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/* Copyright (C) 2020 C. McEnroe <june@causal.agency>
*
* 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 <https://www.gnu.org/licenses/>.
*
* Additional permission under GNU GPL version 3 section 7:
*
* If you modify this Program, or any covered work, by linking or
* combining it with LibreSSL (or a modified version of that library),
* containing parts covered by the terms of the OpenSSL License and the
* original SSLeay license, the licensors of this Program grant you
* additional permission to convey the resulting work. Corresponding
* Source for a non-source form of such a combination shall include the
* source code for the parts of LibreSSL used as well as that of the
* covered work.
*/
#include <assert.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <regex.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include "chat.h"
static const char *Pattern = {
"("
"cvs|"
"ftp|"
"git|"
"gopher|"
"http|"
"https|"
"irc|"
"ircs|"
"magnet|"
"sftp|"
"ssh|"
"svn|"
"telnet|"
"vnc"
")"
":([^[:space:]>\"()]|[(][^)]*[)])+"
};
static regex_t Regex;
static void compile(void) {
static bool compiled;
if (compiled) return;
compiled = true;
int error = regcomp(&Regex, Pattern, REG_EXTENDED);
if (!error) return;
char buf[256];
regerror(error, &Regex, buf, sizeof(buf));
errx(EX_SOFTWARE, "regcomp: %s: %s", buf, Pattern);
}
struct URL {
uint id;
char *nick;
char *url;
};
enum { Cap = 64 };
static struct {
struct URL urls[Cap];
size_t len;
} ring;
static_assert(!(Cap & (Cap - 1)), "Cap is power of two");
static void push(uint id, const char *nick, const char *str, size_t len) {
struct URL *url = &ring.urls[ring.len++ % Cap];
free(url->nick);
free(url->url);
url->id = id;
url->nick = NULL;
if (nick) {
url->nick = strdup(nick);
if (!url->nick) err(EX_OSERR, "strdup");
}
url->url = strndup(str, len);
if (!url->url) err(EX_OSERR, "strndup");
}
void urlScan(uint id, const char *nick, const char *mesg) {
if (!mesg) return;
compile();
regmatch_t match = {0};
for (const char *ptr = mesg; *ptr; ptr += match.rm_eo) {
if (regexec(&Regex, ptr, 1, &match, 0)) break;
push(id, nick, &ptr[match.rm_so], match.rm_eo - match.rm_so);
}
}
struct Util urlOpenUtil;
static const struct Util OpenUtils[] = {
{ 1, { "open" } },
{ 1, { "xdg-open" } },
};
static void urlOpen(const char *url) {
pid_t pid = fork();
if (pid < 0) err(EX_OSERR, "fork");
if (pid) return;
close(STDIN_FILENO);
dup2(utilPipe[1], STDOUT_FILENO);
dup2(utilPipe[1], STDERR_FILENO);
if (urlOpenUtil.argc) {
struct Util util = urlOpenUtil;
utilPush(&util, url);
execvp(util.argv[0], (char *const *)util.argv);
warn("%s", util.argv[0]);
_exit(EX_CONFIG);
}
for (size_t i = 0; i < ARRAY_LEN(OpenUtils); ++i) {
struct Util util = OpenUtils[i];
utilPush(&util, url);
execvp(util.argv[0], (char *const *)util.argv);
if (errno != ENOENT) {
warn("%s", util.argv[0]);
_exit(EX_CONFIG);
}
}
warnx("no open utility found");
_exit(EX_CONFIG);
}
struct Util urlCopyUtil;
static const struct Util CopyUtils[] = {
{ 1, { "pbcopy" } },
{ 1, { "wl-copy" } },
{ 3, { "xclip", "-selection", "clipboard" } },
{ 3, { "xsel", "-i", "-b" } },
};
static void urlCopy(const char *url) {
int rw[2];
int error = pipe(rw);
if (error) err(EX_OSERR, "pipe");
size_t len = strlen(url);
if (len > PIPE_BUF) len = PIPE_BUF;
ssize_t n = write(rw[1], url, len);
if (n < 0) err(EX_IOERR, "write");
error = close(rw[1]);
if (error) err(EX_IOERR, "close");
pid_t pid = fork();
if (pid < 0) err(EX_OSERR, "fork");
if (pid) {
close(rw[0]);
return;
}
dup2(rw[0], STDIN_FILENO);
dup2(utilPipe[1], STDOUT_FILENO);
dup2(utilPipe[1], STDERR_FILENO);
close(rw[0]);
if (urlCopyUtil.argc) {
execvp(urlCopyUtil.argv[0], (char *const *)urlCopyUtil.argv);
warn("%s", urlCopyUtil.argv[0]);
_exit(EX_CONFIG);
}
for (size_t i = 0; i < ARRAY_LEN(CopyUtils); ++i) {
execvp(CopyUtils[i].argv[0], (char *const *)CopyUtils[i].argv);
if (errno != ENOENT) {
warn("%s", CopyUtils[i].argv[0]);
_exit(EX_CONFIG);
}
}
warnx("no copy utility found");
_exit(EX_CONFIG);
}
void urlOpenCount(uint id, uint count) {
for (uint i = 1; i <= Cap; ++i) {
const struct URL *url = &ring.urls[(ring.len - i) % Cap];
if (!url->url) break;
if (url->id != id) continue;
urlOpen(url->url);
if (!--count) break;
}
}
void urlOpenMatch(uint id, const char *str) {
for (uint i = 1; i <= Cap; ++i) {
const struct URL *url = &ring.urls[(ring.len - i) % Cap];
if (!url->url) break;
if (url->id != id) continue;
if ((url->nick && !strcmp(url->nick, str)) || strstr(url->url, str)) {
urlOpen(url->url);
break;
}
}
}
void urlCopyMatch(uint id, const char *str) {
for (uint i = 1; i <= Cap; ++i) {
const struct URL *url = &ring.urls[(ring.len - i) % Cap];
if (!url->url) break;
if (url->id != id) continue;
if (
!str
|| (url->nick && !strcmp(url->nick, str))
|| strstr(url->url, str)
) {
urlCopy(url->url);
break;
}
}
}
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