feat(tool): qr-code generator

src/tools/qr-code-generator/index.ts

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+import { Qrcode } from '@vicons/tabler';
+import type { ITool } from './../Tool';
+
+export const tool: ITool = {
+  name: 'QR Code generator',
+  path: '/qr-code-generator',
+  description: 'Generate and download QR-code for an url or just a text and customize the background and foreground colors.',
+  keywords: ['qr', 'code', 'generator', 'square', 'color', 'link', 'low', 'medium', 'quartile', 'high', 'transparent'],
+  component: () => import('./qr-code-generator.vue'),
+  icon: Qrcode,
+};

src/tools/qr-code-generator/qr-code-generator.vue

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+<template>
+  <n-card>
+    <n-grid cols="3" x-gap="12">
+      <n-gi span="2">
+        <n-form label-width="130" label-placement="left">
+          <n-form-item label="Text:">
+            <n-input v-model:value="text" placeholder="Your link or text..." />
+          </n-form-item>
+          <n-form-item label="Foreground color:">
+            <n-color-picker v-model:value="foreground" :modes="['hex']" />
+          </n-form-item>
+          <n-form-item label="Background color:">
+            <n-color-picker v-model:value="background" :modes="['hex']" />
+          </n-form-item>
+          <n-form-item label="Error resistance:">
+            <n-select v-model:value="errorCorrectionLevel"
+              :options="errorCorrectionLevels.map((value) => ({ label: value, value }))" />
+          </n-form-item>
+        </n-form>
+      </n-gi>
+      <n-gi>
+        <n-space justify="center" align="center" vertical>
+          <n-image :src="qrcode" width="200" />
+          <n-button @click="download" secondary>Download qr-code</n-button>
+        </n-space>
+      </n-gi>
+    </n-grid>
+  </n-card>
+</template>
+
+<script setup lang="ts">
+import { useDownloadFileFromBase64 } from '@/composable/downloadBase64';
+import { useQRCode } from './useQRCode'
+import { ref } from 'vue';
+import type { QRCodeErrorCorrectionLevel } from 'qrcode';
+
+
+const foreground = ref('#000000ff')
+const background = ref('#ffffffff')
+const errorCorrectionLevel = ref<QRCodeErrorCorrectionLevel>('medium')
+
+const errorCorrectionLevels = ['low', 'medium', 'quartile', 'high']
+
+const text = ref('https://it-tools.tech')
+const { qrcode } = useQRCode({
+  text,
+  color: {
+    background,
+    foreground
+  },
+  errorCorrectionLevel,
+  options: { width: 1024 }
+})
+
+const { download } = useDownloadFileFromBase64({ source: qrcode, filename: 'qr-code.png' })
+
+</script>
+
+<style lang="less" scoped>
+</style>

src/tools/qr-code-generator/useQRCode.ts

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+import QRCode, { type QRCodeErrorCorrectionLevel, type QRCodeToDataURLOptions } from 'qrcode';
+import { ref, watch, type Ref } from 'vue';
+
+export function useQRCode({
+  text,
+  color: { background, foreground },
+  errorCorrectionLevel,
+  options,
+}: {
+  text: Ref<string>;
+  color: { foreground: Ref<string>; background: Ref<string> };
+  errorCorrectionLevel: Ref<QRCodeErrorCorrectionLevel>;
+  options?: QRCodeToDataURLOptions;
+}) {
+  const qrcode = ref('');
+
+  watch(
+    [text, background, foreground, errorCorrectionLevel],
+    async () => {
+      if (text.value)
+        qrcode.value = await QRCode.toDataURL(text.value, {
+          color: {
+            dark: foreground.value,
+            light: background.value,
+            ...options?.color,
+          },
+          errorCorrectionLevel: errorCorrectionLevel.value,
+          ...options,
+        });
+    },
+    { immediate: true }
+  );
+
+  return { qrcode };
+}