@evocount/react-code-scanner
Version:
A react module for scanning codes like barcodes and QR codes.
166 lines • 9.08 kB
JavaScript
;
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var __generator = (this && this.__generator) || function (thisArg, body) {
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case 0: case 1: t = op; break;
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var __importDefault = (this && this.__importDefault) || function (mod) {
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Object.defineProperty(exports, "__esModule", { value: true });
var react_1 = __importDefault(require("react"));
var react_2 = require("react");
var react_3 = require("react");
var react_4 = require("react");
var signal_1 = __importDefault(require("@evocount/signal"));
var styled_components_1 = __importDefault(require("styled-components"));
var Wrapper = styled_components_1.default.div(templateObject_1 || (templateObject_1 = __makeTemplateObject(["\n\tposition: relative;\n"], ["\n\tposition: relative;\n"])));
var StyledVideo = styled_components_1.default.video(templateObject_2 || (templateObject_2 = __makeTemplateObject(["\n\twidth: 100%;\n"], ["\n\twidth: 100%;\n"])));
var AnimationWrapper = styled_components_1.default.div(templateObject_3 || (templateObject_3 = __makeTemplateObject(["\n\tposition: absolute;\n\ttop: 0;\n\tleft: 0;\n\twidth: 100%;\n\theight: 100%;\n"], ["\n\tposition: absolute;\n\ttop: 0;\n\tleft: 0;\n\twidth: 100%;\n\theight: 100%;\n"])));
exports.default = (function (_a) {
var on_scan = _a.on_scan, on_error = _a.on_error, facing_mode = _a.facing_mode, children = _a.children, LoadingAnimation = _a.LoadingAnimation, props = __rest(_a, ["on_scan", "on_error", "facing_mode", "children", "LoadingAnimation"]);
var _b = react_2.useState(false), loaded = _b[0], set_loaded = _b[1];
var _c = react_2.useState(true), loading_animation = _c[0], set_loading_animation = _c[1];
var preview = react_4.useRef(null);
react_3.useEffect(function () {
if (preview.current === null) {
return;
}
var cancel = new signal_1.default;
(function () { return __awaiter(void 0, void 0, void 0, function () {
var stream, Scanner, scanner, exception_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 7, , 8]);
if (preview.current === null) {
return [2 /*return*/];
}
return [4 /*yield*/, navigator.mediaDevices.getUserMedia({
video: { facingMode: facing_mode || "environment" }
})];
case 1:
stream = _a.sent();
if (!!loaded) return [3 /*break*/, 3];
preview.current.srcObject = stream;
preview.current.load();
return [4 /*yield*/, preview.current.play()];
case 2:
_a.sent();
set_loaded(true);
set_loading_animation(false);
_a.label = 3;
case 3:
if (!on_scan) return [3 /*break*/, 6];
return [4 /*yield*/, Promise.resolve().then(function () { return __importStar(require("./scanner")); })];
case 4:
Scanner = _a.sent();
scanner = new Scanner.default(200);
return [4 /*yield*/, scanner.scan(cancel, stream, on_scan)];
case 5:
_a.sent();
_a.label = 6;
case 6:
stream.getTracks().forEach(function (track) { return track.stop(); });
return [3 /*break*/, 8];
case 7:
exception_1 = _a.sent();
if (on_error) {
on_error(exception_1);
}
else {
console.error(exception_1);
}
return [3 /*break*/, 8];
case 8: return [2 /*return*/];
}
});
}); })();
return function () {
cancel.notify();
};
}, [preview]);
return react_1.default.createElement(Wrapper, __assign({}, props),
react_1.default.createElement(StyledVideo, { muted: true, playsInline: true, autoPlay: true, ref: preview }, children),
LoadingAnimation && loading_animation &&
react_1.default.createElement(AnimationWrapper, null,
react_1.default.createElement(LoadingAnimation, null)));
});
var templateObject_1, templateObject_2, templateObject_3;
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