Add swap quotes command and update test case names.

Author: exceptionraiser

src/commands/swap_quotes.ts

@@ -0,0 +1,52 @@
+export const swapQuotes = (str: string): string => {
+  const singleQuote = "'";
+  const doubleQuote = '"';
+
+  // Check if the string is at least two characters and starts and ends with the same quote
+  if (str.length < 2) {
+    return str; // Return as is if not properly quoted
+  }
+
+  const firstChar = str[0];
+  const lastChar = str[str.length - 1];
+
+  if (
+    (firstChar !== singleQuote && firstChar !== doubleQuote) ||
+    firstChar !== lastChar
+  ) {
+    // Not properly quoted, return as is
+    return str;
+  }
+
+  const originalQuote = firstChar;
+  const newQuote = originalQuote === singleQuote ? doubleQuote : singleQuote;
+  let content = str.slice(1, -1);
+
+  // Swap inner quotes
+  content = content.replace(/['"]/g, (match, offset) => {
+    // Determine if the quote is part of an apostrophe
+    const prevChar = content[offset - 1];
+    const nextChar = content[offset + 1];
+    const isApostrophe =
+      match === "'" &&
+      /[a-zA-Z]/.test(prevChar || "") &&
+      /[a-zA-Z]/.test(nextChar || "");
+
+    if (isApostrophe) {
+      // Handle apostrophe based on the desired output
+      if (newQuote === singleQuote) {
+        // Escape apostrophe when outer quote is single quote
+        return "\\'";
+      } else {
+        // Keep apostrophe as is when outer quote is double quote
+        return match;
+      }
+    } else {
+      // Swap the quote
+      return match === originalQuote ? newQuote : originalQuote;
+    }
+  });
+
+  // Return the new string with swapped quotes
+  return newQuote + content + newQuote;
+};