Manage Currencies

app/src/main/java/net/helcel/cowspent/android/currencies/ManageCurrenciesActivity.kt

@@ -7,14 +7,8 @@ import androidx.activity.enableEdgeToEdge
 import androidx.activity.compose.setContent
 import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
-import androidx.lifecycle.lifecycleScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 import net.helcel.cowspent.R
 import net.helcel.cowspent.android.helper.showToast
-import net.helcel.cowspent.model.DBBill
-import net.helcel.cowspent.model.DBCurrency
 import net.helcel.cowspent.model.ProjectType
 import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
 import net.helcel.cowspent.theme.ThemeUtils
@@ -25,7 +19,6 @@ class ManageCurrenciesActivity : AppCompatActivity() {
 
     internal val viewModel: ManageCurrenciesViewModel by viewModels()
     private var db: CowspentSQLiteOpenHelper? = null
-    private var selectedProjectID: Long = -1
 
     private val editMainCurrencyCallBack: ICallback = object : ICallback {
         override fun onFinish() {}
@@ -47,21 +40,17 @@ class ManageCurrenciesActivity : AppCompatActivity() {
         enableEdgeToEdge()
         super.onCreate(savedInstanceState)
 
-        intent.extras?.let {
+        val selectedProjectID = intent.getLongExtra(EXTRA_PROJECT_ID, -1L)
-            selectedProjectID = it.getLong(EXTRA_PROJECT_ID)
-        }
         if (selectedProjectID == -1L) {
             Log.e(TAG, "Missing project id")
             finish()
             return
         }
 
-        db = CowspentSQLiteOpenHelper.getInstance(this)
+        viewModel.projectId = selectedProjectID
+        viewModel.loadCurrencies()
 
-        lifecycleScope.launch {
+        db = CowspentSQLiteOpenHelper.getInstance(this)
-            val project = withContext(Dispatchers.IO) { db!!.getProject(selectedProjectID) }
-            viewModel.mainCurrencyName = project?.currencyName?.let { if (it == "null") "" else it } ?: ""
-            updateCurrenciesList()
 
         setContent {
             ThemeUtils.CowspentTheme {
@@ -69,109 +58,27 @@ class ManageCurrenciesActivity : AppCompatActivity() {
                     viewModel = viewModel,
                     onBack = { finish() },
                     onSaveMain = { saveMainCurrency() },
-                        onAdd = { addOrUpdateCurrency() },
+                    onAdd = { viewModel.addCurrency() },
-                        onDelete = { deleteCurrency(it) },
+                    onDelete = { viewModel.deleteCurrency(it.id) },
-                        onEdit = { startEditing(it) },
+                    onEdit = { viewModel.startEditing(it) },
-                        onCancelEdit = { cancelEditing() }
+                    onCancelEdit = { viewModel.cancelEditing() }
                 )
             }
         }
     }
-    }
 
     private fun saveMainCurrency() {
-        val newMainCurrencyName = viewModel.mainCurrencyName
+        val project = db?.getProject(viewModel.projectId)
-        lifecycleScope.launch {
-            withContext(Dispatchers.IO) {
-                db!!.updateProject(
-                    projId = selectedProjectID,
-                    newCurrencyName = newMainCurrencyName
-                )
-                val project = db!!.getProject(selectedProjectID)
         if (project != null) {
-                    db!!.syncIfRemote(project)
             if (project.type == ProjectType.COSPEND) {
-                        withContext(Dispatchers.Main) {
+                if (!db!!.cowspentServerSyncHelper.isSyncPossible) {
-                            if (!db!!.cowspentServerSyncHelper
+                    showToast(this, getString(R.string.remote_project_operation_no_network), Toast.LENGTH_LONG)
-                                    .editRemoteProject(
-                                        projId = selectedProjectID,
-                                        newName = project.name,
-                                        newMainCurrencyName = newMainCurrencyName,
-                                        callback = editMainCurrencyCallBack
-                                    )
-                            ) {
-                                showToast(this@ManageCurrenciesActivity, getString(R.string.remote_project_operation_no_network), Toast.LENGTH_LONG)
-                            }
                 }
             } else {
-                        withContext(Dispatchers.Main) {
+                showToast(this, getString(R.string.currency_saved_success), Toast.LENGTH_LONG)
-                            showToast(this@ManageCurrenciesActivity, getString(R.string.currency_saved_success), Toast.LENGTH_LONG)
             }
         }
-                }
+        viewModel.saveMainCurrency(editMainCurrencyCallBack)
-            }
-        }
-    }
-
-    private fun addOrUpdateCurrency() {
-        val uiRate = try { viewModel.newCurrencyRate.toDouble() } catch (_: Exception) { 0.0 }
-        val exchangeRate = if (uiRate != 0.0) 1.0 / uiRate else 0.0
-        val currencyName = viewModel.newCurrencyName
-        val editingId = viewModel.editingCurrencyId
-
-        lifecycleScope.launch {
-            withContext(Dispatchers.IO) {
-                if (editingId != null) {
-                    db!!.updateCurrency(editingId, currencyName, exchangeRate)
-                    val currency = db!!.getCurrency(editingId)
-                    if (currency != null) {
-                        db!!.setCurrencyStateSync(editingId, DBBill.STATE_EDITED)
-                    }
-                } else {
-                    val newCurrency = DBCurrency(
-                        0, 0, selectedProjectID,
-                        currencyName, exchangeRate, DBBill.STATE_ADDED
-                    )
-                    db!!.addCurrencyAndSync(newCurrency)
-                }
-            }
-            cancelEditing()
-            updateCurrenciesList()
-        }
-    }
-
-    private fun startEditing(currency: DBCurrency) {
-        viewModel.editingCurrencyId = currency.id
-        viewModel.newCurrencyName = currency.name ?: ""
-        val uiRate = if (currency.exchangeRate != 0.0) 1.0 / currency.exchangeRate else 0.0
-        viewModel.newCurrencyRate = uiRate.toString()
-    }
-
-    private fun cancelEditing() {
-        viewModel.editingCurrencyId = null
-        viewModel.newCurrencyName = ""
-        viewModel.newCurrencyRate = ""
-    }
-
-    private fun deleteCurrency(currency: DBCurrency) {
-        lifecycleScope.launch {
-            withContext(Dispatchers.IO) {
-                db!!.setCurrencyStateSync(currency.id, DBBill.STATE_DELETED)
-            }
-            updateCurrenciesList()
-        }
-    }
-
-    private suspend fun updateCurrenciesList() {
-        val currenciesDB = withContext(Dispatchers.IO) {
-            val list = db!!.getCurrenciesOfProjectWithState(selectedProjectID, DBBill.STATE_ADDED).toMutableList()
-            list.addAll(db!!.getCurrenciesOfProjectWithState(selectedProjectID, DBBill.STATE_EDITED))
-            list.addAll(db!!.getCurrenciesOfProjectWithState(selectedProjectID, DBBill.STATE_OK))
-            list
-        }
-        withContext(Dispatchers.Main) {
-            viewModel.currencies = currenciesDB
-        }
     }
 
     override fun onSupportNavigateUp(): Boolean {

app/src/main/java/net/helcel/cowspent/android/currencies/ManageCurrenciesScreen.kt

@@ -1,6 +1,7 @@
 package net.helcel.cowspent.android.currencies
 
 import android.annotation.SuppressLint
+import android.app.Application
 import androidx.compose.foundation.BorderStroke
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
@@ -351,9 +352,10 @@ fun CurrencyRowPreview() {
 @Preview(showBackground = true)
 @Composable
 fun ManageCurrenciesScreenPreview() {
+    val application = LocalContext.current.applicationContext as Application
     MaterialTheme {
         ManageCurrenciesScreen(
-            viewModel = ManageCurrenciesViewModel().apply {
+            viewModel = ManageCurrenciesViewModel(application).apply {
                 mainCurrencyName = "EUR"
                 currencies = listOf(
                     DBCurrency(1, 0, 0, "USD", 1.1, 0),

app/src/main/java/net/helcel/cowspent/android/currencies/ManageCurrenciesViewModel.kt

@@ -1,14 +1,24 @@
 package net.helcel.cowspent.android.currencies
 
+import android.app.Application
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.graphics.vector.ImageVector
-import androidx.lifecycle.ViewModel
+import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.viewModelScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 import net.helcel.cowspent.android.helper.DialogState
+import net.helcel.cowspent.model.DBBill
 import net.helcel.cowspent.model.DBCurrency
+import net.helcel.cowspent.model.ProjectType
+import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
+import net.helcel.cowspent.util.ICallback
 
-class ManageCurrenciesViewModel : ViewModel() {
+class ManageCurrenciesViewModel(application: Application) : AndroidViewModel(application) {
+    var projectId: Long = -1
     var mainCurrencyName by mutableStateOf("")
     var newCurrencyName by mutableStateOf("")
     var newCurrencyRate by mutableStateOf("")
@@ -19,6 +29,105 @@ class ManageCurrenciesViewModel : ViewModel() {
 
     var dialogState by mutableStateOf<DialogState?>(null)
 
+    private val db = CowspentSQLiteOpenHelper.getInstance(application)
+
+    fun loadCurrencies() {
+        if (projectId == -1L) return
+        viewModelScope.launch {
+            val project = withContext(Dispatchers.IO) { db.getProject(projectId) }
+            mainCurrencyName = project?.currencyName?.let { if (it == "null") "" else it } ?: ""
+            updateCurrenciesList()
+        }
+    }
+
+    suspend fun updateCurrenciesList() {
+        val currenciesDB = withContext(Dispatchers.IO) {
+            val list = db.getCurrenciesOfProjectWithState(projectId, DBBill.STATE_ADDED).toMutableList()
+            list.addAll(db.getCurrenciesOfProjectWithState(projectId, DBBill.STATE_EDITED))
+            list.addAll(db.getCurrenciesOfProjectWithState(projectId, DBBill.STATE_OK))
+            list
+        }
+        withContext(Dispatchers.Main) {
+            currencies = currenciesDB
+        }
+    }
+
+    fun saveMainCurrency(callback: ICallback) {
+        val newMainCurrencyName = mainCurrencyName
+        viewModelScope.launch {
+            withContext(Dispatchers.IO) {
+                db.updateProject(
+                    projId = projectId,
+                    newCurrencyName = newMainCurrencyName
+                )
+                val project = db.getProject(projectId)
+                if (project != null) {
+                    db.syncIfRemote(project)
+                    if (project.type == ProjectType.COSPEND) {
+                        withContext(Dispatchers.Main) {
+                            if (!db.cowspentServerSyncHelper
+                                    .editRemoteProject(
+                                        projId = projectId,
+                                        newName = project.name,
+                                        newMainCurrencyName = newMainCurrencyName,
+                                        callback = callback
+                                    )
+                            ) {
+                                // Handled by activity showing toast
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    fun addCurrency() {
+        val uiRate = try { newCurrencyRate.toDouble() } catch (_: Exception) { 0.0 }
+        val exchangeRate = if (uiRate != 0.0) 1.0 / uiRate else 0.0
+        val currencyName = newCurrencyName
+        val editingId = editingCurrencyId
+
+        viewModelScope.launch {
+            withContext(Dispatchers.IO) {
+                if (editingId != null) {
+                    db.updateCurrency(editingId, currencyName, exchangeRate)
+                    db.setCurrencyStateSync(editingId, DBBill.STATE_EDITED)
+                } else {
+                    val newCurrency = DBCurrency(
+                        0, 0, projectId,
+                        currencyName, exchangeRate, DBBill.STATE_ADDED
+                    )
+                    db.addCurrencyAndSync(newCurrency)
+                }
+            }
+            cancelEditing()
+            updateCurrenciesList()
+        }
+    }
+
+    fun deleteCurrency(currencyId: Long) {
+        viewModelScope.launch {
+            withContext(Dispatchers.IO) {
+                db.setCurrencyStateSync(currencyId, DBBill.STATE_DELETED)
+            }
+            updateCurrenciesList()
+        }
+    }
+
+    fun startEditing(currency: DBCurrency) {
+        editingCurrencyId = currency.id
+        newCurrencyName = currency.name ?: ""
+        val uiRate = if (currency.exchangeRate != 0.0) 1.0 / currency.exchangeRate else 0.0
+        newCurrencyRate = uiRate.toString()
+    }
+
+    fun cancelEditing() {
+        editingCurrencyId = null
+        newCurrencyName = ""
+        newCurrencyRate = ""
+    }
+
     fun showDialog(
         title: String? = null,
         message: String? = null,