@vrcd-community/zhlint/lib/replace-block.js

A linting tool for Chinese language.

export const isBlock = (piece) => {
    return !('nonBlock' in piece);
};
const replaceBlocks = (str, blocks) => {
    if (blocks.length === 0) {
        return {
            value: str,
            pieces: [{ value: str, start: 0, end: str.length, nonBlock: true }]
        };
    }
    const pieces = blocks.reduce((pieces, block, index) => {
        const { start, end } = block;
        const lastPiece = pieces[pieces.length - 1];
        const nextStart = lastPiece ? lastPiece.end : 0;
        // non-block piece before the current block.
        if (nextStart < start) {
            const nonBlockPiece = {
                nonBlock: true,
                start: nextStart,
                end: start,
                value: ''
            };
            nonBlockPiece.value = str.substring(nonBlockPiece.start, nonBlockPiece.end);
            pieces.push(nonBlockPiece);
        }
        // The current block piece.
        pieces.push(block);
        // Tailing non-block piece.
        if (index === blocks.length - 1 && end !== str.length) {
            const nonBlockPiece = {
                nonBlock: true,
                start: end,
                end: str.length,
                value: ''
            };
            nonBlockPiece.value = str.substring(nonBlockPiece.start, nonBlockPiece.end);
            pieces.push(nonBlockPiece);
        }
        return pieces;
    }, []);
    const value = pieces.map(({ value }) => value).join('');
    return { value, pieces };
};
export default replaceBlocks;