Implement adding and modifying shopping list items (#165)

* Add dismissed shopping list item preview

* Implement editing of note and quantity

* Add new editor row for food

* Implement loading units and foods

* Display dropdown for foods

* Display dropdown for units

* Implement updating food and units

* Create secondary editor state constructor

* Display "Add" button

* Combine editing state to an object

* Implement showing editor for new items

* Implement saving new items

* Log final screen state

* Fix ordering of foods

* Show keyboard when editing starts

* Add bottom padding to the list

* Show new items above checked

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/models/FoodInfo.kt

@@ -0,0 +1,6 @@
+package gq.kirmanak.mealient.datasource.models
+
+data class FoodInfo(
+    val name: String,
+    val id: String
+)

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/models/FullShoppingListInfo.kt

@@ -14,8 +14,8 @@ data class ShoppingListItemInfo(
     val isFood: Boolean,
     val note: String,
     val quantity: Double,
-    val unit: String,
-    val food: String,
+    val unit: UnitInfo?,
+    val food: FoodInfo?,
     val recipeReferences: List<ShoppingListItemRecipeReferenceInfo>,
 )
 

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/models/NewShoppingListItemInfo.kt

@@ -0,0 +1,11 @@
+package gq.kirmanak.mealient.datasource.models
+
+data class NewShoppingListItemInfo(
+    val shoppingListId: String,
+    val isFood: Boolean,
+    val note: String,
+    val quantity: Double,
+    val unit: UnitInfo?,
+    val food: FoodInfo?,
+    val position: Int,
+)

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/models/UnitInfo.kt

@@ -0,0 +1,6 @@
+package gq.kirmanak.mealient.datasource.models
+
+data class UnitInfo(
+    val name: String,
+    val id: String
+)

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/v1/MealieDataSourceV1.kt

@@ -1,12 +1,16 @@
 package gq.kirmanak.mealient.datasource.v1
 
+import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.v1.models.CreateApiTokenRequestV1
 import gq.kirmanak.mealient.datasource.v1.models.CreateApiTokenResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.CreateRecipeRequestV1
+import gq.kirmanak.mealient.datasource.v1.models.CreateShoppingListItemRequestV1
+import gq.kirmanak.mealient.datasource.v1.models.GetFoodsResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetRecipeResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetRecipeSummaryResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListsResponseV1
+import gq.kirmanak.mealient.datasource.v1.models.GetUnitsResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetUserInfoResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.ParseRecipeURLRequestV1
 import gq.kirmanak.mealient.datasource.v1.models.UpdateRecipeRequestV1
@@ -63,7 +67,13 @@ interface MealieDataSourceV1 {
 
     suspend fun getShoppingList(id: String): GetShoppingListResponseV1
 
-    suspend fun updateIsShoppingListItemChecked(id: String, isChecked: Boolean)
-
     suspend fun deleteShoppingListItem(id: String)
+
+    suspend fun updateShoppingListItem(item: ShoppingListItemInfo)
+
+    suspend fun getFoods(): GetFoodsResponseV1
+
+    suspend fun getUnits(): GetUnitsResponseV1
+
+    suspend fun addShoppingListItem(request: CreateShoppingListItemRequestV1)
 }

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/v1/MealieDataSourceV1Impl.kt

@@ -3,14 +3,18 @@ package gq.kirmanak.mealient.datasource.v1
 import gq.kirmanak.mealient.datasource.NetworkError
 import gq.kirmanak.mealient.datasource.NetworkRequestWrapper
 import gq.kirmanak.mealient.datasource.decode
+import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.v1.models.CreateApiTokenRequestV1
 import gq.kirmanak.mealient.datasource.v1.models.CreateApiTokenResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.CreateRecipeRequestV1
+import gq.kirmanak.mealient.datasource.v1.models.CreateShoppingListItemRequestV1
 import gq.kirmanak.mealient.datasource.v1.models.ErrorDetailV1
+import gq.kirmanak.mealient.datasource.v1.models.GetFoodsResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetRecipeResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetRecipeSummaryResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListsResponseV1
+import gq.kirmanak.mealient.datasource.v1.models.GetUnitsResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetUserInfoResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.ParseRecipeURLRequestV1
 import gq.kirmanak.mealient.datasource.v1.models.UpdateRecipeRequestV1
@@ -20,9 +24,7 @@ import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.JsonElement
 import kotlinx.serialization.json.JsonObject
 import kotlinx.serialization.json.JsonPrimitive
-import kotlinx.serialization.json.boolean
 import kotlinx.serialization.json.jsonObject
-import kotlinx.serialization.json.jsonPrimitive
 import retrofit2.HttpException
 import java.net.ConnectException
 import java.net.SocketTimeoutException
@@ -175,20 +177,6 @@ class MealieDataSourceV1Impl @Inject constructor(
         logParameters = { "id = $id, request = $request" }
     )
 
-    override suspend fun updateIsShoppingListItemChecked(
-        id: String,
-        isChecked: Boolean
-    ) {
-        // Has to be done in two steps because the API doesn't support updating the checked state
-        val item = getShoppingListItem(id)
-        val wasChecked = item.jsonObject.getValue("checked").jsonPrimitive.boolean
-        if (wasChecked == isChecked) return
-        val updatedItem = item.jsonObject.toMutableMap().apply {
-            put("checked", JsonPrimitive(isChecked))
-        }
-        updateShoppingListItem(id, JsonObject(updatedItem))
-    }
-
     override suspend fun deleteShoppingListItem(
         id: String,
     ) = networkRequestWrapper.makeCallAndHandleUnauthorized(
@@ -196,4 +184,44 @@ class MealieDataSourceV1Impl @Inject constructor(
         logMethod = { "deleteShoppingListItem" },
         logParameters = { "id = $id" }
     )
+
+    override suspend fun updateShoppingListItem(
+        item: ShoppingListItemInfo
+    ) {
+        // Has to be done in two steps because we can't specify only the changed fields
+        val remoteItem = getShoppingListItem(item.id)
+        val updatedItem = remoteItem.jsonObject.toMutableMap().apply {
+            put("checked", JsonPrimitive(item.checked))
+            put("isFood", JsonPrimitive(item.isFood))
+            put("note", JsonPrimitive(item.note))
+            put("quantity", JsonPrimitive(item.quantity))
+            put("foodId", JsonPrimitive(item.food?.id))
+            put("unitId", JsonPrimitive(item.unit?.id))
+            remove("unit")
+            remove("food")
+        }
+        updateShoppingListItem(item.id, JsonObject(updatedItem))
+    }
+
+    override suspend fun getFoods(): GetFoodsResponseV1 {
+        return networkRequestWrapper.makeCallAndHandleUnauthorized(
+            block = { service.getFoods(perPage = -1) },
+            logMethod = { "getFoods" },
+        )
+    }
+
+    override suspend fun getUnits(): GetUnitsResponseV1 {
+        return networkRequestWrapper.makeCallAndHandleUnauthorized(
+            block = { service.getUnits(perPage = -1) },
+            logMethod = { "getUnits" },
+        )
+    }
+
+    override suspend fun addShoppingListItem(
+        request: CreateShoppingListItemRequestV1
+    ) = networkRequestWrapper.makeCallAndHandleUnauthorized(
+        block = { service.createShoppingListItem(request) },
+        logMethod = { "addShoppingListItem" },
+        logParameters = { "request = $request" }
+    )
 }

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/v1/MealieServiceV1.kt

@@ -94,4 +94,19 @@ interface MealieServiceV1 {
     suspend fun deleteShoppingListItem(
         @Path("id") id: String,
     )
+
+    @GET("/api/foods")
+    suspend fun getFoods(
+        @Query("perPage") perPage: Int,
+    ): GetFoodsResponseV1
+
+    @GET("/api/units")
+    suspend fun getUnits(
+        @Query("perPage") perPage: Int,
+    ): GetUnitsResponseV1
+
+    @POST("/api/groups/shopping/items")
+    suspend fun createShoppingListItem(
+        @Body request: CreateShoppingListItemRequestV1,
+    )
 }

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/v1/models/CreateShoppingListItemRequestV1.kt

@@ -0,0 +1,16 @@
+package gq.kirmanak.mealient.datasource.v1.models
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class CreateShoppingListItemRequestV1(
+    @SerialName("shopping_list_id") val shoppingListId: String,
+    @SerialName("checked") val checked: Boolean,
+    @SerialName("position") val position: Int?,
+    @SerialName("is_food") val isFood: Boolean,
+    @SerialName("note") val note: String,
+    @SerialName("quantity") val quantity: Double,
+    @SerialName("food_id") val foodId: String?,
+    @SerialName("unit_id") val unitId: String?,
+)

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/v1/models/GetFoodsResponseV1.kt

@@ -0,0 +1,15 @@
+package gq.kirmanak.mealient.datasource.v1.models
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class GetFoodsResponseV1(
+    @SerialName("items") val items: List<GetFoodResponseV1>,
+)
+
+@Serializable
+data class GetFoodResponseV1(
+    @SerialName("name") val name: String,
+    @SerialName("id") val id: String,
+)

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/v1/models/GetRecipeIngredientFoodResponseV1.kt

@@ -6,4 +6,5 @@ import kotlinx.serialization.Serializable
 @Serializable
 data class GetRecipeIngredientFoodResponseV1(
     @SerialName("name") val name: String = "",
+    @SerialName("id") val id: String = "",
 )

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/v1/models/GetRecipeIngredientUnitResponseV1.kt

@@ -6,4 +6,5 @@ import kotlinx.serialization.Serializable
 @Serializable
 data class GetRecipeIngredientUnitResponseV1(
     @SerialName("name") val name: String = "",
+    @SerialName("id") val id: String = "",
 )

datasource/src/main/kotlin/gq/kirmanak/mealient/datasource/v1/models/GetUnitsResponseV1.kt

@@ -0,0 +1,15 @@
+package gq.kirmanak.mealient.datasource.v1.models
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class GetUnitsResponseV1(
+    @SerialName("items") val items: List<GetUnitResponseV1>
+)
+
+@Serializable
+data class GetUnitResponseV1(
+    @SerialName("name") val name: String,
+    @SerialName("id") val id: String
+)

features/shopping_lists/build.gradle.kts

@@ -22,6 +22,7 @@ dependencies {
 
     implementation(libs.android.material.material)
     implementation(libs.androidx.compose.material)
+    implementation(libs.androidx.compose.materialIconsExtended)
 
     implementation(libs.google.dagger.hiltAndroid)
     kapt(libs.google.dagger.hiltCompiler)

features/shopping_lists/src/main/kotlin/gq/kirmanak/mealient/shopping_lists/network/ShoppingListsDataSource.kt

@@ -1,7 +1,11 @@
 package gq.kirmanak.mealient.shopping_lists.network
 
+import gq.kirmanak.mealient.datasource.models.FoodInfo
 import gq.kirmanak.mealient.datasource.models.FullShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.NewShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
+import gq.kirmanak.mealient.datasource.models.UnitInfo
 
 interface ShoppingListsDataSource {
 
@@ -9,7 +13,13 @@ interface ShoppingListsDataSource {
 
     suspend fun getShoppingList(id: String): FullShoppingListInfo
 
-    suspend fun updateIsShoppingListItemChecked(id: String, checked: Boolean)
-
     suspend fun deleteShoppingListItem(id: String)
+
+    suspend fun updateShoppingListItem(item: ShoppingListItemInfo)
+
+    suspend fun getFoods(): List<FoodInfo>
+
+    suspend fun getUnits(): List<UnitInfo>
+
+    suspend fun addShoppingListItem(item: NewShoppingListItemInfo)
 }

features/shopping_lists/src/main/kotlin/gq/kirmanak/mealient/shopping_lists/network/ShoppingListsDataSourceImpl.kt

@@ -1,7 +1,11 @@
 package gq.kirmanak.mealient.shopping_lists.network
 
+import gq.kirmanak.mealient.datasource.models.FoodInfo
 import gq.kirmanak.mealient.datasource.models.FullShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.NewShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
+import gq.kirmanak.mealient.datasource.models.UnitInfo
 import gq.kirmanak.mealient.datasource.v1.MealieDataSourceV1
 import gq.kirmanak.mealient.model_mapper.ModelMapper
 import javax.inject.Inject
@@ -20,14 +24,20 @@ class ShoppingListsDataSourceImpl @Inject constructor(
         id: String
     ): FullShoppingListInfo = modelMapper.toFullShoppingListInfo(v1Source.getShoppingList(id))
 
-    override suspend fun updateIsShoppingListItemChecked(
-        id: String,
-        checked: Boolean,
-    ) = v1Source.updateIsShoppingListItemChecked(id, checked)
-
     override suspend fun deleteShoppingListItem(
         id: String
     ) = v1Source.deleteShoppingListItem(id)
 
+    override suspend fun updateShoppingListItem(
+        item: ShoppingListItemInfo
+    ) = v1Source.updateShoppingListItem(item)
+
+    override suspend fun getFoods(): List<FoodInfo> = modelMapper.toFoodInfo(v1Source.getFoods())
+
+    override suspend fun getUnits(): List<UnitInfo> = modelMapper.toUnitInfo(v1Source.getUnits())
+
+    override suspend fun addShoppingListItem(
+        item: NewShoppingListItemInfo
+    ) = v1Source.addShoppingListItem(modelMapper.toV1CreateRequest(item))
 }
 

features/shopping_lists/src/main/kotlin/gq/kirmanak/mealient/shopping_lists/repo/ShoppingListsRepo.kt

@@ -1,15 +1,25 @@
 package gq.kirmanak.mealient.shopping_lists.repo
 
+import gq.kirmanak.mealient.datasource.models.FoodInfo
 import gq.kirmanak.mealient.datasource.models.FullShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.NewShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
+import gq.kirmanak.mealient.datasource.models.UnitInfo
 
 interface ShoppingListsRepo {
 
-    suspend fun updateIsShoppingListItemChecked(id: String, isChecked: Boolean)
-
     suspend fun getShoppingLists(): List<ShoppingListInfo>
 
     suspend fun getShoppingList(id: String): FullShoppingListInfo
 
     suspend fun deleteShoppingListItem(id: String)
+
+    suspend fun updateShoppingListItem(item: ShoppingListItemInfo)
+
+    suspend fun getFoods(): List<FoodInfo>
+
+    suspend fun getUnits(): List<UnitInfo>
+
+    suspend fun addShoppingListItem(item: NewShoppingListItemInfo)
 }

features/shopping_lists/src/main/kotlin/gq/kirmanak/mealient/shopping_lists/repo/ShoppingListsRepoImpl.kt

@@ -1,7 +1,11 @@
 package gq.kirmanak.mealient.shopping_lists.repo
 
+import gq.kirmanak.mealient.datasource.models.FoodInfo
 import gq.kirmanak.mealient.datasource.models.FullShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.NewShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
+import gq.kirmanak.mealient.datasource.models.UnitInfo
 import gq.kirmanak.mealient.logging.Logger
 import gq.kirmanak.mealient.shopping_lists.network.ShoppingListsDataSource
 import javax.inject.Inject
@@ -11,11 +15,6 @@ class ShoppingListsRepoImpl @Inject constructor(
     private val logger: Logger,
 ) : ShoppingListsRepo {
 
-    override suspend fun updateIsShoppingListItemChecked(id: String, isChecked: Boolean) {
-        logger.v { "updateIsShoppingListItemChecked() called with: id = $id, isChecked = $isChecked" }
-        dataSource.updateIsShoppingListItemChecked(id, isChecked)
-    }
-
     override suspend fun getShoppingLists(): List<ShoppingListInfo> {
         logger.v { "getShoppingLists() called" }
         return dataSource.getAllShoppingLists()
@@ -30,4 +29,24 @@ class ShoppingListsRepoImpl @Inject constructor(
         logger.v { "deleteShoppingListItem() called with: id = $id" }
         dataSource.deleteShoppingListItem(id)
     }
+
+    override suspend fun updateShoppingListItem(item: ShoppingListItemInfo) {
+        logger.v { "updateShoppingListItem() called with: item = $item" }
+        dataSource.updateShoppingListItem(item)
+    }
+
+    override suspend fun getFoods(): List<FoodInfo> {
+        logger.v { "getFoods() called" }
+        return dataSource.getFoods()
+    }
+
+    override suspend fun getUnits(): List<UnitInfo> {
+        logger.v { "getUnits() called" }
+        return dataSource.getUnits()
+    }
+
+    override suspend fun addShoppingListItem(item: NewShoppingListItemInfo) {
+        logger.v { "addShoppingListItem() called with: item = $item" }
+        dataSource.addShoppingListItem(item)
+    }
 }

features/shopping_lists/src/main/kotlin/gq/kirmanak/mealient/shopping_lists/ui/ShoppingListData.kt

@@ -0,0 +1,11 @@
+package gq.kirmanak.mealient.shopping_lists.ui
+
+import gq.kirmanak.mealient.datasource.models.FoodInfo
+import gq.kirmanak.mealient.datasource.models.FullShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.UnitInfo
+
+data class ShoppingListData(
+    val foods: List<FoodInfo>,
+    val units: List<UnitInfo>,
+    val shoppingList: FullShoppingListInfo,
+)

features/shopping_lists/src/main/kotlin/gq/kirmanak/mealient/shopping_lists/ui/ShoppingListEditingState.kt

@@ -0,0 +1,10 @@
+package gq.kirmanak.mealient.shopping_lists.ui
+
+import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
+
+data class ShoppingListEditingState(
+    val deletedItemIds: Set<String> = emptySet(),
+    val editingItemIds: Set<String> = emptySet(),
+    val modifiedItems: Map<String, ShoppingListItemInfo> = emptyMap(),
+    val newItems: List<ShoppingListItemState.NewItem> = emptyList(),
+)

features/shopping_lists/src/main/kotlin/gq/kirmanak/mealient/shopping_lists/ui/ShoppingListScreen.kt

@@ -11,45 +11,69 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.Check
+import androidx.compose.material.icons.filled.Close
 import androidx.compose.material.icons.filled.Delete
+import androidx.compose.material.icons.filled.Edit
+import androidx.compose.material.icons.filled.NoMeals
+import androidx.compose.material.icons.filled.Restaurant
 import androidx.compose.material3.Checkbox
-import androidx.compose.material3.DismissDirection
+import androidx.compose.material3.DismissState
 import androidx.compose.material3.DismissValue
 import androidx.compose.material3.Divider
+import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.ExposedDropdownMenuBox
+import androidx.compose.material3.ExposedDropdownMenuDefaults
+import androidx.compose.material3.FloatingActionButton
 import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.SwipeToDismiss
 import androidx.compose.material3.Text
 import androidx.compose.material3.rememberDismissState
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.hilt.navigation.compose.hiltViewModel
 import com.ramcosta.composedestinations.annotation.Destination
 import gq.kirmanak.mealient.AppTheme
 import gq.kirmanak.mealient.Dimens
+import gq.kirmanak.mealient.datasource.models.FoodInfo
 import gq.kirmanak.mealient.datasource.models.FullRecipeInfo
 import gq.kirmanak.mealient.datasource.models.RecipeIngredientInfo
 import gq.kirmanak.mealient.datasource.models.RecipeInstructionInfo
 import gq.kirmanak.mealient.datasource.models.RecipeSettingsInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListItemRecipeReferenceInfo
+import gq.kirmanak.mealient.datasource.models.UnitInfo
 import gq.kirmanak.mealient.shopping_list.R
 import gq.kirmanak.mealient.shopping_lists.ui.composables.LazyColumnWithLoadingState
 import gq.kirmanak.mealient.shopping_lists.util.data
 import gq.kirmanak.mealient.shopping_lists.util.map
+import kotlinx.coroutines.android.awaitFrame
 import java.text.DecimalFormat
 
 data class ShoppingListNavArgs(
     val shoppingListId: String,
 )
 
+@OptIn(ExperimentalMaterial3Api::class)
 @Destination(
     navArgsDelegate = ShoppingListNavArgs::class,
 )
@@ -65,54 +89,415 @@ internal fun ShoppingListScreen(
 
     LazyColumnWithLoadingState(
         loadingState = loadingState.map { it.items },
-        contentPadding = PaddingValues(Dimens.Medium),
+        contentPadding = PaddingValues(
+            start = Dimens.Medium,
+            end = Dimens.Medium,
+            top = Dimens.Medium,
+            bottom = Dimens.Large * 4,
+        ),
         verticalArrangement = Arrangement.spacedBy(Dimens.Medium),
         defaultEmptyListError = defaultEmptyListError,
         errorToShowInSnackbar = shoppingListViewModel.errorToShowInSnackbar,
         onRefresh = shoppingListViewModel::refreshShoppingList,
-        onSnackbarShown = shoppingListViewModel::onSnackbarShown
+        onSnackbarShown = shoppingListViewModel::onSnackbarShown,
+        floatingActionButton = {
+            FloatingActionButton(onClick = shoppingListViewModel::onAddItemClicked) {
+                Icon(
+                    imageVector = Icons.Default.Add,
+                    contentDescription = stringResource(id = R.string.shopping_list_screen_add_icon_content_description),
+                )
+            }
+        }
     ) { items ->
         val firstCheckedItemIndex = items.indexOfFirst { it.checked }
 
-        itemsIndexed(items, { _, item -> item.id }) { index, item ->
-            ShoppingListItem(
-                shoppingListItem = item,
-                showDivider = index == firstCheckedItemIndex && index != 0,
-                modifier = Modifier.background(MaterialTheme.colorScheme.surface),
-                onCheckedChange = { isChecked ->
-                    shoppingListViewModel.onItemCheckedChange(item, isChecked)
-                },
-                onDismissed = {
-                    shoppingListViewModel.deleteShoppingListItem(item)
+        itemsIndexed(items, { _, item -> item.id }) { index, itemState ->
+            if (itemState is ShoppingListItemState.ExistingItem) {
+                if (itemState.isEditing) {
+                    val state = remember {
+                        ShoppingListItemEditorState(
+                            state = itemState,
+                            foods = loadingState.data?.foods.orEmpty(),
+                            units = loadingState.data?.units.orEmpty(),
+                        )
+                    }
+                    ShoppingListItemEditor(
+                        state = state,
+                        onEditCancelled = { shoppingListViewModel.onEditCancel(itemState) },
+                        onEditConfirmed = { shoppingListViewModel.onEditConfirm(itemState, state) }
+                    )
+                } else {
+                    ShoppingListItem(
+                        itemState = itemState,
+                        showDivider = index == firstCheckedItemIndex && index != 0,
+                        modifier = Modifier.background(MaterialTheme.colorScheme.surface),
+                        onCheckedChange = {
+                            shoppingListViewModel.onItemCheckedChange(itemState, it)
+                        },
+                        onDismissed = { shoppingListViewModel.deleteShoppingListItem(itemState) },
+                        onEditStart = { shoppingListViewModel.onEditStart(itemState) },
+                    )
                 }
+            } else if (itemState is ShoppingListItemState.NewItem) {
+                ShoppingListItemEditor(
+                    state = itemState.item,
+                    onEditCancelled = { shoppingListViewModel.onAddCancel(itemState) },
+                    onEditConfirmed = { shoppingListViewModel.onAddConfirm(itemState) }
+                )
+            }
+        }
+    }
+}
+
+@Composable
+fun ShoppingListItemEditor(
+    state: ShoppingListItemEditorState,
+    modifier: Modifier = Modifier,
+    onEditCancelled: () -> Unit = {},
+    onEditConfirmed: () -> Unit = {},
+) {
+    Column(
+        modifier = modifier.fillMaxWidth(),
+        verticalArrangement = Arrangement.spacedBy(Dimens.Small),
+        horizontalAlignment = Alignment.End,
+    ) {
+        ShoppingListItemEditorFirstRow(
+            state = state
+        )
+        if (state.isFood) {
+            ShoppingListItemEditorFoodRow(state = state)
+        }
+        ShoppingListItemEditorButtonRow(
+            state = state,
+            onEditCancelled = onEditCancelled,
+            onEditConfirmed = onEditConfirmed
+        )
+    }
+}
+
+@Composable
+private fun ShoppingListItemEditorFirstRow(
+    state: ShoppingListItemEditorState,
+    modifier: Modifier = Modifier,
+) {
+
+    val focusRequester = remember { FocusRequester() }
+
+    Row(
+        modifier = modifier,
+        horizontalArrangement = Arrangement.spacedBy(Dimens.Small),
+    ) {
+        OutlinedTextField(
+            value = state.quantity,
+            onValueChange = { newValue ->
+                val input = newValue.trim()
+                    .let {
+                        if (state.quantity == "0") {
+                            it.removeSuffix("0").removePrefix("0")
+                        } else {
+                            it
+                        }
+                    }
+                    .ifEmpty { "0" }
+                if (input.toDoubleOrNull() != null) {
+                    state.quantity = input
+                }
+            },
+            modifier = Modifier.weight(1f),
+            textStyle = MaterialTheme.typography.bodyMedium,
+            label = {
+                Text(
+                    text = stringResource(id = R.string.shopping_list_screen_editor_quantity_label),
+                    style = MaterialTheme.typography.labelMedium,
+                )
+            },
+            keyboardOptions = KeyboardOptions(
+                keyboardType = KeyboardType.Number,
+            ),
+            singleLine = true,
+        )
+
+        OutlinedTextField(
+            value = state.note,
+            onValueChange = { state.note = it },
+            textStyle = MaterialTheme.typography.bodyMedium,
+            label = {
+                Text(
+                    text = stringResource(id = R.string.shopping_list_screen_editor_note_label),
+                    style = MaterialTheme.typography.labelMedium,
+                )
+            },
+            singleLine = true,
+            modifier = Modifier
+                .weight(3f, true)
+                .focusRequester(focusRequester),
+        )
+    }
+
+    LaunchedEffect(focusRequester) {
+        awaitFrame()
+        focusRequester.requestFocus()
+    }
+}
+
+@Composable
+private fun ShoppingListItemEditorButtonRow(
+    state: ShoppingListItemEditorState,
+    modifier: Modifier = Modifier,
+    onEditCancelled: () -> Unit = {},
+    onEditConfirmed: () -> Unit = {},
+) {
+    Row(
+        modifier = modifier,
+        horizontalArrangement = Arrangement.spacedBy(Dimens.Small)
+    ) {
+        IconButton(onClick = {
+            state.isFood = !state.isFood
+        }) {
+            val stringId = if (state.isFood) {
+                R.string.shopping_list_screen_editor_not_food_button
+            } else {
+                R.string.shopping_list_screen_editor_food_button
+            }
+            val icon = if (state.isFood) {
+                Icons.Default.NoMeals
+            } else {
+                Icons.Default.Restaurant
+            }
+            Icon(
+                imageVector = icon,
+                contentDescription = stringResource(id = stringId)
+            )
+        }
+
+        IconButton(onClick = onEditCancelled) {
+            Icon(
+                imageVector = Icons.Default.Close,
+                contentDescription = stringResource(id = R.string.shopping_list_screen_editor_cancel_button)
+            )
+        }
+
+        IconButton(onClick = onEditConfirmed) {
+            Icon(
+                imageVector = Icons.Default.Check,
+                contentDescription = stringResource(id = R.string.shopping_list_screen_editor_save_button)
             )
         }
     }
 }
 
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun ShoppingListItemEditorFoodRow(
+    state: ShoppingListItemEditorState,
+    modifier: Modifier = Modifier,
+) {
+    Row(
+        modifier = modifier,
+        horizontalArrangement = Arrangement.spacedBy(Dimens.Small),
+    ) {
+        ExposedDropdownMenuBox(
+            expanded = state.foodsExpanded,
+            onExpandedChange = { state.foodsExpanded = it },
+            modifier = Modifier.weight(1f),
+        ) {
+            OutlinedTextField(
+                value = state.food?.name.orEmpty(),
+                onValueChange = { },
+                modifier = Modifier.menuAnchor(),
+                readOnly = true,
+                textStyle = MaterialTheme.typography.bodyMedium,
+                label = {
+                    Text(
+                        text = stringResource(id = R.string.shopping_list_screen_editor_food_label),
+                        style = MaterialTheme.typography.labelMedium,
+                    )
+                },
+                singleLine = true,
+                trailingIcon = {
+                    ExposedDropdownMenuDefaults.TrailingIcon(expanded = state.foodsExpanded)
+                },
+                colors = ExposedDropdownMenuDefaults.outlinedTextFieldColors(),
+            )
+
+            ExposedDropdownMenu(
+                expanded = state.foodsExpanded,
+                onDismissRequest = { state.foodsExpanded = false }
+            ) {
+                state.foods.forEach {
+                    DropdownMenuItem(
+                        text = {
+                            Text(text = it.name, style = MaterialTheme.typography.bodyMedium)
+                        },
+                        onClick = {
+                            state.food = it
+                            state.foodsExpanded = false
+                        },
+                        trailingIcon = {
+                            if (it == state.food) {
+                                Icon(
+                                    imageVector = Icons.Default.Check,
+                                    contentDescription = stringResource(id = R.string.shopping_list_screen_editor_checked_unit_content_description),
+                                )
+                            }
+                        },
+                        contentPadding = ExposedDropdownMenuDefaults.ItemContentPadding,
+                    )
+                }
+            }
+        }
+
+        ExposedDropdownMenuBox(
+            expanded = state.unitsExpanded,
+            onExpandedChange = { state.unitsExpanded = it },
+            modifier = Modifier.weight(1f),
+        ) {
+            OutlinedTextField(
+                value = state.unit?.name.orEmpty(),
+                onValueChange = { },
+                modifier = Modifier.menuAnchor(),
+                readOnly = true,
+                textStyle = MaterialTheme.typography.bodyMedium,
+                label = {
+                    Text(
+                        text = stringResource(id = R.string.shopping_list_screen_editor_unit_label),
+                        style = MaterialTheme.typography.labelMedium,
+                    )
+                },
+                singleLine = true,
+                trailingIcon = {
+                    ExposedDropdownMenuDefaults.TrailingIcon(expanded = state.unitsExpanded)
+                },
+                colors = ExposedDropdownMenuDefaults.outlinedTextFieldColors(),
+            )
+
+            ExposedDropdownMenu(
+                expanded = state.unitsExpanded,
+                onDismissRequest = { state.unitsExpanded = false }
+            ) {
+                state.units.forEach {
+                    DropdownMenuItem(
+                        text = {
+                            Text(text = it.name, style = MaterialTheme.typography.bodyMedium)
+                        },
+                        onClick = {
+                            state.unit = it
+                            state.unitsExpanded = false
+                        },
+                        trailingIcon = {
+                            if (it == state.unit) {
+                                Icon(
+                                    imageVector = Icons.Default.Check,
+                                    contentDescription = stringResource(id = R.string.shopping_list_screen_editor_checked_unit_content_description),
+                                )
+                            }
+                        },
+                        contentPadding = ExposedDropdownMenuDefaults.ItemContentPadding,
+                    )
+                }
+            }
+        }
+    }
+}
+
+class ShoppingListItemEditorState(
+    val foods: List<FoodInfo>,
+    val units: List<UnitInfo>,
+    val position: Int,
+    val listId: String,
+    note: String = "",
+    quantity: String = "1.0",
+    isFood: Boolean = false,
+    food: FoodInfo? = null,
+    unit: UnitInfo? = null,
+) {
+
+    constructor(
+        state: ShoppingListItemState.ExistingItem,
+        foods: List<FoodInfo>,
+        units: List<UnitInfo>,
+    ) : this(
+        foods = foods,
+        units = units,
+        position = state.item.position,
+        listId = state.item.shoppingListId,
+        note = state.item.note,
+        quantity = state.item.quantity.toString(),
+        isFood = state.item.isFood,
+        food = state.item.food,
+        unit = state.item.unit,
+    )
+
+    var note: String by mutableStateOf(note)
+
+    var quantity: String by mutableStateOf(quantity)
+
+    var isFood: Boolean by mutableStateOf(isFood)
+
+    var food: FoodInfo? by mutableStateOf(food)
+
+    var unit: UnitInfo? by mutableStateOf(unit)
+
+    var foodsExpanded: Boolean by mutableStateOf(false)
+
+    var unitsExpanded: Boolean by mutableStateOf(false)
+}
+
+@Preview
+@Composable
+fun ShoppingListItemEditorPreview() {
+    AppTheme {
+        ShoppingListItemEditor(
+            state = ShoppingListItemEditorState(
+                state = ShoppingListItemState.ExistingItem(PreviewData.milk),
+                foods = emptyList(),
+                units = emptyList(),
+            )
+        )
+    }
+}
+
+@Preview
+@Composable
+fun ShoppingListItemEditorNonFoodPreview() {
+    AppTheme {
+        ShoppingListItemEditor(
+            state = ShoppingListItemEditorState(
+                state = ShoppingListItemState.ExistingItem(PreviewData.blackTeaBags),
+                foods = emptyList(),
+                units = emptyList(),
+            )
+        )
+    }
+}
+
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun ShoppingListItem(
-    shoppingListItem: ShoppingListItemInfo,
+    itemState: ShoppingListItemState.ExistingItem,
     showDivider: Boolean,
     modifier: Modifier = Modifier,
     onCheckedChange: (Boolean) -> Unit = {},
     onDismissed: () -> Unit = {},
-) {
-    val dismissState = rememberDismissState(
+    onEditStart: () -> Unit = {},
+    dismissState: DismissState = rememberDismissState(
         confirmValueChange = {
-            if (it == DismissValue.DismissedToStart) {
-                onDismissed()
+            when (it) {
+                DismissValue.DismissedToStart -> onDismissed()
+                DismissValue.DismissedToEnd -> onEditStart()
+                DismissValue.Default -> Unit
             }
             true
         }
     )
+) {
+    val shoppingListItem = itemState.item
     SwipeToDismiss(
         state = dismissState,
         background = {
             if (dismissState.targetValue == DismissValue.DismissedToStart) {
                 val color by animateColorAsState(MaterialTheme.colorScheme.error)
-                val iconColor by animateColorAsState(MaterialTheme.colorScheme.onSurface)
+                val iconColor by animateColorAsState(MaterialTheme.colorScheme.onError)
                 Box(
                     modifier = Modifier
                         .fillMaxSize()
@@ -127,6 +512,23 @@ fun ShoppingListItem(
                             .padding(end = Dimens.Small)
                     )
                 }
+            } else if (dismissState.targetValue == DismissValue.DismissedToEnd) {
+                val color by animateColorAsState(MaterialTheme.colorScheme.primary)
+                val iconColor by animateColorAsState(MaterialTheme.colorScheme.onPrimary)
+                Box(
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .background(color)
+                ) {
+                    Icon(
+                        imageVector = Icons.Default.Edit,
+                        contentDescription = stringResource(R.string.shopping_list_screen_edit_icon_content_description),
+                        tint = iconColor,
+                        modifier = Modifier
+                            .align(Alignment.CenterStart)
+                            .padding(start = Dimens.Small)
+                    )
+                }
             }
         },
         dismissContent = {
@@ -143,7 +545,7 @@ fun ShoppingListItem(
                     horizontalArrangement = Arrangement.Start,
                 ) {
                     Checkbox(
-                        checked = shoppingListItem.checked,
+                        checked = itemState.item.checked,
                         onCheckedChange = onCheckedChange,
                     )
 
@@ -154,8 +556,8 @@ fun ShoppingListItem(
                         ?.let { DecimalFormat.getInstance().format(it) }
                     val text = listOfNotNull(
                         quantity,
-                        shoppingListItem.unit.takeIf { isFood },
-                        shoppingListItem.food.takeIf { isFood },
+                        shoppingListItem.unit.takeIf { isFood }?.name,
+                        shoppingListItem.food.takeIf { isFood }?.name,
                         shoppingListItem.note,
                     ).filter { it.isNotBlank() }.joinToString(" ")
 
@@ -164,23 +566,60 @@ fun ShoppingListItem(
             }
         },
         modifier = modifier,
-        directions = setOf(DismissDirection.EndToStart),
     )
 }
 
+@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 @Preview
 fun PreviewShoppingListItemChecked() {
     AppTheme {
-        ShoppingListItem(shoppingListItem = PreviewData.milk, false)
+        ShoppingListItem(
+            itemState = ShoppingListItemState.ExistingItem(PreviewData.milk),
+            showDivider = false
+        )
     }
 }
 
+@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 @Preview
 fun PreviewShoppingListItemUnchecked() {
     AppTheme {
-        ShoppingListItem(shoppingListItem = PreviewData.blackTeaBags, false)
+        ShoppingListItem(
+            itemState = ShoppingListItemState.ExistingItem(PreviewData.blackTeaBags),
+            showDivider = true
+        )
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+@Preview
+fun PreviewShoppingListItemDismissed() {
+    AppTheme {
+        ShoppingListItem(
+            itemState = ShoppingListItemState.ExistingItem(PreviewData.blackTeaBags),
+            showDivider = false,
+            dismissState = rememberDismissState(
+                initialValue = DismissValue.DismissedToStart,
+            ),
+        )
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+@Preview
+fun PreviewShoppingListItemEditing() {
+    AppTheme {
+        ShoppingListItem(
+            itemState = ShoppingListItemState.ExistingItem(PreviewData.blackTeaBags),
+            showDivider = false,
+            dismissState = rememberDismissState(
+                initialValue = DismissValue.DismissedToEnd,
+            ),
+        )
     }
 }
 
@@ -226,8 +665,8 @@ private object PreviewData {
         isFood = false,
         note = "Black tea bags",
         quantity = 30.0,
-        unit = "",
-        food = "",
+        unit = null,
+        food = null,
         recipeReferences = listOf(
             ShoppingListItemRecipeReferenceInfo(
                 shoppingListId = "1",
@@ -243,12 +682,12 @@ private object PreviewData {
         id = "2",
         shoppingListId = "1",
         checked = true,
-        position = 1,
+        position = 0,
         isFood = true,
         note = "Cold",
         quantity = 500.0,
-        unit = "ml",
-        food = "Milk",
+        unit = UnitInfo("ml", ""),
+        food = FoodInfo("Milk", ""),
         recipeReferences = listOf(
             ShoppingListItemRecipeReferenceInfo(
                 shoppingListId = "1",

features/shopping_lists/src/main/kotlin/gq/kirmanak/mealient/shopping_lists/ui/ShoppingListScreenState.kt

@@ -1,8 +1,45 @@
 package gq.kirmanak.mealient.shopping_lists.ui
 
+import gq.kirmanak.mealient.datasource.models.FoodInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
+import gq.kirmanak.mealient.datasource.models.UnitInfo
+import java.util.UUID
 
 internal data class ShoppingListScreenState(
     val name: String,
-    val items: List<ShoppingListItemInfo>,
+    val listId: String,
+    val items: List<ShoppingListItemState>,
+    val foods: List<FoodInfo>,
+    val units: List<UnitInfo>,
 )
+
+sealed class ShoppingListItemState {
+
+    data class ExistingItem(
+        val item: ShoppingListItemInfo,
+        val isEditing: Boolean = false,
+    ) : ShoppingListItemState()
+
+    data class NewItem(
+        val item: ShoppingListItemEditorState,
+        val id: String = UUID.randomUUID().toString(),
+    ) : ShoppingListItemState()
+}
+
+val ShoppingListItemState.id: String
+    get() = when (this) {
+        is ShoppingListItemState.ExistingItem -> item.id
+        is ShoppingListItemState.NewItem -> id
+    }
+
+val ShoppingListItemState.checked: Boolean
+    get() = when (this) {
+        is ShoppingListItemState.ExistingItem -> item.checked
+        is ShoppingListItemState.NewItem -> false
+    }
+
+val ShoppingListItemState.position: Int
+    get() = when (this) {
+        is ShoppingListItemState.ExistingItem -> item.position
+        is ShoppingListItemState.NewItem -> item.position
+    }

features/shopping_lists/src/main/kotlin/gq/kirmanak/mealient/shopping_lists/ui/ShoppingListViewModel.kt

@@ -8,7 +8,7 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import gq.kirmanak.mealient.architecture.valueUpdatesOnly
-import gq.kirmanak.mealient.datasource.models.FullShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.NewShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.runCatchingExceptCancel
 import gq.kirmanak.mealient.logging.Logger
@@ -18,7 +18,10 @@ import gq.kirmanak.mealient.shopping_lists.ui.destinations.ShoppingListScreenDes
 import gq.kirmanak.mealient.shopping_lists.util.LoadingHelperFactory
 import gq.kirmanak.mealient.shopping_lists.util.LoadingState
 import gq.kirmanak.mealient.shopping_lists.util.LoadingStateNoData
+import gq.kirmanak.mealient.shopping_lists.util.data
 import gq.kirmanak.mealient.shopping_lists.util.map
+import kotlinx.coroutines.async
+import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
@@ -39,18 +42,15 @@ internal class ShoppingListViewModel @Inject constructor(
 
     private val args: ShoppingListNavArgs = ShoppingListScreenDestination.argsFrom(savedStateHandle)
 
-    private val checkedOverride = MutableStateFlow<MutableMap<String, Boolean>>(mutableMapOf())
-
-    private val deletedItemIds = MutableStateFlow<Set<String>>(mutableSetOf())
+    private val editingStateFlow = MutableStateFlow(ShoppingListEditingState())
 
     private val loadingHelper = loadingHelperFactory.create(viewModelScope) {
-        shoppingListsRepo.getShoppingList(args.shoppingListId)
+        loadShoppingListData()
     }
 
     val loadingState: StateFlow<LoadingState<ShoppingListScreenState>> = combine(
         loadingHelper.loadingState,
-        checkedOverride,
-        deletedItemIds,
+        editingStateFlow,
         ::buildLoadingState,
     ).stateIn(viewModelScope, SharingStarted.Eagerly, LoadingStateNoData.InitialLoad)
 
@@ -79,46 +79,70 @@ internal class ShoppingListViewModel @Inject constructor(
         }
     }
 
+    private suspend fun loadShoppingListData(): ShoppingListData = coroutineScope {
+        val foodsDeferred = async {
+            runCatchingExceptCancel {
+                shoppingListsRepo.getFoods()
+            }.getOrDefault(emptyList())
+        }
+
+        val unitsDeferred = async {
+            runCatchingExceptCancel {
+                shoppingListsRepo.getUnits()
+            }.getOrDefault(emptyList())
+        }
+
+        val shoppingListDeferred = async {
+            shoppingListsRepo.getShoppingList(args.shoppingListId)
+        }
+
+        ShoppingListData(
+            foods = foodsDeferred.await(),
+            units = unitsDeferred.await(),
+            shoppingList = shoppingListDeferred.await(),
+        )
+    }
+
     private suspend fun doRefresh() {
         _errorToShowInSnackbar = loadingHelper.refresh().exceptionOrNull()
     }
 
     private fun buildLoadingState(
-        loadingState: LoadingState<FullShoppingListInfo>,
-        checkedOverrideMap: Map<String, Boolean>,
-        deletedItemIds: Set<String>,
+        loadingState: LoadingState<ShoppingListData>,
+        editingState: ShoppingListEditingState,
     ): LoadingState<ShoppingListScreenState> {
-        logger.v { "buildLoadingState() called with: loadingState = $loadingState, checkedOverrideMap = $checkedOverrideMap, deletedItemIds = $deletedItemIds" }
-        return loadingState.map { shoppingList ->
-            val items = shoppingList.items
-                .filter { it.id !in deletedItemIds }
-                .map { it.copy(checked = checkedOverrideMap[it.id] ?: it.checked) }
-                .sortedBy { it.checked }
-            ShoppingListScreenState(name = shoppingList.name, items = items)
+        logger.v { "buildLoadingState() called with: loadingState = $loadingState, editingState = $editingState" }
+        return loadingState.map { data ->
+            val existingItems = data.shoppingList.items
+                .filter { it.id !in editingState.deletedItemIds }
+                .map {
+                    ShoppingListItemState.ExistingItem(
+                        item = editingState.modifiedItems[it.id] ?: it,
+                        isEditing = it.id in editingState.editingItemIds,
+                    )
+                }
+            val items = (existingItems + editingState.newItems).sortedWith(
+                compareBy(
+                    { it.checked },
+                    { it.position },
+                )
+            )
+            ShoppingListScreenState(
+                name = data.shoppingList.name,
+                listId = data.shoppingList.id,
+                items = items,
+                foods = data.foods.sortedBy { it.name },
+                units = data.units.sortedBy { it.name },
+            )
+        }.also {
+            logger.v { "buildLoadingState() returned: $it" }
         }
     }
 
-    fun onItemCheckedChange(item: ShoppingListItemInfo, isChecked: Boolean) {
-        logger.v { "onItemCheckedChange() called with: item = $item, isChecked = $isChecked" }
-        viewModelScope.launch {
-            checkedOverride.update { originalMap ->
-                originalMap.toMutableMap().also { newMap -> newMap[item.id] = isChecked }
-            }
-            checkedOverride.value[item.id] = isChecked
-            val result = runCatchingExceptCancel {
-                shoppingListsRepo.updateIsShoppingListItemChecked(item.id, isChecked)
-            }.onFailure {
-                logger.e(it) { "Failed to update item's checked state" }
-            }
-            _errorToShowInSnackbar = result.exceptionOrNull()
-            if (result.isSuccess) {
-                logger.v { "Item's checked state updated" }
-                doRefresh()
-            }
-            checkedOverride.update { originalMap ->
-                originalMap.toMutableMap().also { newMap -> newMap.remove(item.id) }
-            }
-        }
+    fun onItemCheckedChange(state: ShoppingListItemState.ExistingItem, isChecked: Boolean) {
+        logger.v { "onItemCheckedChange() called with: state = $state, isChecked = $isChecked" }
+        val updatedItem = state.item.copy(checked = isChecked)
+        updateItemInformation(updatedItem)
     }
 
     fun onSnackbarShown() {
@@ -126,10 +150,13 @@ internal class ShoppingListViewModel @Inject constructor(
         _errorToShowInSnackbar = null
     }
 
-    fun deleteShoppingListItem(item: ShoppingListItemInfo) {
-        logger.v { "deleteShoppingListItem() called with: item = $item" }
+    fun deleteShoppingListItem(state: ShoppingListItemState.ExistingItem) {
+        logger.v { "deleteShoppingListItem() called with: state = $state" }
+        val item = state.item
         viewModelScope.launch {
-            deletedItemIds.update { it + item.id }
+            editingStateFlow.update {
+                it.copy(deletedItemIds = it.deletedItemIds + item.id)
+            }
             val result = runCatchingExceptCancel {
                 shoppingListsRepo.deleteShoppingListItem(item.id)
             }.onFailure {
@@ -140,7 +167,121 @@ internal class ShoppingListViewModel @Inject constructor(
                 logger.v { "Item deleted" }
                 doRefresh()
             }
-            deletedItemIds.update { it - item.id }
+            editingStateFlow.update {
+                it.copy(deletedItemIds = it.deletedItemIds - item.id)
+            }
+        }
+    }
+
+    fun onEditStart(state: ShoppingListItemState.ExistingItem) {
+        logger.v { "onEditStart() called with: state = $state" }
+        val item = state.item
+        editingStateFlow.update {
+            it.copy(editingItemIds = it.editingItemIds + item.id)
+        }
+    }
+
+    fun onEditCancel(state: ShoppingListItemState.ExistingItem) {
+        logger.v { "onEditCancel() called with: state = $state" }
+        val item = state.item
+        editingStateFlow.update {
+            it.copy(editingItemIds = it.editingItemIds - item.id)
+        }
+    }
+
+    fun onEditConfirm(
+        state: ShoppingListItemState.ExistingItem,
+        input: ShoppingListItemEditorState
+    ) {
+        logger.v { "onEditConfirm() called with: state = $state, input = $input" }
+        val id = state.item.id
+        editingStateFlow.update {
+            it.copy(editingItemIds = it.editingItemIds - id)
+        }
+        val updatedItem = state.item.copy(
+            note = input.note,
+            quantity = input.quantity.toDouble(),
+            isFood = input.isFood,
+            unit = input.unit,
+            food = input.food,
+        )
+        updateItemInformation(updatedItem)
+    }
+
+    private fun updateItemInformation(updatedItem: ShoppingListItemInfo) {
+        logger.v { "updateItemInformation() called with: updatedItem = $updatedItem" }
+        val id = updatedItem.id
+        viewModelScope.launch {
+            editingStateFlow.update { state ->
+                state.copy(modifiedItems = state.modifiedItems + (id to updatedItem))
+            }
+            val result = runCatchingExceptCancel {
+                shoppingListsRepo.updateShoppingListItem(updatedItem)
+            }.onFailure {
+                logger.e(it) { "Failed to update item" }
+            }
+            _errorToShowInSnackbar = result.exceptionOrNull()
+            if (result.isSuccess) {
+                logger.v { "Item updated" }
+                doRefresh()
+            }
+            editingStateFlow.update { state ->
+                state.copy(modifiedItems = state.modifiedItems - id)
+            }
+        }
+    }
+
+    fun onAddItemClicked() {
+        logger.v { "onAddItemClicked() called" }
+        val shoppingListScreenState = loadingState.value.data ?: return
+        val maxPosition = shoppingListScreenState.items.maxOfOrNull { it.position } ?: 0
+        val editorState = ShoppingListItemEditorState(
+            foods = shoppingListScreenState.foods,
+            units = shoppingListScreenState.units,
+            position = maxPosition + 1,
+            listId = shoppingListScreenState.listId,
+        )
+        val item = ShoppingListItemState.NewItem(editorState)
+        editingStateFlow.update {
+            it.copy(newItems = it.newItems + item)
+        }
+    }
+
+    fun onAddCancel(state: ShoppingListItemState.NewItem) {
+        logger.v { "onAddCancel() called with: state = $state" }
+        editingStateFlow.update {
+            it.copy(newItems = it.newItems - state)
+        }
+    }
+
+    fun onAddConfirm(
+        state: ShoppingListItemState.NewItem,
+    ) {
+        logger.v { "onAddConfirm() called with: state = $state" }
+        val item = state.item
+        val newItem = NewShoppingListItemInfo(
+            shoppingListId = item.listId,
+            note = item.note,
+            quantity = item.quantity.toDouble(),
+            isFood = item.isFood,
+            unit = item.unit,
+            food = item.food,
+            position = item.position,
+        )
+        viewModelScope.launch {
+            val result = runCatchingExceptCancel {
+                shoppingListsRepo.addShoppingListItem(newItem)
+            }.onFailure {
+                logger.e(it) { "Failed to add item" }
+            }
+            _errorToShowInSnackbar = result.exceptionOrNull()
+            if (result.isSuccess) {
+                logger.v { "Item added" }
+                doRefresh()
+            }
+            editingStateFlow.update {
+                it.copy(newItems = it.newItems - state)
+            }
         }
     }
 }

features/shopping_lists/src/main/kotlin/gq/kirmanak/mealient/shopping_lists/ui/composables/LazyColumnWithLoadingState.kt

@@ -7,6 +7,7 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyListScope
 import androidx.compose.material.ExperimentalMaterialApi
 import androidx.compose.material.pullrefresh.rememberPullRefreshState
+import androidx.compose.material3.FabPosition
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.SnackbarHost
 import androidx.compose.material3.SnackbarHostState
@@ -32,6 +33,8 @@ fun <T> LazyColumnWithLoadingState(
     errorToShowInSnackbar: Throwable? = null,
     onSnackbarShown: () -> Unit = {},
     onRefresh: () -> Unit = {},
+    floatingActionButton: @Composable () -> Unit = {},
+    floatingActionButtonPosition: FabPosition = FabPosition.End,
     lazyColumnContent: LazyListScope.(List<T>) -> Unit = {},
 ) {
     val refreshState = rememberPullRefreshState(
@@ -42,6 +45,8 @@ fun <T> LazyColumnWithLoadingState(
 
     Scaffold(
         modifier = modifier,
+        floatingActionButton = floatingActionButton,
+        floatingActionButtonPosition = floatingActionButtonPosition,
         snackbarHost = { SnackbarHost(snackbarHostState) },
     ) { paddingValues ->
         val innerModifier = Modifier

features/shopping_lists/src/main/res/values/strings.xml

@@ -1,12 +1,25 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-	<string name="shopping_lists_screen_cart_icon">Shopping cart</string>
-	<string name="shopping_list_screen_unknown_error">Unknown error</string>
-	<string name="shopping_list_screen_empty_list">%1$s is empty</string>
-	<string name="shopping_list_screen_delete_icon_content_description">Delete</string>
-	<string name="shopping_lists_screen_empty">No shopping lists found</string>
-	<string name="shopping_lists_screen_unauthorized_error">Authentication is required</string>
-	<string name="shopping_lists_screen_no_connection">No server connection</string>
-	<string name="shopping_lists_screen_unknown_error">Unknown error</string>
-	<string name="shopping_lists_screen_empty_button_refresh">Try again</string>
+    <string name="shopping_lists_screen_cart_icon">Shopping cart</string>
+    <string name="shopping_list_screen_unknown_error">Unknown error</string>
+    <string name="shopping_list_screen_empty_list">%1$s is empty</string>
+    <string name="shopping_list_screen_delete_icon_content_description">Delete</string>
+    <string name="shopping_list_screen_editor_quantity_label">Qty</string>
+    <string name="shopping_list_screen_editor_note_label">Note</string>
+    <string name="shopping_list_screen_editor_food_label">Food</string>
+    <string name="shopping_list_screen_editor_unit_label">Unit</string>
+    <string name="shopping_list_screen_editor_save_button">Save</string>
+    <string name="shopping_list_screen_editor_not_food_button">Not food</string>
+    <string name="shopping_list_screen_editor_food_button">Food</string>
+    <string name="shopping_list_screen_editor_cancel_button">Cancel</string>
+    <string name="shopping_list_screen_edit_icon_content_description">Edit</string>
+    <string name="shopping_list_screen_editor_checked_unit_content_description">Selected unit</string>
+    <string name="shopping_list_screen_editor_checked_food_content_description">Selected food</string>
+    <string name="shopping_list_screen_add_icon_content_description">Add item</string>
+
+    <string name="shopping_lists_screen_empty">No shopping lists found</string>
+    <string name="shopping_lists_screen_unauthorized_error">Authentication is required</string>
+    <string name="shopping_lists_screen_no_connection">No server connection</string>
+    <string name="shopping_lists_screen_unknown_error">Unknown error</string>
+    <string name="shopping_lists_screen_empty_button_refresh">Try again</string>
 </resources>

gradle/libs.versions.toml

@@ -103,6 +103,7 @@ android-material-material = { group = "com.google.android.material", name = "mat
 
 androidx-compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
 androidx-compose-material3 = { group = "androidx.compose.material3", name = "material3" }
+androidx-compose-materialIconsExtended = { group = "androidx.compose.material", name = "material-icons-extended" }
 androidx-compose-ui-toolingPreview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
 androidx-compose-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
 androidx-compose-ui-testJunit = { group = "androidx.compose.ui", name = "ui-test-junit4" }

model_mapper/src/main/kotlin/gq/kirmanak/mealient/model_mapper/ModelMapper.kt

@@ -8,8 +8,10 @@ import gq.kirmanak.mealient.datasource.models.AddRecipeInfo
 import gq.kirmanak.mealient.datasource.models.AddRecipeIngredientInfo
 import gq.kirmanak.mealient.datasource.models.AddRecipeInstructionInfo
 import gq.kirmanak.mealient.datasource.models.AddRecipeSettingsInfo
+import gq.kirmanak.mealient.datasource.models.FoodInfo
 import gq.kirmanak.mealient.datasource.models.FullRecipeInfo
 import gq.kirmanak.mealient.datasource.models.FullShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.NewShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.models.ParseRecipeURLInfo
 import gq.kirmanak.mealient.datasource.models.RecipeIngredientInfo
 import gq.kirmanak.mealient.datasource.models.RecipeInstructionInfo
@@ -19,6 +21,7 @@ import gq.kirmanak.mealient.datasource.models.ShoppingListInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListItemRecipeReferenceInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListsInfo
+import gq.kirmanak.mealient.datasource.models.UnitInfo
 import gq.kirmanak.mealient.datasource.models.VersionInfo
 import gq.kirmanak.mealient.datasource.v0.models.AddRecipeIngredientV0
 import gq.kirmanak.mealient.datasource.v0.models.AddRecipeInstructionV0
@@ -34,6 +37,8 @@ import gq.kirmanak.mealient.datasource.v1.models.AddRecipeIngredientV1
 import gq.kirmanak.mealient.datasource.v1.models.AddRecipeInstructionV1
 import gq.kirmanak.mealient.datasource.v1.models.AddRecipeSettingsV1
 import gq.kirmanak.mealient.datasource.v1.models.CreateRecipeRequestV1
+import gq.kirmanak.mealient.datasource.v1.models.CreateShoppingListItemRequestV1
+import gq.kirmanak.mealient.datasource.v1.models.GetFoodsResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetRecipeIngredientResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetRecipeInstructionResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetRecipeResponseV1
@@ -44,6 +49,7 @@ import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListItemResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListsResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListsSummaryResponseV1
+import gq.kirmanak.mealient.datasource.v1.models.GetUnitsResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.ParseRecipeURLRequestV1
 import gq.kirmanak.mealient.datasource.v1.models.UpdateRecipeRequestV1
 import gq.kirmanak.mealient.datasource.v1.models.VersionResponseV1
@@ -127,4 +133,10 @@ interface ModelMapper {
     fun toV0Instruction(addRecipeInstructionInfo: AddRecipeInstructionInfo): AddRecipeInstructionV0
 
     fun toV0Request(parseRecipeURLInfo: ParseRecipeURLInfo): ParseRecipeURLRequestV0
+
+    fun toFoodInfo(getFoodsResponseV1: GetFoodsResponseV1): List<FoodInfo>
+
+    fun toUnitInfo(getUnitsResponseV1: GetUnitsResponseV1): List<UnitInfo>
+
+    fun toV1CreateRequest(addRecipeInfo: NewShoppingListItemInfo): CreateShoppingListItemRequestV1
 }

model_mapper/src/main/kotlin/gq/kirmanak/mealient/model_mapper/ModelMapperImpl.kt

@@ -8,8 +8,10 @@ import gq.kirmanak.mealient.datasource.models.AddRecipeInfo
 import gq.kirmanak.mealient.datasource.models.AddRecipeIngredientInfo
 import gq.kirmanak.mealient.datasource.models.AddRecipeInstructionInfo
 import gq.kirmanak.mealient.datasource.models.AddRecipeSettingsInfo
+import gq.kirmanak.mealient.datasource.models.FoodInfo
 import gq.kirmanak.mealient.datasource.models.FullRecipeInfo
 import gq.kirmanak.mealient.datasource.models.FullShoppingListInfo
+import gq.kirmanak.mealient.datasource.models.NewShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.models.ParseRecipeURLInfo
 import gq.kirmanak.mealient.datasource.models.RecipeIngredientInfo
 import gq.kirmanak.mealient.datasource.models.RecipeInstructionInfo
@@ -19,6 +21,7 @@ import gq.kirmanak.mealient.datasource.models.ShoppingListInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListItemInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListItemRecipeReferenceInfo
 import gq.kirmanak.mealient.datasource.models.ShoppingListsInfo
+import gq.kirmanak.mealient.datasource.models.UnitInfo
 import gq.kirmanak.mealient.datasource.models.VersionInfo
 import gq.kirmanak.mealient.datasource.v0.models.AddRecipeIngredientV0
 import gq.kirmanak.mealient.datasource.v0.models.AddRecipeInstructionV0
@@ -34,7 +37,12 @@ import gq.kirmanak.mealient.datasource.v1.models.AddRecipeIngredientV1
 import gq.kirmanak.mealient.datasource.v1.models.AddRecipeInstructionV1
 import gq.kirmanak.mealient.datasource.v1.models.AddRecipeSettingsV1
 import gq.kirmanak.mealient.datasource.v1.models.CreateRecipeRequestV1
+import gq.kirmanak.mealient.datasource.v1.models.CreateShoppingListItemRequestV1
+import gq.kirmanak.mealient.datasource.v1.models.GetFoodResponseV1
+import gq.kirmanak.mealient.datasource.v1.models.GetFoodsResponseV1
+import gq.kirmanak.mealient.datasource.v1.models.GetRecipeIngredientFoodResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetRecipeIngredientResponseV1
+import gq.kirmanak.mealient.datasource.v1.models.GetRecipeIngredientUnitResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetRecipeInstructionResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetRecipeResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetRecipeSettingsResponseV1
@@ -44,6 +52,8 @@ import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListItemResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListsResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.GetShoppingListsSummaryResponseV1
+import gq.kirmanak.mealient.datasource.v1.models.GetUnitResponseV1
+import gq.kirmanak.mealient.datasource.v1.models.GetUnitsResponseV1
 import gq.kirmanak.mealient.datasource.v1.models.ParseRecipeURLRequestV1
 import gq.kirmanak.mealient.datasource.v1.models.UpdateRecipeRequestV1
 import gq.kirmanak.mealient.datasource.v1.models.VersionResponseV1
@@ -198,12 +208,26 @@ class ModelMapperImpl @Inject constructor() : ModelMapper {
         isFood = getShoppingListItemResponseV1.isFood,
         note = getShoppingListItemResponseV1.note,
         quantity = getShoppingListItemResponseV1.quantity,
-        unit = getShoppingListItemResponseV1.unit?.name.orEmpty(),
-        food = getShoppingListItemResponseV1.food?.name.orEmpty(),
+        unit = getShoppingListItemResponseV1.unit?.let { toUnitInfo(it) },
+        food = getShoppingListItemResponseV1.food?.let { toFoodInfo(it) },
         recipeReferences = getShoppingListItemResponseV1.recipeReferences.map { it.recipeId }
             .mapNotNull { recipes[it] }.flatten().map { toShoppingListItemRecipeReferenceInfo(it) },
     )
 
+    private fun toUnitInfo(getRecipeIngredientUnitResponseV1: GetRecipeIngredientUnitResponseV1): UnitInfo {
+        return UnitInfo(
+            name = getRecipeIngredientUnitResponseV1.name,
+            id = getRecipeIngredientUnitResponseV1.id,
+        )
+    }
+
+    private fun toFoodInfo(getRecipeIngredientFoodResponseV1: GetRecipeIngredientFoodResponseV1): FoodInfo {
+        return FoodInfo(
+            name = getRecipeIngredientFoodResponseV1.name,
+            id = getRecipeIngredientFoodResponseV1.id,
+        )
+    }
+
     override fun toShoppingListItemRecipeReferenceInfo(
         getShoppingListItemRecipeReferenceFullResponseV1: GetShoppingListItemRecipeReferenceFullResponseV1
     ) = ShoppingListItemRecipeReferenceInfo(
@@ -305,4 +329,39 @@ class ModelMapperImpl @Inject constructor() : ModelMapper {
     override fun toV0Request(parseRecipeURLInfo: ParseRecipeURLInfo) = ParseRecipeURLRequestV0(
         url = parseRecipeURLInfo.url,
     )
+
+    override fun toFoodInfo(getFoodsResponseV1: GetFoodsResponseV1): List<FoodInfo> {
+        return getFoodsResponseV1.items.map { toFoodInfo(it) }
+    }
+
+    private fun toFoodInfo(getFoodResponseV1: GetFoodResponseV1): FoodInfo {
+        return FoodInfo(
+            name = getFoodResponseV1.name,
+            id = getFoodResponseV1.id,
+        )
+    }
+
+    override fun toUnitInfo(getUnitsResponseV1: GetUnitsResponseV1): List<UnitInfo> {
+        return getUnitsResponseV1.items.map { toUnitInfo(it) }
+    }
+
+    private fun toUnitInfo(getUnitResponseV1: GetUnitResponseV1): UnitInfo {
+        return UnitInfo(
+            name = getUnitResponseV1.name,
+            id = getUnitResponseV1.id,
+        )
+    }
+
+    override fun toV1CreateRequest(addRecipeInfo: NewShoppingListItemInfo): CreateShoppingListItemRequestV1 {
+        return CreateShoppingListItemRequestV1(
+            shoppingListId = addRecipeInfo.shoppingListId,
+            checked = false,
+            position = addRecipeInfo.position,
+            isFood = addRecipeInfo.isFood,
+            note = addRecipeInfo.note,
+            quantity = addRecipeInfo.quantity,
+            foodId = addRecipeInfo.food?.id,
+            unitId = addRecipeInfo.unit?.id,
+        )
+    }
 }