39 lines
1.2 KiB
JavaScript
39 lines
1.2 KiB
JavaScript
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'use strict';
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function styleSectionsEqual({sections: a}, {sections: b}) {
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if (!a || !b) {
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return undefined;
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}
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if (a.length !== b.length) {
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return false;
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}
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// order of sections should be identical to account for the case of multiple
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// sections matching the same URL because the order of rules is part of cascading
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return a.every((sectionA, index) => propertiesEqual(sectionA, b[index]));
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function propertiesEqual(secA, secB) {
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for (const name of ['urlPrefixes', 'urls', 'domains', 'regexps']) {
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if (!equalOrEmpty(secA[name], secB[name], 'every', arrayMirrors)) {
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return false;
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}
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}
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return equalOrEmpty(secA.code, secB.code, 'substr', (a, b) => a === b);
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}
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function equalOrEmpty(a, b, telltale, comparator) {
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const typeA = a && typeof a[telltale] === 'function';
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const typeB = b && typeof b[telltale] === 'function';
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return (
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(a === null || a === undefined || (typeA && !a.length)) &&
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(b === null || b === undefined || (typeB && !b.length))
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) || typeA && typeB && a.length === b.length && comparator(a, b);
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}
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function arrayMirrors(array1, array2) {
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return (
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array1.every(el => array2.includes(el)) &&
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array2.every(el => array1.includes(el))
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);
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}
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}
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