Swipe to Refresh

owncloudApp/src/main/java/com/owncloud/android/dependecyinjection/ViewModelModule.kt

@@ -75,5 +75,5 @@ val viewModelModule = module {
     viewModel { PreviewImageViewModel(get(), get(), get()) }
     viewModel { FileDetailsViewModel(get(), get(), get(), get(), get()) }
     viewModel { FileOperationViewModel(get(), get(), get(), get(), get(), get()) }
-    viewModel { MainFileListViewModel(get(), get()) }
+    viewModel { MainFileListViewModel(get(), get(), get()) }
 }

owncloudApp/src/main/java/com/owncloud/android/extensions/SwipeRefreshExt.kt

@@ -0,0 +1,27 @@
+/**
+ * ownCloud Android client application
+ *
+ * @author Fernando Sanz Velasco
+ * Copyright (C) 2021 ownCloud GmbH.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ *
+ * 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+package com.owncloud.android.extensions
+
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+
+fun SwipeRefreshLayout.cancel() {
+    this.isRefreshing = false
+}

owncloudApp/src/main/java/com/owncloud/android/presentation/adapters/filelist/FileListAdapter.kt

@@ -31,61 +31,92 @@ import androidx.recyclerview.widget.DiffUtil
 import androidx.recyclerview.widget.RecyclerView
 import com.owncloud.android.R
 import com.owncloud.android.databinding.ItemFileListBinding
+import com.owncloud.android.databinding.ListFooterBinding
 import com.owncloud.android.domain.files.model.OCFile
+import com.owncloud.android.domain.files.model.OCFooterFile
 import com.owncloud.android.extensions.setPicture
 import com.owncloud.android.presentation.diffutils.FileListDiffCallback
 import com.owncloud.android.utils.DisplayUtils
 import com.owncloud.android.utils.MimetypeIconUtil
 
 class FileListAdapter(
     private val context: Context,
-    private val listener: FileListAdapterListener
-) : RecyclerView.Adapter<FileListAdapter.ViewHolder>() {
+    private val isShowingJustFolders: Boolean,
+    private val listener: FileListAdapterListener,
+) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
 
-    private val files = mutableListOf<OCFile>()
+    private val files = mutableListOf<Any>()
+    private lateinit var viewHolder: RecyclerView.ViewHolder
+
+    private val TYPE_ITEMS = 0
+    private val TYPE_FOOTER = 1
 
     fun updateFileList(filesToAdd: List<OCFile>) {
         val diffUtilCallback = FileListDiffCallback(oldList = files, newList = filesToAdd)
         val diffResult = DiffUtil.calculateDiff(diffUtilCallback)
         files.clear()
         files.addAll(filesToAdd)
+        if (filesToAdd.isNotEmpty()) {
+            files.add(OCFooterFile(manageListOfFilesAndGenerateText(filesToAdd)))
+        }
         diffResult.dispatchUpdatesTo(this)
     }
 
-    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
-        val binding = ItemFileListBinding.inflate(LayoutInflater.from(parent.context), parent, false)
-
-        return ViewHolder(binding)
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
+        when (viewType) {
+            TYPE_ITEMS -> {
+                val binding = ItemFileListBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+                viewHolder = ViewHolder(binding)
+            }
+            TYPE_FOOTER -> {
+                val binding = ListFooterBinding.inflate(LayoutInflater.from(parent.context), parent, false)
+                viewHolder = FooterViewHolder(binding)
+            }
+        }
+        return viewHolder
     }
 
     override fun getItemCount(): Int = files.size
 
     override fun getItemId(position: Int): Long = position.toLong()
 
-    fun getItem(position: Int): Any? {
-        return if (files.size <= position) {
-            null
-        } else files[position]
+    override fun getItemViewType(position: Int): Int {
+        return if (position == files.size.minus(1)) {
+            TYPE_FOOTER
+        } else {
+            TYPE_ITEMS
+        }
     }
 
-    override fun getItemViewType(position: Int): Int = position
-
-    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
-        with(holder) {
-            with(files[position]) {
-                binding.Filename.text = this.fileName
-                binding.fileListSize.text = DisplayUtils.bytesToHumanReadable(this.length, context)
-                binding.fileListLastMod.text = DisplayUtils.getRelativeTimestamp(context, this.modificationTimestamp)
-                binding.localFileIndicator.isVisible = false //TODO Modify in the future, when we start the synchronization task.
-                binding.customCheckbox.isVisible = false //TODO Modify in the future, when we start the multi selection task.
-                binding.thumbnail.let {
-                    it.tag = this.id
-                    getThumbnailPicture(imageView = it, file = this)
+    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
+        when (holder.itemViewType) {
+            TYPE_ITEMS -> {
+                with(holder as ViewHolder) {
+                    with(files[position] as OCFile) {
+                        binding.Filename.text = this.fileName
+                        binding.fileListSize.text = DisplayUtils.bytesToHumanReadable(this.length, context)
+                        binding.fileListLastMod.text = DisplayUtils.getRelativeTimestamp(context, this.modificationTimestamp)
+                        binding.localFileIndicator.isVisible = false //TODO Modify in the future, when we start the synchronization task.
+                        binding.customCheckbox.isVisible = false //TODO Modify in the future, when we start the multi selection task.
+                        binding.thumbnail.let {
+                            it.tag = this.id
+                            getThumbnailPicture(imageView = it, file = this)
+                        }
+                        //TODO Check this with FileListListAdapter.java and its viewType (LIST or GRID)
+                        getSharedIcon(imageView = binding.sharedIcon, file = this)
+                        binding.root.setOnClickListener {
+                            listener.clickItem(this)
+                        }
+                    }
                 }
-                //TODO Check this with FileListListAdapter.java and its viewType (LIST or GRID)
-                getSharedIcon(imageView = binding.sharedIcon, file = this)
-                binding.root.setOnClickListener {
-                    listener.clickItem(this)
+            }
+            TYPE_FOOTER -> {
+                if (!isShowingJustFolders) {
+                    with(holder as FooterViewHolder) {
+                        with(files[position] as OCFooterFile) {
+                            binding.footerText.text = this.text
+                        }
+                    }
                 }
             }
         }
@@ -119,9 +150,75 @@ class FileListAdapter(
         }
     }
 
+    private fun manageListOfFilesAndGenerateText(list: List<OCFile>): String {
+        var filesCount = 0
+        var foldersCount = 0
+        val count: Int = list.size
+        var file: OCFile
+        for (i in 0 until count) {
+            file = list[i]
+            if (file.isFolder) {
+                foldersCount++
+            } else {
+                if (!file.isHidden) {
+                    filesCount++
+                }
+            }
+        }
+
+        return generateFooterText(filesCount, foldersCount)
+    }
+
+    private fun generateFooterText(filesCount: Int, foldersCount: Int): String {
+        when {
+            filesCount <= 0 -> {
+                return when {
+                    foldersCount <= 0 -> {
+                        ""
+                    }
+                    foldersCount == 1 -> {
+                        context.getString(R.string.file_list__footer__folder)
+                    }
+                    else -> { // foldersCount > 1
+                        context.getString(R.string.file_list__footer__folders, foldersCount)
+                    }
+                }
+            }
+            filesCount == 1 -> {
+                return when {
+                    foldersCount <= 0 -> {
+                        context.getString(R.string.file_list__footer__file)
+                    }
+                    foldersCount == 1 -> {
+                        context.getString(R.string.file_list__footer__file_and_folder)
+                    }
+                    else -> { // foldersCount > 1
+                        context.getString(R.string.file_list__footer__file_and_folders, foldersCount)
+                    }
+                }
+            }
+            else -> {    // filesCount > 1
+                return when {
+                    foldersCount <= 0 -> {
+                        context.getString(R.string.file_list__footer__files, filesCount)
+                    }
+                    foldersCount == 1 -> {
+                        context.getString(R.string.file_list__footer__files_and_folder, filesCount)
+                    }
+                    else -> { // foldersCount > 1
+                        context.getString(
+                            R.string.file_list__footer__files_and_folders, filesCount, foldersCount
+                        )
+                    }
+                }
+            }
+        }
+    }
+
     interface FileListAdapterListener {
         fun clickItem(ocFile: OCFile)
     }
 
     inner class ViewHolder(val binding: ItemFileListBinding) : RecyclerView.ViewHolder(binding.root)
+    inner class FooterViewHolder(val binding: ListFooterBinding) : RecyclerView.ViewHolder(binding.root)
 }

owncloudApp/src/main/java/com/owncloud/android/presentation/diffutils/FileListDiffCallback.kt

@@ -22,20 +22,37 @@ package com.owncloud.android.presentation.diffutils
 
 import androidx.recyclerview.widget.DiffUtil
 import com.owncloud.android.domain.files.model.OCFile
+import com.owncloud.android.domain.files.model.OCFooterFile
 
-class FileListDiffCallback(private val oldList: List<OCFile>, private val newList: List<OCFile>) : DiffUtil.Callback() {
+class FileListDiffCallback(private val oldList: List<Any>, private val newList: List<Any>) : DiffUtil.Callback() {
 
     override fun getOldListSize(): Int = oldList.size
 
     override fun getNewListSize(): Int = newList.size
 
     override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
-        return oldList[oldItemPosition].id === newList[newItemPosition].id
-    }
+        val oldItem = oldList[oldItemPosition]
+        val newItem = newList[newItemPosition]
+
+        if (oldItem is Unit && newItem is Unit) {
+            return true
+        }
+
+        if (oldItem is Boolean && newItem is Boolean) {
+            return true
+        }
 
-    override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
-        val (_, value, name) = oldList[oldItemPosition]
-        val (_, value1, name1) = newList[newItemPosition]
-        return name == name1 && value == value1
+        if (oldItem is OCFile && newItem is OCFile) {
+            return oldItem.id == newItem.id
+        }
+
+        if (oldItem is OCFooterFile && newItem is OCFooterFile) {
+            return oldItem.text == newItem.text
+        }
+
+        return false
     }
+
+    override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean =
+        oldList[oldItemPosition] == newList[newItemPosition]
 }

owncloudApp/src/main/java/com/owncloud/android/presentation/ui/files/filelist/MainFileListFragment.kt

@@ -29,6 +29,7 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import com.owncloud.android.databinding.MainFileListFragmentBinding
 import com.owncloud.android.domain.files.model.OCFile
 import com.owncloud.android.domain.utils.Event
+import com.owncloud.android.extensions.cancel
 import com.owncloud.android.presentation.adapters.filelist.FileListAdapter
 import com.owncloud.android.presentation.observers.EmptyDataObserver
 import com.owncloud.android.presentation.onSuccess
@@ -59,7 +60,7 @@ class MainFileListFragment : Fragment() {
 
     private fun initViews() {
         //Set RecyclerView and its adapter.
-        fileListAdapter = FileListAdapter(context = requireContext(), listener = object :
+        fileListAdapter = FileListAdapter(context = requireContext(), isShowingJustFolders = isShowingJustFolders(), listener = object :
             FileListAdapter.FileListAdapterListener {
             override fun clickItem(ocFile: OCFile) {
                 if (ocFile.isFolder) {
@@ -70,35 +71,24 @@ class MainFileListFragment : Fragment() {
                 }
             }
 
-        } )
+        })
         binding.recyclerViewMainFileList.apply {
             layoutManager = LinearLayoutManager(requireContext())
             adapter = fileListAdapter
         }
+
+        // Set Swipe to refresh and its listener
+        binding.swipeRefreshMainFileList.setOnRefreshListener { mainFileListViewModel.refreshDirectory() }
     }
 
     private fun subscribeToViewModels() {
-        //Observe the action of retrieving the list of files from BBDD.
+        // Observe the action of retrieving the list of files from DB.
         mainFileListViewModel.getFilesListStatusLiveData.observe(viewLifecycleOwner, Event.EventObserver {
             it.onSuccess { data ->
                 val files = data ?: emptyList()
                 fileListAdapter.updateFileList(filesToAdd = files)
                 registerListAdapterDataObserver()
-                mainFileListViewModel.manageListOfFiles(files)
-            }
-        })
-
-        mainFileListViewModel.numberOfFilesPerType.observe(viewLifecycleOwner, Event.EventObserver {
-            it.onSuccess { data ->
-                if (!isShowingJustFolders()) {
-                    mainFileListViewModel.generateFooterText(data!!.first, data.second)
-                }
-            }
-        })
-
-        mainFileListViewModel.footerText.observe(viewLifecycleOwner, Event.EventObserver {
-            it.onSuccess { data ->
-                setFooterText(data)
+                binding.swipeRefreshMainFileList.cancel()
             }
         })
     }
@@ -107,16 +97,6 @@ class MainFileListFragment : Fragment() {
         mainFileListViewModel.listDirectory(directory = directory)
     }
 
-    private fun setFooterText(text: String?) {
-        if (text?.isNotEmpty() == true) {
-            binding.footerMainFileList.footerText.text = text
-            // TODO Manage footer enable/disable options
-            //setFooterEnabled(true)
-        } else {
-            //setFooterEnabled(false)
-        }
-    }
-
     private fun isShowingJustFolders(): Boolean {
         val args = arguments
         return args != null && args.getBoolean(ARG_JUST_FOLDERS, false)