[postal-savings-rs] Add fetchExchangeRates

zenmoney · Apr 23, 2024 · c112900 · c112900
1 parent 67a8dde
commit c112900
Show file tree

Hide file tree

Showing 5 changed files with 207 additions and 7 deletions.
diff --git a/src/plugins/postal-savings-rs/__tests__/converters/transactions/exchangeRates.test.ts b/src/plugins/postal-savings-rs/__tests__/converters/transactions/exchangeRates.test.ts
@@ -0,0 +1,158 @@
+import { convertExchangeRates } from '../../../converters'
+
+const input = `
+<tr>
+            <td align="center" colspan="9">E- BANKING EXCHANGE RATE LIST NO.: 66<br></br>APPLICABLE AS AT: 05.04.2024.</td>
+          </tr>
+          <tr>
+            <td align="center" width="5%" rowspan="2">Currency code</td>
+            <td align="center" width="5%" rowspan="2">Currency designation</td>
+            <td align="center" width="15%" rowspan="2">Country</td>       
+            <td align="center" width="10%" rowspan="2">Unit</td>
+            <td align="center" colspan="3" width="30%">For foreign exchange</td>            
+            <td align="center" colspan="2" width="20%">For foreign cash</td>
+          </tr><tr>
+            <td align="center" width="12%">Buying exchange rate</td>
+<td align="center" width="12%">Middle exchange rate</td>
+            <td align="center" width="12%">Selling exchange rate</td>                 
+            <td align="center" width="12%">Buying exchange rate</td>
+            <td align="center" width="12%">Selling exchange rate</td>
+          </tr>
+
+<tr valign="top">
+<td align="center">978<br></br></td>
+<td align="center">EUR<br></br></td>
+<td align="left"><img src='../slike2/EUR.gif' height="11" width="16"/>&nbsp;E M U          <br></br></td>
+<td align="center">  1<br></br></td>
+<td align="center">        116.7883<br></br></td>
+<td align="center">        117.1397<br></br></td>
+<td align="center">        117.4911<br></br></td>
+<td align="center">        116.7883<br></br></td>
+<td align="center">        117.6083<br></br></td>
+</tr>
+
+<tr valign="top">
+<td align="center">036<br></br></td>
+<td align="center">AUD<br></br></td>
+<td align="left"><img src='../slike2/AUD.gif' height="11" width="16"/>&nbsp;AUSTRALIJA     <br></br></td>
+<td align="center">  1<br></br></td>
+<td align="center">         70.0520<br></br></td>
+<td align="center">         71.1188<br></br></td>
+<td align="center">         72.1856<br></br></td>
+<td align="center">         70.0520<br></br></td>
+<td align="center">         72.1856<br></br></td>
+</tr>
+
+<tr valign="top">
+<td align="center">124<br></br></td>
+<td align="center">CAD<br></br></td>
+<td align="left"><img src='../slike2/CAD.gif' height="11" width="16"/>&nbsp;KANADA         <br></br></td>
+<td align="center">  1<br></br></td>
+<td align="center">         78.5289<br></br></td>
+<td align="center">         79.7248<br></br></td>
+<td align="center">         80.9207<br></br></td>
+<td align="center">         78.5289<br></br></td>
+<td align="center">         80.9207<br></br></td>
+</tr>
+
+<tr valign="top">
+<td align="center">208<br></br></td>
+<td align="center">DKK<br></br></td>
+<td align="left"><img src='../slike2/DKK.gif' height="11" width="16"/>&nbsp;DANSKA         <br></br></td>
+<td align="center">  1<br></br></td>
+<td align="center">         15.4678<br></br></td>
+<td align="center">         15.7034<br></br></td>
+<td align="center">         15.9390<br></br></td>
+<td align="center">         15.4678<br></br></td>
+<td align="center">         15.9390<br></br></td>
+</tr>
+
+<tr valign="top">
+<td align="center">578<br></br></td>
+<td align="center">NOK<br></br></td>
+<td align="left"><img src='../slike2/NOK.gif' height="11" width="16"/>&nbsp;NORVESKA       <br></br></td>
+<td align="center">  1<br></br></td>
+<td align="center">          9.9009<br></br></td>
+<td align="center">         10.0517<br></br></td>
+<td align="center">         10.2025<br></br></td>
+<td align="center">          9.9009<br></br></td>
+<td align="center">         10.2025<br></br></td>
+</tr>
+
+<tr valign="top">
+<td align="center">643<br></br></td>
+<td align="center">RUB<br></br></td>
+<td align="left"><img src='../slike2/RUB.gif' height="11" width="16"/>&nbsp;RUSIJA         <br></br></td>
+<td align="center">  1<br></br></td>
+<td align="center">          1.1140<br></br></td>
+<td align="center">          1.1726<br></br></td>
+<td align="center">          1.2312<br></br></td>
+<td align="center">          0.0000<br></br></td>
+<td align="center">          0.0000<br></br></td>
+</tr>
+
+<tr valign="top">
+<td align="center">752<br></br></td>
+<td align="center">SEK<br></br></td>
+<td align="left"><img src='../slike2/SEK.gif' height="11" width="16"/>&nbsp;SVEDSKA        <br></br></td>
+<td align="center">  1<br></br></td>
+<td align="center">          9.9941<br></br></td>
+<td align="center">         10.1463<br></br></td>
+<td align="center">         10.2985<br></br></td>
+<td align="center">          9.9941<br></br></td>
+<td align="center">         10.2985<br></br></td>
+</tr>
+
+<tr valign="top">
+<td align="center">756<br></br></td>
+<td align="center">CHF<br></br></td>
+<td align="left"><img src='../slike2/CHF.gif' height="11" width="16"/>&nbsp;SVAJCARSKA     <br></br></td>
+<td align="center">  1<br></br></td>
+<td align="center">        118.0506<br></br></td>
+<td align="center">        119.8483<br></br></td>
+<td align="center">        121.6460<br></br></td>
+<td align="center">        118.0506<br></br></td>
+<td align="center">        121.6460<br></br></td>
+</tr>
+
+<tr valign="top">
+<td align="center">826<br></br></td>
+<td align="center">GBP<br></br></td>
+<td align="left"><img src='../slike2/GBP.gif' height="11" width="16"/>&nbsp;VEL. BRITANIJA <br></br></td>
+<td align="center">  1<br></br></td>
+<td align="center">        134.5570<br></br></td>
+<td align="center">        136.6061<br></br></td>
+<td align="center">        138.6552<br></br></td>
+<td align="center">        134.5570<br></br></td>
+<td align="center">        138.6552<br></br></td>
+</tr>
+
+<tr valign="top">
+<td align="center">840<br></br></td>
+<td align="center">USD<br></br></td>
+<td align="left"><img src='../slike2/USD.gif' height="11" width="16"/>&nbsp;S A D          <br></br></td>
+<td align="center">  1<br></br></td>
+<td align="center">        106.5299<br></br></td>
+<td align="center">        108.1522<br></br></td>
+<td align="center">        109.7745<br></br></td>
+<td align="center">        106.5299<br></br></td>
+<td align="center">        109.7745<br></br></td>
+</tr>
+`
+
+describe('convertExchangeRates', () => {
+  it('converts exchange rates', () => {
+    expect(convertExchangeRates(input)).toEqual(new Map([
+      ['EUR', 117.1397],
+      ['AUD', 71.1188],
+      ['CAD', 79.7248],
+      ['DKK', 15.7034],
+      ['NOK', 10.0517],
+      ['RUB', 1.1726],
+      ['SEK', 10.1463],
+      ['CHF', 119.8483],
+      ['GBP', 136.6061],
+      ['USD', 108.1522]
+    ]))
+  })
+})
diff --git a/src/plugins/postal-savings-rs/api.ts b/src/plugins/postal-savings-rs/api.ts
@@ -1,6 +1,6 @@
-import { accountDetailsToId, convertAccount, convertCardTransactions, convertTransactions } from './converters'
-import { AccountDetails, PBAccount } from './models'
-import { fetchAccountData, fetchCardTransactions } from './fetchApi'
+import { accountDetailsToId, convertAccount, convertCardTransactions, convertExchangeRates, convertTransactions } from './converters'
+import { AccountDetails, ExchangeRatesMap, PBAccount } from './models'
+import { fetchAccountData, fetchCardTransactions, fetchExchangeRates } from './fetchApi'
 import { Transaction } from '../../types/zenmoney'
 
 function accountCardKey (accountId: string): string {
@@ -46,3 +46,16 @@ export async function fetchTransactions (account: PBAccount, fromDate: Date, toD
 
   return accountTransactions.filter(transaction => transaction.date >= fromDate && transaction.date <= toDate)
 }
+
+const exchangeRatesByDate = new Map<Date, ExchangeRatesMap>()
+
+async function getExcahangeRate (date: Date, currency: string): Promise<number | undefined> {
+  let exchangeRates = exchangeRatesByDate.get(date)
+  if (exchangeRates === undefined) {
+    const rawData = await fetchExchangeRates(date)
+    exchangeRates = convertExchangeRates(rawData)
+    exchangeRatesByDate.set(date, exchangeRates)
+  }
+
+  return exchangeRates.get(currency)
+}
diff --git a/src/plugins/postal-savings-rs/converters.ts b/src/plugins/postal-savings-rs/converters.ts
@@ -1,5 +1,5 @@
 import { AccountOrCard, AccountType, Transaction } from '../../types/zenmoney'
-import { AccountDetails, CardTransaction } from './models'
+import { AccountDetails, CardTransaction, ExchangeRatesMap } from './models'
 import moment from 'moment'
 
 export function accountDetailsToId (account: AccountDetails): string {
@@ -14,9 +14,10 @@ function parseDate (s: string): Date {
   return moment(s, 'DD.MM.YYYY').toDate()
 }
 
-function tableLineRegexp (columns: number): RegExp {
-  const cellPattern = '<td[^>]*>([^<]+)<\\/td>\\s+'
-  const regexStr = `<tr>\\s+${cellPattern.repeat(columns)}<\\/tr>`
+function tableLineRegexp (columns: number, cellContentPattern?: string): RegExp {
+  cellContentPattern = cellContentPattern ?? '([^<]+)'
+  const cellPattern = `<td[^>]*>${cellContentPattern}<\\/td>\\s+`
+  const regexStr = `<tr[^>]*>\\s+${cellPattern.repeat(columns)}<\\/tr>`
   return new RegExp(regexStr, 'g')
 }
 
@@ -119,3 +120,18 @@ export function convertTransactions (accountId: string, data: string): Transacti
 
   return transactions.reverse()
 }
+
+export function convertExchangeRates (data: string): ExchangeRatesMap {
+  const exchangeRates: ExchangeRatesMap = new Map()
+
+  const cellContentPattern = '(?:<img[^<]+/>)?([^<]+)(?:<br></br>)?'
+  const matches = data.matchAll(tableLineRegexp(9, cellContentPattern))
+
+  for (const t of matches) {
+    // Currency code, Currency designation, Country, Unit, Buying rate, Middle rate, Selling rate, Buying rate (cash), Selling rate (cash)
+    const [,,currency,,,,middleRate] = t
+    exchangeRates.set(currency, parseFloat(middleRate.trim()))
+  }
+
+  return exchangeRates
+}
diff --git a/src/plugins/postal-savings-rs/fetchApi.ts b/src/plugins/postal-savings-rs/fetchApi.ts
@@ -1,3 +1,4 @@
+import moment from 'moment'
 import { FetchResponse, fetch } from '../../common/network'
 import { toAtLeastTwoDigitsString } from '../../common/stringUtils'
 import { InvalidLoginOrPasswordError } from '../../errors'
@@ -122,3 +123,13 @@ export async function fetchCardTransactions (cardNumber: string, fromDate: Date,
 
   return response.body as string
 }
+
+export async function fetchExchangeRates (date: Date): Promise<string> {
+  const formattedDate = moment(date).format('DD.MM.YYYY')
+  const response = await fetchUrl('kursl.jsp', {
+    method: 'POST',
+    body: `DATUM=${formattedDate}&check1=on`
+  })
+
+  return response.body as string
+}
diff --git a/src/plugins/postal-savings-rs/models.ts b/src/plugins/postal-savings-rs/models.ts
@@ -29,3 +29,5 @@ export interface CardTransaction {
   amount: Amount
   merchant: string
 }
+
+export type ExchangeRatesMap = Map<string, number>