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| /** Format numbers for display — use abbreviation only for very large numbers */ | |
| export function formatNumber(value: any, decimals = 2): string { | |
| // Coerce to number — backend may return numeric stats as strings | |
| const num = typeof value === 'number' ? value : Number(value); | |
| if (value == null || isNaN(num)) return '-'; | |
| if (Math.abs(num) >= 10_000_000) return `${(num / 1_000_000).toFixed(1)}M`; | |
| if (Math.abs(num) >= 1_000_000) return `${(num / 1_000_000).toFixed(decimals)}M`; | |
| if (Number.isInteger(num)) return num.toLocaleString(); | |
| return num.toFixed(decimals); | |
| } | |
| /** Format a cell value for display in tables */ | |
| export function formatCellValue(value: any): string { | |
| if (value == null) return '\u2014'; // em dash | |
| if (typeof value === 'number') { | |
| // For small integers, just show them plainly | |
| if (Number.isInteger(value) && Math.abs(value) < 1_000_000) return value.toLocaleString(); | |
| return formatNumber(value); | |
| } | |
| if (typeof value === 'boolean') return value ? 'true' : 'false'; | |
| return String(value); | |
| } | |
| /** Return a CSS badge class for column type */ | |
| export function typeBadgeClass(columnType: string): string { | |
| const map: Record<string, string> = { | |
| numeric: 'badge-numeric', | |
| categorical: 'badge-categorical', | |
| datetime: 'badge-datetime', | |
| text: 'badge-text', | |
| geo_lat_lon: 'badge-geo', | |
| boolean: 'badge-boolean', | |
| unknown: 'badge-text', | |
| }; | |
| return map[columnType] || 'badge-text'; | |
| } | |
| /** Short label for column type */ | |
| export function typeLabel(columnType: string): string { | |
| const map: Record<string, string> = { | |
| numeric: '#', | |
| categorical: 'Aa', | |
| datetime: 'DT', | |
| text: 'T', | |
| geo_lat_lon: 'G', | |
| boolean: 'T/F', | |
| unknown: '?', | |
| }; | |
| return map[columnType] || '?'; | |
| } | |