Copy Selected Cells in Sudokupad

copy_cells.user.js

// ==UserScript==
// @name        Copy Selected Cells
// @include     https://sudokupad.app/*
// @version     1
// @grant       none
// ==/UserScript==

(function () {
    function injectScript() {
        const script = document.createElement('script');
        script.textContent = `
            document.addEventListener('keydown', function(event) {
                if (event.ctrlKey && event.shiftKey && event.key === 'C') {
                    const selectedCells = Framework.app.puzzle.selectedCells;
                    const rows = new Set(selectedCells.map(cell => cell.row));
                    const cols = new Set(selectedCells.map(cell => cell.col));

                    let sorter = (a,b)=>(a.col+a.row*9 - b.col-b.row*9);
                    let cells = selectedCells;
                    if (rows.size == 9 && cols.size == 9 && selectedCells.length == 17) {
                        // Handle the one row one col case.
                        const mostCommonRow = Object.entries(selectedCells.reduce(
                            (acc, { row }) => (acc[row] = (acc[row] || 0) + 1, acc), {})
                        ).reduce((max, curr) => curr[1] > max[1] ? curr : max)[0];
                        const mostCommonCol = Object.entries(selectedCells.reduce(
                            (acc, { col }) => (acc[col] = (acc[col] || 0) + 1, acc), {})
                        ).reduce((max, curr) => curr[1] > max[1] ? curr : max)[0];

                        const row = selectedCells.filter(cell => cell.row == mostCommonRow).sort(sorter);
                        const col = selectedCells.filter(cell => cell.col == mostCommonCol).sort(sorter);

                        cells = row.concat(col);
                    } else {
                        cells = selectedCells.sort(sorter);
                    }

                    const values = cells.map(cell => cell.value || cell.given).join('');
                    navigator.clipboard.writeText(values);
                }
            });
        `;
        document.head.appendChild(script);
    }

    injectScript();
})();