86 lines
2.1 KiB
JavaScript
86 lines
2.1 KiB
JavaScript
class Lock {
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constructor(tokens, duration) {
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this.dateCreated = new Date();
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this.tokens = tokens;
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this.duration = duration;
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}
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}
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class Reputation {
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constructor() {
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this.tokens = 0;
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this.locks = new Set();
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}
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addTokens(tokens) {
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if (this.tokens + tokens < 0) {
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throw new Error(`Token balance can not become negative`);
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}
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this.tokens += tokens;
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}
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lockTokens(tokens, duration) {
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if (tokens > this.getAvailableTokens()) {
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throw new Error("Can not lock more tokens than are available")
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}
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const lock = new Lock(tokens, duration);
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this.locks.add(lock);
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// TODO: Prune locks once expired
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}
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getTokens() {
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return this.tokens;
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}
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getAvailableTokens() {
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const now = new Date();
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const tokensLocked = Array.from(this.locks.values())
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.filter(({dateCreated, duration}) => now - dateCreated < duration)
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.reduce((acc, cur) => acc += cur.tokens, 0);
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return Math.max(this.tokens - tokensLocked, 0);
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}
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}
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export class Reputations extends Map {
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getTokens(reputationPublicKey) {
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const reputation = this.get(reputationPublicKey);
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if (!reputation) {
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return 0;
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}
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return reputation.getTokens();
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}
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getAvailableTokens(reputationPublicKey) {
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const reputation = this.get(reputationPublicKey);
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if (!reputation) {
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return 0;
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}
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return reputation.getAvailableTokens();
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}
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addTokens(reputationPublicKey, tokens) {
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const reputation = this.get(reputationPublicKey) ?? new Reputation();
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reputation.addTokens(tokens);
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this.set(reputationPublicKey, reputation);
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}
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lockTokens(reputationPublicKey, tokens, duration) {
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if (!tokens || !duration) {
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return;
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}
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const reputation = this.get(reputationPublicKey);
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if (!reputation) {
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throw new Error(`${reputationPublicKey} has no tokens to lock`);
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}
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reputation.lockTokens(tokens, duration);
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}
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getTotal() {
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return Array.from(this.values()).reduce((acc, cur) => acc += cur.getTokens(), 0);
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}
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getTotalAvailable() {
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return Array.from(this.values()).reduce((acc, cur) => acc += cur.getAvailableTokens(), 0);
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}
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}
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