// Copyright (c) 2016 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.

#include "atom/browser/ui/win/jump_list.h"

#include <propkey.h>  // for PKEY_* constants

#include "base/win/scoped_co_mem.h"
#include "base/win/scoped_propvariant.h"
#include "base/win/win_util.h"

namespace {

using atom::JumpListCategory;
using atom::JumpListItem;
using atom::JumpListResult;

bool AppendTask(const JumpListItem& item, IObjectCollection* collection) {
  DCHECK(collection);

  CComPtr<IShellLink> link;
  if (FAILED(link.CoCreateInstance(CLSID_ShellLink)) ||
      FAILED(link->SetPath(item.path.value().c_str())) ||
      FAILED(link->SetArguments(item.arguments.c_str())) ||
      FAILED(link->SetDescription(item.description.c_str())))
    return false;

  if (!item.icon_path.empty() &&
      FAILED(link->SetIconLocation(item.icon_path.value().c_str(),
                                   item.icon_index)))
    return false;

  CComQIPtr<IPropertyStore> property_store(link);
  if (!base::win::SetStringValueForPropertyStore(property_store, PKEY_Title,
                                                 item.title.c_str()))
    return false;

  return SUCCEEDED(collection->AddObject(link));
}

bool AppendSeparator(IObjectCollection* collection) {
  DCHECK(collection);

  CComPtr<IShellLink> shell_link;
  if (SUCCEEDED(shell_link.CoCreateInstance(CLSID_ShellLink))) {
    CComQIPtr<IPropertyStore> property_store(shell_link);
    if (base::win::SetBooleanValueForPropertyStore(
            property_store, PKEY_AppUserModel_IsDestListSeparator, true))
      return SUCCEEDED(collection->AddObject(shell_link));
  }
  return false;
}

bool AppendFile(const JumpListItem& item, IObjectCollection* collection) {
  DCHECK(collection);

  CComPtr<IShellItem> file;
  if (SUCCEEDED(SHCreateItemFromParsingName(item.path.value().c_str(), NULL,
                                            IID_PPV_ARGS(&file))))
    return SUCCEEDED(collection->AddObject(file));

  return false;
}

bool GetShellItemFileName(IShellItem* shell_item, base::FilePath* file_name) {
  DCHECK(shell_item);
  DCHECK(file_name);

  base::win::ScopedCoMem<wchar_t> file_name_buffer;
  if (SUCCEEDED(
          shell_item->GetDisplayName(SIGDN_FILESYSPATH, &file_name_buffer))) {
    *file_name = base::FilePath(file_name_buffer.get());
    return true;
  }
  return false;
}

bool ConvertShellLinkToJumpListItem(IShellLink* shell_link,
                                    JumpListItem* item) {
  DCHECK(shell_link);
  DCHECK(item);

  item->type = JumpListItem::Type::TASK;
  wchar_t path[MAX_PATH];
  if (FAILED(shell_link->GetPath(path, arraysize(path), nullptr, 0)))
    return false;

  CComQIPtr<IPropertyStore> property_store = shell_link;
  base::win::ScopedPropVariant prop;
  if (SUCCEEDED(
          property_store->GetValue(PKEY_Link_Arguments, prop.Receive())) &&
      (prop.get().vt == VT_LPWSTR)) {
    item->arguments = prop.get().pwszVal;
  }

  if (SUCCEEDED(property_store->GetValue(PKEY_Title, prop.Receive())) &&
      (prop.get().vt == VT_LPWSTR)) {
    item->title = prop.get().pwszVal;
  }

  int icon_index;
  if (SUCCEEDED(
          shell_link->GetIconLocation(path, arraysize(path), &icon_index))) {
    item->icon_path = base::FilePath(path);
    item->icon_index = icon_index;
  }

  wchar_t item_desc[INFOTIPSIZE];
  if (SUCCEEDED(shell_link->GetDescription(item_desc, arraysize(item_desc))))
    item->description = item_desc;

  return true;
}

// Convert IObjectArray of IShellLink & IShellItem to std::vector.
void ConvertRemovedJumpListItems(IObjectArray* in,
                                 std::vector<JumpListItem>* out) {
  DCHECK(in);
  DCHECK(out);

  UINT removed_count;
  if (SUCCEEDED(in->GetCount(&removed_count) && (removed_count > 0))) {
    out->reserve(removed_count);
    JumpListItem item;
    IShellItem* shell_item;
    IShellLink* shell_link;
    for (UINT i = 0; i < removed_count; ++i) {
      if (SUCCEEDED(in->GetAt(i, IID_PPV_ARGS(&shell_item)))) {
        item.type = JumpListItem::Type::FILE;
        GetShellItemFileName(shell_item, &item.path);
        out->push_back(item);
        shell_item->Release();
      } else if (SUCCEEDED(in->GetAt(i, IID_PPV_ARGS(&shell_link)))) {
        if (ConvertShellLinkToJumpListItem(shell_link, &item))
          out->push_back(item);
        shell_link->Release();
      }
    }
  }
}

}  // namespace

namespace atom {

JumpList::JumpList(const base::string16& app_id) : app_id_(app_id) {
  destinations_.CoCreateInstance(CLSID_DestinationList);
}

bool JumpList::Begin(int* min_items, std::vector<JumpListItem>* removed_items) {
  DCHECK(destinations_);
  if (!destinations_)
    return false;

  if (FAILED(destinations_->SetAppID(app_id_.c_str())))
    return false;

  UINT min_slots;
  CComPtr<IObjectArray> removed;
  if (FAILED(destinations_->BeginList(&min_slots, IID_PPV_ARGS(&removed))))
    return false;

  if (min_items)
    *min_items = min_slots;

  if (removed_items)
    ConvertRemovedJumpListItems(removed, removed_items);

  return true;
}

bool JumpList::Abort() {
  DCHECK(destinations_);
  if (!destinations_)
    return false;

  return SUCCEEDED(destinations_->AbortList());
}

bool JumpList::Commit() {
  DCHECK(destinations_);
  if (!destinations_)
    return false;

  return SUCCEEDED(destinations_->CommitList());
}

bool JumpList::Delete() {
  DCHECK(destinations_);
  if (!destinations_)
    return false;

  return SUCCEEDED(destinations_->DeleteList(app_id_.c_str()));
}

// This method will attempt to append as many items to the Jump List as
// possible, and will return a single error code even if multiple things
// went wrong in the process. To get detailed information about what went
// wrong enable runtime logging.
JumpListResult JumpList::AppendCategory(const JumpListCategory& category) {
  DCHECK(destinations_);
  if (!destinations_)
    return JumpListResult::GENERIC_ERROR;

  if (category.items.empty())
    return JumpListResult::SUCCESS;

  CComPtr<IObjectCollection> collection;
  if (FAILED(collection.CoCreateInstance(CLSID_EnumerableObjectCollection))) {
    return JumpListResult::GENERIC_ERROR;
  }

  auto result = JumpListResult::SUCCESS;
  // Keep track of how many items were actually appended to the category.
  int appended_count = 0;
  for (const auto& item : category.items) {
    switch (item.type) {
      case JumpListItem::Type::TASK:
        if (AppendTask(item, collection))
          ++appended_count;
        else
          LOG(ERROR) << "Failed to append task '" << item.title
                     << "' "
                        "to Jump List.";
        break;

      case JumpListItem::Type::SEPARATOR:
        if (category.type == JumpListCategory::Type::TASKS) {
          if (AppendSeparator(collection))
            ++appended_count;
        } else {
          LOG(ERROR) << "Can't append separator to Jump List category "
                     << "'" << category.name << "'. "
                     << "Separators are only allowed in the standard 'Tasks' "
                        "Jump List category.";
          result = JumpListResult::CUSTOM_CATEGORY_SEPARATOR_ERROR;
        }
        break;

      case JumpListItem::Type::FILE:
        if (AppendFile(item, collection))
          ++appended_count;
        else
          LOG(ERROR) << "Failed to append '" << item.path.value()
                     << "' "
                        "to Jump List.";
        break;
    }
  }

  if (appended_count == 0)
    return result;

  if ((static_cast<size_t>(appended_count) < category.items.size()) &&
      (result == JumpListResult::SUCCESS)) {
    result = JumpListResult::GENERIC_ERROR;
  }

  CComQIPtr<IObjectArray> items(collection);

  if (category.type == JumpListCategory::Type::TASKS) {
    if (FAILED(destinations_->AddUserTasks(items))) {
      LOG(ERROR) << "Failed to append items to the standard Tasks category.";
      if (result == JumpListResult::SUCCESS)
        result = JumpListResult::GENERIC_ERROR;
    }
  } else {
    auto hr = destinations_->AppendCategory(category.name.c_str(), items);
    if (FAILED(hr)) {
      if (hr == 0x80040F03) {
        LOG(ERROR) << "Failed to append custom category "
                   << "'" << category.name << "' "
                   << "to Jump List due to missing file type registration.";
        result = JumpListResult::MISSING_FILE_TYPE_REGISTRATION_ERROR;
      } else if (hr == E_ACCESSDENIED) {
        LOG(ERROR) << "Failed to append custom category "
                   << "'" << category.name << "' "
                   << "to Jump List due to system privacy settings.";
        result = JumpListResult::CUSTOM_CATEGORY_ACCESS_DENIED_ERROR;
      } else {
        LOG(ERROR) << "Failed to append custom category "
                   << "'" << category.name << "' to Jump List.";
        if (result == JumpListResult::SUCCESS)
          result = JumpListResult::GENERIC_ERROR;
      }
    }
  }
  return result;
}

// This method will attempt to append as many categories to the Jump List
// as possible, and will return a single error code even if multiple things
// went wrong in the process. To get detailed information about what went
// wrong enable runtime logging.
JumpListResult JumpList::AppendCategories(
    const std::vector<JumpListCategory>& categories) {
  DCHECK(destinations_);
  if (!destinations_)
    return JumpListResult::GENERIC_ERROR;

  auto result = JumpListResult::SUCCESS;
  for (const auto& category : categories) {
    auto latestResult = JumpListResult::SUCCESS;
    switch (category.type) {
      case JumpListCategory::Type::TASKS:
      case JumpListCategory::Type::CUSTOM:
        latestResult = AppendCategory(category);
        break;

      case JumpListCategory::Type::RECENT:
        if (FAILED(destinations_->AppendKnownCategory(KDC_RECENT))) {
          LOG(ERROR) << "Failed to append Recent category to Jump List.";
          latestResult = JumpListResult::GENERIC_ERROR;
        }
        break;

      case JumpListCategory::Type::FREQUENT:
        if (FAILED(destinations_->AppendKnownCategory(KDC_FREQUENT))) {
          LOG(ERROR) << "Failed to append Frequent category to Jump List.";
          latestResult = JumpListResult::GENERIC_ERROR;
        }
        break;
    }
    // Keep the first non-generic error code as only one can be returned from
    // the function (so try to make it the most useful one).
    if (((result == JumpListResult::SUCCESS) ||
         (result == JumpListResult::GENERIC_ERROR)) &&
        (latestResult != JumpListResult::SUCCESS))
      result = latestResult;
  }
  return result;
}

}  // namespace atom
