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enrollment.js
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enrollment.js
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/**
* The MIT License (MIT)
*
* Copyright (c) 2019-2023 Toha <tohenk@yahoo.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
const dp = require('..');
const MAX_FMD = 4;
const fmds = [];
let xstatus = null;
dp.init();
console.log('Readers:', dp.getReaders());
console.log(`\nAttention!!! You need to enroll ${MAX_FMD} different fingers next.`);
function enroll() {
let stage = 1;
let stages = dp.getFeaturesLen();
console.log('\n=== Fingerprint enrollment ===\n');
dp.startAcquire(true, (status, data) => {
switch (status) {
case 'disconnected':
if (xstatus != status) {
console.log('Please connect fingerprint reader...');
}
break;
case 'connected':
if (fmds.length > 0) {
console.log('Swipe another finger to enroll...');
} else {
console.log('Swipe your finger to enroll...');
}
break;
case 'error':
console.log('Error occurred, please try again...');
break;
case 'complete':
console.log('Finger acquired (%d/%d)', stage, stages);
stage++;
break;
case 'enrolled':
if (data) {
fmds.push(data);
}
dp.stopAcquire(() => {
if (fmds.length < MAX_FMD) {
console.log('Enroll another finger...');
enroll();
} else {
verify();
}
});
break;
}
xstatus = status;
});
}
function verify() {
console.log('\n=== Fingerprint identification ===\n');
dp.startAcquire((status, data) => {
switch (status) {
case 'disconnected':
if (xstatus != status) {
console.log('Please connect fingerprint reader...');
}
break;
case 'connected':
console.log('Swipe your finger to verify...');
break;
case 'error':
break;
case 'complete':
dp.identify(data, fmds)
.then(idx => {
if (idx >= 0) {
console.log('Finger matched at %d', idx);
dp.stopAcquire(() => {
console.log('It is done, exiting...');
dp.exit();
});
} else {
console.log('Finger not matched, try again');
verify();
}
})
.catch(err => {
console.log(err);
});
break;
}
xstatus = status;
});
}
enroll();