private static BnfListEntry addTokenDefinition()

in src/org/intellij/grammar/refactor/BnfIntroduceTokenHandler.java [221:276]
56 lines of code
12 McCabe index (conditional complexity)

  private static BnfListEntry addTokenDefinition(Project project,
                                                 BnfFile bnfFile,
                                                 String tokenName,
                                                 String tokenText,
                                                 Set<String> tokenNames) {
    String fixedTokenName = new UniqueNameGenerator(tokenNames, null).generateUniqueName(StringUtil.notNullize(tokenName, "token"));
    String newAttrText = "tokens = [\n    " + fixedTokenName + "=" + StringUtil.notNullize(tokenText, "\"\"") + "\n  ]";
    BnfAttr newAttr = BnfElementFactory.createAttributeFromText(project, newAttrText);
    BnfAttrs attrs = ContainerUtil.getFirstItem(bnfFile.getAttributes());
    BnfAttr tokensAttr = null;
    if (attrs == null) {
      attrs = (BnfAttrs) bnfFile.addAfter(newAttr.getParent(), null);
      bnfFile.addAfter(BnfElementFactory.createLeafFromText(project, "\n"), attrs);
      tokensAttr = attrs.getAttrList().get(0);
      BnfValueList attrExpr = (BnfValueList)Objects.requireNonNull(tokensAttr.getExpression());
      return attrExpr.getListEntryList().get(0);
    }
    else {
      for (BnfAttr attr : attrs.getAttrList()) {
        if (KnownAttribute.TOKENS.getName().equals(attr.getName())) {
          tokensAttr = attr;
        }
      }
      if (tokensAttr == null) {
        List<BnfAttr> attrList = attrs.getAttrList();
        PsiElement anchor = attrList.isEmpty() ? attrs.getFirstChild() : attrList.get(attrList.size() - 1);
        newAttr = (BnfAttr) attrs.addAfter(newAttr, anchor);
        attrs.addAfter(BnfElementFactory.createLeafFromText(project, "\n  "), anchor);
        BnfValueList attrExpr = (BnfValueList)Objects.requireNonNull(newAttr.getExpression());
        return attrExpr.getListEntryList().get(0);
      }
      else {
        BnfExpression expression = tokensAttr.getExpression();
        List<BnfListEntry> entryList = expression instanceof BnfValueList ? ((BnfValueList) expression).getListEntryList() : null;
        if (entryList == null || entryList.isEmpty()) {
          tokensAttr = (BnfAttr)tokensAttr.replace(newAttr);
          BnfValueList attrExpr = (BnfValueList)Objects.requireNonNull(tokensAttr.getExpression());
          return attrExpr.getListEntryList().get(0);
        }
        else {
          for (BnfListEntry entry : entryList) {
            PsiElement id = entry.getId();
            if (id != null && id.getText().equals(tokenName)) {
              return entry;
            }
          }
          BnfValueList attrExpr = (BnfValueList)Objects.requireNonNull(newAttr.getExpression());
          BnfListEntry newValue = attrExpr.getListEntryList().get(0);
          PsiElement anchor = entryList.get(entryList.size() - 1);
          newValue = (BnfListEntry) expression.addAfter(newValue, anchor);
          expression.addAfter(BnfElementFactory.createLeafFromText(project, "\n    "), anchor);
          return newValue;
        }
      }
    }
  }