conix.c

/* Conix - Command line interface building library
 * Copyright (C) 2021 Stan Vlad <vstan02@protonmail.com>
 *
 * This file is part of Conix.
 *
 * Conix 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.
 *
 * This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
 */

#include <malloc.h>
#include <sys/cdefs.h>

#include "conix.h"
#include "options.h"

#define DEFAULT_OPTION "--default"

struct cnx_cli {
  cnx_ctx_t ctx;
  options_t options;
};

static void help(cnx_ctx_t*, cnx_cli_t*);
static void version(cnx_ctx_t*, void*);

extern cnx_cli_t* cnx_cli_init(cnx_app_t app) {
  cnx_cli_t* cli = (cnx_cli_t*) malloc(sizeof(cnx_cli_t));
  cli->ctx = (cnx_ctx_t) { app, 0, NULL };
  options_init(&cli->options, &cli->ctx);

  cnx_cli_add(cli, 3, (cnx_option_t[]) {
    { "-h, --help", "Display this information", (cnx_handle_t)help, cli },
    { "-v, --version", "Display version information", (cnx_handle_t)version, NULL },
    { "*", NULL, (cnx_handle_t)help, cli }
  });

  return cli;
}

extern void cnx_cli_free(cnx_cli_t* cli) {
  if (cli != NULL) {
    options_free(&cli->options);
    free(cli);
  }
}

extern void cnx_cli_run(cnx_cli_t* cli, size_t argc, const char* argv[]) {
  if (argc > 1) {
    cli->ctx.argc = argc - 1;
    cli->ctx.argv = argv + 1;
  }
  options_run(&cli->options, argc > 1 ? argv[1] : DEFAULT_OPTION);
}

extern void cnx_cli_add(cnx_cli_t* cli, size_t count, cnx_option_t options[]) {
  foreach(i, 0, count) {
    options_add(&cli->options, (option_t) {
      .name = options[i].name,
      .description = options[i].description,
      .payload = options[i].payload,
      .handle = (handle_t)options[i].handle
    });
  }
}

static void help(cnx_ctx_t* ctx, cnx_cli_t* cli) {
  printf("Usage: %s [options]\n\n", ctx->app.name);
  options_print(&cli->options);
}

static void version(cnx_ctx_t* ctx, __attribute_maybe_unused__ void* payload) {
  printf("%s v%s\n", ctx->app.name, ctx->app.version);
}