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- // @flow
-
- import * as React from 'react';
- import {Linking, Platform, StyleSheet, View} from "react-native";
- import {Button, Text, withTheme} from 'react-native-paper';
- import {RNCamera} from 'react-native-camera';
- import {BarcodeMask} from '@nartc/react-native-barcode-mask';
- import URLHandler from "../../utils/URLHandler";
- import AlertDialog from "../../components/Dialogs/AlertDialog";
- import i18n from 'i18n-js';
- import CustomTabBar from "../../components/Tabbar/CustomTabBar";
- import LoadingConfirmDialog from "../../components/Dialogs/LoadingConfirmDialog";
- import {PERMISSIONS, request, RESULTS} from 'react-native-permissions';
- import {MASCOT_STYLE} from "../../components/Mascot/Mascot";
- import MascotPopup from "../../components/Mascot/MascotPopup";
-
- type Props = {};
- type State = {
- hasPermission: boolean,
- scanned: boolean,
- dialogVisible: boolean,
- mascotDialogVisible: boolean,
- dialogTitle: string,
- dialogMessage: string,
- loading: boolean,
- };
-
- class ScannerScreen extends React.Component<Props, State> {
-
- state = {
- hasPermission: false,
- scanned: false,
- mascotDialogVisible: false,
- dialogVisible: false,
- dialogTitle: "",
- dialogMessage: "",
- loading: false,
- };
-
- constructor() {
- super();
- }
-
- componentDidMount() {
- this.requestPermissions();
- }
-
- /**
- * Requests permission to use the camera
- */
- requestPermissions = () => {
- if (Platform.OS === 'android')
- request(PERMISSIONS.ANDROID.CAMERA).then(this.updatePermissionStatus)
- else
- request(PERMISSIONS.IOS.CAMERA).then(this.updatePermissionStatus)
- };
-
- /**
- * Updates the state permission status
- *
- * @param result
- */
- updatePermissionStatus = (result) => this.setState({hasPermission: result === RESULTS.GRANTED});
-
- /**
- * Opens scanned link if it is a valid app link or shows and error dialog
- *
- * @param type The barcode type
- * @param data The scanned value
- */
- handleCodeScanned = ({type, data}) => {
- if (!URLHandler.isUrlValid(data))
- this.showErrorDialog();
- else {
- this.showOpeningDialog();
- Linking.openURL(data);
- }
- };
-
- /**
- * Gets a view asking user for permission to use the camera
- *
- * @returns {*}
- */
- getPermissionScreen() {
- return <View style={{marginLeft: 10, marginRight: 10}}>
- <Text>{i18n.t("screens.scanner.permissions.error")}</Text>
- <Button
- icon="camera"
- mode="contained"
- onPress={this.requestPermissions}
- style={{
- marginTop: 10,
- marginLeft: 'auto',
- marginRight: 'auto',
- }}
- >
- {i18n.t("screens.scanner.permissions.button")}
- </Button>
- </View>
- }
-
- /**
- * Shows a dialog indicating how to use the scanner
- */
- showHelpDialog = () => {
- this.setState({
- mascotDialogVisible: true,
- scanned: true,
- });
- };
-
- /**
- * Shows a loading dialog
- */
- showOpeningDialog = () => {
- this.setState({
- loading: true,
- scanned: true,
- });
- };
-
- /**
- * Shows a dialog indicating the user the scanned code was invalid
- */
- showErrorDialog() {
- this.setState({
- dialogVisible: true,
- scanned: true,
- });
- }
-
- /**
- * Hide any dialog
- */
- onDialogDismiss = () => this.setState({
- dialogVisible: false,
- scanned: false,
- });
-
- onMascotDialogDismiss = () => this.setState({
- mascotDialogVisible: false,
- scanned: false,
- });
-
- /**
- * Gets a view with the scanner.
- * This scanner uses the back camera, can only scan qr codes and has a square mask on the center.
- * The mask is only for design purposes as a code is scanned as soon as it enters the camera view
- *
- * @returns {*}
- */
- getScanner() {
- return (
- <RNCamera
- onBarCodeRead={this.state.scanned ? undefined : this.handleCodeScanned}
- type={RNCamera.Constants.Type.back}
- barCodeScannerSettings={{
- barCodeTypes: [RNCamera.Constants.BarCodeType.qr],
- }}
- style={StyleSheet.absoluteFill}
- captureAudio={false}
- >
- <BarcodeMask
- backgroundColor={"#000"}
- maskOpacity={0.5}
- animatedLineThickness={1}
- animationDuration={1000}
- width={250}
- height={250}
- />
- </RNCamera>
- );
- }
-
- render() {
- return (
- <View style={{
- ...styles.container,
- marginBottom: CustomTabBar.TAB_BAR_HEIGHT
- }}>
- {this.state.hasPermission
- ? this.getScanner()
- : this.getPermissionScreen()
- }
- <Button
- icon="information"
- mode="contained"
- onPress={this.showHelpDialog}
- style={styles.button}
- >
- {i18n.t("screens.scanner.help.button")}
- </Button>
- <MascotPopup
- visible={this.state.mascotDialogVisible}
- title={i18n.t("screens.scanner.mascotDialog.title")}
- message={i18n.t("screens.scanner.mascotDialog.message")}
- icon={"camera-iris"}
- buttons={{
- action: null,
- cancel: {
- message: i18n.t("screens.scanner.mascotDialog.button"),
- icon: "check",
- onPress: this.onMascotDialogDismiss,
- }
- }}
- emotion={MASCOT_STYLE.NORMAL}
- />
- <AlertDialog
- visible={this.state.dialogVisible}
- onDismiss={this.onDialogDismiss}
- title={i18n.t("screens.scanner.error.title")}
- message={i18n.t("screens.scanner.error.message")}
- />
- <LoadingConfirmDialog
- visible={this.state.loading}
- titleLoading={i18n.t("general.loading")}
- startLoading={true}
- />
- </View>
- );
- }
- }
-
- const styles = StyleSheet.create({
- container: {
- flex: 1,
- justifyContent: 'center',
- },
- button: {
- position: 'absolute',
- bottom: 20,
- width: '80%',
- left: '10%'
- },
- });
-
- export default withTheme(ScannerScreen);
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