Exposing numbers game solver through command.

src/games/numbers.js

@@ -336,7 +336,7 @@ function start(context, numbers) {
 	context.sendMessage('Let\'s play the numbers! Would you like a large number or a small one?', context.room.id);
 }
 
-function solve(calculation, context) {
+function calc(calculation, context) {
 	try {
 		const parsed = math.parse(calculation.replace(/`/g, '')); // backticks may be used to prevent the expression from being expanded by Markdown in SChat
 		const answer = parsed.evaluate();
@@ -347,6 +347,46 @@ function solve(calculation, context) {
 	}
 }
 
+async function solve(equation, context) {
+	const [numberString, targetString] = equation.split('=');
+	const numbers = numberString?.split(' ').map((string) => Number(string)).filter(Boolean);
+	const target = Number(targetString);
+
+	if (!numberString || !target) {
+		context.sendMessage('The input should be in the form 1 2 3 4 5 6 7 = 10', context.room.id);
+		return;
+	}
+
+	if (numbers.length < 2 || numbers.length > 7) {
+		context.sendMessage('The selection should contain at least 2 and at most 7 numbers', context.room.id);
+		return;
+	}
+
+	if (target < 100 || target > 999) {
+		context.sendMessage('The target must be a number between 100 and 999', context.room.id);
+		return;
+	}
+
+	try {
+		const solutions = await solveAll(numbers, target, 3);
+		const bestSolution = solutions.reduce((closest, solution) => (!closest || Math.abs(target - solution.answer) < Math.abs(target - closest.answer) ? solution : closest), null);
+
+		if (!bestSolution) {
+			context.sendMessage(`I could not find a solution for ${numbers.join(' ')} = ${target} :(`, context.room.id);
+			return;
+		}
+
+		if (bestSolution.answer === target) {
+			context.sendMessage(`My best solution for ${numbers.join(' ')} = ${target} is: ${bestSolution.solution}`, context.room.id);
+			return;
+		}
+
+		context.sendMessage(`I could not find an exact solution for ${numbers.join(' ')} = ${target}. My closest solution is: ${bestSolution.solution} = ${bestSolution.answer}`, context.room.id);
+	} catch (error) {
+		console.log(error);
+	}
+}
+
 function onCommand(args, context) {
 	if (context.subcommand === 'stop') {
 		stop(context, true);
@@ -358,7 +398,12 @@ function onCommand(args, context) {
 		return;
 	}
 
-	if (['calculate', 'calc', 'solve'].includes(context.subcommand || context.command)) {
+	if (['calculate', 'calc'].includes(context.subcommand || context.command)) {
+		calc(args.join(' '), context); // two from the top, four from the bottom, please Rachel
+		return;
+	}
+
+	if (['solve'].includes(context.subcommand || context.command)) {
 		solve(args.join(' '), context); // two from the top, four from the bottom, please Rachel
 		return;
 	}