Added AddressSuggestion component to handle address suggestions and autofill in user registration. Reworked form to make everything use input component

src/app/components/AddressSuggestions.tsx

@@ -0,0 +1,137 @@
+import React, { useState, useRef, ChangeEvent, useEffect } from 'react';
+
+interface AddressSuggestionsProps {
+  address: string;
+  setAddress: (address: string) => void;
+  postcode: string;
+  setPostcode: (postcode: string) => void;
+  setCity: (city: string) => void;
+}
+
+const fetchAddressSuggestions = async (query: string): Promise<any[]> => {
+  try {
+    const response = await fetch(
+      `https://api.dataforsyningen.dk/adgangsadresser/autocomplete?q=${encodeURIComponent(query)}&fuzzy=true`
+    );
+    const data = await response.json();
+    return data;
+  } catch (error) {
+    console.error('Error fetching address suggestions:', error);
+    return [];
+  }
+};
+
+const fetchCity = async (postcode: string): Promise<string | null> => {
+  try {
+    const response = await fetch(`https://api.dataforsyningen.dk/postnumre?nr=${postcode}`);
+    const data = await response.json();
+    if (data.length > 0) {
+      return data[0].navn; // Return the city name
+    }
+    return null;
+  } catch (error) {
+    console.error('Error fetching city:', error);
+    return null;
+  }
+};
+
+const AddressSuggestions: React.FC<AddressSuggestionsProps> = ({ address, setAddress, postcode, setPostcode, setCity }) => {
+  const [addressSuggestions, setAddressSuggestions] = useState<any[]>([]);
+  const [showSuggestions, setShowSuggestions] = useState(false);
+  const suggestionListRef = useRef<HTMLUListElement | null>(null);
+
+  const handleAddressChange = async (e: ChangeEvent<HTMLInputElement>) => {
+    const newValue = e.target.value;
+    setAddress(newValue);
+
+    if (newValue) {
+      const suggestions = await fetchAddressSuggestions(newValue);
+      setAddressSuggestions(suggestions);
+      setShowSuggestions(true);
+    } else {
+      setAddressSuggestions([]);
+      setShowSuggestions(false);
+    }
+  };
+
+  const handleAddressSelect = async (selectedAddress: any) => {
+    const adgangsadresse = selectedAddress.adgangsadresse;
+    if (adgangsadresse) {
+      const street = [adgangsadresse.vejnavn, adgangsadresse.husnr].filter(Boolean).join(' ');
+      const postcode = adgangsadresse.postnr || '';
+      setAddress(street);
+      setPostcode(postcode);
+      setAddressSuggestions([]);
+      setShowSuggestions(false);
+
+      // Fetch and set the city based on the selected postcode
+      const cityName = await fetchCity(postcode);
+      if (cityName) {
+        setCity(cityName);
+      }
+    }
+  };
+
+  const handleClickOutside = (event: MouseEvent) => {
+    if (suggestionListRef.current && !suggestionListRef.current.contains(event.target as Node)) {
+      setShowSuggestions(false);
+    }
+  };
+
+  useEffect(() => {
+    document.addEventListener('click', handleClickOutside);
+    return () => {
+      document.removeEventListener('click', handleClickOutside);
+    };
+  }, []);
+
+  useEffect(() => {
+    const fetchAndSetCity = async () => {
+      if (postcode) {
+        const cityName = await fetchCity(postcode);
+        if (cityName) {
+          setCity(cityName);
+        }
+      }
+    };
+    fetchAndSetCity();
+  }, [postcode, setCity]);
+
+  return (
+    <div className="relative mb-4">
+      <label htmlFor="address" className="block text-sm font-medium text-gray-700">Address</label>
+      <input
+        id="address"
+        type="text"
+        value={address}
+        onChange={handleAddressChange}
+        className="mt-1 p-2 block w-full border border-gray-300 rounded-md shadow-sm"
+        required
+      />
+      {showSuggestions && addressSuggestions.length > 0 && (
+        <ul ref={suggestionListRef} className="absolute z-50 w-full bg-white border border-gray-300 rounded-md shadow-lg max-h-60 overflow-y-auto">
+          {addressSuggestions.map((suggestion, index) => {
+            const adgangsadresse = suggestion.adgangsadresse;
+            if (!adgangsadresse) return null;
+
+            const vejnavn = adgangsadresse.vejnavn || '';
+            const husnr = adgangsadresse.husnr || '';
+            const postnr = adgangsadresse.postnr || '';
+
+            return (
+              <li
+                key={index}
+                onMouseDown={() => handleAddressSelect(suggestion)}
+                className="p-2 hover:bg-gray-100 cursor-pointer"
+              >
+                {vejnavn} {husnr}, {postnr}
+              </li>
+            );
+          })}
+        </ul>
+      )}
+    </div>
+  );
+};
+
+export default AddressSuggestions;

src/app/components/Input.tsx

@@ -10,7 +10,7 @@ interface InputProps {
   placeholder?: string;
 }
 
-const Input: React.FC<InputProps> = ({ id, label, value, setChange, required = false, type = "text", placeholder }) => {
+const Input: React.FC<InputProps> = ({ id, label, value, setChange, required = false, type = "text", placeholder}) => {
   return (
     <div className="mb-4">
       <label htmlFor={id} className="block text-sm font-medium text-gray-700">

src/app/user/register/page.tsx

@@ -4,6 +4,7 @@ import { useState } from 'react';
 import { useRouter } from 'next/navigation';
 import Link from 'next/link';
 import Input from '@/app/components/Input';
+import AddressSuggestions from '@/app/components/AddressSuggestions';
 
 const RegisterPage = () => {
   const [role, setRole] = useState<'PRIVATE' | 'BUSINESS' | null>(null); // Initially, no role is selected
@@ -131,77 +132,59 @@ const RegisterPage = () => {
               </>
             )}
 
-            <div className="mb-4">
+            {/* Address Input */}
-              <label htmlFor="address" className="block text-sm font-medium text-gray-700">Address</label>
+            <AddressSuggestions
-              <input
+              address={address}
-                type="text"
+              setAddress={setAddress}
-                id="address"
+              postcode={postcode}
-                value={address}
+              setPostcode={setPostcode}
-                onChange={(e) => setAddress(e.target.value)}
+              setCity={setCity}
-                className="mt-1 p-2 block w-full border border-gray-300 rounded-md shadow-sm"
-                required
             />
-            </div>
+            {/* Postcode Input */}
-
+            <Input
-            <div className="mb-4">
-              <label htmlFor="postcode" className="block text-sm font-medium text-gray-700">Postcode</label>
-              <input
-                type="number"
               id="postcode"
+              label="Postcode"
+              type="text"
               value={postcode}
-                onChange={(e) => setPostcode(e.target.value)}
+              setChange={(e) => setPostcode(e.target.value)}
-                className="mt-1 p-2 block w-full border border-gray-300 rounded-md shadow-sm"
               required
             />
-            </div>
+            {/* City Input */}
-
+            <Input
-            <div className="mb-4">
-              <label htmlFor="city" className="block text-sm font-medium text-gray-700">City</label>
-              <input
-                type="text"
               id="city"
-                value={city}
+              label="City"
-                onChange={(e) => setCity(e.target.value)}
-                className="mt-1 p-2 block w-full border border-gray-300 rounded-md shadow-sm"
-                required
-              />
-            </div>
-
-            <div className="mb-4">
-              <label htmlFor="phone" className="block text-sm font-medium text-gray-700">Phone</label>
-              <input
               type="text"
+              value={city}
+              setChange={(e) => setCity(e.target.value)}
+              required
+            />
+
+            <Input 
               id="phone"
+              type="text"
+              label="Phone"
+              required
+              setChange={(e) => setPhone(e.target.value)}
               value={phone}
-                onChange={(e) => setPhone(e.target.value)}
-                className="mt-1 p-2 block w-full border border-gray-300 rounded-md shadow-sm"
-                required
             />
-            </div>
 
-            <div className="mb-4">
+            <Input 
-              <label htmlFor="email" className="block text-sm font-medium text-gray-700">Email</label>
-              <input
-                type="email"
               id="email"
+              type="email"
+              label="Email"
+              required
+              setChange={(e) => setEmail(e.target.value)}
               value={email}
-                onChange={(e) => setEmail(e.target.value)}
-                className="mt-1 p-2 block w-full border border-gray-300 rounded-md shadow-sm"
-                required
             />
-            </div>
 
-            <div className="mb-4">
+            <Input 
-              <label htmlFor="password" className="block text-sm font-medium text-gray-700">Password</label>
-              <input
-                type="password"
               id="password"
-                value={password}
+              type="password"
-                onChange={(e) => setPassword(e.target.value)}
+              label="Password"
-                className="mt-1 p-2 block w-full border border-gray-300 rounded-md shadow-sm"
               required
+              setChange={(e) => setPassword(e.target.value)}
+              value={password}
             />
-            </div>
 
             <button
               type="submit"