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#include <stdio.h>
#include <string.h>
#include <dlfcn.h>
#include "event.h"
#include "global.h"
#include "plugin.h"
#include "plugin_client_header.h"
struct plugin_data{
void *handle;
plugin_event_func_t *callback;
};
static i64 num_plugins=0;
static i64 plugins_cap=8;
static struct plugin_data *plugins_list=NULL;
static void consume_event(const struct event_item *event){
struct plugin_event pe;
switch(event->type){
case EVENT_MESSAGE: pe.type=PLUGIN_EVENT_MESSAGE; break;
case EVENT_ONLINE: pe.type=PLUGIN_EVENT_ONLINE; break;
case EVENT_JOIN: pe.type=PLUGIN_EVENT_JOIN; break;
case EVENT_LEAVE: pe.type=PLUGIN_EVENT_LEAVE; break;
default:
die("Unknown event type %d in plugin.c:consume_event",event->type);
}
pe.timestamp=event->timestamp;
pe.message=event->message;
pe.user=event->user;
pe.room=event->room;
pe.num=event->num;
for(i64 i=0;i<num_plugins;i++){
plugins_list[i].callback(&pe);
}
}
void plugin_init(void){
if(plugins_list!=NULL)return;
plugins_list=malloc(plugins_cap,struct plugin_data);
memset(plugins_list,0,num_plugins*sizeof(struct plugin_data));
event_register(consume_event);
}
void plugin_register(const char *fname){
if(num_plugins==plugins_cap){
plugins_cap*=2;
plugins_list=realloc(plugins_list,plugins_cap,struct plugin_data);
}
struct plugin_data *data=plugins_list+num_plugins;
num_plugins++;
data->handle=dlopen(fname,RTLD_NOW|RTLD_LOCAL);
if(data->handle==NULL){
die("Error loading plugin '%s': %s",fname,dlerror());
}
plugin_event_func_t* (*init_func)(void)=NULL;
dlerror();
*(void**)&init_func=dlsym(data->handle,"plugin_init_func");
char *err=dlerror();
if(err!=NULL){
die("Error reading symbol 'plugin_init_func' from plugin '%s'",fname);
}
if(init_func==NULL){
die("Plugin '%s' exports NULL init function",fname);
}
data->callback=init_func();
if(data->callback==NULL){
die("Init function of plugin '%s' returned NULL",fname);
}
printf("Loaded plugin '%s'\n",fname);
}
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