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push.cpp
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push.cpp
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/**
* ZNC Push Module
*
* Allows the user to enter a Push user and API token, and sends
* channel highlights and personal messages to Push.
*
* Copyright (c) 2011 John Reese
* Licensed under the MIT license
*/
#define REQUIRESSL
#define PUSHVERSION "dev"
#include <znc/znc.h>
#include <znc/Chan.h>
#include <znc/User.h>
#include <znc/IRCNetwork.h>
#include <znc/Modules.h>
#include <znc/FileUtils.h>
#include <znc/Client.h>
#include "time.h"
#include <string.h>
#ifdef USE_CURL
#include <curl/curl.h>
#endif // USE_CURL
// Forward declaration
class CPushMod;
/**
* Shorthand for encoding a string for a URL.
*
* @param str String to be encoded
* @return Encoded string
*/
CString urlencode(const CString& str)
{
return str.Escape_n(CString::EASCII, CString::EURL);
}
#ifndef USE_CURL
/**
* Socket class for generating HTTP requests.
*/
class CPushSocket : public CSocket
{
public:
CPushSocket(CModule *p) : CSocket(p)
{
EnableReadLine();
parent = (CPushMod*) p;
first = true;
crlf = "\r\n";
user_agent = "ZNC Push/" + CString(PUSHVERSION);
}
// Implemented after CPushMod
void Request(bool post, const CString& host, const CString& url, MCString& parameters, const CString& auth="");
virtual void ReadLine(const CString& data);
virtual void Disconnected();
private:
CPushMod *parent;
bool first;
// Too lazy to add CString("\r\n\") everywhere
CString crlf;
// User agent to use
CString user_agent;
};
#else
// forward declaration
CURLcode make_curl_request(const CString& service_host, const CString& service_url,
const CString& service_auth, MCString& params, int port,
bool use_ssl, bool use_post, bool debug);
#endif // USE_CURL
/**
* Push notification module.
*/
class CPushMod : public CModule
{
protected:
// Application name
CString app;
// Time last notification was sent for a given context
std::map <CString, time_t> last_notification_time;
// Time of last message by user to a given context
std::map <CString, time_t> last_reply_time;
// Time of last activity by user for a given context
std::map <CString, time_t> last_active_time;
// Time of last activity by user in any context
time_t idle_time;
// User object
CUser *user;
// Configuration options
MCString options;
MCString defaults;
public:
MODCONSTRUCTOR(CPushMod) {
#ifdef USE_CURL
curl_global_init(CURL_GLOBAL_DEFAULT);
#endif
app = "ZNC";
idle_time = time(NULL);
// Current user
user = GetUser();
// Push service information
defaults["service"] = "";
defaults["username"] = "";
defaults["secret"] = "";
defaults["target"] = "";
// Notification settings
defaults["message_content"] = "{message}";
defaults["message_length"] = "100";
defaults["message_title"] = "{title}";
defaults["message_uri"] = "";
defaults["message_uri_post"] = "no";
defaults["message_uri_title"] = "";
defaults["message_priority"] = "0";
defaults["message_sound"] = "";
// Notification conditions
defaults["away_only"] = "no";
defaults["client_count_less_than"] = "0";
defaults["highlight"] = "";
defaults["idle"] = "0";
defaults["last_active"] = "180";
defaults["last_notification"] = "300";
defaults["nick_blacklist"] = "";
defaults["replied"] = "yes";
// Proxy, for libcurl
defaults["proxy"] = "";
defaults["proxy_ssl_verify"] = "yes";
// Advanced
defaults["channel_conditions"] = "all";
defaults["query_conditions"] = "all";
defaults["debug"] = "off";
}
virtual ~CPushMod() {
#ifdef USE_CURL
curl_global_cleanup();
#endif
}
public:
/**
* Debugging messages. Prints to *push when the debug option is enabled.
*
* @param data Debug message
*/
void PutDebug(const CString& data)
{
if (options["debug"] == "on")
{
PutModule(data);
}
}
protected:
/**
* Performs string expansion on a set of keywords.
* Given an initial string and a dictionary of string replacments,
* iterate over the dictionary, expanding keywords one-by-one.
*
* @param content String contents
* @param replace Dictionary of string replacements
* @return Result of string replacements
*/
CString expand(const CString& content, MCString& replace)
{
CString result = content.c_str();
for(MCString::iterator i = replace.begin(); i != replace.end(); i++)
{
result.Replace(i->first, i->second);
}
return result;
}
/**
* Verifies whether a given string contains only numbers.
*
* @param content String to verify
*/
bool is_number(const CString& content)
{
CString::const_iterator it = content.begin();
while(it != content.end() && std::isdigit(*it)) ++it;
return !content.empty() && it == content.end();
}
/**
* Send a message to the currently-configured push service.
* Requires (and assumes) that the user has already configured their
* username and API secret using the 'set' command.
*
* @param message Message to be sent to the user
* @param title Message title to use
* @param context Channel or nick context
*/
void send_message(const CString& message, const CString& title="New Message", const CString& context="*push", const CNick& nick=CString("*push"))
{
// Set the last notification time
last_notification_time[context] = time(NULL);
// Shorten message if needed
unsigned int message_length = options["message_length"].ToUInt();
CString short_message = message;
if (message_length > 0)
{
short_message = message.Ellipsize(message_length);
}
// Generate an ISO8601 date string
time_t rawtime;
struct tm * timeinfo;
time(&rawtime);
timeinfo = localtime(&rawtime);
char iso8601 [20];
strftime(iso8601, 20, "%Y-%m-%d %H:%M:%S", timeinfo);
// Message string replacements
MCString replace;
replace["{context}"] = context;
replace["{nick}"] = nick.GetNick();
replace["{datetime}"] = CString(iso8601);
replace["{unixtime}"] = CString(time(NULL));
replace["{message}"] = short_message;
replace["{title}"] = title;
replace["{username}"] = options["username"];
replace["{secret}"] = options["secret"];
replace["{network}"] = GetNetwork()->GetName();
CString message_uri = expand(options["message_uri"], replace);
CString message_title = expand(options["message_title"], replace);
CString message_content = expand(options["message_content"], replace);
// Set up the connection profile
CString service = options["service"];
bool use_post = true;
int use_port = 443;
bool use_ssl = true;
CString service_host;
CString service_url;
CString service_auth;
MCString params;
// Service-specific profiles
if (service == "pushbullet")
{
if (options["secret"] == "")
{
PutModule("Error: secret (api key) not set");
return;
}
service_host = "api.pushbullet.com";
service_url = "/v2/pushes";
// BASIC auth, base64-encoded APIKey:
service_auth = options["secret"] + CString(":");
if (options["target"] != "")
{
params["device_iden"] = options["target"];
}
if (message_uri == "")
{
params["type"] = "note";
} else {
params["type"] = "link";
params["url"] = message_uri;
}
params["title"] = message_title;
params["body"] = message_content;
}
else if (service == "boxcar")
{
if (options["username"] == "")
{
PutModule("Error: username not set");
return;
}
CString boxcar_api_key = "puSd2qp2gCDZO7nWkvb9";
CString boxcar_api_secret = "wLQQKSyGybIOkggbiKipefeYGLni9B3FPZabopHp";
service_host = "boxcar.io";
service_url = "/devices/providers/" + boxcar_api_key + "/notifications";
params["email"] = options["username"];
params["notification[from_screen_name]"] = context;
params["notification[message]"] = message_content;
params["notification[source_url]"] = message_uri;
}
else if (service == "boxcar2")
{
if (options["secret"] == "")
{
PutModule("Error: secret not set to apikey");
return;
}
service_host = "new.boxcar.io";
service_url = "/api/notifications";
params["user_credentials"] = options["secret"];
params["notification[title]"] = message_title;
params["notification[long_message]"] = message_content;
if ( options["message_sound"] != "" )
{
params["notification[sound]"] = options["message_sound"];
}
}
else if (service == "nma")
{
if (options["secret"] == "")
{
PutModule("Error: secret not set");
return;
}
if (options["message_priority"] != "")
{
params["priority"] = options["message_priority"];
}
service_host = "www.notifymyandroid.com";
service_url = "/publicapi/notify";
params["apikey"] = options["secret"];
params["application"] = app;
params["event"] = message_title;
params["description"] = message_content;
params["url"] = message_uri;
}
else if (service == "pushover")
{
if (options["username"] == "")
{
PutModule("Error: username (user key) not set");
return;
}
if (options["secret"] == "")
{
PutModule("Error: secret (application token/key) not set");
return;
}
service_host = "api.pushover.net";
service_url = "/1/messages.json";
params["token"] = options["secret"];
params["user"] = options["username"];
params["title"] = message_title;
params["message"] = message_content;
if (message_uri != "")
{
params["url"] = message_uri;
}
if ( options["message_uri_title"] != "" )
{
params["url_title"] = options["message_uri_title"];
}
if (options["target"] != "")
{
params["device"] = options["target"];
}
if ( options["message_sound"] != "" )
{
params["sound"] = options["message_sound"];
}
if (options["message_priority"] != "")
{
params["priority"] = options["message_priority"];
}
}
else if (service == "prowl")
{
if (options["secret"] == "")
{
PutModule("Error: secret not set");
return;
}
service_host = "api.prowlapp.com";
service_url = "/publicapi/add";
params["apikey"] = options["secret"];
params["application"] = app;
params["event"] = message_title;
params["description"] = message_content;
params["url"] = message_uri;
}
else if (service == "supertoasty")
{
if (options["secret"] == "")
{
PutModule("Error: secret (device id) not set");
return;
}
use_post = false;
use_port = 80;
use_ssl = false;
service_host = "api.supertoasty.com";
service_url = "/notify/"+options["secret"];
params["title"] = message_title;
params["text"] = message_content;
params["image"] = "https://raw2.github.com/jreese/znc-push/master/logo.png";
params["sender"] = "ZNC Push";
}
else if (service == "faast")
{
if (options["secret"] == "")
{
PutModule("Error: secret not set to apikey");
return;
}
service_host = "www.appnotifications.com";
service_url = "/account/notifications.json";
params["user_credentials"] = options["secret"];
params["notification[title]"] = message_title;
params["notification[subtitle]"] = context;
params["notification[message]"] = message_content;
params["notification[long_message]"] = message_content;
params["notification[icon_url]"] = "https://raw2.github.com/jreese/znc-push/master/logo.png";
if ( options["message_sound"] != "" )
{
params["notification[sound]"] = options["message_sound"];
}
if ( options["message_uri"] != "" )
{
params["notification[run_command]"] = options["message_uri"];
}
}
else if (service == "url")
{
if (options["message_uri"] == "")
{
PutModule("Error: message_uri not set");
return;
}
CString::size_type count;
VCString parts;
CString url = options["message_uri"];
// Verify that the URL begins with either http:// or https://
count = url.Split("://", parts, false);
if (count != 2)
{
PutModule("Error: invalid url format");
return;
}
if(options["message_uri_post"] != "yes")
{
use_post = false;
}
if (parts[0] == "https")
{
use_ssl = true;
use_port = 443;
}
else if (parts[0] == "http")
{
use_ssl = false;
use_port = 80;
}
else
{
PutModule("Error: invalid url schema");
return;
}
// HTTP basic auth
if(options["username"] != "" || options["secret"] != "")
{
service_auth = options["username"] + CString(":") + options["secret"];
}
// Process the remaining portion of the URL
url = parts[1];
// Split out the host and optional port number; this breaks with raw IPv6 addresses
CString host = url.Token(0, false, "/");
count = host.Split(":", parts, false);
if (count > 1)
{
use_port = parts[1].ToInt();
}
service_host = parts[0];
// Split remaining URL into path and query components
url = "/" + url.Token(1, true, "/");
service_url = expand(url.Token(0, false, "?"), replace);
// Parse and expand query parameter values
url = url.Token(1, true, "?");
url.URLSplit(params);
for (MCString::iterator i = params.begin(); i != params.end(); i++) {
i->second = expand(i->second, replace);
}
}
else if (service == "airgram")
{
if (options["target"] == "")
{
PutModule("Error: target (email) not set");
return;
}
service_host = "api.airgramapp.com";
if (options["username"] != "" && options["secret"] != "")
{
service_url = "/1/send";
service_auth = options["username"] + CString(":") + options["secret"];
}
else
{
service_url = "/1/send_as_guest";
}
params["email"] = options["target"];
params["msg"] = message_content;
}
else
{
PutModule("Error: service type not selected");
return;
}
PutDebug("service: " + service);
PutDebug("service_host: " + service_host);
PutDebug("service_url: " + service_url);
PutDebug("service_auth: " + service_auth);
PutDebug("use_port: " + CString(use_port));
PutDebug("use_ssl: " + CString(use_ssl ? 1 : 0));
PutDebug("use_post: " + CString(use_post ? 1 : 0));
#ifdef USE_CURL
PutDebug("using libcurl");
params["proxy"] = options["proxy"];
params["proxy_ssl_verify"] = options["proxy_ssl_verify"];
make_curl_request(service_host, service_url, service_auth, params, use_port, use_ssl, use_post, options["debug"] == "on");
#else
PutDebug("NOT using libcurl");
// Create the socket connection, write to it, and add it to the queue
CPushSocket *sock = new CPushSocket(this);
sock->Connect(service_host, use_port, use_ssl);
sock->Request(use_post, service_host, service_url, params, service_auth);
AddSocket(sock);
#endif
}
/**
* Evaluate a boolean expression using condition values.
* All tokens must be separated by spaces, using "and" and "or" for
* boolean operators, "(" and ")" to enclose sub-expressions, and
* condition option names to evaluate each condition.
*
* @param expression Boolean expression string
* @param context Notification context
* @param nick Sender nick
* @param message Message contents
* @return Result of boolean evaluation
*/
bool eval(const CString& expression, const CString& context=CString(""), const CNick& nick=CNick(""), const CString& message=" ")
{
CString padded = expression.Replace_n("(", " ( ");
padded.Replace(")", " ) ");
VCString tokens;
padded.Split(" ", tokens, false);
PutDebug("Evaluating message: <" + nick.GetNick() + "> " + message);
bool result = eval_tokens(tokens.begin(), tokens.end(), context, nick, message);
return result;
}
#define expr(x, y) else if (token == x) { \
bool result = y; \
dbg += CString(x) + "/" + CString(result ? "true" : "false") + " "; \
value = oper ? value && result : value || result; \
}
/**
* Evaluate a tokenized boolean expression, or sub-expression.
*
* @param pos Token vector iterator current position
* @param end Token vector iterator end position
* @param context Notification context
* @param nick Sender nick
* @param message Message contents
* @return Result of boolean expression
*/
bool eval_tokens(VCString::iterator pos, VCString::iterator end, const CString& context, const CNick& nick, const CString& message)
{
bool oper = true;
bool value = true;
CString dbg = "";
for(; pos != end; pos++)
{
CString token = pos->AsLower();
if (token == "(")
{
// recursively evaluate sub-expressions
bool inner = eval_tokens(++pos, end, context, nick, message);
dbg += "( inner/" + CString(inner ? "true" : "false") + " ) ";
value = oper ? value && inner : value || inner;
// search ahead to the matching parenthesis token
unsigned int parens = 1;
while(pos != end)
{
if (*pos == "(")
{
parens++;
}
else if (*pos == ")")
{
parens--;
}
if (parens == 0)
{
break;
}
pos++;
}
}
else if (token == ")")
{
pos++;
PutDebug(dbg);
return value;
}
else if (token == "and")
{
dbg += "and ";
oper = true;
}
else if (token == "or")
{
dbg += "or ";
oper = false;
}
expr("true", true)
expr("false", false)
expr("away_only", away_only())
expr("client_count_less_than", client_count_less_than())
expr("highlight", highlight(message))
expr("idle", idle())
expr("last_active", last_active(context))
expr("last_notification", last_notification(context))
expr("nick_blacklist", nick_blacklist(nick))
expr("replied", replied(context))
else
{
PutModule("Error: Unexpected token \"" + token + "\"");
}
}
PutDebug(dbg);
return value;
}
#undef expr
protected:
/**
* Check if the away status condition is met.
*
* @return True if away_only is not "yes" or away status is set
*/
bool away_only()
{
CString value = options["away_only"].AsLower();
return value != "yes" || GetNetwork()->IsIRCAway();
}
/**
* Check how many clients are connected to ZNC.
*
* @return Number of connected clients
*/
size_t client_count()
{
return GetNetwork()->GetClients().size();
}
/**
* Check if the client_count condition is met.
*
* @return True if client_count is less than client_count_less_than or if client_count_less_than is zero
*/
bool client_count_less_than()
{
unsigned int value = options["client_count_less_than"].ToUInt();
return value == 0 || client_count() < value;
}
/**
* Determine if the given message matches any highlight rules.
*
* @param message Message contents
* @return True if message matches a highlight
*/
bool highlight(const CString& message)
{
CString msg = " " + message.AsLower() + " ";
VCString values;
options["highlight"].Split(" ", values, false);
values.push_back("%nick%");
for (VCString::iterator i = values.begin(); i != values.end(); i++)
{
CString value = i->AsLower();
char prefix = value[0];
bool push = true;
if (prefix == '-')
{
push = false;
value.LeftChomp(1);
}
else if (prefix == '_')
{
value = " " + value.LeftChomp_n(1) + " ";
}
// Expand substrings like %nick%
if (m_pNetwork)
{
value = m_pNetwork->ExpandString(value);
}
else
{
value = GetUser()->ExpandString(value);
}
value = "*" + value.AsLower() + "*";
if (msg.WildCmp(value))
{
return push;
}
}
return false;
}
/**
* Check if the idle condition is met.
*
* @return True if idle is less than or equal to zero or elapsed time is greater than idle
*/
bool idle()
{
unsigned int value = options["idle"].ToUInt();
time_t now = time(NULL);
return value == 0 || difftime(now, idle_time) >= value;
}
/**
* Check if the last_active condition is met.
*
* @param context Channel or nick context
* @return True if last_active is less than or equal to zero or elapsed time is greater than last_active
*/
bool last_active(const CString& context)
{
unsigned int value = options["last_active"].ToUInt();
time_t now = time(NULL);
return value == 0
|| last_active_time.count(context) < 1
|| difftime(now, last_active_time[context]) >= value;
}
/**
* Check if the last_notification condition is met.
*
* @param context Channel or nick context
* @return True if last_notification is less than or equal to zero or elapsed time is greater than last_nofication
*/
bool last_notification(const CString& context)
{
unsigned int value = options["last_notification"].ToUInt();
time_t now = time(NULL);
return value == 0
|| last_notification_time.count(context) < 1
|| difftime(now, last_notification_time[context]) >= value;
}
/**
* Check if the nick_blacklist condition is met.
*
* @param nick Nick that sent the message
* @return True if nick is not in the blacklist
*/
bool nick_blacklist(const CNick& nick)
{
VCString blacklist;
options["nick_blacklist"].Split(" ", blacklist, false);
CString name = nick.GetNick().AsLower();
for (VCString::iterator i = blacklist.begin(); i != blacklist.end(); i++)
{
CString value;
// Expand substrings like %nick%
if (m_pNetwork)
{
value = m_pNetwork->ExpandString(*i);
}
else
{
value = GetUser()->ExpandString(*i);
}
if (name.WildCmp(value.AsLower()))
{
return false;
}
}
return true;
}
/**
* Check if the replied condition is met.
*
* @param context Channel or nick context
* @return True if last_reply_time > last_notification_time or if replied is not "yes"
*/
bool replied(const CString& context)
{
CString value = options["replied"].AsLower();
return value != "yes"
|| last_notification_time[context] == 0
|| last_notification_time[context] < last_reply_time[context];
}
/**
* Determine when to notify the user of a channel message.
*
* @param nick Nick that sent the message
* @param channel Channel the message was sent to
* @param message Message contents
* @return Notification should be sent
*/
bool notify_channel(const CNick& nick, const CChan& channel, const CString& message)
{
CString context = channel.GetName();
CString expression = options["channel_conditions"].AsLower();
if (expression != "all")
{
return eval(expression, context, nick, message);
}
return away_only()
&& client_count_less_than()
&& highlight(message)
&& idle()
&& last_active(context)
&& last_notification(context)
&& nick_blacklist(nick)
&& replied(context)
&& true;
}
/**
* Determine when to notify the user of a private message.
*
* @param nick Nick that sent the message
* @return Notification should be sent
*/
bool notify_pm(const CNick& nick, const CString& message)
{
CString context = nick.GetNick();
CString expression = options["query_conditions"].AsLower();
if (expression != "all")
{
return eval(expression, context, nick, message);
}
return away_only()
&& client_count_less_than()
&& idle()
&& last_active(context)
&& last_notification(context)
&& nick_blacklist(nick)
&& replied(context)
&& true;
}
protected:
/**
* Handle the plugin being loaded. Retrieve plugin config values.
*
* @param args Plugin arguments
* @param message Message to show the user after loading
*/
bool OnLoad(const CString& args, CString& message)
{
for (MCString::iterator i = defaults.begin(); i != defaults.end(); i++)
{
CString value = GetNV(i->first);
if (value != "")
{
options[i->first] = value;
}
else
{
options[i->first] = defaults[i->first];
}
}
return true;
}
/**
* Handle channel messages.
*
* @param nick Nick that sent the message
* @param channel Channel the message was sent to
* @param message Message contents
*/
EModRet OnChanMsg(CNick& nick, CChan& channel, CString& message)
{
if (notify_channel(nick, channel, message))
{
CString title = "Highlight";
CString msg = channel.GetName();
msg += ": [" + nick.GetNick();
msg += "] " + message;
send_message(msg, title, channel.GetName(), nick);
}
return CONTINUE;
}
/**
* Handle channel actions.
*
* @param nick Nick that sent the action