ecki
64 lines
1.4 KiB
JavaScript
64 lines
1.4 KiB
JavaScript
const isMissingPositionColumn = (error) =>
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error &&
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error.code === "ER_BAD_FIELD_ERROR" &&
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String(error.sqlMessage || "").includes("position");
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const moveByPosition = async ({
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db,
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table,
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id,
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direction,
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selectQuery,
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missingColumnMessage,
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notFoundMessage,
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}) => {
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if (direction !== "up" && direction !== "down") {
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return { status: 400, body: { error: "Ungueltige Richtung" } };
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}
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let rows;
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try {
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await db.query(
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`UPDATE ${table} SET position = id WHERE position IS NULL`
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);
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;[rows] = await db.query(selectQuery);
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} catch (error) {
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if (isMissingPositionColumn(error)) {
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return { status: 400, body: { error: missingColumnMessage } };
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}
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throw error;
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}
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const index = rows.findIndex((row) => row.id == id);
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if (index === -1) {
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return { status: 404, body: { error: notFoundMessage } };
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}
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const swapIndex = direction === "up" ? index - 1 : index + 1;
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if (swapIndex < 0 || swapIndex >= rows.length) {
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return { status: 200, body: { success: true } };
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}
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const moved = rows.splice(index, 1)[0];
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rows.splice(swapIndex, 0, moved);
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for (let i = 0; i < rows.length; i++) {
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await db.query(
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`UPDATE ${table} SET position = ? WHERE id = ?`,
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[i + 1, rows[i].id]
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);
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}
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return { status: 200, body: { success: true } };
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};
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module.exports = {
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moveByPosition,
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isMissingPositionColumn,
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};
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