Pidgin GTalk Invisibility



/*

* GTalk Invisible Plugin

* Copyright (C) 2009, Fahrzin Hemmati

*

* With code by siorarina, :

* - support for multiple jabber accounts

* - workaround for deprecated functions (Debian)

*

* And Khushman, :

* - support for the startup issue

* - just don't start pidgin on invisible mode just after the plugin is installed

*

* Largely based on Purple - XMPP debugging tool

* Copyright (C) 2002-2003, Sean Egan

*

* Lightly based on Hello World Plugin

* Copyright (C) 2004, Gary Kramlich ,

* 2007, John Bailey

*

* 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 2 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, write to the Free Software

* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

* 02111-1301, USA.

*

*/

#ifdef HAVE_CONFIG_H

# include

#endif

/* config.h may define PURPLE_PLUGINS; protect the definition here so that we

* don't get complaints about redefinition when it's not necessary. */

#ifndef PURPLE_PLUGINS

# define PURPLE_PLUGINS

#endif

#ifdef GLIB_H

# include

#endif

/* This will prevent compiler errors in some instances and is better explained in the

* how-to documents on the wiki */

#ifndef G_GNUC_NULL_TERMINATED

# if __GNUC__ >= 4

# define G_GNUC_NULL_TERMINATED __attribute__((__sentinel__))

# else

# define G_GNUC_NULL_TERMINATED

# endif

#endif

//#include

#include

#include

#include

#include

#include

#include

#include

int startup = 0;

static GList *

get_jabber_accounts()

{

GList *accounts = NULL;

GList *jabber_accounts = NULL;

PurpleAccount *cur = NULL;

for (accounts = purple_accounts_get_all_active(); accounts; accounts = accounts->next)

{

cur = accounts->data;

if (strcmp(cur->protocol_id, "prpl-jabber") == 0)

jabber_accounts = g_list_append(jabber_accounts, cur);

}

return jabber_accounts;

}

static void

add_status_invisible(PurpleAccount *account)

{

PurpleStatusType *inv_type = NULL;

PurpleStatusType *type = NULL;

PurpleStatus *inv_status = NULL;

PurplePresence *pres = NULL;

GList * types = NULL;

GList * statuses = NULL;

inv_type = purple_status_type_new_full(

PURPLE_STATUS_INVISIBLE, //primitive

NULL, //id

NULL, //name

FALSE, //saveable

TRUE, //user_settable

FALSE); //independent

types = purple_account_get_status_types(account);

// if status 'INVISIBLE' is already present there's no need to add it

for (; types; types = types->next)

{

type = types->data;

if (purple_status_type_get_primitive(type) == PURPLE_STATUS_INVISIBLE)

return;

}

types = purple_account_get_status_types(account);

types = g_list_append(types, inv_type);

account->status_types = types;

pres = purple_account_get_presence(account);

inv_status = purple_status_new(inv_type, pres);

statuses = purple_presence_get_statuses(pres);

statuses = g_list_append(statuses, inv_status);

}

// callback that effectively does the trick!

static void

plugin_invisible_cb(PurpleAccount *account, PurpleStatus *old, PurpleStatus *new, gpointer data)

{

PurplePluginProtocolInfo *jabber_info = NULL;

PurpleConnection *gc = NULL;

const char *text = NULL;

gc = purple_account_get_connection(account);

if(!gc) return;

jabber_info = PURPLE_PLUGIN_PROTOCOL_INFO(gc->prpl);

//run only for jabber accounts...

if (purple_status_type_get_primitive(purple_status_get_type(new)) == PURPLE_STATUS_INVISIBLE

&& strcmp(account->protocol_id, "prpl-jabber") == 0

&& jabber_info && jabber_info->send_raw != NULL) // otherwise we can't send the text anyway

{

gc = purple_account_get_connection(account);

text="5";

jabber_info->send_raw(gc, text, strlen(text));

text="5";

jabber_info->send_raw(gc, text, strlen(text));

text="";

jabber_info->send_raw(gc, text, strlen(text));

}



}

// makes those accounts who have the value set as invisible

static void

plugin_invisible_cb_startup(PurpleAccount *account, gpointer data)

{

if (strcmp(account->protocol_id, "prpl-jabber") == 0) {

if( TRUE == purple_account_get_bool( account, "prev_invisible", FALSE ) ) {

purple_account_set_status( account, purple_primitive_get_id_from_type( PURPLE_STATUS_INVISIBLE ), TRUE, NULL );

purple_account_set_bool( account, "prev_invisible", FALSE );

}

}

}

// writes whether while about to quit, whether the account is invisible

static void

plugin_invisible_write_invisibility()

{

PurpleAccount *account = NULL;

GList *accounts = NULL;

accounts = get_jabber_accounts();

if( accounts == NULL ) {

return;

}

for(; accounts; accounts = accounts -> next ) {

account = accounts -> data;

if( purple_status_type_get_primitive(purple_status_get_type( purple_account_get_active_status( account ))) == PURPLE_STATUS_INVISIBLE ) {

purple_account_set_bool( account, "prev_invisible", TRUE );

} else {

purple_account_set_bool( account, "prev_invisible", FALSE );

}

}

}

static gboolean

plugin_load (PurplePlugin *plugin)

{

PurpleAccount *account = NULL;

GList *accounts = NULL;

accounts = get_jabber_accounts();

if (accounts == NULL)

return FALSE;

// for every jabber account we have to add an new status 'invisible'

for (; accounts; accounts = accounts->next)

{

account = accounts->data;

add_status_invisible(account);

}

purple_signal_connect(purple_accounts_get_handle(),

"account-status-changed",

plugin,

PURPLE_CALLBACK(plugin_invisible_cb),

NULL);

purple_signal_connect(purple_accounts_get_handle(),

"account-signed-on",

plugin,

PURPLE_CALLBACK(plugin_invisible_cb_startup),

NULL);



purple_signal_connect(( void * )purple_get_core(),

"quitting",

plugin,

PURPLE_CALLBACK(plugin_invisible_write_invisibility),

NULL);

return TRUE;

}

/* For specific notes on the meanings of each of these members, consult the C Plugin Howto

* on the website. */

static PurplePluginInfo info = {

PURPLE_PLUGIN_MAGIC,

PURPLE_MAJOR_VERSION,

PURPLE_MINOR_VERSION,

PURPLE_PLUGIN_STANDARD,

NULL,

0,

NULL,

PURPLE_PRIORITY_DEFAULT,

"core-fahhem-gtalkinvisible",

"GTalk Invisible",

"0.923",

"GTalk Invisible Plugin",

"Allows your Google Talk account to go \"invisible\". This will likely never be ported into the main code, so get used to this! Federico Zanco added support for multiple acounts.",

"Fahrzin Hemmati ",

"http://fahhem.com/pidgin/",

plugin_load,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL,

NULL

};

static void

init_plugin (PurplePlugin * plugin)

{

plugin_load(plugin);

}

PURPLE_INIT_PLUGIN (gtalkinvisible, init_plugin, info)



Good Ideas

In this post, i'll list a few good ideas for projects that i'll get in my day to day tech work.

• Local mobile cloud for high computing requirements. Mobiles might never match upto the computing power of computers. For some applications, we can use multiple processors of many devices close by to them. New high bandwidth adhoc networks such as local device to device wifi makes this possible. 

Update: 16/7/2013

• Information Retrieval techniques have the concept of well, "concepts". These concepts contain the inner idea of the topics. You can say that it is the common link between two slightly different pieces of information. If we can name these concepts, (e.g. a post on Gandhi's assassination and Kennedy's assassination can have the common concept, assassination) we can further this information retrieval system to create a system which might be searchable by topics! We will not need manual tagging by users. Furthermore, imagine this system applied to filesystems! As a sample use case, you can have a folder filled with interesting news articles that you have found, and to find all articles about terrorism, you can simply find "notes about terrorism". Should be interesting, and very helpful!

Max Priority Queue

This includes a maximum priority queue implementation using a heap, and a map C++ STL. It gives atleast O(log(n)) time for every operation.

#include 
#include 
#include 
#include 

using namespace std;

struct node {
 int priority;
 int data;
};

bool operator < ( node n1, node n2 )
{
 if( n1.priority < n2.priority ) return true;
 return false;
}

int find( priority_queue< node > q, int data ) {
 node n;
 int i = 0;

 while( !q.empty() ) {
  i++;
  n = q.top();
  q.pop();
  if( n.data == data ) return i;
 }

 return -1;
}

void display( priority_queue< node > q )
{
 while( !q.empty() ) {
  cout << "Priority: " << q.top().priority << "\tData: " << q.top().data << "\n";
  q.pop();
 }
}

void empty( priority_queue< node > &q )
{
 while ( !q.empty() ) q.pop();
}

bool change_priority( priority_queue< node > &q, int index, int new_priority )
{
 priority_queue< node > new_q;
 node n;
 bool flag = true;

 while( !q.empty() ) {
  n = q.top();
  q.pop();
  if( n.priority == index ) {
   n.priority = new_priority;
   flag = true;
  }
  new_q.push( n );
 }
 q = new_q;

 return flag;
}

int main( int  argc, char **args )
{
 priority_queue< node > q;
 node ntemp;
 int n;

 freopen( args[1], "r", stdin );

 cin >> n;
 cout << "n: " << n << "\n";

 cout << "Input:\n";
 for( int i = 0; i < n; i++ ) {
  scanf( "%d %d", &ntemp.priority, &ntemp.data );
  cout << "Pri: " << ntemp.priority << "\tData: " << ntemp.data << "\n";
  q.push( ntemp );
 }

 cout << "Display:\n";
 display( q );

 cout << "Find 6324: " << find( q, 6324 ) << "\n";
 cout << "Find 3: " << find( q, 3 ) << "\n";

 cout << "Displayed if priority changed.\n";
 if( change_priority( q, 24, 332 ) ) {
  display( q );
 }

 return 0;
}