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Add pagination to ranking system #67

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06906b2
Add pagination to ranking system
kcprdev May 31, 2026
9816c61
Format pagination implementation with Prettier
kcprdev May 31, 2026
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180 changes: 101 additions & 79 deletions frontend/leaderboard.html
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -86,6 +86,8 @@ <h1 class="page-title">Leaderboard</h1>
</div>
</div>

<div id="leaderboard-stats"></div>

<div class="leaderboard">
<div class="leaderboard-header">
<div>Rank</div>
Expand Down Expand Up @@ -125,32 +127,17 @@ <h1 class="page-title">Leaderboard</h1>
flex-wrap: wrap;
"
>
<button
id="load-more-btn"
class="btn btn-secondary"
onclick="loadMoreNodes()"
style="
font-family: &quot;Space Mono&quot;, monospace;
font-size: 0.9rem;
white-space: nowrap;
display: none;
"
>
./fetch_more_nodes
</button>
<button
id="scroll-top-btn"
class="btn btn-primary"
onclick="window.scrollTo({ top: 0, behavior: 'smooth' })"
style="
font-family: &quot;Space Mono&quot;, monospace;
font-size: 0.9rem;
white-space: nowrap;
display: none;
"
>
^ scroll_to_top
</button>
<select id="items-per-page">
<option value="10">10 rows</option>
<option value="25" selected>25 rows</option>
<option value="50">50 rows</option>
</select>

<button id="prev-page-btn">Previous</button>

<div id="page-numbers"></div>

<button id="next-page-btn">Next</button>
</div>
</div>
</main>
Expand Down Expand Up @@ -194,36 +181,44 @@ <h1 class="page-title">Leaderboard</h1>
applyFiltersAndRender();
}
});
document
.getElementById("prev-page-btn")
?.addEventListener("click", () => {
if (currentPage > 1) {
currentPage--;
applyFiltersAndRender();
}
});

document
.getElementById("next-page-btn")
?.addEventListener("click", () => {
const totalPages = Math.ceil(
leaderboardData[activeDatasetType].length / itemsPerPage,
);

if (currentPage < totalPages) {
currentPage++;
applyFiltersAndRender();
}
});

document
.getElementById("items-per-page")
?.addEventListener("change", (e) => {
itemsPerPage = parseInt(e.target.value);
currentPage = 1;
applyFiltersAndRender();
});
fetchLeaderboardData();
});

const leaderboardData = {};
let currentDisplayLimit = 0;
let currentPage = 1;
let itemsPerPage = 25;
let activeDatasetType = "overall";
let fetchMoreClicks = 0;
let currentSearchTerm = "";

function getInitialLimit() {
return window.innerWidth <= 768 ? 12 : 25;
}

function loadMoreNodes() {
const data = leaderboardData[activeDatasetType];
const isMobile = window.innerWidth <= 768;
const maxClicks = isMobile ? 3 : 2;

fetchMoreClicks++;

if (fetchMoreClicks >= maxClicks) {
currentDisplayLimit = data.length;
} else {
currentDisplayLimit += getInitialLimit();
}

renderLeaderboard(data);
}

async function fetchLeaderboardData() {
const endpoints = ["overall", "monthly", "weekly", "daily"];
const cacheBuster = Date.now();
Expand Down Expand Up @@ -294,9 +289,6 @@ <h1 class="page-title">Leaderboard</h1>
}

function applyFiltersAndRender() {
if (currentDisplayLimit === 0) {
currentDisplayLimit = getInitialLimit();
}
if (!leaderboardData[activeDatasetType]) return;

const originalData = leaderboardData[activeDatasetType];
Expand All @@ -308,27 +300,55 @@ <h1 class="page-title">Leaderboard</h1>

const filteredData = rankedData.filter((user) => {
if (!currentSearchTerm) return true;

return (
user.name.toLowerCase().includes(currentSearchTerm) ||
user.id.toLowerCase().includes(currentSearchTerm)
);
});

// Update result count
const countEl = document.getElementById("search-result-count");

if (currentSearchTerm) {
const total = originalData.length;
const matched = filteredData.length;

countEl.textContent = `${matched}/${total}`;
countEl.style.opacity = "1";
} else {
countEl.textContent = "";
countEl.style.opacity = "0";
}

document.getElementById("prev-page-btn").disabled = currentPage === 1;

document.getElementById("next-page-btn").disabled =
currentPage === Math.ceil(filteredData.length / itemsPerPage);
const statsEl = document.getElementById("leaderboard-stats");

const totalPages = Math.ceil(filteredData.length / itemsPerPage);

const startRow =
filteredData.length === 0 ? 0 : (currentPage - 1) * itemsPerPage + 1;

const endRow = Math.min(
currentPage * itemsPerPage,
filteredData.length,
);

statsEl.innerHTML = `
<div style="
text-align:center;
color:var(--text-dim);
margin-bottom:1rem;
font-family:'Fira Code', monospace;
">
Total Users: ${filteredData.length}
| Showing: ${startRow}-${endRow}
| Page: ${currentPage}/${totalPages}
</div>
`;
renderLeaderboard(filteredData);
}

function getRankTag(rank) {
switch (rank) {
case 1:
Expand All @@ -351,9 +371,12 @@ <h1 class="page-title">Leaderboard</h1>

const isSearching = currentSearchTerm.length > 0;

const startIndex = (currentPage - 1) * itemsPerPage;
const endIndex = startIndex + itemsPerPage;

const displayData = isSearching
? data
: data.slice(0, currentDisplayLimit);
: data.slice(startIndex, endIndex);

if (displayData.length === 0) {
body.innerHTML = `
Expand All @@ -367,10 +390,6 @@ <h1 class="page-title">Leaderboard</h1>
[SYS]: NO_MATCHING_USERS_FOUND
</div>
`;

document.getElementById("load-more-btn").style.display = "none";
document.getElementById("scroll-top-btn").style.display = "none";

return;
}

Expand Down Expand Up @@ -418,30 +437,34 @@ <h1 class="page-title">Leaderboard</h1>
`;
mobileCards.appendChild(card);
});
renderPagination(data.length);
}
function renderPagination(totalItems) {
const pageNumbers = document.getElementById("page-numbers");

if (!isSearching && data.length > currentDisplayLimit) {
document.getElementById("load-more-btn").style.display =
"inline-block";
document.getElementById("scroll-top-btn").style.display = "none";
if (!pageNumbers) return;

const isMobile = window.innerWidth <= 768;
const textTransitionClick = isMobile ? 2 : 1;
const totalPages = Math.ceil(totalItems / itemsPerPage);

if (fetchMoreClicks >= textTransitionClick) {
document.getElementById("load-more-btn").innerHTML =
"./fetch_all_nodes";
} else {
document.getElementById("load-more-btn").innerHTML =
"./fetch_more_nodes";
pageNumbers.innerHTML = "";

for (let i = 1; i <= totalPages; i++) {
const btn = document.createElement("button");
btn.classList.add("page-btn");
btn.textContent = i;

if (i === currentPage) {
btn.classList.add("active-page");
}
} else {
document.getElementById("load-more-btn").style.display = "none";
document.getElementById("scroll-top-btn").style.display = isSearching
? "none"
: "inline-block";

btn.onclick = () => {
currentPage = i;
applyFiltersAndRender();
};

pageNumbers.appendChild(btn);
}
}

function setActiveTab(activeTab) {
document.querySelectorAll(".tab").forEach((tab) => {
tab.classList.remove("active");
Expand All @@ -455,8 +478,7 @@ <h1 class="page-title">Leaderboard</h1>
}

activeDatasetType = activeTab;
currentDisplayLimit = getInitialLimit();
fetchMoreClicks = 0;
currentPage = 1;
applyFiltersAndRender();
}
</script>
Expand Down
52 changes: 52 additions & 0 deletions frontend/styles/main.css
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2161,3 +2161,55 @@ body::-webkit-scrollbar-thumb {
font-family: "Fira Code", monospace;
font-size: 0.85rem;
}

/* Pagination Styling */

#pagination-controls {
margin-top: 2rem;
align-items: center;
}

#pagination-controls button,
#pagination-controls select {
background: var(--bg-surface);
color: var(--green);
border: 1px solid var(--border-bright);
padding: 0.5rem 0.8rem;
font-family: "Fira Code", monospace;
cursor: pointer;
}

#pagination-controls button:hover,
#pagination-controls select:hover {
border-color: var(--green);
box-shadow: 0 0 8px rgba(0, 255, 65, 0.3);
}

#page-numbers {
display: flex;
gap: 0.4rem;
}

#page-numbers button {
min-width: 32px;
height: 32px;
background: var(--bg-surface);
color: var(--green);
border: 1px solid var(--border-bright);
cursor: pointer;
}

#page-numbers button:hover {
border-color: var(--green);
}

.active-page {
background: var(--green) !important;
color: black !important;
font-weight: bold;
}

#pagination-controls button:disabled {
opacity: 0.4;
cursor: not-allowed;
}