feat(ipv4-range-expander): expands a given IPv4 start and end address to a valid IPv4 subnet (#366)

* feat(ipv4-range-expander): expands a given IPv4 start and end address to a valid IPv4 subnet

* feat(ipv4-range-expander): remove old component copyable-ip-like.vue

* feat(ipv4-range-expander): fix sonar findings

* feat(ipv4-range-expander): changes due to review

* feat(ipv4-range-expander): only show n-alert if both ipv4 addresses are valid

src/tools/ipv4-range-expander/index.ts

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+import { UnfoldMoreOutlined } from '@vicons/material';
+import { defineTool } from '../tool';
+
+export const tool = defineTool({
+  name: 'IPv4 range expander',
+  path: '/ipv4-range-expander',
+  description:
+    'Given a start and an end IPv4 address this tool calculates a valid IPv4 network with its CIDR notation.',
+  keywords: ['ipv4', 'range', 'expander', 'subnet', 'creator', 'cidr'],
+  component: () => import('./ipv4-range-expander.vue'),
+  icon: UnfoldMoreOutlined,
+  createdAt: new Date('2023-04-19'),
+});

src/tools/ipv4-range-expander/ipv4-range-expander.e2e.spec.ts

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+import { test, expect } from '@playwright/test';
+
+test.describe('Tool - IPv4 range expander', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.goto('/ipv4-range-expander');
+  });
+
+  test('Has correct title', async ({ page }) => {
+    await expect(page).toHaveTitle('IPv4 range expander - IT Tools');
+  });
+
+  test('Calculates correct for valid input', async ({ page }) => {
+    await page.getByPlaceholder('Start IPv4 address...').fill('192.168.1.1');
+    await page.getByPlaceholder('End IPv4 address...').fill('192.168.7.255');
+
+    expect(await page.getByTestId('start-address.old').textContent()).toEqual('192.168.1.1');
+    expect(await page.getByTestId('start-address.new').textContent()).toEqual('192.168.0.0');
+    expect(await page.getByTestId('end-address.old').textContent()).toEqual('192.168.7.255');
+    expect(await page.getByTestId('end-address.new').textContent()).toEqual('192.168.7.255');
+    expect(await page.getByTestId('addresses-in-range.old').textContent()).toEqual('1,791');
+    expect(await page.getByTestId('addresses-in-range.new').textContent()).toEqual('2,048');
+    expect(await page.getByTestId('cidr.old').textContent()).toEqual('');
+    expect(await page.getByTestId('cidr.new').textContent()).toEqual('192.168.0.0/21');
+  });
+
+  test('Hides result for invalid input', async ({ page }) => {
+    await page.getByPlaceholder('Start IPv4 address...').fill('192.168.1.1');
+    await page.getByPlaceholder('End IPv4 address...').fill('192.168.0.255');
+
+    await expect(page.getByTestId('result')).not.toBeVisible();
+  });
+});

src/tools/ipv4-range-expander/ipv4-range-expander.service.test.ts

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+import { expect, describe, it } from 'vitest';
+import { calculateCidr } from './ipv4-range-expander.service';
+
+describe('ipv4RangeExpander', () => {
+  describe('when there are two valid ipv4 addresses given', () => {
+    it('should calculate valid cidr for given addresses', () => {
+      const result = calculateCidr({ startIp: '192.168.1.1', endIp: '192.168.7.255' });
+
+      expect(result).toBeDefined();
+      expect(result?.oldSize).toEqual(1791);
+      expect(result?.newSize).toEqual(2048);
+      expect(result?.newStart).toEqual('192.168.0.0');
+      expect(result?.newEnd).toEqual('192.168.7.255');
+      expect(result?.newCidr).toEqual('192.168.0.0/21');
+    });
+
+    it('should return empty result for invalid input', () => {
+      expect(calculateCidr({ startIp: '192.168.7.1', endIp: '192.168.6.255' })).not.toBeDefined();
+    });
+  });
+});

src/tools/ipv4-range-expander/ipv4-range-expander.service.ts

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+import type { Ipv4RangeExpanderResult } from './ipv4-range-expander.types';
+import { convertBase } from '../integer-base-converter/integer-base-converter.model';
+import { ipv4ToInt } from '../ipv4-address-converter/ipv4-address-converter.service';
+export { calculateCidr };
+
+function bits2ip(ipInt: number) {
+  return (ipInt >>> 24) + '.' + ((ipInt >> 16) & 255) + '.' + ((ipInt >> 8) & 255) + '.' + (ipInt & 255);
+}
+
+function getRangesize(start: string, end: string) {
+  if (start == null || end == null) return -1;
+
+  return 1 + parseInt(end, 2) - parseInt(start, 2);
+}
+
+function getCidr(start: string, end: string) {
+  if (start == null || end == null) return null;
+
+  const range = getRangesize(start, end);
+  if (range < 1) {
+    return null;
+  }
+
+  let mask = 32;
+  for (let i = 0; i < 32; i++) {
+    if (start[i] !== end[i]) {
+      mask = i;
+      break;
+    }
+  }
+
+  const newStart = start.substring(0, mask) + '0'.repeat(32 - mask);
+  const newEnd = end.substring(0, mask) + '1'.repeat(32 - mask);
+
+  return { start: newStart, end: newEnd, mask: mask };
+}
+
+function calculateCidr({ startIp, endIp }: { startIp: string; endIp: string }) {
+  const start = convertBase({
+    value: ipv4ToInt({ ip: startIp }).toString(),
+    fromBase: 10,
+    toBase: 2,
+  });
+  const end = convertBase({
+    value: ipv4ToInt({ ip: endIp }).toString(),
+    fromBase: 10,
+    toBase: 2,
+  });
+
+  const cidr = getCidr(start, end);
+  if (cidr != null) {
+    const result: Ipv4RangeExpanderResult = {};
+    result.newEnd = bits2ip(parseInt(cidr.end, 2));
+    result.newStart = bits2ip(parseInt(cidr.start, 2));
+    result.newCidr = result.newStart + '/' + cidr.mask;
+    result.newSize = getRangesize(cidr.start, cidr.end);
+
+    result.oldSize = getRangesize(start, end);
+    return result;
+  }
+
+  return undefined;
+}

src/tools/ipv4-range-expander/ipv4-range-expander.types.ts

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+export type Ipv4RangeExpanderResult = {
+  oldSize?: number;
+  newStart?: string;
+  newEnd?: string;
+  newCidr?: string;
+  newSize?: number;
+};

src/tools/ipv4-range-expander/ipv4-range-expander.vue

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+<template>
+  <div>
+    <n-space item-style="flex:1 1 0">
+      <div>
+        <n-space item-style="flex:1 1 0">
+          <n-form-item label="Start address" v-bind="startIpValidation.attrs">
+            <n-input v-model:value="rawStartAddress" placeholder="Start IPv4 address..." />
+          </n-form-item>
+          <n-form-item label="End address" v-bind="endIpValidation.attrs">
+            <n-input v-model:value="rawEndAddress" placeholder="End IPv4 address..." />
+          </n-form-item>
+        </n-space>
+
+        <n-table v-if="showResult" data-test-id="result">
+          <thead>
+            <tr>
+              <th scope="col">&nbsp;</th>
+              <th scope="col">old value</th>
+              <th scope="col">new value</th>
+            </tr>
+          </thead>
+          <tbody>
+            <result-row
+              v-for="{ label, getOldValue, getNewValue } in calculatedValues"
+              :key="label"
+              :label="label"
+              :old-value="getOldValue(result)"
+              :new-value="getNewValue(result)"
+            />
+          </tbody>
+        </n-table>
+        <n-alert
+          v-else-if="startIpValidation.isValid && endIpValidation.isValid"
+          title="Invalid combination of start and end IPv4 address"
+          type="error"
+        >
+          <n-space vertical>
+            <n-text depth="3">
+              The end IPv4 address is lower than the start IPv4 address. This is not valid and no result could be
+              calculated. In the most cases the solution to solve this problem is to change start and end address.
+            </n-text>
+            <n-button quaternary @click="onSwitchStartEndClicked">
+              <n-icon :component="ChangeCircleOutlined" />
+              &nbsp;&nbsp;Switch start and end IPv4 address
+            </n-button>
+          </n-space>
+        </n-alert>
+      </div>
+    </n-space>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { useValidation } from '@/composable/validation';
+import { ChangeCircleOutlined } from '@vicons/material';
+import { isValidIpv4 } from '../ipv4-address-converter/ipv4-address-converter.service';
+import type { Ipv4RangeExpanderResult } from './ipv4-range-expander.types';
+import { calculateCidr } from './ipv4-range-expander.service';
+import ResultRow from './result-row.vue';
+
+const rawStartAddress = useStorage('ipv4-range-expander:startAddress', '192.168.1.1');
+const rawEndAddress = useStorage('ipv4-range-expander:endAddress', '192.168.6.255');
+
+const result = computed(() => calculateCidr({ startIp: rawStartAddress.value, endIp: rawEndAddress.value }));
+
+const calculatedValues: {
+  label: string;
+  getOldValue: (result: Ipv4RangeExpanderResult | undefined) => string | undefined;
+  getNewValue: (result: Ipv4RangeExpanderResult | undefined) => string | undefined;
+}[] = [
+  {
+    label: 'Start address',
+    getOldValue: () => rawStartAddress.value,
+    getNewValue: (result) => result?.newStart,
+  },
+  {
+    label: 'End address',
+    getOldValue: () => rawEndAddress.value,
+    getNewValue: (result) => result?.newEnd,
+  },
+  {
+    label: 'Addresses in range',
+    getOldValue: (result) => result?.oldSize?.toLocaleString(),
+    getNewValue: (result) => result?.newSize?.toLocaleString(),
+  },
+  {
+    label: 'CIDR',
+    getOldValue: () => '',
+    getNewValue: (result) => result?.newCidr,
+  },
+];
+
+const showResult = computed(() => endIpValidation.isValid && startIpValidation.isValid && result.value !== undefined);
+const startIpValidation = useValidation({
+  source: rawStartAddress,
+  rules: [{ message: 'Invalid ipv4 address', validator: (ip) => isValidIpv4({ ip }) }],
+});
+const endIpValidation = useValidation({
+  source: rawEndAddress,
+  rules: [{ message: 'Invalid ipv4 address', validator: (ip) => isValidIpv4({ ip }) }],
+});
+
+function onSwitchStartEndClicked() {
+  const tmpStart = rawStartAddress.value;
+  rawStartAddress.value = rawEndAddress.value;
+  rawEndAddress.value = tmpStart;
+}
+</script>
+
+<style lang="less" scoped></style>

src/tools/ipv4-range-expander/result-row.vue

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+<template>
+  <tr>
+    <td>
+      <n-text strong>{{ label }}</n-text>
+    </td>
+    <td :data-test-id="testId + '.old'"><span-copyable :value="oldValue" class="monospace" /></td>
+    <td :data-test-id="testId + '.new'">
+      <span-copyable :value="newValue"></span-copyable>
+    </td>
+  </tr>
+</template>
+
+<script setup lang="ts">
+import SpanCopyable from '@/components/SpanCopyable.vue';
+import _ from 'lodash';
+
+const props = withDefaults(defineProps<{ label: string; oldValue?: string; newValue?: string }>(), {
+  label: '',
+  oldValue: '',
+  newValue: '',
+});
+const { label, oldValue, newValue } = toRefs(props);
+
+const testId = computed(() => _.kebabCase(label.value));
+</script>
+
+<style scoped lang="less"></style>