dmn-js-drd/lib/features/replace/DrdReplace.js

A decision requirements diagram view for dmn-js

import { is } from 'dmn-js-shared/lib/util/ModelUtil';

/**
 * This module takes care of replacing DRD elements
 */
export default function DrdReplace(drdFactory, replace, selection, modeling) {
  /**
   * Prepares a new business object for the replacement element
   * and triggers the replace operation.
   *
   * @param  {djs.model.Base} element
   * @param  {Object} target
   * @param  {Object} [hints]
   *
   * @return {djs.model.Base} the newly created element
   */
  function replaceElement(element, target, hints) {
    hints = hints || {};
    var type = target.type,
      oldBusinessObject = element.businessObject;
    var newBusinessObject = drdFactory.create(type);
    var newElement = {
      type: type,
      businessObject: newBusinessObject
    };
    newElement.width = element.width;
    newElement.height = element.height;
    newBusinessObject.name = oldBusinessObject.name;
    if (target.table) {
      var table = drdFactory.create('dmn:DecisionTable');
      table.$parent = newBusinessObject;
      var output = drdFactory.create('dmn:OutputClause');
      output.typeRef = 'string';
      output.$parent = table;
      table.output = [output];
      var input = drdFactory.create('dmn:InputClause');
      input.$parent = table;
      var inputExpression = drdFactory.create('dmn:LiteralExpression', {
        typeRef: 'string'
      });
      input.inputExpression = inputExpression;
      inputExpression.$parent = input;
      table.input = [input];
      setBoxedExpression(newBusinessObject, table, drdFactory);
    }
    if (target.expression) {
      // variable set to element name
      var literalExpression = drdFactory.create('dmn:LiteralExpression'),
        variable = drdFactory.create('dmn:InformationItem', {
          name: oldBusinessObject.name
        });
      setBoxedExpression(newBusinessObject, literalExpression, drdFactory, variable);
    }
    return replace.replaceElement(element, newElement, hints);
  }
  this.replaceElement = replaceElement;
}
DrdReplace.$inject = ['drdFactory', 'replace', 'selection', 'modeling'];

// helper //////////////////////////////////////////////////////////////
function setBoxedExpression(bo, expression, drdFactory, variable) {
  if (is(bo, 'dmn:Decision')) {
    bo.decisionLogic = expression;
    expression.$parent = bo;
  } else if (is(bo, 'dmn:BusinessKnowledgeModel')) {
    var encapsulatedLogic = drdFactory.create('dmn:FunctionDefinition', {
      body: expression
    });
    bo.encapsulatedLogic = encapsulatedLogic;
    encapsulatedLogic.$parent = bo;
    expression.$parent = encapsulatedLogic;
  }
  if (variable) {
    bo.variable = variable;
    variable.$parent = bo;
  }
}
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