fix: initiate OAuth using Custom Tabs on Android, closes #361 (#788)

apps/readest-app/src-tauri/gen/android/app/src/main/AndroidManifest.xml

@@ -19,6 +19,12 @@
             android:label="@string/main_activity_title"
             android:name=".MainActivity"
             android:exported="true">
+	    <intent-filter android:label="oauth">
+		<action android:name="android.intent.action.VIEW" />
+		<category android:name="android.intent.category.DEFAULT" />
+		<category android:name="android.intent.category.BROWSABLE" />
+		<data android:scheme="readest" android:host="auth-callback" />
+	    </intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />

apps/readest-app/src-tauri/gen/android/app/src/main/java/com/bilingify/readest/MainActivity.kt

@@ -2,10 +2,14 @@ package com.bilingify.readest
 
 import android.os.Build
 import android.os.Bundle
+import android.content.Intent
+import android.net.Uri
 import android.view.View
 import android.view.WindowInsets
 import android.view.WindowInsetsController
 import androidx.activity.enableEdgeToEdge
+import app.tauri.plugin.JSObject
+import com.readest.native_bridge.NativeBridgePlugin
 
 class MainActivity : TauriActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -15,6 +19,20 @@ class MainActivity : TauriActivity() {
         hideSystemUI()
     }
 
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+
+        val uri = intent.data ?: return
+        if (uri.scheme == "readest" && uri.host == "auth-callback") {
+            val result = JSObject().apply {
+                put("redirectUrl", uri.toString())
+            }
+
+            NativeBridgePlugin.pendingInvoke?.resolve(result)
+            NativeBridgePlugin.pendingInvoke = null
+        }
+  }
+
     private fun hideSystemUI() {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
             window.decorView.windowInsetsController?.let { controller ->

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/android/build.gradle.kts

@@ -33,9 +33,9 @@ android {
 }
 
 dependencies {
-
     implementation("androidx.core:core-ktx:1.9.0")
     implementation("androidx.appcompat:appcompat:1.6.0")
+    implementation("androidx.browser:browser:1.8.0")
     implementation("com.google.android.material:material:1.7.0")
     testImplementation("junit:junit:4.13.2")
     androidTestImplementation("androidx.test.ext:junit:1.1.5")

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/android/src/main/java/NativeBridge.kt

@@ -3,7 +3,4 @@ package com.readest.native_bridge
 import android.util.Log
 
 class NativeBridge {
-    fun auth_with_safari(value: String): String {
-        return ""
-    }
 }

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/android/src/main/java/NativeBridgePlugin.kt

@@ -1,7 +1,10 @@
 package com.readest.native_bridge
 
 import android.app.Activity
+import android.content.Intent
 import android.net.Uri
+import android.util.Log
+import androidx.browser.customtabs.CustomTabsIntent
 import app.tauri.annotation.Command
 import app.tauri.annotation.InvokeArg
 import app.tauri.annotation.TauriPlugin
@@ -11,7 +14,7 @@ import app.tauri.plugin.Invoke
 import java.io.*
 
 @InvokeArg
-class SafariAuthRequestArgs {
+class AuthRequestArgs {
   var authUrl: String? = null
 }
 
@@ -24,14 +27,25 @@ class CopyURIRequestArgs {
 @TauriPlugin
 class NativeBridgePlugin(private val activity: Activity): Plugin(activity) {
     private val implementation = NativeBridge()
+    private var redirectScheme = "readest"
+    private var redirectHost = "auth-callback"
+
+    companion object {
+        var pendingInvoke: Invoke? = null
+    }
 
     @Command
-    fun auth_with_safari(invoke: Invoke) {
-        val args = invoke.parseArgs(SafariAuthRequestArgs::class.java)
+    fun auth_with_custom_tab(invoke: Invoke) {
+        val args = invoke.parseArgs(AuthRequestArgs::class.java)
+        val uri = Uri.parse(args.authUrl)
 
-        val ret = JSObject()
-        ret.put("redirectUrl", implementation.auth_with_safari(args.authUrl ?: ""))
-        invoke.resolve(ret)
+        val customTabsIntent = CustomTabsIntent.Builder().build()
+        customTabsIntent.intent.flags = Intent.FLAG_ACTIVITY_NO_HISTORY
+
+        Log.d("NativeBridgePlugin", "Launching OAuth URL: ${args.authUrl}")
+        customTabsIntent.launchUrl(activity, uri)
+
+        pendingInvoke = invoke
     }
 
     @Command

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/build.rs

@@ -1,4 +1,8 @@
-const COMMANDS: &[&str] = &["auth_with_safari", "copy_uri_to_path"];
+const COMMANDS: &[&str] = &[
+    "auth_with_safari",
+    "auth_with_custom_tab",
+    "copy_uri_to_path",
+];
 
 fn main() {
     tauri_plugin::Builder::new(COMMANDS)

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/permissions/autogenerated/commands/auth_with_custom_tab.toml

@@ -0,0 +1,13 @@
+# Automatically generated - DO NOT EDIT!
+
+"$schema" = "../../schemas/schema.json"
+
+[[permission]]
+identifier = "allow-auth-with-custom-tab"
+description = "Enables the auth_with_custom_tab command without any pre-configured scope."
+commands.allow = ["auth_with_custom_tab"]
+
+[[permission]]
+identifier = "deny-auth-with-custom-tab"
+description = "Denies the auth_with_custom_tab command without any pre-configured scope."
+commands.deny = ["auth_with_custom_tab"]

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/permissions/autogenerated/reference.md

@@ -3,6 +3,7 @@
 Default permissions for the plugin
 
 - `allow-auth-with-safari`
+- `allow-auth-with-custom-tab`
 - `allow-copy-uri-to-path`
 
 ## Permission Table
@@ -14,6 +15,32 @@ Default permissions for the plugin
 </tr>
 
 
+<tr>
+<td>
+
+`native-bridge:allow-auth-with-custom-tab`
+
+</td>
+<td>
+
+Enables the auth_with_custom_tab command without any pre-configured scope.
+
+</td>
+</tr>
+
+<tr>
+<td>
+
+`native-bridge:deny-auth-with-custom-tab`
+
+</td>
+<td>
+
+Denies the auth_with_custom_tab command without any pre-configured scope.
+
+</td>
+</tr>
+
 <tr>
 <td>
 

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/permissions/default.toml

@@ -1,3 +1,3 @@
 [default]
 description = "Default permissions for the plugin"
-permissions = ["allow-auth-with-safari", "allow-copy-uri-to-path"]
+permissions = ["allow-auth-with-safari", "allow-auth-with-custom-tab", "allow-copy-uri-to-path"]

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/permissions/schemas/schema.json

@@ -294,6 +294,16 @@
     "PermissionKind": {
       "type": "string",
       "oneOf": [
+        {
+          "description": "Enables the auth_with_custom_tab command without any pre-configured scope.",
+          "type": "string",
+          "const": "allow-auth-with-custom-tab"
+        },
+        {
+          "description": "Denies the auth_with_custom_tab command without any pre-configured scope.",
+          "type": "string",
+          "const": "deny-auth-with-custom-tab"
+        },
         {
           "description": "Enables the auth_with_safari command without any pre-configured scope.",
           "type": "string",

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/src/commands.rs

@@ -7,11 +7,19 @@ use crate::Result;
 #[command]
 pub(crate) async fn auth_with_safari<R: Runtime>(
     app: AppHandle<R>,
-    payload: SafariAuthRequest,
-) -> Result<SafariAuthResponse> {
+    payload: AuthRequest,
+) -> Result<AuthResponse> {
     app.native_bridge().auth_with_safari(payload)
 }
 
+#[command]
+pub(crate) async fn auth_with_custom_tab<R: Runtime>(
+    app: AppHandle<R>,
+    payload: AuthRequest,
+) -> Result<AuthResponse> {
+    app.native_bridge().auth_with_custom_tab(payload)
+}
+
 #[command]
 pub(crate) async fn copy_uri_to_path<R: Runtime>(
     app: AppHandle<R>,

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/src/desktop.rs

@@ -14,10 +14,11 @@ pub fn init<R: Runtime, C: DeserializeOwned>(
 pub struct NativeBridge<R: Runtime>(AppHandle<R>);
 
 impl<R: Runtime> NativeBridge<R> {
-    pub fn auth_with_safari(
-        &self,
-        _payload: SafariAuthRequest,
-    ) -> crate::Result<SafariAuthResponse> {
+    pub fn auth_with_safari(&self, _payload: AuthRequest) -> crate::Result<AuthResponse> {
+        Err(crate::Error::UnsupportedPlatformError)
+    }
+
+    pub fn auth_with_custom_tab(&self, _payload: AuthRequest) -> crate::Result<AuthResponse> {
         Err(crate::Error::UnsupportedPlatformError)
     }
 

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/src/lib.rs

@@ -38,6 +38,7 @@ pub fn init<R: Runtime>() -> TauriPlugin<R> {
     Builder::new("native-bridge")
         .invoke_handler(tauri::generate_handler![
             commands::auth_with_safari,
+            commands::auth_with_custom_tab,
             commands::copy_uri_to_path,
         ])
         .setup(|app, api| {

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/src/mobile.rs

@@ -25,16 +25,21 @@ pub fn init<R: Runtime, C: DeserializeOwned>(
 pub struct NativeBridge<R: Runtime>(PluginHandle<R>);
 
 impl<R: Runtime> NativeBridge<R> {
-    pub fn auth_with_safari(
-        &self,
-        payload: SafariAuthRequest,
-    ) -> crate::Result<SafariAuthResponse> {
+    pub fn auth_with_safari(&self, payload: AuthRequest) -> crate::Result<AuthResponse> {
         self.0
             .run_mobile_plugin("auth_with_safari", payload)
             .map_err(Into::into)
     }
 }
 
+impl<R: Runtime> NativeBridge<R> {
+    pub fn auth_with_custom_tab(&self, payload: AuthRequest) -> crate::Result<AuthResponse> {
+        self.0
+            .run_mobile_plugin("auth_with_custom_tab", payload)
+            .map_err(Into::into)
+    }
+}
+
 impl<R: Runtime> NativeBridge<R> {
     pub fn copy_uri_to_path(&self, payload: CopyURIRequest) -> crate::Result<CopyURIResponse> {
         self.0

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/src/models.rs

@@ -2,13 +2,13 @@ use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase")]
-pub struct SafariAuthRequest {
+pub struct AuthRequest {
     pub auth_url: String,
 }
 
 #[derive(Debug, Clone, Default, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase")]
-pub struct SafariAuthResponse {
+pub struct AuthResponse {
     pub redirect_url: String,
 }