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#include <string.h>
#include <glib.h>
#include <stdlib.h>
#include <stdio.h>
#include "linktemplates.h"
#include "link.h"
#define STREAM_LIBQUVI_SELECTOR "stream:libquvi"
#define STREAM_LIBQUVI_SELECTOR_LEN strlen(STREAM_LIBQUVI_SELECTOR)
#define STREAM_SELECTOR "stream:"
#define STREAM_SELECTOR_LEN strlen(STREAM_SELECTOR)
#define EXT_CMD_SELECTOR "bin:"
#define EXT_CMD_SELECTOR_LEN strlen(EXT_CMD_SELECTOR)
struct LinkTemplates {
GPtrArray *matcher;
};
struct LinkMatcher {
GRegex *pattern;
LinkAction *action;
};
static void free_link_matcher(gpointer link);
static struct LinkMatcher *parse_line(const char *line);
static LinkAction *parse_action(const gchar *actionstr);
LinkTemplates *link_templates_create() {
LinkTemplates *config = malloc(sizeof(LinkTemplates));
if (!config)
return NULL;
memset(config, 0, sizeof(LinkTemplates));
config->matcher = g_ptr_array_new_with_free_func(free_link_matcher);
return config;
}
void link_templates_delete(LinkTemplates *conf) {
g_ptr_array_free(conf->matcher, TRUE);
free(conf);
}
void link_templates_load(LinkTemplates *conf, const char *filename) {
g_log(LIBWEBVI_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Loading matchers from %s", filename);
FILE *file = fopen(filename, "r");
if (!file) {
g_log(LIBWEBVI_LOG_DOMAIN, G_LOG_LEVEL_WARNING,
"Failed to read file %s", filename);
return;
}
char line[1024];
while (fgets(line, sizeof line, file)) {
struct LinkMatcher *link = parse_line(line);
if (link) {
g_ptr_array_add(conf->matcher, link);
}
}
fclose(file);
}
struct LinkMatcher *parse_line(const char *line) {
if (!line)
return NULL;
const char *p = line;
while (*p == ' ')
p++;
if (*p == '\0' || *p == '#' || *p == '\n' || *p == '\r')
return NULL;
const char *end = line + strlen(line);
while ((end-1 >= p) &&
(end[-1] == ' ' || end[-1] == '\r' || end[-1] == '\n' || end[-1] == '\t'))
end--;
if (end <= p)
return NULL;
const char *tab = memchr(p, '\t', end-p);
gchar *pattern;
LinkAction *action;
if (tab && tab < end) {
pattern = g_strndup(p, tab-p);
const char *cmdstart = tab+1;
gchar *action_field = g_strndup(cmdstart, end-cmdstart);
action = parse_action(action_field);
g_free(action_field);
} else {
pattern = g_strndup(p, end-p);
action = link_action_create(LINK_ACTION_PARSE, NULL);
}
if (!action) {
g_free(pattern);
return NULL;
}
g_log(LIBWEBVI_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
"Compiling pattern %s %s %s", pattern,
link_action_type_to_string(link_action_get_type(action)),
link_action_get_command(action));
struct LinkMatcher *matcher = malloc(sizeof(struct LinkMatcher));
GError *err = NULL;
matcher->pattern = g_regex_new(pattern, G_REGEX_OPTIMIZE, 0, &err);
matcher->action = action;
if (err) {
g_log(LIBWEBVI_LOG_DOMAIN, G_LOG_LEVEL_WARNING,
"Error compiling pattern %s: %s", pattern, err->message);
g_error_free(err);
free_link_matcher(matcher);
matcher = NULL;
}
g_free(pattern);
return matcher;
}
LinkAction *parse_action(const gchar *actionstr) {
if (!actionstr)
return NULL;
if (*actionstr == '\0') {
return link_action_create(LINK_ACTION_PARSE, NULL);
} else if (strcmp(actionstr, STREAM_LIBQUVI_SELECTOR) == 0) {
return link_action_create(LINK_ACTION_STREAM_LIBQUVI, NULL);
} else if (strncmp(actionstr, EXT_CMD_SELECTOR, EXT_CMD_SELECTOR_LEN) == 0) {
const gchar *command = actionstr + EXT_CMD_SELECTOR_LEN;
return link_action_create(LINK_ACTION_EXTERNAL_COMMAND, command);
} else if (strncmp(actionstr, STREAM_SELECTOR, STREAM_SELECTOR_LEN) == 0) {
g_log(LIBWEBVI_LOG_DOMAIN, G_LOG_LEVEL_WARNING,
"Unknown streamer %s in link template file", actionstr);
return NULL;
} else {
g_log(LIBWEBVI_LOG_DOMAIN, G_LOG_LEVEL_WARNING,
"Invalid action %s in link template file", actionstr);
return NULL;
}
}
const LinkAction *link_templates_get_action(const LinkTemplates *conf,
const char *url)
{
for (int i=0; i<link_templates_size(conf); i++) {
struct LinkMatcher *matcher = g_ptr_array_index(conf->matcher, i);
if (g_regex_match(matcher->pattern, url, 0, NULL))
{
return matcher->action;
}
}
return NULL;
}
int link_templates_size(const LinkTemplates *conf) {
return (int)conf->matcher->len;
}
void free_link_matcher(gpointer ptr) {
if (ptr) {
struct LinkMatcher *matcher = (struct LinkMatcher *)ptr;
if (matcher->pattern)
g_regex_unref(matcher->pattern);
if (matcher->action)
link_action_delete(matcher->action);
free(matcher);
}
}
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