Closes #205: action: remote tag

docs-core/src/main/java/com/sismics/docs/core/constant/ActionType.java

@@ -9,5 +9,10 @@ public enum ActionType {
     /**
      * Add a tag.
      */
-    ADD_TAG
+    ADD_TAG,
+
+    /**
+     * Remove a tag.
+     */
+    REMOVE_TAG
 }

docs-core/src/main/java/com/sismics/docs/core/util/ActionUtil.java

@@ -4,6 +4,7 @@ import com.sismics.docs.core.constant.ActionType;
 import com.sismics.docs.core.dao.jpa.dto.DocumentDto;
 import com.sismics.docs.core.util.action.Action;
 import com.sismics.docs.core.util.action.AddTagAction;
+import com.sismics.docs.core.util.action.RemoveTagAction;
 import org.slf4j.LoggerFactory;
 
 import javax.json.JsonObject;
@@ -19,6 +20,41 @@ public class ActionUtil {
      */
     private static final org.slf4j.Logger log = LoggerFactory.getLogger(LuceneUtil.class);
 
+    /**
+     * Find the action associated to an action type.
+     *
+     * @param actionType Action type
+     * @return Action
+     */
+    private static Action findAction(ActionType actionType) {
+        Action action = null;
+        switch (actionType) {
+            case ADD_TAG:
+                action = new AddTagAction();
+                break;
+            case REMOVE_TAG:
+                action = new RemoveTagAction();
+                break;
+            default:
+                log.error("Action type not handled: " + actionType);
+                break;
+        }
+
+        return action;
+    }
+
+    /**
+     * Validate an action.
+     *
+     * @param actionType Action type
+     * @param actionData Action data
+     * @throws Exception Validation error
+     */
+    public static void validateAction(ActionType actionType, JsonObject actionData) throws Exception {
+        Action action = findAction(actionType);
+        action.validate(actionData);
+    }
+
     /**
      * Execute an action.
      *
@@ -27,16 +63,7 @@ public class ActionUtil {
      * @param documentDto Document DTO
      */
     public static void executeAction(ActionType actionType, JsonObject actionData, DocumentDto documentDto) {
-        Action action;
-        switch (actionType) {
-            case ADD_TAG:
-                action = new AddTagAction();
-                break;
-            default:
-                log.error("Action type not handled: " + actionType);
-                return;
-        }
-
+        Action action = findAction(actionType);
         action.execute(documentDto, actionData);
     }
 }

docs-core/src/main/java/com/sismics/docs/core/util/action/Action.java

@@ -17,4 +17,12 @@ public interface Action {
      * @param action Action data
      */
     void execute(DocumentDto documentDto, JsonObject action);
+
+    /**
+     * Validate the action.
+     *
+     * @param action Action data
+     * @throws Exception Validation error
+     */
+    void validate(JsonObject action) throws Exception;
 }

docs-core/src/main/java/com/sismics/docs/core/util/action/AddTagAction.java

@@ -15,7 +15,7 @@ import java.util.Set;
  *
  * @author bgamard
  */
-public class AddTagAction implements Action {
+public class AddTagAction extends TagAction {
     @Override
     public void execute(DocumentDto documentDto, JsonObject action) {
         if (action.getString("tag") == null) {

docs-core/src/main/java/com/sismics/docs/core/util/action/RemoveTagAction.java

@@ -0,0 +1,37 @@
+package com.sismics.docs.core.util.action;
+
+import com.google.common.collect.Sets;
+import com.sismics.docs.core.dao.jpa.TagDao;
+import com.sismics.docs.core.dao.jpa.criteria.TagCriteria;
+import com.sismics.docs.core.dao.jpa.dto.DocumentDto;
+import com.sismics.docs.core.dao.jpa.dto.TagDto;
+
+import javax.json.JsonObject;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Action to remove a tag.
+ *
+ * @author bgamard
+ */
+public class RemoveTagAction extends TagAction {
+    @Override
+    public void execute(DocumentDto documentDto, JsonObject action) {
+        if (action.getString("tag") == null) {
+            return;
+        }
+
+
+        String tagId = action.getString("tag");
+        TagDao tagDao = new TagDao();
+        List<TagDto> tagDtoList = tagDao.findByCriteria(new TagCriteria().setDocumentId(documentDto.getId()), null);
+        Set<String> tagIdSet = Sets.newHashSet();
+        for (TagDto tagDto : tagDtoList) {
+            tagIdSet.add(tagDto.getId());
+        }
+        tagIdSet.remove(tagId);
+
+        tagDao.updateTagList(documentDto.getId(), tagIdSet);
+    }
+}

docs-core/src/main/java/com/sismics/docs/core/util/action/TagAction.java

@@ -0,0 +1,23 @@
+package com.sismics.docs.core.util.action;
+
+import com.sismics.docs.core.dao.jpa.TagDao;
+import com.sismics.docs.core.dao.jpa.criteria.TagCriteria;
+import com.sismics.docs.core.dao.jpa.dto.TagDto;
+
+import javax.json.JsonObject;
+import java.util.List;
+
+public abstract class TagAction implements Action {
+    @Override
+    public void validate(JsonObject action) throws Exception {
+        TagDao tagDao = new TagDao();
+        String tagId = action.getString("tag");
+        if (tagId == null) {
+            throw new Exception("step.transitions.actions.tag is required");
+        }
+        List<TagDto> tagDtoList = tagDao.findByCriteria(new TagCriteria().setId(tagId), null);
+        if (tagDtoList.size() != 1) {
+            throw new Exception(tagId + " is not a valid tag");
+        }
+    }
+}