feat. Hide secret key

 const axios = require('axios');
 
-const SERVICE_KEY = "tNd%2FZ0MMJA5NZrU9nA5IVTKkhpz6N3j1OGpFT0PmbcCOVEZbpR9PYiNHuD9rLuSsyMWkTXPqHsHLWoxlW%2BVVrg%3D%3D"
-const url = "http://apis.data.go.kr/1471000/DrbEasyDrugInfoService/getDrbEasyDrugList";
-
-const updateMedicineInfo = async() => {
-    const queryParams = '?' + encodeURIComponent('ServiceKey') + '=' + SERVICE_KEY;
-    const pageNum36 = '&' + encodeURIComponent('pageNo') + '=' + encodeURIComponent(1)
-    const pageNum37 = '&' + encodeURIComponent('pageNo') + '=' + encodeURIComponent(2);
-    const numOfItem = '&' + encodeURIComponent('numOfRows') + '=' + encodeURIComponent(2);
+exports.updateMedicineInfo = async() => {
+    console.log('starting')
+    
+    const itemArray = await getItemsList(getQueryURL);
+    await exportJsonData(itemArray);
+
+    console.log('data is saved');
+}
+
+//queryUrl을 return하는 함수 : 한 페이지에 100개의 item씩 요청할 수 있다.
+const getQueryURL = (i) => {
+    const url = "http://apis.data.go.kr/1471000/DrbEasyDrugInfoService/getDrbEasyDrugList";
+    const queryParams = '?' + encodeURIComponent('ServiceKey') + '=' + process.env.SERVICE_KEY;
+    const pageNum = '&' + encodeURIComponent('pageNo') + '=' + encodeURIComponent(i);
+    const numOfItem = '&' + encodeURIComponent('numOfRows') + '=' + encodeURIComponent(100);
     const output = '&' + encodeURIComponent('type') + '=' + encodeURIComponent('json');
 
-    const result36 = await axios.get(url + queryParams + pageNum36 + numOfItem + output);
-    const result37 = await axios.get(url + queryParams + pageNum37 + numOfItem + output);
+    return url + queryParams + pageNum + numOfItem + output;
+}
+
+//모든 page의 item을 list에 push해서 return하는 함수
+const getItemsList = async(queryUrl) => {
+    let i = 1, getItem = null, items = null;
+    const result = new Array();
+    
+    while(true) {
+        getItem = await axios.get(queryUrl(i));
+        items = getItem.data.body.items;
 
-    console.log(result36.data.body.items);
-    console.log(result37.data.body.items);
+        if(items === undefined) 
+            return result;
+        
+        result.push(...items);
+        console.log('medicine data getting processing... : page', i, 'done');
+        i++;
+    }
 }
 
-updateMedicineInfo();
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+//itemArray에 있는 모든 data를 json으로 만들어서 json파일로 저장
+const exportJsonData = async(itemList) => {
+    itemList.forEach(item => {
+
+    })
+}
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