timestamp-mongoose/index.js

Mongoose plugin that automatically adds createdAt and updatedAt date properties

const defaults = require('defaults');

function timestampsPlugin(schema, options) {
    var updatedAt = 'updatedAt';
    var createdAt = 'createdAt';
    var updatedAtOpts = Date;
    var createdAtOpts = Date;
    var dataObj = {};

    if (typeof options === 'object') {
        if (typeof options.updatedAt === 'string') {
            updatedAt = options.updatedAt;
        } else if (typeof options.updatedAt === 'object') {
            updatedAtOpts = defaults(options.updatedAt, {
                name: updatedAt,
                type: Date
            });
            updatedAt = updatedAtOpts.name;
        }

        if (typeof options.createdAt === 'string') {
            createdAt = options.createdAt;
        } else if (typeof options.createdAt === 'object') {
            createdAtOpts = defaults(options.createdAt, {
                name: createdAt,
                type: Date
            });
            createdAt = createdAtOpts.name;
        }
    }

    if (!schema.path(updatedAt) && updatedAt) {
        dataObj[updatedAt] = updatedAtOpts;
    }

    if (schema.path(createdAt)) {
        if (!schema.path(updatedAt) && updatedAt) {
            schema.add(dataObj);
        }
        if (schema.virtual(createdAt).get) {
            schema.virtual(createdAt)
                .get(function () {
                    if (this["_" + createdAt]) return this["_" + createdAt];
                    return this["_" + createdAt] = this._id.getTimestamp();
                });
        }
        schema.pre('save', function (next) {
            if (this.isNew) {
                var newDate = new Date;
                if (createdAt) this[createdAt] = newDate;
                if (updatedAt) this[updatedAt] = newDate;
            } else if (this.isModified() && updatedAt) {
                this[updatedAt] = new Date;
            }
            next();
        });

    } else {
        if (createdAt) {
            dataObj[createdAt] = createdAtOpts;
        }
        if (dataObj[createdAt] || dataObj[updatedAt]) {
            schema.add(dataObj);
        }
        schema.pre('save', function (next) {
            if (!this[createdAt]) {
                var newDate = new Date;
                if (createdAt) this[createdAt] = newDate;
                if (updatedAt) this[updatedAt] = newDate;
            } else if (this.isModified() && updatedAt) {
                this[updatedAt] = new Date;
            }
            next();
        });
    }

    schema.pre('findOneAndUpdate', function (next) {
        if (this.op === 'findOneAndUpdate') {
            var newDate = new Date;
            this._update = this._update || {};
            if (createdAt) {
                if (this._update[createdAt]) {
                    delete this._update[createdAt];
                }

                this._update['$setOnInsert'] = this._update['$setOnInsert'] || {};
                this._update['$setOnInsert'][createdAt] = newDate;
            }
            if (updatedAt) {
                this._update[updatedAt] = newDate;
            }
        }
        next();
    });

    schema.pre('update', function (next) {
        if (this.op === 'update') {
            var newDate = new Date;
            this._update = this._update || {};
            if (createdAt) {
                if (this._update[createdAt]) {
                    delete this._update[createdAt];
                }

                this._update['$setOnInsert'] = this._update['$setOnInsert'] || {};
                this._update['$setOnInsert'][createdAt] = newDate;
            }
            if (updatedAt) {
                this._update[updatedAt] = newDate;
            }
        }
        next();
    });

    schema.pre('updateOne', function (next) {
        if (this.op === 'updateOne') {
            var newDate = new Date;
            this._update = this._update || {};
            if (createdAt) {
                if (this._update[createdAt]) {
                    delete this._update[createdAt];
                }

                this._update['$setOnInsert'] = this._update['$setOnInsert'] || {};
                this._update['$setOnInsert'][createdAt] = newDate;
            }
            if (updatedAt) {
                this._update[updatedAt] = newDate;
            }
        }
        next();
    });

    schema.pre('updateMany', function (next) {
        if (this.op === 'updateMany') {
            var newDate = new Date;
            this._update = this._update || {};
            if (createdAt) {
                if (this._update[createdAt]) {
                    delete this._update[createdAt];
                }

                this._update['$setOnInsert'] = this._update['$setOnInsert'] || {};
                this._update['$setOnInsert'][createdAt] = newDate;
            }
            if (updatedAt) {
                this._update[updatedAt] = newDate;
            }
        }
        next();
    });

    if (!schema.methods.hasOwnProperty('touch') && updatedAt)
        schema.methods.touch = function (callback) {
            this[updatedAt] = new Date;
            this.save(callback);
        }

}

module.exports = timestampsPlugin;