Initial commit

api/src/utils/base64-to-buffer.ts

@@ -0,0 +1,24 @@
+/**
+ * Converts a base64 data URL to a Buffer
+ * @param dataUrl - Base64 data URL string (e.g., "data:image/png;base64,iVBORw0KGgo...")
+ * @returns Buffer containing the binary data, or null if input is null/undefined
+ */
+export function base64ToBuffer(dataUrl: string | null | undefined): Buffer | null {
+  if (!dataUrl) {
+    return null
+  }
+
+  // Extract the base64 data from the data URL
+  // Format: data:image/png;base64,<base64-encoded-data>
+  const base64Match = dataUrl.match(/^data:([A-Za-z-+\/]+);base64,(.+)$/)
+
+  if (!base64Match) {
+    // If it's not a data URL, assume it's already base64 encoded
+    return Buffer.from(dataUrl, "base64")
+  }
+
+  const base64Data = base64Match[2]
+  return Buffer.from(base64Data, "base64")
+}
+
+export default base64ToBuffer