Calculation/app/service/stage_att.js

'use strict';

/**
 *
 *  附件
 * @author Ellisran
 * @date 2019/1/11
 * @version
 */

const archiver = require('archiver');
const path = require('path');
const fs = require('fs');
module.exports = app => {
    class StageAtt extends app.BaseService {
        /**
         * 构造函数
         *
         * @param {Object} ctx - egg全局变量
         * @return {void}
         */
        constructor(ctx) {
            super(ctx);
            this.tableName = 'stage_attachment';
        }

        /**
         * 添加附件
         * @param {Object} postData - 表单信息
         * @param {Object} fileData - 文件信息
         * @param {int} uid - 上传者id
         * @return {void}
         */
        async save(postData, fileData, uid) {
            const data = {
                lid: postData.lid,
                uid,
                remark: '',
            };
            Object.assign(data, fileData);
            const result = await this.db.insert(this.tableName, data);
            return result;
        }

        /**
         * 添加附件
         * @param {Object} postData - 表单信息
         * @param {Object} fileData - 文件信息
         * @param {int} uid - 上传者id
         * @return {void}
         */
        async updateByID(postData, fileData) {
            delete postData.size;
            const data = {};
            Object.assign(data, fileData);
            Object.assign(data, postData);
            const result = await this.db.update(this.tableName, data);
            return result.affectedRows === 1;
        }

        /**
         * 获取所有附件
         * @param {int} tid - 标段id
         * @param {int} sid - 当前期数
         * @return {void}
         */
        async getDataByTenderIdAndStageId(tid, sid) {
            const sql = 'SELECT att.id, att.lid, att.uid, att.filename, att.fileext, att.filesize, att.extra_upload, att.remark, att.in_time,' +
                ' pa.name as `username`, leg.name as `lname`, leg.code as `code`, leg.ledger_id as `ledger_id`, leg.b_code as `b_code`' +
                ' FROM ?? AS att,?? AS pa,?? AS leg' +
                ' WHERE leg.id = att.lid AND pa.id = att.uid AND att.tid = ? AND att.sid = ? ORDER BY att.id DESC';
            const sqlParam = [this.tableName, this.ctx.service.projectAccount.tableName, this.ctx.service.ledger.tableName, tid, sid];
            return await this.db.query(sql, sqlParam);
        }

        /**
         * 获取单个附件
         * @param {int} tid - 标段id
         * @param {int} sid - 当前期数
         * @return {void}
         */
        async getDataByFid(id) {
            const { ctx } = this;
            const sql = 'SELECT att.id, att.lid, att.uid, att.filepath, att.filename, att.extra_upload, att.fileext, att.filesize, att.remark, att.in_time,' +
                ' pa.name as `username`, leg.name as `lname`, leg.code as `code`, leg.ledger_id as `ledger_id`,leg.b_code as `b_code`' +
                ' FROM ?? AS att,?? AS pa,?? AS leg' +
                ' WHERE leg.id = att.lid AND pa.id = att.uid AND att.id = ? ORDER BY att.in_time DESC';
            const sqlParam = [this.tableName, this.ctx.service.projectAccount.tableName, this.ctx.service.ledger.tableName, id];
            const result = await this.db.queryOne(sql, sqlParam);
            if (!ctx.helper.canPreview(result.fileext)) result.filepath = `/tender/${ctx.tender.id}/measure/stage/${ctx.params.order}/download/file/${result.id}`;
            else result.filepath = result.filepath.replace(/^app|\/app/, '');
            return result;
        }

        /**
         * 将文件压缩成zip，并返回zip文件的路径
         * @param {array} fileIds - 文件数组id
         * @param {string} zipPath - 压缩文件存储路径
         * @return {string} 压缩后的zip文件路径
         */
        async compressedFile(fileIds, zipPath) {
            this.initSqlBuilder();
            this.sqlBuilder.setAndWhere('id', {
                value: fileIds,
                operate: 'in',
            });
            const [sql, sqlParam] = this.sqlBuilder.build(this.tableName);
            const files = await this.db.query(sql, sqlParam);
            // const paths = files.map(item => {
            //     return { name: item.filename + item.fileext, path: item.filepath }
            // })
            return new Promise((resolve, reject) => {
                // 每次开一个新的archiver
                const ziparchiver = archiver('zip');
                const outputPath = fs.createWriteStream(path.resolve(this.app.baseDir, zipPath));

                outputPath.on('error', err => {
                    reject(err);
                });
                ziparchiver.pipe(outputPath);
                files.forEach(item => {
                    ziparchiver.file(item.filepath, { name: item.filename + item.fileext });
                });

                // 存档警告
                ziparchiver.on('warning', function(err) {
                    if (err.code === 'ENOENT') {
                        console.warn('stat故障和其他非阻塞错误');
                    }
                    reject(err);

                });

                // 存档出错
                ziparchiver.on('error', function(err) {
                    console.log(err);
                    reject(err);
                });

                ziparchiver.finalize();
                outputPath.on('close', () => {
                    resolve(ziparchiver.pointer());
                });
            });
        }
    }
    return StageAtt;
};