feat: locally caching of booking sessions

Allows for the ability to resume a session without the need to BankID identification if not yet expired.

.gitignore

@@ -6,4 +6,5 @@ dist
 build
 .*.log
 proxies.txt
-.config.local.json
+.config.local.json
+.session.json

package.json

@@ -26,6 +26,7 @@
     "@types/node": "^17.0.23",
     "@types/node-fetch": "^2.6.1",
     "@types/qrcode-terminal": "^0.12.0",
+    "@types/tough-cookie": "^4.0.5",
     "@types/yargs": "^17.0.10",
     "@typescript-eslint/eslint-plugin": "^5.18.0",
     "@typescript-eslint/parser": "^5.18.0",
@@ -45,6 +46,7 @@
     "https-proxy-agent": "^5.0.0",
     "node-fetch": "^2.6.7",
     "qrcode-terminal": "^0.12.0",
+    "tough-cookie": "^4.1.3",
     "winston": "^3.6.0",
     "yargs": "^17.4.0"
   },

src/configuration/session.ts

@@ -0,0 +1,40 @@
+import fs from "fs";
+
+import { logger } from "../logger";
+import { getPath } from "../utils";
+
+interface SessionData {
+  cookie: string;
+  hash: string;
+}
+
+export const saveSession = (hash: string, cookie: string) => {
+  try {
+    const configPath = getPath("./.session.json");
+
+    if (configPath) {
+      fs.writeFileSync(configPath, JSON.stringify({ cookie, hash }), "utf-8");
+    }
+  } catch (error) {
+    logger.verbose(`Failed to save session: ${error}`);
+  }
+};
+
+export const getSession = (hash: string) => {
+  try {
+    const sessionPath = getPath("./.session.json");
+    const data: SessionData = JSON.parse(
+      fs.readFileSync(sessionPath).toString()
+    );
+
+    if (data.hash !== hash) {
+      logger.verbose(
+        "Session hash mismatch, ignoring recovering from last session"
+      );
+    }
+
+    return data.cookie;
+  } catch (error) {
+    // quiet, there might be no session...
+  }
+};

src/index.ts

@@ -6,6 +6,7 @@ import { Location, readConfig, validateConfig } from "./configuration";
 import { BookingService } from "./services/bookingService/bookingService";
 import {
   addDays,
+  generateHash,
   getMaxDate,
   getShortDate,
   getStartOfWeekDate,
@@ -55,6 +56,7 @@ async function init(locations: Location[], date: Date) {
     useProxy: config.useProxies,
     proxyTimeout: config.proxyTimeout,
     proxyRetries: config.proxyRetries,
+    hash: generateHash(JSON.stringify(config)),
   };
 
   const bookingService = config.booking_number