feat(java): add detectLanguageLevel function

Add a new function `detectLanguageLevel` to the `JavaBuildSystemProvider.kt` file. This function is responsible for detecting the language level of the Java SDK being used in the project. It checks the project SDK and module SDK to determine the language level. If the language level is detected, it returns the corresponding `LanguageLevel` object. This function will be used in the `JavaVersionProvider.kt` file to provide information about the Java SDK version being used in the project.

Author: phodal

java/src/233/main/kotlin/cc/unitmesh/idea/provider/JavaBuildSystemProvider.kt

@@ -5,7 +5,6 @@ import cc.unitmesh.devti.template.context.DockerfileContext
 import com.intellij.openapi.externalSystem.service.project.ProjectDataManager
 import com.intellij.openapi.externalSystem.service.ui.completion.TextCompletionInfo
 import com.intellij.openapi.module.LanguageLevelUtil
-import com.intellij.openapi.module.Module
 import com.intellij.openapi.module.ModuleManager
 import com.intellij.openapi.module.ModuleUtilCore
 import com.intellij.openapi.project.Project
@@ -16,7 +15,6 @@ import com.intellij.openapi.roots.ProjectRootManager
 import com.intellij.pom.java.LanguageLevel
 import com.intellij.psi.PsiFile
 import com.intellij.psi.util.PsiUtil
-import com.intellij.util.lang.JavaVersion
 import org.jetbrains.plugins.gradle.service.project.GradleTasksIndices
 import org.jetbrains.plugins.gradle.util.GradleConstants
 
@@ -55,23 +53,6 @@ open class JavaBuildSystemProvider : BuildSystemProvider() {
     }
 
     companion object {
-        fun detectLanguageLevel(project: Project, sourceFile: PsiFile?): LanguageLevel? {
-            val projectSdk = ProjectRootManager.getInstance(project).projectSdk
-            if (projectSdk != null) {
-                if (projectSdk.sdkType !is JavaSdkType) return null
-                return PsiUtil.getLanguageLevel(project)
-            }
-
-            var moduleOfFile = ModuleUtilCore.findModuleForFile(sourceFile)
-            if (moduleOfFile == null) {
-                moduleOfFile = ModuleManager.getInstance(project).modules.firstOrNull() ?: return null
-            }
-
-            val sdk = ModuleRootManager.getInstance(moduleOfFile).sdk ?: return null
-            if (sdk.sdkType !is JavaSdkType) return null
-
-            return LanguageLevelUtil.getEffectiveLanguageLevel(moduleOfFile)
-        }
 
         val GRADLE_COMPLETION_COMPARATOR = Comparator<String> { o1, o2 ->
             when {
@@ -90,3 +71,21 @@ open class JavaBuildSystemProvider : BuildSystemProvider() {
         }
     }
 }
+
+fun detectLanguageLevel(project: Project, sourceFile: PsiFile?): LanguageLevel? {
+    val projectSdk = ProjectRootManager.getInstance(project).projectSdk
+    if (projectSdk != null) {
+        if (projectSdk.sdkType !is JavaSdkType) return null
+        return PsiUtil.getLanguageLevel(project)
+    }
+
+    var moduleOfFile = ModuleUtilCore.findModuleForFile(sourceFile)
+    if (moduleOfFile == null) {
+        moduleOfFile = ModuleManager.getInstance(project).modules.firstOrNull() ?: return null
+    }
+
+    val sdk = ModuleRootManager.getInstance(moduleOfFile).sdk ?: return null
+    if (sdk.sdkType !is JavaSdkType) return null
+
+    return LanguageLevelUtil.getEffectiveLanguageLevel(moduleOfFile)
+}

java/src/main/kotlin/cc/unitmesh/idea/provider/JavaVersionProvider.kt

@@ -10,7 +10,6 @@ import com.intellij.openapi.project.Project
 import com.intellij.openapi.projectRoots.JavaSdkType
 import com.intellij.openapi.roots.ModuleRootManager
 import com.intellij.openapi.roots.ProjectRootManager
-import com.intellij.util.lang.JavaVersion
 
 class JavaVersionProvider : ChatContextProvider {
     override suspend fun collect(
@@ -24,15 +23,16 @@ class JavaVersionProvider : ChatContextProvider {
             return emptyList()
         }
 
-        val javaVersion = JavaVersion.current()
-        val javaVersionStr = "${javaVersion.feature}"
-
-        val chatContextItem = ChatContextItem(
-            JavaVersionProvider::class,
-            "You are working on a project that uses Java SDK version $javaVersionStr."
-        )
+        detectLanguageLevel(project, psiFile)?.let { javaVersion ->
+            return listOf(
+                ChatContextItem(
+                    JavaVersionProvider::class,
+                    "You are working on a project that uses Java SDK version $javaVersion."
+                )
+            )
+        }
 
-        return listOf(chatContextItem)
+        return emptyList()
     }
 
     override fun isApplicable(project: Project, creationContext: ChatCreationContext): Boolean {