Ability to load custom modules. A module for logging queries

core/src/main/groovy/com/muwire/core/Core.groovy

@@ -166,6 +166,8 @@ public class Core {
     
     final SigningPrivateKey spk
 
+    private final List<MWModule> modules = new ArrayList<>()
+
     public Core(MuWireSettings props, File home, String myVersion) {
         this.home = home
         this.version = myVersion
@@ -499,9 +501,25 @@ public class Core {
             register(UIMessageDeleteEvent.class, messenger)
             register(UIMessageReadEvent.class, messenger)
         }
+
+        File modulesProps = new File(home, "mwmodules.list")
+        if (modulesProps.exists()) {
+            log.info("loading modules")
+            modulesProps.eachLine {
+                Class moduleClass = Class.forName(it)
+                MWModule module = moduleClass.newInstance()
+                modules.add(module)
+            }
+        }
     }
 
     public void startServices() {
+
+        modules.each {
+            log.info("initializing module ${it.getName()}")
+            it.init(this)
+        }
+
         i2pSession.connect()
         hasherService.start()
         trustService.start()
@@ -516,6 +534,11 @@ public class Core {
         feedManager.start()
         feedClient.start()
         trackerResponder.start()
+
+        modules.each {
+            log.info("starting module ${it.getName()}")
+            it.start()
+        }
     }
 
     public void shutdown() {
@@ -523,6 +546,12 @@ public class Core {
             log.info("already shutting down")
             return
         }
+
+        modules.each {
+            log.info("shutting down module ${it.getName()}")
+            it.stop()
+        }
+
         log.info("saving settings")
         saveMuSettings()
         log.info("shutting down host cache")

core/src/main/groovy/com/muwire/core/MWModule.groovy

@@ -0,0 +1,9 @@
+package com.muwire.core
+
+interface MWModule {
+    public String getName()
+    public void init(Core core)
+    public void start()
+    public void stop()
+}
+

mwmodules/build.gradle

@@ -0,0 +1,3 @@
+dependencies {
+    compile project(":core")
+}

mwmodules/src/main/groovy/QueryLogger.groovy

@@ -0,0 +1,32 @@
+import com.muwire.core.Core
+import com.muwire.core.MWModule
+import com.muwire.core.search.SearchEvent
+
+class QueryLogger implements MWModule {
+    private final File dump = new File("searches.csv")
+
+    void onSearchEvent(SearchEvent e) {
+        dump.withWriterAppend("UTF-8", {writer ->
+            String coalesced = String.join(" ", e.searchTerms)
+            writer.append(String.format("%d,%s,%s\n", e.getTimestamp(), coalesced, e.persona.getHumanReadableName()))
+        })
+    }
+
+    @Override
+    String getName() {
+        "QueryLogger"
+    }
+
+    @Override
+    void init(Core core) {
+        core.getEventBus().register(SearchEvent.class, this)
+    }
+
+    @Override
+    void start() {
+    }
+
+    @Override
+    void stop() {
+    }
+}

settings.gradle

@@ -2,6 +2,7 @@ include 'pinger'
 include 'host-cache'
 include 'update-server'
 include 'core'
+include 'mwmodules'
 include 'gui'
 include 'cli'
 include 'cli-lanterna'