Made a reader for Forge metadata

src/loaders/forge/forge-metadata-reader.ts

@@ -0,0 +1,16 @@
+import { parse as parseToml } from "toml";
+import { ZippedTextLoaderMetadataReader } from "@/loaders/zipped-loader-metadata-reader";
+import { MODS_TOML, RawForgeMetadata } from "./raw-forge-metadata";
+import { ForgeMetadata } from "./forge-metadata";
+
+/**
+ * A metadata reader that is able to read Forge mod metadata from a zipped file.
+ */
+export class ForgeMetadataReader extends ZippedTextLoaderMetadataReader<ForgeMetadata, RawForgeMetadata> {
+    /**
+     * Constructs a new {@link ForgeMetadataReader} instance.
+     */
+    constructor() {
+        super(MODS_TOML, ForgeMetadata.from, parseToml);
+    }
+}

tests/unit/loaders/forge/forge-metadata-reader.spec.ts

@@ -0,0 +1,41 @@
+import { zipFile } from "@/../tests/utils/zip-utils";
+import mockFs from "mock-fs";
+import { ForgeMetadata } from "@/loaders/forge/forge-metadata";
+import { ForgeMetadataReader } from "@/loaders/forge/forge-metadata-reader";
+
+beforeEach(async () => {
+    mockFs({
+        "forge.mod.jar": await zipFile([__dirname, "../../../content/forge/mods.toml"], "META-INF/mods.toml"),
+        "text.txt": "",
+    });
+});
+
+afterEach(() => {
+    mockFs.restore();
+});
+
+describe("ForgeMetadataReader", () => {
+    test("successfully reads mods.toml", async () => {
+        const reader = new ForgeMetadataReader();
+
+        const metadata = await reader.readMetadataFile("forge.mod.jar");
+
+        expect(metadata).toBeInstanceOf(ForgeMetadata);
+    });
+
+    test("returns undefined if file is not a Forge mod", async () => {
+        const reader = new ForgeMetadataReader();
+
+        const metadata = await reader.readMetadataFile("text.txt");
+
+        expect(metadata).toBeUndefined();
+    });
+
+    test("returns undefined if file does not exist", async () => {
+        const reader = new ForgeMetadataReader();
+
+        const metadata = await reader.readMetadataFile("text.json");
+
+        expect(metadata).toBeUndefined();
+    });
+});