37 lines
1.1 KiB
JavaScript
37 lines
1.1 KiB
JavaScript
"use strict";
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function assertPositiveInt(name, value) {
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if (!Number.isInteger(value) || value <= 0) {
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throw new Error(`${name} must be a positive integer`);
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}
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}
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function validateCreditConfig(config) {
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assertPositiveInt("baseCredits", config.baseCredits);
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assertPositiveInt("includedChars", config.includedChars);
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assertPositiveInt("stepChars", config.stepChars);
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assertPositiveInt("stepCredits", config.stepCredits);
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assertPositiveInt("maxCharsPerArticle", config.maxCharsPerArticle);
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}
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function calculateCredits(charCount, config) {
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validateCreditConfig(config);
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if (!Number.isInteger(charCount) || charCount <= 0) {
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throw new Error("charCount must be a positive integer");
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}
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if (charCount > config.maxCharsPerArticle) {
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throw new Error("article_too_long");
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}
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const overage = Math.max(0, charCount - config.includedChars);
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const extraSteps = overage === 0 ? 0 : Math.ceil(overage / config.stepChars);
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return config.baseCredits + (extraSteps * config.stepCredits);
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}
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module.exports = {
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calculateCredits,
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validateCreditConfig,
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};
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