107 lines
3.1 KiB
TypeScript
107 lines
3.1 KiB
TypeScript
/**
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* Global Difficulty Mapping Utility
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* Maps numeric difficulty values (0-100) to number scale (1-5)
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* 1 = Very Easy (0-10)
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* 2 = Easy (11-30)
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* 3 = Medium (31-50)
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* 4 = Hard (51-70)
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* 5 = Very Hard (71-100)
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*/
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export const DIFFICULTY_RANGES = {
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'Very Easy': { min: 0, max: 10, number: 1 },
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'Easy': { min: 11, max: 30, number: 2 },
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'Medium': { min: 31, max: 50, number: 3 },
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'Hard': { min: 51, max: 70, number: 4 },
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'Very Hard': { min: 71, max: 100, number: 5 },
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} as const;
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export type DifficultyLabel = keyof typeof DIFFICULTY_RANGES;
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/**
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* Convert numeric difficulty (0-100) to number scale (1-5)
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*/
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export function getDifficultyNumber(difficulty: number | null | undefined): number | string {
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if (difficulty === null || difficulty === undefined) {
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return '-';
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}
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if (difficulty <= 10) return 1;
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if (difficulty <= 30) return 2;
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if (difficulty <= 50) return 3;
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if (difficulty <= 70) return 4;
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return 5;
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}
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/**
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* Convert numeric difficulty to label (legacy function - still used for filtering)
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*/
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export function getDifficultyLabel(difficulty: number | null | undefined): DifficultyLabel | string {
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if (difficulty === null || difficulty === undefined) {
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return '-';
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}
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if (difficulty <= 10) return 'Very Easy';
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if (difficulty <= 30) return 'Easy';
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if (difficulty <= 50) return 'Medium';
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if (difficulty <= 70) return 'Hard';
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return 'Very Hard';
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}
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/**
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* Convert difficulty label to numeric range for filtering
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*/
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export function getDifficultyRange(label: DifficultyLabel): { min: number; max: number } {
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return { min: DIFFICULTY_RANGES[label].min, max: DIFFICULTY_RANGES[label].max };
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}
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/**
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* Get all difficulty labels as array
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*/
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export function getDifficultyLabels(): DifficultyLabel[] {
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return Object.keys(DIFFICULTY_RANGES) as DifficultyLabel[];
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}
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/**
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* Get difficulty number from label (1-5)
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*/
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export function getDifficultyNumberFromLabel(label: DifficultyLabel): number {
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return DIFFICULTY_RANGES[label].number;
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}
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/**
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* Get difficulty label from number (1-5)
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*/
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export function getDifficultyLabelFromNumber(num: number): DifficultyLabel | null {
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for (const [label, range] of Object.entries(DIFFICULTY_RANGES)) {
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if (range.number === num) {
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return label as DifficultyLabel;
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}
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}
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return null;
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}
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/**
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* Get all difficulty numbers (1-5) with their labels
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*/
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export function getDifficultyOptions(): Array<{ value: string; label: string; number: number }> {
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return [
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{ value: '1', label: '1 - Very Easy', number: 1 },
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{ value: '2', label: '2 - Easy', number: 2 },
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{ value: '3', label: '3 - Medium', number: 3 },
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{ value: '4', label: '4 - Hard', number: 4 },
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{ value: '5', label: '5 - Very Hard', number: 5 },
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];
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}
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/**
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* Convert difficulty number (1-5) to 0-100 range value (using middle of range)
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* Used when saving form data where user selected 1-5 dropdown
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*/
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export function getDifficultyValueFromNumber(num: number): number {
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if (num <= 1) return 5; // Very Easy: middle of 0-10
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if (num === 2) return 20; // Easy: middle of 11-30
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if (num === 3) return 40; // Medium: middle of 31-50
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if (num === 4) return 60; // Hard: middle of 51-70
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return 85; // Very Hard: middle of 71-100
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}
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