inventory activities

app/src/main/java/com/example/petstoremobile/adapters/InventoryAdapter.java

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+package com.example.petstoremobile.adapters;
+
+
+import android.graphics.Color;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+import com.example.petstoremobile.R;
+import com.example.petstoremobile.models.Inventory;
+import java.util.List;
+
+public class InventoryAdapter extends RecyclerView.Adapter<InventoryAdapter.InventoryViewHolder> {
+
+    private List<Inventory> inventoryList;
+    private OnInventoryClickListener inventoryClickListener;
+
+    // Interface for inventory click on recycler view
+    public interface OnInventoryClickListener {
+        void onInventoryClick(int position);
+    }
+
+    // Constructor
+    public InventoryAdapter(List<Inventory> inventoryList, OnInventoryClickListener inventoryClickListener) {
+        this.inventoryList = inventoryList;
+        this.inventoryClickListener = inventoryClickListener;
+    }
+
+    // Get the controls of each row in recycler view
+    public static class InventoryViewHolder extends RecyclerView.ViewHolder {
+        TextView tvItemName, tvCategory, tvQuantity, tvUnitPrice, tvSupplier;
+
+        public InventoryViewHolder(@NonNull View v) {
+            super(v);
+            tvItemName = v.findViewById(R.id.tvItemName);
+            tvCategory = v.findViewById(R.id.tvCategory);
+            tvQuantity = v.findViewById(R.id.tvQuantity);
+            tvUnitPrice = v.findViewById(R.id.tvUnitPrice);
+            tvSupplier = v.findViewById(R.id.tvInvSupplier);
+        }
+    }
+
+    // Create a new row view
+    @NonNull
+    @Override
+    public InventoryViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_inventory, parent, false);
+        return new InventoryViewHolder(v);
+    }
+
+    // Populate the row with inventory data
+    @Override
+    public void onBindViewHolder(@NonNull InventoryViewHolder holder, int position) {
+        Inventory inventory = inventoryList.get(position);
+
+        holder.tvItemName.setText(inventory.getItemName());
+        holder.tvCategory.setText(inventory.getCategory());
+        holder.tvQuantity.setText("Qty: " + inventory.getQuantity());
+        holder.tvUnitPrice.setText("$" + String.format("%.2f", inventory.getUnitPrice()));
+        holder.tvSupplier.setText("Supplier: " + inventory.getSupplier());
+
+        // Highlight low stock items in red
+        if (inventory.getQuantity() <= 5) {
+            holder.tvQuantity.setTextColor(Color.parseColor("#F44336"));
+        } else {
+            holder.tvQuantity.setTextColor(Color.parseColor("#4CAF50"));
+        }
+
+        // When a row is clicked, open the detail view
+        holder.itemView.setOnClickListener(v -> inventoryClickListener.onInventoryClick(position));
+    }
+
+    @Override
+    public int getItemCount() {
+        return inventoryList.size();
+    }
+}

app/src/main/java/com/example/petstoremobile/fragments/listfragments/InventoryFragment.java

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+package com.example.petstoremobile.fragments.listfragments;
+
+// Added search/filter bar to filter inventory by item name or category.
+// Added pull-to-refresh using SwipeRefreshLayout.
+
+import android.os.Bundle;
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.EditText;
+import com.example.petstoremobile.R;
+import com.example.petstoremobile.adapters.InventoryAdapter;
+import com.example.petstoremobile.fragments.ListFragment;
+import com.example.petstoremobile.fragments.listfragments.detailfragments.InventoryDetailFragment;
+import com.example.petstoremobile.models.Inventory;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import java.util.ArrayList;
+import java.util.List;
+
+public class InventoryFragment extends Fragment implements InventoryAdapter.OnInventoryClickListener {
+
+    private List<Inventory> inventoryList = new ArrayList<>();
+    private List<Inventory> filteredList = new ArrayList<>();
+    private InventoryAdapter adapter;
+    private SwipeRefreshLayout swipeRefreshLayout;
+    private EditText etSearch;
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_inventory, container, false);
+
+        loadInventoryData(); // TODO: Replace with actual API call when backend is ready
+        setupRecyclerView(view);
+        setupSearch(view);
+        setupSwipeRefresh(view);
+
+        FloatingActionButton fabAddInventory = view.findViewById(R.id.fabAddInventory);
+        fabAddInventory.setOnClickListener(v -> openInventoryDetails(-1));
+
+        return view;
+    }
+
+    // Filters inventory list by item name or category
+    private void setupSearch(View view) {
+        etSearch = view.findViewById(R.id.etSearchInventory);
+        etSearch.addTextChangedListener(new TextWatcher() {
+            @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
+            @Override public void onTextChanged(CharSequence s, int start, int before, int count) {
+                filterInventory(s.toString());
+            }
+            @Override public void afterTextChanged(Editable s) {}
+        });
+    }
+
+    private void filterInventory(String query) {
+        filteredList.clear();
+        if (query.isEmpty()) {
+            filteredList.addAll(inventoryList);
+        } else {
+            String lower = query.toLowerCase();
+            for (Inventory i : inventoryList) {
+                if (i.getItemName().toLowerCase().contains(lower)
+                        || i.getCategory().toLowerCase().contains(lower)
+                        || i.getSupplier().toLowerCase().contains(lower)) {
+                    filteredList.add(i);
+                }
+            }
+        }
+        adapter.notifyDataSetChanged();
+    }
+
+    private void setupSwipeRefresh(View view) {
+        swipeRefreshLayout = view.findViewById(R.id.swipeRefreshInventory);
+        swipeRefreshLayout.setOnRefreshListener(() -> {
+            loadInventoryData(); // TODO: Replace with actual API call
+            filterInventory(etSearch.getText().toString());
+            swipeRefreshLayout.setRefreshing(false);
+        });
+    }
+
+    private void openInventoryDetails(int position) {
+        InventoryDetailFragment detailFragment = new InventoryDetailFragment();
+        Bundle args = new Bundle();
+        args.putInt("position", position);
+
+        if (position != -1) {
+            Inventory inventory = filteredList.get(position);
+            int realPosition = inventoryList.indexOf(inventory);
+            args.putInt("position", realPosition);
+            args.putInt("inventoryId", inventory.getInventoryId());
+            args.putString("itemName", inventory.getItemName());
+            args.putString("category", inventory.getCategory());
+            args.putInt("quantity", inventory.getQuantity());
+            args.putDouble("unitPrice", inventory.getUnitPrice());
+            args.putString("supplier", inventory.getSupplier());
+        }
+
+        detailFragment.setArguments(args);
+        detailFragment.setInventoryFragment(this);
+
+        ListFragment listFragment = (ListFragment) getParentFragment();
+        if (listFragment != null) listFragment.loadFragment(detailFragment);
+    }
+
+    public void onInventorySaved(int position, Inventory inventory) {
+        if (position == -1) {
+            inventoryList.add(inventory);
+        } else {
+            inventoryList.set(position, inventory);
+        }
+        filterInventory(etSearch.getText().toString());
+    }
+
+    public void onInventoryDeleted(int position) {
+        inventoryList.remove(position);
+        filterInventory(etSearch.getText().toString());
+    }
+
+    @Override
+    public void onInventoryClick(int position) {
+        openInventoryDetails(position);
+    }
+
+    private void loadInventoryData() {
+        inventoryList.clear();
+        inventoryList.add(new Inventory(1, "Dog Food - Large", "Food", 50, 25.99, "PetSupplies Co."));
+        inventoryList.add(new Inventory(2, "Cat Litter", "Hygiene", 30, 12.99, "CleanPaws Ltd."));
+        inventoryList.add(new Inventory(3, "Dog Leash", "Accessories", 4, 15.99, "PetGear Inc."));
+        inventoryList.add(new Inventory(4, "Bird Cage - Medium", "Housing", 8, 79.99, "BirdWorld"));
+        inventoryList.add(new Inventory(5, "Flea Treatment", "Medicine", 2, 34.99, "VetCare Supply"));
+        filteredList.clear();
+        filteredList.addAll(inventoryList);
+    }
+
+    private void setupRecyclerView(View view) {
+        RecyclerView recyclerView = view.findViewById(R.id.recyclerViewInventory);
+        adapter = new InventoryAdapter(filteredList, this);
+        recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
+        recyclerView.setAdapter(adapter);
+    }
+}

app/src/main/java/com/example/petstoremobile/fragments/listfragments/detailfragments/InventoryDetailFragment.java

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+package com.example.petstoremobile.fragments.listfragments.detailfragments;
+
+// Uses InputValidator for detailed field validation and ActivityLogger to log all changes.
+
+import android.os.Bundle;
+import androidx.fragment.app.Fragment;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.Toast;
+import com.example.petstoremobile.R;
+import com.example.petstoremobile.fragments.ListFragment;
+import com.example.petstoremobile.fragments.listfragments.InventoryFragment;
+import com.example.petstoremobile.models.Inventory;
+import com.example.petstoremobile.utils.ActivityLogger;
+import com.example.petstoremobile.utils.InputValidator;
+
+public class InventoryDetailFragment extends Fragment {
+
+    private TextView tvMode, tvInventoryId;
+    private EditText etItemName, etCategory, etQuantity, etUnitPrice, etSupplier;
+    private Button btnSaveInventory, btnDeleteInventory, btnBack;
+    private int inventoryId;
+    private int position;
+    private boolean isEditing = false;
+    private InventoryFragment inventoryFragment;
+
+    // Set the inventory fragment as parent so we refer back when save or delete is done
+    public void setInventoryFragment(InventoryFragment fragment) {
+        this.inventoryFragment = fragment;
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_inventory_detail, container, false);
+
+        initViews(view);
+        handleArguments();
+
+        btnBack.setOnClickListener(v -> {
+            ListFragment listFragment = (ListFragment) getParentFragment();
+            if (listFragment != null) listFragment.getChildFragmentManager().popBackStack();
+        });
+        btnSaveInventory.setOnClickListener(v -> saveInventory());
+        btnDeleteInventory.setOnClickListener(v -> deleteInventory());
+
+        return view;
+    }
+
+    // Validates all fields using InputValidator, then saves the inventory item
+    private void saveInventory() {
+        if (!InputValidator.isNotEmpty(etItemName, "Item Name")) return;
+        if (!InputValidator.isNotEmpty(etCategory, "Category")) return;
+        if (!InputValidator.isPositiveInteger(etQuantity, "Quantity")) return;
+        if (!InputValidator.isPositiveDecimal(etUnitPrice, "Unit Price")) return;
+        if (!InputValidator.isNotEmpty(etSupplier, "Supplier")) return;
+
+        String itemName = etItemName.getText().toString().trim();
+        String category = etCategory.getText().toString().trim();
+        int quantity = Integer.parseInt(etQuantity.getText().toString().trim());
+        double unitPrice = Double.parseDouble(etUnitPrice.getText().toString().trim());
+        String supplier = etSupplier.getText().toString().trim();
+
+        try {
+            if (isEditing) {
+                // TODO: Replace with actual API PUT call when backend is ready
+                Inventory updated = new Inventory(inventoryId, itemName, category, quantity, unitPrice, supplier);
+                if (inventoryFragment != null) inventoryFragment.onInventorySaved(position, updated);
+                ActivityLogger.logChange(requireContext(), "Inventory", "UPDATED", inventoryId);
+                Toast.makeText(getContext(), "Inventory item updated.", Toast.LENGTH_SHORT).show();
+            } else {
+                // TODO: Replace with actual API POST call when backend is ready
+                Inventory newItem = new Inventory(0, itemName, category, quantity, unitPrice, supplier);
+                if (inventoryFragment != null) inventoryFragment.onInventorySaved(-1, newItem);
+                ActivityLogger.log(requireContext(), "Added new Inventory item: " + itemName);
+                Toast.makeText(getContext(), "Inventory item added.", Toast.LENGTH_SHORT).show();
+            }
+            ListFragment listFragment = (ListFragment) getParentFragment();
+            if (listFragment != null) listFragment.getChildFragmentManager().popBackStack();
+        } catch (Exception e) {
+            ActivityLogger.logException(requireContext(), "InventoryDetailFragment.saveInventory", e);
+            Toast.makeText(getContext(), "Error saving inventory item.", Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    // Deletes the inventory item and logs the action
+    private void deleteInventory() {
+        try {
+            // TODO: Replace with actual API DELETE call when backend is ready
+            if (inventoryFragment != null) inventoryFragment.onInventoryDeleted(position);
+            ActivityLogger.logChange(requireContext(), "Inventory", "DELETED", inventoryId);
+            Toast.makeText(getContext(), "Inventory item deleted.", Toast.LENGTH_SHORT).show();
+            ListFragment listFragment = (ListFragment) getParentFragment();
+            if (listFragment != null) listFragment.getChildFragmentManager().popBackStack();
+        } catch (Exception e) {
+            ActivityLogger.logException(requireContext(), "InventoryDetailFragment.deleteInventory", e);
+            Toast.makeText(getContext(), "Error deleting inventory item.", Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    private void handleArguments() {
+        if (getArguments() != null && getArguments().containsKey("inventoryId")) {
+            isEditing = true;
+            inventoryId = getArguments().getInt("inventoryId");
+            position = getArguments().getInt("position");
+            tvMode.setText("Edit Inventory Item");
+            tvInventoryId.setText("ID: " + inventoryId);
+            etItemName.setText(getArguments().getString("itemName"));
+            etCategory.setText(getArguments().getString("category"));
+            etQuantity.setText(String.valueOf(getArguments().getInt("quantity")));
+            etUnitPrice.setText(String.valueOf(getArguments().getDouble("unitPrice")));
+            etSupplier.setText(getArguments().getString("supplier"));
+            btnDeleteInventory.setVisibility(View.VISIBLE);
+        } else {
+            isEditing = false;
+            tvMode.setText("Add Inventory Item");
+            tvInventoryId.setVisibility(View.GONE);
+            btnDeleteInventory.setVisibility(View.GONE);
+            btnSaveInventory.setText("Add");
+        }
+    }
+
+    private void initViews(View view) {
+        tvMode = view.findViewById(R.id.tvInventoryMode);
+        tvInventoryId = view.findViewById(R.id.tvInventoryId);
+        etItemName = view.findViewById(R.id.etItemName);
+        etCategory = view.findViewById(R.id.etInventoryCategory);
+        etQuantity = view.findViewById(R.id.etQuantity);
+        etUnitPrice = view.findViewById(R.id.etUnitPrice);
+        etSupplier = view.findViewById(R.id.etInventorySupplier);
+        btnSaveInventory = view.findViewById(R.id.btnSaveInventory);
+        btnDeleteInventory = view.findViewById(R.id.btnDeleteInventory);
+        btnBack = view.findViewById(R.id.btnInventoryBack);
+    }
+}

app/src/main/res/layout/fragment_inventory.xml

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+<?xml version="1.0" encoding="utf-8"?>
+
+<!-- Updated: added search bar and SwipeRefreshLayout for pull-to-refresh -->
+<androidx.coordinatorlayout.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#F5F5F5">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <EditText
+            android:id="@+id/etSearchInventory"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_margin="8dp"
+            android:hint="Search by item name or category..."
+            android:inputType="text"
+            android:drawableStart="@android:drawable/ic_menu_search"
+            android:drawablePadding="8dp"
+            android:background="@android:color/white"
+            android:padding="12dp"/>
+
+        <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+            android:id="@+id/swipeRefreshInventory"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+            <androidx.recyclerview.widget.RecyclerView
+                android:id="@+id/recyclerViewInventory"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:padding="8dp"/>
+
+        </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
+
+    </LinearLayout>
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/fabAddInventory"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_margin="16dp"
+        android:contentDescription="Add Inventory Item"
+        app:srcCompat="@android:drawable/ic_input_add"/>
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
+

app/src/main/res/layout/fragment_inventory_detail.xml

@@ -0,0 +1,153 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#F5F5F5">
+
+    <LinearLayout
+        android:id="@+id/main"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:paddingLeft="20dp"
+        android:paddingRight="20dp"
+        android:paddingTop="20dp"
+        android:paddingBottom="20dp">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <TextView
+                android:id="@+id/tvInventoryMode"
+                android:layout_width="245dp"
+                android:layout_height="48dp"
+                android:fontFamily="sans-serif-black"
+                android:text="Add Inventory Item"
+                android:textColor="@color/text_dark"
+                android:textSize="22sp" />
+
+            <Button
+                android:id="@+id/btnDeleteInventory"
+                android:layout_width="121dp"
+                android:layout_height="wrap_content"
+                android:layout_marginLeft="20dp"
+                android:layout_weight="1"
+                android:text="Delete" />
+        </LinearLayout>
+
+        <TextView
+            android:id="@+id/tvInventoryId"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="20dp"
+            android:text="ID: 0" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="4dp"
+            android:text="Item Name"
+            android:textColor="@color/text_dark"
+            android:textSize="12sp" />
+
+        <EditText
+            android:id="@+id/etItemName"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="16dp"
+            android:hint="Enter item name"
+            android:inputType="text" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="4dp"
+            android:text="Category"
+            android:textColor="@color/text_dark"
+            android:textSize="12sp" />
+
+        <EditText
+            android:id="@+id/etInventoryCategory"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="16dp"
+            android:hint="e.g. Food, Toys, Medicine"
+            android:inputType="text" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="4dp"
+            android:text="Quantity"
+            android:textColor="@color/text_dark"
+            android:textSize="12sp" />
+
+        <EditText
+            android:id="@+id/etQuantity"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="16dp"
+            android:hint="Enter quantity"
+            android:inputType="number" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="4dp"
+            android:text="Unit Price"
+            android:textColor="@color/text_dark"
+            android:textSize="12sp" />
+
+        <EditText
+            android:id="@+id/etUnitPrice"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="16dp"
+            android:hint="Enter unit price"
+            android:inputType="numberDecimal" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="4dp"
+            android:text="Supplier"
+            android:textColor="@color/text_dark"
+            android:textSize="12sp" />
+
+        <EditText
+            android:id="@+id/etInventorySupplier"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginBottom="32dp"
+            android:hint="Enter supplier name"
+            android:inputType="text" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <Button
+                android:id="@+id/btnInventoryBack"
+                android:layout_width="121dp"
+                android:layout_height="wrap_content"
+                android:layout_marginRight="20dp"
+                android:layout_marginBottom="8dp"
+                android:layout_weight="1"
+                android:text="Back" />
+
+            <Button
+                android:id="@+id/btnSaveInventory"
+                android:layout_width="121dp"
+                android:layout_height="wrap_content"
+                android:layout_marginLeft="20dp"
+                android:layout_marginBottom="8dp"
+                android:layout_weight="1"
+                android:text="Save" />
+
+        </LinearLayout>
+
+    </LinearLayout>
+</ScrollView>