feat(amazonq): add virtualFile -> URI util

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/lsp/util/FileUriUtil.kt

@@ -0,0 +1,21 @@
+// Copyright 2025 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.util
+
+import com.intellij.openapi.vfs.VfsUtil
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.openapi.vfs.VfsUtilCore
+import java.net.URI
+import java.net.URLEncoder
+import java.nio.charset.StandardCharsets
+
+object FileUriUtil {
+
+    fun toUriString(virtualFile: VirtualFile): String {
+        val file = VfsUtilCore.virtualToIoFile(virtualFile)
+        return VfsUtil.toUri(file).toString()
+
+    }
+}
+

plugins/amazonq/shared/jetbrains-community/tst/software/aws/toolkits/jetbrains/services/amazonq/lsp/util/FileUriUtil.kt

@@ -0,0 +1,72 @@
+package software.aws.toolkits.jetbrains.services.amazonq.lsp.util
+
+import com.intellij.openapi.vfs.JarFileSystem
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.openapi.vfs.newvfs.impl.VirtualFileSystemEntry
+import com.intellij.rt.coverage.util.ErrorReporter.setPath
+import com.intellij.testFramework.LightVirtualFile
+import com.intellij.testFramework.fixtures.BasePlatformTestCase
+import io.mockk.every
+import io.mockk.mockk
+import java.io.File
+import org.junit.Test
+import kotlin.test.assertEquals
+
+class FileUriUtilTest : BasePlatformTestCase() {
+
+    private fun createMockVirtualFile(path: String): VirtualFile =
+        LightVirtualFile(path)
+
+
+    @Test
+    fun `test basic unix path`() {
+        val virtualFile = createMockVirtualFile("/path/to/file.txt")
+        val uri = FileUriUtil.toUriString(virtualFile)
+        assertEquals("file:///path/to/file.txt", uri)
+    }
+
+    @Test
+    fun `test path with spaces`() {
+        val virtualFile = createMockVirtualFile("/path/with spaces/file.txt")
+        val uri = FileUriUtil.toUriString(virtualFile)
+        assertEquals("file:///path/with%20spaces/file.txt", uri)
+    }
+
+    @Test
+    fun `test windows style path`() {
+        val virtualFile = createMockVirtualFile("C:\\path\\to\\file.txt")
+        val uri = FileUriUtil.toUriString(virtualFile)
+        assertEquals("file:///C:/path/to/file.txt", uri)
+    }
+
+    @Test
+    fun `test root path`() {
+        val virtualFile = createMockVirtualFile("/")
+        val uri = FileUriUtil.toUriString(virtualFile)
+        assertEquals("file:///", uri)
+    }
+
+    @Test
+    fun `test path with multiple separators`() {
+        val virtualFile = createMockVirtualFile("/path//to///file.txt")
+        val uri = FileUriUtil.toUriString(virtualFile)
+        assertEquals("file:///path/to/file.txt", uri)
+    }
+
+    @Test
+    fun `test very long path`() {
+        val longPath = "/a".repeat(256) + "/file.txt"
+        val virtualFile = createMockVirtualFile(longPath)
+        val uri = FileUriUtil.toUriString(virtualFile)
+        assertTrue(uri.startsWith("file:///"))
+        assertTrue(uri.endsWith("/file.txt"))
+    }
+
+    @Test
+    fun `test relative path`() {
+        val virtualFile = createMockVirtualFile("./relative/path/file.txt")
+        val uri = FileUriUtil.toUriString(virtualFile)
+        assertTrue(uri.contains("file.txt"))
+        assertTrue(uri.startsWith("file:///"))
+    }
+}