/*
 * ls-cmd.c -- list a URL
 *
 * ====================================================================
 * Copyright (c) 2000-2006 CollabNet.  All rights reserved.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution.  The terms
 * are also available at http://subversion.tigris.org/license-1.html.
 * If newer versions of this license are posted there, you may use a
 * newer version instead, at your option.
 *
 * This software consists of voluntary contributions made by many
 * individuals.  For exact contribution history, see the revision
 * history and logs, available at http://subversion.tigris.org/.
 * ====================================================================
 */

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



/*** Includes. ***/

#include "svn_cmdline.h"
#include "svn_client.h"
#include "svn_error.h"
#include "svn_pools.h"
#include "svn_time.h"
#include "svn_xml.h"
#include "svn_path.h"
#include "cl.h"

#include "svn_private_config.h"

/*** Code. ***/

/* Baton used when printing directory entries. */
struct print_baton {
  svn_boolean_t verbose;
  svn_client_ctx_t *ctx;
};

/* This implements the svn_client_list_func_t API, printing a single
   directory entry in text format. */
static svn_error_t *
print_dirent(void *baton,
             const char *path,
             const svn_dirent_t *dirent,
             const svn_lock_t *lock,
             const char *abs_path,
             apr_pool_t *pool)
{
  struct print_baton *pb = baton;
  const char *entryname;

  if (pb->ctx->cancel_func)
    SVN_ERR(pb->ctx->cancel_func(pb->ctx->cancel_baton));
     
  if (strcmp(path, "") == 0)
    {
      if (dirent->kind == svn_node_file)
        entryname = svn_path_basename(abs_path, pool);
      else
        return SVN_NO_ERROR;
    }
  else
    entryname = path;

  if (pb->verbose)
    {
      apr_time_t now = apr_time_now();
      apr_time_exp_t exp_time;
      apr_status_t apr_err;
      apr_size_t size;
      char timestr[20];
      const char *sizestr, *utf8_timestr;

      /* svn_time_to_human_cstring gives us something *way* too long
         to use for this, so we have to roll our own.  We include
         the year if the entry's time is not within half a year. */
      apr_time_exp_lt(&exp_time, dirent->time);
      if (apr_time_sec(now - dirent->time) < (365 * 86400 / 2)
          && apr_time_sec(dirent->time - now) < (365 * 86400 / 2))
        {
          apr_err = apr_strftime(timestr, &size, sizeof(timestr),
                                 "%b %d %H:%M", &exp_time);
        }
      else
        {
          apr_err = apr_strftime(timestr, &size, sizeof(timestr),
                                 "%b %d  %Y", &exp_time);
        }

      /* if that failed, just zero out the string and print nothing */
      if (apr_err)
        timestr[0] = '\0';

      /* we need it in UTF-8. */
      SVN_ERR(svn_utf_cstring_to_utf8(&utf8_timestr, timestr, pool));

      sizestr = apr_psprintf(pool, "%" SVN_FILESIZE_T_FMT, dirent->size);

      SVN_ERR(svn_cmdline_printf
              (pool, "%7ld %-8.8s %c %10s %12s %s%s\n",
               dirent->created_rev,
               dirent->last_author ? dirent->last_author : " ? ",
               lock ? 'O' : ' ',
               (dirent->kind == svn_node_file) ? sizestr : "",
               utf8_timestr,
               entryname,
               (dirent->kind == svn_node_dir) ? "/" : ""));
    }
  else
    {
      SVN_ERR(svn_cmdline_printf(pool, "%s%s\n", entryname,
                                 (dirent->kind == svn_node_dir)
                                 ? "/" : ""));
    }

  return SVN_NO_ERROR;
}


static svn_error_t *
print_header_xml(apr_pool_t *pool)
{
  svn_stringbuf_t *sb = svn_stringbuf_create("", pool);

  /* <?xml version="1.0" encoding="utf-8"?> */
  svn_xml_make_header(&sb, pool);
  
  /* "<lists>" */
  svn_xml_make_open_tag(&sb, pool, svn_xml_normal, "lists", NULL);
  
  return svn_cl__error_checked_fputs(sb->data, stdout);
}


/* This implements the svn_client_list_func_t API, printing a single dirent
   in XML format. */
static svn_error_t *
print_dirent_xml(void *baton,
                 const char *path,
                 const svn_dirent_t *dirent,
                 const svn_lock_t *lock,
                 const char *abs_path,
                 apr_pool_t *pool)
{
  struct print_baton *pb = baton;
  const char *entryname;
  svn_stringbuf_t *sb;

  if (strcmp(path, "") == 0)
    {
      if (dirent->kind == svn_node_file)
        entryname = svn_path_basename(abs_path, pool);
      else
        return SVN_NO_ERROR;
    }
  else
    entryname = path;

  if (pb->ctx->cancel_func)
    SVN_ERR(pb->ctx->cancel_func(pb->ctx->cancel_baton));
     
  sb = svn_stringbuf_create("", pool);

  svn_xml_make_open_tag(&sb, pool, svn_xml_normal, "entry",
                        "kind", svn_cl__node_kind_str(dirent->kind),
                        NULL);

  svn_cl__xml_tagged_cdata(&sb, pool, "name", entryname);

  if (dirent->kind == svn_node_file)
    {
      svn_cl__xml_tagged_cdata
        (&sb, pool, "size",
         apr_psprintf(pool, "%" SVN_FILESIZE_T_FMT, dirent->size));
    }

  svn_xml_make_open_tag(&sb, pool, svn_xml_normal, "commit",
                        "revision",
                        apr_psprintf(pool, "%ld", dirent->created_rev),
                        NULL);
  svn_cl__xml_tagged_cdata(&sb, pool, "author", dirent->last_author);
  if (dirent->time)
    svn_cl__xml_tagged_cdata(&sb, pool, "date",
                             svn_time_to_cstring(dirent->time, pool));
  svn_xml_make_close_tag(&sb, pool, "commit");

  if (lock)
    {
      svn_xml_make_open_tag(&sb, pool, svn_xml_normal, "lock", NULL);
      svn_cl__xml_tagged_cdata(&sb, pool, "token", lock->token);
      svn_cl__xml_tagged_cdata(&sb, pool, "owner", lock->owner);
      svn_cl__xml_tagged_cdata(&sb, pool, "comment", lock->comment);
      svn_cl__xml_tagged_cdata(&sb, pool, "created",
                               svn_time_to_cstring(lock->creation_date,
                                                   pool));
      if (lock->expiration_date != 0)
        svn_cl__xml_tagged_cdata(&sb, pool, "expires",
                                 svn_time_to_cstring
                                 (lock->expiration_date, pool));
      svn_xml_make_close_tag(&sb, pool, "lock");
    }

  svn_xml_make_close_tag(&sb, pool, "entry");

  SVN_ERR(svn_cl__error_checked_fputs(sb->data, stdout));

  return SVN_NO_ERROR;
}


static svn_error_t *
print_footer_xml(apr_pool_t *pool)
{
  /* "</lists>" */
  svn_stringbuf_t *sb = svn_stringbuf_create("", pool);
  svn_xml_make_close_tag(&sb, pool, "lists");
  return svn_cl__error_checked_fputs(sb->data, stdout);
}


/* This implements the `svn_opt_subcommand_t' interface. */
svn_error_t *
svn_cl__list(apr_getopt_t *os,
             void *baton,
             apr_pool_t *pool)
{
  svn_cl__opt_state_t *opt_state = ((svn_cl__cmd_baton_t *) baton)->opt_state;
  svn_client_ctx_t *ctx = ((svn_cl__cmd_baton_t *) baton)->ctx;
  apr_array_header_t *targets;
  int i;
  apr_pool_t *subpool = svn_pool_create(pool); 
  apr_uint32_t dirent_fields;
  struct print_baton pb;

  SVN_ERR(svn_opt_args_to_target_array2(&targets, os, 
                                        opt_state->targets, pool));

  /* Add "." if user passed 0 arguments */
  svn_opt_push_implicit_dot_target(targets, pool);

  if (opt_state->xml)
    {
      /* The XML output contains all the information, so "--verbose"
         does not apply. */
      if (opt_state->verbose)
        return svn_error_create(SVN_ERR_CL_ARG_PARSING_ERROR, NULL,
                                _("'verbose' option invalid in XML mode"));

      /* If output is not incremental, output the XML header and wrap
         everything in a top-level element. This makes the output in
         its entirety a well-formed XML document. */
      if (! opt_state->incremental)
        SVN_ERR(print_header_xml(pool));
    }
  else
    {
      if (opt_state->incremental)
        return svn_error_create(SVN_ERR_CL_ARG_PARSING_ERROR, NULL,
                                _("'incremental' option only valid in XML "
                                  "mode"));
    }

  if (opt_state->verbose || opt_state->xml)
    dirent_fields = SVN_DIRENT_ALL;
  else
    dirent_fields = SVN_DIRENT_KIND; /* the only thing we actually need... */

  pb.ctx = ctx;
  pb.verbose = opt_state->verbose;

  /* For each target, try to list it. */
  for (i = 0; i < targets->nelts; i++)
    {
      const char *target = ((const char **) (targets->elts))[i];
      const char *truepath;
      svn_opt_revision_t peg_revision;

      svn_pool_clear(subpool);
     
      SVN_ERR(svn_cl__check_cancel(ctx->cancel_baton));

      /* Get peg revisions. */
      SVN_ERR(svn_opt_parse_path(&peg_revision, &truepath, target,
                                 subpool));

      if (opt_state->xml)
        {
          svn_stringbuf_t *sb = svn_stringbuf_create("", pool);
          svn_xml_make_open_tag(&sb, pool, svn_xml_normal, "list",
                                "path", truepath[0] == '\0' ? "." : truepath,
                                NULL);
          SVN_ERR(svn_cl__error_checked_fputs(sb->data, stdout));
        }

      SVN_ERR(svn_client_list(truepath, &peg_revision,
                              &(opt_state->start_revision),
                              opt_state->recursive, dirent_fields,
                              (opt_state->xml || opt_state->verbose),
                              opt_state->xml ? print_dirent_xml : print_dirent,
                              &pb, ctx, subpool));

      if (opt_state->xml)
        {
          svn_stringbuf_t *sb = svn_stringbuf_create("", pool);
          svn_xml_make_close_tag(&sb, pool, "list");
          SVN_ERR(svn_cl__error_checked_fputs(sb->data, stdout));
        }
    }

  svn_pool_destroy(subpool);
  
  if (opt_state->xml && ! opt_state->incremental)
    SVN_ERR(print_footer_xml(pool));

  return SVN_NO_ERROR;
}
