Working example

src/routes/workout.remote.ts

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+import { query } from '$app/server';
+import { db } from '$lib/db';
+import { z } from 'zod';
+
+interface WorkOutData {
+	pushups: number;
+	situps: number;
+	plankSeconds: number;
+	runKm: number;
+}
+
+export const saveWorkout = query(
+	z.object({
+		pushups: z.number().min(0),
+		situps: z.number().min(0),
+		plankSeconds: z.number().min(0),
+		runKm: z.number().min(0)
+	}),
+	async (workoutData: WorkOutData) => {
+		const { pushups, situps, plankSeconds, runKm } = workoutData;
+
+		// Validate input data
+		if (typeof pushups !== 'number' || pushups < 0) {
+			throw new Error('Invalid pushups value');
+		}
+		if (typeof situps !== 'number' || situps < 0) {
+			throw new Error('Invalid situps value');
+		}
+		if (typeof plankSeconds !== 'number' || plankSeconds < 0) {
+			throw new Error('Invalid plank time value');
+		}
+		if (typeof runKm !== 'number' || runKm < 0) {
+			throw new Error('Invalid run distance value');
+		}
+
+		try {
+			// Insert or update today's workout
+			const result = await db.query(
+				`
+			INSERT INTO daily_exercises (date, pushups, situps, plank_time_seconds, run_distance_km)
+			VALUES (CURRENT_DATE, $1, $2, $3, $4)
+			ON CONFLICT (date)
+			DO UPDATE SET
+				pushups = $1,
+				situps = $2,
+				plank_time_seconds = $3,
+				run_distance_km = $4,
+				updated_at = CURRENT_TIMESTAMP
+			RETURNING *
+			`,
+				[pushups, situps, plankSeconds, runKm]
+			);
+
+			return {
+				success: true,
+				data: result.rows[0],
+				message: 'Workout saved successfully!'
+			};
+		} catch (error) {
+			console.error('Error saving workout:', error);
+			throw new Error('Failed to save workout to database');
+		}
+	}
+);
+
+export const getTodaysWorkout = query(async () => {
+	try {
+		// Get today's workout data
+		const result = await db.query('SELECT * FROM daily_exercises WHERE date = CURRENT_DATE');
+
+		if (result.rows.length === 0) {
+			return {
+				data: null,
+				message: 'No workout recorded for today'
+			};
+		}
+
+		return {
+			success: true,
+			data: result.rows[0]
+		};
+	} catch (error) {
+		console.error('Error fetching workout:', error);
+		throw new Error('Failed to fetch workout from database');
+	}
+});
+
+export const getWorkoutHistory = query(async (days: number = 7) => {
+	try {
+		// Get workout history for the last N days
+		const result = await db.query(
+			`
+			SELECT * FROM daily_exercises
+			WHERE date >= CURRENT_DATE - INTERVAL '$1 days'
+			ORDER BY date DESC
+			`,
+			[days]
+		);
+
+		return {
+			success: true,
+			data: result.rows,
+			message: `Retrieved ${result.rows.length} workout records`
+		};
+	} catch (error) {
+		console.error('Error fetching workout history:', error);
+		throw new Error('Failed to fetch workout history from database');
+	}
+});