From 69f0bd079fd824dc9e929ccbbaa6bcaab0c38a7c Mon Sep 17 00:00:00 2001
From: Corentin Thomasset <corentin.thomasset74@gmail.com>
Date: Sun, 18 Jun 2023 17:57:18 +0200
Subject: feat(new-tool): json to csv converter

---
 src/tools/json-to-csv/json-to-csv.service.ts | 35 ++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 src/tools/json-to-csv/json-to-csv.service.ts

(limited to 'src/tools/json-to-csv/json-to-csv.service.ts')

diff --git a/src/tools/json-to-csv/json-to-csv.service.ts b/src/tools/json-to-csv/json-to-csv.service.ts
new file mode 100644
index 0000000..ab3c04e
--- /dev/null
+++ b/src/tools/json-to-csv/json-to-csv.service.ts
@@ -0,0 +1,35 @@
+export { getHeaders, convertArrayToCsv };
+
+function getHeaders({ array }: { array: Record<string, unknown>[] }): string[] {
+  const headers = new Set<string>();
+
+  array.forEach(item => Object.keys(item).forEach(key => headers.add(key)));
+
+  return Array.from(headers);
+}
+
+function serializeValue(value: unknown): string {
+  if (value === null) {
+    return 'null';
+  }
+
+  if (value === undefined) {
+    return '';
+  }
+
+  const valueAsString = String(value).replace(/\n/g, '\\n').replace(/\r/g, '\\r').replace(/"/g, '\\"');
+
+  if (valueAsString.includes(',')) {
+    return `"${valueAsString}"`;
+  }
+
+  return valueAsString;
+}
+
+function convertArrayToCsv({ array }: { array: Record<string, unknown>[] }): string {
+  const headers = getHeaders({ array });
+
+  const rows = array.map(item => headers.map(header => serializeValue(item[header])));
+
+  return [headers.join(','), ...rows].join('\n');
+}
-- 
cgit v1.2.3