API: Search Products

Even though our example file only has one product in it, we still need to provide a search API so that our products can be aggregated into searches for packages matching some criteria.

We'll put our search at /products/search and implement the basic search parameters:

Because our products don't have service dates on them, we'll just support filtering by price.

We'll also implement sorting and pagination so our results show up in the right place.

app.get('/products/search', (req, res) => {

    const offset = req.query.offset || 0,
          limit  = req.query.limit || 10;

    const results = products.filter((p) => {
        let match = true;

        let { price } = req.query;

        // Apply price filter
        if (price) {
            if (price.currency) match &= p.pricing.price.currency === price.currency;
            if (price.min) match &= p.pricing.price.value >= price.min;
            if (price.max) match &= p.pricing.price.value <= price.max;
        }

        return match;
    }).sort((a, b) => {
        // Sort Results
        const { sort } = req.query;
        
        switch (sort) {
            case 'id':
            case 'name':
                return a[sort] >= b[sort];
            case 'price':
                return a.pricing.price.value >= b.pricing.price.value;
            default:
                a
                return a.name >= b.name;
        }
    }).slice(offset, limit);

    res.status(200).json(results);
});

Just a Demo

Remember, this is just a simple demo of how to build a product provider on top of a static data set. In a real application you would likely use a database to provide the filtering, sorting and paging functionality.