@lotto24-angular/imports-orchestrator
Version:
Orchestrate dynamically imported components in Angular applications
51 lines • 6.72 kB
JavaScript
import { importsOrchestratorFeature, ImportsOrchestratorFeatureKind, } from './internal';
import { IMPORTS_ORCHESTRATOR_FEATURE_CONCURRENCY } from '../internal';
export function withConcurrencyRelativeToDownlinkSpeed(max = 4, min = 1) {
const providers = [
{
provide: IMPORTS_ORCHESTRATOR_FEATURE_CONCURRENCY,
useValue: downlinkToConcurrencyFn(max, min),
},
];
return importsOrchestratorFeature(ImportsOrchestratorFeatureKind.Concurrency, providers);
}
/**
* @param onUpdateConcurrencyFn called when queue processor updates concurrency;
*/
export function withConcurrencyUpdateFn(onUpdateConcurrencyFn) {
const providers = [
{
provide: IMPORTS_ORCHESTRATOR_FEATURE_CONCURRENCY,
useValue: onUpdateConcurrencyFn,
},
];
return importsOrchestratorFeature(ImportsOrchestratorFeatureKind.Concurrency, providers);
}
export function withConcurrencyStatic(value) {
const providers = [
{
provide: IMPORTS_ORCHESTRATOR_FEATURE_CONCURRENCY,
useValue: value,
},
];
return importsOrchestratorFeature(ImportsOrchestratorFeatureKind.Concurrency, providers);
}
function downlinkToConcurrencyFn(max, min = 1) {
return () => {
const downlink = navigator.connection?.downlink ?? 10;
if (downlink < 1) {
return min;
}
else if (downlink < 2) {
return Math.max(min, Math.floor(min + (max - min) / 4));
}
else if (downlink < 4) {
return Math.max(min, Math.floor(min + (max - min) / 2));
}
else if (downlink < 8) {
return Math.max(min, Math.floor(min + (max - min) / 1.5));
}
return max;
};
}
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