wisemapping-frontend/packages/mindplot/lib/components/commands/DeleteCommand.js

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/*
* Copyright [2015] [wisemapping]
*
* Licensed under WiseMapping Public License, Version 1.0 (the "License").
* It is basically the Apache License, Version 2.0 (the "License") plus the
* "powered by wisemapping" text requirement on every single page;
* you may not use this file except in compliance with the License.
* You may obtain a copy of the license at
*
* http://www.wisemapping.org/license
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
const Command = require('../Command').default;
const DeleteCommand = new Class(/** @lends mindplot.commands.DeleteCommand */{
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Extends: Command,
/**
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* @classdesc This command class handles do/undo of deleting a topic.
* @constructs
* @param {Array<String>} topicIds ids of the topics to delete
* @param {Array<String>} relIds ids of the relationships connected to the topics
* @extends mindplot.Command
*/
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initialize(topicIds, relIds) {
$assert($defined(relIds), 'topicIds can not be null');
this.parent();
this._relIds = relIds;
this._topicIds = topicIds;
this._deletedTopicModels = [];
this._deletedRelModel = [];
this._parentTopicIds = [];
},
/**
* Overrides abstract parent method
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*/
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execute(commandContext) {
// If a parent has been selected for deletion, the children must be excluded from the delete ...
const topics = this._filterChildren(this._topicIds, commandContext);
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if (topics.length > 0) {
_.each(topics, function (topic) {
// In case that it's editing text node, force close without update ...
topic.closeEditors();
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const model = topic.getModel();
// Delete relationships
const relationships = this._collectInDepthRelationships(topic);
this._deletedRelModel.append(relationships.map((rel) => rel.getModel().clone()));
_.each(relationships, (relationship) => {
commandContext.deleteRelationship(relationship);
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});
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// Store information for undo ...
const clonedModel = model.clone();
this._deletedTopicModels.push(clonedModel);
const outTopic = topic.getOutgoingConnectedTopic();
let outTopicId = null;
if (outTopic != null) {
outTopicId = outTopic.getId();
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}
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this._parentTopicIds.push(outTopicId);
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// Finally, delete the topic from the workspace...
commandContext.deleteTopic(topic);
}, this);
}
const rels = commandContext.findRelationships(this._relIds);
if (rels.length > 0) {
_.each(rels, function (rel) {
this._deletedRelModel.push(rel.getModel().clone());
commandContext.deleteRelationship(rel);
}, this);
}
},
/**
* Overrides abstract parent method
* @see {@link mindplot.Command.undoExecute}
*/
undoExecute(commandContext) {
// Add all the topics ...
_.each(this._deletedTopicModels, (model) => {
commandContext.createTopic(model);
}, this);
// Do they need to be connected ?
_.each(this._deletedTopicModels, function (topicModel, index) {
const topics = commandContext.findTopics(topicModel.getId());
const parentId = this._parentTopicIds[index];
if (parentId) {
const parentTopics = commandContext.findTopics(parentId);
commandContext.connect(topics[0], parentTopics[0]);
}
}, this);
// Add rebuild relationships ...
_.each(this._deletedRelModel, (model) => {
commandContext.addRelationship(model);
});
// Finally display the topics ...
_.each(this._deletedTopicModels, (topicModel) => {
const topics = commandContext.findTopics(topicModel.getId());
topics[0].setBranchVisibility(true);
}, this);
// Focus on last recovered topic ..
if (this._deletedTopicModels.length > 0) {
const firstTopic = this._deletedTopicModels[0];
const topic = commandContext.findTopics(firstTopic.getId())[0];
topic.setOnFocus(true);
}
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this._deletedTopicModels = [];
this._parentTopicIds = [];
this._deletedRelModel = [];
},
_filterChildren(topicIds, commandContext) {
const topics = commandContext.findTopics(topicIds);
const result = [];
_.each(topics, (topic) => {
let parent = topic.getParent();
let found = false;
while (parent != null && !found) {
found = topicIds.contains(parent.getId());
if (found) {
break;
}
parent = parent.getParent();
}
if (!found) {
result.push(topic);
}
});
return result;
},
_collectInDepthRelationships(topic) {
let result = [];
result.append(topic.getRelationships());
const children = topic.getChildren();
const rels = children.map(function (topic) {
return this._collectInDepthRelationships(topic);
}, this);
result.append(rels.flatten());
if (result.length > 0) {
// Filter for unique ...
result = result.sort((a, b) => a.getModel().getId() - b.getModel().getId());
const ret = [result[0]];
for (let i = 1; i < result.length; i++) { // start loop at 1 as element 0 can never be a duplicate
if (result[i - 1] !== result[i]) {
ret.push(result[i]);
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}
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}
result = ret;
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}
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return result;
},
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});
export default DeleteCommand;