incr: update currency display

fyo/model/doc.ts

@@ -191,7 +191,6 @@ export class Doc extends Observable<DocValue | Doc[]> {
     if (typeof fieldname === 'object') {
       return await this.setMultiple(fieldname as DocValueMap);
     }
-    console.log(fieldname, value);
 
     if (!this._canSet(fieldname, value)) {
       return false;

fyo/models/SystemSettings.ts

@@ -7,6 +7,16 @@ import { SelectOption } from 'schemas/types';
 import { getCountryInfo } from 'utils/misc';
 
 export default class SystemSettings extends Doc {
+  dateFormat?: string;
+  locale?: string;
+  displayPrecision?: number;
+  internalPrecision?: number;
+  hideGetStarted?: boolean;
+  countryCode?: string;
+  currency?: string;
+  version?: string;
+  instanceId?: string;
+
   validations: ValidationMap = {
     async displayPrecision(value: DocValue) {
       if ((value as number) >= 0 && (value as number) <= 9) {

fyo/utils/format.ts

@@ -70,7 +70,7 @@ function formatCurrency(
   doc: Doc | null,
   fyo: Fyo
 ): string {
-  const currency = getCurrency(field, doc, fyo);
+  const currency = getCurrency(value as Money, field, doc, fyo);
 
   let valueString;
   try {
@@ -128,7 +128,20 @@ function getNumberFormatter(fyo: Fyo) {
   }));
 }
 
-function getCurrency(field: Field, doc: Doc | null, fyo: Fyo): string {
+function getCurrency(
+  value: Money,
+  field: Field,
+  doc: Doc | null,
+  fyo: Fyo
+): string {
+  const currency = value?.getCurrency?.();
+  const defaultCurrency =
+    fyo.singles.SystemSettings?.currency ?? DEFAULT_CURRENCY;
+
+  if (currency && currency !== defaultCurrency) {
+    return currency;
+  }
+
   let getCurrency = doc?.getCurrencies?.[field.fieldname];
   if (getCurrency !== undefined) {
     return getCurrency();
@@ -139,7 +152,7 @@ function getCurrency(field: Field, doc: Doc | null, fyo: Fyo): string {
     return getCurrency();
   }
 
-  return (fyo.singles.SystemSettings?.currency as string) ?? DEFAULT_CURRENCY;
+  return defaultCurrency;
 }
 
 function getField(df: string | Field): Field {

models/baseModels/Invoice/Invoice.ts

@@ -1,11 +1,20 @@
-import { DocValue } from 'fyo/core/types';
+import { Fyo } from 'fyo';
+import { DocValue, DocValueMap } from 'fyo/core/types';
 import { Doc } from 'fyo/model/doc';
-import { DefaultMap, FiltersMap, FormulaMap, HiddenMap } from 'fyo/model/types';
+import {
+  CurrenciesMap,
+  DefaultMap,
+  FiltersMap,
+  FormulaMap,
+  HiddenMap
+} from 'fyo/model/types';
+import { DEFAULT_CURRENCY } from 'fyo/utils/consts';
 import { ValidationError } from 'fyo/utils/errors';
 import { getExchangeRate } from 'models/helpers';
 import { Transactional } from 'models/Transactional/Transactional';
 import { ModelNameEnum } from 'models/types';
 import { Money } from 'pesa';
+import { FieldTypeEnum, Schema } from 'schemas/types';
 import { getIsNullOrUndef } from 'utils';
 import { InvoiceItem } from '../InvoiceItem/InvoiceItem';
 import { Party } from '../Party/Party';
@@ -50,6 +59,11 @@ export abstract class Invoice extends Transactional {
     return this.fyo.singles.SystemSettings!.currency !== this.currency;
   }
 
+  constructor(schema: Schema, data: DocValueMap, fyo: Fyo) {
+    super(schema, data, fyo);
+    this._setGetCurrencies();
+  }
+
   async validate() {
     await super.validate();
     if (
@@ -363,4 +377,22 @@ export abstract class Invoice extends Transactional {
       role: doc.isSales ? 'Customer' : 'Supplier',
     }),
   };
+
+  getCurrencies: CurrenciesMap = {};
+  _getCurrency() {
+    if (this.exchangeRate === 1) {
+      return this.fyo.singles.SystemSettings?.currency ?? DEFAULT_CURRENCY;
+    }
+
+    return this.currency ?? DEFAULT_CURRENCY;
+  }
+  _setGetCurrencies() {
+    const currencyFields = this.schema.fields.filter(
+      ({ fieldtype }) => fieldtype === FieldTypeEnum.Currency
+    );
+
+    for (const { fieldname } of currencyFields) {
+      this.getCurrencies[fieldname] = this._getCurrency.bind(this);
+    }
+  }
 }

models/baseModels/InvoiceItem/InvoiceItem.ts

@@ -1,21 +1,24 @@
-import { DocValue } from 'fyo/core/types';
+import { Fyo } from 'fyo';
+import { DocValue, DocValueMap } from 'fyo/core/types';
 import { Doc } from 'fyo/model/doc';
 import {
+  CurrenciesMap,
   FiltersMap,
   FormulaMap,
   HiddenMap,
   ValidationMap
 } from 'fyo/model/types';
+import { DEFAULT_CURRENCY } from 'fyo/utils/consts';
 import { ValidationError } from 'fyo/utils/errors';
 import { ModelNameEnum } from 'models/types';
 import { Money } from 'pesa';
+import { FieldTypeEnum, Schema } from 'schemas/types';
 import { Invoice } from '../Invoice/Invoice';
 
 export abstract class InvoiceItem extends Doc {
   account?: string;
   amount?: Money;
   baseAmount?: Money;
-  exchangeRate?: number;
   parentdoc?: Invoice;
   rate?: Money;
   quantity?: number;
@@ -39,6 +42,23 @@ export abstract class InvoiceItem extends Doc {
     return !!this.fyo.singles?.AccountingSettings?.enableDiscounting;
   }
 
+  get currency() {
+    return this.parentdoc?.currency ?? DEFAULT_CURRENCY;
+  }
+
+  get exchangeRate() {
+    return this.parentdoc?.exchangeRate ?? 1;
+  }
+
+  get isMultiCurrency() {
+    return this.parentdoc?.isMultiCurrency ?? false;
+  }
+
+  constructor(schema: Schema, data: DocValueMap, fyo: Fyo) {
+    super(schema, data, fyo);
+    this._setGetCurrencies();
+  }
+
   async getTotalTaxRate(): Promise<number> {
     if (!this.tax) {
       return 0;
@@ -338,6 +358,24 @@ export abstract class InvoiceItem extends Doc {
       return { for: doc.isSales ? 'Sales' : 'Purchases' };
     },
   };
+
+  getCurrencies: CurrenciesMap = {};
+  _getCurrency() {
+    if (this.exchangeRate === 1) {
+      return this.fyo.singles.SystemSettings?.currency ?? DEFAULT_CURRENCY;
+    }
+
+    return this.currency;
+  }
+  _setGetCurrencies() {
+    const currencyFields = this.schema.fields.filter(
+      ({ fieldtype }) => fieldtype === FieldTypeEnum.Currency
+    );
+
+    for (const { fieldname } of currencyFields) {
+      this.getCurrencies[fieldname] = this._getCurrency.bind(this);
+    }
+  }
 }
 
 function getDiscountedTotalBeforeTaxation(

src/pages/InvoiceForm.vue

@@ -390,7 +390,6 @@ export default {
     }
   },
   methods: {
-    log: console.log,
     routeTo,
     toggleInvoiceSettings() {
       if (!this.schemaName) {