feat: change evaluation now adds case transformation for capture groups

util/caseManagement.ts

@@ -11,9 +11,45 @@ function lowerToTrainCase(str: string) {
   );
 }
 
-function lowerToCamelCase(str: string) {
-  return str.trim().replace(/(?:\s)\w/g, (match) => match.toUpperCase())
-    .replaceAll(" ", "");
+/**
+ * @param str
+ * @returns camelCased string (single letter words are lower cased, e.g. SSN -> ssn)
+ */
+function lowerToCamelCase(str: string): string {
+  const words = str.trim().split(/\s+/);
+  const result: string[] = [];
+  let i = 0;
+
+  while (i < words.length) {
+    if (words[i].length === 1) {
+      // We’ve hit the start of a chain of single-letter words
+      let j = i;
+      while (j < words.length && words[j].length === 1) {
+        j++;
+      }
+      const chainIsAtStart = i === 0;
+      // Process that entire chain
+      for (let k = i; k < j; k++) {
+        result[k] = chainIsAtStart
+          ? words[k].toLowerCase()
+          : words[k].toUpperCase();
+      }
+      i = j;
+    } else {
+      // Normal multi-letter word
+      if (i === 0) {
+        // first word: all lower
+        result[i] = words[i].toLowerCase();
+      } else {
+        // subsequent words: capitalize first letter
+        result[i] = words[i][0].toUpperCase() +
+          words[i].slice(1).toLowerCase();
+      }
+      i++;
+    }
+  }
+
+  return result.join("");
 }
 
 function lowerToSnakeCase(str: string) {
@@ -88,10 +124,10 @@ function coerceCaseToLower(str: string, caseType: CaseType) {
     case "macro":
     case "snake":
     case "upper":
-      return str.replace("_", " ").toLowerCase();
+      return str.replaceAll("_", " ").toLowerCase();
     case "train":
     case "kebab":
-      return str.replace("-", " ").toLowerCase();
+      return str.replaceAll("-", " ").toLowerCase();
     default:
       return str.toLowerCase();
   }
@@ -124,3 +160,7 @@ export function toCase(str: string, toCase: CaseType) {
       return str;
   }
 }
+
+if (import.meta.main) {
+  console.log(toCase("SSN", "camel"));
+}