dist/server/chat-plugins/calculator.js.map

{
  "version": 3,
  "sources": ["../../../server/chat-plugins/calculator.ts"],
  "sourcesContent": ["import { Utils } from '../../lib';\n\ntype Operator = '^' | 'negative' | '%' | '/' | '*' | '+' | '-' | '(';\ninterface Operators {\n\tprecedence: number;\n\tassociativity: \"Left\" | \"Right\";\n}\n\nconst OPERATORS: { [k in Operator]: Operators } = {\n\t\"^\": {\n\t\tprecedence: 5,\n\t\tassociativity: \"Right\",\n\t},\n\t\"negative\": {\n\t\tprecedence: 4,\n\t\tassociativity: \"Right\",\n\t},\n\t\"%\": {\n\t\tprecedence: 3,\n\t\tassociativity: \"Left\",\n\t},\n\t\"/\": {\n\t\tprecedence: 3,\n\t\tassociativity: \"Left\",\n\t},\n\t\"*\": {\n\t\tprecedence: 3,\n\t\tassociativity: \"Left\",\n\t},\n\t\"+\": {\n\t\tprecedence: 2,\n\t\tassociativity: \"Left\",\n\t},\n\t\"-\": {\n\t\tprecedence: 2,\n\t\tassociativity: \"Left\",\n\t},\n\t\"(\": {\n\t\tprecedence: 1,\n\t\tassociativity: \"Right\",\n\t},\n};\n\nconst BASE_PREFIXES: { [base: number]: string } = {\n\t2: \"0b\",\n\t8: \"0o\",\n\t10: \"\",\n\t16: \"0x\",\n};\n\nfunction parseMathematicalExpression(infix: string) {\n\t// Shunting-yard Algorithm -- https://en.wikipedia.org/wiki/Shunting-yard_algorithm\n\tconst outputQueue: string[] = [];\n\tconst operatorStack: Operator[] = [];\n\tinfix = infix.replace(/\\s+/g, \"\");\n\tconst infixArray = infix.split(/([+\\-*/%^()])/).filter(token => token);\n\tlet isExprExpected = true;\n\tfor (const token of infixArray) {\n\t\tif (isExprExpected && \"+-\".includes(token)) {\n\t\t\tif (token === '-') operatorStack.push('negative');\n\t\t} else if (\"^%*/+-\".includes(token)) {\n\t\t\tif (isExprExpected) throw new SyntaxError(`Got \"${token}\" where an expression should be`);\n\t\t\tconst op = OPERATORS[token as Operator];\n\t\t\tlet prevToken = operatorStack[operatorStack.length - 1] || '(';\n\t\t\tlet prevOp = OPERATORS[prevToken];\n\t\t\twhile (op.associativity === \"Left\" ? op.precedence <= prevOp.precedence : op.precedence < prevOp.precedence) {\n\t\t\t\toutputQueue.push(operatorStack.pop()!);\n\t\t\t\tprevToken = operatorStack[operatorStack.length - 1] || '(';\n\t\t\t\tprevOp = OPERATORS[prevToken];\n\t\t\t}\n\t\t\toperatorStack.push(token as Operator);\n\t\t\tisExprExpected = true;\n\t\t} else if (token === \"(\") {\n\t\t\tif (!isExprExpected) throw new SyntaxError(`Got \"(\" where an operator should be`);\n\t\t\toperatorStack.push(token as Operator);\n\t\t\tisExprExpected = true;\n\t\t} else if (token === \")\") {\n\t\t\tif (isExprExpected) throw new SyntaxError(`Got \")\" where an expression should be`);\n\t\t\twhile (operatorStack.length && operatorStack[operatorStack.length - 1] !== \"(\") {\n\t\t\t\toutputQueue.push(operatorStack.pop()!);\n\t\t\t}\n\t\t\toperatorStack.pop();\n\t\t\tisExprExpected = false;\n\t\t} else {\n\t\t\tif (!isExprExpected) throw new SyntaxError(`Got \"${token}\" where an operator should be`);\n\t\t\toutputQueue.push(token);\n\t\t\tisExprExpected = false;\n\t\t}\n\t}\n\tif (isExprExpected) throw new SyntaxError(`Input ended where an expression should be`);\n\twhile (operatorStack.length > 0) {\n\t\tconst token = operatorStack.pop()!;\n\t\tif (token === '(') continue;\n\t\toutputQueue.push(token);\n\t}\n\treturn outputQueue;\n}\n\nfunction solveRPN(rpn: string[]): [number, number] {\n\tlet base = 10;\n\tconst resultStack: number[] = [];\n\tfor (let token of rpn) {\n\t\tif (token === 'negative') {\n\t\t\tif (!resultStack.length) throw new SyntaxError(`Unknown syntax error`);\n\t\t\tresultStack.push(-resultStack.pop()!);\n\t\t} else if (!\"^%*/+-\".includes(token)) {\n\t\t\tif (token.endsWith('h')) {\n\t\t\t\t// Convert h suffix for hexadecimal to 0x prefix\n\t\t\t\ttoken = `0x${token.slice(0, -1)}`;\n\t\t\t} else if (token.endsWith('o')) {\n\t\t\t\t// Convert o suffix for octal to 0o prefix\n\t\t\t\ttoken = `0o${token.slice(0, -1)}`;\n\t\t\t} else if (token.endsWith('b')) {\n\t\t\t\t// Convert b suffix for binary to 0b prefix\n\t\t\t\ttoken = `0b${token.slice(0, -1)}`;\n\t\t\t}\n\t\t\tif (token.startsWith('0x')) base = 16;\n\t\t\tif (token.startsWith('0b')) base = 2;\n\t\t\tif (token.startsWith('0o')) base = 8;\n\t\t\tlet num = Number(token);\n\t\t\tif (isNaN(num) && token.toUpperCase() in Math) {\n\t\t\t\t// @ts-expect-error Math consts should be safe\n\t\t\t\tnum = Math[token.toUpperCase()];\n\t\t\t}\n\t\t\tif (isNaN(num) && token !== 'NaN') {\n\t\t\t\tthrow new SyntaxError(`Unrecognized token ${token}`);\n\t\t\t}\n\t\t\tresultStack.push(num);\n\t\t} else {\n\t\t\tif (resultStack.length < 2) throw new SyntaxError(`Unknown syntax error`);\n\t\t\tconst a = resultStack.pop()!;\n\t\t\tconst b = resultStack.pop()!;\n\t\t\tswitch (token) {\n\t\t\tcase \"+\":\n\t\t\t\tresultStack.push(a + b);\n\t\t\t\tbreak;\n\t\t\tcase \"-\":\n\t\t\t\tresultStack.push(b - a);\n\t\t\t\tbreak;\n\t\t\tcase \"*\":\n\t\t\t\tresultStack.push(a * b);\n\t\t\t\tbreak;\n\t\t\tcase \"/\":\n\t\t\t\tresultStack.push(b / a);\n\t\t\t\tbreak;\n\t\t\tcase \"%\":\n\t\t\t\tresultStack.push(b % a);\n\t\t\t\tbreak;\n\t\t\tcase \"^\":\n\t\t\t\tresultStack.push(b ** a);\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\t}\n\tif (resultStack.length !== 1) throw new SyntaxError(`Unknown syntax error`);\n\treturn [resultStack.pop()!, base];\n}\n\nexport const commands: Chat.ChatCommands = {\n\tmath: \"calculate\",\n\tcalculate(target, room, user) {\n\t\tif (!target) return this.parse('/help calculate');\n\n\t\tlet base = 0;\n\t\tconst baseMatchResult = (/\\b(?:in|to)\\s+([a-zA-Z]+)\\b/).exec(target);\n\t\tif (baseMatchResult) {\n\t\t\tswitch (toID(baseMatchResult[1])) {\n\t\t\tcase 'decimal': case 'dec': base = 10; break;\n\t\t\tcase 'hexadecimal': case 'hex': base = 16; break;\n\t\t\tcase 'octal': case 'oct': base = 8; break;\n\t\t\tcase 'binary': case 'bin': base = 2; break;\n\t\t\tdefault:\n\t\t\t\treturn this.errorReply(`Unrecognized base \"${baseMatchResult[1]}\". Valid options are binary or bin, octal or oct, decimal or dec, and hexadecimal or hex.`);\n\t\t\t}\n\t\t}\n\t\tconst expression = target.replace(/\\b(in|to)\\s+([a-zA-Z]+)\\b/g, '').trim();\n\n\t\tif (!this.runBroadcast()) return;\n\t\ttry {\n\t\t\tconst [result, inferredBase] = solveRPN(parseMathematicalExpression(expression));\n\t\t\tif (!base) base = inferredBase;\n\t\t\tlet baseResult = '';\n\t\t\tif (Number.isFinite(result) && base !== 10) {\n\t\t\t\tbaseResult = `${BASE_PREFIXES[base]}${result.toString(base).toUpperCase()}`;\n\t\t\t\tif (baseResult === expression) baseResult = '';\n\t\t\t}\n\t\t\tlet resultStr = '';\n\t\t\tconst resultTruncated = parseFloat(result.toPrecision(15));\n\t\t\tlet resultDisplay = resultTruncated.toString();\n\t\t\tif (resultTruncated > 10 ** 15) {\n\t\t\t\tresultDisplay = resultTruncated.toExponential();\n\t\t\t}\n\t\t\tif (baseResult) {\n\t\t\t\tresultStr = `<strong>${baseResult}</strong> = ${resultDisplay}`;\n\t\t\t} else {\n\t\t\t\tresultStr = `<strong>${resultDisplay}</strong>`;\n\t\t\t}\n\t\t\tthis.sendReplyBox(`${expression}<br />= ${resultStr}`);\n\t\t} catch (e: any) {\n\t\t\tthis.sendReplyBox(\n\t\t\t\tUtils.html`${expression}<br />= <span class=\"message-error\"><strong>Invalid input:</strong> ${e.message}</span>`\n\t\t\t);\n\t\t}\n\t},\n\tcalculatehelp: [\n\t\t`/calculate [arithmetic question] - Calculates an arithmetical question. Supports PEMDAS (Parenthesis, Exponents, Multiplication, Division, Addition and Subtraction), pi and e.`,\n\t\t`/calculate [arithmetic question] in [base] - Returns the result in a specific base. [base] can be bin, oct, dec or hex.`,\n\t],\n};\n"],
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