fix: currency converter and auth apis

app/api/currency/route.ts

@@ -1,6 +1,6 @@
 import { getSession } from "@/lib/auth"
 import { PoorManCache } from "@/lib/cache"
-import { format } from "date-fns"
+import { format, isSameDay, subDays } from "date-fns"
 import { NextRequest, NextResponse } from "next/server"
 
 type HistoricRate = {
@@ -36,11 +36,17 @@ export async function GET(request: NextRequest) {
       return NextResponse.json({ error: "Missing required parameters: from, to, date" }, { status: 400 })
     }
 
-    const date = new Date(dateParam)
+    let date = new Date(dateParam)
+
     if (isNaN(date.getTime())) {
       return NextResponse.json({ error: "Invalid date format" }, { status: 400 })
     }
 
+    // hack to get yesterday's rate if it's today
+    if (isSameDay(date, new Date())) {
+      date = subDays(date, 1)
+    }
+
     const formattedDate = format(date, "yyyy-MM-dd")
 
     // Check cache first

components/forms/convert-currency.tsx

@@ -1,8 +1,8 @@
+import { FormError } from "@/components/forms/error"
 import { formatCurrency } from "@/lib/utils"
 import { format, startOfDay } from "date-fns"
 import { Loader2 } from "lucide-react"
 import { useEffect, useState } from "react"
-
 export const FormConvertCurrency = ({
   originalTotal,
   originalCurrencyCode,
@@ -25,18 +25,23 @@ export const FormConvertCurrency = ({
   const [exchangeRate, setExchangeRate] = useState(0)
   const [convertedTotal, setConvertedTotal] = useState(0)
   const [isLoading, setIsLoading] = useState(false)
+  const [error, setError] = useState<string | null>(null)
 
   useEffect(() => {
     const fetchData = async () => {
       try {
         setIsLoading(true)
+        setError(null)
+
         const exchangeRate = await getCurrencyRate(originalCurrencyCode, targetCurrencyCode, normalizedDate)
+
         setExchangeRate(exchangeRate)
         setConvertedTotal(Math.round(originalTotal * exchangeRate * 100) / 100)
       } catch (error) {
         console.error("Error fetching currency rates:", error)
         setExchangeRate(0)
         setConvertedTotal(0)
+        setError(error instanceof Error ? error.message : "Failed to fetch currency rate")
       } finally {
         setIsLoading(false)
       }
@@ -74,7 +79,10 @@ export const FormConvertCurrency = ({
               className="w-32 rounded-md border border-input px-2 py-1"
             />
           </div>
+          {!error && (
             <div className="text-xs text-muted-foreground">The exchange rate will be added to the transaction</div>
+          )}
+          {error && <FormError className="mt-0 text-sm">{error}</FormError>}
         </div>
       )}
     </div>
@@ -82,20 +90,15 @@ export const FormConvertCurrency = ({
 }
 
 async function getCurrencyRate(currencyCodeFrom: string, currencyCodeTo: string, date: Date): Promise<number> {
-  try {
   const formattedDate = format(date, "yyyy-MM-dd")
   const response = await fetch(`/api/currency?from=${currencyCodeFrom}&to=${currencyCodeTo}&date=${formattedDate}`)
 
   if (!response.ok) {
     const errorData = await response.json()
-      console.error("Currency API error:", errorData.error)
-      return 0
+    console.log("Currency API error:", errorData.error)
+    throw new Error(errorData.error || "Failed to fetch currency rate")
   }
 
   const data = await response.json()
   return data.rate
-  } catch (error) {
-    console.error("Error fetching currency rate:", error)
-    return 0
-  }
 }

lib/auth.ts

@@ -1,9 +1,10 @@
 import config from "@/lib/config"
 import { createUserDefaults } from "@/models/defaults"
-import { getSelfHostedUser } from "@/models/users"
+import { getSelfHostedUser, getUserByEmail } from "@/models/users"
 import { User } from "@prisma/client"
 import { betterAuth } from "better-auth"
 import { prismaAdapter } from "better-auth/adapters/prisma"
+import { APIError } from "better-auth/api"
 import { nextCookies } from "better-auth/next-js"
 import { emailOTP } from "better-auth/plugins/email-otp"
 import { headers } from "next/headers"
@@ -56,6 +57,10 @@ export const auth = betterAuth({
       otpLength: 6,
       expiresIn: 10 * 60, // 10 minutes
       sendVerificationOTP: async ({ email, otp }) => {
+        const user = await getUserByEmail(email)
+        if (!user) {
+          throw new APIError("NOT_FOUND", { message: "User with this email does not exist" })
+        }
         await sendOTPCodeEmail({ email, otp })
       },
     }),