Seperate functionality

src/textics.js

@@ -1,34 +1,94 @@
-const textics = (str) => {
+/**
+ * exclude double char from being count
+ */
+function excludeDoubleChar(str) {
+  return /\r\n/.test(str) ? str.replace(/\r\n/g, "\n") : str;
+}
+
+/**
+ * exclude newline with a start spacing
+ */
+function excludeNewline(str) {
+  return /\n /.test(str) ? str.replace(/\n /g, "\n") : str;
+}
+
+/**
+ *
+ * split each line to array
+ * @param {*} str
+ * @returns
+ */
+function splitToArray(str) {
+  return str.trim().split(/\r|\n/);
+}
+
+function count(linesArr) {
+  let words = 0;
+  let chars = 0;
+
+  const lines = linesArr.length;
+
+  let char;
+  for (let i = 0; i < lines; i += 1) {
+    const wordsArr = linesArr[i].trim().split(/\s+/);
+    for (let k = 0; k < wordsArr.length; k += 1) {
+      char = wordsArr[k].length;
+      chars += char;
+      if (char > 1) words += 1;
+    }
+  }
+
+  return {
+    lines,
+    words,
+    chars
+  };
+}
+
+/**
+ * Counts lines, words, chars and spaces for a given string.
+ *
+ * @param {string} str
+ * @returns
+ */
+function initCounting(str) {
+  const pre = excludeDoubleChar(str);
+
+  const init = excludeNewline(pre);
+
+  const linesArr = splitToArray(init);
+
+  const { lines, words, chars } = count(linesArr);
+
+  const spaces = lines === 1 ? pre.length - chars : pre.length - chars - lines;
+
+  return {
+    lines,
+    words,
+    chars,
+    spaces
+  };
+}
+
+/**
+ * Validates then calls function count.
+ */
+function textics(str) {
   let lines = 0;
   let words = 0;
   let chars = 0;
   let spaces = 0;
-  if (str.length > 0) {
-    let pre = str;
-    if (/\r\n/.test(str)) pre = str.replace(/\r\n/g, '\n'); // exclude double char from bieng count
-    let init = pre;
-    if (/\n /.test(str)) init = pre.replace(/\n /g, '\n'); // exclude newline with a start spacing
-    const linesArr = init.trim().split(/\r|\n/);
-    lines = linesArr.length;
-    let char;
-    for (let i = 0; i < lines; i += 1) {
-      const wordsArr = linesArr[i].trim().split(/\s+/);
-      for (let k = 0; k < wordsArr.length; k += 1) {
-        char = wordsArr[k].length;
-        chars += char;
-        if (char > 1) words += 1;
-      }
-    }
-    spaces = lines === 1
-      ? pre.length - chars
-      : pre.length - chars - lines;
+
+  if (str && typeof str === "string" && str.length > 0) {
+    ({ lines, words, chars, spaces } = initCounting(str));
   }
+
   return {
     lines,
     words,
     chars,
-    spaces,
+    spaces
   };
-};
+}
 
-export default textics;
+module.exports = textics;