리펙토링: 코드 최적화

lib/engine/variable-parenthesis.ts

@@ -6,6 +6,7 @@ import type {
   VariableUserAnswer,
   VariableGradeResult,
 } from "./variable-types";
+import { formatParenthesisExpressionLatex } from "./parenthesis-latex";
 
 const MIN_MULTIPLIER = -9;
 const MAX_MULTIPLIER = -1;
@@ -95,10 +96,6 @@ export function formatVariableTermLatex(
   return `${term.coefficient}x`;
 }
 
-function formatParenthesisTermLatex(term: VariableParenthesisTerm) {
-  return formatVariableTermLatex(term);
-}
-
 export function formatVariableExpressionLatex(
   terms: DistributedVariableTerm[],
 ) {
@@ -164,8 +161,6 @@ function createChoices(
 
 function createProblem(seed: VariableProblemSeed): VariableParenthesisProblem {
   const { multiplier, terms, operators } = seed;
-  const [firstTerm, secondTerm] = terms;
-  const [operator] = operators;
   const key = [
     multiplier,
     ...terms.flatMap((term, index) =>
@@ -189,18 +184,14 @@ function createProblem(seed: VariableProblemSeed): VariableParenthesisProblem {
     multiplier,
     terms,
     operators,
-    operator,
-    firstTerm,
-    secondTerm,
     correctTerms,
     choices,
-    latexBefore: `${multiplier}\\left(${terms
-      .map((term, index) => {
-        if (index === 0) return formatParenthesisTermLatex(term);
-
-        return `${operators[index - 1]} ${formatParenthesisTermLatex(term)}`;
-      })
-      .join(" ")}\\right)`,
+    latexBefore: formatParenthesisExpressionLatex({
+      multiplier,
+      terms,
+      operators,
+      formatTermLatex: formatVariableTermLatex,
+    }),
     latexAfter: formatVariableExpressionLatex(correctTerms),
   };
 }