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'use strict';
/*! * ignore */
const get = require('../get');
module.exports = applyTimestampsToUpdate;
/*! * ignore */
function applyTimestampsToUpdate(now, createdAt, updatedAt, currentUpdate, options) {  const updates = currentUpdate;  let _updates = updates;  const overwrite = get(options, 'overwrite', false);  const timestamps = get(options, 'timestamps', true);
  // Support skipping timestamps at the query level, see gh-6980  if (!timestamps || updates == null) {    return currentUpdate;  }
  const skipCreatedAt = timestamps != null && timestamps.createdAt === false;  const skipUpdatedAt = timestamps != null && timestamps.updatedAt === false;
  if (overwrite) {    if (currentUpdate && currentUpdate.$set) {      currentUpdate = currentUpdate.$set;      updates.$set = {};      _updates = updates.$set;    }    if (!skipUpdatedAt && updatedAt && !currentUpdate[updatedAt]) {      _updates[updatedAt] = now;    }    if (!skipCreatedAt && createdAt && !currentUpdate[createdAt]) {      _updates[createdAt] = now;    }    return updates;  }  currentUpdate = currentUpdate || {};
  if (Array.isArray(updates)) {    // Update with aggregation pipeline    updates.push({ $set: { [updatedAt]: now } });
    return updates;  }
  updates.$set = updates.$set || {};  if (!skipUpdatedAt && updatedAt &&      (!currentUpdate.$currentDate || !currentUpdate.$currentDate[updatedAt])) {    let timestampSet = false;    if (updatedAt.indexOf('.') !== -1) {      const pieces = updatedAt.split('.');      for (let i = 1; i < pieces.length; ++i) {        const remnant = pieces.slice(-i).join('.');        const start = pieces.slice(0, -i).join('.');        if (currentUpdate[start] != null) {          currentUpdate[start][remnant] = now;          timestampSet = true;          break;        } else if (currentUpdate.$set && currentUpdate.$set[start]) {          currentUpdate.$set[start][remnant] = now;          timestampSet = true;          break;        }      }    }
    if (!timestampSet) {      updates.$set[updatedAt] = now;    }
    if (updates.hasOwnProperty(updatedAt)) {      delete updates[updatedAt];    }  }
  if (!skipCreatedAt && createdAt) {    if (currentUpdate[createdAt]) {      delete currentUpdate[createdAt];    }    if (currentUpdate.$set && currentUpdate.$set[createdAt]) {      delete currentUpdate.$set[createdAt];    }    let timestampSet = false;    if (createdAt.indexOf('.') !== -1) {      const pieces = createdAt.split('.');      for (let i = 1; i < pieces.length; ++i) {        const remnant = pieces.slice(-i).join('.');        const start = pieces.slice(0, -i).join('.');        if (currentUpdate[start] != null) {          currentUpdate[start][remnant] = now;          timestampSet = true;          break;        } else if (currentUpdate.$set && currentUpdate.$set[start]) {          currentUpdate.$set[start][remnant] = now;          timestampSet = true;          break;        }      }    }
    if (!timestampSet) {      updates.$setOnInsert = updates.$setOnInsert || {};      updates.$setOnInsert[createdAt] = now;    }  }
  if (Object.keys(updates.$set).length === 0) {    delete updates.$set;  }  return updates;}