Merge pull request #15 from olegvodyanov/add_pagination

add pagination

.drone.yml

@@ -29,3 +29,4 @@ volumes:
 trigger:
   branch:
     - master
+    - develop

instalinks/links/views.py

@@ -16,11 +16,27 @@ def links_list(request):
     """
     Return JSON list of all links.
     """
-    if request.method == 'GET':
-        all_links = Link.objects.all().values('id', 'url', 'watched')
-        return JsonResponse(list(all_links), safe=False)
-    else:
-        return JsonResponse({'error': 'Method not allowed'}, status=405)
+
+    try:
+        page = int(request.GET.get('page', 1))
+        per_page = int(request.GET.get('per_page', 8))
+    except ValueError:
+        return JsonResponse({'error': 'Invalid page or per_page'}, status=400)
+
+    offset = (page - 1) * per_page
+    limit = offset + per_page
+
+    all_links = Link.objects.all().order_by('-id')  # latest first
+    total = all_links.count()
+    results = list(all_links[offset:limit].values('id', 'url', 'watched'))
+
+    return JsonResponse({
+        'results': results,
+        'total': total,
+        'page': page,
+        'per_page': per_page,
+        'pages': (total + per_page - 1) // per_page
+    })
 
 
 @csrf_exempt

static/links/main.js

@@ -3,52 +3,65 @@ const addLinkBtn = document.getElementById('addLinkBtn');
 const newLinksContainer = document.getElementById('newLinksContainer');
 const watchedLinksContainer = document.getElementById('watchedLinksContainer');
 
+const PER_PAGE = 8;
 let linksData = [];
+let currentPage = 1;
 
-// Fetch all links from the server
 function loadLinks() {
-  fetch('/api/links/')
+  fetch('/api/links/?page=${currentPage}&per_page=${PER_PAGE}')
     .then(res => res.json())
     .then(data => {
-      linksData = data;  // store in a global variable
-      renderLinks();
+      linksData = data.results;
+      renderPaginatedList(linksData, newLinksContainer, false, data.page, data.pages);
+      renderPaginatedList(linksData.filter(l => l.watched), watchedLinksContainer, true, data.page, data.pages);
     })
     .catch(err => console.error(err));
 }
 
-// Render the links into the two tabs
-function renderLinks() {
-  // separate them
-  const newLinks = linksData.filter(link => !link.watched);
-  const watchedLinks = linksData.filter(link => link.watched);
+function renderPaginatedList(linkList, container, isWatched, page, totalPages) {
+  container.innerHTML = '';
 
-  const newRow = document.createElement('div');
-  newRow.className = 'row gy-4';
+  const row = document.createElement('div');
+  row.className = 'row gy-4';
 
-  // Render "New" links
-  newLinksContainer.innerHTML = '';
-  newLinks.forEach(link => {
-    const col = document.createElement('div');
-    col.className = 'col-12 col-sm-6 col-md-4 col-lg-3'; // responsive columns
-    col.appendChild(createLinkElement(link, false));
-    newRow.appendChild(col);
-  });
-
-  newLinksContainer.appendChild(newRow);
-
-  const watchedRow = document.createElement('div');
-  watchedRow.className = 'row gy-4';
-
-  // Render "Watched" links
-  watchedLinksContainer.innerHTML = '';
-  watchedLinks.forEach(link => {
+  linkList
+    .filter(link => link.watched === isWatched)
+    .forEach(link => {
       const col = document.createElement('div');
       col.className = 'col-12 col-sm-6 col-md-4 col-lg-3';
-    col.appendChild(createLinkElement(link, true));
-    watchedRow.appendChild(col);
+      col.appendChild(createLinkElement(link, isWatched));
+      row.appendChild(col);
     });
 
-  watchedLinksContainer.appendChild(watchedRow);
+  container.appendChild(row);
+
+  // Pagination controls
+  if (totalPages > 1) {
+    const nav = document.createElement('div');
+    nav.className = 'd-flex justify-content-center mt-4 gap-2';
+
+    const prevBtn = document.createElement('button');
+    prevBtn.innerText = '← Previous';
+    prevBtn.className = 'btn btn-outline-primary';
+    prevBtn.disabled = page <= 1;
+    prevBtn.onclick = () => {
+      currentPage--;
+      loadLinks();
+    };
+
+    const nextBtn = document.createElement('button');
+    nextBtn.innerText = 'Next →';
+    nextBtn.className = 'btn btn-outline-primary';
+    nextBtn.disabled = page >= totalPages;
+    nextBtn.onclick = () => {
+      currentPage++;
+      loadLinks();
+    };
+
+    nav.appendChild(prevBtn);
+    nav.appendChild(nextBtn);
+    container.appendChild(nav);
+  }
 
   reinitializeInstagramEmbeds();
 }
@@ -95,7 +108,8 @@ function deleteLink(linkId) {
   .then(res => {
     if (res.ok) {
       linksData = linksData.filter(link => link.id !== linkId);
-      renderLinks();
+      currentPage = 1;
+      renderPaginatedList();
       reinitializeInstagramEmbeds();
     }
   })
@@ -121,7 +135,7 @@ function markLinkWatched(linkId) {
       if (idx !== -1) {
         linksData[idx] = updatedLink;
       }
-      renderLinks();
+      renderPaginatedList();
       reinitializeInstagramEmbeds();
     })
     .catch(err => console.error(err));
@@ -142,7 +156,8 @@ addLinkBtn.addEventListener('click', () => {
       // update local data
       linksData.push(addedLink);
       newLinkInput.value = '';
-      renderLinks();
+      currentPage = 1;
+      renderPaginatedList();
       reinitializeInstagramEmbeds();
     })
     .catch(err => console.error(err));