answerscripts.c

   1 //#define __WIN32__
   2 #ifndef __WIN32__
   3         #define ANSWERSCRIPT_EXT ""
   4 #else
   5         #define ANSWERSCRIPT_EXT ".exe"
   6 #endif
   7 #define ANSWERSCRIPT "answerscripts" ANSWERSCRIPT_EXT
   8 #define ANSWERSCRIPTS_TIMEOUT_INTERVAL 250
   9 #define ANSWERSCRIPTS_LINE_LENGTH 4096
  10 #define ENV_PREFIX "ANSW_"
  11 #define PROTOCOL_PREFIX "prpl-"
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <errno.h>
  16 #include <string.h>
  17
  18 #ifndef __WIN32__
  19         #include <fcntl.h>
  20 #else
  21         #include <windows.h>
  22 #endif
  23
  24 /* Purple plugin */
  25 #define PURPLE_PLUGINS
  26 #include <libpurple/debug.h>
  27 #include <libpurple/version.h>
  28 #include <libpurple/conversation.h>
  29 #include <libpurple/plugin.h>
  30 #include <libpurple/signals.h>
  31 #include <libpurple/util.h>
  32
  33 char *message = NULL;
  34 char *hook_script = NULL;
  35
  36 typedef struct {
  37   FILE *pipe;
  38   PurpleConversation *conv;
  39 } answerscripts_job;
  40
  41 int answerscripts_process_message_cb(answerscripts_job *job) {
  42         int i;
  43         char response[ANSWERSCRIPTS_LINE_LENGTH+1];
  44         FILE *pipe = job->pipe;
  45         PurpleConversation *conv = job->conv;
  46
  47         if (pipe && !feof(pipe)) {
  48                 if(!fgets(response, ANSWERSCRIPTS_LINE_LENGTH, pipe)
  49                         && (errno == EWOULDBLOCK || errno == EAGAIN) //WARNING! Not compatible with windows :-(
  50                 ) return 1;
  51
  52                 for(i=0;response[i];i++) if(response[i]=='\n') response[i]=0;
  53                 purple_conv_im_send(purple_conversation_get_im_data(conv), response);
  54
  55                 if(!feof(pipe)) return 1;
  56         }
  57         pclose(pipe);
  58         free(job);
  59         return 0;
  60 }
  61
  62 static void received_im_msg_cb(PurpleAccount *account, char *who, char *buffer, PurpleConversation *conv, PurpleMessageFlags flags, void *data) {
  63         if (conv == NULL) conv = purple_conversation_new(PURPLE_CONV_TYPE_IM, account, who); //* A workaround to avoid skipping of the first message as a result on NULL-conv: */
  64         PurpleBuddy *buddy = purple_find_buddy(account, who);
  65
  66         //Get message
  67         message = purple_markup_strip_html(buffer);
  68         //printf("\nHarvie received: %s: %s\n", who, message); //debug
  69         //purple_conv_im_send(purple_conversation_get_im_data(conv), ":-*"); //debug
  70
  71         /* Here are prototypes of some functions interesting to implement github feature request #3
  72
  73         LOCAL USER:
  74         const char* purple_account_get_alias    (       const PurpleAccount *            account         )
  75         const gchar* purple_account_get_name_for_display        (       const PurpleAccount *            account         )
  76         REMOTE USER (Buddy):
  77         const char *    purple_contact_get_alias (PurpleContact *contact)
  78         const char *    purple_buddy_get_name (const PurpleBuddy *buddy)
  79         const char *    purple_buddy_get_alias_only (PurpleBuddy *buddy)
  80         const char *    purple_buddy_get_server_alias (PurpleBuddy *buddy)
  81         const char *    purple_buddy_get_contact_alias (PurpleBuddy *buddy)
  82         const char *    purple_buddy_get_local_alias (PurpleBuddy *buddy)
  83         const char *    purple_buddy_get_alias (PurpleBuddy *buddy)
  84         PurpleGroup *   purple_buddy_get_group (PurpleBuddy *buddy)
  85         const char *    purple_group_get_name (PurpleGroup *group)
  86         */
  87
  88         //Get buddy group
  89         const char *from_group = purple_group_get_name(purple_buddy_get_group(buddy));
  90
  91         //Get protocol ID
  92         const char *protocol_id = purple_account_get_protocol_id(account);
  93         if(!strncmp(protocol_id,PROTOCOL_PREFIX,strlen(PROTOCOL_PREFIX))) protocol_id += strlen(PROTOCOL_PREFIX); //trim out protocol prefix (eg.: "prpl-irc" => "irc")
  94
  95         //Get status
  96         PurpleStatus *status = purple_account_get_active_status(account);
  97         PurpleStatusType *type = purple_status_get_type(status);
  98
  99         //Get status id
 100         const char *status_id = NULL;
 101         status_id = purple_primitive_get_id_from_type(purple_status_type_get_primitive(type));
 102
 103         //Get status message
 104         const char *status_msg = NULL;
 105         if (purple_status_type_get_attr(type, "message") != NULL) {
 106                 status_msg = purple_status_get_attr_string(status, "message");
 107         } else {
 108                 status_msg = (char *) purple_savedstatus_get_message(purple_savedstatus_get_current());
 109         }
 110
 111         //Export variables to environment
 112         setenv(ENV_PREFIX "MSG", message, 1);
 113         setenv(ENV_PREFIX "FROM", who, 1);
 114         setenv(ENV_PREFIX "FROM_GROUP", from_group, 1);
 115         setenv(ENV_PREFIX "PROTOCOL", protocol_id, 1);
 116         setenv(ENV_PREFIX "STATUS", status_id, 1);
 117         setenv(ENV_PREFIX "STATUS_MSG", status_msg, 1);
 118
 119         //Launch job on background
 120         answerscripts_job *job = (answerscripts_job*) malloc(sizeof(answerscripts_job));
 121         job->pipe = popen(hook_script, "r");
 122         job->conv = conv;
 123
 124         #ifndef __WIN32__
 125                 int fflags = fcntl(fileno(job->pipe), F_GETFL, 0);
 126                 fcntl(fileno(job->pipe), F_SETFL, fflags | O_NONBLOCK);
 127         #else
 128                 //WARNING! Somehow implement FILE_FLAG_OVERLAPPED & FILE_FLAG_NO_BUFFERING support on windows
 129         #endif
 130
 131         purple_timeout_add(ANSWERSCRIPTS_TIMEOUT_INTERVAL, (GSourceFunc) answerscripts_process_message_cb, (gpointer) job);
 132 }
 133
 134 static gboolean plugin_load(PurplePlugin * plugin) {
 135         asprintf(&hook_script,"%s/%s",purple_user_dir(),ANSWERSCRIPT);
 136         void *conv_handle = purple_conversations_get_handle();
 137         purple_signal_connect(conv_handle, "received-im-msg", plugin, PURPLE_CALLBACK(received_im_msg_cb), NULL);
 138         return TRUE;
 139 }
 140
 141 static gboolean plugin_unload(PurplePlugin * plugin) {
 142         free(hook_script);
 143         return TRUE;
 144 }
 145
 146 static PurplePluginInfo info = {
 147         PURPLE_PLUGIN_MAGIC,
 148         PURPLE_MAJOR_VERSION,
 149         PURPLE_MINOR_VERSION,
 150         PURPLE_PLUGIN_STANDARD,
 151         NULL,
 152         0,
 153         NULL,
 154         PURPLE_PRIORITY_DEFAULT,
 155
 156         "core-answerscripts",
 157         "AnswerScripts",
 158         "0.3.1",
 159         "Framework for hooking scripts to process received messages for libpurple clients",
 160         "\nThis plugin will execute script \"~/.purple/" ANSWERSCRIPT "\" "
 161                 "(or any other executable called \"" ANSWERSCRIPT "\" and found in purple_user_dir()) "
 162                 "each time when instant message is received.\n"
 163                 "\n- Any text printed to STDOUT by this script will be sent back as answer to received message."
 164                 "\n- Following environment values will be set, so script can use them for responding:\n"
 165                 "\t- ANSW_MSG\n"
 166                 "\t- ANSW_FROM\n"
 167                 "\t- ANSW_PROTOCOL\n"
 168                 "\t- ANSW_STATUS\n"
 169                 "\t- ANSW_STATUS_MSG\n"
 170                 "\nPlease see sample scripts, documentation, website and source code for more informations...\n"
 171                 "\n(-; Peace ;-)\n",
 172         "Tomas Mudrunka <harvie@email.cz>",
 173         "http://github.com/harvie/libpurple-core-answerscripts",
 174
 175         plugin_load,
 176         plugin_unload,
 177         NULL,
 178         NULL,
 179         NULL,
 180         NULL,
 181         NULL,
 182         NULL,
 183         NULL,
 184         NULL,
 185         NULL
 186 };
 187
 188 static void init_plugin(PurplePlugin * plugin) {
 189
 190 }
 191
 192 PURPLE_INIT_PLUGIN(autoanswer, init_plugin, info)