fix: add custom expo plugin in expo sample app

Author: isekovanic

examples/ExpoMessaging/app.json

@@ -62,7 +62,8 @@
         {
           "microphonePermission": "$(PRODUCT_NAME) would like to use your microphone for voice recording."
         }
-      ]
+      ],
+      "./plugins/keyboardInsetMainActivityListener.js"
     ]
   }
 }

examples/ExpoMessaging/plugins/keyboardInsetMainActivityListener.js

@@ -0,0 +1,78 @@
+const { withMainActivity, createRunOncePlugin } = require('@expo/config-plugins');
+
+const requiredImports = [
+  'import android.os.Build',
+  'import android.os.Bundle',
+  'import android.view.View',
+  'import androidx.core.view.ViewCompat',
+  'import androidx.core.view.WindowInsetsCompat',
+  'import androidx.core.view.updatePadding',
+];
+
+const customInsetHandler = `
+    if (Build.VERSION.SDK_INT >= 35) {
+        val rootView = findViewById<View>(android.R.id.content)
+
+        ViewCompat.setOnApplyWindowInsetsListener(rootView) { view, insets ->
+            val bars = insets.getInsets(
+                WindowInsetsCompat.Type.systemBars()
+                        or WindowInsetsCompat.Type.displayCutout()
+                        or WindowInsetsCompat.Type.ime()
+            )
+            rootView.updatePadding(
+                left = bars.left,
+                top = bars.top,
+                right = bars.right,
+                bottom = bars.bottom
+            )
+            WindowInsetsCompat.CONSUMED
+        }
+    }
+`;
+
+const withCustomMainActivity = (config) => {
+  return withMainActivity(config, (mod) => {
+    if (mod.modResults.language !== 'kt') {
+      throw new Error('MainActivity must be written in Kotlin for this plugin.');
+    }
+
+    let contents = mod.modResults.contents;
+
+    // Add missing imports
+    const packageLineMatch = contents.match(/^package\s+[^\n]+\n/);
+    if (packageLineMatch) {
+      const packageLine = packageLineMatch[0];
+      for (const imp of requiredImports) {
+        if (!contents.includes(imp)) {
+          contents = contents.replace(packageLine, packageLine + imp + '\n');
+        }
+      }
+    }
+
+    // Inject inside onCreate(), right after super.onCreate(null)
+    // Match the full onCreate method
+    const onCreateMethodRegex = /override fun onCreate\(savedInstanceState: Bundle\?\) \{([\s\S]*?)^\s*}/m;
+
+    // If the method exists and doesn't already contain a custom ViewCompat.setOnApplyWindowInsetsListener, inject it
+    if (onCreateMethodRegex.test(contents) && !contents.includes('ViewCompat.setOnApplyWindowInsetsListener')) {
+      contents = contents.replace(onCreateMethodRegex, (match, body) => {
+        // Inject after super.onCreate(null)
+        const modifiedBody = body.replace(
+          /super\.onCreate\(null\);?/,
+          (superLine) => `${superLine}\n${customInsetHandler}`
+        );
+
+        return `override fun onCreate(savedInstanceState: Bundle?) {\n${modifiedBody}\n}`;
+      });
+    }
+
+    mod.modResults.contents = contents;
+    return mod;
+  });
+};
+
+module.exports = createRunOncePlugin(
+  withCustomMainActivity,
+  'keyboard-inset-main-activity-listener-plugin',
+  '0.0.1'
+);