Add ability to preview filename template

app/src/main/java/com/deniscerri/ytdl/database/viewmodel/YTDLPViewModel.kt

@@ -27,4 +27,8 @@ class YTDLPViewModel(private val application: Application) : AndroidViewModel(ap
     fun getVersion(channel: String) : String {
         return ytdlpUtil.getVersion(application, channel)
     }
+
+    fun getFilenameTemplatePreview(item: DownloadItem, filenameTemplate: String) : String {
+        return ytdlpUtil.getFilenameTemplatePreview(item, filenameTemplate)
+    }
 }

app/src/main/java/com/deniscerri/ytdl/ui/downloadcard/DownloadAudioFragment.kt

@@ -32,6 +32,7 @@ import com.deniscerri.ytdl.database.viewmodel.DownloadViewModel
 import com.deniscerri.ytdl.database.viewmodel.DownloadViewModel.Type
 import com.deniscerri.ytdl.database.viewmodel.FormatViewModel
 import com.deniscerri.ytdl.database.viewmodel.ResultViewModel
+import com.deniscerri.ytdl.database.viewmodel.YTDLPViewModel
 import com.deniscerri.ytdl.util.Extensions.applyFilenameTemplateForCuts
 import com.deniscerri.ytdl.util.FileUtil
 import com.deniscerri.ytdl.util.FormatUtil
@@ -57,6 +58,7 @@ class DownloadAudioFragment(private var resultItem: ResultItem? = null, private
     private var activity: Activity? = null
     private lateinit var downloadViewModel : DownloadViewModel
     private lateinit var resultViewModel : ResultViewModel
+    private lateinit var ytdlpViewModel : YTDLPViewModel
     private lateinit var formatViewModel : FormatViewModel
     private lateinit var saveDir : TextInputLayout
     private lateinit var freeSpace : TextView
@@ -80,6 +82,7 @@ class DownloadAudioFragment(private var resultItem: ResultItem? = null, private
         activity = getActivity()
         downloadViewModel = ViewModelProvider(this)[DownloadViewModel::class.java]
         resultViewModel = ViewModelProvider(this)[ResultViewModel::class.java]
+        ytdlpViewModel = ViewModelProvider(requireActivity())[YTDLPViewModel::class.java]
         formatViewModel = ViewModelProvider(requireActivity())[FormatViewModel::class.java]
         genericAudioFormats = FormatUtil(requireContext()).getGenericAudioFormats(requireContext().resources)
         preferences = PreferenceManager.getDefaultSharedPreferences(requireContext())
@@ -310,6 +313,7 @@ class DownloadAudioFragment(private var resultItem: ResultItem? = null, private
                         UiUtil.configureAudio(
                             view,
                             requireActivity(),
+                            ytdlpViewModel,
                             listOf(downloadItem),
                             embedThumbClicked = {
                                 downloadItem.audioPreferences.embedThumb = it

app/src/main/java/com/deniscerri/ytdl/ui/downloadcard/DownloadMultipleBottomSheetDialog.kt

@@ -50,6 +50,7 @@ import com.deniscerri.ytdl.database.viewmodel.DownloadViewModel
 import com.deniscerri.ytdl.database.viewmodel.FormatViewModel
 import com.deniscerri.ytdl.database.viewmodel.HistoryViewModel
 import com.deniscerri.ytdl.database.viewmodel.ResultViewModel
+import com.deniscerri.ytdl.database.viewmodel.YTDLPViewModel
 import com.deniscerri.ytdl.receiver.ShareActivity
 import com.deniscerri.ytdl.ui.BaseActivity
 import com.deniscerri.ytdl.ui.adapter.ConfigureMultipleDownloadsAdapter
@@ -83,6 +84,7 @@ class DownloadMultipleBottomSheetDialog : BottomSheetDialogFragment(), Configure
     private lateinit var historyViewModel: HistoryViewModel
     private lateinit var commandTemplateViewModel: CommandTemplateViewModel
     private lateinit var resultViewModel: ResultViewModel
+    private lateinit var ytdlpViewModel: YTDLPViewModel
     private lateinit var formatViewModel: FormatViewModel
     private lateinit var listAdapter : ConfigureMultipleDownloadsAdapter
     private lateinit var recyclerView: RecyclerView
@@ -121,6 +123,7 @@ class DownloadMultipleBottomSheetDialog : BottomSheetDialogFragment(), Configure
         downloadViewModel = ViewModelProvider(requireActivity())[DownloadViewModel::class.java]
         historyViewModel = ViewModelProvider(requireActivity())[HistoryViewModel::class.java]
         resultViewModel = ViewModelProvider(requireActivity())[ResultViewModel::class.java]
+        ytdlpViewModel = ViewModelProvider(requireActivity())[YTDLPViewModel::class.java]
         formatViewModel = ViewModelProvider(requireActivity())[FormatViewModel::class.java]
         commandTemplateViewModel = ViewModelProvider(requireActivity())[CommandTemplateViewModel::class.java]
         sharedPreferences = PreferenceManager.getDefaultSharedPreferences(requireContext())
@@ -539,6 +542,7 @@ class DownloadMultipleBottomSheetDialog : BottomSheetDialogFragment(), Configure
                                     UiUtil.configureAudio(
                                         sheetView,
                                         requireActivity(),
+                                        ytdlpViewModel,
                                         items,
                                         embedThumbClicked = {enabled ->
                                             items.forEach {
@@ -631,6 +635,7 @@ class DownloadMultipleBottomSheetDialog : BottomSheetDialogFragment(), Configure
                                     UiUtil.configureVideo(
                                         sheetView,
                                         requireActivity(),
+                                        ytdlpViewModel,
                                         items,
                                         embedSubsClicked = {checked ->
                                             items.forEach { it.videoPreferences.embedSubs = checked }

app/src/main/java/com/deniscerri/ytdl/ui/downloadcard/DownloadVideoFragment.kt

@@ -32,6 +32,7 @@ import com.deniscerri.ytdl.database.viewmodel.DownloadViewModel
 import com.deniscerri.ytdl.database.viewmodel.DownloadViewModel.Type
 import com.deniscerri.ytdl.database.viewmodel.FormatViewModel
 import com.deniscerri.ytdl.database.viewmodel.ResultViewModel
+import com.deniscerri.ytdl.database.viewmodel.YTDLPViewModel
 import com.deniscerri.ytdl.util.Extensions.applyFilenameTemplateForCuts
 import com.deniscerri.ytdl.util.FileUtil
 import com.deniscerri.ytdl.util.FormatUtil
@@ -59,6 +60,7 @@ class DownloadVideoFragment(private var resultItem: ResultItem? = null, private
     private lateinit var downloadViewModel : DownloadViewModel
     private lateinit var formatViewModel : FormatViewModel
     private lateinit var resultViewModel: ResultViewModel
+    private lateinit var ytdlpViewModel: YTDLPViewModel
     private lateinit var preferences: SharedPreferences
     private lateinit var shownFields: List<String>
     lateinit var title : TextInputLayout
@@ -85,6 +87,7 @@ class DownloadVideoFragment(private var resultItem: ResultItem? = null, private
         downloadViewModel = ViewModelProvider(this)[DownloadViewModel::class.java]
         resultViewModel = ViewModelProvider(this)[ResultViewModel::class.java]
         formatViewModel = ViewModelProvider(requireActivity())[FormatViewModel::class.java]
+        ytdlpViewModel = ViewModelProvider(requireActivity())[YTDLPViewModel::class.java]
         val formatUtil = FormatUtil(requireContext())
         genericVideoFormats = formatUtil.getGenericVideoFormats(requireContext().resources)
         genericAudioFormats = formatUtil.getGenericAudioFormats(requireContext().resources)
@@ -353,6 +356,7 @@ class DownloadVideoFragment(private var resultItem: ResultItem? = null, private
                         UiUtil.configureVideo(
                             view,
                             requireActivity(),
+                            ytdlpViewModel,
                             listOf(downloadItem),
                             embedSubsClicked = {
                                 downloadItem.videoPreferences.embedSubs = it

app/src/main/java/com/deniscerri/ytdl/ui/more/settings/FolderSettingsFragment.kt

@@ -174,7 +174,7 @@ class FolderSettingsFragment : BaseSettingsFragment() {
         audioFilenameTemplate?.summary = preferences.getString("file_name_template_audio", "%(uploader).30B - %(title).170B")
 
         videoFilenameTemplate?.setOnPreferenceClickListener {
-            UiUtil.showFilenameTemplateDialog(requireActivity(), videoFilenameTemplate?.summary.toString() ?: "", "${getString(R.string.file_name_template)} [${getString(R.string.video)}]") {
+            UiUtil.showFilenameTemplateDialog(requireActivity(),videoFilenameTemplate?.summary.toString() ?: "", "${getString(R.string.file_name_template)} [${getString(R.string.video)}]") {
                 editor.putString("file_name_template", it).apply()
                 videoFilenameTemplate?.summary = it
             }

app/src/main/java/com/deniscerri/ytdl/util/UiUtil.kt

@@ -17,6 +17,7 @@ import android.content.SharedPreferences
 import android.net.Uri
 import android.os.Build
 import android.os.Environment
+import android.os.Looper
 import android.text.Editable
 import android.text.TextWatcher
 import android.text.format.DateFormat
@@ -35,6 +36,7 @@ import android.widget.CheckBox
 import android.widget.EditText
 import android.widget.LinearLayout
 import android.widget.PopupMenu
+import android.widget.ProgressBar
 import android.widget.RadioButton
 import android.widget.TextView
 import android.widget.Toast
@@ -105,6 +107,7 @@ import java.io.File
 import java.text.SimpleDateFormat
 import java.util.Calendar
 import java.util.Locale
+import java.util.logging.Handler
 
 
 object UiUtil {
@@ -1302,6 +1305,7 @@ object UiUtil {
     fun configureVideo(
         view: View,
         context: Activity,
+        ytdlpViewModel: YTDLPViewModel,
         items: List<DownloadItem>,
         embedSubsClicked : (Boolean) -> Unit,
         addChaptersClicked: (Boolean) -> Unit,
@@ -1764,7 +1768,8 @@ object UiUtil {
             }else {
                 ""
             }
-            showFilenameTemplateDialog(context, currentFilename) {
+            val itemContext = if (items.size == 1) items.first() else null
+            showFilenameTemplateDialog(context, currentFilename, ytdlpViewModel = ytdlpViewModel, itemContext = itemContext) {
                 filenameTemplateSet(it)
             }
         }
@@ -1791,6 +1796,7 @@ object UiUtil {
     fun configureAudio(
         view: View,
         context: Activity,
+        ytdlpViewModel: YTDLPViewModel,
         items: List<DownloadItem>,
         embedThumbClicked: (Boolean) -> Unit,
         cropThumbClicked: (Boolean) -> Unit,
@@ -1867,7 +1873,8 @@ object UiUtil {
             }else {
                 ""
             }
-            showFilenameTemplateDialog(context, currentFilename) {
+            val itemContext = if (items.size == 1) items.first() else null
+            showFilenameTemplateDialog(context, currentFilename, ytdlpViewModel = ytdlpViewModel, itemContext = itemContext) {
                 filenameTemplateSet(it)
             }
         }
@@ -2103,7 +2110,7 @@ object UiUtil {
     }
 
     @SuppressLint("RestrictedApi")
-    fun showFilenameTemplateDialog(context: Activity, currentFilename: String, dialogTitle: String = context.getString(R.string.file_name_template), filenameSelected: (f: String) -> Unit){
+    fun showFilenameTemplateDialog(context: Activity, currentFilename: String, dialogTitle: String = context.getString(R.string.file_name_template), ytdlpViewModel: YTDLPViewModel? = null, itemContext: DownloadItem? = null, filenameSelected: (f: String) -> Unit){
         val builder = MaterialAlertDialogBuilder(context)
         builder.setTitle(dialogTitle)
         val view = context.layoutInflater.inflate(R.layout.filename_template_dialog, null)
@@ -2174,6 +2181,42 @@ object UiUtil {
             myTemplatesView.isVisible = true
         }
 
+        view.findViewById<MaterialCardView>(R.id.filename_template_preview).isVisible = itemContext != null
+        val previewTemplateBtn = view.findViewById<MaterialButton>(R.id.filename_template_preview_btn)
+        val previewTemplateLoading = view.findViewById<ProgressBar>(R.id.filename_template_preview_loading)
+        val previewTemplateText = view.findViewById<TextView>(R.id.filename_template_preview_text)
+
+        previewTemplateBtn.setOnClickListener {
+            previewTemplateLoading.isVisible = true
+            previewTemplateBtn.isVisible = false
+
+            CoroutineScope(Dispatchers.IO).launch {
+                val preview = ytdlpViewModel!!.getFilenameTemplatePreview(itemContext!!, editText.text.toString())
+
+                withContext(Dispatchers.Main) {
+                    previewTemplateLoading.isVisible = false
+                    previewTemplateText.isVisible = true
+                    previewTemplateText.text = preview
+                }
+            }
+        }
+
+        editText.addTextChangedListener(object : TextWatcher {
+            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
+                previewTemplateText.isVisible = false
+                previewTemplateLoading.isVisible = false
+                previewTemplateBtn.isVisible = true
+            }
+
+            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {}
+            override fun afterTextChanged(s: Editable?) {}
+        })
+
+        if (currentFilename.isNotBlank() && itemContext != null) {
+            previewTemplateBtn.isVisible = true
+            previewTemplateBtn.performClick()
+        }
+
         CoroutineScope(Dispatchers.IO).launch {
             //handle personal template chips
             val mychips = mutableListOf<Chip>()
@@ -2220,7 +2263,6 @@ object UiUtil {
                 chips.add(tmp)
             }
 
-
             withContext(Dispatchers.Main){
                 if (mychips.isNotEmpty()){
                     myTemplatesView.isVisible = true

app/src/main/java/com/deniscerri/ytdl/util/extractors/ytdlp/YTDLPUtil.kt

@@ -41,6 +41,8 @@ import org.json.JSONArray
 import org.json.JSONObject
 import java.io.File
 import java.lang.reflect.Type
+import java.security.MessageDigest
+import java.util.Base64
 import java.util.Locale
 import java.util.StringJoiner
 import java.util.UUID
@@ -118,6 +120,7 @@ class YTDLPUtil(private val context: Context, private val commandTemplateDao: Co
             }else{
                 request = YoutubeDLRequest(query)
             }
+            request.addWriteInfoJson(query)
         }else{
             request = YoutubeDLRequest(emptyList())
             when (searchEngine){
@@ -374,6 +377,7 @@ class YTDLPUtil(private val context: Context, private val commandTemplateDao: Co
         return parseYTDLPListResults(results)
     }
 
+
     suspend fun getFormatsForAll(urls: List<String>, progress: (progress: ResultViewModel.MultipleFormatProgress) -> Unit) : Result<MutableList<MutableList<Format>>>  {
         val formatCollection = mutableListOf<MutableList<Format>>()
 
@@ -456,7 +460,6 @@ class YTDLPUtil(private val context: Context, private val commandTemplateDao: Co
         return Result.success(formatCollection)
     }
 
-
     fun getFormats(url: String) : List<Format> {
         val request = YoutubeDLRequest(url)
         request.addOption("--print", "%(formats)s")
@@ -583,7 +586,51 @@ class YTDLPUtil(private val context: Context, private val commandTemplateDao: Co
             return Result.failure(e)
         }
     }
+    fun getVersion(context: Context, channel: String) : String {
+        if (listOf("stable", "nightly", "master").contains(channel)) {
+            return YoutubeDL.version(context) ?: ""
+        }
 
+        val req = YoutubeDLRequest(emptyList())
+        req.addOption("--version")
+        return YoutubeDL.getInstance().execute(req).out.trim()
+    }
+
+    @OptIn(ExperimentalStdlibApi::class)
+    private fun YoutubeDLRequest.addWriteInfoJson(url: String) {
+        val cachePath = "${FileUtil.getCachePath(context)}infojsons"
+        val infoJsonName = MessageDigest.getInstance("MD5").digest(url.toByteArray()).toHexString()
+        this.addCommands(listOf("--print-to-file", "video:%()#j", "${cachePath}/${infoJsonName}.info.json"))
+    }
+
+    @OptIn(ExperimentalStdlibApi::class)
+    private fun getInfoJsonPath(url: String): String? {
+        val cachePath = "${FileUtil.getCachePath(context)}infojsons"
+        val infoJsonName = MessageDigest.getInstance("MD5").digest(url.toByteArray()).toHexString()
+        val infoJsonFile = File(cachePath).walkTopDown().firstOrNull { it.name == "${infoJsonName}.info.json" }
+        return infoJsonFile?.absolutePath
+    }
+
+    fun getFilenameTemplatePreview(item: DownloadItem, filenameTemplate: String): String {
+        item.customFileNameTemplate = filenameTemplate
+        val request = buildYoutubeDLRequest(item)
+        request.addOption("--print", "%(filename)s")
+        request.addOption("--skip-download")
+
+        val infoJsonPath = getInfoJsonPath(item.url)
+        if (infoJsonPath == null) {
+            request.addWriteInfoJson(item.url)
+        } else {
+            request.addOption("--load-info-json", infoJsonPath)
+        }
+
+        try {
+            val response = YoutubeDL.execute(request)
+            return response.out.replace(FileUtil.getCachePath(context) + "${item.id}/", "").trim()
+        } catch (ex: Exception) {
+            return ex.message ?: ""
+        }
+    }
 
     fun parseYTDLRequestString(request : YoutubeDLRequest) : String {
         val arr = request.buildCommand().toMutableList()
@@ -616,15 +663,6 @@ class YTDLPUtil(private val context: Context, private val commandTemplateDao: Co
         }
     }
 
-    fun getVersion(context: Context, channel: String) : String {
-        if (listOf("stable", "nightly", "master").contains(channel)) {
-            return YoutubeDL.version(context) ?: ""
-        }
-
-        val req = YoutubeDLRequest(emptyList())
-        req.addOption("--version")
-        return YoutubeDL.getInstance().execute(req).out.trim()
-    }
 
     private fun YoutubeDLRequest.setYoutubeExtractorArgs(url: String?) {
         val extractorArgs = mutableListOf<String>()
@@ -858,11 +896,6 @@ class YTDLPUtil(private val context: Context, private val commandTemplateDao: Co
             request.addOption("--proxy", proxy)
         }
 
-        val updateYTDLP = sharedPreferences.getBoolean("update_ytdlp_while_downloading", false)
-        if (updateYTDLP) {
-            request.addOption("-U")
-        }
-
         val keepCache = sharedPreferences.getBoolean("keep_cache", false)
         if(keepCache){
             request.addOption("--keep-fragments")

app/src/main/java/com/deniscerri/ytdl/work/DownloadWorker.kt

@@ -169,6 +169,12 @@ class DownloadWorker(
                     val noCache = writtenPath || (!sharedPreferences.getBoolean("cache_downloads", true) && File(FileUtil.formatPath(downloadItem.downloadPath)).canWrite())
 
                     val request = ytdlpUtil.buildYoutubeDLRequest(downloadItem)
+
+                    val updateYTDLP = sharedPreferences.getBoolean("update_ytdlp_while_downloading", false)
+                    if (updateYTDLP) {
+                        request.addOption("-U")
+                    }
+
                     downloadItem.status = DownloadRepository.Status.Active.toString()
                     CoroutineScope(Dispatchers.IO).launch {
                         delay(1500)
@@ -375,7 +381,6 @@ class DownloadWorker(
                             FileUtil.deleteFile("${cachePath}/${infoJsonName}.info.json")
                         }
 
-
                         if (logDownloads){
                             logRepo.update(it.message ?: "", logItem.id)
                         }else{

app/src/main/res/layout/filename_template_dialog.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.core.widget.NestedScrollView
+<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
+    xmlns:tools="http://schemas.android.com/tools"
     android:padding="10dp"
     android:layout_height="wrap_content">
 
@@ -31,6 +31,46 @@
 
         </com.google.android.material.textfield.TextInputLayout>
 
+        <com.google.android.material.card.MaterialCardView
+            android:id="@+id/filename_template_preview"
+            android:visibility="gone"
+            tools:visibility="visible"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginHorizontal="10dp">
+
+            <TextView
+                android:id="@+id/filename_template_preview_text"
+                android:layout_width="match_parent"
+                android:visibility="gone"
+                tools:visibility="visible"
+                android:gravity="center"
+                android:textAlignment="textStart"
+                android:fontFamily="monospace"
+                android:layout_margin="10dp"
+                android:layout_height="match_parent" />
+
+            <ProgressBar
+                android:id="@+id/filename_template_preview_loading"
+                android:visibility="gone"
+                android:layout_width="20dp"
+                android:layout_margin="10dp"
+                android:layout_gravity="center"
+                android:indeterminate="true"
+                android:layout_height="20dp" />
+
+            <com.google.android.material.button.MaterialButton
+                style="@style/Widget.Material3.Button.TextButton"
+                android:id="@+id/filename_template_preview_btn"
+                android:visibility="gone"
+                tools:visibility="visible"
+                android:layout_width="match_parent"
+                android:layout_gravity="center"
+                android:text="@string/preview_filename"
+                android:layout_height="match_parent" />
+
+        </com.google.android.material.card.MaterialCardView>
+
         <LinearLayout
             android:id="@+id/mytemplates"
             android:visibility="gone"

app/src/main/res/values/strings.xml

@@ -504,4 +504,5 @@
     <string name="use_original_url_playlist_summary">Use playlist url given by user instead of the playlist_webpage_url tag from the json dump</string>
     <string name="update_ytdlp_while_downloading">Update yt-dlp while downloading</string>
     <string name="update_ytdlp_while_downloading_summary">Add -U to yt-dlp to update it to latest before downloading</string>
+    <string name="preview_filename">Preview filename</string>
 </resources>