Method random

packages/hydrooj/src/model/problem.ts:376–382

(domainId: string, query: Filter<ProblemDoc>)

    }

    static async random(domainId: string, query: Filter<ProblemDoc>) {
        const pcount = await document.count(domainId, document.TYPE_PROBLEM, query);
        if (!pcount) return null;
        const pdoc = await document.getMulti(domainId, document.TYPE_PROBLEM, query)
            .skip(Math.floor(Math.random() * pcount)).limit(1).toArray();
        return pdoc[0].pid || pdoc[0].docId;
    }

    static async getList(
        domainId: string, pids: number[], canViewHidden: number | boolean = false,