forked from git.gladyson/openmonetis
a7f63fb77a
- Replace ESLint with Biome for linting and formatting - Configure Biome with tabs, double quotes, and organized imports - Move all SQL/Drizzle queries from page.tsx files to data.ts files - Create new data.ts files for: ajustes, dashboard, relatorios/categorias - Update existing data.ts files: extrato, fatura (add lancamentos queries) - Remove all drizzle-orm imports from page.tsx files - Update README.md with new tooling info Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
52 lines
1.4 KiB
TypeScript
52 lines
1.4 KiB
TypeScript
/**
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* Utility functions for mathematical calculations
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*/
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/**
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* Calculates percentage change between two values
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* @param current - Current value
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* @param previous - Previous value
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* @returns Percentage change or null if previous is 0 and current is also 0
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*/
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export function calculatePercentageChange(
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current: number,
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previous: number,
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): number | null {
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const EPSILON = 0.01; // Considera valores menores que 1 centavo como zero
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if (Math.abs(previous) < EPSILON) {
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if (Math.abs(current) < EPSILON) return null;
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return current > 0 ? 100 : -100;
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}
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const change = ((current - previous) / Math.abs(previous)) * 100;
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// Protege contra valores absurdos (retorna null se > 1 milhão %)
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return Number.isFinite(change) && Math.abs(change) < 1000000 ? change : null;
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}
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/**
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* Calculates percentage of part relative to total
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* @param part - Part value
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* @param total - Total value
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* @returns Percentage (0-100)
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*/
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export function calculatePercentage(part: number, total: number): number {
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if (total === 0) {
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return 0;
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}
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return (part / total) * 100;
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}
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/**
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* Rounds number to specified decimal places
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* @param value - Value to round
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* @param decimals - Number of decimal places (default 2)
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* @returns Rounded number
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*/
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export function roundToDecimals(value: number, decimals: number = 2): number {
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const multiplier = 10 ** decimals;
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return Math.round(value * multiplier) / multiplier;
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}
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