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* Shared utility functions for YapTrap system\n * These utilities work in both frontend and backend environments\n */\n\nimport type { \n NormalizedMessage, \n Platform, \n LogLevel, \n SystemLog,\n YapTrapError \n} from './types.ts';\n\n// ID generation utilities\nexport function generateId(prefix?: string): string {\n const timestamp = Date.now().toString(36);\n const random = Math.random().toString(36).substring(2);\n return prefix ? `${prefix}_${timestamp}_${random}` : `${timestamp}_${random}`;\n}\n\nexport function generateConversationId(platform: Platform, platformId: string): string {\n return `conv_${platform}_${platformId.replace(/[^a-zA-Z0-9]/g, '_')}`;\n}\n\nexport function generateUserId(platform: Platform, platformUserId: string): string {\n return `user_${platform}_${platformUserId.replace(/[^a-zA-Z0-9]/g, '_')}`;\n}\n\n// Date and time utilities\nexport function formatTimestamp(date: Date): string {\n return date.toISOString();\n}\n\nexport function parseTimestamp(timestamp: string): Date {\n return new Date(timestamp);\n}\n\nexport function getTimeDifference(start: Date, end: Date): number {\n return end.getTime() - start.getTime();\n}\n\nexport function isWithinTimeWindow(timestamp: Date, windowMinutes: number): boolean {\n const now = new Date();\n const diffMinutes = (now.getTime() - timestamp.getTime()) / (1000 * 60);\n return diffMinutes <= windowMinutes;\n}\n\n// String utilities\nexport function sanitizeString(input: string): string {\n return input\n .replace(/[<>]/g, '') // Remove potential HTML tags\n .replace(/javascript:/gi, '') // Remove javascript: protocols\n .trim();\n}\n\nexport function truncateString(str: string, maxLength: number): string {\n if (str.length <= maxLength) return str;\n return str.substring(0, maxLength - 3) + '...';\n}\n\nexport function extractMentions(content: string): string[] {\n const mentionRegex = /@(\\w+)/g;\n const mentions: string[] = [];\n let match;\n \n while ((match = mentionRegex.exec(content)) !== null) {\n mentions.push(match[1]);\n }\n \n return mentions;\n}\n\nexport function removeMentions(content: string): string {\n return content.replace(/@\\w+/g, '').trim();\n}\n\n// Validation utilities\nexport function isValidEmail(email: string): boolean {\n const emailRegex = /^[^\\s@]+@[^\\s@]+\\.[^\\s@]+$/;\n return emailRegex.test(email);\n}\n\nexport function isValidUrl(url: string): boolean {\n try {\n new URL(url);\n return true;\n } catch {\n return false;\n }\n}\n\nexport function isValidPlatform(platform: string): platform is Platform {\n const validPlatforms: Platform[] = ['slack', 'sms', 'email', 'whatsapp', 'messenger'];\n return validPlatforms.includes(platform as Platform);\n}\n\nexport function isValidLogLevel(level: string): level is LogLevel {\n const validLevels: LogLevel[] = ['debug', 'info', 'warn', 'error'];\n return validLevels.includes(level as LogLevel);\n}\n\n// Object utilities\nexport function deepClone(obj: T): T {\n return JSON.parse(JSON.stringify(obj));\n}\n\nexport function mergeObjects>(target: T, source: Partial): T {\n return { ...target, ...source };\n}\n\nexport function pickProperties(obj: T, keys: K[]): Pick {\n const result = {} as Pick;\n keys.forEach(key => {\n if (key in obj) {\n result[key] = obj[key];\n }\n });\n return result;\n}\n\nexport function omitProperties(obj: T, keys: K[]): Omit {\n const result = { ...obj };\n keys.forEach(key => {\n delete result[key];\n });\n return result;\n}\n\n// Array utilities\nexport function uniqueArray(array: T[]): T[] {\n return [...new Set(array)];\n}\n\nexport function groupBy(array: T[], key: K): Record {\n return array.reduce((groups, item) => {\n const groupKey = String(item[key]);\n if (!groups[groupKey]) {\n groups[groupKey] = [];\n }\n groups[groupKey].push(item);\n return groups;\n }, {} as Record);\n}\n\nexport function sortBy(array: T[], key: keyof T, direction: 'asc' | 'desc' = 'asc'): T[] {\n return [...array].sort((a, b) => {\n const aVal = a[key];\n const bVal = b[key];\n \n if (aVal < bVal) return direction === 'asc' ? -1 : 1;\n if (aVal > bVal) return direction === 'asc' ? 1 : -1;\n return 0;\n });\n}\n\n// Message utilities\nexport function normalizeMessageContent(content: string): string {\n return content\n .replace(/\\s+/g, ' ') // Normalize whitespace\n .replace(/[^\\w\\s.,!?;:'\"()-]/g, '') // Remove special characters\n .trim();\n}\n\nexport function extractKeywords(content: string): string[] {\n const words = content\n .toLowerCase()\n .replace(/[^\\w\\s]/g, '')\n .split(/\\s+/)\n .filter(word => word.length > 3); // Filter out short words\n \n return uniqueArray(words);\n}\n\nexport function calculateMessageSimilarity(msg1: string, msg2: string): number {\n const words1 = new Set(extractKeywords(msg1));\n const words2 = new Set(extractKeywords(msg2));\n \n const intersection = new Set([...words1].filter(word => words2.has(word)));\n const union = new Set([...words1, ...words2]);\n \n return union.size === 0 ? 0 : intersection.size / union.size;\n}\n\n// Logging utilities\nexport function createLogEntry(\n level: LogLevel,\n component: string,\n message: string,\n metadata?: Record,\n conversationId?: string,\n userId?: string\n): SystemLog {\n return {\n id: generateId('log'),\n timestamp: new Date(),\n level,\n component,\n message,\n metadata,\n conversationId,\n userId\n };\n}\n\nexport function formatLogMessage(log: SystemLog): string {\n const timestamp = log.timestamp.toISOString();\n const level = log.level.toUpperCase().padEnd(5);\n const component = log.component.padEnd(15);\n \n let message = `[${timestamp}] ${level} ${component} ${log.message}`;\n \n if (log.conversationId) {\n message += ` (conv: ${log.conversationId})`;\n }\n \n if (log.userId) {\n message += ` (user: ${log.userId})`;\n }\n \n return message;\n}\n\n// Error handling utilities\nexport function createError(\n code: string,\n message: string,\n component: string,\n context?: Record\n): YapTrapError {\n return {\n code,\n message,\n component,\n timestamp: new Date(),\n context,\n stack: new Error().stack\n };\n}\n\nexport function isYapTrapError(error: any): error is YapTrapError {\n return error && \n typeof error.code === 'string' && \n typeof error.message === 'string' && \n typeof error.component === 'string' &&\n error.timestamp instanceof Date;\n}\n\n// Rate limiting utilities\nexport function createRateLimitKey(identifier: string, window: string): string {\n const timestamp = Math.floor(Date.now() / 1000);\n const windowSeconds = parseTimeWindow(window);\n const windowStart = Math.floor(timestamp / windowSeconds) * windowSeconds;\n return `${identifier}:${windowStart}`;\n}\n\nexport function parseTimeWindow(window: string): number {\n const match = window.match(/^(\\d+)([smhd])$/);\n if (!match) throw new Error(`Invalid time window format: ${window}`);\n \n const value = parseInt(match[1]);\n const unit = match[2];\n \n switch (unit) {\n case 's': return value;\n case 'm': return value * 60;\n case 'h': return value * 3600;\n case 'd': return value * 86400;\n default: throw new Error(`Invalid time unit: ${unit}`);\n }\n}\n\n// Configuration utilities\nexport function getConfigValue(\n config: Record,\n key: string,\n defaultValue: T\n): T {\n const keys = key.split('.');\n let value = config;\n \n for (const k of keys) {\n if (value && typeof value === 'object' && k in value) {\n value = value[k];\n } else {\n return defaultValue;\n }\n }\n \n return value as T;\n}\n\nexport function setConfigValue(\n config: Record,\n key: string,\n value: any\n): Record {\n const keys = key.split('.');\n const result = deepClone(config);\n let current = result;\n \n for (let i = 0; i < keys.length - 1; i++) {\n const k = keys[i];\n if (!current[k] || typeof current[k] !== 'object') {\n current[k] = {};\n }\n current = current[k];\n }\n \n current[keys[keys.length - 1]] = value;\n return result;\n}\n\n// Retry utilities\nexport async function withRetry(\n fn: () => Promise,\n maxAttempts: number = 3,\n delayMs: number = 1000,\n backoffMultiplier: number = 2\n): Promise {\n let lastError: Error;\n \n for (let attempt = 1; attempt <= maxAttempts; attempt++) {\n try {\n return await fn();\n } catch (error) {\n lastError = error as Error;\n \n if (attempt === maxAttempts) {\n throw lastError;\n }\n \n const delay = delayMs * Math.pow(backoffMultiplier, attempt - 1);\n await sleep(delay);\n }\n }\n \n throw lastError!;\n}\n\nexport function sleep(ms: number): Promise {\n return new Promise(resolve => setTimeout(resolve, ms));\n}\n\n// Environment utilities (backend only - check for Deno)\nexport function getEnvVar(key: string, defaultValue?: string): string {\n // Check if we're in a Deno environment (backend)\n if (typeof Deno !== 'undefined') {\n return Deno.env.get(key) || defaultValue || '';\n }\n \n // Frontend environment - return empty string or default\n return defaultValue || '';\n}\n\nexport function isProduction(): boolean {\n return getEnvVar('NODE_ENV') === 'production' || getEnvVar('DENO_ENV') === 'production';\n}\n\nexport function isDevelopment(): boolean {\n return !isProduction();\n}\n\n// Performance utilities\nexport function measureTime(fn: () => T): { result: T; duration: number } {\n const start = performance.now();\n const result = fn();\n const duration = performance.now() - start;\n return { result, duration };\n}\n\nexport async function measureTimeAsync(fn: () => Promise): Promise<{ result: T; duration: number }> {\n const start = performance.now();\n const result = await fn();\n const duration = performance.now() - start;\n return { result, duration };\n}\n\n// Hash utilities (simple hash for non-cryptographic purposes)\nexport function simpleHash(str: string): string {\n let hash = 0;\n for (let i = 0; i < str.length; i++) {\n const char = str.charCodeAt(i);\n hash = ((hash << 5) - hash) + char;\n hash = hash & hash; // Convert to 32-bit integer\n }\n return Math.abs(hash).toString(36);\n}","deleted","label",[167,149],"shared","permalink","https://www.val.town/x/lantholin/YapTrap/code/shared/utils.ts","extension","actionData","errors"]