added demo stats page (needs refinement)

src/routes/stats/+page.server.ts

@@ -0,0 +1,149 @@
+import { db } from '$lib/server/db';
+import { dailyCompletions, type DailyCompletion } from '$lib/server/db/schema';
+import { eq, desc } from 'drizzle-orm';
+import type { PageServerLoad } from './$types';
+
+export const load: PageServerLoad = async ({ url }) => {
+	const anonymousId = url.searchParams.get('anonymousId');
+	
+	if (!anonymousId) {
+		return {
+			stats: null,
+			error: 'No anonymous ID provided'
+		};
+	}
+
+	try {
+		// Get all completions for this user
+		const completions = await db
+			.select()
+			.from(dailyCompletions)
+			.where(eq(dailyCompletions.anonymousId, anonymousId))
+			.orderBy(desc(dailyCompletions.date));
+
+		if (completions.length === 0) {
+			return {
+				stats: {
+					totalSolves: 0,
+					avgGuesses: 0,
+					gradeDistribution: {
+						'S++': 0,
+						'S+': 0,
+						'A+': 0,
+						'A': 0,
+						'B+': 0,
+						'B': 0,
+						'C+': 0,
+						'C': 0
+					},
+					currentStreak: 0,
+					bestStreak: 0,
+					recentCompletions: []
+				}
+			};
+		}
+
+		// Calculate basic stats
+		const totalSolves = completions.length;
+		const totalGuesses = completions.reduce((sum: number, c: DailyCompletion) => sum + c.guessCount, 0);
+		const avgGuesses = Math.round((totalGuesses / totalSolves) * 100) / 100;
+
+		// Calculate grade distribution
+		const gradeDistribution = {
+			'S++': 0, // This will be calculated differently since we don't store chapter correctness
+			'S+': completions.filter((c: DailyCompletion) => c.guessCount === 1).length,
+			'A+': completions.filter((c: DailyCompletion) => c.guessCount === 2).length,
+			'A': completions.filter((c: DailyCompletion) => c.guessCount === 3).length,
+			'B+': completions.filter((c: DailyCompletion) => c.guessCount >= 4 && c.guessCount <= 6).length,
+			'B': completions.filter((c: DailyCompletion) => c.guessCount >= 7 && c.guessCount <= 10).length,
+			'C+': completions.filter((c: DailyCompletion) => c.guessCount >= 11 && c.guessCount <= 15).length,
+			'C': completions.filter((c: DailyCompletion) => c.guessCount > 15).length
+		};
+
+		// Calculate streaks
+		const sortedDates = completions
+			.map((c: DailyCompletion) => c.date)
+			.sort();
+		
+		let currentStreak = 0;
+		let bestStreak = 0;
+		let tempStreak = 1;
+		
+		if (sortedDates.length > 0) {
+			// Check if current streak is active (includes today or yesterday)
+			const today = new Date().toISOString().split('T')[0];
+			const yesterday = new Date(Date.now() - 24 * 60 * 60 * 1000).toISOString().split('T')[0];
+			const lastPlayedDate = sortedDates[sortedDates.length - 1];
+			
+			if (lastPlayedDate === today || lastPlayedDate === yesterday) {
+				currentStreak = 1;
+				
+				// Count backwards from the most recent date
+				for (let i = sortedDates.length - 2; i >= 0; i--) {
+					const currentDate = new Date(sortedDates[i + 1]);
+					const prevDate = new Date(sortedDates[i]);
+					const daysDiff = Math.floor((currentDate.getTime() - prevDate.getTime()) / (1000 * 60 * 60 * 24));
+					
+					if (daysDiff === 1) {
+						currentStreak++;
+					} else {
+						break;
+					}
+				}
+			}
+			
+			// Calculate best streak
+			bestStreak = 1;
+			for (let i = 1; i < sortedDates.length; i++) {
+				const currentDate = new Date(sortedDates[i]);
+				const prevDate = new Date(sortedDates[i - 1]);
+				const daysDiff = Math.floor((currentDate.getTime() - prevDate.getTime()) / (1000 * 60 * 60 * 24));
+				
+				if (daysDiff === 1) {
+					tempStreak++;
+				} else {
+					bestStreak = Math.max(bestStreak, tempStreak);
+					tempStreak = 1;
+				}
+			}
+			bestStreak = Math.max(bestStreak, tempStreak);
+		}
+
+		// Get recent completions (last 7 days)
+		const recentCompletions = completions
+			.slice(0, 7)
+			.map((c: DailyCompletion) => ({
+				date: c.date,
+				guessCount: c.guessCount,
+				grade: getGradeFromGuesses(c.guessCount)
+			}));
+
+		return {
+			stats: {
+				totalSolves,
+				avgGuesses,
+				gradeDistribution,
+				currentStreak,
+				bestStreak,
+				recentCompletions
+			}
+		};
+
+	} catch (error) {
+		console.error('Error fetching user stats:', error);
+		return {
+			stats: null,
+			error: 'Failed to fetch stats'
+		};
+	}
+};
+
+function getGradeFromGuesses(guessCount: number): string {
+	if (guessCount === 1) return "S+";
+	if (guessCount === 2) return "A+";
+	if (guessCount === 3) return "A";
+	if (guessCount >= 4 && guessCount <= 6) return "B+";
+	if (guessCount >= 7 && guessCount <= 10) return "B";
+	if (guessCount >= 11 && guessCount <= 15) return "C+";
+	return "C";
+}