salix/services/loopback/common/methods/item/clone.js

let UserError = require('../../helpers').UserError;

module.exports = Self => {
    Self.remoteMethod('clone', {
        description: 'clone item',
        accessType: 'WRITE',
        accepts: [{
            arg: 'id',
            type: 'number',
            required: true,
            description: 'origin itemId',
            http: {source: 'path'}
        }],
        returns: {
            arg: 'id',
            description: 'new cloned itemId'
        },
        http: {
            path: `/:id/clone`,
            verb: 'post'
        }
    });

    Self.clone = async itemId => {
        let filter = {
            where: {
                id: itemId
            },
            include: [
                {relation: 'tags', scope: {order: 'priority ASC', include: {relation: 'tag'}}}
            ]
        };

        try {
            let origin = await Self.findOne(filter);
            let copy = JSON.parse(JSON.stringify(origin));

            delete copy.id;
            delete copy.itemTag;
            delete copy.description;

            let newItem = await Self.create(copy);
            let promises = [];

            let createBotanical = `INSERT INTO vn.itemBotanical (itemFk, botanical, genusFk, specieFk)
                            SELECT ?, botanical, genusFk, specieFk 
                            FROM vn.itemBotanical ib WHERE itemFk = ?`;
            promises.push(Self.rawSql(createBotanical, [newItem.id, origin.id]));

            let createTags = `INSERT INTO vn.itemTag(itemFk, tagFk, value, priority)
                        SELECT ?, i.tagFk, i.value,i.priority 
                        FROM vn.itemTag i WHERE i.itemFk = ?
                        ON DUPLICATE KEY UPDATE value = i.value, priority = i.priority`;
            promises.push(Self.rawSql(createTags, [newItem.id, origin.id]));

            let createTax = `REPLACE INTO vn.itemTaxCountry (itemFk, countryFk, taxClassFk)
                                    SELECT ?, countryFk, taxClassFk 
                                    FROM vn.itemTaxCountry WHERE itemFk = ?`;
            promises.push(Self.rawSql(createTax, [newItem.id, origin.id]));

            await Promise.all(promises);
            return newItem.id;
        } catch (err) {
            throw new UserError(err);
        }
    };
};