refactor: ♻️ Store instance federation protocol in database, refactor fetcher

cli/commands/federation/instance/fetch.ts

@@ -0,0 +1,48 @@
+import { Args } from "@oclif/core";
+import ora from "ora";
+import { BaseCommand } from "~/cli/base";
+import { formatArray } from "~/cli/utils/format";
+import { Instance } from "~/packages/database-interface/instance";
+
+export default class FederationInstanceFetch extends BaseCommand<
+    typeof FederationInstanceFetch
+> {
+    static override args = {
+        url: Args.string({
+            description: "URL of the remote instance",
+            required: true,
+        }),
+    };
+
+    static override description = "Fetch metadata from remote instances";
+
+    static override examples = ["<%= config.bin %> <%= command.id %>"];
+
+    static override flags = {};
+
+    public async run(): Promise<void> {
+        const { args } = await this.parse(FederationInstanceFetch);
+
+        const spinner = ora("Fetching instance metadata").start();
+
+        const data = await Instance.fetchMetadata(args.url);
+
+        if (!data) {
+            spinner.fail("Failed to fetch instance metadata");
+            this.exit(1);
+        }
+
+        spinner.succeed("Fetched instance metadata");
+
+        const { metadata, protocol } = data;
+
+        this.log(
+            formatArray(
+                [{ ...metadata, protocol }],
+                ["name", "description", "version", "protocol"],
+            ),
+        );
+
+        this.exit(0);
+    }
+}