7 files changed, 204 insertions, 2 deletions
diff --git a/src/tools/index.ts b/src/tools/index.ts
index e6df8cc..22db077 100644
--- a/src/tools/index.ts
+++ b/src/tools/index.ts
@@ -1,6 +1,7 @@
 import { tool as base64FileConverter } from './base64-file-converter';
 import { tool as base64StringConverter } from './base64-string-converter';
 import { tool as basicAuthGenerator } from './basic-auth-generator';
+import { tool as macAddressGenerator } from './mac-address-generator';
 import { tool as textToBinary } from './text-to-binary';
 import { tool as ulidGenerator } from './ulid-generator';
 import { tool as ibanValidatorAndParser } from './iban-validator-and-parser';
@@ -140,7 +141,7 @@ export const toolsByCategory: ToolCategory[] = [
   },
   {
     name: 'Network',
-    components: [ipv4SubnetCalculator, ipv4AddressConverter, ipv4RangeExpander, macAddressLookup, ipv6UlaGenerator],
+    components: [ipv4SubnetCalculator, ipv4AddressConverter, ipv4RangeExpander, macAddressLookup, macAddressGenerator, ipv6UlaGenerator],
   },
   {
     name: 'Math',
diff --git a/src/tools/mac-address-generator/index.ts b/src/tools/mac-address-generator/index.ts
new file mode 100644
index 0000000..9d20fb6
--- /dev/null
+++ b/src/tools/mac-address-generator/index.ts
@@ -0,0 +1,12 @@
+import { Devices } from '@vicons/tabler';
+import { defineTool } from '../tool';
+
+export const tool = defineTool({
+  name: 'MAC address generator',
+  path: '/mac-address-generator',
+  description: 'Enter the quantity and prefix. MAC addresses will be generated in your chosen case (uppercase or lowercase)',
+  keywords: ['mac', 'address', 'generator', 'random', 'prefix'],
+  component: () => import('./mac-address-generator.vue'),
+  icon: Devices,
+  createdAt: new Date('2023-11-31'),
+});
diff --git a/src/tools/mac-address-generator/mac-address-generator.e2e.spec.ts b/src/tools/mac-address-generator/mac-address-generator.e2e.spec.ts
new file mode 100644
index 0000000..1d99ccd
--- /dev/null
+++ b/src/tools/mac-address-generator/mac-address-generator.e2e.spec.ts
@@ -0,0 +1,11 @@
+import { expect, test } from '@playwright/test';
+
+test.describe('Tool - MAC address generator', () => {
+  test.beforeEach(async ({ page }) => {
+    await page.goto('/mac-address-generator');
+  });
+
+  test('Has correct title', async ({ page }) => {
+    await expect(page).toHaveTitle('MAC address generator - IT Tools');
+  });
+});
diff --git a/src/tools/mac-address-generator/mac-address-generator.vue b/src/tools/mac-address-generator/mac-address-generator.vue
new file mode 100644
index 0000000..725070d
--- /dev/null
+++ b/src/tools/mac-address-generator/mac-address-generator.vue
@@ -0,0 +1,103 @@
+<script setup lang="ts">
+import _ from 'lodash';
+import { generateRandomMacAddress } from './mac-adress-generator.models';
+import { computedRefreshable } from '@/composable/computedRefreshable';
+import { useCopy } from '@/composable/copy';
+import { usePartialMacAddressValidation } from '@/utils/macAddress';
+
+const amount = useStorage('mac-address-generator-amount', 1);
+const macAddressPrefix = useStorage('mac-address-generator-prefix', '64:16:7F');
+
+const prefixValidation = usePartialMacAddressValidation(macAddressPrefix);
+
+const casesTransformers = [
+  { label: 'Uppercase', value: (value: string) => value.toUpperCase() },
+  { label: 'Lowercase', value: (value: string) => value.toLowerCase() },
+];
+const caseTransformer = ref(casesTransformers[0].value);
+
+const separators = [
+  {
+    label: ':',
+    value: ':',
+  },
+  {
+    label: '-',
+    value: '-',
+  },
+  {
+    label: '.',
+    value: '.',
+  },
+  {
+    label: 'None',
+    value: '',
+  },
+];
+const separator = useStorage('mac-address-generator-separator', separators[0].value);
+
+const [macAddresses, refreshMacAddresses] = computedRefreshable(() => {
+  if (!prefixValidation.isValid) {
+    return '';
+  }
+
+  const ids = _.times(amount.value, () => caseTransformer.value(generateRandomMacAddress({
+    prefix: macAddressPrefix.value,
+    separator: separator.value,
+  })));
+  return ids.join('\n');
+});
+
+const { copy } = useCopy({ source: macAddresses, text: 'MAC addresses copied to the clipboard' });
+</script>
+
+<template>
+  <div flex flex-col justify-center gap-2>
+    <div flex items-center>
+      <label w-150px pr-12px text-right> Quantity:</label>
+      <n-input-number v-model:value="amount" min="1" max="100" flex-1 />
+    </div>
+
+    <c-input-text
+      v-model:value="macAddressPrefix"
+      label="MAC address prefix:"
+      placeholder="Set a prefix, e.g. 64:16:7F"
+      clearable
+      label-position="left"
+      spellcheck="false"
+      :validation="prefixValidation"
+      raw-text
+      label-width="150px"
+      label-align="right"
+    />
+
+    <c-buttons-select
+      v-model:value="caseTransformer"
+      :options="casesTransformers"
+      label="Case:"
+      label-width="150px"
+      label-align="right"
+    />
+
+    <c-buttons-select
+      v-model:value="separator"
+      :options="separators"
+      label="Separator:"
+      label-width="150px"
+      label-align="right"
+    />
+
+    <c-card mt-5 flex data-test-id="ulids">
+      <pre m-0 m-x-auto>{{ macAddresses }}</pre>
+    </c-card>
+
+    <div flex justify-center gap-2>
+      <c-button data-test-id="refresh" @click="refreshMacAddresses()">
+        Refresh
+      </c-button>
+      <c-button @click="copy()">
+        Copy
+      </c-button>
+    </div>
+  </div>
+</template>
diff --git a/src/tools/mac-address-generator/mac-adress-generator.models.test.ts b/src/tools/mac-address-generator/mac-adress-generator.models.test.ts
new file mode 100644
index 0000000..5b66025
--- /dev/null
+++ b/src/tools/mac-address-generator/mac-adress-generator.models.test.ts
@@ -0,0 +1,43 @@
+import { describe, expect, it } from 'vitest';
+import { generateRandomMacAddress, splitPrefix } from './mac-adress-generator.models';
+
+describe('mac-adress-generator models', () => {
+  describe('splitPrefix', () => {
+    it('a mac address prefix is splitted around non hex characters', () => {
+      expect(splitPrefix('')).toEqual([]);
+      expect(splitPrefix('01')).toEqual(['01']);
+      expect(splitPrefix('01:')).toEqual(['01']);
+      expect(splitPrefix('01:23')).toEqual(['01', '23']);
+      expect(splitPrefix('01-23')).toEqual(['01', '23']);
+    });
+
+    it('when a prefix contains only hex characters, they are grouped by 2', () => {
+      expect(splitPrefix('0123')).toEqual(['01', '23']);
+      expect(splitPrefix('012345')).toEqual(['01', '23', '45']);
+      expect(splitPrefix('0123456')).toEqual(['01', '23', '45', '06']);
+    });
+  });
+
+  describe('generateRandomMacAddress', () => {
+    const createRandomByteGenerator = () => {
+      let i = 0;
+      return () => (i++).toString(16).padStart(2, '0');
+    };
+
+    it('generates a random mac address', () => {
+      expect(generateRandomMacAddress({ getRandomByte: createRandomByteGenerator() })).toBe('00:01:02:03:04:05');
+    });
+
+    it('generates a random mac address with a prefix', () => {
+      expect(generateRandomMacAddress({ prefix: 'ff:ee:aa', getRandomByte: createRandomByteGenerator() })).toBe('ff:ee:aa:00:01:02');
+      expect(generateRandomMacAddress({ prefix: 'ff:ee:a', getRandomByte: createRandomByteGenerator() })).toBe('ff:ee:0a:00:01:02');
+    });
+
+    it('generates a random mac address with a prefix and a different separator', () => {
+      expect(generateRandomMacAddress({ prefix: 'ff-ee-aa', separator: '-', getRandomByte: createRandomByteGenerator() })).toBe('ff-ee-aa-00-01-02');
+      expect(generateRandomMacAddress({ prefix: 'ff:ee:aa', separator: '-', getRandomByte: createRandomByteGenerator() })).toBe('ff-ee-aa-00-01-02');
+      expect(generateRandomMacAddress({ prefix: 'ff-ee:aa', separator: '-', getRandomByte: createRandomByteGenerator() })).toBe('ff-ee-aa-00-01-02');
+      expect(generateRandomMacAddress({ prefix: 'ff ee:aa', separator: '-', getRandomByte: createRandomByteGenerator() })).toBe('ff-ee-aa-00-01-02');
+    });
+  });
+});
diff --git a/src/tools/mac-address-generator/mac-adress-generator.models.ts b/src/tools/mac-address-generator/mac-adress-generator.models.ts
new file mode 100644
index 0000000..45e434e
--- /dev/null
+++ b/src/tools/mac-address-generator/mac-adress-generator.models.ts
@@ -0,0 +1,18 @@
+import _ from 'lodash';
+
+export { splitPrefix, generateRandomMacAddress };
+
+function splitPrefix(prefix: string): string[] {
+  const base = prefix.match(/[^0-9a-f]/i) === null ? prefix.match(/.{1,2}/g) ?? [] : prefix.split(/[^0-9a-f]/i);
+
+  return base.filter(Boolean).map(byte => byte.padStart(2, '0'));
+}
+
+function generateRandomMacAddress({ prefix: rawPrefix = '', separator = ':', getRandomByte = () => _.random(0, 255).toString(16).padStart(2, '0') }: { prefix?: string; separator?: string; getRandomByte?: () => string } = {}) {
+  const prefix = splitPrefix(rawPrefix);
+
+  const randomBytes = _.times(6 - prefix.length, getRandomByte);
+  const bytes = [...prefix, ...randomBytes];
+
+  return bytes.join(separator);
+}
diff --git a/src/utils/macAddress.ts b/src/utils/macAddress.ts
index 4488b32..f55c334 100644
--- a/src/utils/macAddress.ts
+++ b/src/utils/macAddress.ts
@@ -15,4 +15,18 @@ function macAddressValidation(value: Ref) {
   });
 }
 
-export { macAddressValidation, macAddressValidationRules };
+const partialMacAddressValidationRules = [
+  {
+    message: 'Invalid partial MAC address',
+    validator: (value: string) => value.trim().match(/^([0-9a-f]{2}[:\-. ]){0,5}([0-9a-f]{0,2})$/i),
+  },
+];
+
+function usePartialMacAddressValidation(value: Ref) {
+  return useValidation({
+    source: value,
+    rules: partialMacAddressValidationRules,
+  });
+}
+
+export { macAddressValidation, macAddressValidationRules, usePartialMacAddressValidation, partialMacAddressValidationRules };