zynk/cmd_changelog.h

#ifndef CMD_CHANGELOG_H
#define CMD_CHANGELOG_H

#include "zynk.h"

/*
 * cmd_changelog - Handle the "!changelog" command.
 *
 * Reads CHANGELOG.md from the project root and displays the last N date/title
 * lines (default: CHANGELOG_COUNT). Lines starting with a date (YYYY.MM.DD)
 * are treated as entries. Accepts an optional count argument (CHANGELOG_MAX).
 * Rate-limited.
 *
 * Parameters:
 *   s            - The IRC session.
 *   msg          - The raw message text.
 *   reply_target - Channel or nick to reply to.
 *   src_nick     - The nick of the user who sent the command.
 *
 * Returns: 1 if the command was matched, 0 otherwise.
 */
int cmd_changelog(Session *s, const char *msg, const char *reply_target, const char *src_nick) {
  if (strncmp(msg, "!changelog", 10) != 0) return 0;
  if (msg[10] != ' ' && msg[10] != '\0') return 0;
  if (rate_limit_check(src_nick, reply_target, current_userhost) < 0) return 1;
  int count = CHANGELOG_COUNT;
  const char *rest = msg[10] == ' ' ? msg + 11 : "";
  while (*rest == ' ') rest++;
  if (*rest) {
    if (isdigit((unsigned char)*rest)) {
      count = atoi(rest);
      if (count <= 0) count = CHANGELOG_COUNT;
      if (count > CHANGELOG_MAX) count = CHANGELOG_MAX;
      while (*rest && isdigit((unsigned char)*rest)) rest++;
      while (*rest == ' ') rest++;
    }
  }
  char remote_url[512] = {0};
  FILE *fp = popen("git remote get-url origin 2>/dev/null", "r");
  if (fp) {
    if (fgets(remote_url, sizeof remote_url, fp)) {
      size_t rlen = strlen(remote_url);
      while (rlen > 0 && (remote_url[rlen-1] == '\n' || remote_url[rlen-1] == '\r')) rlen--;
      remote_url[rlen] = 0;
      if (strncmp(remote_url, "ssh://git@", 10) == 0) {
        char *host = remote_url + 10;
        char *slash = strchr(host, '/');
        if (slash) {
          char tmp[512];
          snprintf(tmp, sizeof tmp, "https://%.*s%s", (int)(slash - host), host, slash);
          strncpy(remote_url, tmp, sizeof remote_url - 1);
          remote_url[sizeof remote_url - 1] = 0;
        }
      } else if (strncmp(remote_url, "git@", 4) == 0) {
        char *host = remote_url + 4;
        char *path = strchr(host, ':');
        if (path) {
          char tmp[512];
          snprintf(tmp, sizeof tmp, "https://%.*s/%s", (int)(path - host), host, path + 1);
          strncpy(remote_url, tmp, sizeof remote_url - 1);
          remote_url[sizeof remote_url - 1] = 0;
        }
      }
      size_t ulen = strlen(remote_url);
      if (ulen > 0 && remote_url[ulen-1] == '/') remote_url[--ulen] = 0;
      if (ulen > 4 && strcmp(remote_url + ulen - 4, ".git") == 0) { ulen -= 4; remote_url[ulen] = 0; }
    }
    pclose(fp);
  }
  FILE *f = fopen("CHANGELOG.md", "r");
  if (!f) { irc_reply(s, reply_target, src_nick, "changelog: CHANGELOG.md not found"); return 1; }
  char *line = NULL;
  size_t cap = 0;
  const char *headers[256];
  int total = 0;
  while (getline(&line, &cap, f) != -1) {
    size_t len = strlen(line);
    while (len > 0 && (line[len-1] == '\n' || line[len-1] == '\r')) line[--len] = 0;
    if (len > 10 && isdigit((unsigned char)line[0]) && isdigit((unsigned char)line[1]) &&
        isdigit((unsigned char)line[2]) && isdigit((unsigned char)line[3]) &&
        line[4] == '.' && isdigit((unsigned char)line[5]) && isdigit((unsigned char)line[6]) &&
        line[7] == '.' && isdigit((unsigned char)line[8]) && isdigit((unsigned char)line[9]) &&
        line[10] == ' ') {
      if (total < 256) headers[total++] = strdup(line);
    }
  }
  free(line);
  fclose(f);
  int showed = count < total ? count : total;
  struct timespec ts_msg = { .tv_sec = 0, .tv_nsec = 200000000 };
  for (int i = 0; i < showed; i++) {
    irc_reply(s, reply_target, src_nick, headers[i]);
    free((void *)headers[i]);
    if (i + 1 < showed) nanosleep(&ts_msg, NULL);
  }
  for (int i = showed; i < total; i++) free((void *)headers[i]);
  if (total == 0) { irc_reply(s, reply_target, src_nick, "changelog: no entries found"); return 1; }
  if (*remote_url) {
    char link[1024];
    snprintf(link, sizeof link, "Full changelog: %s/blob/master/CHANGELOG.md", remote_url);
    irc_reply(s, reply_target, src_nick, link);
  }
  log_stamp(); fprintf(stderr, CLR_YELLOW "CHANGELOG %s from %s (count=%d, showed=%d)" CLR_RESET "\n", reply_target, src_nick, count, showed);
  return 1;
}

#endif