Debug Access Token Refresh (#43)

* This does it

* Test deploy

* token is always expired, for testing purposes

* token is expired once until refreshed, for testing purposes

* token is expired once until refreshed, for testing purposes

* successful auto refresh on dev

* Added an expired token to mock the process one more time.

* log wording

* Ready for production

* dumb extra space

Author: thehabes

package-lock.json

@@ -13,6 +13,7 @@
     "debug": "~2.6.9",
     "dotenv": "^10.0.0",
     "dotenv-expand": "^8.0.1",
+    "envfile": "^7.1.0",
     "express": "^4.18.2",
     "got": "^11.8.3",
     "http-errors": "~1.6.3",

package.json

@@ -1,5 +1,9 @@
 require('dotenv').config()
 const got = require('got')
+const fs = require('node:fs/promises')
+const { parse, stringify } = require('envfile')
+const sourcePath = '.env'
+let expired = true
 
 // https://stackoverflow.com/a/69058154/1413302
 const isTokenExpired = (token) => (Date.now() >= JSON.parse(Buffer.from(token.split('.')[1], 'base64').toString()).exp * 1000)
@@ -11,21 +15,35 @@ const isTokenExpired = (token) => (Date.now() >= JSON.parse(Buffer.from(token.sp
  */
 async function generateNewAccessToken() {
     try {
-        const { tokenObject } = await got.post(process.env.RERUM_ACCESS_TOKEN_URL, {
+        const tokenObject = await got.post(process.env.RERUM_ACCESS_TOKEN_URL, {
             timeout: 10000,
-            json: { REFRESH_TOKEN: process.env.REFRESH_TOKEN }
+            json: { "refresh_token": process.env.REFRESH_TOKEN }
         }).json()
-
         process.env.ACCESS_TOKEN = tokenObject.access_token
+        try{
+            const data = await fs.readFile('./.env', { encoding: 'utf8' })
+            // Please note that this parse() will remove all #comments in the .env file.
+            let env_file_obj = parse(data)
+            env_file_obj.ACCESS_TOKEN = tokenObject.access_token
+            await fs.writeFile('./.env', stringify(env_file_obj))
+            console.log("TinyNode now has an updated access token.")
+        }
+        catch(env_error){
+            console.error("Could not write new token property to the file.  The access token has not been updated.")
+            console.error(env_error)
+        }  
+    }
+    catch (err) { 
+        console.error("Access token not updated: ", err) 
     }
-    catch (err) { console.error("Token not updated: ", err) }
-
-    console.warn("Access Token expired. Consider updating your .env files")
 }
 
 /**
  * This will conduct a simple check against the expiry date in your token.
  * This does not validate your access token, so you may still be rejected by 
  * your RERUM instance as unauthorized.
  */
-//if (isTokenExpired(process.env.ACCESS_TOKEN)) { generateNewAccessToken() }
+if (isTokenExpired(process.env.ACCESS_TOKEN)) { 
+    console.log("Tiny Node detected an expired access token.  Updating the token now.")
+    generateNewAccessToken() 
+}