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import {
type IActivity,
type IEither,
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 = 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(this.check))
.peek(TraceUtil.promiseify((h) =>
h.get().fold((err) => {
if (err) {
h.trace.trace(healthCheckMetric.failure);
h.trace.addTrace(LogLevel.ERROR).trace(`${err}`);
return;
}
h.trace.trace(healthCheckMetric.success);
})
))
.map(TraceUtil.promiseify((h) =>
h.get()
.mapBoth(
() => "oh no, i need to eat more vegetables (｡•́︿•̀｡)...",
() => "think im healthy!! (✿˘◡˘) ready to do work~",
)
.fold((errMsg, okMsg) =>
new JsonResponse(
req,
errMsg ?? okMsg,
{ status: errMsg ? 500 : 200 },
)
)
))
.get();
}
}
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