✨ Verify solidpkg file for correctness

src/interfaces/ISolidFile.ts

@@ -0,0 +1,37 @@
+interface ISolidFile {
+  //TODO
+}
+
+interface ISolidFileInfo {
+  /** List of files that are part of this torrent. */
+  files: ISolidFile[];
+  /** Length of one piece in bytes, e.g. 4194304 for 4 MB. */
+  'piece length': number;
+  /** Concatenated hashes of all pieces. */
+  pieces: string;
+  /** Whether the torrent is private, always 0. */
+  private: 0 | 1;
+  /** Whether the torrent is closed, always 1. */
+  closed: 0 | 1;
+  /** Unique ID of this torrent, e.g. '85ff8715-d1ce-4320-805c-bea80b6dd03c' */
+  uniqueid: string;
+}
+
+interface ISolid {
+  /** Timestamp when this torrent was created, given in seconds since 1970. Can be read with `new Date(... * 1000)`. */
+  'creation date': number;
+  /** Internal tracker URL used to announce this torrent. */
+  announce: string;
+  /** Title of this torrent in the format `${product}: ${from}to${to}` */
+  title: string;
+  /** Unknown integer, always 16097. */
+  networkgroupid: number;
+  /** The URL where the files from this torrent are stored, in the format `http://cdn-patch.swtor.com/patch/${product}/${product}_${from}to${to}/` */
+  reliable: string;
+  /** Always '0' */
+  'reliable-id': string;
+  /** Contains further information about this torrent, including the list of files. */
+  info: ISolidFileInfo;
+}
+
+export default ISolid;

src/ssn/getSolidpkg.ts

@@ -1,9 +1,11 @@
 import getUrlContents from '../getUrlContents';
 import { Product } from '../interfaces/ISettings';
+import ISolid from '../interfaces/ISolidFile';
 import verifyProductName from '../ssn/verifyProductName';
 import bpParse from './bencodeParser';
 import extractFile from './extractFile';
 import readSsnFile from './readSsnFile';
+import verifySolidpkg from './verifySolidpkg';
 
 export default async function getSolidpkg(product: Product, from: number, to: number): Promise<any> {
   //Verify function arguments
@@ -37,7 +39,15 @@ export default async function getSolidpkg(product: Product, from: number, to: nu
 
   //Extract metafile.solid file
   const solidFile = await extractFile(firstFile, [new DataView(ssnFile)]);
-  const solidContents = bpParse(new DataView(solidFile)).obj;
+  const solidContents = bpParse(new DataView(solidFile)).obj as ISolid;
 
-  return solidContents;
+  //Verify metafile.solid for correctness
+  verifySolidpkg(solidContents, { product, from, to });
+
+  return {
+    created: new Date(solidContents['creation date'] * 1000),
+    files: solidContents.info.files,
+    pieceLength: solidContents.info['piece length'],
+    //pieces: solidContents.info.pieces,
+  };
 }

src/ssn/verifySolidpkg.ts

@@ -0,0 +1,45 @@
+import ISolid from '../interfaces/ISolidFile';
+
+/** Verifies metafile.solid for correctness. */
+export default function verifySolidpkg(file: ISolid, { product, from, to }: {product: string, from: number, to: number}) {
+  if (typeof file['creation date'] !== 'number') {
+    throw new Error(`Expected creation date to be a number but it was "${file['creation date']}".`);
+  }
+  if (file.announce !== 'http://Tracker22.fda5b1cf-eac6-402b-9ebf-17bc381314aa.automated.ssntracker.int:80/') {
+    throw new Error(`Expected announce URL but it was "${file.announce}".`);
+  }
+  if (file.title !== `${product}: ${from}to${to}`) {
+    throw new Error(`Expected title "${product}: ${from}to${to}" but it was "${file.title}".`);
+  }
+  if (file.networkgroupid !== 16097) {
+    throw new Error(`Expected networkgroupid 16097 but it was "${file.networkgroupid}".`);
+  }
+  if (file.reliable !== `http://cdn-patch.swtor.com/patch/${product}/${product}_${from}to${to}/`) {
+    throw new Error(`Expected reliable URL but it was "${file.reliable}".`);
+  }
+  if (file['reliable-id'] !== '0') {
+    throw new Error(`Expected reliable-id to be "0" but it was "${file['reliable-id']}".`);
+  }
+
+  if (file.info === undefined) {
+    throw new Error(`Expected info field but it was missing.`);
+  }
+
+  //TODO: read file.info.files
+
+  if (file.info['piece length'] !== 4194304) {
+    throw new Error(`Expected piece length to be "4194304" but it was "${file.info['piece length']}".`);
+  }
+  if (typeof file.info.pieces !== 'string') {
+    throw new Error(`Expected pieces to be a string but it was "${file.info.pieces}".`);
+  }
+  if (file.info.private !== 0) {
+    throw new Error(`Expected file to not be private ("0") but it was "${file.info.private}".`);
+  }
+  if (file.info.closed !== 1) {
+    throw new Error(`Expected file to be closed ("1") but it was "${file.info.closed}".`);
+  }
+  if (typeof file.info.uniqueid !== 'string') {
+    throw new Error(`Expected uniqueid to be a string but it was "${file.info.uniqueid}".`);
+  }
+}