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Shared utility functions for the health platform\n\nexport function calculateBMI(weight: number, height: number, unit: 'metric' | 'imperial' = 'metric'): number {\n if (unit === 'imperial') {\n // Convert pounds to kg and inches to cm\n weight = weight * 0.453592;\n height = height * 2.54;\n }\n \n const heightInMeters = height / 100;\n return Number((weight / (heightInMeters * heightInMeters)).toFixed(1));\n}\n\nexport function getBMICategory(bmi: number): 'underweight' | 'normal' | 'overweight' | 'obese' {\n if (bmi < 18.5) return 'underweight';\n if (bmi < 25) return 'normal';\n if (bmi < 30) return 'overweight';\n return 'obese';\n}\n\nexport function getBMIDescription(category: string): string {\n const descriptions = {\n underweight: 'Below normal weight',\n normal: 'Normal weight',\n overweight: 'Above normal weight',\n obese: 'Significantly above normal weight'\n };\n return descriptions[category as keyof typeof descriptions] || 'Unknown';\n}\n\nexport function formatDate(date: string | Date): string {\n return new Date(date).toLocaleDateString('en-US', {\n year: 'numeric',\n month: 'short',\n day: 'numeric'\n });\n}\n\nexport function formatDateTime(date: string | Date): string {\n return new Date(date).toLocaleString('en-US', {\n year: 'numeric',\n month: 'short',\n day: 'numeric',\n hour: '2-digit',\n minute: '2-digit'\n });\n}\n\nexport function calculateAge(dateOfBirth: string): number {\n const today = new Date();\n const birthDate = new Date(dateOfBirth);\n let age = today.getFullYear() - birthDate.getFullYear();\n const monthDiff = today.getMonth() - birthDate.getMonth();\n \n if (monthDiff < 0 || (monthDiff === 0 && today.getDate() < birthDate.getDate())) {\n age--;\n }\n \n return age;\n}\n\nexport function parseBloodPressure(value: string): { systolic: number; diastolic: number } | null {\n const match = value.match(/(\\d+)\\/(\\d+)/);\n if (!match) return null;\n \n return {\n systolic: parseInt(match[1]),\n diastolic: parseInt(match[2])\n };\n}\n\nexport function formatBloodPressure(systolic: number, diastolic: number): string {\n return `${systolic}/${diastolic}`;\n}\n\nexport function getBloodPressureCategory(systolic: number, diastolic: number): string {\n if (systolic < 120 && diastolic < 80) return 'Normal';\n if (systolic < 130 && diastolic < 80) return 'Elevated';\n if (systolic < 140 || diastolic < 90) return 'High Blood Pressure Stage 1';\n if (systolic < 180 || diastolic < 120) return 'High Blood Pressure Stage 2';\n return 'Hypertensive Crisis';\n}\n\nexport function validateEmail(email: string): boolean {\n const emailRegex = /^[^\\s@]+@[^\\s@]+\\.[^\\s@]+$/;\n return emailRegex.test(email);\n}\n\nexport function validatePhone(phone: string): boolean {\n const phoneRegex = /^\\+?[\\d\\s\\-\\(\\)]{10,}$/;\n return phoneRegex.test(phone);\n}\n\nexport function generateId(): string {\n return Date.now().toString(36) + Math.random().toString(36).substr(2);\n}\n\nexport function debounce any>(\n func: T,\n wait: number\n): (...args: Parameters) => void {\n let timeout: number | undefined;\n return (...args: Parameters) => {\n clearTimeout(timeout);\n timeout = setTimeout(() => func(...args), wait);\n };\n}\n\nexport function getHealthTip(): string {\n const tips = [\n \"Drink at least 8 glasses of water daily to stay hydrated.\",\n \"Aim for 7-9 hours of quality sleep each night.\",\n \"Take a 10-minute walk after meals to aid digestion.\",\n \"Practice deep breathing for 5 minutes daily to reduce stress.\",\n \"Eat a variety of colorful fruits and vegetables.\",\n \"Stand up and stretch every hour if you work at a desk.\",\n \"Limit processed foods and choose whole foods instead.\",\n \"Schedule regular check-ups with your healthcare provider.\",\n \"Practice gratitude daily for better mental health.\",\n \"Stay socially connected with friends and family.\"\n ];\n \n return tips[Math.floor(Math.random() * tips.length)];\n}\n\nexport function calculateCaloriesBurned(activity: string, duration: number, weight: number): number {\n // MET (Metabolic Equivalent) values for common activities\n const metValues: Record = {\n walking: 3.8,\n running: 8.0,\n cycling: 6.8,\n swimming: 6.0,\n yoga: 2.5,\n weightlifting: 3.0,\n dancing: 4.8,\n hiking: 6.0\n };\n \n const met = metValues[activity.toLowerCase()] || 3.0;\n // Calories = MET × weight (kg) × time (hours)\n return Math.round(met * weight * (duration / 60));\n}\n\nexport function getExerciseRecommendation(age: number, fitnessLevel: string): string {\n if (age < 18) {\n return \"Aim for 60 minutes of physical activity daily, including aerobic and muscle-strengthening activities.\";\n } else if (age <= 64) {\n if (fitnessLevel === 'beginner') {\n return \"Start with 150 minutes of moderate aerobic activity per week, plus 2 days of strength training.\";\n } else if (fitnessLevel === 'intermediate') {\n return \"Aim for 150-300 minutes of moderate or 75-150 minutes of vigorous aerobic activity per week.\";\n } else {\n return \"Maintain 300+ minutes of moderate or 150+ minutes of vigorous activity per week for optimal health.\";\n }\n } else {\n return \"Focus on balance, flexibility, and strength training along with 150 minutes of moderate activity per week.\";\n }\n}","deleted","label",[169,151],"shared","permalink","https://www.val.town/x/SIR_FESTUS/MYHEALTHSOURCE/code/shared/utils.ts","extension","actionData","errors"]