/* $OpenBSD$ */

/*
* Copyright (c) 2009 Tiago Cunha <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include <sys/types.h>
#include <sys/stat.h>

#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "tmux.h"

/*
* Saves a paste buffer to a file.
*/

static enum cmd_retval  cmd_save_buffer_exec(struct cmd *, struct cmdq_item *);

const struct cmd_entry cmd_save_buffer_entry = {
       .name = "save-buffer",
       .alias = "saveb",

       .args = { "ab:", 1, 1, NULL },
       .usage = "[-a] " CMD_BUFFER_USAGE " path",

       .flags = CMD_AFTERHOOK,
       .exec = cmd_save_buffer_exec
};

const struct cmd_entry cmd_show_buffer_entry = {
       .name = "show-buffer",
       .alias = "showb",

       .args = { "b:", 0, 0, NULL },
       .usage = CMD_BUFFER_USAGE,

       .flags = CMD_AFTERHOOK,
       .exec = cmd_save_buffer_exec
};

static void
cmd_save_buffer_done(__unused struct client *c, const char *path, int error,
   __unused int closed, __unused struct evbuffer *buffer, void *data)
{
       struct cmdq_item        *item = data;

       if (!closed)
               return;

       if (error != 0)
               cmdq_error(item, "%s: %s", path, strerror(error));
       cmdq_continue(item);
}

static enum cmd_retval
cmd_save_buffer_exec(struct cmd *self, struct cmdq_item *item)
{
       struct args             *args = cmd_get_args(self);
       struct client           *c = cmdq_get_client(item);
       struct paste_buffer     *pb;
       int                      flags;
       const char              *bufname = args_get(args, 'b'), *bufdata;
       size_t                   bufsize;
       char                    *path;
       struct evbuffer         *evb;

       if (bufname == NULL) {
               if ((pb = paste_get_top(NULL)) == NULL) {
                       cmdq_error(item, "no buffers");
                       return (CMD_RETURN_ERROR);
               }
       } else {
               pb = paste_get_name(bufname);
               if (pb == NULL) {
                       cmdq_error(item, "no buffer %s", bufname);
                       return (CMD_RETURN_ERROR);
               }
       }
       bufdata = paste_buffer_data(pb, &bufsize);

       if (cmd_get_entry(self) == &cmd_show_buffer_entry) {
               if (c->session != NULL || (c->flags & CLIENT_CONTROL)) {
                       evb = evbuffer_new();
                       if (evb == NULL)
                               fatalx("out of memory");
                       evbuffer_add(evb, bufdata, bufsize);
                       cmdq_print_data(item, 1, evb);
                       evbuffer_free(evb);
                       return (CMD_RETURN_NORMAL);
               }
               path = xstrdup("-");
       } else
               path = format_single_from_target(item, args_string(args, 0));
       if (args_has(args, 'a'))
               flags = O_APPEND;
       else
               flags = O_TRUNC;
       file_write(cmdq_get_client(item), path, flags, bufdata, bufsize,
           cmd_save_buffer_done, item);
       free(path);

       return (CMD_RETURN_WAIT);
}