initial login feature (using selenium)

+import * as selenium from 'selenium-webdriver';
+import * as firefox from 'selenium-webdriver/firefox.js'
+
+/*
+
+import fs from 'fs/promises'
+import { login, load, logout } from './khcanvas.js';
+
+fs.readFile("asdffdsa.txt").then(it => {
+    const auth = it.toString().split('|')
+    login(auth[0], auth[1]).then(async driver => {
+        load(driver, new Date())
+            .then(it => { 
+                console.log(it)
+                logout(driver)
+             })
+    }).catch(err => { console.log(err) })
+})
+
+*/
+
+/*
+open selenium session -> login -> get schedule -> logout -> close selenium session
+
+id: string
+pw: string
+target_date: Date
+
+returns unsubmitted assignments
+
+ex)
+[
+    {
+        'course_name': '오픈소스SW개발 00분반'
+        'due_date': '2022-05-15T14:59:59Z'
+        'assignment_name': '과제이름'
+        'points': 10.0
+    }
+]
+*/
+
+export async function get_schedule(id, pw, target_date) {
+    login(id, pw).then(async driver => {
+        load(driver, target_date)
+            .then(it => { 
+                console.log(it)
+                logout(driver)
+             })
+    })
+}
+
+export async function login(id, pw) {
+    const option = new firefox.Options()
+    option.setBinary('C:\\Program Files\\Mozilla Firefox\\firefox.exe')
+    const driver = new selenium.Builder()
+        .forBrowser('firefox')
+        .setFirefoxOptions(option)
+        .build()
+
+    await driver.get("https://khcanvas.khu.ac.kr/")
+
+    const idInput = await driver.findElement(selenium.By.xpath('//*[@id="login_user_id"]'));
+    const pwInput = await driver.findElement(selenium.By.xpath('//*[@id="login_user_password"]'));
+    const login_button = await driver.findElement(selenium.By.xpath('//*[@id="form1"]/div/div[3]'));
+    
+    await idInput.sendKeys(id);
+    await pwInput.sendKeys(pw);
+    await login_button.click();
+    
+    return driver
+}
+
+export async function load(driver, until) {
+    const start_date = until.toISOString()
+
+    await driver.get(`https://khcanvas.khu.ac.kr/api/v1/planner/items?start_date=${start_date}`);
+    await sleep(1000)
+    await driver.findElement(selenium.By.xpath('/html/body/div/div/nav/ul/li[2]')).click();
+    
+    const data = await driver.findElement(selenium.By.xpath('/html/body/div/div/div/div[2]/div/div/div[2]/pre'));
+    const text = JSON.parse((await data.getText()).slice(9))
+
+    return text.filter(it =>
+        !it.submissions.submitted && it.plannable_type === "assignment").map(it => new Map([['course_name', it.context_name], ['due_date', it.plannable.due_at], ['assignment_name', it.plannable.title], ['points', it.plannable.points_possible]]))
+}
+
+export async function logout(driver) {
+    await driver.get("https://khcanvas.khu.ac.kr/")
+
+    const logoutPanel = await driver.findElement(selenium.By.xpath('html/body/div[2]/header[2]/div[1]/ul/li[1]/button/div[1]')).click();
+    await sleep(1000)
+    const logout = await driver.findElement(selenium.By.xpath('html/body/div[3]/span/span/div/div/div/div/div/span/form/button'));
+    logout.click()
+    await sleep(1000)
+
+    driver.quit()
+}
+
+function sleep(ms) {
+    return new Promise((r) => setTimeout(r, ms));
+}
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