HaimKortovich
a2eb1f3789
- Add nuxt-skills (vue, nuxt, nuxt-ui) to .claude/skills/ - Create useCustomerSelection() composable for managing insured/buyer selection - Create usePolicyApi() composable for policy API operations - Update auto quote components to use insured/buyer instead of client - Update vehicle fields: remove valorVehiculo, add market_value, requested_value, rc_limits - Make chassis_number and engine_number optional - Update auto quote types and composables to match new API structure - Update auto quote page to submit to policy API with new structure
157 lines
3.3 KiB
Markdown
157 lines
3.3 KiB
Markdown
# Client Utilities
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Pure functions for formatting, validation, transformation, and parsing.
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## Quick Reference
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| Category | Examples |
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| ------------ | --------------------------------------------- |
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| Formatters | `formatCurrency`, `formatDate`, `formatBytes` |
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| Validators | `isValidEmail`, `isValidUrl`, `isValidPhone` |
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| Transformers | `slugify`, `truncate`, `capitalize` |
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| Parsers | `parseQuery`, `parseJSON`, `parseDate` |
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## Rules
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**Pure functions:**
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- Same input → same output
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- No side effects
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- No external state mutation
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- No API calls, no refs, no reactive
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**When NOT to use utils:**
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- Stateful logic → use composables
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- Vue-specific → use composables
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- Component logic → keep in component
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- API calls → use queries
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## Structure
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```ts
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// utils/formatters.ts
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export function formatCurrency(amount: number, currency = 'USD'): string {
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return new Intl.NumberFormat('en-US', {
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style: 'currency',
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currency,
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}).format(amount)
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}
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export function formatRelativeTime(date: Date): string {
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const rtf = new Intl.RelativeTimeFormat('en', { numeric: 'auto' })
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const diff = date.getTime() - Date.now()
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const days = Math.floor(diff / (1000 * 60 * 60 * 24))
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return rtf.format(days, 'day')
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}
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```
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**Naming:** Descriptive verbs (`formatCurrency`, `validateEmail`, `parseQuery`)
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**Organization:** Group by category (`formatters.ts`, `validators.ts`)
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**Exports:** Named exports only
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## Examples by Category
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**Formatters:**
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```ts
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// utils/formatters.ts
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export function formatBytes(bytes: number): string { ... }
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export function formatPhone(phone: string): string { ... }
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```
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**Validators:**
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```ts
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// utils/validators.ts
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export function isValidEmail(email: string): boolean {
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return /^[^\s@]+@[^\s@][^\s.@]*\.[^\s@]+$/.test(email)
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}
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export function isValidUrl(url: string): boolean {
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try { new URL(url); return true }
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catch { return false }
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}
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```
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**Transformers:**
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```ts
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// utils/transformers.ts
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export function slugify(text: string): string {
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return text.toLowerCase()
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.replace(/[^\w\s-]/g, '')
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.replace(/\s+/g, '-')
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}
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export function truncate(text: string, length: number): string {
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return text.length > length ? `${text.slice(0, length)}...` : text
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}
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```
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**Parsers:**
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```ts
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// utils/parsers.ts
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export function parseQuery(search: string): Record<string, string> {
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return Object.fromEntries(new URLSearchParams(search))
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}
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export function parseJSON<T>(json: string, fallback: T): T {
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try { return JSON.parse(json) }
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catch { return fallback }
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}
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```
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## Common Mistakes
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**Side effects (not pure):**
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```ts
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// ❌ Wrong - mutates external state
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let count = 0
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export function increment() {
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count++
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return count
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}
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// ✅ Correct - pure
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export function add(a: number, b: number): number {
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return a + b
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}
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```
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**Using utils for stateful logic:**
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```ts
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// ❌ Wrong - should be composable
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export function useCounter() { ... }
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// ✅ Correct - pure transformation
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export function formatCount(count: number): string { ... }
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```
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## Organization
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**Flat for small projects:**
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```
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utils/
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├── formatters.ts
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├── validators.ts
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└── transformers.ts
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```
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**Nested for large projects:**
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```
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utils/
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├── formatters/
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│ ├── date.ts
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│ ├── currency.ts
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│ └── index.ts
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└── validators/
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├── email.ts
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└── index.ts
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```
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