refactor a ton of the admin room code (50% done)

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/service/admin/appservice/mod.rs

@@ -0,0 +1,52 @@
+use clap::Subcommand;
+use ruma::events::room::message::RoomMessageEventContent;
+
+use self::appservice_command::{list, register, show, unregister};
+use crate::Result;
+
+pub(crate) mod appservice_command;
+
+#[cfg_attr(test, derive(Debug))]
+#[derive(Subcommand)]
+pub(crate) enum AppserviceCommand {
+	/// - Register an appservice using its registration YAML
+	///
+	/// This command needs a YAML generated by an appservice (such as a bridge),
+	/// which must be provided in a Markdown code block below the command.
+	///
+	/// Registering a new bridge using the ID of an existing bridge will replace
+	/// the old one.
+	Register,
+
+	/// - Unregister an appservice using its ID
+	///
+	/// You can find the ID using the `list-appservices` command.
+	Unregister {
+		/// The appservice to unregister
+		appservice_identifier: String,
+	},
+
+	/// - Show an appservice's config using its ID
+	///
+	/// You can find the ID using the `list-appservices` command.
+	Show {
+		/// The appservice to show
+		appservice_identifier: String,
+	},
+
+	/// - List all the currently registered appservices
+	List,
+}
+
+pub(crate) async fn process(command: AppserviceCommand, body: Vec<&str>) -> Result<RoomMessageEventContent> {
+	Ok(match command {
+		AppserviceCommand::Register => register(body).await?,
+		AppserviceCommand::Unregister {
+			appservice_identifier,
+		} => unregister(body, appservice_identifier).await?,
+		AppserviceCommand::Show {
+			appservice_identifier,
+		} => show(body, appservice_identifier).await?,
+		AppserviceCommand::List => list(body).await?,
+	})
+}