From d584e11453281c40b8eeec9c78ecbb55c4950e4f Mon Sep 17 00:00:00 2001
From: MrUnknownDE <me@johanneskr.de>
Date: Wed, 14 Jan 2026 17:08:15 +0100
Subject: [PATCH] feat: add shareable links

---
 frontend/app/dns-lookup.js | 51 ++++++++++++++++++++++++++++++++++++++
 frontend/app/script.js     | 42 +++++++++++++++++++++++++++++++
 2 files changed, 93 insertions(+)

diff --git a/frontend/app/dns-lookup.js b/frontend/app/dns-lookup.js
index a7b363d..34c8437 100644
--- a/frontend/app/dns-lookup.js
+++ b/frontend/app/dns-lookup.js
@@ -96,6 +96,35 @@ document.addEventListener('DOMContentLoaded', () => {
         }
     }
 
+    // --- URL Parameter Functions ---
+
+    /**
+     * Updates the URL with DNS lookup parameters
+     * @param {string} domain - The domain name
+     * @param {string} type - The DNS record type
+     */
+    function updateUrlParams(domain, type) {
+        const url = new URL(window.location);
+        url.searchParams.set('domain', domain);
+        url.searchParams.set('type', type);
+        window.history.pushState({}, '', url);
+    }
+
+    /**
+     * Reads URL parameters and returns domain and type if present
+     * @returns {object|null} Object with domain and type, or null if not present
+     */
+    function getUrlParams() {
+        const urlParams = new URLSearchParams(window.location.search);
+        const domain = urlParams.get('domain');
+        const type = urlParams.get('type');
+
+        if (domain && type) {
+            return { domain, type };
+        }
+        return null;
+    }
+
     // --- DNS Lookup Specific Functions ---
     function displayDnsResults(data, outputEl) {
         if (!data.records || Object.keys(data.records).length === 0) {
@@ -114,6 +143,10 @@ document.addEventListener('DOMContentLoaded', () => {
             dnsLookupErrorEl.classList.remove('hidden');
             return;
         }
+
+        // Update URL with parameters
+        updateUrlParams(domain, type);
+
         fetchAndDisplay(
             '/dns-lookup',
             { domain, type },
@@ -126,6 +159,21 @@ document.addEventListener('DOMContentLoaded', () => {
         );
     }
 
+    /**
+     * Executes DNS lookup from URL parameters if they exist
+     */
+    function executeLookupFromUrl() {
+        const params = getUrlParams();
+        if (params) {
+            // Populate the input fields
+            dnsDomainInput.value = params.domain;
+            dnsTypeSelect.value = params.type;
+
+            // Trigger the lookup
+            handleDnsLookupClick();
+        }
+    }
+
     // --- Initial Load & Event Listeners ---
     fetchVersionInfo(); // Lade Versionsinfo für Footer
 
@@ -134,4 +182,7 @@ document.addEventListener('DOMContentLoaded', () => {
         if (event.key === 'Enter') handleDnsLookupClick();
     });
 
+    // Execute lookup from URL parameters if present
+    executeLookupFromUrl();
+
 }); // End DOMContentLoaded
\ No newline at end of file
diff --git a/frontend/app/script.js b/frontend/app/script.js
index b2202f4..3a131e1 100644
--- a/frontend/app/script.js
+++ b/frontend/app/script.js
@@ -328,6 +328,28 @@ document.addEventListener('DOMContentLoaded', () => {
 
     // --- Lookup Functions ---
 
+    // --- URL Parameter Functions ---
+
+    /**
+     * Updates the URL with IP lookup parameter
+     * @param {string} ip - The IP address or domain to lookup
+     */
+    function updateLookupUrlParams(ip) {
+        const url = new URL(window.location);
+        url.searchParams.set('ip', ip);
+        window.history.pushState({}, '', url);
+    }
+
+    /**
+     * Reads URL parameters and returns IP if present
+     * @returns {string|null} IP or domain from URL, or null if not present
+     */
+    function getLookupUrlParams() {
+        const urlParams = new URLSearchParams(window.location.search);
+        return urlParams.get('ip');
+    }
+
+
     /** Zeigt Fehler im Lookup-Bereich an */
     function showLookupError(message) {
         if (!lookupErrorEl) return;
@@ -780,6 +802,9 @@ document.addEventListener('DOMContentLoaded', () => {
         resetLookupResults(); // Reset results before starting
         hideLookupError();
 
+        // Update URL with the query parameter
+        updateLookupUrlParams(query);
+
         if (isValidIpAddress(query)) {
             // Input is an IP address
             console.log(`Lookup button clicked for IP: ${query}`);
@@ -829,6 +854,20 @@ document.addEventListener('DOMContentLoaded', () => {
         }
     }
 
+    /**
+     * Executes IP lookup from URL parameters if they exist
+     */
+    function executeLookupFromUrl() {
+        const ipParam = getLookupUrlParams();
+        if (ipParam && lookupIpInput) {
+            // Populate the input field
+            lookupIpInput.value = ipParam;
+
+            // Trigger the lookup
+            handleLookupClick();
+        }
+    }
+
     // --- Initial Load & Event Listeners ---
     fetchIpInfo(); // Lade Infos zur eigenen IP
     fetchVersionInfo(); // Lade Versionsinfo für Footer
@@ -845,4 +884,7 @@ document.addEventListener('DOMContentLoaded', () => {
     // Der Event Listener für den IP-Link wird jetzt in fetchIpInfo() hinzugefügt,
     // nachdem die IP erfolgreich abgerufen wurde.
 
+    // Execute lookup from URL parameters if present
+    executeLookupFromUrl();
+
 }); // End DOMContentLoaded
\ No newline at end of file