Medplum

// SPDX-FileCopyrightText: Copyright Orangebot, Inc. and Medplum contributors // SPDX-License-Identifier: Apache-2.0 import { allOk, evalFhirPathTyped, toJsBoolean, toTypedValue } from '@medplum/core'; import type { FhirRequest, FhirResponse } from '@medplum/fhir-router'; import type { ChargeItem, ChargeItemDefinition, Money, Reference } from '@medplum/fhirtypes'; import { getAuthenticatedContext } from '../../context'; import { getOperationDefinition } from './definitions'; import { parseInputParameters } from './utils/parameters'; const operation = getOperationDefinition('ChargeItemDefinition', 'apply'); interface ChargeItemDefinitionParameters { readonly chargeItem: Reference<ChargeItem>; } /** * Handles a ChargeItemDefinition $apply operation. * This operation applies a ChargeItemDefinition resource to a specific context, * often including a patient, encounter, or other relevant resources. * * See: https://www.hl7.org/fhir/chargeitemdefinition-operation-apply.html * @param req - The FHIR request. * @returns The FHIR response. */ export async function chargeItemDefinitionApplyHandler(req: FhirRequest): Promise<FhirResponse> { const ctx = getAuthenticatedContext(); const { id } = req.params; const chargeItemDefinition: ChargeItemDefinition = await ctx.repo.readResource<ChargeItemDefinition>( 'ChargeItemDefinition', id ); const params = parseInputParameters<ChargeItemDefinitionParameters>(operation, req); const inputChargeItemRef = params.chargeItem; const inputChargeItem = await ctx.repo.readReference<ChargeItem>(inputChargeItemRef); const updatedChargeItem: ChargeItem = { ...inputChargeItem, }; if (chargeItemDefinition.propertyGroup) { for (const group of chargeItemDefinition.propertyGroup) { if (group.priceComponent && group.priceComponent.length > 0) { const basePriceComp = group.priceComponent.find((pc) => pc.type === 'base'); if (basePriceComp?.amount) { updatedChargeItem.priceOverride = basePriceComp.amount; break; } } } } if (chargeItemDefinition.propertyGroup) { let basePrice: Money | undefined; // First pass: Find base price for (const group of chargeItemDefinition.propertyGroup) { let isGroupApplicable = true; if (group.applicability && group.applicability.length > 0) { for (const condition of group.applicability) { if (condition.expression) { const value = toTypedValue(updatedChargeItem); const result = evalFhirPathTyped(condition.expression, [value], { '%resource': value }); isGroupApplicable = toJsBoolean(result); } } } if (!isGroupApplicable) { continue; } if (group.priceComponent && group.priceComponent.length > 0) { const basePriceComp = group.priceComponent.find((pc) => pc.type === 'base'); if (basePriceComp?.amount) { basePrice = { ...basePriceComp.amount }; break; } } } // Second pass: Apply all modifiers if (basePrice?.value !== undefined) { const finalPrice: Money = { ...basePrice }; for (const group of chargeItemDefinition.propertyGroup) { let isGroupApplicable = true; if (group.applicability && group.applicability.length > 0) { for (const condition of group.applicability) { if (condition.expression) { const value = toTypedValue(updatedChargeItem); const result = evalFhirPathTyped(condition.expression, [value], { '%resource': value }); isGroupApplicable = toJsBoolean(result); } } } if (!isGroupApplicable) { continue; } if (group.priceComponent) { for (const component of group.priceComponent) { if (component.type === 'base') { continue; } if (component.type === 'surcharge') { if (component.amount?.value !== undefined && finalPrice.value !== undefined) { finalPrice.value += component.amount.value; } else if ( component.factor !== undefined && basePrice.value !== undefined && finalPrice.value !== undefined ) { finalPrice.value += basePrice.value * component.factor; } } if (component.type === 'discount') { if (component.amount?.value !== undefined && finalPrice.value !== undefined) { finalPrice.value -= component.amount.value; } else if ( component.factor !== undefined && basePrice.value !== undefined && finalPrice.value !== undefined ) { finalPrice.value -= basePrice.value * component.factor; } } } } } updatedChargeItem.priceOverride = finalPrice; } } const result = await ctx.repo.updateResource<ChargeItem>(updatedChargeItem); return [allOk, result]; }