336 lines
12 KiB
TypeScript
336 lines
12 KiB
TypeScript
import { Activity, Attribute, attributes, ActivityPerformance, getActivityAttribute, getAttributeActivities, Player, StandardsMap, Levels, Standard, Metrics, Gender } from "./util";
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// SOURCES
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// Squat, Bench, Dead Lift:
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// http://lonkilgore.com/resources/Lon_Kilgore_Strength_Standard_Tables-Copyright-2023.pdf
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// 1 mile run:
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// https://runninglevel.com/running-times/1-mile-times
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// Dash:
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// https://marathonhandbook.com/average-100-meter-time/
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// Broad Jump:
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//
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type LevelCalculatorConfig = {
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expandIters?: number;
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compressTo?: number;
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}
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type LevelCalculatorOutput = {
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player: number,
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attributes: Record<Attribute, number>
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}
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export class LevelCalculator {
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cfg: Required<LevelCalculatorConfig>;
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standards: Standards;
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public constructor(standards: Standards, cfg: LevelCalculatorConfig = {}) {
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this.cfg = {
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expandIters: cfg.expandIters ?? 5,
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compressTo: cfg.compressTo ?? 100
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}
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this.standards = standards;
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}
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// -------------------------------------------------------------------------------------------------
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// Level calculations
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// -------------------------------------------------------------------------------------------------
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public calculate(player: Player, activityPerformances: ActivityPerformance[]): LevelCalculatorOutput {
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const levels: LevelCalculatorOutput = {
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player: 0,
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attributes: {
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[attributes.STRENGTH]: 0,
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[attributes.POWER]: 0,
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[attributes.ENDURANCE]: 0,
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[attributes.AGILITY]: 0,
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} as const
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};
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for (const value of Object.values(player)) {
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if (!value)
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return levels;
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}
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levels.attributes = this.calculateAllAttributeLevels(player, activityPerformances);
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for (const level of Object.values(levels.attributes)) {
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if (!level)
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return levels;
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}
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const attrLevelsSum = Object.values(levels.attributes).reduce((sum, lvl) => sum + lvl, 0);
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levels.player = Math.round(attrLevelsSum / Object.keys(attributes).length);
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return levels;
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}
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private calculateAllAttributeLevels(
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player: Player,
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activityPerformances: ActivityPerformance[],
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): Record<Attribute, number> {
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const attrLevels: Record<Attribute, number> = {
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[attributes.STRENGTH]: 0,
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[attributes.POWER]: 0,
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[attributes.ENDURANCE]: 0,
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[attributes.AGILITY]: 0,
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} as const;
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for (const value of Object.values(player)) {
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if (!value)
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return attrLevels;
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}
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(Object.values(attributes) as Attribute[]).forEach((attribute) => {
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const attrActivityPerformances = activityPerformances.filter(
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(p) => getActivityAttribute(p.activity) === attribute,
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);
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attrLevels[attribute] = this.calculateAttributeLevel(attribute, player, attrActivityPerformances);
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});
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return attrLevels;
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}
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private calculateAttributeLevel(
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attribute: Attribute,
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player: Player,
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activityPerformances: ActivityPerformance[],
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): number {
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// must be activities of the given attribute
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if (activityPerformances.some((p) => getActivityAttribute(p.activity) !== attribute)) {
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throw new Error("Wrong activity performance attribute");
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}
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// must perform all of an attributes activities
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for (const activity of getAttributeActivities(attribute)) {
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const filteredActivites = activityPerformances.map((p) => p.activity);
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if (!filteredActivites.includes(activity))
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return 0;
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}
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// must have all activties using a valid performance value (> 0)
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for (const activityPerformance of activityPerformances) {
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if (activityPerformance.performance <= 0)
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return 0
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}
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const activityLevels = activityPerformances.map((p) => {
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const interpolatedStandard = this.getInterpolatedStandard(p.activity, player.metrics);
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return this.findLevel(interpolatedStandard, p.performance);
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});
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const activityLevelsAvg = Math.round(
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activityLevels.reduce((sum, curr) => sum + curr, 0) / activityLevels.length,
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);
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return activityLevelsAvg;
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}
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// -------------------------------------------------------------------------------------------------
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// Standards interpolation (heavy math bits)
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// -------------------------------------------------------------------------------------------------
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private getInterpolatedStandard(
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activity: Activity,
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metrics: Metrics,
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): Standard {
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const interpolateByWeight = (targetAge: number): Levels => {
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const { lower: lowerAgeWeightStandard, upper: upperAgeWeightStandard } = this.standards
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.byActivity(activity)
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.byGender(metrics.gender)
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.byAge(targetAge)
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.getNearest("weight", metrics.weight);
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const weightLower = lowerAgeWeightStandard.metrics.weight;
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const weightUpper = upperAgeWeightStandard.metrics.weight;
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let weightRatio = weightUpper === weightLower ? 1 : (metrics.weight - weightLower) / (weightUpper - weightLower);
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weightRatio = Math.max(0, Math.min(1, weightRatio));
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return this.interpolateLevels(lowerAgeWeightStandard.levels, upperAgeWeightStandard.levels, weightRatio);
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}
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// Find nearest age standards
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const { lower: lowerAgeStandard, upper: upperAgeStandard } = this.standards
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.byActivity(activity)
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.byGender(metrics.gender)
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.getNearest("age", metrics.age);
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const ageLower = lowerAgeStandard.metrics.age;
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const ageUpper = upperAgeStandard.metrics.age;
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// Interpolate by age and weight
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let ageRatio = ageUpper === ageLower ? 1 : (metrics.age - ageLower) / (ageUpper - ageLower);
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ageRatio = Math.max(0, Math.min(1, ageRatio));
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const interpolatedLevels = this.interpolateLevels(
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interpolateByWeight(ageLower),
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interpolateByWeight(ageUpper),
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ageRatio
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);
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return {
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metrics: metrics,
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levels: interpolatedLevels
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};
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}
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private interpolateLevels(
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lower: Levels,
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upper: Levels,
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ratio: number,
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): Levels {
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if (Object.keys(lower).length !== Object.keys(upper).length)
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throw new Error("Cannot interpolate between varying number of levels");
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const lerp = (lvl: string) => (lower[lvl] as number) + ((upper[lvl] as number) - (lower[lvl] as number)) * ratio;
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const interpolatedLevels = {};
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for (const lvl in lower) {
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interpolatedLevels[lvl] = lerp(lvl);
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}
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return interpolatedLevels;
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}
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// -------------------------------------------------------------------------------------------------
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// Level utilities (helpers)
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// -------------------------------------------------------------------------------------------------
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private findLevel(standard: Standard, performance: number): number {
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let resultLevel = 1;
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let resultLevelDiff = Infinity;
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for (const level in standard.levels) {
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const diff = Math.abs(performance - standard.levels[level as unknown as number]);
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if (diff < resultLevelDiff) {
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resultLevel = +level;
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resultLevelDiff = diff;
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}
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}
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return resultLevel;
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}
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}
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export class Standards {
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private standardsMap: StandardsMap;
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constructor(standardsMap: StandardsMap) {
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this.standardsMap = standardsMap;
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for (const activity of Object.keys(this.standardsMap) as Activity[]) {
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for (const standard of this.standardsMap[activity]) {
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const expandedLevels = this.expandLevels(standard.levels, 5);
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const compressedLevels = this.compressLevels(expandedLevels, 100);
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standard.levels = compressedLevels;
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}
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}
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}
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public byActivity(activity: Activity) {
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const self = this;
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const state: {
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gender?: Gender;
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age?: number;
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weight?: number;
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} = {};
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const execMethods = {
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getAll: function() {
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let filtered = [...self.standardsMap[activity]];
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if (state.gender)
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filtered = filtered.filter((s) => s.metrics.gender === state.gender);
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if (state.age)
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filtered = filtered.filter((s) => s.metrics.age === state.age);
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if (state.weight)
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filtered = filtered.filter((s) => s.metrics.weight === state.weight);
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return filtered;
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},
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getOne: function() {
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return execMethods.getAll()[0];
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},
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getNearest(metric: "age" | "weight", target: number) {
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const standards = execMethods.getAll();
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const lower = [...standards]
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.sort((a, b) => a.metrics[metric] - b.metrics[metric])
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.reverse()
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.find((s) => s.metrics[metric] <= target) ?? standards.at(0)!;
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const upper = [...standards]
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.sort((a, b) => a.metrics[metric] - b.metrics[metric])
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.find((s) => s.metrics[metric] >= target) ?? standards.at(-1)!;
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return { lower, upper };
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}
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};
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const byGender = (gender: Gender) => {
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state.gender = gender;
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return { byAge, ...execMethods };
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}
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const byAge = (age: number) => {
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state.age = age;
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return { byWeight, ...execMethods };
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}
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const byWeight = (weight: number) => {
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state.weight = weight;
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return { ...execMethods };
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}
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return { byGender, ...execMethods }
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}
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private expandLevels(
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levels: Levels,
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i: number
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): Levels {
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if (i == 0) {
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return levels;
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}
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const newLevels = {};
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let j = 1;
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for (let k = 0; k < Object.keys(levels).length; ++k) {
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const currLevel = Object.keys(levels)[k];
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const nextLevel = Object.keys(levels)[k + 1];
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newLevels[j++] = levels[currLevel];
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if (nextLevel) {
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newLevels[j++] = (levels[currLevel] + levels[nextLevel]) / 2;
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}
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}
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return this.expandLevels(newLevels, i - 1);
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}
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private compressLevels(
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levels: Levels,
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targetLevel: number,
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): Levels {
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const levelsAmount = Object.keys(levels).length;
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if (levelsAmount < targetLevel) {
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throw new Error(
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"Target levels amount must be greater than or equal to the current levels amount",
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);
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}
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const ratio = levelsAmount / targetLevel;
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const compressedLevels: Levels = {};
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for (let i = 0; i < targetLevel; ++i) {
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const ratioIndex = i * ratio;
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const lowerIndex = Math.floor(ratioIndex);
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const upperIndex = Math.ceil(ratioIndex);
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const lowerValue = levels[lowerIndex + 1];
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const upperValue = levels[upperIndex + 1];
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const weight = ratioIndex - lowerIndex;
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compressedLevels[i + 1] = lowerValue + (upperValue - lowerValue) * weight;
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}
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return compressedLevels;
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}
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}
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