element-vir/dist/util/array.js

Heroic. Reactive. Declarative. Type safe. Web components without compromise.

export function insertAndRemoveValues(originalArray, valuesToInsert, indexesToRemove) {
    const noOperations = !valuesToInsert.length && !indexesToRemove.length;
    const nothingToDoBecauseEmptyArray = originalArray.length
        ? false
        : !valuesToInsert.filter((value) => !!value.index).length;
    if (noOperations || nothingToDoBecauseEmptyArray) {
        // there's nothing to do
        return [...originalArray];
    }
    const arrayValues = originalArray.map((entry) => {
        return [entry];
    });
    if (!arrayValues.length) {
        arrayValues[0] = [];
    }
    indexesToRemove.forEach((index) => {
        if (index >= 0 && index < originalArray.length) {
            arrayValues[index] = [];
        }
    });
    valuesToInsert.forEach((valueWrapper) => {
        const indexEntry = arrayValues[valueWrapper.index];
        if (indexEntry) {
            // insert new values before the already existing values
            indexEntry.splice(0, 0, ...valueWrapper.values);
        }
    });
    const finalArray = arrayValues.flat();
    return finalArray;
}