/* $OpenBSD: cmd-confirm-before.c,v 1.61 2026/06/24 10:55:39 nicm Exp $ */

/*
 * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
 *
 * 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 <ctype.h>
#include <stdlib.h>
#include <string.h>

#include "tmux.h"

/*
 * Asks for confirmation before executing a command.
 */

static enum args_parse_type     cmd_confirm_before_args_parse(struct args *,
                                    u_int, char **);
static enum cmd_retval          cmd_confirm_before_exec(struct cmd *,
                                    struct cmdq_item *);

static enum prompt_result cmd_confirm_before_callback(struct client *, void *,
                    const char *, enum prompt_key_result);
static void     cmd_confirm_before_free(void *);

const struct cmd_entry cmd_confirm_before_entry = {
        .name = "confirm-before",
        .alias = "confirm",

        .args = { "bc:p:t:y", 1, 1, cmd_confirm_before_args_parse },
        .usage = "[-by] [-c confirm-key] [-p prompt] " CMD_TARGET_CLIENT_USAGE
                 " command",

        .flags = CMD_CLIENT_TFLAG,
        .exec = cmd_confirm_before_exec
};

struct cmd_confirm_before_data {
        struct cmdq_item        *item;
        struct cmd_list         *cmdlist;
        u_char                   confirm_key;
        int                      default_yes;
};

static enum args_parse_type
cmd_confirm_before_args_parse(__unused struct args *args, __unused u_int idx,
    __unused char **cause)
{
        return (ARGS_PARSE_COMMANDS_OR_STRING);
}

static enum cmd_retval
cmd_confirm_before_exec(struct cmd *self, struct cmdq_item *item)
{
        struct args                     *args = cmd_get_args(self);
        struct cmd_confirm_before_data  *cdata;
        struct client                   *tc = cmdq_get_target_client(item);
        struct cmd_find_state           *target = cmdq_get_target(item);
        char                            *new_prompt;
        const char                      *confirm_key, *prompt, *cmd;
        int                              wait = !args_has(args, 'b');

        cdata = xcalloc(1, sizeof *cdata);
        cdata->cmdlist = args_make_commands_now(self, item, 0, 1);
        if (cdata->cmdlist == NULL) {
                free(cdata);
                return (CMD_RETURN_ERROR);
        }

        if (wait)
                cdata->item = item;

        cdata->default_yes = args_has(args, 'y');
        if ((confirm_key = args_get(args, 'c')) != NULL) {
                if (confirm_key[1] == '\0' &&
                    confirm_key[0] > 31 &&
                    confirm_key[0] < 127)
                        cdata->confirm_key = confirm_key[0];
                else {
                        cmdq_error(item, "invalid confirm key");
                        cmd_list_free(cdata->cmdlist);
                        free(cdata);
                        return (CMD_RETURN_ERROR);
                }
        }
        else
                cdata->confirm_key = 'y';

        if ((prompt = args_get(args, 'p')) != NULL)
                xasprintf(&new_prompt, "%s ", prompt);
        else {
                cmd = cmd_get_entry(cmd_list_first(cdata->cmdlist))->name;
                xasprintf(&new_prompt, "Confirm '%s'? (%c/n) ", cmd,
                    cdata->confirm_key);
        }

        status_prompt_set(tc, target, new_prompt, NULL,
            cmd_confirm_before_callback, cmd_confirm_before_free, cdata,
            PROMPT_SINGLE, PROMPT_TYPE_COMMAND);
        free(new_prompt);

        if (!wait)
                return (CMD_RETURN_NORMAL);
        return (CMD_RETURN_WAIT);
}

static enum prompt_result
cmd_confirm_before_callback(struct client *c, void *data, const char *s,
    __unused enum prompt_key_result key)
{
        struct cmd_confirm_before_data  *cdata = data;
        struct cmdq_item                *item = cdata->item, *new_item;
        int                              retcode = 1;

        if (c->flags & CLIENT_DEAD)
                goto out;

        if (s == NULL)
                goto out;
        if (s[0] != cdata->confirm_key && (s[0] != '\r' || !cdata->default_yes))
                goto out;
        retcode = 0;

        if (item == NULL) {
                new_item = cmdq_get_command(cdata->cmdlist, NULL);
                cmdq_append(c, new_item);
        } else {
                new_item = cmdq_get_command(cdata->cmdlist,
                    cmdq_get_state(item));
                cmdq_insert_after(item, new_item);
        }

out:
        if (item != NULL) {
                if (cmdq_get_client(item) != NULL &&
                    cmdq_get_client(item)->session == NULL)
                        cmdq_get_client(item)->retval = retcode;
                cmdq_continue(item);
        }
        return (PROMPT_CLOSE);
}

static void
cmd_confirm_before_free(void *data)
{
        struct cmd_confirm_before_data  *cdata = data;

        cmd_list_free(cdata->cmdlist);
        free(cdata);
}