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commands/num-edit/currency.js

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+const Command = require('../../structures/Command');
+const snekfetch = require('snekfetch');
+const codes = require('../../assets/json/currency');
+
+module.exports = class CurrencyCommand extends Command {
+    constructor(client) {
+        super(client, {
+            name: 'currency',
+            group: 'num-edit',
+            memberName: 'currency',
+            description: 'Converts a number from one currency to another.',
+            details: `**Codes:** ${codes.join(', ')}`,
+            args: [
+                {
+                    key: 'base',
+                    prompt: 'What currency code do you want to use as the base?',
+                    type: 'string',
+                    validate: (base) => {
+                        if (codes.includes(base.toUpperCase())) return true;
+                        else return 'Invalid Currency Code. Use `help currency` to view a list of currency codes.';
+                    },
+                    parse: (base) => base.toUpperCase()
+                },
+                {
+                    key: 'to',
+                    prompt: 'What currency code do you want to convert to?',
+                    type: 'string',
+                    validate: (to) => {
+                        if (codes.includes(to.toUpperCase())) return true;
+                        else return 'Invalid Currency Code. Use `help currency` to view a list of currency codes.';
+                    },
+                    parse: (to) => to.toUpperCase()
+                },
+                {
+                    key: 'amount',
+                    prompt: 'How much money should be converted? Do not use symbols.',
+                    type: 'integer'
+                }
+            ]
+        });
+    }
+
+    async run(msg, args) {
+        const { base, to, amount } = args;
+        if (base === to) return msg.say(`Converting ${base} to ${to} is the same value, dummy.`);
+        const { body } = await snekfetch
+            .get('http://api.fixer.io/latest')
+            .query({
+                base,
+                symbols: to
+            });
+        return msg.say(`${amount} ${base} is ${amount * body.rates[to]} ${to}.`);
+    }
+};

commands/num-edit/math.js

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+const Command = require('../../structures/Command');
+const math = require('mathjs');
+
+module.exports = class MathCommand extends Command {
+    constructor(client) {
+        super(client, {
+            name: 'math',
+            group: 'num-edit',
+            memberName: 'math',
+            description: 'Evaluates math expressions.',
+            args: [
+                {
+                    key: 'expression',
+                    prompt: 'What do you want to answer?',
+                    type: 'string'
+                }
+            ]
+        });
+    }
+
+    run(msg, args) {
+        const { expression } = args;
+        try {
+            const solved = math.eval(expression).toString();
+            return msg.say(solved).catch(() => msg.say('Invalid Statement'));
+        } catch (err) {
+            return msg.say('Invalid Statement');
+        }
+    }
+};

commands/num-edit/temperature.js

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+const Command = require('../../structures/Command');
+
+module.exports = class TemperatureCommand extends Command {
+    constructor(client) {
+        super(client, {
+            name: 'temperature',
+            group: 'num-edit',
+            memberName: 'temperature',
+            description: 'Converts temperatures to/from Celsius, Fahrenheit, or Kelvin.',
+            args: [
+                {
+                    key: 'base',
+                    prompt: 'What temperature unit do you want to use as the base?',
+                    type: 'string',
+                    validate: (base) => {
+                        if (['celsius', 'fahrenheit', 'kelvin'].includes(base.toLowerCase())) return true;
+                        else return 'Please enter either `celsius`, `fahrenheit`, or `kelvin`.';
+                    },
+                    parse: (base) => base.toLowerCase()
+                },
+                {
+                    key: 'to',
+                    prompt: 'What temperature unit do you want to convert to?',
+                    type: 'string',
+                    validate: (to) => {
+                        if (['celsius', 'fahrenheit', 'kelvin'].includes(to.toLowerCase())) return true;
+                        else return 'Please enter either `celsius`, `fahrenheit`, or `kelvin`.';
+                    },
+                    parse: (to) => to.toLowerCase()
+                },
+                {
+                    key: 'amount',
+                    prompt: 'What temperature should be converted?',
+                    type: 'integer'
+                }
+            ]
+        });
+    }
+
+    run(msg, args) {
+        const { base, to, amount } = args;
+        if (base === to) {
+            return msg.say(`Converting ${base} to ${to} is the same value, dummy.`);
+        } else if (base === 'celsius') {
+            if (to === 'fahrenheit') return msg.say(`${amount}°C is ${(amount * 1.8) + 32}°F.`);
+            else if (to === 'kelvin') return msg.say(`${amount}°C is ${amount + 273.15}°K.`);
+        } else if (base === 'fahrenheit') {
+            if (to === 'celsius') return msg.say(`${amount}°F is ${(amount - 32) / 1.8}°C.`);
+            else if (to === 'kelvin') return msg.say(`${amount}°F is ${(amount + 459.67) * (5 / 9)}°K.`);
+        } else if (base === 'kelvin') {
+            if (to === 'celsius') return msg.say(`${amount}°K is ${amount - 273.15}°C.`);
+            else if (to === 'fahrenheit') return msg.say(`${amount}°K is ${(amount * 1.8) - 459.67}°F.`);
+        }
+    }
+};