function setTheme(){const time=new Date();const prev=localStorage.getItem('date');const date=String(time.getMonth()+1)+'.'+String(time.getDate());const now=time.getTime();let sunrise;let sunset;function setBodyClass(){if(now>sunrise&&now<sunset)return;document.body.classList.add('dark');}
if(date!==prev){fetch('https://api.ipgeolocation.io/astronomy?apiKey=5ed37d85103e4defa5df4c5298ed5215').then(res=>res.json()).then(data=>{sunrise=data.sunrise.split(':').map(Number);sunset=data.sunset.split(':').map(Number);}).catch(()=>{sunrise=[7,0];sunset=[19,0];}).finally(()=>{sunrise=time.setHours(sunrise[0],sunrise[1],0);sunset=time.setHours(sunset[0],sunset[1],0);setBodyClass();localStorage.setItem('sunrise',sunrise);localStorage.setItem('sunset',sunset);});localStorage.setItem('date',date);}else{sunrise=Number(localStorage.getItem('sunrise'));sunset=Number(localStorage.getItem('sunset'));setBodyClass();}}