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const translate = require('@google-cloud/translate')();


exports.translate = (req, res) => {

    const from = req.query.from
    const to = req.query.to
    const text = req.query.text

    if (!from || !to || !text)
    {
        return res.status(200).send('')
    }

    const options = {from: from, to: to }

    

    translate.translate(text, options, (e, translation) => {
        if (!e)
        {
            const translated = translation
            res.status(200).send(translated)            
        }
        else
        {   
            if (req.method == 'OPTIONS')
            {
                res.status(204).send('');
            }
        
            res.status(200)
                .header('Access-Control-Allow-Origin', '*')
                .header('Access-Control-Allow-Headers', 'Content-Type')
                .send(translated);
        }
        
    })

    

    /*
    if (!req.body.from || !req.body.to || !req.body.text)
    {
        return
    }

    // TODO if 'to' or 'from' are not in a valid list of arrays, return
    // ie, user cant translated to 'es33'

    const options = {
        from: req.body.from,
        to: req.body.to
    }

    const text = req.body.text
    
    
    translate.translate(text, options, (e, translation) => {
        if (!e)
        {
            const translated = translation
            res.status(200).send(translated)            
        }
        else
        {   
            if (req.method == 'OPTIONS')
            {
                res.status(204).send('');
            }
        
            res.status(200)
                .header('Access-Control-Allow-Origin', '*')
                .header('Access-Control-Allow-Headers', 'Content-Type')
                .send(translated);
        }
        
    })
    */

}