better number formatting (#9)

* tweak number display

* select whole amount upon input focus

* handle letter input

* number formatting

features/prices/components/Price/Price.tsx

@@ -1,9 +1,11 @@
-import { usePrices, type PriceCoingecko } from '@/features/prices'
+import { useLocale, usePrices, type PriceCoingecko } from '@/features/prices'
 import { PriceChange } from './PriceChange'
 import styles from './Price.module.css'
+import { formatFiat } from '@/lib'
 
 export function Price({ price }: { price: PriceCoingecko }) {
   const { isValidating, isLoading } = usePrices()
+  const locale = useLocale()
 
   const feedbackClasses = isLoading
     ? 'isLoading'
@@ -13,7 +15,9 @@ export function Price({ price }: { price: PriceCoingecko }) {
 
   return (
     <p className={styles.price}>
-      <span className={`${styles.fiat} ${feedbackClasses}`}>${price.usd}</span>
+      <span className={`${styles.fiat} ${feedbackClasses}`}>
+        {formatFiat(price.usd, 'USD', locale)}
+      </span>
       {price?.usd_24h_change ? (
         <PriceChange priceChange={price.usd_24h_change} />
       ) : null}

features/prices/components/Price/PriceChange.tsx

@@ -2,19 +2,12 @@
 
 import { TriangleUpIcon, TriangleDownIcon } from '@radix-ui/react-icons'
 import styles from './PriceChange.module.css'
-import { useEffect, useState } from 'react'
+import { useLocale } from '@/features/prices/hooks/use-locale'
 
 export function PriceChange({ priceChange }: { priceChange: number }) {
-  const [locale, setLocale] = useState('en-US')
+  const locale = useLocale()
   const styleClasses = priceChange > 0 ? styles.positive : styles.negative
 
-  useEffect(() => {
-    const userLocale = navigator?.languages?.length
-      ? navigator.languages[0]
-      : navigator.language
-    setLocale(userLocale)
-  }, [])
-
   return (
     <span
       className={`${styles.change} ${styleClasses}`}

features/prices/hooks/index.tsx

@@ -1 +1,2 @@
 export * from './use-prices'
+export * from './use-locale'

features/prices/hooks/use-locale.ts

@@ -0,0 +1,16 @@
+'use client'
+
+import { useState, useEffect } from 'react'
+
+export function useLocale() {
+  const [locale, setLocale] = useState('en-US')
+
+  useEffect(() => {
+    const userLocale = navigator?.languages?.length
+      ? navigator.languages[0]
+      : navigator.language
+    setLocale(userLocale)
+  }, [])
+
+  return locale
+}

features/prices/hooks/use-prices.tsx

@@ -1,7 +1,7 @@
 'use client'
 
 import { tokens } from '@/constants'
-import { fetcher, getTokenAddressBySymbol } from '@/lib/utils'
+import { fetcher, getTokenAddressBySymbol } from '@/lib'
 import useSWR from 'swr'
 
 const tokenAddresses = tokens.map((token) => token.address).toString()

features/strategies/components/Buy.tsx

@@ -4,8 +4,8 @@ import { useState } from 'react'
 import { useDebounce } from 'use-debounce'
 import { ratioOceanToAsi, ratioAgixToAsi, ratioFetToAsi } from '@/constants'
 import { usePrices } from '@/features/prices'
-import { getTokenBySymbol } from '@/lib/utils'
-import { FormAmount, Result } from '@/features/strategies/components'
+import { getTokenBySymbol } from '@/lib'
+import { FormAmount, Result } from '@/features/strategies'
 import stylesShared from '@/features/strategies/styles/shared.module.css'
 
 export function Buy() {

features/strategies/components/FormAmount.tsx

@@ -20,6 +20,8 @@ export function FormAmount({
 
     if (value === '') {
       setAmount(0)
+    } else if (isNaN(Number(value))) {
+      return
     } else {
       setAmount(Number(value))
     }
@@ -30,6 +32,10 @@ export function FormAmount({
     setToken(e.target.value as TokenSymbol)
   }
 
+  function handleFocus(e: React.FocusEvent<HTMLInputElement>) {
+    e.target.select()
+  }
+
   const options = isFiat
     ? [{ value: 'USD', label: 'USD' }]
     : [
@@ -46,6 +52,7 @@ export function FormAmount({
         pattern="[0-9]*"
         value={amount}
         onChange={handleAmountChange}
+        onFocus={handleFocus}
         style={{ width: amount.toString().length + 'ch' }}
       />
 

features/strategies/components/Result/Result.tsx

@@ -1,8 +1,9 @@
 import styles from './Result.module.css'
-import { formatNumber } from '@/lib/utils'
+import { formatCrypto, formatFiat } from '@/lib'
 import { ArrowRightIcon } from '@radix-ui/react-icons'
 import { TokenLogo } from '@/components'
 import { Token } from '@/types'
+import { useLocale } from '@/features/prices'
 
 type Props = {
   token: Token | undefined
@@ -23,6 +24,7 @@ export function Result({
   isValidating,
   isLoading
 }: Props) {
+  const locale = useLocale()
   const feedbackClasses = isLoading
     ? 'isLoading'
     : isValidating
@@ -35,15 +37,18 @@ export function Result({
         <TokenLogo token={token} />
 
         <p>
-          <span className={feedbackClasses}>
-            {formatNumber(amount || 0, token?.symbol || '')}
+          <span
+            className={feedbackClasses}
+            title={`${amount} ${token?.symbol}`}
+          >
+            {formatCrypto(amount || 0, token?.symbol || '', locale)}
           </span>
         </p>
 
         {amountOriginalFiat ? (
           <p>
             <span className={`${styles.fiat} ${feedbackClasses}`}>
-              {formatNumber(amountOriginalFiat || 0, 'USD')}
+              {formatFiat(amountOriginalFiat || 0, 'USD', locale)}
             </span>
           </p>
         ) : null}
@@ -53,13 +58,13 @@ export function Result({
         <ArrowRightIcon className={styles.iconArrow} />
 
         <p>
-          <strong title={`${amountAsi}`} className={feedbackClasses}>
-            {formatNumber(amountAsi || 0, 'ASI')}
+          <strong title={`${amountAsi} ASI`} className={feedbackClasses}>
+            {formatCrypto(amountAsi || 0, 'ASI', locale)}
           </strong>
         </p>
         <p>
           <strong className={`${styles.fiat} ${feedbackClasses}`}>
-            {formatNumber(amountFiat || 0, 'USD')}
+            {formatFiat(amountFiat || 0, 'USD', locale)}
           </strong>
         </p>
       </div>

features/strategies/components/Swap/Results.tsx

@@ -1,5 +1,5 @@
 import { ratioOceanToAsi, ratioAgixToAsi, ratioFetToAsi } from '@/constants'
-import { getTokenBySymbol } from '@/lib/utils'
+import { getTokenBySymbol } from '@/lib'
 import { type TokenSymbol } from '@/types'
 import { usePrices, type Prices } from '@/features/prices'
 import { type Market, useQuote } from '@/features/strategies'

features/strategies/hooks/use-quote.ts

@@ -1,7 +1,7 @@
 'use client'
 
 import { TokenSymbol } from '@/types'
-import { getTokenAddressBySymbol, fetcher } from '@/lib/utils'
+import { getTokenAddressBySymbol, fetcher } from '@/lib'
 import useSWR from 'swr'
 
 const options = {

lib/fetch.ts

@@ -0,0 +1,5 @@
+export async function fetcher(url: string) {
+  const res = await fetch(url)
+  if (!res.ok) throw new Error('Failed to fetch')
+  return await res.json()
+}

lib/index.ts

@@ -0,0 +1,3 @@
+export * from './numbers'
+export * from './fetch'
+export * from './tokens'

lib/numbers.ts

@@ -0,0 +1,22 @@
+import { formatCurrency } from '@coingecko/cryptoformat'
+
+export function formatCrypto(price: number, currency: string, locale: string) {
+  return formatCurrency(price, currency, locale, false, {
+    decimalPlaces: 3,
+    significantFigures: 1
+  })
+}
+
+export function formatFiat(price: number, currency: string, locale: string) {
+  let formattedPrice = formatCurrency(price, currency, locale, false, {
+    decimalPlaces: 2,
+    significantFigures: 8
+  })
+
+  // Add a trailing zero if only one digit after the decimal
+  if (formattedPrice.includes('.') && formattedPrice.split('.')[1].length < 2) {
+    formattedPrice += '0'
+  }
+
+  return formattedPrice
+}

lib/tokens.ts

@@ -1,19 +1,5 @@
 import { tokens } from '@/constants'
 import type { TokenAddress, Token } from '@/types'
-import { formatCurrency } from '@coingecko/cryptoformat'
-
-export function formatNumber(price: number, currency: string) {
-  return formatCurrency(price, currency, 'en', false, {
-    decimalPlaces: 3,
-    significantFigures: 5
-  })
-}
-
-export async function fetcher(url: string) {
-  const res = await fetch(url)
-  if (!res.ok) throw new Error('Failed to fetch')
-  return await res.json()
-}
 
 export function getTokenBySymbol(symbol: string): Token | undefined {
   const token = tokens.find((t) => t.symbol === symbol)