From 2bf20fe39cd70b25f89ccd3b40d06895f25a0833 Mon Sep 17 00:00:00 2001
From: Petri Hienonen <petri.hienonen@gmail.com>
Date: Sun, 28 Sep 2025 12:09:33 +0300
Subject: Iteration

---
 static/functions.js | 184 +++++++++++++++++++++
 static/index.html   | 146 ++++++++++++++++
 static/styles.css   | 466 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 796 insertions(+)
 create mode 100644 static/functions.js
 create mode 100644 static/index.html
 create mode 100644 static/styles.css

(limited to 'static')

diff --git a/static/functions.js b/static/functions.js
new file mode 100644
index 0000000..ce909e2
--- /dev/null
+++ b/static/functions.js
@@ -0,0 +1,184 @@
+
+export function show(panel) {
+    document.getElementById('panelStatus').style.display = panel === 'status' ? 'block' : 'none';
+    document.getElementById('panelConfigs').style.display = panel === 'configs' ? 'block' : 'none';
+    document.getElementById('panelLogs').style.display = panel === 'logs' ? 'block' : 'none';
+    document.getElementById('panelCommands').style.display = panel === 'commands' ? 'block' : 'none';
+    if (panel === 'status') loadStatus();
+    if (panel === 'configs') refreshConfigs();
+    if (panel === 'logs') loadLogs();
+}
+
+export async function api(path, opts) {
+    const res = await fetch(path, opts);
+    if (!res.ok) {
+        const text = await res.text();
+        throw new Error(res.status + ' ' + text);
+    }
+    return res;
+}
+
+export async function loadStatus() {
+    try {
+        const res = await api('/api/status');
+        const data = await res.json();
+        renderIfaces(data.Interfaces || []);
+    } catch (e) {
+        document.getElementById('ifaces').innerHTML = '<div class="panel">Error loading status: ' + e.message + '</div>';
+    }
+}
+
+export function renderIfaces(ifaces) {
+    const out = [];
+    if (ifaces.length === 0) {
+        out.push('<div class="panel">No interfaces</div>');
+    }
+    for (const ifc of ifaces) {
+        const name = ifc.Name || 'n/a';
+        const typ = ifc.Type || '';
+        const state = ifc.OperationalState || ifc.AdministrativeState || '';
+        const mac = ifc.HardwareAddress ? arrayToMac(ifc.HardwareAddress) : '';
+        const addrs = (ifc.Addresses || []).map(a => ipFromArray(a)).join('<br>');
+        const routes = (ifc.Routes || []).map(r => routeToString(r)).join('<br>');
+        const dns = (ifc.DNS || []).map(d => ipFromArray(d.Address || d)).join('<br>');
+        out.push(`<div class="panel"><h4 style="margin:0">${name} <small class="small">${typ}</small></h4>
+      <div class="iface">
+        <div><strong>State</strong><div class="small">${state}</div></div>
+        <div><strong>MAC</strong><div class="small">${mac}</div></div>
+        <div><strong>Addresses</strong><div class="small">${addrs}</div></div>
+        <div><strong>DNS</strong><div class="small">${dns}</div></div>
+        <div style="grid-column:1/-1"><strong>Routes</strong><div class="small">${routes}</div></div>
+      </div></div>`);
+    }
+    document.getElementById('ifaces').innerHTML = out.join('');
+}
+
+export function arrayToMac(a) {
+    if (!Array.isArray(a)) return '';
+    return a.map(x => ('0' + x.toString(16)).slice(-2)).join(':');
+}
+
+export function ipFromArray(obj) {
+    // obj can be { Family: number, Address: [..] } or {Address: [...]}
+    let arr = null;
+    if (Array.isArray(obj)) arr = obj;
+    else if (obj && Array.isArray(obj.Address)) arr = obj.Address;
+    else return '';
+    // detect IPv4 vs IPv6
+    if (arr.length === 4) return arr.join('.');
+    if (arr.length === 16) {
+        // IPv6 - format groups of 2 bytes
+        const parts = [];
+        for (let i = 0; i < 16; i += 2) {
+            parts.push(((arr[i] << 8) | arr[i + 1]).toString(16));
+        }
+        return parts.join(':').replace(/(:0+)+/, '::');
+    }
+    return JSON.stringify(arr);
+}
+
+export function routeToString(r) {
+    if (!r) return '';
+    const dest = r.Destination ? ipFromArray(r.Destination) : '';
+    const pref = r.Gateway ? ipFromArray(r.Gateway) : '';
+    return dest + (pref ? ' → ' + pref : '');
+}
+
+/* Configs editor */
+export async function refreshConfigs() {
+    try {
+        const res = await api('/api/configs');
+        const data = await res.json();
+        const sel = document.getElementById('configSelect');
+        sel.innerHTML = '';
+        data.files.forEach(f => {
+            const opt = document.createElement('option');
+            opt.value = f; opt.textContent = f;
+            sel.appendChild(opt);
+        });
+        if (data.files.length > 0) {
+            loadConfig();
+        } else {
+            document.getElementById('cfgEditor').value = '';
+        }
+    } catch (e) {
+        alert('Failed to list configs: ' + e.message);
+    }
+}
+
+export async function loadConfig() {
+    const name = document.getElementById('configSelect').value;
+    if (!name) return;
+    try {
+        const res = await api('/api/config/' + encodeURIComponent(name));
+        const txt = await res.text();
+        document.getElementById('cfgEditor').value = txt;
+        document.getElementById('validateResult').textContent = '';
+    } catch (e) {
+        alert('Failed to load: ' + e.message);
+    }
+}
+
+export async function validateConfig() {
+    const name = document.getElementById('configSelect').value;
+    const content = document.getElementById('cfgEditor').value;
+    document.getElementById('validateResult').textContent = 'Validating...';
+    try {
+        const res = await api('/api/validate', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ name, content }) });
+        const r = await res.json();
+        if (r.ok) {
+            document.getElementById('validateResult').textContent = 'OK';
+        } else {
+            document.getElementById('validateResult').textContent = 'Error: ' + (r.output || 'validation failed');
+        }
+    } catch (e) {
+        document.getElementById('validateResult').textContent = 'Error: ' + e.message;
+    }
+}
+
+export async function saveConfig() {
+    const name = document.getElementById('configSelect').value;
+    const content = document.getElementById('cfgEditor').value;
+    const restart = document.getElementById('restartAfterSave').checked;
+    if (!confirm('Save file ' + name + '? This will create a backup and (optionally) restart networkd.')) return;
+    try {
+        const res = await api('/api/save', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ name, content, restart }) });
+        const r = await res.json();
+        alert('Saved: ' + (r.status || 'ok'));
+    } catch (e) {
+        alert('Save failed: ' + e.message);
+    }
+}
+
+/* Logs & commands */
+export async function loadLogs() {
+    try {
+        const res = await api('/api/logs');
+        const txt = await res.text();
+        document.getElementById('logsArea').textContent = txt;
+    } catch (e) {
+        document.getElementById('logsArea').textContent = 'Error: ' + e.message;
+    }
+}
+
+export async function restartNetworkd() {
+    if (!confirm('Restart systemd-networkd? Active connections may be reset.')) return;
+    try {
+        const res = await api('/api/reload', { method: 'POST' });
+        const j = await res.json();
+        document.getElementById('cmdResult').textContent = JSON.stringify(j);
+    } catch (e) {
+        document.getElementById('cmdResult').textContent = 'Error: ' + e.message;
+    }
+}
+
+export async function rebootDevice() {
+    if (!confirm('Reboot device now?')) return;
+    try {
+        const res = await api('/api/reboot', { method: 'POST' });
+        const j = await res.json();
+        document.getElementById('cmdResult').textContent = JSON.stringify(j);
+    } catch (e) {
+        document.getElementById('cmdResult').textContent = 'Error: ' + e.message;
+    }
+}
diff --git a/static/index.html b/static/index.html
new file mode 100644
index 0000000..842775a
--- /dev/null
+++ b/static/index.html
@@ -0,0 +1,146 @@
+<!-- index.html -->
+<!doctype html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8" />
+    <title>Network UI — Control Panel</title>
+    <meta name="viewport" content="width=device-width,initial-scale=1" />
+    <link rel="stylesheet" href="./static/styles.css">
+</head>
+
+<body>
+    <header>
+        <h2>Network Classroom</h2>
+        <p class="subtitle">Educational interface for learning network configuration with systemd-networkd</p>
+    </header>
+
+    <main>
+        <nav>
+            <button class="nav-button active" onclick="show('status')">
+                <span>🌐</span> Network Status
+            </button>
+            <button class="nav-button" onclick="show('configs')">
+                <span>⚙️</span> Configurations
+            </button>
+            <button class="nav-button" onclick="show('logs')">
+                <span>📋</span> System Logs
+            </button>
+            <button class="nav-button accent" onclick="show('commands')">
+                <span>🔧</span> System Commands
+            </button>
+
+            <div class="tips-section">
+                <div class="tips-title">Learning Tips</div>
+                <ul class="tips-list">
+                    <li>Always validate before saving changes</li>
+                    <li>Automatic backups are created on save</li>
+                    <li>Use the logs to troubleshoot issues</li>
+                </ul>
+            </div>
+        </nav>
+
+        <section id="panelStatus" class="active">
+            <div class="card">
+                <div class="card-header">
+                    <div>
+                        <h3 class="card-title">Network Status</h3>
+                        <p class="card-description">Live view of network interfaces and their configuration</p>
+                    </div>
+                    <button class="button" onclick="loadStatus()">
+                        <span>🔄</span> Refresh
+                    </button>
+                </div>
+                <div id="ifaces" class="interface-grid"></div>
+            </div>
+        </section>
+
+        <section id="panelConfigs">
+            <div class="card">
+                <div class="card-header">
+                    <div>
+                        <h3 class="card-title">Configuration Files</h3>
+                        <p class="card-description">Edit systemd-networkd configuration files in /etc/systemd/network/
+                        </p>
+                    </div>
+                    <div style="display: flex; gap: var(--spacing-s);">
+                        <button class="button secondary" onclick="refreshConfigs()">
+                            Refresh List
+                        </button>
+                        <button class="button" onclick="saveConfig()">
+                            <span>💾</span> Save
+                        </button>
+                    </div>
+                </div>
+            </div>
+
+            <div class="card">
+                <div class="form-group">
+                    <label class="form-label">Configuration File</label>
+                    <select id="configSelect" class="select" onchange="loadConfig()"></select>
+                </div>
+
+                <div class="form-group">
+                    <label class="form-label">File Contents</label>
+                    <textarea id="cfgEditor" class="textarea" spellcheck="false"></textarea>
+                </div>
+
+                <div class="checkbox-group">
+                    <input type="checkbox" id="restartAfterSave" class="checkbox">
+                    <label for="restartAfterSave" class="checkbox-label">
+                        Restart systemd-networkd after saving
+                    </label>
+                </div>
+
+                <div style="display: flex; gap: var(--spacing-s); align-items: center;">
+                    <button class="button secondary" onclick="validateConfig()">
+                        Validate Configuration
+                    </button>
+                    <span id="validateResult"></span>
+                </div>
+            </div>
+        </section>
+
+        <section id="panelLogs">
+            <div class="card">
+                <div class="card-header">
+                    <div>
+                        <h3 class="card-title">System Logs</h3>
+                        <p class="card-description">Recent logs from systemd-networkd service</p>
+                    </div>
+                    <button class="button" onclick="loadLogs()">
+                        <span>🔄</span> Refresh
+                    </button>
+                </div>
+                <div class="logs-container" id="logsArea">[Loading logs...]</div>
+            </div>
+        </section>
+
+        <section id="panelCommands">
+            <div class="card">
+                <h3 class="card-title">System Commands</h3>
+                <p class="card-description">Manage network services and system state</p>
+
+                <div style="display: flex; gap: var(--spacing-s); margin-top: var(--spacing-xl);">
+                    <button class="button" onclick="restartNetworkd()">
+                        <span>🔄</span> Restart Network Service
+                    </button>
+                    <button class="button warning" onclick="rebootDevice()">
+                        <span>⚠️</span> Reboot Device
+                    </button>
+                </div>
+
+                <div id="cmdResult" class="command-result"></div>
+            </div>
+        </section>
+    </main>
+
+    <script type="module">
+        import {show, api, loadStatus, renderIfaces, arrayToMac, ipFromArray, routeToString, refreshConfigs, loadConfig, validateConfig, saveConfig, loadLogs, restartNetworkd, rebootDevice} from "./static/functions.js";
+        window.onload = function () {
+            loadStatus();
+        }
+    </script>
+</body>
+
+</html>
diff --git a/static/styles.css b/static/styles.css
new file mode 100644
index 0000000..96531df
--- /dev/null
+++ b/static/styles.css
@@ -0,0 +1,466 @@
+:root {
+  /* Fluent 2 Color Tokens */
+  --color-neutral-background: #f7f7f7;
+  --color-neutral-background-selected: #e6e6e6;
+  --color-neutral-foreground: #242424;
+  --color-neutral-foreground-subtle: #616161;
+  --color-brand-background: #0078d4;
+  --color-brand-background-hover: #106ebe;
+  --color-brand-foreground: #0078d4;
+  --color-brand-foreground-hover: #004578;
+  --color-status-success: #107c10;
+  --color-status-warning: #d83b01;
+  --color-status-error: #d13438;
+  --color-status-info: #0078d4;
+
+  /* Fluent 2 Shadows */
+  --shadow-2: 0 0 2px rgba(0,0,0,0.12), 0 2px 4px rgba(0,0,0,0.14);
+  --shadow-4: 0 0 2px rgba(0,0,0,0.12), 0 4px 8px rgba(0,0,0,0.14);
+  --shadow-8: 0 0 2px rgba(0,0,0,0.12), 0 8px 16px rgba(0,0,0,0.14);
+
+  /* Fluent 2 Typography */
+  --font-weight-regular: 400;
+  --font-weight-semibold: 600;
+  --font-weight-bold: 700;
+
+  /* Spacing */
+  --spacing-xs: 4px;
+  --spacing-s: 8px;
+  --spacing-m: 12px;
+  --spacing-l: 16px;
+  --spacing-xl: 20px;
+  --spacing-xxl: 24px;
+
+  /* Border Radius */
+  --border-radius-medium: 4px;
+  --border-radius-large: 8px;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+body {
+  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
+  margin: 0;
+  background-color: var(--color-neutral-background);
+  color: var(--color-neutral-foreground);
+  line-height: 1.4;
+}
+
+/* Header */
+header {
+  background: white;
+  padding: var(--spacing-l) var(--spacing-xl);
+  border-bottom: 1px solid #e1e1e1;
+  box-shadow: var(--shadow-2);
+}
+
+header h2 {
+  margin: 0 0 var(--spacing-xs) 0;
+  font-weight: var(--font-weight-semibold);
+  font-size: 24px;
+  color: var(--color-neutral-foreground);
+}
+
+.subtitle {
+  font-size: 14px;
+  color: var(--color-neutral-foreground-subtle);
+  margin: 0;
+}
+
+/* Main Layout */
+main {
+  display: flex;
+  min-height: calc(100vh - 80px);
+}
+
+/* Navigation */
+nav {
+  width: 260px;
+  background: white;
+  border-right: 1px solid #e1e1e1;
+  padding: var(--spacing-l);
+  display: flex;
+  flex-direction: column;
+  gap: var(--spacing-xs);
+}
+
+.nav-button {
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-s);
+  padding: var(--spacing-m) var(--spacing-l);
+  background: none;
+  border: 1px solid transparent;
+  border-radius: var(--border-radius-medium);
+  font-family: inherit;
+  font-size: 14px;
+  font-weight: var(--font-weight-regular);
+  color: var(--color-neutral-foreground);
+  cursor: pointer;
+  transition: all 0.1s ease;
+  text-align: left;
+  text-decoration: none;
+}
+
+.nav-button:hover {
+  background-color: var(--color-neutral-background);
+  border-color: #e1e1e1;
+}
+
+.nav-button.active {
+  background-color: var(--color-brand-background);
+  color: white;
+  font-weight: var(--font-weight-semibold);
+}
+
+.nav-button.accent {
+  background-color: var(--color-brand-background);
+  color: white;
+  font-weight: var(--font-weight-semibold);
+  margin-top: var(--spacing-xl);
+}
+
+.nav-button.accent:hover {
+  background-color: var(--color-brand-background-hover);
+}
+
+.nav-button.warning {
+  background-color: var(--color-status-warning);
+  color: white;
+}
+
+.nav-button.warning:hover {
+  background-color: #c13501;
+}
+
+/* Content Area */
+section {
+  flex: 1;
+  padding: var(--spacing-xl);
+  overflow: auto;
+  display: none;
+}
+
+section.active {
+  display: block;
+}
+
+/* Cards/Panels */
+.card {
+  background: white;
+  border-radius: var(--border-radius-large);
+  padding: var(--spacing-xl);
+  margin-bottom: var(--spacing-l);
+  box-shadow: var(--shadow-2);
+  border: 1px solid #e1e1e1;
+}
+
+.card-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: flex-start;
+  margin-bottom: var(--spacing-l);
+}
+
+.card-title {
+  margin: 0;
+  font-weight: var(--font-weight-semibold);
+  font-size: 20px;
+  color: var(--color-neutral-foreground);
+}
+
+.card-description {
+  margin: var(--spacing-xs) 0 0 0;
+  font-size: 14px;
+  color: var(--color-neutral-foreground-subtle);
+}
+
+/* Buttons */
+.button {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--spacing-s);
+  padding: var(--spacing-m) var(--spacing-l);
+  background: var(--color-brand-background);
+  color: white;
+  border: none;
+  border-radius: var(--border-radius-medium);
+  font-family: inherit;
+  font-size: 14px;
+  font-weight: var(--font-weight-semibold);
+  cursor: pointer;
+  transition: background-color 0.1s ease;
+  text-decoration: none;
+}
+
+.button:hover {
+  background-color: var(--color-brand-background-hover);
+}
+
+.button.secondary {
+  background: transparent;
+  color: var(--color-brand-foreground);
+  border: 1px solid var(--color-brand-foreground);
+}
+
+.button.secondary:hover {
+  background-color: var(--color-neutral-background);
+}
+
+.button.warning {
+  background: var(--color-status-warning);
+}
+
+.button.warning:hover {
+  background-color: #c13501;
+}
+
+/* Interface Grid */
+.interface-grid {
+  display: grid;
+  gap: var(--spacing-l);
+  margin-top: var(--spacing-l);
+}
+
+.interface-card {
+  background: white;
+  border-radius: var(--border-radius-large);
+  padding: var(--spacing-xl);
+  box-shadow: var(--shadow-2);
+  border: 1px solid #e1e1e1;
+  border-left: 4px solid var(--color-brand-background);
+}
+
+.interface-card.wan {
+  border-left-color: var(--color-status-warning);
+}
+
+.interface-card.lan {
+  border-left-color: var(--color-status-success);
+}
+
+.interface-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: flex-start;
+  margin-bottom: var(--spacing-l);
+}
+
+.interface-name {
+  font-weight: var(--font-weight-semibold);
+  font-size: 18px;
+  margin: 0;
+}
+
+.interface-type {
+  display: inline-block;
+  padding: var(--spacing-xs) var(--spacing-s);
+  background: var(--color-neutral-background);
+  border-radius: var(--border-radius-medium);
+  font-size: 12px;
+  font-weight: var(--font-weight-semibold);
+  color: var(--color-neutral-foreground-subtle);
+  margin-left: var(--spacing-s);
+}
+
+.interface-details {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+  gap: var(--spacing-l);
+}
+
+.detail-group h4 {
+  margin: 0 0 var(--spacing-xs) 0;
+  font-size: 14px;
+  font-weight: var(--font-weight-semibold);
+  color: var(--color-neutral-foreground);
+}
+
+.detail-value {
+  font-size: 14px;
+  color: var(--color-neutral-foreground-subtle);
+  line-height: 1.5;
+}
+
+.state-badge {
+  display: inline-block;
+  padding: 2px 8px;
+  border-radius: 10px;
+  font-size: 12px;
+  font-weight: var(--font-weight-semibold);
+}
+
+.state-up {
+  background: #dff6dd;
+  color: var(--color-status-success);
+}
+
+.state-down {
+  background: #f4d5d5;
+  color: var(--color-status-error);
+}
+
+/* Forms */
+.form-group {
+  margin-bottom: var(--spacing-l);
+}
+
+.form-label {
+  display: block;
+  margin-bottom: var(--spacing-s);
+  font-weight: var(--font-weight-semibold);
+  font-size: 14px;
+  color: var(--color-neutral-foreground);
+}
+
+.select {
+  width: 100%;
+  padding: var(--spacing-m);
+  border: 1px solid #e1e1e1;
+  border-radius: var(--border-radius-medium);
+  font-family: inherit;
+  font-size: 14px;
+  background: white;
+  transition: border-color 0.1s ease;
+}
+
+.select:focus {
+  outline: none;
+  border-color: var(--color-brand-background);
+}
+
+.textarea {
+  width: 100%;
+  height: 360px;
+  padding: var(--spacing-m);
+  border: 1px solid #e1e1e1;
+  border-radius: var(--border-radius-medium);
+  font-family: 'Consolas', 'Monaco', monospace;
+  font-size: 13px;
+  line-height: 1.5;
+  resize: vertical;
+  background: white;
+  transition: border-color 0.1s ease;
+}
+
+.textarea:focus {
+  outline: none;
+  border-color: var(--color-brand-background);
+}
+
+.checkbox-group {
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-s);
+  margin: var(--spacing-l) 0;
+}
+
+.checkbox {
+  width: 16px;
+  height: 16px;
+  margin: 0;
+}
+
+.checkbox-label {
+  font-size: 14px;
+  color: var(--color-neutral-foreground);
+  margin: 0;
+}
+
+/* Validation Results */
+.validation-result {
+  padding: var(--spacing-m);
+  border-radius: var(--border-radius-medium);
+  font-size: 14px;
+  margin-top: var(--spacing-m);
+}
+
+.validation-success {
+  background: #dff6dd;
+  color: var(--color-status-success);
+  border: 1px solid #107c10;
+}
+
+.validation-error {
+  background: #f4d5d5;
+  color: var(--color-status-error);
+  border: 1px solid var(--color-status-error);
+}
+
+/* Logs */
+.logs-container {
+  background: #1e1e1e;
+  color: #d4d4d4;
+  padding: var(--spacing-l);
+  border-radius: var(--border-radius-medium);
+  font-family: 'Consolas', 'Monaco', monospace;
+  font-size: 13px;
+  line-height: 1.5;
+  overflow: auto;
+  max-height: 600px;
+  white-space: pre-wrap;
+}
+
+/* Command Results */
+.command-result {
+  padding: var(--spacing-m);
+  border-radius: var(--border-radius-medium);
+  background: var(--color-neutral-background);
+  font-size: 14px;
+  margin-top: var(--spacing-m);
+}
+
+/* Tips Section */
+.tips-section {
+  margin-top: auto;
+  padding-top: var(--spacing-xl);
+  border-top: 1px solid #e1e1e1;
+}
+
+.tips-title {
+  font-weight: var(--font-weight-semibold);
+  font-size: 14px;
+  margin-bottom: var(--spacing-s);
+  color: var(--color-neutral-foreground);
+}
+
+.tips-list {
+  margin: 0;
+  padding-left: var(--spacing-l);
+  font-size: 13px;
+  color: var(--color-neutral-foreground-subtle);
+  line-height: 1.5;
+}
+
+.tips-list li {
+  margin-bottom: var(--spacing-xs);
+}
+
+/* Responsive */
+@media (max-width: 768px) {
+  main {
+    flex-direction: column;
+  }
+
+  nav {
+    width: 100%;
+    flex-direction: row;
+    overflow-x: auto;
+    padding: var(--spacing-m);
+  }
+
+  .nav-button {
+    white-space: nowrap;
+  }
+
+  .interface-details {
+    grid-template-columns: 1fr;
+  }
+
+  .card-header {
+    flex-direction: column;
+    gap: var(--spacing-m);
+  }
+}
-- 
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