autocomplete on monitor to easily rename node

bot/commands/monitor_node.js

@@ -12,7 +12,8 @@ module.exports = {
 				.setDescription('The Node ID to monitor')
 				.setRequired(true)
 				.setMaxLength(44)
-				.setMinLength(44))
+				.setMinLength(44)
+				.setAutocomplete(true))
 		.addStringOption(option =>
 			option.setName('name')
 				.setDescription('A friendly name for the node')),
@@ -65,4 +66,17 @@ module.exports = {
 		await interaction.reply({ content: reply_string, ephemeral: eph });
 		console.log(`User ${user.id} interaction from ${eph ? 'channel' : 'dm' }: monitor ${node_id}: ${reply_string}`)
 	},
+	async autocomplete(interaction, db) {
+		const user = interaction.user;
+		const focusedValue = interaction.options.getFocused();
+
+		// Get list of nodes monitored from db
+		const monitored_nodes = await db.list_user_nodes(user.id)
+		const choices = monitored_nodes.map( entry => ({id: entry.node, text: `${entry.name} (${entry.node})`}));
+		const filtered = choices.filter(choice => choice.text.toLowerCase().includes(focusedValue.toLowerCase()));
+
+		await interaction.respond(
+			filtered.map(choice => ({ name: choice.id, value: choice.id })), // setting name: choice.text should work, but it doesn't. Asked on SO: https://stackoverflow.com/q/74532512/1486966
+		);
+	},
 };