All files / games/src/opend6 difficulty.ts

100% Statements 39/39
100% Branches 17/17
100% Functions 6/6
100% Lines 38/38

Press n or j to go to the next uncovered block, b, p or k for the previous block.

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export enum RollDifficultyLabel {
    VERY_EASY = "Very Easy",
    EASY = "Easy",
    MODERATE = "Moderate",
    DIFFICULT = "Difficult",
    VERY_DIFFICULT = "Very Difficult",
    HEROIC = "Heroic",
}
 
export interface IRollDifficulty {
    label: RollDifficultyLabel;
    dieCode: string;
    meanResult: number;
}
 
export interface IRollDieCode {
    modifier: number;
    number: number;
}
 
const VERY_EASY_THRESHOLD = 5;
const EASY_THRESHOLD = 10;
const MODERATE_THRESHOLD = 15;
const DIFFICULT_THRESHOLD = 20;
const VERY_DIFFICULT_THRESHOLD = 25;
 
const getDifficultyLabel = (target: number): RollDifficultyLabel => {
    let label: RollDifficultyLabel = RollDifficultyLabel.VERY_EASY;
 
    if (target > VERY_EASY_THRESHOLD) {
        label = RollDifficultyLabel.EASY;
    }
 
    if (target > EASY_THRESHOLD) {
        label = RollDifficultyLabel.MODERATE;
    }
 
    if (target > MODERATE_THRESHOLD) {
        label = RollDifficultyLabel.DIFFICULT;
    }
 
    if (target > DIFFICULT_THRESHOLD) {
        label = RollDifficultyLabel.VERY_DIFFICULT;
    }
 
    if (target > VERY_DIFFICULT_THRESHOLD) {
        label = RollDifficultyLabel.HEROIC;
    }
 
    return label;
};
 
const getDieCode = (target: number): IRollDieCode => {
    const dieNumber: number = target > 3 ? Math.floor(target / 3.5) : 0;
    const dieModifier: number = dieNumber > 0 ? Math.floor(target - dieNumber * 3.5) : 0;
 
    return {
        modifier: dieModifier,
        number: dieNumber,
    };
};
 
const getDifficultyMeanResult = (target: number): number => {
    const dieCode = getDieCode(target);
 
    return target > 3 ? dieCode.number * 3.5 + dieCode.modifier : target;
};
 
const getDifficultyDieCode = (target: number): string => {
    const dieCode = getDieCode(target);
 
    const dieModifierString: string = dieCode.modifier > 0 ? `+${dieCode.modifier}` : "";
 
    return dieCode.number > 0 ? `${dieCode.number}D${dieModifierString}` : target.toString();
};
 
export const getDifficulty = (target: number): IRollDifficulty => {
    return {
        label: getDifficultyLabel(target),
        dieCode: getDifficultyDieCode(target),
        meanResult: getDifficultyMeanResult(target),
    };
};