Chenged url fetching method to a class based one

Implemented control on video title in the eventuality it is null or only special characters

Implemented suggestion of issue #11 about sanitizing the title

destreamer.ts

@@ -5,6 +5,7 @@ import fs from 'fs';
 import path from 'path';
 import { BrowserTests } from './BrowserTests';
 import yargs = require('yargs');
+import sanitize = require('sanitize-filename')
 
 // Type in your username here (the one you use to
 // login to Microsoft Stream).
@@ -91,19 +92,27 @@ async function rentVideoForLater(videoUrls: string[], username: string, outputDi
 
         await sleep(4000);
         console.log('Looking up AMS stream locator...');
-        let amp: any;
+        // let amp: any;
+        let document: any;
         const amsUrl = await page.evaluate(
-            () => { return amp.Player.players["vjs_video_3"].cache_.src }
+            // maybe there should be some check in case the url fetch fails
+            () => { return document?.querySelector(".azuremediaplayer")?.player?.cache_?.src; }
         );
 
+        // console.log(`Video url is: ${amsUrl}`);
+        console.log('Fetching title');
+
         let title = await page.evaluate(
-            // Clear abuse of null assertion operator,
-            // someone fix this please
-            () => { return document!.querySelector(".title")!.textContent!.trim() }
+            // Using optional chaining to return handle null case, generating default name
+            () => { return document?.querySelector(".title")?.textContent?.trim() ??
+            `Video${videoUrls.indexOf(videoUrl)}`; }
         );
 
-        // Sanitize title
-        title = title.replace(/"/g, '');
+        // Implemented sanitize-filename as suggested in issue #11
+        title = sanitize(title)
+
+        if (title == "")
+            title = `Video${videoUrls.indexOf(videoUrl)}`
 
         console.log(`Video title is: ${title}`);
 
@@ -118,11 +127,11 @@ async function rentVideoForLater(videoUrls: string[], username: string, outputDi
 
         const youtubedlCmd = 'youtube-dl --no-call-home --no-warnings ' + format +
             ` --output "${outputDirectory}/${title}.mp4" --add-header Cookie:"${cookie}" "${hlsUrl}"`
-            
+
         // console.log(`\n\n[DEBUG] Invoking youtube-dl: ${youtubedlCmd}\n\n`);
         var result = execSync(youtubedlCmd, { stdio: 'inherit' });
     }
-    
+
     console.log("At this point Chrome's job is done, shutting it down...");
     await browser.close();
 }

package-lock.json

@@ -546,6 +546,14 @@
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
       "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
     },
+    "sanitize-filename": {
+      "version": "1.6.3",
+      "resolved": "https://registry.npmjs.org/sanitize-filename/-/sanitize-filename-1.6.3.tgz",
+      "integrity": "sha512-y/52Mcy7aw3gRm7IrcGDFx/bCk4AhRh2eI9luHOQM86nZsqwiRkkq2GekHXBBD+SmPidc8i2PqtYZl+pWJ8Oeg==",
+      "requires": {
+        "truncate-utf8-bytes": "^1.0.0"
+      }
+    },
     "set-blocking": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
@@ -610,6 +618,14 @@
       "resolved": "https://registry.npmjs.org/tree-kit/-/tree-kit-0.6.2.tgz",
       "integrity": "sha512-95UzJA0EMbFfu5sGUUOoXixQMUGkwu82nGM4lmqLyQl+R4H3FK+lS0nT8TZJ5x7JhSHy+saVn7/AOqh6d+tmOg=="
     },
+    "truncate-utf8-bytes": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/truncate-utf8-bytes/-/truncate-utf8-bytes-1.0.2.tgz",
+      "integrity": "sha1-QFkjkJWS1W94pYGENLC3hInKXys=",
+      "requires": {
+        "utf8-byte-length": "^1.0.1"
+      }
+    },
     "typedarray": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
@@ -625,6 +641,11 @@
       "resolved": "https://registry.npmjs.org/uniq/-/uniq-1.0.1.tgz",
       "integrity": "sha1-sxxa6CVIRKOoKBVBzisEuGWnNP8="
     },
+    "utf8-byte-length": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/utf8-byte-length/-/utf8-byte-length-1.0.4.tgz",
+      "integrity": "sha1-9F8VDExm7uloGGUFq5P8u4rWv2E="
+    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",

package.json

@@ -23,6 +23,7 @@
   },
   "dependencies": {
     "puppeteer": "^2.1.1",
+    "sanitize-filename": "^1.6.3",
     "terminal-kit": "^1.35.2",
     "typescript": "^3.8.3",
     "yargs": "^15.0.3"