Add an intent filter for receiving PGN's from other apps

android/app/src/main/AndroidManifest.xml

@@ -33,6 +33,12 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
 
+            <intent-filter>
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="text/plain" />
+            </intent-filter>
+
             <intent-filter>
                 <action android:name="android.intent.action.VIEW" />
                 <category android:name="android.intent.category.DEFAULT" />

android/app/src/main/java/org/lichess/mobileapp/LiIntent.java

@@ -0,0 +1,22 @@
+package org.lichess.mobileapp;
+
+import android.content.Intent;
+
+import com.getcapacitor.JSObject;
+import com.getcapacitor.NativePlugin;
+import com.getcapacitor.Plugin;
+
+@NativePlugin()
+public class LiIntent extends Plugin {
+    @Override
+    protected void handleOnNewIntent(Intent intent) {
+        String action = intent.getAction();
+        String text = intent.getStringExtra(Intent.EXTRA_TEXT);
+
+        if (Intent.ACTION_SEND.equals(action) && text != null) {
+            JSObject obj = new JSObject();
+            obj.put("pgn", text);
+            notifyListeners("importPGN", obj, true);
+        }
+    }
+}

android/app/src/main/java/org/lichess/mobileapp/MainActivity.java

@@ -9,15 +9,13 @@
 import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
-import android.os.PatternMatcher;
 import android.util.Log;
 import android.webkit.WebView;
 
 import com.getcapacitor.BridgeActivity;
 import com.getcapacitor.Dialogs;
 import com.getcapacitor.Plugin;
 import com.getcapacitor.community.keepawake.KeepAwake;
-import com.getcapacitor.plugin.Storage;
 
 import org.lichess.plugin.SoundEffect;
 import org.lichess.mobileapp.stockfish.Stockfish;
@@ -41,6 +39,7 @@ public void onCreate(Bundle savedInstanceState) {
     // Initializes the Bridge
     this.init(savedInstanceState, new ArrayList<Class<? extends Plugin>>() {{
       // Additional plugins you've installed go here
+      add(LiIntent.class);
       add(LiToast.class);
       add(LiShare.class);
       add(LiBuildConfig.class);

src/app.ts

@@ -14,7 +14,9 @@ import push from './push'
 import router from './router'
 import socket from './socket'
 import sound from './sound'
+import * as utils from './utils'
 import { isForeground, setForeground, setBackground } from './utils/appMode'
+import { ImportEvent } from './ui/importer/importer'
 
 let firstConnection = true
 
@@ -88,6 +90,13 @@ export default function appInit(
 
   Plugins.App.addListener('backButton', router.backbutton)
 
+  Plugins.LiIntent.addListener('importPGN', (e: ImportEvent) => {
+    const params: Record<string, string> = {
+      pgn: e.pgn,
+    }
+    router.set(`/importer?${utils.serializeQueryParameters(params)}`)
+  })
+
   window.addEventListener('resize', debounce(onResize), false)
 }
 

src/ui/importer/ImporterCtrl.ts

@@ -9,12 +9,15 @@ import { OnlineGameData } from '../../lichess/interfaces/game'
 export interface IImporterCtrl {
   importGame(pgn: string): void
   importing: Prop<boolean>
+  pgn: Prop<string | null>
 }
 
 export default function ImporterCtrl(): IImporterCtrl {
 
   const importing = prop(false)
 
+  const pgn = prop<string | null>(null)
+
   function submitOnline(pgn: string, analyse: boolean): Promise<OnlineGameData> {
     const data: {[i: string]: string } = { pgn }
     if (analyse) data.analyse = '1'
@@ -45,6 +48,7 @@ export default function ImporterCtrl(): IImporterCtrl {
         handleXhrError(err)
       })
     },
-    importing
+    importing,
+    pgn
   }
 }

src/ui/importer/importer.ts

@@ -13,10 +13,15 @@ interface State {
   ctrl: IImporterCtrl
 }
 
-const ImporterScreen: Mithril.Component<Record<string, never>, State> = {
-  oninit() {
+export interface ImportEvent {
+  pgn: string
+}
+
+const ImporterScreen: Mithril.Component<ImportEvent, State> = {
+  oninit(vnode) {
     socket.createDefault()
     this.ctrl = ImporterCtrl()
+    this.ctrl.pgn(vnode.attrs.pgn)
   },
 
   oncreate: helper.viewFadeIn,
@@ -35,13 +40,17 @@ function renderBody(ctrl: IImporterCtrl) {
     h('form', {
       onsubmit: (e: Event) => {
         e.preventDefault()
-        const target = e.target as HTMLFormElement
-        const pgn: string = (target[0] as HTMLInputElement).value
-        if (pgn) ctrl.importGame(pgn)
+        if (ctrl.pgn()) ctrl.importGame(ctrl.pgn()!)
       }
     }, [
       h('label', i18n('pasteThePgnStringHere') + ' :'),
-      h('textarea.pgnImport'),
+      h('textarea.pgnImport', {
+        value: ctrl.pgn(),
+        onchange(e: Event) {
+          const target = e.target as HTMLTextAreaElement
+          ctrl.pgn(target.value)
+        }
+      }),
       formWidgets.renderCheckbox(i18n('requestAComputerAnalysis'), 'analyse', settings.importer.analyse),
       h('button.fatButton', ctrl.importing() ?
         h('div.fa.fa-hourglass-half') : i18n('importGame'))