improved tag handling

core/src/main/java/de/srsoftware/umbrella/core/api/TagService.java

@@ -3,9 +3,7 @@ package de.srsoftware.umbrella.core.api;
 
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.UmbrellaUser;
-
 import java.util.Collection;
-import java.util.Set;
 
 public interface TagService {
 	void deleteEntity(String task, long taskId);

frontend/src/routes/project/View.svelte

@@ -9,6 +9,7 @@
     import MarkdownEditor from '../../Components/MarkdownEditor.svelte';
     import MemberEditor from '../../Components/MemberEditor.svelte';
     import StateSelector from '../../Components/StateSelector.svelte';
+    import Tags from '../tags/TagList.svelte';
     import TaskList from '../task/TaskList.svelte';
 
     let router = useTinyRouter();
@@ -190,6 +191,12 @@
             <td class="estimated_time">{estimated_time.sum} h</td>
         </tr>
         {/if}
+        <tr>
+            <th>{t('tags')}</th>
+            <td>
+                <Tags module="project" {id} user_list={null} />
+            </td>
+        </tr>
         <tr>
             <th>
                 {t('tasks')}
@@ -203,4 +210,4 @@
         </tr>
     </tbody>
 </table>
-{/if}
+{/if}

frontend/src/routes/tags/TagList.svelte

@@ -33,6 +33,7 @@
             tag = await resp.text();
             tags.push(tag);
             tags = tags.sort();
+            error = null;
         } else {
             error = await resp.text();
         }

project/src/main/java/de/srsoftware/umbrella/project/ProjectModule.java

@@ -26,7 +26,6 @@ import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.*;
 import java.io.IOException;
 import java.util.*;
-
 import org.json.JSONArray;
 import org.json.JSONObject;
 

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

@@ -2,8 +2,8 @@
 package de.srsoftware.umbrella.tags;
 
 import static de.srsoftware.tools.jdbc.Condition.equal;
+import static de.srsoftware.tools.jdbc.Condition.isNull;
 import static de.srsoftware.tools.jdbc.Query.*;
-import static de.srsoftware.tools.jdbc.Query.SelectQuery.ALL;
 import static de.srsoftware.umbrella.core.Constants.*;
 import static de.srsoftware.umbrella.core.Constants.ERROR_FAILED_CREATE_TABLE;
 import static de.srsoftware.umbrella.core.Constants.USER_ID;
@@ -14,7 +14,6 @@ import static java.text.MessageFormat.format;
 
 import de.srsoftware.tools.jdbc.Query;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
-
 import java.sql.Connection;
 import java.sql.SQLException;
 import java.util.Collection;
@@ -72,7 +71,7 @@ CREATE TABLE IF NOT EXISTS "{0}" (
 	{1} VARCHAR(255) NOT NULL,
 	{2} VARCHAR(20) NOT NULL,
 	{3} INTEGER NOT NULL,
-	{4} INTEGER NOT NULL,
+	{4} INTEGER,
 	PRIMARY KEY ({1}, {2}, {3}, {4})
 )""";
 		try {
@@ -91,6 +90,9 @@ CREATE TABLE IF NOT EXISTS "{0}" (
 			Query.delete().from(TABLE_TAGS)
 					.where(TAG,equal(tag)).where(MODULE,equal(module)).where(ID,equal(entityId)).where(USER_ID,equal(userId))
 					.execute(db);
+			Query.delete().from(TABLE_TAGS)
+					.where(TAG,equal(tag)).where(MODULE,equal(module)).where(ID,equal(entityId)).where(USER_ID,isNull())
+					.execute(db);
 			return tag;
 		} catch (SQLException e){
 			throw new UmbrellaException("Failed to delete tag {0}",tag);
@@ -119,6 +121,8 @@ CREATE TABLE IF NOT EXISTS "{0}" (
 			var tags = new HashSet<String>();
 			var rs = select(TAG).from(TABLE_TAGS).where(MODULE,equal(module)).where(ID,equal(entityId)).where(USER_ID,equal(userId)).exec(db);
 			while (rs.next()) tags.add(rs.getString(1));
+			rs = select(TAG).from(TABLE_TAGS).where(MODULE,equal(module)).where(ID,equal(entityId)).where(USER_ID,isNull()).exec(db);
+			while (rs.next()) tags.add(rs.getString(1));
 			rs.close();
 			return tags;
 		} catch (SQLException e) {

tags/src/main/java/de/srsoftware/umbrella/tags/TagModule.java

@@ -20,10 +20,9 @@ import de.srsoftware.umbrella.core.api.UserService;
 import de.srsoftware.umbrella.core.exceptions.UmbrellaException;
 import de.srsoftware.umbrella.core.model.Token;
 import de.srsoftware.umbrella.core.model.UmbrellaUser;
-import org.json.JSONArray;
-
 import java.io.IOException;
 import java.util.*;
+import org.json.JSONArray;
 
 public class TagModule extends BaseHandler implements TagService {
 	private final SqliteDb tagDb;
@@ -98,10 +97,18 @@ public class TagModule extends BaseHandler implements TagService {
 			long entityId = Long.parseLong(head);
 			var json = json(ex);
 			if (!(json.has(TAG) && json.get(TAG) instanceof String tag)) throw missingFieldException(TAG);
-			List<Long> userList = json.has(USER_LIST) && json.get(USER_LIST) instanceof JSONArray arr ?
+			List<Long> userList = null;
-					arr.toList().stream().filter(elem -> elem instanceof Number).map(elem -> (Number) elem).map(Number::longValue).toList()
+			if (!json.has(USER_LIST)) throw missingFieldException(USER_LIST);
-					: List.of(user.get().id());
+			var ul = json.isNull(USER_LIST) ? null : json.get(USER_LIST);
-			if (userList.isEmpty()) throw missingFieldException(USER_LIST);
+			if (ul instanceof JSONArray arr){
+				userList = arr.toList().stream()
+						.filter(elem -> elem instanceof Number)
+						.map(Number.class::cast)
+						.map(Number::longValue)
+						.toList();
+			} else if (ul != null) throw unprocessable("User list must be NULL or array of user ids!");
+			// userList == null → tag is shared with all users
+			if (userList != null && userList.isEmpty()) throw unprocessable("User list must not be an empty list!");
 			tag = save(module, entityId, userList, tag);
 			return sendContent(ex, tag);
 		} catch (NumberFormatException e) {