[RN] Keep device screen on while in a conference

android/app/build.gradle

     maven { url 'https://maven.fabric.io/public' }
 }
 dependencies {
+    compile project(':react-native-keep-awake')
     compile project(':react-native-vector-icons')
     compile project(':react-native-webrtc')
     compile fileTree(dir: 'libs', include: ['*.jar'])

android/app/src/main/java/org/jitsi/meet/MainApplication.java

         @Override
         protected List<ReactPackage> getPackages() {
             return Arrays.<ReactPackage>asList(
+                new com.corbt.keepawake.KCKeepAwakePackage(),
                 new com.facebook.react.shell.MainReactPackage(),
                 new com.oblador.vectoricons.VectorIconsPackage(),
                 new com.oney.WebRTCModule.WebRTCModulePackage()

android/settings.gradle

 rootProject.name = 'jitsi-meet-react'
 
 include ':app'
+include ':react-native-keep-awake'
+project(':react-native-keep-awake').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-keep-awake/android')
 include ':react-native-vector-icons'
 project(':react-native-vector-icons').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-vector-icons/android')
 include ':react-native-webrtc'

ios/jitsi-meet-react.xcodeproj/project.pbxproj

 		2602576C1D0A7703001E3363 /* jitsi.ttf in Resources */ = {isa = PBXBuildFile; fileRef = 2602576B1D0A7703001E3363 /* jitsi.ttf */; };
 		3847F11906B4479A9162628F /* libRNVectorIcons.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 821D8ABD506944B4BDBB069B /* libRNVectorIcons.a */; };
 		832341BD1AAA6AB300B99B32 /* libRCTText.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 832341B51AAA6A8300B99B32 /* libRCTText.a */; };
+		901FE90FA5744B5B94DCDC41 /* libKCKeepAwake.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 0EA8C046B2BF46279796F07D /* libKCKeepAwake.a */; };
 		B30EF2311DC0ED7C00690F45 /* WebRTC.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = B30EF2301DC0ED7C00690F45 /* WebRTC.framework */; };
 		B30EF2331DC0EEA500690F45 /* WebRTC.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = B30EF2301DC0ED7C00690F45 /* WebRTC.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		B3A9D0251E0481E10009343D /* POSIX.m in Sources */ = {isa = PBXBuildFile; fileRef = B3A9D0241E0481E10009343D /* POSIX.m */; };
 			remoteGlobalIDString = 832C81801AAF6DEF007FA2F7;
 			remoteInfo = RCTVibration;
 		};
+		0B8752851E26E54A004C5CAB /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 5B09C20C78C74A548AAAC1FA /* KCKeepAwake.xcodeproj */;
+			proxyType = 2;
+			remoteGlobalIDString = 134814201AA4EA6300B7C361;
+			remoteInfo = KCKeepAwake;
+		};
 		139105C01AF99BAD00B5F7CC /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = 139105B61AF99BAD00B5F7CC /* RCTSettings.xcodeproj */;
 		00C302BB1ABCB91800DB3ED1 /* RCTImage.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTImage.xcodeproj; path = "../node_modules/react-native/Libraries/Image/RCTImage.xcodeproj"; sourceTree = "<group>"; };
 		00C302D31ABCB9D200DB3ED1 /* RCTNetwork.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTNetwork.xcodeproj; path = "../node_modules/react-native/Libraries/Network/RCTNetwork.xcodeproj"; sourceTree = "<group>"; };
 		00C302DF1ABCB9EE00DB3ED1 /* RCTVibration.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTVibration.xcodeproj; path = "../node_modules/react-native/Libraries/Vibration/RCTVibration.xcodeproj"; sourceTree = "<group>"; };
+		0EA8C046B2BF46279796F07D /* libKCKeepAwake.a */ = {isa = PBXFileReference; explicitFileType = undefined; fileEncoding = 9; includeInIndex = 0; lastKnownFileType = archive.ar; path = libKCKeepAwake.a; sourceTree = "<group>"; };
 		139105B61AF99BAD00B5F7CC /* RCTSettings.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTSettings.xcodeproj; path = "../node_modules/react-native/Libraries/Settings/RCTSettings.xcodeproj"; sourceTree = "<group>"; };
 		139FDEE61B06529A00C62182 /* RCTWebSocket.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTWebSocket.xcodeproj; path = "../node_modules/react-native/Libraries/WebSocket/RCTWebSocket.xcodeproj"; sourceTree = "<group>"; };
 		13B07F961A680F5B00A75B9A /* jitsi-meet-react.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "jitsi-meet-react.app"; sourceTree = BUILT_PRODUCTS_DIR; };
 		146833FF1AC3E56700842450 /* React.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = React.xcodeproj; path = "../node_modules/react-native/React/React.xcodeproj"; sourceTree = "<group>"; };
 		22418656B14845609F953A42 /* RNVectorIcons.xcodeproj */ = {isa = PBXFileReference; explicitFileType = undefined; fileEncoding = 9; includeInIndex = 0; lastKnownFileType = "wrapper.pb-project"; name = RNVectorIcons.xcodeproj; path = "../node_modules/react-native-vector-icons/RNVectorIcons.xcodeproj"; sourceTree = "<group>"; };
 		2602576B1D0A7703001E3363 /* jitsi.ttf */ = {isa = PBXFileReference; lastKnownFileType = file; name = jitsi.ttf; path = ../android/app/src/main/assets/fonts/jitsi.ttf; sourceTree = "<group>"; };
+		5B09C20C78C74A548AAAC1FA /* KCKeepAwake.xcodeproj */ = {isa = PBXFileReference; explicitFileType = undefined; fileEncoding = 9; includeInIndex = 0; lastKnownFileType = "wrapper.pb-project"; name = KCKeepAwake.xcodeproj; path = "../node_modules/react-native-keep-awake/ios/KCKeepAwake.xcodeproj"; sourceTree = "<group>"; };
 		78C398B01ACF4ADC00677621 /* RCTLinking.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTLinking.xcodeproj; path = "../node_modules/react-native/Libraries/LinkingIOS/RCTLinking.xcodeproj"; sourceTree = "<group>"; };
 		821D8ABD506944B4BDBB069B /* libRNVectorIcons.a */ = {isa = PBXFileReference; explicitFileType = undefined; fileEncoding = 9; includeInIndex = 0; lastKnownFileType = archive.ar; path = libRNVectorIcons.a; sourceTree = "<group>"; };
 		832341B01AAA6A8300B99B32 /* RCTText.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTText.xcodeproj; path = "../node_modules/react-native/Libraries/Text/RCTText.xcodeproj"; sourceTree = "<group>"; };
 				BFC745141CB829B300673F38 /* libRCTWebRTC.a in Frameworks */,
 				139FDEF61B0652A700C62182 /* libRCTWebSocket.a in Frameworks */,
 				3847F11906B4479A9162628F /* libRNVectorIcons.a in Frameworks */,
+				901FE90FA5744B5B94DCDC41 /* libKCKeepAwake.a in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 			name = Products;
 			sourceTree = "<group>";
 		};
+		0B8752821E26E54A004C5CAB /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				0B8752861E26E54A004C5CAB /* libKCKeepAwake.a */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
 		139105B71AF99BAD00B5F7CC /* Products */ = {
 			isa = PBXGroup;
 			children = (
 				139FDEE61B06529A00C62182 /* RCTWebSocket.xcodeproj */,
 				146833FF1AC3E56700842450 /* React.xcodeproj */,
 				22418656B14845609F953A42 /* RNVectorIcons.xcodeproj */,
+				5B09C20C78C74A548AAAC1FA /* KCKeepAwake.xcodeproj */,
 			);
 			name = Libraries;
 			sourceTree = "<group>";
 			productRefGroup = 83CBBA001A601CBA00E9B192 /* Products */;
 			projectDirPath = "";
 			projectReferences = (
+				{
+					ProductGroup = 0B8752821E26E54A004C5CAB /* Products */;
+					ProjectRef = 5B09C20C78C74A548AAAC1FA /* KCKeepAwake.xcodeproj */;
+				},
 				{
 					ProductGroup = 00C302A81ABCB8CE00DB3ED1 /* Products */;
 					ProjectRef = 00C302A71ABCB8CE00DB3ED1 /* RCTActionSheet.xcodeproj */;
 			remoteRef = 00C302E31ABCB9EE00DB3ED1 /* PBXContainerItemProxy */;
 			sourceTree = BUILT_PRODUCTS_DIR;
 		};
+		0B8752861E26E54A004C5CAB /* libKCKeepAwake.a */ = {
+			isa = PBXReferenceProxy;
+			fileType = archive.ar;
+			path = libKCKeepAwake.a;
+			remoteRef = 0B8752851E26E54A004C5CAB /* PBXContainerItemProxy */;
+			sourceTree = BUILT_PRODUCTS_DIR;
+		};
 		139105C11AF99BAD00B5F7CC /* libRCTSettings.a */ = {
 			isa = PBXReferenceProxy;
 			fileType = archive.ar;
 					/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include,
 					"$(SRCROOT)/../node_modules/react-native/React/**",
 					"$(SRCROOT)/../node_modules/react-native/Libraries/LinkingIOS/**",
+					"$(SRCROOT)/../node_modules/react-native-keep-awake/ios",
 					"$(SRCROOT)/../node_modules/react-native-vector-icons/RNVectorIconsManager",
 				);
 				INFOPLIST_FILE = app/Info.plist;
 					/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include,
 					"$(SRCROOT)/../node_modules/react-native/React/**",
 					"$(SRCROOT)/../node_modules/react-native/Libraries/LinkingIOS/**",
+					"$(SRCROOT)/../node_modules/react-native-keep-awake/ios",
 					"$(SRCROOT)/../node_modules/react-native-vector-icons/RNVectorIconsManager",
 				);
 				INFOPLIST_FILE = app/Info.plist;
 					"$(inherited)",
 					/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include,
 					"$(SRCROOT)/../node_modules/react-native/React/**",
+					"$(SRCROOT)/../node_modules/react-native-keep-awake/ios",
 					"$(SRCROOT)/../node_modules/react-native-vector-icons/RNVectorIconsManager",
 				);
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 					"$(inherited)",
 					/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include,
 					"$(SRCROOT)/../node_modules/react-native/React/**",
+					"$(SRCROOT)/../node_modules/react-native-keep-awake/ios",
 					"$(SRCROOT)/../node_modules/react-native-vector-icons/RNVectorIconsManager",
 				);
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;

package.json

     "react": "15.4.2",
     "react-dom": "15.4.2",
     "react-native": "0.39.2",
+    "react-native-keep-awake": "^1.0.7",
     "react-native-prompt": "^1.0.0",
     "react-native-vector-icons": "^3.0.0",
     "react-native-webrtc": "jitsi/react-native-webrtc",

react/features/app/components/App.native.js

 import { Linking } from 'react-native';
 
 import { Platform } from '../../base/react';
+import '../../wake-lock';
 
 import { AbstractApp } from './AbstractApp';
 

react/features/wake-lock/index.js

+import './middleware';

react/features/wake-lock/middleware.js

+import KeepAwake from 'react-native-keep-awake';
+
+import {
+    CONFERENCE_FAILED,
+    CONFERENCE_JOINED,
+    CONFERENCE_LEFT
+} from '../base/conference';
+import { MiddlewareRegistry } from '../base/redux';
+
+/**
+ * Middleware that captures conference actions and activates or deactivates the
+ * wake lock accordingly. If the wake lock is active, it will prevent the screen
+ * from dimming.
+ *
+ * @param {Store} store - Redux store.
+ * @returns {Function}
+ */
+MiddlewareRegistry.register(store => next => action => {
+    switch (action.type) {
+    case CONFERENCE_JOINED: {
+        const state = store.getState()['features/base/conference'];
+
+        // TODO(saghul): Implement audio-only mode.
+        if (!state.audioOnly) {
+            setWakeLock(true);
+        }
+        break;
+    }
+
+    case CONFERENCE_FAILED:
+    case CONFERENCE_LEFT:
+        setWakeLock(false);
+        break;
+    }
+
+    return next(action);
+});
+
+/**
+ * Activates/deactivates the wake lock. If the wake lock is active, it will
+ * prevent the screen from dimming.
+ *
+ * @param {boolean} wakeLock - True to active the wake lock or false to
+ * deactivate it.
+ * @returns {void}
+ */
+function setWakeLock(wakeLock) {
+    if (wakeLock) {
+        KeepAwake.activate();
+    } else {
+        KeepAwake.deactivate();
+    }
+}