preparing moving of locations

core/src/main/java/de/srsoftware/umbrella/core/model/DbLocation.java

@@ -43,6 +43,11 @@ public class DbLocation extends Location {
 		return parentLocationId;
 	}
 
+	public DbLocation parent(DbLocation newParent) {
+		parentLocationId = newParent.id();
+		return this;
+	}
+
 	@Override
 	public DbLocation resolve() {
 		return this;

frontend/src/routes/stock/Index.svelte

@@ -14,6 +14,7 @@
     let item            = $state(null);
     let location        = $state(null);
     let draggedItem     = $state(null)
+    let draggedLocation = $state(null)
 
     $effect(() => {
         // This effect runs whenever `location` changes
@@ -37,6 +38,16 @@
         } else error(res);
     }
 
+    function drag_item(item){
+        draggedLocation = null;
+        draggedItem = item;
+    }
+
+    function drag_location(loc){
+        draggedItem = null;
+        draggedLocation = loc;
+    }
+
     function dropNestedLocation(locations,loc){
         for (let [idx,entry] of locations.entries()){
             if (entry.id == loc.id){
@@ -49,8 +60,9 @@
     }
 
     async function move_dragged_to(new_loc){
-        const data = { item : draggedItem.id, target: new_loc.id };
+        console.log({move_dragged_to:JSON.parse(JSON.stringify(new_loc))});
-        const url = api('stock/move_item');
+        const data = draggedItem ? { item : draggedItem.id, target: new_loc.id } : { location : draggedLocation.id, target: new_loc.id }
+        const url = api(draggedItem ? 'stock/move_item' : 'stock/move_location');
         const res = await fetch(url,{
             credentials : 'include',
             method      : 'PATCH',
@@ -118,7 +130,12 @@
         {#each top_level as realm,idx}
         <h3>{realm.name}</h3>
         {#if realm.locations}
-        <Locations locations={realm.locations} parent={realm.parent} bind:selected={location} {move_dragged_to} />
+        <Locations
+                locations={realm.locations}
+                parent={realm.parent}
+                bind:selected={location}
+                {move_dragged_to}
+                drag_start={drag_location} />
         {/if}
         {/each}
         {/if}
@@ -130,7 +147,7 @@
         {#if location}
         <h3>{location.name} <button class="symbol" title={t('delete_object',{object:t('location')})} onclick={e => deleteLocation(location)}></button></h3>
         {/if}
-        <ItemList items={data?.items.sort((a,b) => a.code.localeCompare(b.code))} bind:selected={item} drag_start={item => draggedItem = item} />
+        <ItemList items={data?.items.sort((a,b) => a.code.localeCompare(b.code))} bind:selected={item} drag_start={drag_item} />
     </div>
     <div class="properties">
         <ItemProps {item} {properties} />

frontend/src/routes/stock/Locations.svelte

@@ -5,7 +5,13 @@
 
     import LineEditor from '../../Components/LineEditor.svelte';
 
-    let { locations, move_dragged_to = new_loc => {}, parent = null, selected = $bindable(null) } = $props();
+    let {
+        drag_start = loc => console.log({dragging:loc}),
+        locations,
+        move_dragged_to = new_loc => {},
+        parent = null,
+        selected = $bindable(null)
+    } = $props();
 
     let show_location_form = $state(false);
     let new_location_name = $state(null);
@@ -102,12 +108,14 @@
     {#each locations as location}
     <li onclick={e => toggleChildren(e, location)}
         class="{location.locations?'expanded':'collapsed'} {location.highlight?'highlight':null}"
+        draggable={true}
         ondragover={e => drag_over(e,location)}
         ondrop={e => onDrop(e,location)}
-        ondragleave={e => delete location.highlight}>
+        ondragleave={e => delete location.highlight}
+        ondragstart={e => drag_start(location)} >
         <span class="name">{location.name}</span>
         {#if location.locations}
-        <svelte:self locations={location.locations} {move_dragged_to} parent={{location:location.id}} bind:selected />
+        <svelte:self locations={location.locations} {drag_start} {move_dragged_to} parent={{location:location.id}} bind:selected />
         {/if}
     </li>
     {/each}

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

@@ -13,6 +13,7 @@ public class Constants {
 	public static final String ITEMS = "items";
 	public static final String LOCATIONS = "locations";
 	public static final String MOVE_ITEM = "move_item";
+	public static final String MOVE_LOCATION = "move_location";
 	public static final String OF_USER = "of_user";
 	public static final String PARENT = "parent";
 	public static final String PROPERTY_ID = "prop_id";

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

@@ -288,7 +288,7 @@ public class SqliteDb extends BaseDb implements StockDb {
 	}
 
 	@Override
-	public Location save(DbLocation location) {
+	public DbLocation save(DbLocation location) {
 		if (location.id() == 0) {  // new location
 			try {
 				var rs = insertInto(TABLE_LOCATIONS,OWNER,PARENT_LOCATION_ID,NAME,DESCRIPTION)

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

@@ -15,7 +15,7 @@ public interface StockDb {
 	Collection<DbLocation> listUserLocations(UmbrellaUser userId);
 	Item       loadItem(long id);
 	DbLocation loadLocation(long locationId);
-	Location   save(DbLocation location);
+	DbLocation save(DbLocation location);
 	Item       save(Item item);
 	Property   setProperty(long itemId, long existingPropId, Object value);
 }

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

@@ -113,7 +113,8 @@ public class StockModule extends BaseHandler implements StockService {
 			var user = userService().loadUser(token);
 			if (user.isEmpty()) return unauthorized(ex);
 			return switch (path.pop()){
-				case MOVE_ITEM -> patchMove(user.get(), path,ex);
+				case MOVE_ITEM -> patchMoveItem(user.get(), path,ex);
+				case MOVE_LOCATION -> patchMoveLocation(user.get(), path, ex);
 				case null -> patchItem(user.get(),ex);
 				default -> super.doPatch(path,ex);
 			};
@@ -213,7 +214,7 @@ public class StockModule extends BaseHandler implements StockService {
 		return sendContent(ex,stockDb.save(item));
 	}
 
-	private boolean patchMove(UmbrellaUser user, Path path, HttpExchange ex) throws IOException {
+	private boolean patchMoveItem(UmbrellaUser user, Path path, HttpExchange ex) throws IOException {
 		var json = json(ex);
 		if (!(json.get(ITEM) instanceof Number itemId)) throw missingFieldException(ITEM);
 		if (!(json.get(TARGET) instanceof Number locationId)) throw missingFieldException(TARGET);
@@ -232,6 +233,24 @@ public class StockModule extends BaseHandler implements StockService {
 		return sendContent(ex,item);
 	}
 
+	private boolean patchMoveLocation(UmbrellaUser user, Path path, HttpExchange ex) throws IOException {
+		var json = json(ex);
+		if (!(json.get(LOCATION) instanceof Number locationId)) throw missingFieldException(LOCATION);
+		if (!(json.get(TARGET) instanceof Number destLocationId)) throw missingFieldException(TARGET);
+		var location = stockDb.loadLocation(locationId.longValue());
+
+		var owner = location.owner().resolve();
+		if (!assigned(owner,user)) throw forbidden("You are not allowed to alter the location of \"{0}\"!",location.name());
+
+		var target = stockDb.loadLocation(locationId.longValue());
+		var locOwner = target.resolve().owner().resolve();
+		if (!assigned(locOwner,user)) throw forbidden("You are not allowed to modify \"{0}\"!",target.name());
+
+		if (!locOwner.equals(owner)) throw unprocessable("You may not move locations from one owner ({0}) to another ({1})",owner,locOwner);
+		location = stockDb.save(location.parent(target));
+		return sendContent(ex,location);
+	}
+
 	private boolean postLocation(UmbrellaUser user, HttpExchange ex) throws IOException {
 		var json = json(ex);
 		if (!(json.get(NAME) instanceof String name)) throw missingFieldException(NAME);