refactor: README theme generation logic (#485)

Co-authored-by: Ansh_sharma <[email protected]>

Author: Viole07

scripts/generate-theme-doc.ts

@@ -11,23 +11,29 @@ function generateThemeLink(username: string, theme: string): string {
   return `[${theme}]: https://github-readme-profile-alpha.vercel.app/api?username=${username}&theme=${theme}`;
 }
 
+function createThemeRows(
+  themesArray: string[],
+  itemsPerRow: number,
+  username: string
+): { themesPreviewTable: string; themesPreviewLink: string } {
+  let themesPreviewTable = "";
+  let themesPreviewLink = "";
+
+  for (let i = 0; i < themesArray.length; i += itemsPerRow) {
+    const rowThemes = themesArray.slice(i, i + itemsPerRow);
+
+    themesPreviewTable += `| ${rowThemes.map(generateThemeMarkdown).join(" | ")} |\n`;
+    themesPreviewLink += rowThemes.map(theme => generateThemeLink(username, theme)).join("\n") + "\n";
+  }
+
+  return { themesPreviewTable, themesPreviewLink };
+}
+
 export function generateReadmeThemes(username: string): string {
   const availableThemes = Object.keys(themes);
   const itemsPerRow = 3;
 
-  let themesPreviewTable = "";
-  for (let i = 0; i < availableThemes.length; i += itemsPerRow) {
-    const themesSlice = availableThemes.slice(i, i + itemsPerRow);
-    const row = themesSlice.map(theme => generateThemeMarkdown(theme)).join(" | ");
-    themesPreviewTable += `| ${row} |\n`;
-  }
-
-  let themesPreviewLink = "";
-  for (let i = 0; i < availableThemes.length; i += 1) {
-    const themesSlice = availableThemes.slice(i, i + 1);
-    const row = themesSlice.map(theme => generateThemeLink(username, theme)).join("\n");
-    themesPreviewLink += `${row}\n`;
-  }
+  const { themesPreviewTable, themesPreviewLink } = createThemeRows(availableThemes, itemsPerRow, username);
 
   const readmeContent = `<!-- DO NOT EDIT THIS FILE DIRECTLY -->
 ## Available Themes