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import {
type IActivity,
type IEither,
IMetric,
type ITraceable,
JsonResponse,
LogLevel,
type Mapper,
Metric,
type PenguenoRequest,
type ServerTrace,
TraceUtil,
} from '@emprespresso/pengueno';
export enum HealthCheckInput {
CHECK,
}
export enum HealthCheckOutput {
YAASSSLAYQUEEN,
}
export interface IHealthCheckActivity {
checkHealth: IActivity;
}
const healthCheckMetric: IMetric = Metric.fromName('Health');
export interface HealthChecker
extends Mapper<ITraceable<HealthCheckInput, ServerTrace>, Promise<IEither<Error, HealthCheckOutput>>> {}
export class HealthCheckActivityImpl implements IHealthCheckActivity {
constructor(private readonly check: HealthChecker) {}
public checkHealth(req: ITraceable<PenguenoRequest, ServerTrace>) {
return req
.bimap(TraceUtil.withFunctionTrace(this.checkHealth))
.bimap(TraceUtil.withMetricTrace(healthCheckMetric))
.flatMap((r) => r.move(HealthCheckInput.CHECK).map((input) => this.check(input)))
.peek(
TraceUtil.promiseify((h) =>
h.get().fold(({ isLeft, value }) => {
if (!isLeft) {
h.trace.trace(healthCheckMetric.success);
return;
}
h.trace.trace(healthCheckMetric.failure);
h.trace.addTrace(LogLevel.ERROR).trace(value);
}),
),
)
.map(
TraceUtil.promiseify((h) =>
h
.get()
.mapBoth(
() => 'oh no, i need to eat more vegetables (｡•́︿•̀｡)...',
() => 'think im healthy!! (✿˘◡˘) ready to do work~',
)
.fold(
({ isLeft, value: message }) =>
new JsonResponse(req, message, {
status: isLeft ? 500 : 200,
}),
),
),
)
.get();
}
}
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