/**
 * This CGI program renders the oper.io blog
 * Copyright (C) 2024 Aaron Ball <nullspoon@oper.io>
 *
 * This program 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 <http://www.gnu.org/licenses/>.
 */
#include "common.h"


int catfile(char* path) {
  char c = 0;
  FILE* fd = fopen(path, "r");
  if(!fd)
    return 2;

  while((c = fgetc(fd)) != EOF)
    putchar(c);

  fclose(fd);
  return 0;
}


int html_read_title(char* path, char* out) {
  char buf[TITLE_MAX];
  int start = 0;
  int end = 0;
  FILE* fd;
  fd = fopen(path, "r");
  if(!fd)
    return 2;
  fgets(buf, TITLE_MAX, fd);
  fclose(fd);

  if(strncmp(buf, "<h1", 3) != 0)
    return -1;

  // Advance to the end of the header open tag in case it has any additional
  // xml directives like class="" or style=""
  while(buf[start] != '>' && start < TITLE_MAX)
    start++;
  start++;
  end = start;

  while(buf[end] != '\0' && end < TITLE_MAX) {
    if(strncmp(&buf[end], "</h1>", 5) == 0) {
      strncpy(out, &buf[start], end - start);
      out[end] = '\0';
      return 1;
    }
    end++;
  }

  return -1;
}


char* runsh(char* cmd) {
  char buf[2048] = {'\0'};
  char* out = malloc(1);
  FILE* fd = NULL;
  unsigned long len = 0;

  fd = popen(cmd, "r");
  while(fgets(buf, 2048, fd) != NULL) {
    len += strlen(buf);
    out = realloc(out, len + 1);
    strcat(out, buf);
  }
  pclose(fd);

  if(out[len - 1] == '\n')
    out[len-1] = '\0';
  return out;
}