summaryrefslogtreecommitdiffstats
blob: 3af505b82520099f7cb826d72a2b0c413a0fafd3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
/*
 * Copyright (c) 2013 Kevin Smith
 * Licensed under the GNU General Public License v3.
 * See Documentation/Licenses/GPLv3.txt for more information.
 */

#include <Swift/Controllers/Chat/ChatMessageParser.h>

#include <vector>
#include <utility>

#include <boost/smart_ptr/make_shared.hpp>
#include <boost/algorithm/string.hpp>

#include <Swiften/Base/Regex.h>
#include <Swiften/Base/foreach.h>

#include <SwifTools/Linkify.h>


namespace Swift {

	ChatMessageParser::ChatMessageParser(const std::map<std::string, std::string>& emoticons, HighlightRulesListPtr highlightRules, bool mucMode)
	: emoticons_(emoticons), highlightRules_(highlightRules), mucMode_(mucMode)
	{
	}

	typedef std::pair<std::string, std::string> StringPair;

	ChatWindow::ChatMessage ChatMessageParser::parseMessageBody(const std::string& body, bool senderIsSelf) {
		ChatWindow::ChatMessage parsedMessage;
		std::string remaining = body;
		/* Parse one, URLs */
		while (!remaining.empty()) {
			bool found = false;
			std::pair<std::vector<std::string>, size_t> links = Linkify::splitLink(remaining);
			remaining = "";
			for (size_t i = 0; i < links.first.size(); i++) {
				const std::string& part = links.first[i];
				if (found) {
					// Must be on the last part, then
					remaining = part;
				}
				else {
					if (i == links.second) {
						found = true;
						parsedMessage.append(boost::make_shared<ChatWindow::ChatURIMessagePart>(part));
					}
					else {
						parsedMessage.append(boost::make_shared<ChatWindow::ChatTextMessagePart>(part));
					}
				}
			}
		}

		/* do emoticon substitution */
		parsedMessage = emoticonHighlight(parsedMessage);

		if (!senderIsSelf) { /* do not highlight our own messsages */
			/* do word-based color highlighting */
			parsedMessage = splitHighlight(parsedMessage);
		}

		return parsedMessage;
	}

	ChatWindow::ChatMessage ChatMessageParser::emoticonHighlight(const ChatWindow::ChatMessage& message)
	{
		std::string regexString;
		/* Parse two, emoticons */
		foreach (StringPair emoticon, emoticons_) {
			/* Construct a regexp that finds an instance of any of the emoticons inside a group */
			regexString += regexString.empty() ? "(" : "|";
			regexString += Regex::escape(emoticon.first);
		}

		if (regexString.empty()) {
			return message;
		}

		regexString += ")";
		boost::regex emoticonRegex(regexString);

		ChatWindow::ChatMessage newMessage;
		foreach (boost::shared_ptr<ChatWindow::ChatMessagePart> part, message.getParts()) {
			boost::shared_ptr<ChatWindow::ChatTextMessagePart> textPart;
			if ((textPart = boost::dynamic_pointer_cast<ChatWindow::ChatTextMessagePart>(part))) {
				try {
					boost::match_results<std::string::const_iterator> match;
					const std::string& text = textPart->text;
					std::string::const_iterator start = text.begin();
					while (regex_search(start, text.end(), match, emoticonRegex)) {
						std::string::const_iterator matchStart = match[0].first;
						std::string::const_iterator matchEnd = match[0].second;
						if (start != matchStart) {
							/* If we're skipping over plain text since the previous emoticon, record it as plain text */
							newMessage.append(boost::make_shared<ChatWindow::ChatTextMessagePart>(std::string(start, matchStart)));
						}
						boost::shared_ptr<ChatWindow::ChatEmoticonMessagePart> emoticonPart = boost::make_shared<ChatWindow::ChatEmoticonMessagePart>();
						std::map<std::string, std::string>::const_iterator emoticonIterator = emoticons_.find(match.str());
						assert (emoticonIterator != emoticons_.end());
						const StringPair& emoticon = *emoticonIterator;
						emoticonPart->imagePath = emoticon.second;
						emoticonPart->alternativeText = emoticon.first;
						newMessage.append(emoticonPart);
						start = matchEnd;
					}
					if (start != text.end()) {
						/* If there's plain text after the last emoticon, record it */
						newMessage.append(boost::make_shared<ChatWindow::ChatTextMessagePart>(std::string(start, text.end())));
					}
				}
				catch (std::runtime_error) {
					/* Basically too expensive to compute the regex results and it gave up, so pass through as text */
					newMessage.append(part);
				}
			} else {
				newMessage.append(part);
			}
		}

		return newMessage;
	}

	ChatWindow::ChatMessage ChatMessageParser::splitHighlight(const ChatWindow::ChatMessage& message)
	{
		ChatWindow::ChatMessage parsedMessage = message;

		for (size_t i = 0; i < highlightRules_->getSize(); ++i) {
			const HighlightRule& rule = highlightRules_->getRule(i);
			if (rule.getMatchMUC() && !mucMode_) {
				continue; /* this rule only applies to MUC's, and this is a CHAT */
			} else if (rule.getMatchChat() && mucMode_) {
				continue; /* this rule only applies to CHAT's, and this is a MUC */
			}
			foreach(const boost::regex &regex, rule.getKeywordRegex()) {
				ChatWindow::ChatMessage newMessage;
				foreach (boost::shared_ptr<ChatWindow::ChatMessagePart> part, parsedMessage.getParts()) {
					boost::shared_ptr<ChatWindow::ChatTextMessagePart> textPart;
					if ((textPart = boost::dynamic_pointer_cast<ChatWindow::ChatTextMessagePart>(part))) {
						try {
							boost::match_results<std::string::const_iterator> match;
							const std::string& text = textPart->text;
							std::string::const_iterator start = text.begin();
							while (regex_search(start, text.end(), match, regex)) {
								std::string::const_iterator matchStart = match[0].first;
								std::string::const_iterator matchEnd = match[0].second;
								if (start != matchStart) {
									/* If we're skipping over plain text since the previous emoticon, record it as plain text */
									newMessage.append(boost::make_shared<ChatWindow::ChatTextMessagePart>(std::string(start, matchStart)));
								}
								boost::shared_ptr<ChatWindow::ChatHighlightingMessagePart> highlightPart = boost::make_shared<ChatWindow::ChatHighlightingMessagePart>();
								highlightPart->text = match.str();
								highlightPart->foregroundColor = rule.getAction().getTextColor();
								highlightPart->backgroundColor = rule.getAction().getTextBackground();
								newMessage.append(highlightPart);
								start = matchEnd;
							}
							if (start != text.end()) {
								/* If there's plain text after the last emoticon, record it */
								newMessage.append(boost::make_shared<ChatWindow::ChatTextMessagePart>(std::string(start, text.end())));
							}
						}
						catch (std::runtime_error) {
							/* Basically too expensive to compute the regex results and it gave up, so pass through as text */
							newMessage.append(part);
						}
					} else {
						newMessage.append(part);
					}
				}
				parsedMessage = newMessage;
			}
		}

		return parsedMessage;
	}
}