react-native-expo-braintree/lib/module/plugin/withExpoBraintree.android.js

React native and expo wrapper around braintree sdk fro android and ios

import { AndroidConfig, withAndroidManifest, withMainActivity } from '@expo/config-plugins';
import { addImports } from '@expo/config-plugins/build/android/codeMod';
import { mergeContents } from '@expo/config-plugins/build/utils/generateCode';
const {
  getMainActivityOrThrow
} = AndroidConfig.Manifest;
export const withExpoBraintreeAndroid = (expoConfig, {
  host,
  pathPrefix
}) => {
  let newConfig = withAndroidManifest(expoConfig, config => {
    config.modResults = addPaypalAppLinks(config.modResults, host, pathPrefix);
    return config;
  });
  newConfig = withMainActivity(expoConfig, config => {
    const {
      modResults
    } = config;
    const {
      language
    } = modResults;
    const withImports = addImports(modResults.contents, ['com.expobraintree.ExpoBraintreeModule'], language === 'java');
    const withInit = mergeContents({
      src: withImports,
      comment: '    // add BraintreeModule import',
      tag: 'braintree-module-init',
      offset: 1,
      anchor: /(?<=^.*super\.onCreate.*$)/m,
      newSrc: `     ExpoBraintreeModule.init()${language === 'java' ? ';' : ''}`
    });
    return {
      ...config,
      modResults: {
        ...modResults,
        contents: withInit.contents
      }
    };
  });
  return newConfig;
};

// Add new intent filter for App Links
// <activity>
//   ...
//   <intent-filter android:autoVerify="true">
//     <action android:name="android.intent.action.VIEW" />
//     <category android:name="android.intent.category.DEFAULT" />
//     <category android:name="android.intent.category.BROWSABLE" />
//        <data android:scheme="http" />
//        <data android:scheme="https" />
//        <data android:host="myownpersonaldomain.com" />
//        <data android:pathPrefix="/braintree-payments"/>
//   </intent-filter>
// </activity>;

export const addPaypalAppLinks = (modResults, host, pathPrefix) => {
  const mainActivity = getMainActivityOrThrow(modResults);
  const intentFilters = mainActivity['intent-filter'];
  if (!host) {
    throw Error('No Host provided for withExpoBraintree.android addPaypalAppLinks');
  }

  // Check if the intent filter already exists
  if (hasIntentFilter(intentFilters, host, pathPrefix)) {
    console.warn('withExpoBraintreeAndroid: AndroidManifest not require any changes');
    return modResults;
  }
  const newIntentFilter = {
    action: [{
      $: {
        'android:name': 'android.intent.action.VIEW'
      }
    }],
    category: [{
      $: {
        'android:name': 'android.intent.category.DEFAULT'
      }
    }, {
      $: {
        'android:name': 'android.intent.category.BROWSABLE'
      }
    }],
    data: [{
      $: {
        'android:scheme': 'http'
      }
    }, {
      $: {
        'android:scheme': 'https'
      }
    }, {
      $: {
        'android:host': host
      }
    }],
    $: {
      'android:autoVerify': 'true'
    }
  };
  // If there is pathPrefix then we add that
  if (pathPrefix) {
    newIntentFilter.data?.push({
      $: {
        'android:pathPrefix': pathPrefix
      }
    });
  }

  // Add the intent-filter to the main activity
  mainActivity['intent-filter'] = [...(mainActivity['intent-filter'] || []), newIntentFilter];
  return modResults;
};

/**
 * Check if an intent-filter with the same data already exists
 * @param {object} intentFilters - The AndroidManifest intent filters
 * @param {string} host - The host to check
 * @param {string} pathPrefix - The pathPrefix to check
 * @returns {boolean} - Returns true if a matching intent filter is found
 */
function hasIntentFilter(intentFilters, host, pathPrefix) {
  return intentFilters?.some(filter => {
    const hasAutoVerify = filter.$ && filter.$['android:autoVerify'] === 'true';
    const hasViewAction = filter.action?.some(action => action.$['android:name'] === 'android.intent.action.VIEW');
    const hasDefaultCategory = filter.category?.some(category => category.$['android:name'] === 'android.intent.category.DEFAULT');
    const hasBrowsableCategory = filter.category?.some(category => category.$['android:name'] === 'android.intent.category.BROWSABLE');
    const hasHttpScheme = filter.data?.some(data => data.$['android:scheme'] === 'http');
    const hasHttpsScheme = filter.data?.some(data => data.$['android:scheme'] === 'https');
    const hasMatchingHost = filter.data?.some(data => data.$['android:host'] === host);
    const hasMatchingPathPrefix = filter.data?.some(data => data.$['android:pathPrefix'] === pathPrefix);

    // Check all conditions to ensure it matches the intent filter we want to add
    return hasAutoVerify && hasViewAction && hasDefaultCategory && hasBrowsableCategory && hasHttpScheme && hasHttpsScheme && hasMatchingHost && (hasMatchingPathPrefix || !pathPrefix);
  });
}
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