Add AT unresolved inspection

Author: RedNesto

src/main/kotlin/platform/mcp/at/AtUnresolvedReferenceInspection.kt

@@ -0,0 +1,48 @@
+/*
+ * Minecraft Development for IntelliJ
+ *
+ * https://mcdev.io/
+ *
+ * Copyright (C) 2024 minecraft-dev
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation, version 3.0 only.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.demonwav.mcdev.platform.mcp.at
+
+import com.demonwav.mcdev.platform.mcp.at.gen.psi.AtVisitor
+import com.intellij.codeInspection.LocalInspectionTool
+import com.intellij.codeInspection.ProblemHighlightType
+import com.intellij.codeInspection.ProblemsHolder
+import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiElementVisitor
+
+class AtUnresolvedReferenceInspection : LocalInspectionTool() {
+
+    override fun getStaticDescription(): String? = "Unresolved reference"
+
+    override fun buildVisitor(
+        holder: ProblemsHolder,
+        isOnTheFly: Boolean
+    ): PsiElementVisitor = object : AtVisitor() {
+        override fun visitElement(element: PsiElement) {
+            super.visitElement(element)
+
+            for (reference in element.references) {
+                if (reference.resolve() == null) {
+                    holder.registerProblem(reference, ProblemHighlightType.LIKE_UNKNOWN_SYMBOL)
+                }
+            }
+        }
+    }
+}

src/main/resources/META-INF/plugin.xml

@@ -1000,6 +1000,13 @@
                          editorAttributes="NOT_USED_ELEMENT_ATTRIBUTES"
                          hasStaticDescription="true"
                          implementationClass="com.demonwav.mcdev.platform.mcp.at.AtUsageInspection"/>
+        <localInspection displayName="Unresolved reference"
+                         groupName="MCP"
+                         language="Access Transformers"
+                         enabledByDefault="true"
+                         level="ERROR"
+                         hasStaticDescription="true"
+                         implementationClass="com.demonwav.mcdev.platform.mcp.at.AtUnresolvedReferenceInspection"/>
         <localInspection displayName="Invalid empty ItemStack comparison with ItemStack.EMPTY"
                          groupName="MCP"
                          language="JAVA"