Add countChars function

commands/countChars.ts

@@ -0,0 +1,37 @@
+const { SlashCommandBuilder, Discord } = require('discord.js');
+
+module.exports = {
+	data: new SlashCommandBuilder()
+		.setName('count_chars')
+		.setDescription('Counts the number of characters in a string')
+		.addStringOption( option =>
+			option.setName('string')
+			.setDescription("String to count characters in")
+			.setRequired(true)
+			),
+	async execute(interaction) {
+		var inputString = interaction.options.getString('string');
+		await interaction.reply(countChars(inputString));
+        console.log("User " + interaction.user.tag + " ran /count_chars");
+	},
+};
+
+function countChars(string) {
+	var outputString = "";
+	string = string.toLowerCase();
+	var letterCount = Array(26).fill(0); // Creates an array with 26 values, all equaling 0.
+	for (let i = 0; i < string.length; ++i) {
+		let currentChar = string.charAt(i);
+		let arrayIndex = currentChar.charCodeAt(0) - 97;
+		if (string.charAt(i).search(/^[a-z]+$/) === 0)  {
+			letterCount[arrayIndex]++;
+		}
+	}
+	for (let i = 0; i < letterCount.length; ++i) {
+		if (letterCount[i] > 0) {
+				outputString += "Number of " + String.fromCharCode(i + 97).toUpperCase() + "'s: " + letterCount[i] + "\n"; 
+		}
+	}
+	return outputString;
+}
+//console.log(countChars("test string"));