/*
 * revert.c:  wrapper around wc revert functionality.
 *
 * ====================================================================
 *    Licensed to the Apache Software Foundation (ASF) under one
 *    or more contributor license agreements.  See the NOTICE file
 *    distributed with this work for additional information
 *    regarding copyright ownership.  The ASF licenses this file
 *    to you 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.
 * ====================================================================
 */

/* ==================================================================== */


/*** Includes. ***/

#include "svn_path.h"
#include "svn_wc.h"
#include "svn_client.h"
#include "svn_dirent_uri.h"
#include "svn_hash.h"
#include "svn_pools.h"
#include "svn_error.h"
#include "svn_time.h"
#include "svn_config.h"
#include "client.h"
#include "private/svn_wc_private.h"

#include "svn_private_config.h"


/*** Code. ***/

struct revert_with_write_lock_baton {
  const char *local_abspath;
  svn_depth_t depth;
  svn_boolean_t use_commit_times;
  const apr_array_header_t *changelists;
  svn_boolean_t clear_changelists;
  svn_boolean_t metadata_only;
  svn_boolean_t added_keep_local;
  svn_client_ctx_t *ctx;
};

/* (Note: All arguments are in the baton above.)

   Attempt to revert LOCAL_ABSPATH by calling svn_wc_revert6(), which
   see for further details.

   If the target isn't versioned, send a 'skip' notification and return
   no error.
 */
static svn_error_t *
revert(void *baton, apr_pool_t *result_pool, apr_pool_t *scratch_pool)
{
  struct revert_with_write_lock_baton *b = baton;
  svn_error_t *err;

  err = svn_wc_revert6(b->ctx->wc_ctx,
                       b->local_abspath,
                       b->depth,
                       b->use_commit_times,
                       b->changelists,
                       b->clear_changelists,
                       b->metadata_only,
                       b->added_keep_local,
                       b->ctx->cancel_func, b->ctx->cancel_baton,
                       b->ctx->notify_func2, b->ctx->notify_baton2,
                       scratch_pool);

  if (err)
    {
      /* If target isn't versioned, just send a 'skip'
         notification and move on. */
      if (err->apr_err == SVN_ERR_ENTRY_NOT_FOUND
          || err->apr_err == SVN_ERR_UNVERSIONED_RESOURCE
          || err->apr_err == SVN_ERR_WC_PATH_NOT_FOUND)
        {
          if (b->ctx->notify_func2)
            {
              svn_wc_notify_t *notify;

              notify = svn_wc_create_notify(b->local_abspath,
                                            svn_wc_notify_skip,
                                            scratch_pool);

              notify->err = err;

              b->ctx->notify_func2(b->ctx->notify_baton2,
                                   notify, scratch_pool);
            }
          svn_error_clear(err);
        }
      else
        return svn_error_trace(err);
    }

  return SVN_NO_ERROR;
}


svn_error_t *
svn_client_revert4(const apr_array_header_t *paths,
                   svn_depth_t depth,
                   const apr_array_header_t *changelists,
                   svn_boolean_t clear_changelists,
                   svn_boolean_t metadata_only,
                   svn_boolean_t added_keep_local,
                   svn_client_ctx_t *ctx,
                   apr_pool_t *pool)
{
  apr_pool_t *iterpool;
  svn_error_t *err = SVN_NO_ERROR;
  int i;
  svn_config_t *cfg;
  svn_boolean_t use_commit_times;
  struct revert_with_write_lock_baton baton;

  /* Don't even attempt to modify the working copy if any of the
   * targets look like URLs. URLs are invalid input. */
  for (i = 0; i < paths->nelts; i++)
    {
      const char *path = APR_ARRAY_IDX(paths, i, const char *);

      if (svn_path_is_url(path))
        return svn_error_createf(SVN_ERR_ILLEGAL_TARGET, NULL,
                                 _("'%s' is not a local path"), path);
    }

  cfg = ctx->config
        ? svn_hash_gets(ctx->config, SVN_CONFIG_CATEGORY_CONFIG)
        : NULL;

  SVN_ERR(svn_config_get_bool(cfg, &use_commit_times,
                              SVN_CONFIG_SECTION_MISCELLANY,
                              SVN_CONFIG_OPTION_USE_COMMIT_TIMES,
                              FALSE));

  iterpool = svn_pool_create(pool);

  for (i = 0; i < paths->nelts; i++)
    {
      const char *path = APR_ARRAY_IDX(paths, i, const char *);
      const char *local_abspath, *lock_target;
      svn_boolean_t wc_root;

      svn_pool_clear(iterpool);

      /* See if we've been asked to cancel this operation. */
      if ((ctx->cancel_func)
          && ((err = ctx->cancel_func(ctx->cancel_baton))))
        goto errorful;

      err = svn_dirent_get_absolute(&local_abspath, path, iterpool);
      if (err)
        goto errorful;

      baton.local_abspath = local_abspath;
      baton.depth = depth;
      baton.use_commit_times = use_commit_times;
      baton.changelists = changelists;
      baton.clear_changelists = clear_changelists;
      baton.metadata_only = metadata_only;
      baton.added_keep_local = added_keep_local;
      baton.ctx = ctx;

      err = svn_wc__is_wcroot(&wc_root, ctx->wc_ctx, local_abspath, iterpool);
      if (err)
        goto errorful;
      lock_target = wc_root ? local_abspath
                            : svn_dirent_dirname(local_abspath, pool);
      err = svn_wc__call_with_write_lock(revert, &baton, ctx->wc_ctx,
                                         lock_target, FALSE,
                                         iterpool, iterpool);
      if (err)
        goto errorful;
    }

 errorful:

  {
    /* Sleep to ensure timestamp integrity. */
    const char *sleep_path = NULL;

    /* Only specify a path if we are certain all paths are on the
       same filesystem */
    if (paths->nelts == 1)
      sleep_path = APR_ARRAY_IDX(paths, 0, const char *);

    svn_io_sleep_for_timestamps(sleep_path, iterpool);
  }

  svn_pool_destroy(iterpool);

  return svn_error_trace(err);
}