make hashformat a string enum

src/hashFormat.ts

@@ -0,0 +1,15 @@
+export enum HashFormat {
+  "sha256" = "sha256",
+  "sha512" = "sha512",
+  "sha1" = "sha1",
+  "md5" = "md5",
+  "murmur2" = "murmur2",
+}
+
+export function isValidHashFormat(hashFormat: string): HashFormat {
+  if (hashFormat in HashFormat) {
+    return HashFormat[hashFormat as keyof typeof HashFormat];
+  } else {
+    throw new Error("Invalid index file hash format!");
+  }
+}

src/parser.ts

@@ -6,6 +6,7 @@ import {
   CurseForgeProvider,
   GitHubProvider,
 } from "./provider";
+import { HashFormat, isValidHashFormat } from "./hashFormat";
 
 export interface Metafile {
   name: string;
@@ -25,18 +26,20 @@ export interface Option {
  * Represents a file entry in the Packwiz index.
  */
 export class IndexFileEntry {
-  readonly file: Resource;
-  readonly hash: string;
-  readonly metafile: boolean;
-
   constructor(
-    file: string | Resource,
+    readonly file: Resource,
-    hash: string,
+    readonly hash: string,
-    metafile: boolean = false,
+    readonly hashFormat: HashFormat,
+    readonly alias?: string,
+    readonly metafile: boolean = false,
+    readonly preserve: boolean = false,
   ) {
     this.file = file instanceof Resource ? file : new Resource(file);
     this.hash = hash;
+    this.hashFormat = isValidHashFormat(hashFormat);
+    this.alias = alias;
     this.metafile = metafile;
+    this.preserve = preserve;
   }
 
   async parse(): Promise<Metafile> {
@@ -67,7 +70,7 @@ export class IndexFileEntry {
     if (parsed.update?.modrinth) {
       return new ModrinthProvider(
         parsed.download.hash,
-        parsed.download["hash-format"],
+        isValidHashFormat(parsed.download["hash-format"]),
         new Resource(parsed.download.url),
         parsed.update.modrinth["mod-id"],
         parsed.update.modrinth["version"],
@@ -75,7 +78,7 @@ export class IndexFileEntry {
     } else if (parsed.update?.curseforge) {
       return new CurseForgeProvider(
         parsed.download.hash,
-        parsed.download["hash-format"],
+        isValidHashFormat(parsed.download["hash-format"]),
         parsed.download.mode,
         parsed.update.curseforge["file-id"],
         parsed.update.curseforge["project-id"],
@@ -83,7 +86,7 @@ export class IndexFileEntry {
     } else if (parsed.update?.github) {
       return new GitHubProvider(
         parsed.download.hash,
-        parsed.download["hash-format"],
+        isValidHashFormat(parsed.download["hash-format"]),
         new Resource(parsed.download.url),
         parsed.update.github.branch,
         parsed.update.github.regex,
@@ -93,7 +96,7 @@ export class IndexFileEntry {
     } else if (parsed.download) {
       return new UrlProvider(
         parsed.download.hash,
-        parsed.download["hash-format"],
+        isValidHashFormat(parsed.download["hash-format"]),
         new Resource(parsed.download.url),
       );
     } else {
@@ -107,7 +110,7 @@ export class IndexFileEntry {
  */
 export interface PackwizIndex {
   location: Resource;
-  hashFormat: string;
+  hashFormat: HashFormat;
   files: IndexFileEntry[];
 }
 
@@ -125,16 +128,28 @@ export async function parsePackwizIndex(
 ): Promise<PackwizIndex> {
   const indexFile = new Resource(indexFilePath);
   const parsed = toml.parse(await indexFile.fetchContents());
+  const hashFormat = isValidHashFormat(parsed["hash-format"]);
   return {
     location: indexFile,
-    hashFormat: parsed["hash-format"],
+    hashFormat: hashFormat,
     files: parsed.files.map(
-      (file: any) =>
+      (file: {
-        new IndexFileEntry(
+        file: string;
+        hash: string;
+        hashFormat: HashFormats;
+        alias?: string;
+        metafile?: boolean;
+        preserve?: boolean;
+      }) => {
+        return new IndexFileEntry(
           indexFile.parent.join(file.file),
           file.hash,
-          file.metafile,
+          file.hashFormat || hashFormat,
-        ),
+          file.alias,
+          file.metafile ?? false,
+          file.preserve ?? false,
+        );
+      },
     ),
   };
 }

src/provider.ts

@@ -1,9 +1,10 @@
 import Resource from "./resource";
+import { HashFormat } from "./hashFormat";
 
 export class UrlProvider {
   constructor(
     public hash: string,
-    public hashFormat: string,
+    public hashFormat: HashFormat,
     public url: Resource,
   ) {}
 }
@@ -11,7 +12,7 @@ export class UrlProvider {
 export class ModrinthProvider extends UrlProvider {
   constructor(
     hash: string,
-    hashFormat: string,
+    hashFormat: HashFormat,
     url: Resource,
     public modId: string,
     public versionId: string,
@@ -23,7 +24,7 @@ export class ModrinthProvider extends UrlProvider {
 export class GitHubProvider extends UrlProvider {
   constructor(
     hash: string,
-    hashFormat: string,
+    hashFormat: HashFormat,
     url: Resource,
     public branch: string,
     public regex: string,
@@ -37,7 +38,7 @@ export class GitHubProvider extends UrlProvider {
 export class CurseForgeProvider extends UrlProvider {
   constructor(
     hash: string,
-    hashFormat: string,
+    hashFormat: HashFormat,
     public mode: string,
     public fileId: number,
     public projectId: number,