mrz4nodejs/index.js

Node.js bindings to Dynamsoft MRZ C/C++ SDK.

if (process.platform === 'win32') {
    console.log('Windows');
}
else if (process.platform === 'linux') {
    console.log('Linux');
}
else if (process.platform === 'darwin') {
    console.log('macOS');
}
else {
    console.log('Unknown Operating System');
}
var mrzscanner = require('./build/Release/mrzscanner');
var fs = require('fs');
var path = require('path');
var MrzScanner = /** @class */ (function () {
    function MrzScanner() {
        this.obj = mrzscanner.MrzScanner();
    }
    MrzScanner.initLicense = function (license) {
        return mrzscanner.initLicense(license);
    };
    MrzScanner.getVersionNumber = function () {
        return mrzscanner.getVersionNumber();
    };
    MrzScanner.prototype.loadModel = function (modelDir) {
        var modelPath = path.join(modelDir, 'MRZ.json');
        var json = fs.readFileSync(modelPath);
        var config = JSON.parse(json);
        if (config['CharacterModelArray'][0]['DirectoryPath'] === 'model') {
            config['CharacterModelArray'][0]['DirectoryPath'] = path.join(modelDir, 'model');
            // fs.writeFileSync(modelPath, JSON.stringify(config));
        }
        return this.obj.loadModel(JSON.stringify(config));
    };
    MrzScanner.prototype.decodeFileAsync = function (filePath) {
        var _this = this;
        return new Promise(function (resolve, reject) {
            _this.obj.decodeFileAsync(filePath, function (err, result) {
                setTimeout(function () {
                    if (err) {
                        reject(err);
                    }
                    else {
                        resolve(result);
                    }
                }, 0);
            });
        });
    };
    MrzScanner.prototype.decodeBufferAsync = function (buffer, width, height, stride) {
        var _this = this;
        return new Promise(function (resolve, reject) {
            _this.obj.decodeBufferAsync(buffer, width, height, stride, function (err, result) {
                setTimeout(function () {
                    if (err) {
                        reject(err);
                    }
                    else {
                        resolve(result);
                    }
                }, 0);
            });
        });
    };
    MrzScanner.prototype.parseTwoLines = function (line1, line2) {
        var mrzInfo = {};
        var type = line1.substring(0, 1);
        if (!(/[I|P|V]/.test(type)))
            return false;
        if (type === 'P') {
            mrzInfo.type = 'PASSPORT (TD-3)';
        }
        else if (type === 'V') {
            if (line1.length === 44) {
                mrzInfo.type = 'VISA (MRV-A)';
            }
            else if (line1.length === 36) {
                mrzInfo.type = 'VISA (MRV-B)';
            }
        }
        else if (type === 'I') {
            mrzInfo.type = 'ID CARD (TD-2)';
        }
        // Get issuing State infomation
        var nation = line1.substring(2, 5);
        if (/[0-9]/.test(nation))
            return false;
        if (nation[nation.length - 1] === '<') {
            nation = nation.substr(0, 2);
        }
        mrzInfo.nationality = nation;
        // Get surname information
        line1 = line1.substring(5);
        var pos = line1.indexOf("<<");
        var surName = line1.substring(0, pos);
        if (/[0-9]/.test(surName))
            return false;
        surName = surName.replace(/\</g, " ");
        mrzInfo.surname = surName;
        // Get givenname information
        var givenName = line1.substring(surName.length + 2);
        if (/[0-9]/.test(givenName))
            return false;
        givenName = givenName.replace(/\</g, " ");
        givenName = givenName.trim();
        mrzInfo.givenname = givenName;
        // Get passport number information
        var passportNumber;
        passportNumber = line2.substring(0, 9);
        passportNumber = passportNumber.replace(/\</g, " ");
        mrzInfo.passportnumber = passportNumber;
        // Get Nationality information
        var issueCountry = line2.substr(10, 3);
        if (/[0-9]/.test(issueCountry))
            return false;
        if (issueCountry[issueCountry.length - 1] == '<') {
            issueCountry = issueCountry.substr(0, 2);
        }
        mrzInfo.issuecountry = issueCountry;
        // Get date of birth information
        var birth = line2.substr(13, 6);
        var date = new Date();
        var currentYear = date.getFullYear();
        if (parseInt(birth.substr(0, 2)) > (currentYear % 100)) {
            birth = "19" + birth;
        }
        else {
            birth = "20" + birth;
        }
        birth = birth.slice(0, 4) + "-" + birth.slice(4, 6) + "-" + birth.slice(6);
        if (/[A-Za-z]/.test(birth))
            return false;
        mrzInfo.birth = birth;
        // Get gender information
        var gender = line2[20];
        if (!(/[M|F|x|<]/.test(gender)))
            return false;
        mrzInfo.gender = gender;
        // Get date of expiry information
        var expiry = line2.substr(21, 6);
        if (/[A-Za-z]/.test(expiry))
            return false;
        if (parseInt(expiry.substring(0, 2)) >= 60) {
            expiry = '19' + expiry;
        }
        else {
            expiry = '20' + expiry;
        }
        expiry = expiry.slice(0, 4) + "-" + expiry.slice(4, 6) + "-" + expiry.slice(6);
        mrzInfo.expiry = expiry;
        return mrzInfo;
    };
    ;
    MrzScanner.prototype.parseThreeLines = function (line1, line2, line3) {
        var mrzInfo = {};
        var type = line1.substring(0, 1);
        if (!(/[I|P|V]/.test(type)))
            return false;
        mrzInfo.type = 'ID CARD (TD-1)';
        // Get nationality infomation
        var nation = line2.substring(15, 18);
        if (/[0-9]/.test(nation))
            return false;
        nation = nation.replace(/\</g, '');
        mrzInfo.nationality = nation;
        // Get surname information
        var pos = line3.indexOf("<<");
        var surName = line3.substring(0, pos);
        if (/[0-9]/.test(surName))
            return false;
        surName = surName.replace(/\</g, " ");
        mrzInfo.surname = surName;
        // Get givenname information
        var givenName = line3.substring(surName.length + 2);
        if (/[0-9]/.test(givenName))
            return false;
        givenName = givenName.replace(/\</g, " ");
        givenName = givenName.trim();
        mrzInfo.givenname = givenName;
        // Get passport number information
        var passportNumber;
        passportNumber = line1.substring(5, 14);
        passportNumber = passportNumber.replace(/\</g, " ");
        mrzInfo.passportnumber = passportNumber;
        // Get issuing country or organization information
        var issueCountry = line1.substring(2, 5);
        if (/[0-9]/.test(issueCountry))
            return false;
        issueCountry = issueCountry.replace(/\</g, '');
        mrzInfo.issuecountry = issueCountry;
        // Get date of birth information
        var birth = line2.substring(0, 6);
        if (/[A-Za-z]/.test(birth))
            return false;
        var date = new Date();
        var currentYear = date.getFullYear();
        if (parseInt(birth.substr(0, 2)) > (currentYear % 100)) {
            birth = "19" + birth;
        }
        else {
            birth = "20" + birth;
        }
        birth = birth.slice(0, 4) + "-" + birth.slice(4, 6) + "-" + birth.slice(6);
        mrzInfo.birth = birth;
        // Get gender information
        var gender = line2[7];
        if (!(/[M|F|X|<]/.test(gender)))
            return false;
        gender = gender.replace('<', 'X');
        mrzInfo.gender = gender;
        // Get date of expiry information
        var expiry = "20" + line2.substring(8, 14);
        if (/[A-Za-z]/.test(expiry))
            return false;
        expiry = expiry.slice(0, 4) + "-" + expiry.slice(4, 6) + "-" + expiry.slice(6);
        mrzInfo.expiry = expiry;
        return mrzInfo;
    };
    return MrzScanner;
}());
module.exports = MrzScanner;