From 0da00d434af644dd0ac32dc4a7a434ed42572436 Mon Sep 17 00:00:00 2001
From: Kir_Antipov <kp.antipov@gmail.com>
Date: Tue, 14 Mar 2023 11:07:14 +0000
Subject: [PATCH] Made a reader for Forge metadata

---
 src/loaders/forge/forge-metadata-reader.ts    | 16 ++++++++
 .../forge/forge-metadata-reader.spec.ts       | 41 +++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 src/loaders/forge/forge-metadata-reader.ts
 create mode 100644 tests/unit/loaders/forge/forge-metadata-reader.spec.ts

diff --git a/src/loaders/forge/forge-metadata-reader.ts b/src/loaders/forge/forge-metadata-reader.ts
new file mode 100644
index 0000000..8172baa
--- /dev/null
+++ b/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);
+    }
+}
diff --git a/tests/unit/loaders/forge/forge-metadata-reader.spec.ts b/tests/unit/loaders/forge/forge-metadata-reader.spec.ts
new file mode 100644
index 0000000..ea0f34b
--- /dev/null
+++ b/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();
+    });
+});