/* wydawca - automatic release submission daemon
   Copyright (C) 2007, 2008, 2009 Sergey Poznyakoff

   Wydawca is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 3 of the License, or (at your
   option) any later version.

   Wydawca is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License along
   with wydawca. If not, see <http://www.gnu.org/licenses/>. */

#include "wydawca.h"
#include "sql.h"
#include "argmatch.h"
#include <mail.h>


static struct archive_descr default_archive_descr = {
  archive_none,
  NULL,
  no_backups
};

static struct access_method *default_access_method[access_method_count];
static struct notification *default_notification = NULL;


/* safe_file_name: convert a file name possibly containig relative
   specs (../) into a safer form using only direct descendence.
   Strip trailing delimiter if present, unless it is the only character
   left. E.g.:

         /home/user/../smith   -->   /home/smith
	 /home/user/../..      -->   /
	 ../file               -->   NULL
*/
char *
safe_file_name (char *file_name)
{
  int len;
  char *p;

  if (!file_name)
    return file_name;

  len = strlen (file_name);

  /* Empty string is returned as is */
  if (len == 0)
    return file_name;

  /* delete trailing delimiter if any */
  if (len && file_name[len-1] == '/')
    file_name[len-1] = 0;

  /* Eliminate any ./ and /../ */
  for (p = strchr (file_name, '.'); p; p = strchr (p, '.'))
    {
      if (p[1] == '/' && (p == file_name || p[-1] == '/'))
	{
	  char *q, *s;

	  s = p + 2;
	  q = p;
	  while ((*q++ = *s++))
	    ;
	  continue;
	}
      else if (p[1] == '.' && (p[2] == 0 || p[2] == '/'))
	{
	  if (p == file_name)
	    return NULL;
	  if (p[-1] == '/')
	    /* found */
	    {
	      char *q, *s;

	      s = p + 2;

	      /* Find previous delimiter */
	      for (q = p-2; *q != '/' && q >= file_name; q--)
		;

	      if (q < file_name)
		{
		  q = file_name;
		  s++;
		}

	      /* Copy stuff */
	      p = q;
	      while ((*q++ = *s++))
		;
	      continue;
	    }
	}

      p++;
    }

  if (file_name[0] == 0)
    {
      file_name[0] = '/';
      file_name[1] = 0;
    }

  return file_name;
}

/* Same as safe_file_name, but returns an allocated copy. */
char *
safe_file_name_alloc (const char *file_name)
{
  char *s = xstrdup (file_name);
  char *ns = safe_file_name (s);
  if (!ns)
    free (s);
  return ns;
}

int
string_to (const char *what, const char *str,
	   const char **args, int *vals,
	   int *pret,
	   grecs_locus_t *locus)
{
  ptrdiff_t x = ARGMATCH (str, args, vals);

  if (x == (ptrdiff_t)-1)
    {
      grecs_error (locus, 0, _("unknown %s: %s"), what, str);
      return 1;
    }
  else if (x == (ptrdiff_t)-2)
    {
      grecs_error (locus, 0, _("ambiguous %s: %s"), what, str);
      return 1;
    }
  *pret = vals[x];
  return 0;
}

static const char *event_args[] = {
  "success",
  "bad-ownership",
  "bad-directive-signature",
  "bad-detached-signature",
  NULL
};

static int event_types[] = {
  ev_success,
  ev_bad_ownership,
  ev_bad_directive_signature,
  ev_bad_detached_signature
};

ARGMATCH_VERIFY (event_args, event_types);

const char *
notification_event_str (enum notification_event evt)
{
  return event_args[evt];
}

int
string_to_notification_event (grecs_locus_t *locus, const char *val,
			      enum notification_event *pret)
{
  int rc, res;
  rc = string_to ("notification event", val,
		  event_args, event_types,
		  &res,
		  locus);
  *pret = res;
  return rc;
}

static const char *target_args[] = {
  "read",
  "message",
  "admin",
  "owner",
  "user",
  NULL
};

static int target_types[] = {
  notify_read,         /* Read recipients from the message headers */
  notify_read,
  notify_admin,        /* System administrator */
  notify_owner,        /* Project admin */
  notify_user          /* User (uploader) */
};

ARGMATCH_VERIFY (target_args, target_types);

const char *
notification_target_str (enum notification_target tgt)
{
  return target_args[tgt];
}

int
string_to_notification_target (grecs_locus_t *locus, const char *val,
			       enum notification_target *pret)
{
  int rc, res;
  rc = string_to ("notification target", val,
		  target_args, target_types,
		  &res,
		  locus);
  *pret = res;
  return rc;
}


int
assert_string_arg (grecs_locus_t *locus,
		   enum grecs_callback_command cmd,
		   const grecs_value_t *value)
{
  if (cmd != grecs_callback_set_value)
    {
      grecs_error (locus, 0, _("Unexpected block statement"));
      return 1;
    }
  if (!value || value->type != GRECS_TYPE_STRING)
    {
      grecs_error (locus, 0, _("expected scalar value as a tag"));
      return 1;
    }
  return 0;
}

grecs_value_t *
get_arg (grecs_locus_t *locus, grecs_value_t *value, unsigned n, int type)
{
  if (n >= value->v.arg.c)
    {
      grecs_error (locus, 0, _("not enough arguments"));
      return NULL;
    }
  value = value->v.arg.v + n;
  if (value->type != type)
    {
      grecs_error (locus, 0, _("argument %d has wrong type"), n);
      return NULL;
    }
  return value;
}


static int
cb_mailer (enum grecs_callback_command cmd,
	   grecs_locus_t *locus,
	   void *varptr,
	   grecs_value_t *value,
	   void *cb_data)
{
  int rc;

  if (assert_string_arg (locus, cmd, value))
    return 1;
  rc = mu_mailer_create (&mailer, value->v.string);
  if (rc)
    grecs_error (locus, 0, _("cannot create mailer `%s': %s"),
		 value->v.string, mu_strerror (rc));
  return rc;
}

static int
cb_email_address (enum grecs_callback_command cmd,
		  grecs_locus_t *locus,
		  void *varptr,
		  grecs_value_t *value,
		  void *cb_data)
{
  int rc;
  mu_address_t addr = NULL;

  switch (value->type)
    {
    case GRECS_TYPE_STRING:
      rc = mu_address_create (&addr, value->v.string);
      if (rc)
	{
	  grecs_error (locus, 0, _("%s: invalid email address: %s"),
		       value->v.string, mu_strerror (rc));
	  return rc;
	}
      break;

    case GRECS_TYPE_LIST:
      {
	const void *p;
	gl_list_iterator_t itr = gl_list_iterator (value->v.list);
	
	while (gl_list_iterator_next (&itr, &p, NULL))
	  {
	    const grecs_value_t *vp = p;
	    mu_address_t a;
	    if (assert_string_arg (locus, cmd, vp))
	      return 1;

	    rc = mu_address_create (&a, vp->v.string);
	    if (rc == 0)
	      rc = mu_address_union (&addr, a);
	    else
	      {
		grecs_error (locus, 0, _("%s: invalid email address: %s"),
			     vp->v.string, mu_strerror (rc));
	      }
	    mu_address_destroy (&a);
	    if (rc)
	      break;
	  }
      }
      break;

    case GRECS_TYPE_ARRAY:
      grecs_error (locus, 0, _("too many arguments"));
      return 1;
    }
      
  *(mu_address_t*) varptr = addr;
  return rc;
}

static int
cb_interval (enum grecs_callback_command cmd,
	     grecs_locus_t *locus,
	     void *varptr,
	     grecs_value_t *value,
	     void *cb_data)
{
  int rc;
  time_t interval;
  const char *endp;

  /* FIXME 1: Support arrays */
  if (assert_string_arg (locus, cmd, value))
    return 1;

  /* FIXME 2: Support ISO intervals? */
  rc = parse_time_interval (value->v.string, &interval, &endp);
  if (rc)
    grecs_error (locus, 0, _("unrecognized interval format (near `%s')"),
		 endp);
  else
    *(time_t*) varptr = interval;
  return 0;
}

static int
cb_absolute_name (enum grecs_callback_command cmd,
		  grecs_locus_t *locus,
		  void *varptr,
		  grecs_value_t *value,
		  void *cb_data)
{
  char *word;

  /* FIXME 1: Support arrays */
  if (assert_string_arg (locus, cmd, value))
    return 1;

  word = safe_file_name ((char*)value->v.string);
  if (!word || word[0] != '/')
    grecs_error (locus, 0, _("must be an absolute file name"));
  else
    *(char**) varptr = word;
  return 0;
}

static int
cb_set_umask (enum grecs_callback_command cmd,
	      grecs_locus_t *locus,
	      void *varptr,
	      grecs_value_t *value,
	      void *cb_data)
{
  char *p;
  mode_t m;

  if (assert_string_arg (locus, cmd, value))
    return 1;
  m = strtoul (value->v.string, &p, 8) & 0777;
  if (*p)
    grecs_error (locus, 0, _("invalid umask (near %s)"), p);
  else
    umask (m);
  return 0;
}


static const char *stat_args[] = {
  "errors",
  "warnings",
  "bad-signatures",
  "access-violations",
  "complete-triplets",
  "incomplete-triplets",
  "bad-triplets",
  "expired-triplets",
  "triplet-success",
  "uploads",
  "archives",
  "symlinks",
  "rmsymlinks",
  NULL
};

static unsigned long stat_types[] = {
  STAT_ERRORS,
  STAT_WARNINGS,
  STAT_BAD_SIGNATURE,
  STAT_ACCESS_VIOLATIONS,
  STAT_COMPLETE_TRIPLETS,
  STAT_INCOMPLETE_TRIPLETS,
  STAT_BAD_TRIPLETS,
  STAT_EXPIRED_TRIPLETS,
  STAT_TRIPLET_SUCCESS,
  STAT_UPLOADS,
  STAT_ARCHIVES,
  STAT_SYMLINKS,
  STAT_RMSYMLINKS
};

ARGMATCH_VERIFY (stat_args, stat_types);

static int
parse_single_statmask (grecs_locus_t *locus, const grecs_value_t *val,
		       unsigned long *pmask, int *invert)
{
  const char *arg;
  ptrdiff_t x;

  if (val->type != GRECS_TYPE_STRING)
    {
      grecs_error (locus, 0, _("expected scalar value but found list"));
      return 1;
    }

  arg = val->v.string;

  if (strcmp (arg, "all") == 0)
    {
      *pmask = STAT_MASK_ALL;
      *invert = 1;
      return 0;
    }
  else if (strcmp (arg, "none") == 0)
    {
      *pmask = STAT_MASK_NONE;
      *invert = 0;
      return 0;
    }

  x = ARGMATCH (arg, stat_args, stat_types);

  if (x == (ptrdiff_t)-1)
    {
      grecs_error (locus, 0, _("unknown statistics type: %s"), arg);
      return 1;
    }
  else if (x == (ptrdiff_t)-2)
    {
      grecs_error (locus, 0, _("ambiguous statistics type: %s"), arg);
      return 1;
    }
  *pmask = STAT_MASK (stat_types[x]);
  return 0;
}

static int
parse_statmask (grecs_locus_t *loc, grecs_value_t *val, unsigned long *pmask)
{
  int err = 0;
  int invert = 0;
  unsigned long mask = 0;

  switch (val->type)
    {
    case GRECS_TYPE_STRING:
      err = parse_single_statmask (loc, val, &mask, &invert);
      break;

    case GRECS_TYPE_ARRAY:
      {
	int i;

	for (i = 0; i < val->v.arg.c; i++)
	  {
	    unsigned long x;
	    if (parse_single_statmask (loc, &val->v.arg.v[i], &x, &invert))
	      err = 1;
	    else if (invert)
	      mask &= ~x;
	    else
	      mask |= x;
	  }
      }
      break;

    case GRECS_TYPE_LIST:
      {
	const void *p;
	gl_list_iterator_t itr = gl_list_iterator (val->v.list);

	while (gl_list_iterator_next (&itr, &p, NULL))
	  {
	    const grecs_value_t *vp = p;
	    unsigned long x;

	    if (parse_single_statmask (loc, vp, &x, &invert))
	      err = 1;
	    else if (invert)
	      mask &= ~x;
	    else
	      mask |= x;
	  }
      }
      break;
    }
  if (!err)
    *pmask = mask;
  return err;
}

static int
cb_statistics (enum grecs_callback_command cmd,
	       grecs_locus_t *locus,
	       void *varptr,
	       grecs_value_t *value,
	       void *cb_data)
{
  return parse_statmask (locus, value, varptr);
}


static int
cb_sql_host (enum grecs_callback_command cmd,
	     grecs_locus_t *locus,
	     void *varptr,
	     grecs_value_t *value,
	     void *cb_data)
{
  struct sqlconn *pconn = varptr;
  char *p;

  if (assert_string_arg (locus, cmd, value))
    return 1;

  p = strchr (value->v.string, ':');
  if (p)
    {
      /* FIXME: Modifies constant string */
      *p++ = 0;
      if (p[0] == '/')
	{
	  pconn->socket = xstrdup (p);
	  pconn->host = xstrdup ("localhost");
	}
      else
	{
	  char *end;
	  unsigned long n = strtoul (p, &end, 10);
	  if (*end)
	    {
	      grecs_error (locus, 0, _("invalid port number (near %s)"), end);
	      return 0;
	    }
	  if (n == 0 || n > USHRT_MAX)
	    {
	      grecs_error (locus, 0, _("port number out of range 1..%d"),
			   USHRT_MAX);
	      return 0;
	    }
	  pconn->port = n;
	  /* Save host name */
	  pconn->host = xstrdup (value->v.string);
	}
    }
  else
    pconn->host = xstrdup (value->v.string);
  return 0;
}

static int
cb_sql (enum grecs_callback_command cmd,
	grecs_locus_t *locus,
	void *varptr,
	grecs_value_t *value,
	void *cb_data)
{
  struct sqlconn *pconn;
  void **pdata = cb_data;

  switch (cmd) {
  case grecs_callback_section_begin:
    if (!value || value->type != GRECS_TYPE_STRING)
      {
	grecs_error(locus, 0, _("tag must be a string"));
	return 0;
      }
    pconn = xzalloc (sizeof (*pconn));
    pconn->ident = strdup (value->v.string);
    *pdata = pconn;
    break;

  case grecs_callback_section_end:
    pconn = *pdata;
    sql_register_conn (pconn);
    free (pconn);
    *pdata = NULL;
    break;

  case grecs_callback_set_value:
    grecs_error (locus, 0, _("invalid use of block statement"));
  }
  return 0;
}

static struct grecs_keyword sql_kw[] = {
  { "host", N_("host"), N_("Set SQL server hostname or IP address"),
    grecs_type_string, NULL, 0, cb_sql_host },
  { "database", N_("dbname"), N_("Set database name"),
    grecs_type_string, NULL, offsetof(struct sqlconn, database), },
  { "user", N_("name"), N_("Set SQL user name"),
    grecs_type_string, NULL, offsetof(struct sqlconn, user) },
  { "password", N_("arg"), N_("Set SQL user password"),
    grecs_type_string, NULL, offsetof(struct sqlconn, password) },
  { "ssl-ca", N_("file"), N_("File name of the Certificate Authority (CA) certificate"),
    grecs_type_string, NULL, offsetof(struct sqlconn, cacert) },
  { NULL }
};


static int
cb_syslog_facility (enum grecs_callback_command cmd,
		    grecs_locus_t *locus,
		    void *varptr,
		    grecs_value_t *value,
		    void *cb_data)
{
  if (assert_string_arg (locus, cmd, value))
    return 1;

  if (mu_string_to_syslog_facility (value->v.string, varptr))
    grecs_error (locus, 0, _("Unknown syslog facility `%s'"),
		 value->v.string);
  return 0;
}


static int
cb_define_message (enum grecs_callback_command cmd,
		   grecs_locus_t *locus,
		   void *varptr,
		   grecs_value_t *value,
		   void *cb_data)
{
  const char *ident;

  if (cmd != grecs_callback_set_value)
    {
      grecs_error (locus, 0, _("Unexpected block statement"));
      return 1;
    }
  if (!value || value->type != GRECS_TYPE_ARRAY || value->v.arg.c != 2)
    {
      grecs_error (locus, 0, _("expected two arguments"));
      return 1;
    }

  if (value->v.arg.v[0].type != GRECS_TYPE_STRING)
    {
      grecs_error (locus, 0, _("first argument not a string"));
      return 1;
    }
  ident = value->v.arg.v[0].v.string;

  if (value->v.arg.v[1].type != GRECS_TYPE_STRING)
    {
      grecs_error (locus, 0, _("second argument not a string"));
      return 1;
    }

  register_message_template (ident, value->v.arg.v[1].v.string);
  return 0;
}



static struct grecs_keyword syslog_kw[] = {
  { "facility",
    N_("name"),
    N_("Set syslog facility. Arg is one of the following: user, daemon, "
       "auth, authpriv, mail, cron, local0 through local7 (case-insensitive), "
       "or a facility number."),
    grecs_type_string, &log_facility, 0, cb_syslog_facility },
  { "tag", N_("string"), N_("Tag syslog messages with this string"),
    grecs_type_string, &syslog_tag },
  { "print-priority", N_("arg"), N_("Prefix each message with its priority"),
    grecs_type_bool, &syslog_include_prio },
  { NULL },
};


static char const * const backup_args[] =
{
  /* In a series of synonyms, present the most meaningful first, so
     that argmatch_valid be more readable. */
  "none", "off",
  "simple", "never",
  "existing", "nil",
  "numbered", "t",
  NULL
};

static const enum backup_type backup_types[] =
{
  no_backups, no_backups,
  simple_backups, simple_backups,
  numbered_existing_backups, numbered_existing_backups,
  numbered_backups, numbered_backups
};

/* Ensure that these two vectors have the same number of elements,
   not counting the final NULL in the first one.  */
ARGMATCH_VERIFY (backup_args, backup_types);

static enum backup_type
get_backup_version (grecs_locus_t *locus, const char *ctx,
		    const char *version)
{
  if (version == 0 || *version == 0)
    return numbered_existing_backups;
  else
    {
      ptrdiff_t d = ARGMATCH (version, backup_args, backup_types);
      if (d == -2)
	{
	  if (ctx)
	    grecs_error (locus, 0, _("%s: ambiguous backup type `%s'"),
			 ctx, version);
	  else
	    grecs_error (locus, 0, _("ambiguous backup type `%s'"), version);
	  return no_backups;
	}
      else if (d == -1)
	{
	  if (ctx)
	    grecs_error (locus, 0, _("%s: invalid backup type `%s'"),
			 ctx, version);
	  else
	    grecs_error (locus, 0, _("invalid backup type `%s'"), version);
	  return no_backups;
	}
      return backup_types[d];
    }
}

static int
cb_backup (enum grecs_callback_command cmd,
	   grecs_locus_t *locus,
	   void *varptr,
	   grecs_value_t *value,
	   void *cb_data)
{
  enum backup_type *ptype = varptr;

  if (assert_string_arg (locus, cmd, value))
    return 1;
  *ptype = get_backup_version (locus, NULL, value->v.string);
  return 0;
}

static struct grecs_keyword archive_kw[] = {
  { "name", N_("file-or-dir"), N_("Name of archive file or directory"),
    grecs_type_string, NULL, offsetof(struct archive_descr, name) },
  { "backup", N_("type"), N_("Define backup type"),
    grecs_type_string, NULL, offsetof(struct archive_descr, backup_type),
    cb_backup },
  { NULL }
};

static int
cb_archive (enum grecs_callback_command cmd,
	    grecs_locus_t *locus,
	    void *varptr,
	    grecs_value_t *value,
	    void *cb_data)
{
  struct archive_descr *arch = varptr;
  void **pdata = cb_data;

  switch (cmd)
    {
    case grecs_callback_section_begin:
      *pdata = arch;
      /* fallthrough */
    case grecs_callback_set_value:
      if (!value)
	{
	  grecs_error (locus, 0, _("expected tag"));
	  return 1;
	}

      if (value->type != GRECS_TYPE_STRING)
	{
	  grecs_error (locus, 0, _("expected scalar value but found list"));
	  return 1;
	}

      if (strcmp (value->v.string, "none") == 0)
	arch->type = archive_none;
      else if (strcmp (value->v.string, "tar") == 0)
	arch->type = archive_tar;
      else if (strcmp (value->v.string, "directory") == 0)
	arch->type = archive_directory;
      else
	{
	  grecs_error (locus, 0, _("unknown archive type"));
	  return 1;
	}
      if (cmd == grecs_callback_section_begin)
	return 0;
      break;

    case grecs_callback_section_end:
      break;
    }

  if (arch->type == archive_none)
    return 0;

  if (arch->name == NULL)
    {
      grecs_error (locus, 0, _("at least archive name must be set"));
      return 1;
    }

  if (arch->type == archive_tar && arch->backup_type != no_backups)
    {
      grecs_warning (locus, 0, _("backup type ignored for this archive type"));
      return 1;
    }

  return 0;
}


static struct grecs_keyword mail_statistics_kw[] = {
  { "message", N_("text"), N_("Message text"),
    grecs_type_string, &admin_stat_message },
  { "statistics",
    N_("items"), N_("Send mail if one or more of these items are set"),
    grecs_type_string, &mail_admin_mask, 0, cb_statistics },
  { "gpg-sign",
    N_("key"), N_("Sign message with this key"),
    grecs_type_string, &admin_stat_sign_key },
  { NULL }
};



static int
cb_event (enum grecs_callback_command cmd,
	  grecs_locus_t *locus,
	  void *varptr,
	  grecs_value_t *value,
	  void *cb_data)
{
  enum notification_event *pev = varptr;

  if (assert_string_arg (locus, cmd, value))
    return 1;
  string_to_notification_event (locus, value->v.string, pev);
  return 0;
}

static int
cb_recipient (enum grecs_callback_command cmd,
	      grecs_locus_t *locus,
	      void *varptr,
	      grecs_value_t *value,
	      void *cb_data)
{
  enum notification_target *tgt = varptr;

  if (assert_string_arg (locus, cmd, value))
    return 1;
  string_to_notification_target (locus, value->v.string, tgt);
  return 0;
}

static struct grecs_keyword notify_event_kw[] = {
  { "event", N_("ev-id"), N_("Event on which to notify"),
    grecs_type_string, NULL, offsetof(struct notification, ev), cb_event },
  { "recipient", N_("who"), N_("Notify this recipient"),
    grecs_type_string, NULL, offsetof(struct notification, tgt),
    cb_recipient },
  { "message", N_("text-or-id"),
    N_("Text of the notification or identifier of a defined message template"),
    grecs_type_string, NULL, offsetof(struct notification, msg) },
  { "gpg-sign", N_("key"),
    N_("Sign message with this key"),
    grecs_type_string, NULL, offsetof(struct notification, sign_keys) },
  { NULL }
};

static int
cb_notify_event (enum grecs_callback_command cmd,
		 grecs_locus_t *locus,
		 void *varptr,
		 grecs_value_t *value,
		 void *cb_data)
{
  struct notification *ntf;
  void **pdata = cb_data;

  switch (cmd) {
  case grecs_callback_section_begin:
    ntf = xzalloc (sizeof (*ntf));
    *pdata = ntf;
    break;

  case grecs_callback_section_end:
    ntf = *pdata;
    if (!ntf->msg)
      grecs_error (locus, 0, _("missing message definition"));
    else
      {
	struct notification **p = (struct notification **) varptr;
	ntf->next = *p;
	*p = ntf;
	/* FIXME: check ev and tgt? */
      }
    break;

  case grecs_callback_set_value:
    grecs_error (locus, 0, _("invalid use of block statement"));
  }
  return 0;
}



static enum access_method_type
string_to_access_method_type (const char *str)
{
  if (strcmp (str, "sql") == 0)
    return method_sql;
  else if (strcmp (str, "builtin") == 0)
    return method_builtin;
  else if (strcmp (str, "external") == 0)
    return method_external;
  else
    return method_none;
}

static int
cb_access_method_type (enum grecs_callback_command cmd,
		       grecs_locus_t *locus,
		       void *varptr,
		       grecs_value_t *value,
		       void *cb_data)
{
  enum access_method_type *ptype = varptr;

  if (assert_string_arg (locus, cmd, value))
    return 1;
  *ptype = string_to_access_method_type (value->v.string);
  if (*ptype == method_none)
    grecs_error (locus, 0, _("unknown access method: %s"), value->v.string);
  return 0;
}

static int
cb_access_method_params (enum grecs_callback_command cmd,
			 grecs_locus_t *locus,
			 void *varptr,
			 grecs_value_t *value,
			 void *cb_data)
{
  struct access_method *meth = varptr;
  size_t size;

  if (cmd != grecs_callback_set_value)
    {
      grecs_error (locus, 0, _("Unexpected block statement"));
      return 1;
    }
  if (!value || value->type != GRECS_TYPE_LIST)
    {
      grecs_error (locus, 0, _("expected list value"));
      return 1;
    }

  size = gl_list_size (value->v.list);
  if (size == 0)
    {
      meth->parmc = 0;
      meth->parmv = NULL;
    }
  else
    {
      int i;
      const void *p;
      gl_list_iterator_t itr = gl_list_iterator (value->v.list);

      meth->parmc = size;
      meth->parmv = xcalloc (size + 1, sizeof (meth->parmv[0]));

      for (i = 0; gl_list_iterator_next (&itr, &p, NULL); i++)
	{
	  const grecs_value_t *vp = p;

	  if (assert_string_arg (locus, cmd, vp))
	    break;

	  meth->parmv[i] = xstrdup (vp->v.string);
	}
      gl_list_iterator_free (&itr);
      meth->parmv[i] = NULL;
    }
  return 0;
}

static struct grecs_keyword access_method_kw[] = {
  { "type", N_("type"), N_("Method type"),
    grecs_type_string, NULL, offsetof(struct access_method, type),
    cb_access_method_type },
  { "query", N_("string"), N_("Query template"),
    grecs_type_string, NULL, offsetof(struct access_method, query) },
  { "params", N_("arg"), N_("Set method parameters"),
    grecs_type_string|GRECS_LIST, NULL, 0,
    cb_access_method_params },
  { NULL }
};

int
string_to_access_method_id (grecs_locus_t *locus,
			    const char *str, enum access_method_id *idp)
{
  static const char *id_str[] = {
    "project-uploader",
    "project-owner",
    NULL
  };
  static int id_num[] = {
    project_uploader_method,
    project_owner_method
  };
  ARGMATCH_VERIFY (id_str, id_num);

  int rc, res;
  rc = string_to ("access method", str,
		  id_str, id_num,
		  &res,
		  locus);
  *idp = res;
  return rc;
}

static int
cb_access_method (enum grecs_callback_command cmd,
		 grecs_locus_t *locus,
		 void *varptr,
		 grecs_value_t *value,
		 void *cb_data)
{
  struct access_method **pmeth, *meth;
  void **pdata = cb_data;
  enum access_method_id id;

  switch (cmd) {
  case grecs_callback_section_begin:
    if (!value || value->type != GRECS_TYPE_STRING)
      {
	grecs_error(locus, 0, _("tag must be a string"));
	return 0;
      }
    if (string_to_access_method_id (locus, value->v.string, &id))
      return 1;
    pmeth = (struct access_method **) varptr + id;
    *pmeth = method_new (id, method_builtin);
    *pdata = *pmeth;
    break;

  case grecs_callback_section_end:
    meth = *pdata;
    switch (meth->type)
      {
      case method_sql:
	if (meth->parmc == 0 || !meth->parmv[0])
	  {
	    grecs_error (locus, 0, _("SQL connection is not declared"));
	    meth->type = method_none;
	  }
	else if (!sql_connection_exists_p (meth->parmv[0]))
	  {
	    grecs_error (locus, 0, _("SQL connection `%s' not declared"),
			 meth->parmv[0]);
	    meth->type = method_none;
	  }
	break;

      default:
	/* FIXME: More checks ? */
	break;
      }
    *pdata = NULL;
    break;

  case grecs_callback_set_value:
    grecs_error (locus, 0, _("invalid use of block statement"));
  }
  return 0;
}

static int
cb_url (enum grecs_callback_command cmd,
	grecs_locus_t *locus,
	void *varptr,
	grecs_value_t *value,
	void *cb_data)
{
  mu_url_t *purl = varptr, url;
  int rc;

  if (assert_string_arg (locus, cmd, value))
    return 1;
  rc = mu_url_create (&url, value->v.string);
  if (rc)
    {
      grecs_error (locus, 0, _("cannot create URL `%s': %s"),
		   value->v.string, mu_strerror (rc));
      return rc;
    }
  rc = mu_url_parse (url);
  if (rc)
    {
      grecs_error (locus, 0, _("cannot parse URL `%s': %s"),
		   value->v.string, mu_strerror (rc));
      mu_url_destroy (&url);
      return rc;
    }
  *purl = url;
  return 0;
}


static struct grecs_keyword spool_kw[] = {
  { "url", N_("arg"), N_("URL corresponding to this spool"),
    grecs_type_string, NULL, offsetof(struct spool, url) },
  { "alias", N_("arg"), N_("Aliases"),
    grecs_type_string|GRECS_LIST, NULL, offsetof(struct spool, aliases) },
  { "source", N_("dir"), N_("Source directory"),
    grecs_type_string, NULL, offsetof(struct spool, source_dir) },
  { "destination", N_("dir"), N_("Destination directory"),
    grecs_type_string, NULL, offsetof(struct spool, dest_url),
    cb_url },
  { "file-sweep-time", N_("interval"), N_("Define file sweep time"),
    grecs_type_string, NULL, offsetof(struct spool, file_sweep_time),
    cb_interval },
  { "access-method", N_("ident"), N_("Define access method"),
    grecs_type_section, NULL, offsetof(struct spool, access_method),
    cb_access_method, NULL, access_method_kw },
  { "archive", N_("type: string"), N_("Set up archivation"),
    grecs_type_section, NULL, offsetof(struct spool, archive),
    cb_archive, NULL, archive_kw },
  { "archive-signatures", NULL, N_("Control implicit signature archivation"),
    grecs_type_bool, &archive_signatures },
  { "notify-event", NULL, N_("Configure notification"),
    grecs_type_section, NULL, offsetof(struct spool, notification),
    cb_notify_event, NULL, notify_event_kw },

  { NULL }
};

static int
cb_spool (enum grecs_callback_command cmd,
	  grecs_locus_t *locus,
	  void *varptr,
	  grecs_value_t *value,
	  void *cb_data)
{
  struct spool *spool;
  void **pdata = cb_data;
  int rc, ec, i;

  switch (cmd)
    {
    case grecs_callback_section_begin:
      if (!value || value->type != GRECS_TYPE_STRING)
	{
	  grecs_error (locus, 0, _("tag must be a string"));
	  return 1;
	}
      spool = xzalloc (sizeof (*spool));
      spool->tag = xstrdup (value->v.string);
      spool->file_sweep_time = file_sweep_time;
      for (i = 0; i < NITEMS (spool->access_method); i++)
	spool->access_method[i] = default_access_method[i];
      spool->archive = default_archive_descr;
      *pdata = spool;
      break;

    case grecs_callback_section_end:
      rc = 0;
      spool = *pdata;
      if (!spool->source_dir)
	{
	  grecs_error (locus, 0, _("source is not given"));
	  rc = 1;
	}
      else if (test_dir (spool->source_dir, &ec))
	{
	  if (ec)
	    grecs_error (locus, ec, _("cannot access %s"), spool->source_dir);
	  else
	    grecs_error (locus, 0, _("%s is not a directory"),
			 spool->source_dir);
	  rc = 1;
	}

      if (!spool->dest_url)
	{
	  grecs_error (locus, 0, _("destination is not given"));
	  rc = 1;
	}
      else if (url_to_vtab (spool->dest_url, &spool->vtab))
	{
	  grecs_error (locus, 0, _("unsupported url: %s"),
		       mu_url_to_string (spool->dest_url));
	  rc = 1;
	}
      else if (spool->vtab.test_url
	       && spool->vtab.test_url (spool->dest_url, locus))
	rc = 1;

      for (i = 0; i < access_method_count; i++)
	if (spool->access_method[i]->type == method_external)
	  {
	    grecs_error (locus, 0,
		     _("Sorry, method type `external' is not yet supported"));
	    rc = 1;
	  }

      if (rc)
	return rc;
 
      if (!spool->notification)
	spool->notification = default_notification;
      mu_url_sget_path (spool->dest_url, &spool->dest_dir);
      register_spool (spool);
      free (spool);
      *pdata = NULL;
      break;

    case grecs_callback_set_value:
      grecs_error (locus, 0, _("invalid use of block statement"));
    }
  return 0;
}


static int
cb_user (enum grecs_callback_command cmd,
	 grecs_locus_t *locus,
	 void *varptr,
	 grecs_value_t *value,
	 void *cb_data)
{
  struct passwd *pw;
  
  if (assert_string_arg (locus, cmd, value))
    return 1;

  pw = getpwnam (value->v.string);
  if (!pw)
    {
      grecs_error (locus, 0, _("no such user: %s"), value->v.string);
      return 1;
    }
  
  wydawca_uid = pw->pw_uid;
  wydawca_gid = pw->pw_gid;
  return 0;
}

static int
cb_supp_groups (enum grecs_callback_command cmd,
		grecs_locus_t *locus,
		void *varptr,
		grecs_value_t *value,
		void *cb_data)
{
  if (cmd != grecs_callback_set_value)
    {
      grecs_error (locus, 0, _("Unexpected block statement"));
      return 1;
    }
  if (!value || value->type != GRECS_TYPE_LIST)
    {
      grecs_error (locus, 0, _("expected list value"));
      return 1;
    }

  wydawca_supp_groupc = gl_list_size (value->v.list);
  if (wydawca_supp_groupc == 0)
    wydawca_supp_groups = NULL;
  else
    {
      int i;
      gl_list_iterator_t itr;
      const void *p;
      
      wydawca_supp_groups = xcalloc (wydawca_supp_groupc,
				     sizeof (wydawca_supp_groups[0]));
      itr = gl_list_iterator (value->v.list);
      for (i = 0; gl_list_iterator_next (&itr, &p, NULL); i++)
	{
	  const grecs_value_t *vp = p;
	  struct group *grp;
	  
	  if (assert_string_arg (locus, cmd, vp))
	    break;
	  grp = getgrnam (vp->v.string);
	  if (!grp)
	    {
	      grecs_error (locus, 0, _("no such group: %s"), value->v.string);
	      break;
	    }
	  wydawca_supp_groups[i] = grp->gr_gid;
	}
      gl_list_iterator_free (&itr);
    }
  return 0;
}


static struct grecs_keyword locking_kw[] = {
  { "enable", NULL, N_("Enable or disable locking"),
    grecs_type_bool, &enable_locking },
  { "directory", N_("dir"), N_("Set directory for lock files"),
    grecs_type_string, &lockdir },
  { "expire-time", N_("interval"), N_("Define lock expiration interval"),
    grecs_type_string, &lock_expire_time, 0, cb_interval },
  { "timeout", N_("interval"), N_("Locking timeout"),
    grecs_type_string, &lock_timeout, 0, cb_interval },
  { NULL }
};
  
static int
cb_locking (enum grecs_callback_command cmd,
	    grecs_locus_t *locus,
	    void *varptr,
	    grecs_value_t *value,
	    void *cb_data)
{
  if (cmd == grecs_callback_set_value)
    {
      if (!value || value->type != GRECS_TYPE_STRING)
	{
	  grecs_error (locus, 0, _("expected scalar value as a tag"));
	  return 1;
	}
      grecs_string_convert (&enable_locking, grecs_type_bool, value->v.string,
			    locus);
    }
  return 0;
}
      


static struct grecs_keyword wydawca_kw[] = {
  { "daemon", NULL, N_("Enable daemon mode"),
    grecs_type_bool, &daemon_mode },
  { "foreground", NULL, N_("Start in foreground even in daemon mode"),
    grecs_type_bool, &foreground },
  { "single-process", NULL, N_("Do not spawn subprocesses"),
    grecs_type_bool, &single_process },
  { "wakeup-interval", N_("time"), N_("Set wake-up interval"),
    grecs_type_string, &wakeup_interval, 0, cb_interval },
  { "pidfile", N_("file"), N_("Set pid file name"),
    grecs_type_string, &pidfile },

  { "user", N_("name"), N_("Run with UID and GID of this user"),
    grecs_type_string, NULL, 0, cb_user },
  { "group", NULL, N_("Retain these supplementary groups"),
    grecs_type_string|GRECS_LIST, NULL, 0, cb_supp_groups },
  
  { "locking", NULL, N_("Configure locking"),
    grecs_type_section, NULL, 0,
    cb_locking, NULL, locking_kw },
  
  { "listen", N_("socket"), N_("Listen on this address"),
    grecs_type_sockaddr, &listen_sockaddr, },

#ifdef WITH_LIBWRAP
  { "tcp-wrapper",  NULL, N_("Configure TCP wrappers"),
    grecs_type_section, NULL, 0,
    NULL, NULL, tcpwrapper_kw },
#endif
  
  { "mailer", N_("url"), N_("Set mailer URL"),
    grecs_type_string, &mailer, 0, cb_mailer },
  { "admin-address", N_("email"), N_("Set admin email address"),
    grecs_type_string, &admin_address, 0, cb_email_address },
  { "from-address", N_("email"), N_("Set sender email address"),
    grecs_type_string, &from_address, 0, cb_email_address },

  /* FIXME: Must be a built-in type? */
  { "file-sweep-time", N_("interval"), N_("Define file sweep time"),
    grecs_type_string, &file_sweep_time, 0, cb_interval },
  { "tar-program", N_("prog"), N_("Set tar invocation command line"),
    grecs_type_string, &tar_command_name, 0, cb_absolute_name },

  { "umask", N_("mask: octal"), N_("Set umask"),
    grecs_type_string, NULL, 0, cb_set_umask },

  { "statistics", N_("items"), N_("Print these stats at the end of run"),
    grecs_type_string, &print_stats, 0, cb_statistics },

  { "sql", N_("id: string"), N_("Define SQL database"),
    grecs_type_section, NULL, 0, cb_sql, NULL, sql_kw },

  { "syslog", NULL, N_("Configure syslog logging"),
    grecs_type_section, NULL, 0, NULL, NULL, syslog_kw },

  { "define-message", N_("ident: string> <text: string"),
    N_("Define message text"),
    grecs_type_string, NULL, 0, cb_define_message },

  { "archive", N_("type: string"), N_("Set up archivation"),
    grecs_type_section, &default_archive_descr, 0,
    cb_archive, NULL, archive_kw },

  { "mail-statistics", NULL, N_("Send statistics"),
    grecs_type_section, NULL, 0, NULL, NULL, mail_statistics_kw },

  { "notify-event", NULL, N_("Configure notification"),
    grecs_type_section, &default_notification, 0,
    cb_notify_event, NULL, notify_event_kw },

  { "access-method", N_("ident"), N_("Define access method"),
    grecs_type_section, default_access_method, 0,
    cb_access_method, NULL, access_method_kw },

  { "spool", N_("tag: string"), N_("Define distribution spool"),
    grecs_type_section, NULL, 0,
    cb_spool, NULL, spool_kw },

  { "all-spools", NULL, N_("Service names that request scanning all spools"),
    grecs_type_string|GRECS_LIST, &all_spool_aliases },

  { "gpg-homedir", NULL, N_("GPG home directory"),
    grecs_type_string, &wydawca_gpg_homedir },
  
  { NULL }
};

void
config_help ()
{
  static char docstring[] =
    N_("Configuration file structure for wydawca.\n"
       "For more information, use `info wydawca configuration'.");
  grecs_format_docstring (stdout, docstring, 0);
  grecs_format_statement_array (stdout, wydawca_kw, 1, 0);
}

void
config_init()
{
  int i;
  struct servent *serv;

  grecs_set_keywords (wydawca_kw);
  grecs_include_path_setup (DEFAULT_VERSION_INCLUDE_DIR,
			    DEFAULT_INCLUDE_DIR, NULL);
  grecs_preprocessor = DEFAULT_PREPROCESSOR;
  grecs_log_to_stderr = true;

  serv = getservbyname (PACKAGE, "tcp");
  if (serv != NULL)
    grecs_default_port = serv->s_port;

  for (i = 0; i < access_method_count; i++)
    default_access_method[i] = method_new (i, method_builtin);
}