From 5aefb3bc59bf95ea284b976538b8bd92a5e4bd99 Mon Sep 17 00:00:00 2001
From: Benjamin <73490201+BenjaminHalko@users.noreply.github.com>
Date: Mon, 16 Oct 2023 12:48:51 -0700
Subject: [PATCH] fix: hide patch button (#1284)

---
 .../ui/screen/PatchesSelectorScreen.kt        | 41 +++++++++++++------
 .../ui/viewmodel/PatchesSelectorViewModel.kt  | 14 +++++++
 2 files changed, 43 insertions(+), 12 deletions(-)

diff --git a/app/src/main/java/app/revanced/manager/ui/screen/PatchesSelectorScreen.kt b/app/src/main/java/app/revanced/manager/ui/screen/PatchesSelectorScreen.kt
index 47119f4b36..4ac41b063e 100644
--- a/app/src/main/java/app/revanced/manager/ui/screen/PatchesSelectorScreen.kt
+++ b/app/src/main/java/app/revanced/manager/ui/screen/PatchesSelectorScreen.kt
@@ -44,6 +44,7 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
@@ -56,6 +57,7 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog
 import androidx.compose.ui.window.DialogProperties
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import androidx.lifecycle.viewModelScope
 import app.revanced.manager.R
 import app.revanced.manager.domain.manager.PreferencesManager
 import app.revanced.manager.patcher.patch.PatchInfo
@@ -91,7 +93,10 @@ fun PatchesSelectorScreen(
         mutableStateOf(null)
     }
     var showBottomSheet by rememberSaveable { mutableStateOf(false) }
-
+    var showPatchButton by remember { mutableStateOf(true) }
+    LaunchedEffect(Unit) {
+        showPatchButton = vm.isSelectionNotEmpty()
+    }
     if (showBottomSheet) {
         ModalBottomSheet(
             onDismissRequest = {
@@ -222,10 +227,17 @@ fun PatchesSelectorScreen(
                         if (vm.selectionWarningEnabled) {
                             vm.pendingSelectionAction = {
                                 vm.togglePatch(uid, patch)
+                                vm.viewModelScope.launch {
+                                    showPatchButton = vm.isSelectionNotEmpty()
+                                }
                             }
                         } else {
                             vm.togglePatch(uid, patch)
+                            vm.viewModelScope.launch {
+                                showPatchButton = vm.isSelectionNotEmpty()
+                            }
                         }
+
                     },
                     supported = supported
                 )
@@ -296,6 +308,7 @@ fun PatchesSelectorScreen(
         }
     }
 
+
     Scaffold(
         topBar = {
             AppTopBar(
@@ -319,18 +332,22 @@ fun PatchesSelectorScreen(
             )
         },
         floatingActionButton = {
-            ExtendedFloatingActionButton(
-                text = { Text(stringResource(R.string.patch)) },
-                icon = { Icon(Icons.Default.Build, null) },
-                onClick = {
-                    // TODO: only allow this if all required options have been set.
-                    composableScope.launch {
-                        val selection = vm.getSelection()
-                        vm.saveSelection(selection).join()
-                        onPatchClick(selection, vm.getOptions())
+            if(showPatchButton) {
+                ExtendedFloatingActionButton(
+                    text = {
+                        Text(stringResource(R.string.patch))
+                    },
+                    icon = { Icon(Icons.Default.Build, null) },
+                    onClick = {
+                        // TODO: only allow this if all required options have been set.
+                        composableScope.launch {
+                            val selection = vm.getSelection()
+                            vm.saveSelection(selection).join()
+                            onPatchClick(selection, vm.getOptions())
+                        }
                     }
-                }
-            )
+                )
+            }
         }
     ) { paddingValues ->
         Column(
diff --git a/app/src/main/java/app/revanced/manager/ui/viewmodel/PatchesSelectorViewModel.kt b/app/src/main/java/app/revanced/manager/ui/viewmodel/PatchesSelectorViewModel.kt
index 036bc6133a..8e4f7246c1 100644
--- a/app/src/main/java/app/revanced/manager/ui/viewmodel/PatchesSelectorViewModel.kt
+++ b/app/src/main/java/app/revanced/manager/ui/viewmodel/PatchesSelectorViewModel.kt
@@ -175,6 +175,20 @@ class PatchesSelectorViewModel(
         }
     }
 
+    private suspend fun patchesAvailable(bundle: BundleInfo): List<PatchInfo> {
+        val patches = (bundle.supported + bundle.universal).toMutableList()
+        val removeUnsupported = !allowExperimental.get()
+        if (!removeUnsupported) patches += bundle.unsupported
+        return patches
+    }
+
+    suspend fun isSelectionNotEmpty() =
+        bundlesFlow.first().any { bundle ->
+            patchesAvailable(bundle).any { patch ->
+                isSelected(bundle.uid, patch)
+            }
+        }
+
     private fun getOrCreateSelection(bundle: Int) =
         explicitPatchesSelection.getOrPut(bundle, ::mutableStateMapOf)