feat: Credit note.

src/containers/Sales/CreditNotes/CreditNoteForm/utils.js

@@ -0,0 +1,88 @@
+import React from 'react';
+import moment from 'moment';
+import intl from 'react-intl-universal';
+import { useFormikContext } from 'formik';
+import { Intent } from '@blueprintjs/core';
+import { omit } from 'lodash';
+
+import {
+  compose,
+  transformToForm,
+  repeatValue,
+  transactionNumber,
+  defaultFastFieldShouldUpdate,
+} from 'utils';
+import { AppToaster } from 'components';
+import {
+  updateItemsEntriesTotal,
+  ensureEntriesHaveEmptyLine,
+} from 'containers/Entries/utils';
+
+export const MIN_LINES_NUMBER = 4;
+
+// Default entry object.
+export const defaultCreditNoteEntry = {
+  index: 0,
+  item_id: '',
+  rate: '',
+  discount: '',
+  quantity: '',
+  description: '',
+  amount: '',
+};
+
+// Default credit note object.
+export const defaultCreditNote = {
+  customer_id: '',
+  invoice_date: moment(new Date()).format('YYYY-MM-DD'),
+  invoice_no: '',
+  invoice_no_manually: false,
+  reference_no: '',
+  invoice_message: '',
+  terms_conditions: '',
+  entries: [...repeatValue(defaultCreditNoteEntry, MIN_LINES_NUMBER)],
+};
+
+/**
+ * Transform credit note to initial values in edit mode.
+ */
+export function transformToEditForm(creditNote) {
+  const initialEntries = [
+    ...creditNote.entries.map((creditNote) => ({
+      ...transformToForm(creditNote, defaultCreditNoteEntry),
+    })),
+    ...repeatValue(
+      defaultCreditNoteEntry,
+      Math.max(MIN_LINES_NUMBER - creditNote.entries.length, 0),
+    ),
+  ];
+  const entries = compose(
+    ensureEntriesHaveEmptyLine(defaultCreditNoteEntry),
+    updateItemsEntriesTotal,
+  )(initialEntries);
+
+  return {
+    ...transformToForm(creditNote, defaultCreditNote),
+    entries,
+  };
+}
+
+/**
+ * Determines customer name field when should update.
+ */
+export const customerNameFieldShouldUpdate = (newProps, oldProps) => {
+  return (
+    newProps.customers !== oldProps.customers ||
+    defaultFastFieldShouldUpdate(newProps, oldProps)
+  );
+};
+
+/**
+ * Determines invoice entries field when should update.
+ */
+export const entriesFieldShouldUpdate = (newProps, oldProps) => {
+  return (
+    newProps.items !== oldProps.items ||
+    defaultFastFieldShouldUpdate(newProps, oldProps)
+  );
+};