pdga-rating/views/partials/ratings-cards.ejs

<%
// Mobile sparkline helper — parametrised, used only in this partial
function renderSparkline(values, opts) {
    opts = opts || {};
    var w = opts.w || 70;
    var h = opts.h || 26;
    if (!values || values.length < 2) return '';
    var min = Math.min.apply(null, values);
    var max = Math.max.apply(null, values);
    var range = max - min || 1;
    var xStep = w / (values.length - 1);

    var pts = values.map(function(v, i) {
        return {
            x: (i * xStep).toFixed(1),
            y: (((max - v) / range) * (h - 4) + 2).toFixed(1)
        };
    });

    var linePath = pts.map(function(p, i) {
        return (i === 0 ? 'M' : 'L') + ' ' + p.x + ' ' + p.y;
    }).join(' ');

    var last = pts[pts.length - 1];
    var areaPath = linePath + ' L ' + last.x + ' ' + h + ' L 0 ' + h + ' Z';

    return '<svg width="' + w + '" height="' + h + '" viewBox="0 0 ' + w + ' ' + h + '" class="m-chart-spark" aria-hidden="true">' +
        '<path d="' + areaPath + '" style="fill:var(--accent);fill-opacity:0.10"/>' +
        '<path d="' + linePath + '" style="stroke:var(--accent);stroke-width:1.5;fill:none;stroke-linejoin:round;stroke-linecap:round"/>' +
        '<circle cx="' + last.x + '" cy="' + last.y + '" r="2.5" style="fill:var(--accent)"/>' +
        '</svg>';
}
%>

<% if (ratings.length === 0) { %>
    <p style="text-align: center; color: var(--ink-3); padding: 40px 0;">No players tracked yet.</p>
<% } else { %>
<div class="mobile-section-head">
    <span class="kicker">TRACKED PLAYERS &middot; <%= ratings.length %></span>
    <button id="trendchart-toggle-mobile" class="pill-button" type="button" aria-pressed="false">Trend chart</button>
</div>
<div class="mobile-list">
    <% ratings.forEach(function(player, index) {
        var sparkSvg = renderSparkline(player.monthlyHistory || [], { w: 70, h: 26 });
        var isFirst = index === 0;
        var rank = index + 1;

        var ratingIsNull = (player.rating == null);
        var ratingCls = ratingIsNull ? 'flat' : (player.ratingChange > 0 ? 'up' : player.ratingChange < 0 ? 'down' : 'flat');
        var ratingGlyph = (ratingIsNull || player.ratingChange === 0) ? '–' : (player.ratingChange > 0 ? '▲' : '▼');
        var ratingNum = ratingIsNull ? '—' : (player.ratingChange > 0 ? '+' + player.ratingChange : String(player.ratingChange));

        var predIsNull = (player.predictedRating == null);
        var predCls = predIsNull ? 'flat' : (player.deltaPredicted > 0 ? 'up' : player.deltaPredicted < 0 ? 'down' : 'flat');
        var predGlyph = (predIsNull || player.deltaPredicted === 0) ? '–' : (player.deltaPredicted > 0 ? '▲' : '▼');
        var predNum = predIsNull ? '—' : (player.deltaPredicted > 0 ? '+' + player.deltaPredicted : String(player.deltaPredicted));
    %>
    <div class="m-card" id="m-card-<%= player.pdgaNumber %>"
         tabindex="0" role="button" aria-expanded="false" aria-label="Expand player details"
         onclick="toggleMobilePlayerCard(<%= player.pdgaNumber %>)"
         onkeydown="if(event.key==='Enter'||event.key===' '){event.preventDefault();toggleMobilePlayerCard(<%= player.pdgaNumber %>);}">
        <div class="m-card__head">
            <div class="m-rank-chip<%= isFirst ? ' m-rank-chip--first' : '' %>"><%= rank %></div>
            <div class="m-card__name-stack">
                <span class="m-player-name"><%= player.name %></span>
                <span class="m-pdga-num">#<%= player.pdgaNumber %></span>
            </div>
            <span class="m-chevron">&#9660;</span>
        </div>

        <div class="m-card__body">
            <div class="m-card__stats">
                <div class="m-stat-row">
                    <span class="m-stat-label">RATING</span>
                    <span class="m-num"><%= player.rating || '—' %></span>
                    <span class="delta-pill <%= ratingCls %>"><span class="delta-glyph"><%= ratingGlyph %></span><span class="delta-num"><%= ratingNum %></span></span>
                </div>
                <div class="m-stat-row">
                    <span class="m-stat-label">PREDICTED</span>
                    <span class="m-num m-num--predicted"><%= player.predictedRating || '—' %></span>
                    <span class="delta-pill <%= predCls %> delta-predicted-pill"><span class="delta-glyph"><%= predGlyph %></span><span class="delta-num"><%= predNum %></span></span>
                </div>
            </div>
            <% if (sparkSvg) { %>
            <div class="m-card__sparkline"><span class="sparkline"><%- sparkSvg %></span></div>
            <% } %>
        </div>

        <div class="m-card__expand">
            <% if (player.ratingHistory && player.ratingHistory.length > 0) { %>
            <div class="player-chart m-chart"
                 data-variant="mobile"
                 data-history="<%= JSON.stringify(player.ratingHistory) %>">
            </div>
            <% } %>
            <dl class="m-detail-grid">
                <div>
                    <dt>Current rating</dt>
                    <dd><%= player.rating || '—' %></dd>
                </div>
                <div>
                    <dt>Last month</dt>
                    <dd><%= player.lastMonthRating || '—' %></dd>
                </div>
                <div>
                    <dt>Change vs last month</dt>
                    <dd><span class="delta-pill <%= ratingCls %>"><span class="delta-glyph"><%= ratingGlyph %></span><span class="delta-num"><%= ratingNum %></span></span></dd>
                </div>
                <div>
                    <dt>Predicted next update</dt>
                    <dd><%= player.predictedRating || '—' %></dd>
                </div>
                <div>
                    <dt>Gap to predicted</dt>
                    <dd><span class="delta-pill <%= predCls %> delta-predicted-pill"><span class="delta-glyph"><%= predGlyph %></span><span class="delta-num"><%= predNum %></span></span></dd>
                </div>
                <% if (player.stdDev != null && player.rating) { %>
                <div>
                    <dt>Round spread</dt>
                    <dd>±<%= player.stdDev %> (range <%= player.rating - player.stdDev %>–<%= player.rating + player.stdDev %>)</dd>
                </div>
                <% } %>
            </dl>
        </div>
    </div>
    <% }); %>
</div>
<% } %>