idcard-reader/dist/lib/index.js

通过二代身份证机具读取二代身份证信息

import { composite, formatBaseData, initialDataBase, initialIDData, parseCompositeOpts, parseDeviceOpts, testWrite, validateDllFile, } from '@waiting/idcard-reader-base';
import { error, info } from '@waiting/log';
import { createFileAsync, fileExists, isFileExists, join, normalize, } from '@waiting/shared-core';
import * as ffi from 'ffi-napi';
import { combineLatest, iif, of, } from 'rxjs';
import { catchError, map, mergeMap, shareReplay, tap, timeout, } from 'rxjs/operators';
import { dllFuncs, dllImgFuncs, } from './config';
import { disconnectDevice, findDeviceList, readDataBase } from './device';
export async function init(options) {
    const deviceOpts = parseDeviceOpts(options);
    const compositeOpts = parseCompositeOpts(options);
    const { debug } = deviceOpts;
    if (debug) {
        info(compositeOpts);
        info(deviceOpts);
    }
    await validateDllFile(deviceOpts.dllTxt);
    // 不允许 未指定照片解码dll
    if (compositeOpts.useComposite) {
        if (!deviceOpts.dllImage) {
            throw new Error('Value of dellImage empty');
        }
        else if (!await isFileExists(deviceOpts.dllImage)) {
            throw new Error('File not exists: ' + deviceOpts.dllImage);
        }
    }
    await testWrite(deviceOpts.imgSaveDir);
    const apib = ffi.Library(deviceOpts.dllTxt, dllFuncs);
    const devices = findDeviceList(deviceOpts, compositeOpts, apib);
    if (devices && devices.length) {
        debug && console.info('Found devices:', devices);
        return devices;
    }
    else {
        throw new Error('未找到读卡设备');
    }
}
/** Read card data */
export function read(device) {
    if (device.openPort) {
        disconnectDevice(device);
        // 读卡获取原始buffer数据
        const raw$ = readDataBase(device).pipe(shareReplay(1));
        // 生成 base 数据
        const base$ = raw$.pipe(tap((raw) => {
            if (raw.err) {
                throw new Error('读卡失败：code:' + raw.code.toString());
            }
        }), map((raw) => {
            const base = pickFields(raw && raw.text.byteLength ? raw.text.toString('ucs2') : '');
            return base;
        }), shareReplay(1));
        // 解码头像
        const imagePath$ = raw$.pipe(mergeMap(raw => retriveAvatar(raw.image, device)), mergeMap((imagePath) => {
            return fileExists(imagePath).pipe(tap((path) => {
                if (!path) {
                    error(`解码头像文件失败 path: "${imagePath}"`);
                }
            }));
        }));
        // 合成图片
        const imgsPath$ = iif(() => !device.compositeOpts.useComposite, of({
            compositePath: '',
            imagePath: '',
        }), combineLatest(base$, imagePath$).pipe(mergeMap(([base, imagePath]) => {
            return composite(imagePath, base, device.compositeOpts).pipe(map((compositePath) => {
                return {
                    compositePath,
                    imagePath,
                };
            }));
        })));
        const ret$ = combineLatest(base$, imgsPath$).pipe(tap(() => {
            disconnectDevice(device);
        }), map(([base, imgsPath]) => {
            const ret = {
                ...initialIDData,
                ...imgsPath,
                base,
            };
            return ret;
        }), timeout(20000), catchError((err) => {
            disconnectDevice(device);
            throw err;
        }));
        return ret$.toPromise();
    }
    else {
        throw new Error('设备端口未指定');
    }
}
/** pick fields from origin text */
export function pickFields(text) {
    const ret = { ...initialDataBase };
    if (!text || !text.length) {
        return ret;
    }
    ret.name = text.slice(0, 15).trim();
    ret.gender = +text.slice(15, 16);
    ret.nation = text.slice(16, 18); // 民族
    ret.birth = text.slice(18, 26); // 16
    ret.address = text.slice(26, 61).trim(); // 70
    ret.idc = text.slice(61, 79); // 身份证号
    ret.regorg = text.slice(79, 94).trim(); // 签发机关
    ret.startdate = text.slice(94, 102);
    ret.enddate = text.slice(102, 110);
    return formatBaseData(ret);
}
/**
 * 解码读取到的头像 Buffer，返回生成的图片路径
 */
export function retriveAvatar(image, device) {
    const opts = device.deviceOpts;
    device.apii = ffi.Library(opts.dllImage, dllImgFuncs);
    return decodeImage(device, image);
}
async function decodeImage(device, buf) {
    // console.log(buf.slice(0, 10))
    const name = join(device.deviceOpts.imgSaveDir, _genImageName('idcrimage_'));
    const tmpname = name + '.wlt';
    if (!device.apii) {
        return '';
    }
    await createFileAsync(tmpname, buf);
    // covert wlt file to bmp
    const res = device.apii.GetBmp(tmpname, device.useUsb ? 2 : 1);
    device.deviceOpts.debug && info(['resolve image res:', res]);
    if (res === 1) {
        const ipath = normalize(name + '.bmp');
        return ipath;
    }
    else {
        return '';
    }
}
function _genImageName(prefix) {
    const dd = new Date();
    const mon = dd.getMonth();
    const day = dd.getDate();
    const rstr = Math.random().toString().slice(-8);
    return `${prefix}${dd.getFullYear()}${mon > 9 ? mon : '0' + mon.toString()}${day > 9 ? day : '0' + day.toString()}_${rstr}`;
}