refactor(federation): ♻️ Replace WebFinger code with @lysand-org/federation logic, add new debug command

cli/commands/federation/user/fetch.ts

@@ -0,0 +1,51 @@
+import { SignatureConstructor } from "@lysand-org/federation";
+import { FederationRequester } from "@lysand-org/federation/requester";
+import { Args } from "@oclif/core";
+import chalk from "chalk";
+import ora from "ora";
+import { BaseCommand } from "~/cli/base";
+import { User } from "~/packages/database-interface/user";
+
+export default class FederationUserFetch extends BaseCommand<
+    typeof FederationUserFetch
+> {
+    static override args = {
+        address: Args.string({
+            description: "Address of remote user (name@host.com)",
+            required: true,
+        }),
+    };
+
+    static override description = "Fetch the URL of remote users via WebFinger";
+
+    static override examples = ["<%= config.bin %> <%= command.id %>"];
+
+    static override flags = {};
+
+    public async run(): Promise<void> {
+        const { args } = await this.parse(FederationUserFetch);
+
+        const spinner = ora("Fetching user URI").start();
+
+        const [username, host] = args.address.split("@");
+
+        const requester = await User.getServerActor();
+
+        const signatureConstructor = await SignatureConstructor.fromStringKey(
+            requester.data.privateKey ?? "",
+            requester.getUri(),
+        );
+        const manager = new FederationRequester(
+            new URL(`https://${host}`),
+            signatureConstructor,
+        );
+
+        const uri = await manager.webFinger(username);
+
+        spinner.succeed("Fetched user URI");
+
+        this.log(`URI: ${chalk.blueBright(uri)}`);
+
+        this.exit(0);
+    }
+}