Add openBlocks API

index.js

@@ -612,6 +612,39 @@ app.get("/api/v1/directory", (req, res) => {
 	});
 });
 
+// Function to find open number blocks
+app.get("/api/v1/directory/openBlocks", (req, res) => {
+	const invalidBlocks = [
+		// Emergency number prefixes (112, 911, 999, 110, 117, 119, 113, 191, 111)
+		1120000, 9110000, 9990000, 1100000, 1170000, 1190000, 1130000, 1910000, 1110000
+	]
+	pool.query("SELECT block_start, block_length FROM routes").then((rows) => {
+		const takenBlocks = rows.map(row => {
+			return { start: row.block_start, end: row.block_start + row.block_length };
+		});
+		const openBlocks = [];
+		for (let i = 100000; i <= 9999999; i += 10000) {
+			const blockStart = i;
+			const blockEnd = i + 9999;
+			// Check if block is invalid
+			if (invalidBlocks.includes(blockStart)) {
+				continue;
+			}
+			// Check if block overlaps with any taken blocks
+			const overlap = takenBlocks.some(taken => {
+				return (blockStart <= taken.end && blockEnd >= taken.start);
+			});
+			if (!overlap) {
+				openBlocks.push(blockStart);
+			}
+		}
+		res.json(openBlocks);
+	}).catch(err => {
+		console.error('Error getting open blocks:', err);
+		res.status(500).json({ error: 'Internal server error' });
+	});
+});
+
 // Other public endpoints that need special handling
 discordInviteCache = { time: 0, url: "" };