soc_sum = soc_sum + excluded.soc_sum,
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soc_count = soc_count + excluded.soc_count,
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soc_min = CASE WHEN excluded.soc_min IS NULL THEN soc_min WHEN soc_min IS NULL OR excluded.soc_min < soc_min THEN excluded.soc_min ELSE soc_min END,
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soc_max = CASE WHEN excluded.soc_max IS NULL THEN soc_max WHEN soc_max IS NULL OR excluded.soc_max > soc_max THEN excluded.soc_max ELSE soc_max END,
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range_sum = range_sum + excluded.range_sum,
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range_count = range_count + excluded.range_count,
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range_max = CASE WHEN excluded.range_max IS NULL THEN range_max WHEN range_max IS NULL OR excluded.range_max > range_max THEN excluded.range_max ELSE range_max END,
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charge_power_sum = charge_power_sum + excluded.charge_power_sum,
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charge_power_count = charge_power_count + excluded.charge_power_count,
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charge_power_max = CASE WHEN excluded.charge_power_max IS NULL THEN charge_power_max WHEN charge_power_max IS NULL OR excluded.charge_power_max > charge_power_max THEN excluded.charge_power_max ELSE charge_power_max END,
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distance_km = distance_km + excluded.distance_km,
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driving_seconds = driving_seconds + excluded.driving_seconds,
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charging_seconds = charging_seconds + excluded.charging_seconds`
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).run(
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bucketStart,
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sample.speedKph ?? 0,
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speedCount,
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sample.speedKph,
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sample.batteryPercent ?? 0,
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socCount,
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sample.batteryPercent,
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sample.batteryPercent,
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sample.rangeKm ?? 0,
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rangeCount,
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sample.rangeKm,
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sample.chargingPowerKw ?? 0,
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powerCount,
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sample.chargingPowerKw,
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distanceKm,
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drivingSeconds,
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chargingSeconds
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);
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}
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#updateStats(
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sample: StoredSample,
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distanceKm: number,
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drivingSeconds: number,
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chargingSeconds: number,
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chargeSession: number,
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socDrop: number
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): void {
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this.database.prepare(
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`UPDATE car_telemetry_stats SET
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first_sample_at = COALESCE(first_sample_at, ?),
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last_sample_at = ?,
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sample_count = sample_count + 1,
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peak_speed_at = CASE WHEN ? IS NOT NULL AND (peak_speed_kph IS NULL OR ? > peak_speed_kph) THEN ? ELSE peak_speed_at END,
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peak_speed_kph = CASE WHEN ? IS NOT NULL AND (peak_speed_kph IS NULL OR ? > peak_speed_kph) THEN ? ELSE peak_speed_kph END,
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peak_charging_power_at = CASE WHEN ? IS NOT NULL AND (peak_charging_power_kw IS NULL OR ? > peak_charging_power_kw) THEN ? ELSE peak_charging_power_at END,
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peak_charging_power_kw = CASE WHEN ? IS NOT NULL AND (peak_charging_power_kw IS NULL OR ? > peak_charging_power_kw) THEN ? ELSE peak_charging_power_kw END,
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max_observed_range_at = CASE WHEN ? IS NOT NULL AND (max_observed_range_km IS NULL OR ? > max_observed_range_km) THEN ? ELSE max_observed_range_at END,
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max_observed_range_km = CASE WHEN ? IS NOT NULL AND (max_observed_range_km IS NULL OR ? > max_observed_range_km) THEN ? ELSE max_observed_range_km END,
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tracked_distance_km = tracked_distance_km + ?,
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driving_seconds = driving_seconds + ?,
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charging_seconds = charging_seconds + ?,
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charge_sessions = charge_sessions + ?,
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soc_used_percent = soc_used_percent + ?
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WHERE id = 1`
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).run(
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sample.recordedAt,
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sample.recordedAt,
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sample.speedKph, sample.speedKph, sample.recordedAt,
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sample.speedKph, sample.speedKph, sample.speedKph,
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sample.chargingPowerKw, sample.chargingPowerKw, sample.recordedAt,
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sample.chargingPowerKw, sample.chargingPowerKw, sample.chargingPowerKw,
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sample.rangeKm, sample.rangeKm, sample.recordedAt,
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sample.rangeKm, sample.rangeKm, sample.rangeKm,
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distanceKm,
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drivingSeconds,
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chargingSeconds,
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chargeSession,
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socDrop
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);
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}
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prune(now = Date.now()): void {
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const transaction = this.database.transaction(() => {
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this.database.prepare("DELETE FROM car_telemetry_samples WHERE recorded_at < ?").run(now - RAW_RETENTION_MS);
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this.database.prepare(
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`DELETE FROM car_telemetry_samples WHERE recorded_at IN (
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SELECT recorded_at FROM car_telemetry_samples ORDER BY recorded_at DESC LIMIT -1 OFFSET ?
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)`
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).run(MAX_RAW_SAMPLES);
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this.database.prepare("DELETE FROM car_telemetry_hourly WHERE bucket_start < ?").run(now - ROLLUP_RETENTION_MS);
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this.database.prepare(
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`DELETE FROM car_telemetry_hourly WHERE bucket_start IN (
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SELECT bucket_start FROM car_telemetry_hourly ORDER BY bucket_start DESC LIMIT -1 OFFSET ?
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)`
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).run(MAX_HOURLY_ROLLUPS);
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});
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transaction();
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}
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overview() {
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const stats = this.database.prepare("SELECT * FROM car_telemetry_stats WHERE id = 1").get() as Record<string, number | null>;
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const latest = rowToStored(this.database.prepare("SELECT * FROM car_telemetry_samples ORDER BY recorded_at DESC LIMIT 1").get() as Record<string, unknown> | undefined);
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const storage = this.database.prepare(
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`SELECT
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(SELECT COUNT(*) FROM car_telemetry_samples) AS raw_samples,
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(SELECT MIN(recorded_at) FROM car_telemetry_samples) AS oldest_raw_at,
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(SELECT COUNT(*) FROM car_telemetry_hourly) AS hourly_rollups,
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(SELECT MIN(bucket_start) FROM car_telemetry_hourly) AS oldest_rollup_at`
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).get() as Record<string, number | null>;
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const trackedDistance = Number(stats.tracked_distance_km ?? 0);
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const drivingSeconds = Number(stats.driving_seconds ?? 0);
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const socUsed = Number(stats.soc_used_percent ?? 0);
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const ownRangeEstimate = trackedDistance >= 10 && socUsed >= 5 ? trackedDistance / socUsed * 100 : null;
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return {
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latest,
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records: {
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peakSpeedKph: finite(stats.peak_speed_kph),
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peakSpeedAt: finite(stats.peak_speed_at),
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peakChargingPowerKw: finite(stats.peak_charging_power_kw),
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peakChargingPowerAt: finite(stats.peak_charging_power_at),
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maxObservedRangeKm: finite(stats.max_observed_range_km),
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maxObservedRangeAt: finite(stats.max_observed_range_at)
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},
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lifetime: {
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firstSampleAt: finite(stats.first_sample_at),
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lastSampleAt: finite(stats.last_sample_at),
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sampleCount: Number(stats.sample_count ?? 0),
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trackedDistanceKm: trackedDistance,
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drivingSeconds,
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chargingSeconds: Number(stats.charging_seconds ?? 0),
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chargeSessions: Number(stats.charge_sessions ?? 0),
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socUsedPercent: socUsed,
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averageMovingSpeedKph: drivingSeconds > 0 ? trackedDistance / (drivingSeconds / 3_600) : null,
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ownRangeEstimateKm: ownRangeEstimate
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},
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storage: {
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rawSamples: Number(storage.raw_samples ?? 0),
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hourlyRollups: Number(storage.hourly_rollups ?? 0),
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oldestRawAt: finite(storage.oldest_raw_at),
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oldestRollupAt: finite(storage.oldest_rollup_at),
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estimatedBytes: Number(storage.raw_samples ?? 0) * 112 + Number(storage.hourly_rollups ?? 0) * 176,
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rawRetentionDays: 90,
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rollupRetentionYears: 10,
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rawSampleCap: MAX_RAW_SAMPLES
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}
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};
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}
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history(period: TelemetryPeriod): { period: TelemetryPeriod; points: TelemetryHistoryPoint[] } {
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const now = Date.now();
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const settings: Record<TelemetryPeriod, { duration: number; bucket: number; rollup: boolean }> = {
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"24h": { duration: 24 * 60 * 60_000, bucket: 5 * 60_000, rollup: false },
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"7d": { duration: 7 * 24 * 60 * 60_000, bucket: 30 * 60_000, rollup: false },
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"30d": { duration: 30 * 24 * 60 * 60_000, bucket: 2 * 60 * 60_000, rollup: false },
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"1y": { duration: 365 * 24 * 60 * 60_000, bucket: 24 * 60 * 60_000, rollup: true },
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all: { duration: ROLLUP_RETENTION_MS, bucket: 7 * 24 * 60 * 60_000, rollup: true }
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};
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const setting = settings[period];
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const from = now - setting.duration;
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const rows = setting.rollup
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? this.database.prepare(
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`SELECT CAST(bucket_start / ? AS INTEGER) * ? AS timestamp,
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CASE WHEN SUM(speed_count) > 0 THEN SUM(speed_sum) / SUM(speed_count) END AS speed_kph,
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MAX(speed_max) AS peak_speed_kph,
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CASE WHEN SUM(soc_count) > 0 THEN SUM(soc_sum) / SUM(soc_count) END AS battery_percent,
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CASE WHEN SUM(range_count) > 0 THEN SUM(range_sum) / SUM(range_count) END AS range_km,
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MAX(charge_power_max) AS charging_power_kw
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FROM car_telemetry_hourly WHERE bucket_start >= ? GROUP BY timestamp ORDER BY timestamp`
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).all(setting.bucket, setting.bucket, from)
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: this.database.prepare(
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`SELECT CAST(recorded_at / ? AS INTEGER) * ? AS timestamp,
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AVG(speed_kph) AS speed_kph, MAX(speed_kph) AS peak_speed_kph,
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AVG(battery_percent) AS battery_percent, AVG(range_km) AS range_km,
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MAX(charging_power_kw) AS charging_power_kw
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FROM car_telemetry_samples WHERE recorded_at >= ? GROUP BY timestamp ORDER BY timestamp`
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).all(setting.bucket, setting.bucket, from);
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return {
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period,
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points: (rows as Record<string, unknown>[]).map((row) => ({
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timestamp: Number(row.timestamp),
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speedKph: finite(row.speed_kph),
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peakSpeedKph: finite(row.peak_speed_kph),
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batteryPercent: finite(row.battery_percent),
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rangeKm: finite(row.range_km),
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chargingPowerKw: finite(row.charging_power_kw)
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}))
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};
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}
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}
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export class CarTelemetryRecorder {
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readonly store: CarTelemetryStore;
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#timer: NodeJS.Timeout | null = null;
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#pending: Promise<CarTelemetry> | null = null;
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#latest: CarTelemetry | null = null;
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#lastStoredAt = 0;
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constructor(database: CompanionDatabase, private readonly config: AdbConfig) {
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this.store = new CarTelemetryStore(database);
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}
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start(): void {
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if (!this.config.enabled || this.#timer) return;
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void this.readLive().catch(() => undefined);
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this.#timer = setInterval(() => void this.readLive().catch(() => undefined), SAMPLE_INTERVAL_MS);
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this.#timer.unref();
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}
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stop(): void {
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if (this.#timer) clearInterval(this.#timer);
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this.#timer = null;
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}
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async readLive(): Promise<CarTelemetry> {
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const latestAt = this.#latest ? Date.parse(this.#latest.collectedAt) : 0;
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if (this.#latest && Date.now() - latestAt < 1_500) return this.#latest;
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if (this.#pending) return this.#pending;
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this.#pending = collectCarTelemetry(this.config).then((telemetry) => {
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this.#latest = telemetry;
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const sampleAt = Date.parse(telemetry.collectedAt);
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if (sampleAt - this.#lastStoredAt >= SAMPLE_INTERVAL_MS - 1_000) {
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this.store.record(telemetry);
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this.#lastStoredAt = sampleAt;
|
||||
}
|
||||
return telemetry;
|
||||
}).finally(() => { this.#pending = null; });
|
||||
return this.#pending;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user