feat: search support for tesseract download menu (closes #434)

app/src/main/java/com/bnyro/translate/ui/components/SearchAppBar.kt

@@ -75,7 +75,7 @@ fun SearchAppBar(
             Text(title)
         },
         actions = {
-            Crossfade(isSearchViewVisible) {
+            Crossfade(isSearchViewVisible, label = "search-bar-crossfade") {
                 when (it) {
                     true -> {
                         Row(

app/src/main/java/com/bnyro/translate/ui/models/TessModel.kt

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2024 You Apps
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+package com.bnyro.translate.ui.models
+
+import android.content.Context
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.bnyro.translate.obj.TessLanguage
+import com.bnyro.translate.util.TessHelper
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+class TessModel: ViewModel() {
+    var availableLanguages by mutableStateOf(emptyList<TessLanguage>())
+    var downloadedLanguages by mutableStateOf(emptyList<String>())
+    var notYetDownloadedLanguages by mutableStateOf(emptyList<TessLanguage>())
+
+    fun init(context: Context) {
+        downloadedLanguages = TessHelper.getDownloadedLanguages(context)
+
+        viewModelScope.launch(Dispatchers.IO) {
+            availableLanguages = TessHelper.getAvailableLanguages()
+        }
+    }
+
+    fun refreshDownloadedLanguages(context: Context) {
+        downloadedLanguages = TessHelper.getDownloadedLanguages(context)
+    }
+}