implemented currency conversion for the given currencies, just need t…

…o then use it to do the transactions and convert the initial amount of money when selecting a currency when you first login

package.json

@@ -23,8 +23,10 @@
 	},
 	"type": "module",
 	"dependencies": {
+		"@dinero.js/currencies": "^2.0.0-alpha.14",
 		"@supabase/auth-helpers-sveltekit": "^0.10.3",
 		"@supabase/supabase-js": "^2.38.2",
-		"dinero.js": "^2.0.0-alpha.14"
+		"dinero.js": "^2.0.0-alpha.14",
+		"fast-iban": "^1.2.0"
 	}
 }

src/app.d.ts

@@ -16,6 +16,8 @@ declare global {
     supabase: SupabaseClient<Database>
   }
 
+  type AvailableCurrencies = "USD" | "EUR" | "CAD" | "AUD" | "GBP" | "NOK" | "JPY" | "IDR" | "DKK" | "SEK" | "MXN"
+
   namespace Resources {
     interface ICard {
       id: string

src/hooks.server.ts

@@ -2,6 +2,7 @@
 import { PUBLIC_SUPABASE_URL, PUBLIC_SUPABASE_ANON_KEY } from "$env/static/public"
 import { createSupabaseServerClient } from "@supabase/auth-helpers-sveltekit"
 import type { Handle } from "@sveltejs/kit"
+
 export const handle: Handle = async ({ event, resolve }) => {
     event.locals.supabase = createSupabaseServerClient({
         supabaseUrl: PUBLIC_SUPABASE_URL,
@@ -16,7 +17,6 @@ export const handle: Handle = async ({ event, resolve }) => {
 
     event.locals.getSession = async () => await getSessionHelper()
 
-
     return resolve(event, {
         filterSerializedResponseHeaders(name) {
         return name === 'content-range'

src/lib/server/currencies.ts

@@ -0,0 +1,68 @@
+import { dinero, convert } from "dinero.js"
+import { USD, MXN, EUR, CAD, AUD, SEK, DKK, NOK, JPY, IDR, GBP  } from "@dinero.js/currencies";
+import type { Currency, Dinero } from "dinero.js";
+
+const currencyConversionMap: { [currency in AvailableCurrencies]: { [currency in AvailableCurrencies]: number } } = {
+  "USD": { "MXN": 18, "EUR": 0.85, "CAD": 1.25, "AUD": 1.35, "SEK": 9, "DKK": 6.5, "USD": 1, "NOK": 8, "JPY": 110, "GBP": 0.75, "IDR": 14000 },
+  "MXN": { "USD": 0.05, "EUR": 0.04, "CAD": 0.06, "AUD": 0.07, "SEK": 0.50, "DKK": 0.77, "NOK": 0.63, "JPY": 5.0, "GBP": 0.04, "IDR": 700, "MXN": 1 },
+  "CAD": { "USD": 0.80, "EUR": 0.68, "MXN": 16.67, "AUD": 0.90, "SEK": 6.67, "DKK": 4.86, "NOK": 7.50, "JPY": 82.35, "GBP": 0.60, "IDR": 12000, "CAD": 1 },
+  "EUR": { "USD": 1.18, "CAD": 1.47, "MXN": 25.00, "AUD": 1.61, "SEK": 11.76, "DKK": 8.57, "NOK": 10.00, "JPY": 117.65, "GBP": 0.88, "IDR": 15000, "EUR": 1},
+  "SEK": { "USD": 0.11, "CAD": 0.15, "MXN": 2.00, "EUR": 9.09, "AUD": 0.19, "DKK": 0.73, "NOK": 0.87, "JPY": 9.09, "GBP": 0.07, "IDR": 1500 , "SEK": 1},
+  "DKK": { "USD": 0.15, "CAD": 0.21, "MXN": 2.00, "EUR": 11.76, "AUD": 0.25, "SEK": 1.37, "NOK": 1.18, "JPY": 13.33, "GBP": 0.10, "IDR": 2000, "DKK": 1},
+  "JPY": { "USD": 0.0091, "CAD": 0.0121, "MXN": 0.20, "EUR": 0.0085, "AUD": 0.013, "SEK": 0.11, "DKK": 0.075, "NOK": 0.090, "GBP": 0.0073, "IDR": 150, "JPY": 1 },
+  "IDR": { "USD": 0.0000714, "CAD": 0.0000833, "MXN": 0.0000143, "EUR": 0.0000667, "AUD": 0.0000714, "SEK": 0.0006667, "DKK": 0.0005, "NOK": 0.0005882, "JPY": 0.0067, "GBP": 0.0000667, "IDR": 1 },
+  "NOK": { "USD": 0.13, "CAD": 0.20, "MXN": 1.25, "EUR": 10.00, "AUD": 0.21, "SEK": 1.09, "DKK": 0.85, "JPY": 11.11, "GBP": 0.08, "IDR": 1700, "NOK": 1 },
+  "GBP": {"USD": 1.31, "CAD": 1.73, "MXN": 25.63, "EUR": 1.16, "AUD": 1.84, "SEK": 11.47, "DKK": 8.51, "JPY": 148.20, "GBP": 1, "IDR": 18249.30, "NOK": 13.5 },
+  "AUD": { "USD": 0.60, "CAD": 0.34, "MXN": 1.19, "EUR": 4.76, "AUD": 1, "SEK": 4.76, "DKK": 4.76, "JPY": 52.86, "GBP": 0.54, "IDR": 8095.24, "NOK": 4.76 }
+}
+
+
+
+class Currencies {
+  private currencies: Currency<number>[]
+  constructor () {
+    this.currencies = [USD, MXN, EUR, CAD, AUD, SEK, DKK, NOK, JPY, IDR, GBP]
+  }
+
+  setDineroObject (amount: number, currency: AvailableCurrencies) {
+    for (const x of this.currencies) {
+      if (x.code === currency) {
+        return dinero({ amount, currency: x })
+      }
+    }
+  }
+
+  private setRate (currency: AvailableCurrencies, amount: number) {
+    return { [`${currency}`]: { amount, scale: 2 } }
+  }
+
+  conversion (from: Dinero<number>, to: AvailableCurrencies): number {
+    // had to any
+    let convertedAmount: any
+    const currentCurrency = from.toJSON().currency.code
+    const converted = currencyConversionMap[currentCurrency as AvailableCurrencies]
+    // O(n^2) solution you guys can improve it if you want
+
+    for (const x in converted) {
+      if (to === x) {
+        const rate = this.setRate(x, converted[x])
+        for (const k of this.currencies) {
+          if (k.code === to) {
+            convertedAmount = convert(from, k, rate)
+          }
+        }
+      }
+    }
+    // when you do the conversion you will get something as 
+    // {
+    //   amount: 90000,
+    //   currency: { code: 'MXN', base: 10, exponent: 2 },
+    //   scale: 4
+    // } 
+    // it seems like it adds an extra 0 which is supposed to be a decimal for whatever reason but, other than that it is accurate.
+    // 9k mexican pesos / 500 dollars = 18
+    return convertedAmount.toJSON().amount as number
+  }
+}
+
+export default Currencies

src/lib/server/util.ts

@@ -12,4 +12,4 @@ export async function prepareDerived ({ getSession, supabase }: App.Locals): Pro
   if (!derived) throw error(500, "Something went wrong during a critical process of the card retrieval operation!")
 
   return { crypt, derived, userId }
-}
+}

src/routes/set-currency/+page.server.ts

@@ -1,8 +1,8 @@
+import fastIBAN from "fast-iban"
 import { fail, redirect, error } from '@sveltejs/kit';
 import type { Actions } from "./$types";
 import currency_list from "$lib/currency_list.json";
 
-
 export const actions: Actions = {
     default: async ({ request, locals: { supabase, getSession } }) => {
 
@@ -12,9 +12,13 @@ export const actions: Actions = {
         if (!currency_list.some(c => c.code === currency)) return fail(400, {message: "Invalid currency", success: false, error: "currency"})
 
         if(session !== null){
+            const ibanCountryCode = currency.split("").slice(0, 2).join("")
             const { data, error } = await supabase
             .from('account')
-            .update({ currency: currency })
+            // note that the sketch iban lib asks for 2 values, bionic doesnt have a bank account so he does not know how this
+            // works (yes this is my excuse)
+            // so im just gonna add a uuid for the first param and the first 2 initials for country code ig?
+            .update({ currency, iban: fastIBAN.generateIBAN(crypto.randomUUID(), ibanCountryCode) })
             .eq("user_id", session.user.id)
 
             if(error) return fail(400, {message: "Unable to input currency, please try again", success: false})