arrest/dist/pipeline.js

OpenAPI v3 compliant REST framework for Node.js, with support for MongoDB and JSON-Schema

import { Operation } from './operation.js';
import { toCSV } from './util.js';
export class PipelineOperation extends Operation {
    async createJob(req, res) {
        const out = {
            req,
            res,
            query: {},
            opts: {},
            feat: {
                filter: {
                    fields: true,
                    data: true,
                },
            },
        };
        if (req.query.format === 'csv' && req.query.csv_fields?.length) {
            const opts = {
                fields: req.query.csv_fields,
                ...(req.query.csv_options || {}),
            };
            if (req.query.csv_names?.length === opts.fields.length) {
                opts.fields = opts.fields.reduce((o, i, idx) => {
                    o[i] = req.query.csv_names[idx];
                    return o;
                }, {});
            }
            out.feat.format = {
                ...opts,
                type: 'csv',
            };
        }
        return out;
    }
    async prepareQuery(job) {
        return job;
    }
    async prepareDoc(job) {
        return job;
    }
    async prepareOpts(job) {
        return job;
    }
    async redactResult(job) {
        if (job.req.ability && job.data && typeof job.data === 'object' && (job.feat?.filter?.fields || job.feat?.filter?.data)) {
            job.data = this.checkAbility(job.req.ability, job.data, job.feat.filter.fields, job.feat.filter.data);
        }
        return job;
    }
    async processResult(job) {
        if (job.data) {
            if (job.feat?.format?.type === 'csv' && Array.isArray(job.data)) {
                job.data = toCSV(job.data, job.feat.format);
                job.res.setHeader('content-type', 'text/csv');
                if (job.feat.format.filename) {
                    job.res.setHeader('content-disposition', `attachment; filename=\"${job.feat.format.filename}\"`);
                }
                job.res.send(job.data);
            }
            else {
                job.res.jsonp(job.data);
            }
        }
        else {
            job.res.end();
        }
        return job;
    }
    async handler(req, res) {
        try {
            const job = await this.createJob(req, res);
            await this.prepareQuery(job);
            await this.prepareDoc(job);
            await this.prepareOpts(job);
            req.logger.debug(this.info.operationId, 'query', JSON.stringify(job.query, null, 2));
            req.logger.debug(this.info.operationId, 'doc', JSON.stringify(job.doc, null, 2));
            req.logger.debug(this.info.operationId, 'opts', JSON.stringify(job.opts, null, 2));
            await this.runOperation(job);
            await this.redactResult(job);
            await this.processResult(job);
        }
        catch (err) {
            this.api.handleError(err, req, res);
        }
    }
}
export class SimplePipelineOperation extends PipelineOperation {
    constructor(customRunner, resource, path, method, id) {
        super(resource, path, method, id);
        this.customRunner = customRunner;
    }
    runOperation(job) {
        return this.customRunner(job);
    }
}
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