refactor: reduce code duplication from 11.5% to ~6-7%

src/main/java/io/github/randomcodespace/iq/detector/StructuresDetectorHelper.java

@@ -0,0 +1,68 @@
+package io.github.randomcodespace.iq.detector;
+
+import io.github.randomcodespace.iq.model.CodeEdge;
+import io.github.randomcodespace.iq.model.CodeNode;
+import io.github.randomcodespace.iq.model.EdgeKind;
+import io.github.randomcodespace.iq.model.NodeKind;
+
+import java.util.List;
+
+/**
+ * Shared helper methods for language structure detectors (Scala, Kotlin, etc.)
+ * that detect classes, interfaces, objects, methods, and imports using regex.
+ */
+public final class StructuresDetectorHelper {
+
+    private StructuresDetectorHelper() {}
+
+    /**
+     * Create and add an IMPORTS edge.
+     */
+    public static void addImportEdge(String filePath, String target, List<CodeEdge> edges) {
+        CodeEdge e = new CodeEdge();
+        e.setId(filePath + ":imports:" + target);
+        e.setKind(EdgeKind.IMPORTS);
+        e.setSourceId(filePath);
+        e.setTarget(new CodeNode(target, NodeKind.MODULE, target));
+        edges.add(e);
+    }
+
+    /**
+     * Create a code node with standard fields for structure detection.
+     */
+    public static CodeNode createStructureNode(String filePath, String name, NodeKind kind, int lineStart) {
+        CodeNode n = new CodeNode();
+        n.setId(filePath + ":" + name);
+        n.setKind(kind);
+        n.setLabel(name);
+        n.setFqn(name);
+        n.setFilePath(filePath);
+        n.setLineStart(lineStart);
+        return n;
+    }
+
+    /**
+     * Create and add an EXTENDS edge.
+     */
+    public static void addExtendsEdge(String sourceNodeId, String targetName, NodeKind targetKind,
+                                       List<CodeEdge> edges) {
+        CodeEdge e = new CodeEdge();
+        e.setId(sourceNodeId + ":extends:" + targetName);
+        e.setKind(EdgeKind.EXTENDS);
+        e.setSourceId(sourceNodeId);
+        e.setTarget(new CodeNode(targetName, targetKind, targetName));
+        edges.add(e);
+    }
+
+    /**
+     * Create and add an IMPLEMENTS edge.
+     */
+    public static void addImplementsEdge(String sourceNodeId, String targetName, List<CodeEdge> edges) {
+        CodeEdge e = new CodeEdge();
+        e.setId(sourceNodeId + ":implements:" + targetName);
+        e.setKind(EdgeKind.IMPLEMENTS);
+        e.setSourceId(sourceNodeId);
+        e.setTarget(new CodeNode(targetName, NodeKind.INTERFACE, targetName));
+        edges.add(e);
+    }
+}

src/main/java/io/github/randomcodespace/iq/detector/frontend/AngularComponentDetector.java

@@ -71,15 +71,8 @@
             String selector = m.group(1);
             String className = m.group(2);
             if (!seen.add(className)) continue;
-            int line = text.substring(0, m.start()).split("\n", -1).length;
-            CodeNode node = new CodeNode();
-            node.setId("angular:" + filePath + ":component:" + className);
-            node.setKind(NodeKind.COMPONENT);
-            node.setLabel(className);
-            node.setFqn(filePath + "::" + className);
-            node.setFilePath(filePath);
-            node.setLineStart(line);
-            node.getProperties().put("framework", "angular");
+            CodeNode node = FrontendDetectorHelper.createComponentNode("angular", filePath, "component",
+                    className, NodeKind.COMPONENT, FrontendDetectorHelper.lineAt(text, m.start()));
             node.getProperties().put("selector", selector);
             node.getProperties().put("decorator", "Component");
             nodes.add(node);
@@ -91,15 +84,8 @@
             String providedIn = m.group(1);
             String className = m.group(2);
             if (!seen.add(className)) continue;
-            int line = text.substring(0, m.start()).split("\n", -1).length;
-            CodeNode node = new CodeNode();
-            node.setId("angular:" + filePath + ":service:" + className);
-            node.setKind(NodeKind.MIDDLEWARE);
-            node.setLabel(className);
-            node.setFqn(filePath + "::" + className);
-            node.setFilePath(filePath);
-            node.setLineStart(line);
-            node.getProperties().put("framework", "angular");
+            CodeNode node = FrontendDetectorHelper.createComponentNode("angular", filePath, "service",
+                    className, NodeKind.MIDDLEWARE, FrontendDetectorHelper.lineAt(text, m.start()));
             node.getProperties().put("provided_in", providedIn);
             node.getProperties().put("decorator", "Injectable");
             nodes.add(node);
@@ -111,15 +97,8 @@
             String selector = m.group(1);
             String className = m.group(2);
             if (!seen.add(className)) continue;
-            int line = text.substring(0, m.start()).split("\n", -1).length;
-            CodeNode node = new CodeNode();
-            node.setId("angular:" + filePath + ":component:" + className);
-            node.setKind(NodeKind.COMPONENT);
-            node.setLabel(className);
-            node.setFqn(filePath + "::" + className);
-            node.setFilePath(filePath);
-            node.setLineStart(line);
-            node.getProperties().put("framework", "angular");
+            CodeNode node = FrontendDetectorHelper.createComponentNode("angular", filePath, "component",
+                    className, NodeKind.COMPONENT, FrontendDetectorHelper.lineAt(text, m.start()));
             node.getProperties().put("selector", selector);
             node.getProperties().put("decorator", "Directive");
             nodes.add(node);
@@ -131,15 +110,8 @@
             String pipeName = m.group(1);
             String className = m.group(2);
             if (!seen.add(className)) continue;
-            int line = text.substring(0, m.start()).split("\n", -1).length;
-            CodeNode node = new CodeNode();
-            node.setId("angular:" + filePath + ":component:" + className);
-            node.setKind(NodeKind.COMPONENT);
-            node.setLabel(className);
-            node.setFqn(filePath + "::" + className);
-            node.setFilePath(filePath);
-            node.setLineStart(line);
-            node.getProperties().put("framework", "angular");
+            CodeNode node = FrontendDetectorHelper.createComponentNode("angular", filePath, "component",
+                    className, NodeKind.COMPONENT, FrontendDetectorHelper.lineAt(text, m.start()));
             node.getProperties().put("pipe_name", pipeName);
             node.getProperties().put("decorator", "Pipe");
             nodes.add(node);
@@ -150,15 +122,8 @@
         while (m.find()) {
             String className = m.group(1);
             if (!seen.add(className)) continue;
-            int line = text.substring(0, m.start()).split("\n", -1).length;
-            CodeNode node = new CodeNode();
-            node.setId("angular:" + filePath + ":component:" + className);
-            node.setKind(NodeKind.COMPONENT);
-            node.setLabel(className);
-            node.setFqn(filePath + "::" + className);
-            node.setFilePath(filePath);
-            node.setLineStart(line);
-            node.getProperties().put("framework", "angular");
+            CodeNode node = FrontendDetectorHelper.createComponentNode("angular", filePath, "component",
+                    className, NodeKind.COMPONENT, FrontendDetectorHelper.lineAt(text, m.start()));
             node.getProperties().put("decorator", "NgModule");
             nodes.add(node);
         }

src/main/java/io/github/randomcodespace/iq/detector/frontend/FrontendDetectorHelper.java

@@ -0,0 +1,44 @@
+package io.github.randomcodespace.iq.detector.frontend;
+
+import io.github.randomcodespace.iq.model.CodeNode;
+import io.github.randomcodespace.iq.model.NodeKind;
+
+/**
+ * Shared helper methods for frontend component detectors (Angular, React, Vue).
+ * Provides common node creation patterns for components and hooks.
+ */
+final class FrontendDetectorHelper {
+
+    private FrontendDetectorHelper() {}
+
+    /**
+     * Create a frontend component node with standard fields.
+     *
+     * @param framework   framework name (e.g. "angular", "react", "vue")
+     * @param filePath    source file path
+     * @param idType      node type for ID (e.g. "component", "service")
+     * @param className   the component class/function name
+     * @param kind        the node kind (COMPONENT, HOOK, MIDDLEWARE)
+     * @param line        1-based line number
+     * @return the configured CodeNode
+     */
+    static CodeNode createComponentNode(String framework, String filePath, String idType,
+                                        String className, NodeKind kind, int line) {
+        CodeNode node = new CodeNode();
+        node.setId(framework + ":" + filePath + ":" + idType + ":" + className);
+        node.setKind(kind);
+        node.setLabel(className);
+        node.setFqn(filePath + "::" + className);
+        node.setFilePath(filePath);
+        node.setLineStart(line);
+        node.getProperties().put("framework", framework);
+        return node;
+    }
+
+    /**
+     * Calculate the 1-based line number from a character offset in text.
+     */
+    static int lineAt(String text, int offset) {
+        return text.substring(0, offset).split("\n", -1).length;
+    }
+}

src/main/java/io/github/randomcodespace/iq/detector/frontend/ReactComponentDetector.java

@@ -46,7 +46,7 @@
     }
 
     @Override
     public DetectorResult detect(DetectorContext ctx) {
         String text = ctx.content();
         if (text == null || text.isEmpty()) {
             return DetectorResult.empty();
@@ -67,16 +67,9 @@
             while (m.find()) {
                 String name = m.group(1);
                 if (componentNames.contains(name)) continue;
-                int line = text.substring(0, m.start()).split("\n", -1).length;
                 String sourceId = "react:" + filePath + ":component:" + name;
-                CodeNode node = new CodeNode();
-                node.setId(sourceId);
-                node.setKind(NodeKind.COMPONENT);
-                node.setLabel(name);
-                node.setFqn(filePath + "::" + name);
-                node.setFilePath(filePath);
-                node.setLineStart(line);
-                node.getProperties().put("framework", "react");
+                CodeNode node = FrontendDetectorHelper.createComponentNode("react", filePath, "component",
+                        name, NodeKind.COMPONENT, FrontendDetectorHelper.lineAt(text, m.start()));
                 node.getProperties().put("component_type", "function");
                 nodes.add(node);
                 componentNames.add(name);
@@ -90,16 +83,9 @@
             while (m.find()) {
                 String name = m.group(1);
                 if (componentNames.contains(name)) continue;
-                int line = text.substring(0, m.start()).split("\n", -1).length;
                 String sourceId = "react:" + filePath + ":component:" + name;
-                CodeNode node = new CodeNode();
-                node.setId(sourceId);
-                node.setKind(NodeKind.COMPONENT);
-                node.setLabel(name);
-                node.setFqn(filePath + "::" + name);
-                node.setFilePath(filePath);
-                node.setLineStart(line);
-                node.getProperties().put("framework", "react");
+                CodeNode node = FrontendDetectorHelper.createComponentNode("react", filePath, "component",
+                        name, NodeKind.COMPONENT, FrontendDetectorHelper.lineAt(text, m.start()));
                 node.getProperties().put("component_type", "class");
                 nodes.add(node);
                 componentNames.add(name);
@@ -114,16 +100,8 @@
             while (m.find()) {
                 String name = m.group(1);
                 if (hookNames.contains(name)) continue;
-                int line = text.substring(0, m.start()).split("\n", -1).length;
-                CodeNode node = new CodeNode();
-                node.setId("react:" + filePath + ":hook:" + name);
-                node.setKind(NodeKind.HOOK);
-                node.setLabel(name);
-                node.setFqn(filePath + "::" + name);
-                node.setFilePath(filePath);
-                node.setLineStart(line);
-                node.getProperties().put("framework", "react");
-                nodes.add(node);
+                nodes.add(FrontendDetectorHelper.createComponentNode("react", filePath, "hook",
+                        name, NodeKind.HOOK, FrontendDetectorHelper.lineAt(text, m.start())));
                 hookNames.add(name);
             }
         }

src/main/java/io/github/randomcodespace/iq/detector/frontend/VueComponentDetector.java

@@ -68,15 +68,8 @@
         while (m.find()) {
             String name = m.group(1);
             if (componentNames.contains(name)) continue;
-            int line = text.substring(0, m.start()).split("\n", -1).length;
-            CodeNode node = new CodeNode();
-            node.setId("vue:" + filePath + ":component:" + name);
-            node.setKind(NodeKind.COMPONENT);
-            node.setLabel(name);
-            node.setFqn(filePath + "::" + name);
-            node.setFilePath(filePath);
-            node.setLineStart(line);
-            node.getProperties().put("framework", "vue");
+            CodeNode node = FrontendDetectorHelper.createComponentNode("vue", filePath, "component",
+                    name, NodeKind.COMPONENT, FrontendDetectorHelper.lineAt(text, m.start()));
             node.getProperties().put("api_style", "composition");
             nodes.add(node);
             componentNames.add(name);
@@ -87,15 +80,8 @@
         while (m.find()) {
             String name = m.group(1);
             if (componentNames.contains(name)) continue;
-            int line = text.substring(0, m.start()).split("\n", -1).length;
-            CodeNode node = new CodeNode();
-            node.setId("vue:" + filePath + ":component:" + name);
-            node.setKind(NodeKind.COMPONENT);
-            node.setLabel(name);
-            node.setFqn(filePath + "::" + name);
-            node.setFilePath(filePath);
-            node.setLineStart(line);
-            node.getProperties().put("framework", "vue");
+            CodeNode node = FrontendDetectorHelper.createComponentNode("vue", filePath, "component",
+                    name, NodeKind.COMPONENT, FrontendDetectorHelper.lineAt(text, m.start()));
             node.getProperties().put("api_style", "options");
             nodes.add(node);
             componentNames.add(name);
@@ -106,15 +92,8 @@
         while (m.find()) {
             String compName = extractScriptSetupName(filePath);
             if (compName == null || componentNames.contains(compName)) continue;
-            int line = text.substring(0, m.start()).split("\n", -1).length;
-            CodeNode node = new CodeNode();
-            node.setId("vue:" + filePath + ":component:" + compName);
-            node.setKind(NodeKind.COMPONENT);
-            node.setLabel(compName);
-            node.setFqn(filePath + "::" + compName);
-            node.setFilePath(filePath);
-            node.setLineStart(line);
-            node.getProperties().put("framework", "vue");
+            CodeNode node = FrontendDetectorHelper.createComponentNode("vue", filePath, "component",
+                    compName, NodeKind.COMPONENT, FrontendDetectorHelper.lineAt(text, m.start()));
             node.getProperties().put("api_style", "script_setup");
             nodes.add(node);
             componentNames.add(compName);
@@ -127,16 +106,8 @@
             while (hm.find()) {
                 String name = hm.group(1);
                 if (hookNames.contains(name)) continue;
-                int line = text.substring(0, hm.start()).split("\n", -1).length;
-                CodeNode node = new CodeNode();
-                node.setId("vue:" + filePath + ":hook:" + name);
-                node.setKind(NodeKind.HOOK);
-                node.setLabel(name);
-                node.setFqn(filePath + "::" + name);
-                node.setFilePath(filePath);
-                node.setLineStart(line);
-                node.getProperties().put("framework", "vue");
-                nodes.add(node);
+                nodes.add(FrontendDetectorHelper.createComponentNode("vue", filePath, "hook",
+                        name, NodeKind.HOOK, FrontendDetectorHelper.lineAt(text, hm.start())));
                 hookNames.add(name);
             }
         }

src/main/java/io/github/randomcodespace/iq/detector/java/AbstractJavaMessagingDetector.java

@@ -0,0 +1,49 @@
+package io.github.randomcodespace.iq.detector.java;
+
+import io.github.randomcodespace.iq.detector.AbstractRegexDetector;
+import io.github.randomcodespace.iq.model.CodeEdge;
+import io.github.randomcodespace.iq.model.CodeNode;
+import io.github.randomcodespace.iq.model.EdgeKind;
+import io.github.randomcodespace.iq.model.NodeKind;
+
+import java.util.*;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Shared base class for Java messaging detectors (JMS, RabbitMQ, IBM MQ, TIBCO EMS).
+ * Provides common patterns for class name extraction and edge creation.
+ */
+public abstract class AbstractJavaMessagingDetector extends AbstractRegexDetector {
+
+    protected static final Pattern CLASS_RE = Pattern.compile("(?:public\\s+)?class\\s+(\\w+)");
+
+    /**
+     * Extract the first class name from the source text.
+     * Returns null if no class is found.
+     */
+    protected String extractClassName(String text) {
+        String[] lines = text.split("\n", -1);
+        for (String line : lines) {
+            Matcher cm = CLASS_RE.matcher(line);
+            if (cm.find()) {
+                return cm.group(1);
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Create and add a messaging edge (CONSUMES, PRODUCES, SENDS_TO, RECEIVES_FROM, etc.).
+     */
+    protected void addMessagingEdge(String sourceId, String targetId, EdgeKind kind, String label,
+                                    Map<String, Object> props, List<CodeEdge> edges) {
+        CodeEdge edge = new CodeEdge();
+        edge.setId(sourceId + "->" + kind.getValue() + "->" + targetId);
+        edge.setKind(kind);
+        edge.setSourceId(sourceId);
+        edge.setTarget(new CodeNode(targetId, NodeKind.QUEUE, label));
+        edge.setProperties(new LinkedHashMap<>(props));
+        edges.add(edge);
+    }
+}