feat(new-tool): ipv4 address converter

src/tools/ipv4-address-converter/ipv4-address-converter.service.ts

@@ -0,0 +1,38 @@
+import _ from 'lodash';
+
+export { ipv4ToInt, ipv4ToIpv6, isValidIpv4 };
+
+function ipv4ToInt({ ip }: { ip: string }) {
+  if (!isValidIpv4({ ip })) {
+    return 0;
+  }
+
+  return ip
+    .trim()
+    .split('.')
+    .reduce((acc, part, index) => acc + Number(part) * Math.pow(256, 3 - index), 0);
+}
+
+function ipv4ToIpv6({ ip, prefix = '0000:0000:0000:0000:0000:ffff:' }: { ip: string; prefix?: string }) {
+  if (!isValidIpv4({ ip })) {
+    return '';
+  }
+
+  return (
+    prefix +
+    _.chain(ip)
+      .trim()
+      .split('.')
+      .map((part) => parseInt(part).toString(16).padStart(2, '0'))
+      .chunk(2)
+      .map((blocks) => blocks.join(''))
+      .join(':')
+      .value()
+  );
+}
+
+function isValidIpv4({ ip }: { ip: string }) {
+  const cleanIp = ip.trim();
+
+  return /^((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4}$/.test(cleanIp);
+}