feat: refactor session management and API usage

- Add an import statement for the `get` function from `./utils/env.js`
- Add a constant for `API_ENDPOINT` using the `get` function
- Remove the `sessionId` constant declaration
- Add an `async` function `getSessionId` for fetching session ID
- Add an `async` function `main` for the main program logic
- Initialize `sessionId` using the command line argument or by calling `getSessionId`
- Add a console log statement for the session ID
- Remove the `if` statement for checking `sessionId` existence
- Update the socket URL to use `API_ENDPOINT`
- Add a `socket.on` event listener for the `close` event
- Update the condition for checking the `key` value in `stdin.on` event listener
- Call the `main` function at the end of the file

Signed-off-by: wancat <wancat@wancat.cc>

server/src/client.js

@@ -1,12 +1,32 @@
+/* eslint-disable no-underscore-dangle */
 import { stdin, stdout, exit } from 'process'
 import { io } from 'socket.io-client'
+import { get } from './utils/env.js'
+
+const API_ENDPOINT = get('API_ENDPOINT', 'http://localhost:3000')
 
 stdin.setRawMode(true)
 stdin.resume()
 stdin.setEncoding('utf8')
 
-const sessionId = process.argv[2]
+async function getSessionId() {
+  const res = await fetch(`${API_ENDPOINT}/api/v1/sessions`, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify({
+      quest_id: 'helloworld',
+    }),
+  })
+  const data = await res.json()
+  return data._id
+}
+
+async function main() {
+  const sessionId = process.argv[2] || (await getSessionId())
   console.log(`Session ID: ${sessionId}`)
+  if (!sessionId) exit()
 
   const socket = io('ws://localhost:3000', {
     query: {
@@ -28,10 +48,13 @@ socket.on('close', function close() {
   })
 
   stdin.on('data', (key) => {
-  if (key === '\u0003') {
+    if (key === '\u0004') {
       socket.close()
       exit()
     } else {
       socket.send(key)
     }
   })
+}
+
+main()