feat(weekday): Add hide_weekend parameter to the weekday graph

app/api/streak/route.ts

@@ -13,10 +13,10 @@
   calculateStreak,
   calculateMonthlyStats,
   aggregateCalendars,
   convertLocalToUtc,
   chunkDaysIntoWeeks,
   normalizeCalendarToTimezone,
   isLeapYear,
   daysInYear,
 } from '@/lib/calculate';
 import {
@@ -55,7 +55,7 @@
 
 import { validationCache as _vc, normalizeCacheKey, cachedValidation } from './validation-cache';
 // Re-alias so existing usages in this file continue to work.
 const validationCache = _vc;
 
 const SVG_CSP_HEADER =
   "default-src 'none'; style-src 'unsafe-inline' https://fonts.googleapis.com; font-src https://fonts.gstatic.com; connect-src https://fonts.gstatic.com;";
@@ -169,6 +169,7 @@
       phi,
       border,
       minify,
+      hide_weekend,
     } = parseResult.data;
     const normalizedView = view as
       | 'default'
@@ -406,6 +407,7 @@
       theta,
       phi,
       compact,
+      hide_weekend,
     };
 
     let calendar;

lib/svg/weekday.ts

@@ -48,7 +48,13 @@ export function generateWeekdaySVG(
   params: BadgeParams,
   calendar: ContributionCalendar
 ): string {
-  const grouped = groupByWeekday(calendar);
+  let grouped = groupByWeekday(calendar);
+
+  if (params.hide_weekend) {
+    // Keep only Mon-Fri
+    grouped = grouped.filter((d, i) => i !== 0 && i !== 6);
+  }
+
   const max = Math.max(...grouped.map((d) => d.total), 1);
   const peakIndex = grouped.reduce((best, d, i, arr) => (d.total > arr[best].total ? i : best), 0);
 
@@ -59,7 +65,8 @@ export function generateWeekdaySVG(
   // Reserve ~40px at the top for the contributions subtitle and ~40px at the
   // bottom for the day-of-week labels, leaving the remainder for bar height.
   const chartHeight = height - 80;
-  const startX = (width - (7 * barWidth + 6 * gap)) / 2;
+  const numBars = grouped.length;
+  const startX = (width - (numBars * barWidth + (numBars - 1) * gap)) / 2;
 
   // params.accent can be HexColor | HexColor[] — normalize to a single color
   const accentColor = Array.isArray(params.accent)

lib/validations.ts

@@ -583,6 +583,7 @@ const baseStreakParamsSchema = z.object({
     .catch('rise')
     .default('rise'),
   badges: z.string().optional().transform(toBooleanFlag).default(false),
+  hide_weekend: z.string().optional().transform(toBooleanFlag).default(false),
 
   // Output format: 'svg' (default), 'json', or 'png' for image export.
   // Invalid values silently fall back to 'svg'.

types/index.ts

@@ -371,6 +371,9 @@ export interface BadgeParams {
   /** When true, renders a compact single-row card (~100px tall) with only username, avatar, and streak count. Skips the full isometric grid. */
   compact?: boolean;
 
+  /** When true, hides Saturday and Sunday from the weekday chart */
+  hide_weekend?: boolean;
+
   /** @internal Temporary property to track custom gradient ID during SVG generation. */
   __customGradientId?: string;
 }