preparing direct loading of items

current state:
- loading of item implemented on backend
- need to post path information
- could be resolved re-using _getLocationEntities_, but that would include the full data of all items at that location, which is probably not required

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

stock/src/main/java/de/srsoftware/umbrella/stock/SqliteDb.java

@@ -211,11 +211,7 @@ public class SqliteDb extends BaseDb implements StockDb {
 			while (rs.next()) list.add(Item.of(rs));
 			rs.close();
 
-			for (var item : list){
-				rs = select(ALL).from(TABLE_ITEM_PROPERTIES).leftJoin(PROPERTY_ID,TABLE_PROPERTIES,ID).where(ITEM_ID,equal(item.id())).exec(db);
-				while (rs.next()) item.properties().add(Property.of(rs));
-				rs.close();
-			}
+			for (var item : list) loadProperties(item);
 			return list;
 		} catch (SQLException e){
 			throw databaseException("Failed to load items at {0}",location);
@@ -223,9 +219,32 @@ public class SqliteDb extends BaseDb implements StockDb {
 	}
 
 	@Override
-	public Item loadItem(long id) {
+	public Item loadProperties(Item item){
 		try {
-			var rs = select(ALL).from(TABLE_ITEMS).where(ID,equal(id)).exec(db);
+			var rs = select(ALL).from(TABLE_ITEM_PROPERTIES).leftJoin(PROPERTY_ID, TABLE_PROPERTIES, ID).where(ITEM_ID, equal(item.id())).exec(db);
+			while (rs.next()) item.properties().add(Property.of(rs));
+			rs.close();
+			return item;
+		} catch (SQLException e){
+			throw databaseException("Failed to load properties of {0}",item.name());
+		}
+	}
+
+	@Override
+	public Item loadItem(long id) {
+		var query = select(ALL).from(TABLE_ITEMS).where(ID,equal(id));
+		return loadItem(query);
+	}
+
+	@Override
+	public Item loadItem(String owner, long itemNumber) {
+		var query = select(ALL).from(TABLE_ITEMS).where(OWNER,equal(owner)).where(OWNER_NUMBER,equal(itemNumber));
+		return loadItem(query);
+	}
+
+	private Item loadItem(SelectQuery query){
+		try {
+			var rs = query.exec(db);
 			Item result = null;
 			if (rs.next()) result = Item.of(rs);
 			rs.close();

stock/src/main/java/de/srsoftware/umbrella/stock/StockDb.java

@@ -16,7 +16,9 @@ public interface StockDb {
 	Collection<Property>    listProperties();
 	Collection<DbLocation>  listUserLocations(UmbrellaUser userId);
 	Item                 	loadItem(long id);
+	Item 					loadItem(String owner, long itemNumber);
 	DbLocation          	loadLocation(long locationId);
+	Item					loadProperties(Item item);
 	long					nextItemNumberFor(Owner owner);
 	Map<String,Object>  	pathToLocation(Location location);
 	DbLocation 				save(DbLocation location);

stock/src/main/java/de/srsoftware/umbrella/stock/StockModule.java

@@ -90,6 +90,14 @@ public class StockModule extends BaseHandler implements StockService {
 			if (user.isEmpty()) return unauthorized(ex);
 			var head = path.pop();
 			return switch (head) {
+				case COMPANY -> {
+					try {
+						var company = companyService().get(Long.parseLong(path.pop()));
+						yield getItem(user.get(),company,path,ex);
+					} catch (NumberFormatException e){
+						yield super.doGet(path,ex);
+					}
+				}
 				case LOCATION -> {
 					try {
 						var location = Location.of(Long.parseLong(path.pop()));
@@ -100,6 +108,15 @@ public class StockModule extends BaseHandler implements StockService {
 				}
 				case LOCATIONS -> getLocations(path,user.get(),ex);
 				case PROPERTIES -> getProperties(ex);
+				case USER -> {
+					try {
+						var userId = Long.parseLong(path.pop());
+						if (userId != user.get().id()) throw forbidden("You are not allowed to access items of another user!");
+						yield getItem(user.get(),user.get(),path,ex);
+					} catch (NumberFormatException e){
+						yield super.doGet(path,ex);
+					}
+				}
 				case null, default -> super.doGet(path,ex);
 			};
 		} catch (UmbrellaException e){
@@ -157,6 +174,23 @@ public class StockModule extends BaseHandler implements StockService {
 		return sendContent(ex, stockDb.listChildLocations(parentId).stream().sorted(comparing(l -> l.name().toLowerCase())).map(DbLocation::toMap));
 	}
 
+	private boolean getItem(UmbrellaUser user, Owner owner, Path path, HttpExchange ex) throws IOException {
+		if (!assigned(owner,user)) throw forbidden("You are not allowed to access items of {0}",owner);
+		return switch (path.pop()){
+			case ITEM -> {
+				try {
+					var itemId = Long.parseLong(path.pop());
+					var item   = stockDb.loadItem(owner.dbCode(),itemId);
+					stockDb.loadProperties(item);
+					yield sendContent(ex,item);
+				} catch (NumberFormatException e) {
+					yield super.doGet(path,ex);
+				}
+			}
+			case null, default -> super.doGet(path,ex);
+		};
+	}
+
 	private boolean getLocationEntities(Location location, HttpExchange ex) throws IOException {
 		var items = stockDb.listItemsAt(location).stream().map(Item::toMap).toList();
 		var owner = location.resolve().owner();