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Cache rates for 1 hour

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This commit is contained in:
Yash Karandikar 2021-10-04 08:55:16 -05:00
parent d164c07a9e
commit c5e804573c
1 changed files with 12 additions and 4 deletions
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16
concurrency/src/Exchanger.tsx
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@ -12,9 +12,17 @@ function Exchanger() {
let [result, setResult] = useState("0.00");
useEffect(() => {
axios.get(process.env.API_URL).then(resp => {
setRates(resp.data);
});
let saved = Number(localStorage.getItem("saved"));
if (Math.floor(Date.now() / 1000) - saved > 3600) {
axios.get(process.env.API_URL).then(resp => {
setRates(resp.data);
localStorage.setItem("saved", Math.floor(Date.now() / 1000).toString());
localStorage.setItem("rates", JSON.stringify(resp.data));
});
} else {
let data = JSON.parse(localStorage.getItem("rates"));
setRates(data);
}
}, []);
function handleSelectedOne(event: any) {
@ -63,7 +71,7 @@ function Exchanger() {
</div>
<br />
<div style={{display: "flex", justifyContent: "center"}}>
<div style={{ display: "flex", justifyContent: "center" }}>
<button onClick={handleConvertClick}>Convert!</button>
</div>
</>