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
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <errno.h>
  15
  16 #ifndef __WIN32__
  17         #include <fcntl.h>
  18 #endif
  19
  20 /* Purple plugin */
  21 #define PURPLE_PLUGINS
  22 #include <libpurple/debug.h>
  23 #include <libpurple/version.h>
  24 #include <libpurple/conversation.h>
  25 #include <libpurple/plugin.h>
  26 #include <libpurple/signals.h>
  27 #include <libpurple/util.h>
  28
  29 char *message = NULL;
  30 char *hook_script = NULL;
  31 char response[ANSWERSCRIPTS_LINE_LENGTH+1];
  32 int i;
  33
  34 typedef struct {
  35   FILE *pipe;
  36   PurpleConversation *conv;
  37 } answerscripts_job;
  38
  39 int answerscripts_process_message_cb(answerscripts_job *job) {
  40         FILE *pipe = job->pipe;
  41         PurpleConversation *conv = job->conv;
  42
  43         if (pipe && !feof(pipe)) {
  44                 if(!fgets(response, ANSWERSCRIPTS_LINE_LENGTH, pipe)
  45                         && (errno == EWOULDBLOCK || errno == EAGAIN)
  46                 ) return 1;
  47
  48                 for(i=0;response[i];i++) if(response[i]=='\n') response[i]=0;
  49                 purple_conv_im_send(purple_conversation_get_im_data(conv), response);
  50
  51                 if(!feof(pipe)) return 1;
  52         }
  53         pclose(pipe);
  54         free(job);
  55         return 0;
  56 }
  57
  58 static void received_im_msg_cb(PurpleAccount *account, char *who, char *buffer, PurpleConversation *conv, PurpleMessageFlags flags, void *data) {
  59         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: */
  60
  61         //Get message
  62         message = purple_markup_strip_html(buffer);
  63         //printf("\nHarvie received: %s: %s\n", who, message); //debug
  64         //purple_conv_im_send(purple_conversation_get_im_data(conv), ":-*"); //debug
  65
  66         //Get status
  67         PurpleStatus *status = purple_account_get_active_status(account);
  68         PurpleStatusType *type = purple_status_get_type(status);
  69
  70         //Get status id
  71         const char *status_id = NULL;
  72         status_id = purple_primitive_get_id_from_type(purple_status_type_get_primitive(type));
  73
  74         //Get status message
  75         const char *status_msg = NULL;
  76         if (purple_status_type_get_attr(type, "message") != NULL) {
  77                 status_msg = purple_status_get_attr_string(status, "message");
  78         } else {
  79                 status_msg = (char *) purple_savedstatus_get_message(purple_savedstatus_get_current());
  80         }
  81
  82         //Export variables to environment
  83         setenv(ENV_PREFIX "FROM", who, 1);
  84         setenv(ENV_PREFIX "MSG", message, 1);
  85         setenv(ENV_PREFIX "STATUS", status_id, 1);
  86         setenv(ENV_PREFIX "STATUS_MSG", status_msg, 1);
  87
  88         //Launch job on background
  89         answerscripts_job *job = (answerscripts_job*) malloc(sizeof(answerscripts_job));
  90         job->pipe = popen(hook_script, "r");
  91         job->conv = conv;
  92
  93         #ifndef __WIN32__
  94                 int fflags = fcntl(fileno(job->pipe), F_GETFL, 0);
  95                 fcntl(fileno(job->pipe), F_SETFL, fflags | O_NONBLOCK);
  96         #endif
  97
  98         purple_timeout_add(ANSWERSCRIPTS_TIMEOUT_INTERVAL, (GSourceFunc) answerscripts_process_message_cb, (gpointer) job);
  99 }
 100
 101 static gboolean plugin_load(PurplePlugin * plugin) {
 102         asprintf(&hook_script,"%s/%s",purple_user_dir(),ANSWERSCRIPT);
 103         void *conv_handle = purple_conversations_get_handle();
 104         purple_signal_connect(conv_handle, "received-im-msg", plugin, PURPLE_CALLBACK(received_im_msg_cb), NULL);
 105         return TRUE;
 106 }
 107
 108 static gboolean plugin_unload(PurplePlugin * plugin) {
 109         free(hook_script);
 110         return TRUE;
 111 }
 112
 113 static PurplePluginInfo info = {
 114         PURPLE_PLUGIN_MAGIC,
 115         PURPLE_MAJOR_VERSION,
 116         PURPLE_MINOR_VERSION,
 117         PURPLE_PLUGIN_STANDARD,
 118         NULL,
 119         0,
 120         NULL,
 121         PURPLE_PRIORITY_DEFAULT,
 122
 123         "core-answerscripts",
 124         "AnswerScripts",
 125         "0.3.0",
 126         "Framework for hooking scripts to process received messages for libpurple clients",
 127         "This plugin will execute script ~/.purple/" ANSWERSCRIPT " "
 128                 "or any other executable called  " ANSWERSCRIPT " and found in purple_user_dir() "
 129                 "for each single instant message received.\n"
 130                 "\n- Envinronment values PURPLE_MSG and PURPLE_FROM will be set to carry "
 131                 "informations about message text and sender so script can respond to that message."
 132                 "\n- Any text printed to STDOUT by the script will be sent back as answer to message."
 133                 "\n\nPlease see example scripts, documentation or source code for more informations...",
 134         "Harvie <harvie@email.cz>",
 135         "http://github.com/harvie/libpurple-core-answerscripts",
 136
 137         plugin_load,
 138         plugin_unload,
 139         NULL,
 140         NULL,
 141         NULL,
 142         NULL,
 143         NULL,
 144         NULL,
 145         NULL,
 146         NULL,
 147         NULL
 148 };
 149
 150 static void init_plugin(PurplePlugin * plugin) {
 151
 152 }
 153
 154 PURPLE_INIT_PLUGIN(autoanswer, init_plugin, info)