add clearTable command, simple webpage start

src/helpers/commands/clearTable.ts

@@ -0,0 +1,40 @@
+import { parseArgs } from "@helpers/char";
+import { type ReservedSQL, sql } from "bun";
+
+(async (): Promise<void> => {
+	try {
+		const args: Record<string, string | boolean> = parseArgs();
+		const table: string | undefined = args.table as string | undefined;
+		const cascade: boolean = args.cascade === true;
+
+		if (!table) {
+			throw new Error("Missing required argument: --table <table_name>");
+		}
+
+		const reservation: ReservedSQL = await sql.reserve();
+
+		try {
+			await reservation`TRUNCATE TABLE ${sql(table)} ${cascade ? sql`CASCADE` : sql``};`;
+			console.log(
+				`Table ${table} has been cleared${cascade ? " with CASCADE" : ""}.`,
+			);
+		} catch (error) {
+			if (
+				error instanceof Error &&
+				error.message.includes("foreign key constraint")
+			) {
+				console.error(
+					`Could not clear table "${table}" due to foreign key constraints.\n` +
+						"Try using --cascade if you want to remove dependent records.",
+				);
+			} else {
+				console.error("Could not clear table:", error);
+			}
+		} finally {
+			reservation.release();
+		}
+	} catch (error) {
+		console.error("Unexpected error:", error);
+		process.exit(1);
+	}
+})();