use least used subnet

src/utils/IPv4gen.ts

@@ -23,16 +23,40 @@ const cidrOptions = [
  "172.25.30.0/24",
 ];
 
-// const generateCidr = () => {
-// return cidrOptions[Math.floor(Math.random() * cidrOptions.length)];
-// };
 const generateCidr = (usedCidr: string[][]) => {
  // Flatten the usedCidr array
  const flattenedUsedCidr = usedCidr.flat();
 
+ // Count the frequency of each CIDR in the usedCidr array
+ const cidrFrequency: { [key: string]: number } = {};
+ for (const cidr of flattenedUsedCidr) {
+ if (cidrFrequency[cidr]) {
+ cidrFrequency[cidr]++;
+ } else {
+ cidrFrequency[cidr] = 1;
+ }
+ }
+
  // Filter the available CIDRs
  const availableCidr = cidrOptions.filter((cidr) => !flattenedUsedCidr.includes(cidr));
- return availableCidr.length > 0 ? availableCidr[0] : cidrOptions[0];
+
+ // If there are available CIDRs, return the first one
+ if (availableCidr.length > 0) {
+ return availableCidr[0];
+ }
+
+ // If no available CIDRs, find the CIDR with the fewest occurrences
+ let leastUsedCidr = cidrOptions[0];
+ let minCount = Infinity;
+ for (const cidr of cidrOptions) {
+ const count = cidrFrequency[cidr] || 0;
+ if (count < minCount) {
+ minCount = count;
+ leastUsedCidr = cidr;
+ }
+ }
+
+ return leastUsedCidr;
 };
 export const IPv4gen = (CIDR: string | null, usedCidr) => {
  const cidr = CIDR ? CIDR : generateCidr(usedCidr);