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Shared utility functions for the IoT Solutions platform\n\nimport type { ValidationError, FormErrors } from './types.ts';\n\n/**\n * Format currency values\n */\nexport function formatCurrency(amount: number, currency = 'USD'): string {\n return new Intl.NumberFormat('en-US', {\n style: 'currency',\n currency,\n }).format(amount);\n}\n\n/**\n * Format dates consistently\n */\nexport function formatDate(date: string | Date, options?: Intl.DateTimeFormatOptions): string {\n const dateObj = typeof date === 'string' ? new Date(date) : date;\n return new Intl.DateTimeFormat('en-US', {\n year: 'numeric',\n month: 'short',\n day: 'numeric',\n ...options,\n }).format(dateObj);\n}\n\n/**\n * Format date and time\n */\nexport function formatDateTime(date: string | Date): string {\n return formatDate(date, {\n year: 'numeric',\n month: 'short',\n day: 'numeric',\n hour: '2-digit',\n minute: '2-digit',\n });\n}\n\n/**\n * Generate a slug from a string\n */\nexport function generateSlug(text: string): string {\n return text\n .toLowerCase()\n .replace(/[^\\w\\s-]/g, '')\n .replace(/[\\s_-]+/g, '-')\n .replace(/^-+|-+$/g, '');\n}\n\n/**\n * Generate a random order number\n */\nexport function generateOrderNumber(): string {\n const timestamp = Date.now().toString(36);\n const random = Math.random().toString(36).substr(2, 5);\n return `IOT-${timestamp}-${random}`.toUpperCase();\n}\n\n/**\n * Validate email format\n */\nexport function isValidEmail(email: string): boolean {\n const emailRegex = /^[^\\s@]+@[^\\s@]+\\.[^\\s@]+$/;\n return emailRegex.test(email);\n}\n\n/**\n * Validate phone number (basic US format)\n */\nexport function isValidPhone(phone: string): boolean {\n const phoneRegex = /^\\+?1?[-.\\s]?\\(?([0-9]{3})\\)?[-.\\s]?([0-9]{3})[-.\\s]?([0-9]{4})$/;\n return phoneRegex.test(phone);\n}\n\n/**\n * Validate password strength\n */\nexport function validatePassword(password: string): ValidationError[] {\n const errors: ValidationError[] = [];\n \n if (password.length < 8) {\n errors.push({ field: 'password', message: 'Password must be at least 8 characters long' });\n }\n \n if (!/[A-Z]/.test(password)) {\n errors.push({ field: 'password', message: 'Password must contain at least one uppercase letter' });\n }\n \n if (!/[a-z]/.test(password)) {\n errors.push({ field: 'password', message: 'Password must contain at least one lowercase letter' });\n }\n \n if (!/\\d/.test(password)) {\n errors.push({ field: 'password', message: 'Password must contain at least one number' });\n }\n \n return errors;\n}\n\n/**\n * Convert validation errors array to form errors object\n */\nexport function validationErrorsToFormErrors(errors: ValidationError[]): FormErrors {\n return errors.reduce((acc, error) => {\n acc[error.field] = error.message;\n return acc;\n }, {} as FormErrors);\n}\n\n/**\n * Debounce function for search inputs\n */\nexport function debounce any>(\n func: T,\n wait: number\n): (...args: Parameters) => void {\n let timeout: ReturnType;\n return (...args: Parameters) => {\n clearTimeout(timeout);\n timeout = setTimeout(() => func(...args), wait);\n };\n}\n\n/**\n * Calculate order totals\n */\nexport function calculateOrderTotals(\n subtotal: number,\n taxRate = 0.08,\n shippingCost = 0\n): { subtotal: number; tax: number; shipping: number; total: number } {\n const tax = Math.round(subtotal * taxRate * 100) / 100;\n const total = subtotal + tax + shippingCost;\n \n return {\n subtotal,\n tax,\n shipping: shippingCost,\n total,\n };\n}\n\n/**\n * Calculate shipping cost based on order value and weight\n */\nexport function calculateShipping(orderValue: number, weight = 1): number {\n // Free shipping over $500\n if (orderValue >= 500) return 0;\n \n // Base shipping rate\n const baseRate = 15;\n const weightRate = Math.max(0, (weight - 1) * 5);\n \n return baseRate + weightRate;\n}\n\n/**\n * Truncate text to specified length\n */\nexport function truncateText(text: string, maxLength: number): string {\n if (text.length <= maxLength) return text;\n return text.substr(0, maxLength - 3) + '...';\n}\n\n/**\n * Get initials from name\n */\nexport function getInitials(firstName: string, lastName: string): string {\n return `${firstName.charAt(0)}${lastName.charAt(0)}`.toUpperCase();\n}\n\n/**\n * Format file size\n */\nexport function formatFileSize(bytes: number): string {\n const sizes = ['Bytes', 'KB', 'MB', 'GB'];\n if (bytes === 0) return '0 Bytes';\n const i = Math.floor(Math.log(bytes) / Math.log(1024));\n return Math.round(bytes / Math.pow(1024, i) * 100) / 100 + ' ' + sizes[i];\n}\n\n/**\n * Generate a random color for avatars\n */\nexport function generateAvatarColor(seed: string): string {\n const colors = [\n '#FF6B6B', '#4ECDC4', '#45B7D1', '#96CEB4', '#FFEAA7',\n '#DDA0DD', '#98D8C8', '#F7DC6F', '#BB8FCE', '#85C1E9'\n ];\n \n let hash = 0;\n for (let i = 0; i < seed.length; i++) {\n hash = seed.charCodeAt(i) + ((hash << 5) - hash);\n }\n \n return colors[Math.abs(hash) % colors.length];\n}\n\n/**\n * Check if user has permission\n */\nexport function hasPermission(userRole: string, requiredRole: string): boolean {\n const roleHierarchy = { customer: 0, admin: 1 };\n return roleHierarchy[userRole as keyof typeof roleHierarchy] >= \n roleHierarchy[requiredRole as keyof typeof roleHierarchy];\n}\n\n/**\n * Deep clone an object\n */\nexport function deepClone(obj: T): T {\n if (obj === null || typeof obj !== 'object') return obj;\n if (obj instanceof Date) return new Date(obj.getTime()) as unknown as T;\n if (obj instanceof Array) return obj.map(item => deepClone(item)) as unknown as T;\n if (typeof obj === 'object') {\n const clonedObj = {} as T;\n for (const key in obj) {\n if (obj.hasOwnProperty(key)) {\n clonedObj[key] = deepClone(obj[key]);\n }\n }\n return clonedObj;\n }\n return obj;\n}\n\n/**\n * Convert search params to query string\n */\nexport function buildQueryString(params: Record): string {\n const searchParams = new URLSearchParams();\n \n Object.entries(params).forEach(([key, value]) => {\n if (value !== undefined && value !== null && value !== '') {\n searchParams.append(key, String(value));\n }\n });\n \n return searchParams.toString();\n}\n\n/**\n * Parse query string to object\n */\nexport function parseQueryString(queryString: string): Record {\n const params = new URLSearchParams(queryString);\n const result: Record = {};\n \n for (const [key, value] of params.entries()) {\n result[key] = value;\n }\n \n return result;\n}","deleted","label",[167,149],"shared","permalink","https://www.val.town/x/lee_roy/Test2/code/shared/utils.ts","extension","actionData","errors"]