Modularization, some rudimentary cleanup

discord-utils.mjs

@@ -0,0 +1,37 @@
+
+export function split_discord_message(text) {
+	const MAX = 1900;        // maximum payload size
+	const MIN = 100;         // avoid tiny chunks
+	const chunks = [];
+	let start = 0;
+
+	while (start < text.length) {
+		let end = Math.min(start + MAX, text.length);
+
+		// Try to break on a newline first, then on a space
+		if (end < text.length) {
+			const nl = text.lastIndexOf('\n', end);
+			const sp = text.lastIndexOf(' ', end);
+			const splitPos = Math.max(nl, sp);
+			if (splitPos > start) end = splitPos + 1; // keep the delimiter
+		}
+
+		// If the chunk is too short, pull in the next delimiter
+		if (end - start < MIN && end < text.length) {
+			const nextNL = text.indexOf('\n', end);
+			const nextSP = text.indexOf(' ', end);
+			const nextPos = Math.min(
+				nextNL === -1 ? Infinity : nextNL,
+				nextSP === -1 ? Infinity : nextSP
+			);
+			if (nextPos !== Infinity && nextPos < text.length) {
+				end = nextPos + 1;
+			}
+		}
+
+		chunks.push(text.slice(start, end));
+		start = end;
+	}
+
+	return chunks;
+}