NodeBB/NodeBB

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src/database/mongo/sets.js

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'use strict';

module.exports = function (module) {
    const _ = require('lodash');
    const helpers = require('./helpers');

    module.setAdd = async function (key, value) {
        if (!Array.isArray(value)) {
            value = [value];
        }
        if (!value.length) {
            return;
        }
        value = value.map(v => helpers.valueToString(v));

        await module.client.collection('objects').updateOne({
            _key: key,
        }, {
            $addToSet: {
                members: {
                    $each: value,
                },
            },
        }, {
            upsert: true,
        });
    };

    module.setsAdd = async function (keys, value) {
        if (!Array.isArray(keys) || !keys.length) {
            return;
        }

        if (!Array.isArray(value)) {
            value = [value];
        }

        value = value.map(v => helpers.valueToString(v));

        const bulk = module.client.collection('objects').initializeUnorderedBulkOp();

        for (let i = 0; i < keys.length; i += 1) {
            bulk.find({ _key: keys[i] }).upsert().updateOne({
                $addToSet: {
                    members: {
                        $each: value,
                    },
                },
            });
        }
        try {
            await bulk.execute();
        } catch (err) {
            if (err && err.message.startsWith('E11000 duplicate key error')) {
                return await module.setsAdd(keys, value);
            }
            throw err;
        }
    };

    module.setRemove = async function (key, value) {
        if (!Array.isArray(value)) {
            value = [value];
        }

        value = value.map(v => helpers.valueToString(v));

        await module.client.collection('objects').updateMany({
            _key: Array.isArray(key) ? { $in: key } : key,
        }, {
            $pullAll: { members: value },
        });
    };

    module.setsRemove = async function (keys, value) {
        if (!Array.isArray(keys) || !keys.length) {
            return;
        }
        value = helpers.valueToString(value);

        await module.client.collection('objects').updateMany({
            _key: { $in: keys },
        }, {
            $pull: { members: value },
        });
    };

    module.isSetMember = async function (key, value) {
        if (!key) {
            return false;
        }
        value = helpers.valueToString(value);

        const item = await module.client.collection('objects').findOne({
            _key: key, members: value,
        }, {
            projection: { _id: 0, members: 0 },
        });
        return item !== null && item !== undefined;
    };

    module.isSetMembers = async function (key, values) {
        if (!key || !Array.isArray(values) || !values.length) {
            return [];
        }
        values = values.map(v => helpers.valueToString(v));

        const result = await module.client.collection('objects').findOne({
            _key: key,
        }, {
            projection: { _id: 0, _key: 0 },
        });
        const membersSet = new Set(result && Array.isArray(result.members) ? result.members : []);
        return values.map(v => membersSet.has(v));
    };

    module.isMemberOfSets = async function (sets, value) {
        if (!Array.isArray(sets) || !sets.length) {
            return [];
        }
        value = helpers.valueToString(value);

        const result = await module.client.collection('objects').find({
            _key: { $in: sets }, members: value,
        }, {
            projection: { _id: 0, members: 0 },
        }).toArray();

        const map = {};
        result.forEach((item) => {
            map[item._key] = true;
        });

        return sets.map(set => !!map[set]);
    };

    module.getSetMembers = async function (key) {
        if (!key) {
            return [];
        }

        const data = await module.client.collection('objects').findOne({
            _key: key,
        }, {
            projection: { _id: 0, _key: 0 },
        });
        return data ? data.members : [];
    };

    module.getSetsMembers = async function (keys) {
        if (!Array.isArray(keys) || !keys.length) {
            return [];
        }
        const data = await module.client.collection('objects').find({
            _key: { $in: keys },
        }, {
            projection: { _id: 0 },
        }).toArray();

        const sets = {};
        data.forEach((set) => {
            sets[set._key] = set.members || [];
        });

        return keys.map(k => sets[k] || []);
    };

    module.setCount = async function (key) {
        if (!key) {
            return 0;
        }
        const data = await module.client.collection('objects').aggregate([
            { $match: { _key: key } },
            { $project: { _id: 0, count: { $size: '$members' } } },
        ]).toArray();
        return Array.isArray(data) && data.length ? data[0].count : 0;
    };

    module.setsCount = async function (keys) {
        const data = await module.client.collection('objects').aggregate([
            { $match: { _key: { $in: keys } } },
            { $project: { _id: 0, _key: 1, count: { $size: '$members' } } },
        ]).toArray();
        const map = _.keyBy(data, '_key');
        return keys.map(key => (map.hasOwnProperty(key) ? map[key].count : 0));
    };

    module.setRemoveRandom = async function (key) {
        const data = await module.client.collection('objects').findOne({ _key: key });
        if (!data) {
            return;
        }

        const randomIndex = Math.floor(Math.random() * data.members.length);
        const value = data.members[randomIndex];
        await module.setRemove(data._key, value);
        return value;
    };
};