Chikus Weather app

submissions/Chikus/weather-app/index.js

@@ -0,0 +1,79 @@
+let fs = require('fs');
+
+const help =
+`Simple weather application
+This script takes 2 parameters:
+--l(--location)     Parameter which defines the city where you want see forecast
+           City must be specified after the parameter.
+           If you start the program without providing any location, last successful query will be repeated.
+           Example: node index.js --l=Kyiv
+--r(--range)     Parameter which specifies forecast period.
+           Range must be specified after the parameter.
+           It can be specified as 'day' or 'week'.
+           Default value = day.
+           Example: node index.js --range=week
+--help     Parameter will show this instructions. \n`;
+
+const args = process.argv.splice(2,process.argv.length);
+if (args.length > 2 || args.join(',').includes('--help')) {
+  process.stdout.write(help);
+  return 0;
+}
+const city = (args.join(',').includes('--l'))?args[args.findIndex(ele => ele.match('--l'))].split('=')[1]:fs.readFileSync('storecity','utf8').replace(/\r?\n|\r/,'');
+if (city === '') throw new Error('Please provide a city \n');
+const range = args.join(',').includes('week')?'forecast':'weather';
+const options = {
+  hostname: 'api.openweathermap.org',
+  port: 443,
+  path: `/data/2.5/${range}?q=${city}&appid=a5648b4f5b2e2989f059b602887ada85`,
+  method: 'GET'
+};
+const req =require('https').request(options, (res) => {
+  const displayA = [];
+  res.on('data', (d) => {
+    const obj = JSON.parse(d);
+    if (res.statusCode >= 300) {
+      throw new Error('City '+res.statusMessage+'\n');
+    }
+    else if (range === 'weather') {
+      const display = {};
+      display.COUNTRY = city+','+obj.sys.country;
+      display.temp = obj.main.temp - 273.15;
+      display.description = obj.weather[0].description;
+      display.speed = obj.wind.speed;
+      display.direction = obj.wind.deg;
+      display.humid = obj.main.humidity;
+      displayA.push(display);
+    } else {
+      displayA.push({COUNTRY:city+','+obj.city.country})
+      for(let i = 1, j = 0; i < 39; i += 8) {
+        displayA.push({DAY:'#######'+obj.list[i].dt_txt.split(' ')[0]+'######'})
+        j = i;
+        ['morning','noon','evening','night'].forEach(ele => {
+            const display = {};
+            display['temp_at_'+ele] = obj.list[j].main.temp - 273.15;
+            display['description_at_'+ele] = obj.list[j].weather[0].description;
+            display['speed_at_'+ele] = obj.list[j].wind.speed;
+            display['direction_at_'+ele] = obj.list[j].wind.deg;
+            display['humid_at_'+ele] = obj.list[j].main.humidity;
+            displayA.push(display);
+            j += 2;
+          }
+        )
+      }
+    }
+    fs.writeFileSync('storecity',city);
+  });
+  res.on('end', ()=> {
+    displayA.forEach(ele=>{
+      for (key in ele){
+        console.log( key + ": " + ele[key]);
+      }
+    })
+
+  });
+});
+req.on('error', (e) => {
+  console.error(e);
+});
+req.end();