From ca25a27ca803c7c238f7661e5e9a48397db55d16 Mon Sep 17 00:00:00 2001
From: Kir_Antipov <kp.antipov@gmail.com>
Date: Tue, 28 Mar 2023 04:55:31 +0000
Subject: [PATCH] Made a wrapper over Mojang "API"

Well, it's not really an API, but still
---
 src/games/minecraft/mojang-api-client.ts | 132 +++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 src/games/minecraft/mojang-api-client.ts

diff --git a/src/games/minecraft/mojang-api-client.ts b/src/games/minecraft/mojang-api-client.ts
new file mode 100644
index 0000000..d7cd280
--- /dev/null
+++ b/src/games/minecraft/mojang-api-client.ts
@@ -0,0 +1,132 @@
+import { Fetch, createFetch, throwOnError } from "@/utils/net";
+import { VersionRange, parseVersion } from "@/utils/versioning";
+import { $i } from "@/utils/collections";
+import { MinecraftVersion, MinecraftVersionManifest, getMinecraftVersionManifestEntries } from "./minecraft-version";
+import { getMinecraftVersionRegExp, normalizeMinecraftVersion, normalizeMinecraftVersionRange } from "./minecraft-version-lookup";
+
+/**
+ * The default base URL for the Mojang API.
+ */
+export const MOJANG_API_URL = "https://piston-meta.mojang.com/mc";
+
+/**
+ * Describes the configuration options for the Mojang API client.
+ */
+export interface MojangApiOptions {
+    /**
+     * The Fetch implementation used for making HTTP requests.
+     */
+    fetch?: Fetch;
+
+    /**
+     * The base URL for the Mojang API.
+     *
+     * Defaults to {@link MOJANG_API_URL}.
+     */
+    baseUrl?: string | URL;
+}
+
+/**
+ * A client for interacting with the Mojang API.
+ */
+export class MojangApiClient {
+    /**
+     * The Fetch implementation used for making HTTP requests.
+     */
+    private readonly _fetch: Fetch;
+
+    /**
+     * A cached map of all available Minecraft versions.
+     */
+    private _versions?: ReadonlyMap<string, MinecraftVersion>;
+
+    /**
+     * A cached regular expression for matching Minecraft version strings.
+     */
+    private _versionRegExp?: RegExp;
+
+    /**
+     * Creates a new {@link MojangApiClient} instance.
+     *
+     * @param options - The configuration options for the client.
+     */
+    constructor(options?: MojangApiOptions) {
+        this._fetch = createFetch({
+            handler: options?.fetch,
+            baseUrl: options?.baseUrl || options?.fetch?.["baseUrl"] || MOJANG_API_URL,
+        })
+        .use(throwOnError());
+    }
+
+    /**
+     * Retrieves a specific Minecraft version by its ID.
+     *
+     * @param id - The ID of the Minecraft version to retrieve.
+     *
+     * @returns A promise that resolves to the Minecraft version, or `undefined` if not found.
+     */
+    async getMinecraftVersion(id: string): Promise<MinecraftVersion | undefined> {
+        const versions = await this.getAllMinecraftVersions();
+        const version = versions.get(id);
+        if (version) {
+            return version;
+        }
+
+        const versionRange = await this.getMinecraftVersions(id);
+        return versionRange[0];
+    }
+
+    /**
+     * Retrieves a list of Minecraft versions that match the specified range.
+     *
+     * @param range - A version range to match.
+     *
+     * @returns A promise that resolves to an array of matching Minecraft versions.
+     */
+    async getMinecraftVersions(range: string | Iterable<string> | VersionRange): Promise<MinecraftVersion[]> {
+        const versions = await this.getAllMinecraftVersions();
+        const regex = await this.getMinecraftVersionRegExp();
+        const normalizedRange = normalizeMinecraftVersionRange(range, versions, regex);
+
+        return $i(versions.values()).filter(x => normalizedRange.includes(x.version)).toArray();
+    }
+
+    /**
+     * Retrieves all available Minecraft versions.
+     *
+     * @returns A promise that resolves to a map of Minecraft versions keyed by their IDs.
+     */
+    private async getAllMinecraftVersions(): Promise<ReadonlyMap<string, MinecraftVersion>> {
+        if (this._versions) {
+            return this._versions;
+        }
+
+        const response = await this._fetch("/game/version_manifest_v2.json");
+        const manifest = await response.json<MinecraftVersionManifest>();
+        const manifestEntries = getMinecraftVersionManifestEntries(manifest);
+
+        const versions = manifestEntries.map((entry, i, self) => {
+            const normalizedVersion = normalizeMinecraftVersion(entry.id, self, i);
+            const version = parseVersion(normalizedVersion);
+            return new MinecraftVersion(entry.id, version, entry.type, entry.url, entry.releaseDate);
+        });
+
+        this._versions = new Map(versions.map(x => [x.id, x]));
+        return this._versions;
+    }
+
+    /**
+     * Retrieves a regular expression for matching Minecraft version strings.
+     *
+     * @returns A promise that resolves to a `RegExp` for matching Minecraft version strings.
+     */
+    private async getMinecraftVersionRegExp(): Promise<RegExp> {
+        if (this._versionRegExp) {
+            return this._versionRegExp;
+        }
+
+        const versions = await this.getAllMinecraftVersions();
+        this._versionRegExp = getMinecraftVersionRegExp(versions.keys());
+        return this._versionRegExp;
+    }
+}