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import { COLON, HYPHEN, NEWLINE } from '~/lib/utils/text_utility';
/**
* Returns the start and end `sourcepos` rows, converted to zero-based numbering.
*
* @param {String} sourcepos Source position in format `23:3-23:14`
* @returns {Array<Number>} Start and end `sourcepos` rows, zero-based numbered
*/
const getSourceposRows = (sourcepos) => {
const [startRange, endRange] = sourcepos.split(HYPHEN);
const [startRow] = startRange.split(COLON);
const [endRow] = endRange.split(COLON);
return [startRow - 1, endRow - 1];
};
/**
* Given a `ul` or `ol` element containing a new sort order, this function returns
* an array of this new order which is derived from its list items' sourcepos values.
*
* @param {HTMLElement} list A `ul` or `ol` element containing a new sort order
* @returns {Array<Number>} A numerical array representing the new order of the list.
* The numbers represent the rows of the original markdown source.
*/
const getNewSourcePositions = (list) => {
const newSourcePositions = [];
Array.from(list.children).forEach((listItem) => {
const [start, end] = getSourceposRows(listItem.dataset.sourcepos);
for (let i = start; i <= end; i += 1) {
newSourcePositions.push(i);
}
});
return newSourcePositions;
};
/**
* Converts a description to one with a new list sort order.
*
* Given a description like:
*
* <pre>
* 1. I am text
* 2.
* 3. - Item 1
* 4. - Item 2
* 5. - Item 3
* 6. - Item 4
* 7. - Item 5
* </pre>
*
* And a reordered list (due to dragging Item 2 into Item 1's position) like:
*
* <pre>
* <ul data-sourcepos="3:1-7:8">
* <li data-sourcepos="4:1-6:10">
* Item 2
* <ul data-sourcepos="5:3-6:10">
* <li data-sourcepos="5:3-5:10">Item 3</li>
* <li data-sourcepos="6:3-6:10">Item 4</li>
* </ul>
* </li>
* <li data-sourcepos="3:1-3:8">Item 1</li>
* <li data-sourcepos="7:1-7:8">Item 5</li>
* </ul>
* </pre>
*
* This function returns:
*
* <pre>
* 1. I am text
* 2.
* 3. - Item 2
* 4. - Item 3
* 5. - Item 4
* 6. - Item 1
* 7. - Item 5
* </pre>
*
* @param {String} description Description in markdown format
* @param {HTMLElement} list A `ul` or `ol` element containing a new sort order
* @returns {String} Markdown with a new list sort order
*/
export const convertDescriptionWithNewSort = (description, list) => {
const descriptionLines = description.split(NEWLINE);
const [startIndexOfList] = getSourceposRows(list.dataset.sourcepos);
getNewSourcePositions(list)
.map((lineIndex) => descriptionLines[lineIndex])
.forEach((line, index) => {
descriptionLines[startIndexOfList + index] = line;
});
return descriptionLines.join(NEWLINE);
};
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