AWS(Lambda, API Gateway)でLINEの天気予報botを作ってみる

$ npm install @line/bot-sdk

constline=require('@line/bot-sdk');consthttps=require('https');letevent;letcallback;constresearch_mode=0;//0:郵便番号検索、1:地名検索exports.handler=(_event,_context,_callback)=>{leturl;event=_event;callback=_callback;letuserMessage=JSON.parse(event.body).events[0].message.text;if(research_mode===0){if(typeofuserMessage!=="number"){callback(null,{});}//ハイフンが入力されなかった場合はハイフンを入れるif(userMessage.length!==8){let_userMessage=userMessage.slice(0,3)+"-"+userMessage.slice(3,8);userMessage=_userMessage;}url='https://api.openweathermap.org/data/2.5/forecast?&units=metric&zip='+userMessage+',jp&APPID='+process.env.API_KEY;}else{if(typeofuserMessage!=="string"){callback(null,{});}url='https://api.openweathermap.org/data/2.5/forecast?&units=metric&q='+userMessage+',jp&APPID='+process.env.API_KEY;}https.get(url,main).on('error',(e)=>{callback(null,{});});};letmain=function(res){letresult;res.on('data',(chunk)=>{result=JSON.parse(chunk);});res.on('end',(res)=>{letmessage;constclient=newline.Client({channelAccessToken:process.env.ACCESSTOKEN});if(result.cod==="200"){letcontents=[];//6つの天気情報を格納する配列letheader={"type":"text","text":result.list[3].dt_txt.slice(0,10),//日付"size":"md","color":"#555555","flex":0}contents.push(header);for(leti=3;i<10;i++){let_contents={};_contents={"type":"box","layout":"baseline","contents":[{"type":"text","text":result.list[i].dt_txt.slice(11,16),//時刻"size":"sm","color":"#555555","flex":0},{"type":"text","text":return_japanese_weather(result.list[i].weather[0].main),//天気"size":"sm","color":"#111111","align":"end"},{"type":"icon","url":"https://openweathermap.org/img/w/"+result.list[i].weather[0].icon+".png",//アイコン画像"size":"xl"},{"type":"text","text":String(Math.round(result.list[i].main.temp))+'℃',//気温"size":"sm","color":"#111111","align":"end"}]}contents.push(_contents);}message={"type":"flex","altText":'天気予報',"contents":{"type":"bubble","styles":{"footer":{"separator":true}},"body":{"type":"box","layout":"vertical","contents":[{"type":"text","text":"天気予報","weight":"bold","size":"xxl","margin":"md"},{"type":"text","text":result.city.name,//地名"size":"md","color":"#DC143C","wrap":true},{"type":"separator","margin":"xxl"},{"type":"box","layout":"vertical","margin":"xxl","spacing":"sm","contents":contents}]}}};}else{//該当する天気情報を取得できなかった場合message={type:"text",text:research_mode===0?"該当する郵便番号の天気予報を取得できませんでした。":"該当する地名の天気予報を取得できませんでした。"};}client.replyMessage(JSON.parse(event.body).events[0].replyToken,message).then(()=>{callback(null,{});}).catch((err)=>{callback(null,{});});});};letreturn_japanese_weather=function(weather_eng){letweather_jpn={"Thunderstorm":"雷雨","Drizzle":"霧雨","Rain":"雨","Snow":"雪","Clear":"晴れ","Clouds":"曇り","Mist":"霧","Fog":"濃霧","Haze":"靄","Dust":"砂塵","Sand":"砂嵐","Squall":"スコール","Tornado":"竜巻"}returnweather_jpn[weather_eng]===""?weather_eng:weather_jpn[weather_eng];}