33 lines
1.5 KiB
JavaScript
33 lines
1.5 KiB
JavaScript
import { isFunction } from "../../../helpers/function.mjs";
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import { arrayFilter } from "../../../helpers/array.mjs";
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/**
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* Insert new items to the list.
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*
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* @private
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* @param {Array} indexedValues List of values for particular indexes.
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* @param {number} insertionIndex Position inside the actual list.
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* @param {Array} insertedIndexes List of inserted indexes.
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* @param {*} insertedValuesMapping Mapping which may provide value or function returning value for the specific parameters.
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* @returns {Array} List with new mappings.
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*/
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export function getListWithInsertedItems(indexedValues, insertionIndex, insertedIndexes, insertedValuesMapping) {
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const firstInsertedIndex = insertedIndexes.length ? insertedIndexes[0] : void 0;
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return [...indexedValues.slice(0, firstInsertedIndex), ...insertedIndexes.map((insertedIndex, ordinalNumber) => {
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if (isFunction(insertedValuesMapping)) {
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return insertedValuesMapping(insertedIndex, ordinalNumber);
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}
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return insertedValuesMapping;
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}), ...(firstInsertedIndex === void 0 ? [] : indexedValues.slice(firstInsertedIndex))];
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}
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/**
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* Filter items from the list.
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*
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* @private
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* @param {Array} indexedValues List of values for particular indexes.
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* @param {Array} removedIndexes List of removed indexes.
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* @returns {Array} Reduced list of mappings.
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*/
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export function getListWithRemovedItems(indexedValues, removedIndexes) {
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return arrayFilter(indexedValues, (_, index) => removedIndexes.includes(index) === false);
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} |