refactor: read local file with fs plugin for Tauri App, closes #553 and closes #489 (#785)

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

@@ -1,18 +1,26 @@
 package com.readest.native_bridge
 
 import android.app.Activity
+import android.net.Uri
 import app.tauri.annotation.Command
 import app.tauri.annotation.InvokeArg
 import app.tauri.annotation.TauriPlugin
 import app.tauri.plugin.JSObject
 import app.tauri.plugin.Plugin
 import app.tauri.plugin.Invoke
+import java.io.*
 
 @InvokeArg
 class SafariAuthRequestArgs {
   var authUrl: String? = null
 }
 
+@InvokeArg
+class CopyURIRequestArgs {
+  var uri: String? = null
+  var dst: String? = null
+}
+
 @TauriPlugin
 class NativeBridgePlugin(private val activity: Activity): Plugin(activity) {
     private val implementation = NativeBridge()
@@ -25,4 +33,31 @@ class NativeBridgePlugin(private val activity: Activity): Plugin(activity) {
         ret.put("redirectUrl", implementation.auth_with_safari(args.authUrl ?: ""))
         invoke.resolve(ret)
     }
+
+    @Command
+    fun copy_uri_to_path(invoke: Invoke) {
+        val args = invoke.parseArgs(CopyURIRequestArgs::class.java)
+        val ret = JSObject()
+        try {
+            val uri = Uri.parse(args.uri ?: "")
+            val dst = File(args.dst ?: "")
+            val inputStream = activity.contentResolver.openInputStream(uri)
+
+            if (inputStream != null) {
+                dst.outputStream().use { output ->
+                    inputStream.use { input ->
+                        input.copyTo(output)
+                    }
+                }
+                ret.put("success", true)
+            } else {
+                ret.put("success", false)
+                ret.put("error", "Failed to open input stream from URI")
+            }
+        } catch (e: Exception) {
+            ret.put("success", false)
+            ret.put("error", e.message)
+        }
+        invoke.resolve(ret)
+    }
 }