implement isSymlink (#5)

Author: itsvks19

android/app/src/main/java/com/foxdebug/acode/plugins/AcodeNativeFs.kt

@@ -0,0 +1,42 @@
+package com.foxdebug.acode.plugins
+
+import android.content.Context
+import android.net.Uri
+import android.os.Build
+import android.provider.MediaStore
+import androidx.core.net.toFile
+import androidx.core.net.toUri
+import java.io.File
+import java.nio.file.Files
+
+class AcodeNativeFs(private val context: Context) {
+
+    @Throws(Exception::class)
+    fun isSymlink(uri: String): Boolean {
+        val file = getFileFromUri(uri.toUri()) ?: return false
+        if (file.exists().not()) return false
+
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            Files.isSymbolicLink(file.toPath())
+        } else file.canonicalPath != file.absolutePath
+    }
+
+    private fun getFileFromUri(uri: Uri): File? {
+        return when (uri.scheme) {
+            "file" -> uri.toFile()
+
+            "content" -> {
+                val projection = arrayOf(MediaStore.MediaColumns.DATA)
+                context.contentResolver.query(uri, projection, null, null, null)?.use {
+                    val columnIndex = it.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA)
+                    if (it.moveToFirst()) {
+                        val filePath = it.getString(columnIndex)
+                        if (filePath != null) File(filePath) else null
+                    } else null
+                }
+            }
+
+            else -> null
+        }
+    }
+}

android/app/src/main/java/com/foxdebug/acode/plugins/NativeLayer.kt

@@ -1,9 +1,9 @@
 package com.foxdebug.acode.plugins
 
 import android.content.Intent
-import android.net.Uri
 import android.os.Build
 import androidx.appcompat.app.AlertDialog
+import androidx.core.net.toUri
 import com.foxdebug.acode.Acode
 import com.foxdebug.acode.runOnUiThread
 import com.getcapacitor.JSObject
@@ -15,12 +15,13 @@ import kotlinx.coroutines.CoroutineName
 import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.cancel
 import kotlinx.coroutines.plus
-import androidx.core.net.toUri
 
 @CapacitorPlugin(name = "NativeLayer")
 class NativeLayer : Plugin() {
     val scope = MainScope() + CoroutineName("NativeLayer")
 
+    private val nativeFs = AcodeNativeFs(context)
+
     override fun handleOnDestroy() {
         super.handleOnDestroy()
         scope.cancel()
@@ -196,4 +197,21 @@ class NativeLayer : Plugin() {
             }
         }
     }
+
+    @PluginMethod
+    fun isSymlink(call: PluginCall) {
+        val uri = call.getString("uri") ?: run {
+            call.reject("Missing 'uri'")
+            return
+        }
+
+        val isSymlink = try {
+            nativeFs.isSymlink(uri)
+        } catch (e: Exception) {
+            // call.reject("Failed to check if URI is a symlink: ${e.message}")
+            false
+        }
+
+        call.resolve(JSObject().put("isSymlink", isSymlink))
+    }
 }