show warning when unsharing files in collections

gui/griffon-app/conf/Config.groovy

@@ -161,4 +161,9 @@ mvcGroups {
         view = 'com.muwire.gui.CollectionTabView'
         controller = 'com.muwire.gui.CollectionTabController'
     }
+    'collection-warning' {
+        model = "com.muwire.gui.CollectionWarningModel"
+        view = "com.muwire.gui.CollectionWarningView"
+        controller = "com.muwire.gui.CollectionWarningController"
+    }
 }

gui/griffon-app/controllers/com/muwire/gui/CollectionWarningController.groovy

@@ -0,0 +1,36 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonController
+import griffon.core.controller.ControllerAction
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+import javax.annotation.Nonnull
+
+@ArtifactProviderFor(GriffonController)
+class CollectionWarningController {
+    @MVCMember @Nonnull
+    CollectionWarningModel model
+    @MVCMember @Nonnull
+    CollectionWarningView view
+
+    @ControllerAction
+    void unshare() {
+        model.answer[0] = true
+        
+        if (view.rememberCheckbox.model.isSelected()) {
+            model.settings.collectionWarning = false
+            File propsFile = new File(model.home, "gui.properties")
+            propsFile.withOutputStream { 
+                model.settings.write(it)
+            }
+        }
+        
+        cancel()
+    }
+    
+    @ControllerAction
+    void cancel() {
+        view.dialog.setVisible(false)
+        mvcGroup.destroy()
+    }
+}

gui/griffon-app/controllers/com/muwire/gui/MainFrameController.groovy

@@ -403,11 +403,31 @@ class MainFrameController {
     }
 
     void unshareSelectedFile() {
-        def sf = view.selectedSharedFiles()
+        def sfs = view.selectedSharedFiles()
-        if (sf == null)
+        if (sfs == null)
             return
-        sf.each {  
+        sfs.each { SharedFile sf ->
-            core.eventBus.publish(new FileUnsharedEvent(unsharedFile : it))
+            
+            if (view.settings.collectionWarning) {
+                Set<InfoHash> collectionsInfoHashes = core.collectionManager.collectionsForFile(new InfoHash(sf.root))
+                if (collectionsInfoHashes != null) {
+                    String[] affected = collectionsInfoHashes.collect({core.collectionManager.getByInfoHash(it)}).collect{it.name}.toArray(new String[0])
+
+                    boolean [] answer = new boolean[1]
+                    def props = [:]
+                    props.collections = affected
+                    props.answer = answer
+                    props.fileName = sf.file.getName()
+                    props.settings = view.settings
+                    props.home = core.home
+                    def mvc = mvcGroup.createMVCGroup("collection-warning", props)
+                    mvc.destroy()
+                    if (!answer[0])
+                        return
+                }
+            }
+            
+            core.eventBus.publish(new FileUnsharedEvent(unsharedFile : sf))
         }
     }
     

gui/griffon-app/i18n/messages.properties

@@ -555,3 +555,9 @@ COLLECTION_VIEWS=Collection views
 COLLECTION_SELECT=Select a collection to view it's description
 DESCRIPTION=Description
 COLLECTION_DOWNLOAD=Download Full Collection
+
+## Collections warning dialog
+COLLECTION_WARNING_TITLE=Collections will be deleted
+COLLECTION_WARNING_BODY1=The file {0} is part of one or more collections.
+COLLECTION_WARNING_BODY2=If you unshare this file the following collections will be deleted.
+UNSHARE=Unshare

gui/griffon-app/models/com/muwire/gui/CollectionWarningModel.groovy

@@ -0,0 +1,16 @@
+package com.muwire.gui
+
+import com.muwire.core.collections.FileCollection
+
+import griffon.core.artifact.GriffonModel
+import griffon.transform.Observable
+import griffon.metadata.ArtifactProviderFor
+
+@ArtifactProviderFor(GriffonModel)
+class CollectionWarningModel {
+    String[] collections
+    String fileName
+    boolean [] answer
+    UISettings settings
+    File home
+}

gui/griffon-app/views/com/muwire/gui/CollectionWarningView.groovy

@@ -0,0 +1,70 @@
+package com.muwire.gui
+
+import griffon.core.artifact.GriffonView
+
+import griffon.inject.MVCMember
+import griffon.metadata.ArtifactProviderFor
+
+import javax.swing.JCheckBox
+import javax.swing.JDialog
+import javax.swing.SwingConstants
+import javax.annotation.Nonnull
+
+import static com.muwire.gui.Translator.trans
+
+import java.awt.BorderLayout
+import java.awt.event.WindowAdapter
+import java.awt.event.WindowEvent
+
+@ArtifactProviderFor(GriffonView)
+class CollectionWarningView {
+    @MVCMember @Nonnull
+    FactoryBuilderSupport builder
+    @MVCMember @Nonnull
+    CollectionWarningModel model
+
+    JCheckBox rememberCheckbox
+    
+    def mainFrame
+    def dialog
+    def mainPanel
+    
+    void initUI() {
+        mainFrame = application.windowManager.findWindow("main-frame")
+        dialog = new JDialog(mainFrame, trans("COLLECTION_WARNING_TITLE"), true)
+        dialog.setResizable(true)
+        
+        mainPanel = builder.panel {
+            borderLayout()
+            panel(constraints : BorderLayout.NORTH) {
+                label(text : trans("COLLECTION_WARNING_BODY1", model.fileName))
+                label(text : trans("COLLECTION_WARNING_BODY2"))
+            }
+            scrollPane(constraints : BorderLayout.CENTER) {
+                list(items : model.collections)
+            }
+            panel(constraints : BorderLayout.SOUTH) {
+                rememberCheckbox = checkBox(selected : false)
+                label(text : trans("REMEMBER_DECISION"))
+                button(text : trans("UNSHARE"), unshareAction )
+                button(text : trans("CANCEL"), cancelAction)
+            }
+        }
+        
+        dialog.getContentPane().add(mainPanel)
+        dialog.pack()
+        dialog.setResizable(false)
+        dialog.setLocationRelativeTo(mainFrame)
+        dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE)
+        dialog.addWindowListener(new WindowAdapter() {
+            public void windowClosed(WindowEvent e) {
+                dialog.setVisible(false)
+                mvcGroup.destroy()
+            }
+        })
+    }
+    
+    void mvcGroupInit(Map<String,String> args) {
+        dialog.show()
+    }
+}

gui/src/main/groovy/com/muwire/gui/UISettings.groovy

@@ -18,6 +18,7 @@ class UISettings {
     boolean excludeLocalResult
     boolean showSearchHashes
     boolean closeWarning
+    boolean collectionWarning
     boolean certificateWarning
     boolean exitOnClose
     boolean clearUploads
@@ -40,6 +41,7 @@ class UISettings {
         fontSize = Integer.parseInt(props.getProperty("fontSize","12"))
         fontStyle = Integer.parseInt(props.getProperty("fontStyle", String.valueOf(Font.PLAIN)))
         closeWarning = Boolean.parseBoolean(props.getProperty("closeWarning","true"))
+        collectionWarning = Boolean.parseBoolean(props.getProperty("collectionWarning", "true"))
         certificateWarning = Boolean.parseBoolean(props.getProperty("certificateWarning","true"))
         exitOnClose = Boolean.parseBoolean(props.getProperty("exitOnClose","false"))
         clearUploads = Boolean.parseBoolean(props.getProperty("clearUploads","false"))
@@ -66,6 +68,7 @@ class UISettings {
         props.setProperty("autoFontSize", String.valueOf(autoFontSize))
         props.setProperty("fontSize", String.valueOf(fontSize))
         props.setProperty("closeWarning", String.valueOf(closeWarning))
+        props.setProperty("collectionWarning", String.valueOf(collectionWarning))
         props.setProperty("certificateWarning", String.valueOf(certificateWarning))
         props.setProperty("exitOnClose", String.valueOf(exitOnClose))
         props.setProperty("clearUploads", String.valueOf(clearUploads))