Distinct OSS lib models by their names (#3266)

* Mark ossLibraries non-null

* Distinct oss lib models

* Cleanup

lawnchair/src/app/lawnchair/ui/preferences/PreferenceInteractor.kt

@@ -20,7 +20,7 @@ import app.lawnchair.ossnotices.OssLibrary
 import kotlinx.coroutines.flow.StateFlow
 
 sealed interface PreferenceInteractor {
-    val ossLibraries: StateFlow<List<OssLibrary>?>
+    val ossLibraries: StateFlow<List<OssLibrary>>
     val iconPacks: StateFlow<List<IconPackInfo>>
     val themedIconPacks: StateFlow<List<IconPackInfo>>
 }

lawnchair/src/app/lawnchair/ui/preferences/PreferenceViewModel.kt

@@ -22,6 +22,7 @@ import androidx.core.content.ContextCompat
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.viewModelScope
 import app.lawnchair.icons.CustomAdaptiveIconDrawable
+import app.lawnchair.ossnotices.OssLibrary
 import app.lawnchair.ossnotices.getOssLibraries
 import com.android.launcher3.R
 import kotlinx.coroutines.Dispatchers
@@ -31,6 +32,7 @@ import kotlinx.coroutines.flow.flowOn
 import kotlinx.coroutines.flow.stateIn
 import app.lawnchair.util.getPackageVersionCode
 import app.lawnchair.util.Constants.LAWNICONS_PACKAGE_NAME
+import kotlinx.coroutines.flow.StateFlow
 
 private val iconPackIntents = listOf(
     Intent("com.novalauncher.THEME"),
@@ -106,10 +108,11 @@ class PreferenceViewModel(private val app: Application) : AndroidViewModel(app),
         .flowOn(Dispatchers.Default)
         .stateIn(viewModelScope, SharingStarted.Lazily, listOf())
 
-    override val ossLibraries = flow {
-        val ossLibraries = app.getOssLibraries(thirdPartyLicenseMetadataId = R.raw.third_party_license_metadata)
+    override val ossLibraries: StateFlow<List<OssLibrary>> = flow {
+        val ossLibraries = app.getOssLibraries(R.raw.third_party_license_metadata)
+            .distinctBy { it.name }
         emit(ossLibraries)
     }
         .flowOn(Dispatchers.Default)
-        .stateIn(viewModelScope, SharingStarted.Lazily, null)
+        .stateIn(viewModelScope, SharingStarted.Lazily, emptyList())
 }

lawnchair/src/app/lawnchair/ui/preferences/about/acknowledgements/Acknowledgements.kt

@@ -96,7 +96,7 @@ fun OssLibraryItem(ossLibrary: OssLibrary, index: Int) {
 @Composable
 fun NoticePage(index: Int) {
     val ossLibraries by LocalPreferenceInteractor.current.ossLibraries.collectAsState()
-    val ossLibrary = ossLibraries?.get(index)
+    val ossLibrary = ossLibraries.getOrNull(index)
     val dataState = ossLibrary?.let { loadNotice(ossLibrary = it) }
     val data = dataState?.value