From 347959b07d45ffa10fbe14dbf7da8872707c0ee5 Mon Sep 17 00:00:00 2001
From: Donald Kibet <chelashawdonald@yahoo.com>
Date: Tue, 28 May 2024 16:21:47 +0300
Subject: [PATCH] (feat) O3-3259 Add ability to deduct stock items while
 performing dispensing medication (#107)

* (chore) upgrade `@openmrs/esm-framework` version

* (feat) O3-3259 Add ability to deduct stock items while performing dispensing

* code reviews changes updated

* code reviews changes
---
 src/config-schema.ts                          |  6 ++
 src/forms/dispense-form.component.tsx         | 63 ++++++++++++++---
 .../stock-dispense.component.tsx              | 63 +++++++++++++++++
 src/forms/stock-dispense/stock.resource.tsx   | 67 +++++++++++++++++++
 src/location/location.resource.test.tsx       |  1 +
 src/types.ts                                  | 35 ++++++++++
 6 files changed, 226 insertions(+), 9 deletions(-)
 create mode 100644 src/forms/stock-dispense/stock-dispense.component.tsx
 create mode 100644 src/forms/stock-dispense/stock.resource.tsx

diff --git a/src/config-schema.ts b/src/config-schema.ts
index 0aa1126..9d32cd0 100644
--- a/src/config-schema.ts
+++ b/src/config-schema.ts
@@ -121,6 +121,11 @@ export const configSchema = {
       },
     },
   },
+  enableStockDispense: {
+    _type: Type.Boolean,
+    _description: 'Enable or disable stock deduction during the dispensing process. Requires the stock management module to be installed and configured.',
+    _default: false,
+},
 };
 
 export interface PharmacyConfig {
@@ -162,4 +167,5 @@ export interface PharmacyConfig {
       uuid: string;
     };
   };
+  enableStockDispense: boolean;
 }
diff --git a/src/forms/dispense-form.component.tsx b/src/forms/dispense-form.component.tsx
index 67c1203..3285f7c 100644
--- a/src/forms/dispense-form.component.tsx
+++ b/src/forms/dispense-form.component.tsx
@@ -11,7 +11,12 @@ import {
 import { Button, FormLabel, InlineLoading } from '@carbon/react';
 import styles from './forms.scss';
 import { closeOverlay } from '../hooks/useOverlay';
-import { type MedicationDispense, MedicationDispenseStatus, type MedicationRequestBundle } from '../types';
+import {
+  type MedicationDispense,
+  MedicationDispenseStatus,
+  type MedicationRequestBundle,
+  type InventoryItem,
+} from '../types';
 import { saveMedicationDispense } from '../medication-dispense/medication-dispense.resource';
 import MedicationDispenseReview from './medication-dispense-review.component';
 import {
@@ -22,6 +27,8 @@ import {
 } from '../utils';
 import { updateMedicationRequestFulfillerStatus } from '../medication-request/medication-request.resource';
 import { type PharmacyConfig } from '../config-schema';
+import StockDispense from './stock-dispense/stock-dispense.component';
+import { createStockDispenseRequestPayload, sendStockDispenseRequest } from './stock-dispense/stock.resource';
 
 interface DispenseFormProps {
   medicationDispense: MedicationDispense;
@@ -45,6 +52,9 @@ const DispenseForm: React.FC<DispenseFormProps> = ({
   const { patient, isLoading } = usePatient(patientUuid);
   const config = useConfig<PharmacyConfig>();
 
+  // Keep track of inventory item
+  const [inventoryItem, setInventoryItem] = useState<InventoryItem>();
+
   // Keep track of medication dispense payload
   const [medicationDispensePayload, setMedicationDispensePayload] = useState<MedicationDispense>();
 
@@ -78,6 +88,31 @@ const DispenseForm: React.FC<DispenseFormProps> = ({
           }
           return response;
         })
+        .then((response) => {
+          const { status } = response;
+          if ((config.enableStockDispense && status === 201) || status === 200) {
+            const stockDispenseRequestPayload = createStockDispenseRequestPayload(
+              inventoryItem,
+              patientUuid,
+              encounterUuid,
+              medicationDispensePayload,
+            );
+            sendStockDispenseRequest(stockDispenseRequestPayload, abortController).then(
+              () => {
+                showToast({
+                  critical: true,
+                  title: t('stockDispensed', 'Stock dispensed'),
+                  kind: 'success',
+                  description: t('stockDispensedSuccessfully', 'Stock dispensed successfully and batch level updated.'),
+                });
+              },
+              (error) => {
+                showToast({ title: 'Stock dispense error', kind: 'error', description: error?.message });
+              },
+            );
+          }
+          return response;
+        })
         .then(
           ({ status }) => {
             if (status === 201 || status === 200) {
@@ -134,7 +169,9 @@ const DispenseForm: React.FC<DispenseFormProps> = ({
   useEffect(() => setMedicationDispensePayload(medicationDispense), [medicationDispense]);
 
   // check is valid on any changes
-  useEffect(checkIsValid, [medicationDispensePayload, quantityRemaining]);
+  useEffect(checkIsValid, [medicationDispensePayload, quantityRemaining, inventoryItem]);
+
+  const isButtonDisabled = (config.enableStockDispense ? !inventoryItem : false) || !isValid || isSubmitting;
 
   const bannerState = useMemo(() => {
     if (patient) {
@@ -159,7 +196,6 @@ const DispenseForm: React.FC<DispenseFormProps> = ({
         )}
         {patient && <ExtensionSlot name="patient-header-slot" state={bannerState} />}
         <section className={styles.formGroup}>
-          {/* <span style={{ marginTop: "1rem" }}>1. {t("drug", "Drug")}</span>*/}
           <FormLabel>
             {t(
               config.dispenseBehavior.allowModifyingPrescription ? 'drugHelpText' : 'drugHelpTextNoEdit',
@@ -169,18 +205,27 @@ const DispenseForm: React.FC<DispenseFormProps> = ({
             )}
           </FormLabel>
           {medicationDispensePayload ? (
-            <MedicationDispenseReview
-              medicationDispense={medicationDispensePayload}
-              updateMedicationDispense={setMedicationDispensePayload}
-              quantityRemaining={quantityRemaining}
-            />
+            <div>
+              <MedicationDispenseReview
+                medicationDispense={medicationDispensePayload}
+                updateMedicationDispense={setMedicationDispensePayload}
+                quantityRemaining={quantityRemaining}
+              />
+              {config.enableStockDispense && (
+                <StockDispense
+                  inventoryItem={inventoryItem}
+                  medicationDispense={medicationDispense}
+                  updateInventoryItem={setInventoryItem}
+                />
+              )}
+            </div>
           ) : null}
         </section>
         <section className={styles.buttonGroup}>
           <Button disabled={isSubmitting} onClick={() => closeOverlay()} kind="secondary">
             {t('cancel', 'Cancel')}
           </Button>
-          <Button disabled={!isValid || isSubmitting} onClick={handleSubmit}>
+          <Button disabled={isButtonDisabled} onClick={handleSubmit}>
             {t(
               mode === 'enter' ? 'dispensePrescription' : 'saveChanges',
               mode === 'enter' ? 'Dispense prescription' : 'Save changes',
diff --git a/src/forms/stock-dispense/stock-dispense.component.tsx b/src/forms/stock-dispense/stock-dispense.component.tsx
new file mode 100644
index 0000000..2dd234b
--- /dev/null
+++ b/src/forms/stock-dispense/stock-dispense.component.tsx
@@ -0,0 +1,63 @@
+import React from 'react';
+import { ComboBox, InlineLoading, InlineNotification, Layer } from '@carbon/react';
+import { type MedicationDispense, type InventoryItem } from '../../types';
+import { useDispenseStock } from './stock.resource';
+import { formatDate } from '@openmrs/esm-framework';
+import { useTranslation } from 'react-i18next';
+
+type StockDispenseProps = {
+  medicationDispense: MedicationDispense;
+  updateInventoryItem: (inventoryItem: InventoryItem) => void;
+  inventoryItem: InventoryItem;
+};
+
+const StockDispense: React.FC<StockDispenseProps> = ({ medicationDispense, updateInventoryItem }) => {
+  const { t } = useTranslation();
+  const drugUuid = medicationDispense?.medicationReference?.reference?.split('/')[1];
+  const { inventoryItems, error, isLoading } = useDispenseStock(drugUuid);
+
+  const toStockDispense = (inventoryItems) => {
+    return t(
+      'stockDispenseDetails',
+      'Batch: {{batchNumber}} - Quantity: {{quantity}} ({{quantityUoM}}) - Expiry: {{expiration}}',
+      {
+        batchNumber: inventoryItems.batchNumber,
+        quantity: Math.floor(inventoryItems.quantity),
+        quantityUoM: inventoryItems.quantityUoM,
+        expiration: formatDate(new Date(inventoryItems.expiration)),
+      },
+    );
+  };
+
+  if (error) {
+    return (
+      <InlineNotification
+        aria-label="closes notification"
+        kind="error"
+        lowContrast={true}
+        statusIconDescription="notification"
+        subtitle={t('errorLoadingInventoryItems', 'Error fetching inventory items')}
+        title={t('error', 'Error')}
+      />
+    );
+  }
+
+  if (isLoading) {
+    return <InlineLoading description={t('loadingInventoryItems', 'Loading inventory items...')} />;
+  }
+
+  return (
+    <Layer>
+      <ComboBox
+        id="stockDispense"
+        items={inventoryItems}
+        onChange={({ selectedItem }) => updateInventoryItem(selectedItem)}
+        itemToString={(item) => (item ? toStockDispense(item) : '')}
+        titleText={t('stockDispense', 'Stock Dispense')}
+        placeholder={t('selectStockDispense', 'Select stock to dispense from')}
+      />
+    </Layer>
+  );
+};
+
+export default StockDispense;
diff --git a/src/forms/stock-dispense/stock.resource.tsx b/src/forms/stock-dispense/stock.resource.tsx
new file mode 100644
index 0000000..ec73a00
--- /dev/null
+++ b/src/forms/stock-dispense/stock.resource.tsx
@@ -0,0 +1,67 @@
+import useSWR from 'swr';
+import { openmrsFetch, useSession } from '@openmrs/esm-framework';
+import { type StockDispenseRequest, type InventoryItem, type MedicationDispense } from '../../types';
+import { getUuidFromReference } from '../../utils';
+
+//TODO: Add configuration to retrieve the stock dispense endpoint
+// For stock dispense to work, stock management module should be installed and configured
+/**
+ * Fetches the inventory items for a given drug UUID.
+ *
+ * @param {string} drugUuid - The UUID of the drug.
+ * @returns {Array} - The inventory items.
+ */
+export const useDispenseStock = (drugUuid: string) => {
+  const session = useSession();
+  const url = `/ws/rest/v1/stockmanagement/stockiteminventory?v=default&totalCount=true&drugUuid=${drugUuid}&includeBatchNo=true&groupBy=LocationStockItemBatchNo&dispenseLocationUuid=${session?.sessionLocation?.uuid}&includeStrength=1&includeConceptRefIds=1&emptyBatch=1&emptyBatchLocationUuid=${session?.sessionLocation?.uuid}&dispenseAtLocation=1`;
+  const { data, error, isLoading } = useSWR<{ data: { results: Array<InventoryItem> } }>(url, openmrsFetch);
+  return { inventoryItems: data?.data?.results ?? [], error, isLoading };
+};
+
+/**
+ * Sends a POST request to the inventory dispense endpoint with the provided stock dispense request.
+ *
+ * @param {AbortController} abortController - The AbortController used to cancel the request.
+ * @returns {Promise<Response>} - A Promise that resolves to the response of the POST request.
+ */
+export async function sendStockDispenseRequest(
+  stockDispenseRequest,
+  abortController: AbortController,
+): Promise<Response> {
+  const url = '/ws/rest/v1/stockmanagement/dispenserequest';
+  return await openmrsFetch(url, {
+    method: 'POST',
+    signal: abortController.signal,
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify({ dispenseItems: [stockDispenseRequest] }),
+  });
+}
+
+/**
+ * Creates a stock dispense request payload.
+ *
+ * @param inventoryItem - The inventory item to dispense.
+ * @param patientUuid - The UUID of the patient.
+ * @param encounterUuid - The UUID of the encounter.
+ * @param medicationDispensePayload - The medication dispense payload.
+ * @returns The stock dispense request payload.
+ */
+export const createStockDispenseRequestPayload = (
+  inventoryItem: InventoryItem,
+  patientUuid: string,
+  encounterUuid: string,
+  medicationDispensePayload: MedicationDispense,
+): StockDispenseRequest => {
+  return {
+    dispenseLocation: inventoryItem.locationUuid,
+    patient: patientUuid,
+    order: getUuidFromReference(medicationDispensePayload.authorizingPrescription[0].reference),
+    encounter: encounterUuid,
+    stockItem: inventoryItem?.stockItemUuid,
+    stockBatch: inventoryItem.stockBatchUuid,
+    stockItemPackagingUOM: inventoryItem.quantityUoMUuid,
+    quantity: medicationDispensePayload.quantity.value,
+  };
+};
diff --git a/src/location/location.resource.test.tsx b/src/location/location.resource.test.tsx
index 30b93cc..21ad222 100644
--- a/src/location/location.resource.test.tsx
+++ b/src/location/location.resource.test.tsx
@@ -41,6 +41,7 @@ const pharmacyConfig: PharmacyConfig = {
     substitutionReason: { uuid: '' },
     substitutionType: { uuid: '' },
   },
+  enableStockDispense: false,
 };
 
 describe('Location Resource tests', () => {
diff --git a/src/types.ts b/src/types.ts
index 4e43d72..b73ef30 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -475,3 +475,38 @@ export interface ValueSet {
     ];
   };
 }
+
+export type InventoryItem = {
+  partyUuid: string;
+  locationUuid: string;
+  partyName: string;
+  stockItemUuid: string | null;
+  drugId: string | null;
+  drugUuid: string | null;
+  drugStrength: string | null;
+  conceptId: string | null;
+  conceptUuid: string | null;
+  stockBatchUuid: string;
+  batchNumber: string;
+  quantity: number;
+  quantityUoM: string;
+  quantityFactor: number;
+  quantityUoMUuid: string;
+  expiration: string;
+  commonName: string | null;
+  acronym: string | null;
+  drugName: string | null;
+  conceptName: string | null;
+  resourceVersion: string;
+};
+
+export type StockDispenseRequest = {
+  dispenseLocation: string;
+  patient: string;
+  order: string;
+  encounter: string;
+  stockItem: string;
+  stockBatch: string;
+  stockItemPackagingUOM: string;
+  quantity: number;
+};