dbmedialab/reader-critics

//
// LESERKRITIKK v2 (aka Reader Critics)
// Copyright (C) 2017 DB Medialab/Aller Media AS, Oslo, Norway
// https://github.com/dbmedialab/reader-critics/
//
// This program is free software: you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free Software
// Foundation, either version 3 of the License, or (at your option) any later
// version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along with
// this program. If not, see <http://www.gnu.org/licenses/>.

import {ArticleModel} from 'app/db/models';

export default function (search?: string) : Promise <number> {
    const match = {
        feedbacks: {$not: {$eq: 0}},
        'itemField.order.type': 1,
        'itemField.order.item': 1,
    };
    if (search) {
        match['$or'] = [
            {'itemField.text' : new RegExp(`${search}`, 'i')},
            {'url' : new RegExp(`^(?:http(?:s)?\\:\\/\\/)?(?:www\\.)?(?:.*\\..*\\/)${search}`, 'i')},
            // The RegExp above is looking for search string match in URL AFTER the domain part
            // Example: for string 'dagbladet' it would find only the article with second link below:
            // - 'http://www.dagbladet.no/articles/65342134'
            // - 'http://avisa.tld/articles/dagbladet-never-die/63232123'
        ];
    }

    return ArticleModel.aggregate([
            {
                $lookup: {
                    from: 'feedbacks',
                    localField: '_id',
                    foreignField: 'article',
                    as: 'feedbacks',
                },
            },
            {
                $project: {
                    ID: '$_id',
                    itemField: '$items',
                    feedbacks: {
                        $size: '$feedbacks',
                    },
                },
            },
            {
                $unwind: '$itemField',
            },
            {
                $match: match,
            },
        ])
        .then((d: any) => d.length);
}