feat: csv-to-tsv (service)

src/pages/tools/csv/csv-to-tsv/service.ts

@@ -0,0 +1,35 @@
+function unquoteIfQuoted(value: string, quoteCharacter: string): string {
+  if (value.startsWith(quoteCharacter) && value.endsWith(quoteCharacter)) {
+    return value.slice(1, -1); // Remove first and last character
+  }
+  return value;
+}
+export function csvToTsv(
+  input: string,
+  delimiter: string,
+  quoteCharacter: string,
+  commentCharacter: string,
+  header: boolean,
+  emptyLines: boolean
+): string {
+  // edge case: if input is empty, return empty string
+  if (!input) return '';
+  const lines = input.split('\n');
+  // is header is set to false, remove the first line
+  if (!header) lines.shift();
+
+  const tsvLines = lines.map((line) => {
+    //  if comment character is set, remove the lines that start with it
+    if (commentCharacter && line.startsWith(commentCharacter)) return '';
+    const cells = line.split(delimiter);
+    cells.forEach((cell, index) => {
+      cells[index] = unquoteIfQuoted(cell, quoteCharacter);
+    });
+    return cells.join('\t');
+  });
+  // if empty lines is set to true, remove the empty lines
+
+  return !emptyLines
+    ? tsvLines.join('\n')
+    : tsvLines.filter((line) => line.trim() !== '').join('\n');
+}