Package org.intellij.erlang.quickfixes

Source Code of org.intellij.erlang.quickfixes.ErlangExportFunctionFix

/*
* Copyright 2012-2014 Sergey Ignatov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
*/

package org.intellij.erlang.quickfixes;

import com.intellij.codeInspection.ProblemDescriptor;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.util.PsiTreeUtil;
import org.intellij.erlang.psi.*;
import org.intellij.erlang.psi.impl.ErlangElementFactory;
import org.intellij.erlang.psi.impl.ErlangPsiImplUtil;
import org.jetbrains.annotations.NotNull;

import java.util.List;

public class ErlangExportFunctionFix extends ErlangQuickFixBase {
  @NotNull
  @Override
  public String getFamilyName() {
    return "Export function";
  }

  @Override
  public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) {
    ErlangFunction function = PsiTreeUtil.getParentOfType(descriptor.getPsiElement(), ErlangFunction.class);

    if (function != null) {
      processFunction(project, function);
    }
  }

  public static void processFunction(Project project, ErlangFunction function) {
    PsiFile containingFile = function.getContainingFile();
    if (containingFile instanceof ErlangFile) {
      String exportText = ErlangPsiImplUtil.createFunctionPresentation(function);

      List<ErlangAttribute> attributes = ((ErlangFile) containingFile).getAttributes();
      for (ErlangAttribute attribute : attributes) {
        ErlangExport export = attribute.getExport();
        if (export != null) {
          ErlangExportFunctions exportFunctions = export.getExportFunctions();

          if (exportFunctions != null) {
            String replace = exportFunctions.getText().replace("[", "").replace("]", "");
            String s = replace + (!StringUtil.isEmptyOrSpaces(replace) ? ", " : "") + exportText;
            PsiElement newExportFunctions = ErlangElementFactory.createExportFromText(project, s);

            attribute.replace(newExportFunctions);
          }
          return;
        }
      }
      ErlangCompositeElement elementBefore = getAnchorElement((ErlangFile) containingFile);

      if (elementBefore != null) {
        containingFile.addBefore(ErlangElementFactory.createExportFromText(project, exportText), elementBefore);
        containingFile.addBefore(ErlangElementFactory.createLeafFromText(project, "\n\n"), elementBefore);
      }
    }
  }
}
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