feat(new tool): add wifi qr code generator (#599)

* (feat: new tool): add wifi qr code generator

* Update src/tools/wifi-qr-code-generator/wifi-qr-code-generator.vue

Co-authored-by: Corentin THOMASSET <corentin.thomasset74@gmail.com>

* Update src/tools/wifi-qr-code-generator/index.ts

Co-authored-by: Corentin THOMASSET <corentin.thomasset74@gmail.com>

* remove naive UI grid

* Update src/tools/wifi-qr-code-generator/index.ts

---------

Co-authored-by: Corentin THOMASSET <corentin.thomasset74@gmail.com>

4 files changed, 314 insertions, 1 deletions

diff --git a/src/tools/index.ts b/src/tools/index.ts
index 15770b5..aa38074 100644
--- a/src/tools/index.ts
+++ b/src/tools/index.ts
@@ -56,6 +56,7 @@ import { tool as metaTagGenerator } from './meta-tag-generator';
 import { tool as mimeTypes } from './mime-types';
 import { tool as otpCodeGeneratorAndValidator } from './otp-code-generator-and-validator';
 import { tool as qrCodeGenerator } from './qr-code-generator';
+import { tool as wifiQrCodeGenerator } from './wifi-qr-code-generator';
 import { tool as randomPortGenerator } from './random-port-generator';
 import { tool as romanNumeralConverter } from './roman-numeral-converter';
 import { tool as sqlPrettify } from './sql-prettify';
@@ -117,7 +118,7 @@ export const toolsByCategory: ToolCategory[] = [
   },
   {
     name: 'Images and videos',
-    components: [qrCodeGenerator, svgPlaceholderGenerator, cameraRecorder],
+    components: [qrCodeGenerator, wifiQrCodeGenerator, svgPlaceholderGenerator, cameraRecorder],
   },
   {
     name: 'Development',
diff --git a/src/tools/wifi-qr-code-generator/index.ts b/src/tools/wifi-qr-code-generator/index.ts
new file mode 100644
index 0000000..ad0135c
--- /dev/null
+++ b/src/tools/wifi-qr-code-generator/index.ts
@@ -0,0 +1,13 @@
+import { Qrcode } from '@vicons/tabler';
+import { defineTool } from '../tool';
+
+export const tool = defineTool({
+  name: 'WiFi QR Code generator',
+  path: '/wifi-qrcode-generator',
+  description:
+    'Generate and download QR-codes for quick connections to WiFi networks.',
+  keywords: ['qr', 'code', 'generator', 'square', 'color', 'link', 'low', 'medium', 'quartile', 'high', 'transparent', 'wifi'],
+  component: () => import('./wifi-qr-code-generator.vue'),
+  icon: Qrcode,
+  createdAt: new Date('2023-09-06'),
+});
diff --git a/src/tools/wifi-qr-code-generator/useQRCode.ts b/src/tools/wifi-qr-code-generator/useQRCode.ts
new file mode 100644
index 0000000..c8a7215
--- /dev/null
+++ b/src/tools/wifi-qr-code-generator/useQRCode.ts
@@ -0,0 +1,146 @@
+import { type MaybeRef, get } from '@vueuse/core';
+import QRCode, { type QRCodeToDataURLOptions } from 'qrcode';
+import { isRef, ref, watch } from 'vue';
+
+export const wifiEncryptions = ['WEP', 'WPA', 'nopass', 'WPA2-EAP'] as const;
+export type WifiEncryption = typeof wifiEncryptions[number];
+
+// @see https://en.wikipedia.org/wiki/Extensible_Authentication_Protocol
+// for a list of available EAP methods. There are a lot (40!) of them.
+export const EAPMethods = [
+  'MD5',
+  'POTP',
+  'GTC',
+  'TLS',
+  'IKEv2',
+  'SIM',
+  'AKA',
+  'AKA\'',
+  'TTLS',
+  'PWD',
+  'LEAP',
+  'PSK',
+  'FAST',
+  'TEAP',
+  'EKE',
+  'NOOB',
+  'PEAP',
+] as const;
+export type EAPMethod = typeof EAPMethods[number];
+
+export const EAPPhase2Methods = [
+  'None',
+  'MSCHAPV2',
+] as const;
+export type EAPPhase2Method = typeof EAPPhase2Methods[number];
+
+interface IWifiQRCodeOptions {
+  ssid: MaybeRef<string>
+  password: MaybeRef<string>
+  eapMethod: MaybeRef<EAPMethod>
+  isHiddenSSID: MaybeRef<boolean>
+  eapAnonymous: MaybeRef<boolean>
+  eapIdentity: MaybeRef<string>
+  eapPhase2Method: MaybeRef<EAPPhase2Method>
+  color: { foreground: MaybeRef<string>; background: MaybeRef<string> }
+  options?: QRCodeToDataURLOptions
+}
+
+interface GetQrCodeTextOptions {
+  ssid: string
+  password: string
+  encryption: WifiEncryption
+  eapMethod: EAPMethod
+  isHiddenSSID: boolean
+  eapAnonymous: boolean
+  eapIdentity: string
+  eapPhase2Method: EAPPhase2Method
+}
+
+function escapeString(str: string) {
+  // replaces \, ;, ,, " and : with the same character preceded by a backslash
+  return str.replace(/([\\;,:"])/g, '\\$1');
+}
+
+function getQrCodeText(options: GetQrCodeTextOptions): string | null {
+  const { ssid, password, encryption, eapMethod, isHiddenSSID, eapAnonymous, eapIdentity, eapPhase2Method } = options;
+  if (!ssid) {
+    return null;
+  }
+  if (encryption === 'nopass') {
+    return `WIFI:S:${escapeString(ssid)};;`; // type can be omitted in that case, and password is not needed, makes the QR Code smaller
+  }
+  if (encryption !== 'WPA2-EAP' && password) {
+    // EAP has a lot of options, so we'll handle it separately
+    // WPA and WEP are pretty simple though.
+    return `WIFI:S:${escapeString(ssid)};T:${encryption};P:${escapeString(password)};${isHiddenSSID ? 'H:true' : ''};`;
+  }
+  if (encryption === 'WPA2-EAP' && password && eapMethod) {
+    // WPA2-EAP string is a lot more complex, first off, we drop the text if there is no identity, and it's not anonymous.
+    if (!eapIdentity && !eapAnonymous) {
+      return null;
+    }
+    // From reading, I could only find that a phase 2 is required for the PEAP method, I may be wrong though, I didn't read the whole spec.
+    if (eapMethod === 'PEAP' && !eapPhase2Method) {
+      return null;
+    }
+    // The string is built in the following order:
+    // 1. SSID
+    // 2. Authentication type
+    // 3. Password
+    // 4. EAP method
+    // 5. EAP phase 2 method
+    // 6. Identity or anonymous if checked
+    // 7. Hidden SSID if checked
+    const identity = eapAnonymous ? 'A:anon' : `I:${escapeString(eapIdentity)}`;
+    const phase2 = eapPhase2Method !== 'None' ? `PH2:${eapPhase2Method};` : '';
+    return `WIFI:S:${escapeString(ssid)};T:WPA2-EAP;P:${escapeString(password)};E:${eapMethod};${phase2}${identity};${isHiddenSSID ? 'H:true' : ''};`;
+  }
+  return null;
+}
+
+export function useWifiQRCode({
+  ssid,
+  password,
+  eapMethod,
+  isHiddenSSID,
+  eapAnonymous,
+  eapIdentity,
+  eapPhase2Method,
+  color: { background, foreground },
+  options,
+}: IWifiQRCodeOptions) {
+  const qrcode = ref('');
+  const encryption = ref<WifiEncryption>('WPA');
+
+  watch(
+    [ssid, password, encryption, eapMethod, isHiddenSSID, eapAnonymous, eapIdentity, eapPhase2Method, background, foreground].filter(isRef),
+    async () => {
+      // @see https://github.com/zxing/zxing/wiki/Barcode-Contents#wi-fi-network-config-android-ios-11
+      // This is the full spec, there's quite a bit of logic to generate the string embeddedin the QR code.
+      const text = getQrCodeText({
+        ssid: get(ssid),
+        password: get(password),
+        encryption: get(encryption),
+        eapMethod: get(eapMethod),
+        isHiddenSSID: get(isHiddenSSID),
+        eapAnonymous: get(eapAnonymous),
+        eapIdentity: get(eapIdentity),
+        eapPhase2Method: get(eapPhase2Method),
+      });
+      if (text) {
+        qrcode.value = await QRCode.toDataURL(get(text).trim(), {
+          color: {
+            dark: get(foreground),
+            light: get(background),
+            ...options?.color,
+          },
+          errorCorrectionLevel: 'M',
+          ...options,
+        });
+      }
+    },
+    { immediate: true },
+  );
+  return { qrcode, encryption };
+}
diff --git a/src/tools/wifi-qr-code-generator/wifi-qr-code-generator.vue b/src/tools/wifi-qr-code-generator/wifi-qr-code-generator.vue
new file mode 100644
index 0000000..e6320d3
--- /dev/null
+++ b/src/tools/wifi-qr-code-generator/wifi-qr-code-generator.vue
@@ -0,0 +1,153 @@
+<script setup lang="ts">
+import {
+  EAPMethods,
+  EAPPhase2Methods,
+  useWifiQRCode,
+} from './useQRCode';
+import { useDownloadFileFromBase64 } from '@/composable/downloadBase64';
+
+const foreground = ref('#000000ff');
+const background = ref('#ffffffff');
+
+const ssid = ref();
+const password = ref();
+const eapMethod = ref();
+const isHiddenSSID = ref(false);
+const eapAnonymous = ref(false);
+const eapIdentity = ref();
+const eapPhase2Method = ref();
+
+const { qrcode, encryption } = useWifiQRCode({
+  ssid,
+  password,
+  eapMethod,
+  isHiddenSSID,
+  eapAnonymous,
+  eapIdentity,
+  eapPhase2Method,
+  color: {
+    background,
+    foreground,
+  },
+  options: { width: 1024 },
+});
+
+const { download } = useDownloadFileFromBase64({ source: qrcode, filename: 'qr-code.png' });
+</script>
+
+<template>
+  <c-card>
+    <div grid grid-cols-1 gap-12>
+      <div>
+        <c-select
+          v-model:value="encryption"
+          mb-4
+          label="Encryption method"
+          default-value="WPA"
+          label-position="left"
+          label-width="130px"
+          label-align="right"
+          :options="[
+            {
+              label: 'No password',
+              value: 'nopass',
+            },
+            {
+              label: 'WPA/WPA2',
+              value: 'WPA',
+            },
+            {
+              label: 'WEP',
+              value: 'WEP',
+            },
+            {
+              label: 'WPA2-EAP',
+              value: 'WPA2-EAP',
+            },
+          ]"
+        />
+        <div class="mb-6 flex flex-row items-center gap-2">
+          <c-input-text
+            v-model:value="ssid"
+            label-position="left"
+            label-width="130px"
+            label-align="right"
+            label="SSID:"
+            rows="1"
+            autosize
+            placeholder="Your WiFi SSID..."
+            mb-6
+          />
+          <n-checkbox v-model:checked="isHiddenSSID">
+            Hidden SSID
+          </n-checkbox>
+        </div>
+        <c-input-text
+          v-if="encryption !== 'nopass'"
+          v-model:value="password"
+          label-position="left"
+          label-width="130px"
+          label-align="right"
+          label="Password:"
+          rows="1"
+          autosize
+          type="password"
+          placeholder="Your WiFi Password..."
+          mb-6
+        />
+        <c-select
+          v-if="encryption === 'WPA2-EAP'"
+          v-model:value="eapMethod"
+          label="EAP method"
+          label-position="left"
+          label-width="130px"
+          label-align="right"
+          :options="EAPMethods.map((method) => ({ label: method, value: method }))"
+          searchable mb-4
+        />
+        <div v-if="encryption === 'WPA2-EAP'" class="mb-6 flex flex-row items-center gap-2">
+          <c-input-text
+            v-model:value="eapIdentity"
+            label-position="left"
+            label-width="130px"
+            label-align="right"
+            label="Identity:"
+            rows="1"
+            autosize
+            placeholder="Your EAP Identity..."
+            mb-6
+          />
+          <n-checkbox v-model:checked="eapAnonymous">
+            Anonymous?
+          </n-checkbox>
+        </div>
+        <c-select
+          v-if="encryption === 'WPA2-EAP'"
+          v-model:value="eapPhase2Method"
+          label="EAP Phase 2 method"
+          label-position="left"
+          label-width="130px"
+          label-align="right"
+          :options="EAPPhase2Methods.map((method) => ({ label: method, value: method }))"
+          searchable mb-4
+        />
+        <n-form label-width="130" label-placement="left">
+          <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>
+      </div>
+      <div v-if="qrcode">
+        <div flex flex-col items-center gap-3>
+          <img alt="wifi-qrcode" :src="qrcode" width="200">
+          <c-button @click="download">
+            Download qr-code
+          </c-button>
+        </div>
+      </div>
+    </div>
+  </c-card>
+</template>