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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/***************************************************************************
copyright : (C) 2008 by Robby Stephenson
email : robby@periapsis.org
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of version 2 of the GNU General Public License as *
* published by the Free Software Foundation; *
* *
***************************************************************************/
#include "googlescholarfetcher.h"
#include "messagehandler.h"
#include "../filehandler.h"
#include "../translators/bibteximporter.h"
#include "../collection.h"
#include "../entry.h"
#include "../tellico_kernel.h"
#include "../tellico_debug.h"
#include <tdelocale.h>
#include <tdeconfig.h>
#include <tdeio/job.h>
#include <tqlabel.h>
#include <tqlayout.h>
namespace {
static const size_t GOOGLE_MAX_RETURNS_TOTAL = 20;
static const char* SCHOLAR_BASE_URL = "http://scholar.google.com/scholar";
}
using Tellico::Fetch::GoogleScholarFetcher;
GoogleScholarFetcher::GoogleScholarFetcher(TQObject* parent_, const char* name_)
: Fetcher(parent_, name_),
m_limit(GOOGLE_MAX_RETURNS_TOTAL), m_start(0), m_job(0), m_started(false),
m_cookieIsSet(false) {
m_bibtexRx = TQRegExp(TQString::fromLatin1("<a\\s.*href\\s*=\\s*\"([^>]*scholar\\.bib[^>]*)\""));
m_bibtexRx.setMinimal(true);
}
GoogleScholarFetcher::~GoogleScholarFetcher() {
}
TQString GoogleScholarFetcher::defaultName() {
// no i18n
return TQString::fromLatin1("Google Scholar");
}
TQString GoogleScholarFetcher::source() const {
return m_name.isEmpty() ? defaultName() : m_name;
}
bool GoogleScholarFetcher::canFetch(int type) const {
return type == Data::Collection::Bibtex;
}
void GoogleScholarFetcher::readConfigHook(const TDEConfigGroup& config_) {
Q_UNUSED(config_);
}
void GoogleScholarFetcher::search(FetchKey key_, const TQString& value_) {
if(!m_cookieIsSet) {
// have to set preferences to have bibtex output
FileHandler::readTextFile(TQString::fromLatin1("http://scholar.google.com/scholar_setprefs?num=100&scis=yes&scisf=4&submit=Save+Preferences"), true);
m_cookieIsSet = true;
}
m_key = key_;
m_value = value_;
m_started = true;
m_start = 0;
m_total = -1;
doSearch();
}
void GoogleScholarFetcher::continueSearch() {
m_started = true;
doSearch();
}
void GoogleScholarFetcher::doSearch() {
// myDebug() << "GoogleScholarFetcher::search() - value = " << value_ << endl;
if(!canFetch(Kernel::self()->collectionType())) {
message(i18n("%1 does not allow searching for this collection type.").arg(source()), MessageHandler::Warning);
stop();
return;
}
KURL u(TQString::fromLatin1(SCHOLAR_BASE_URL));
u.addQueryItem(TQString::fromLatin1("start"), TQString::number(m_start));
switch(m_key) {
case Title:
u.addQueryItem(TQString::fromLatin1("q"), TQString::fromLatin1("allintitle:%1").arg(m_value));
break;
case Keyword:
u.addQueryItem(TQString::fromLatin1("q"), m_value);
break;
case Person:
u.addQueryItem(TQString::fromLatin1("q"), TQString::fromLatin1("author:%1").arg(m_value));
break;
default:
kdWarning() << "GoogleScholarFetcher::search() - key not recognized: " << m_key << endl;
stop();
return;
}
// myDebug() << "GoogleScholarFetcher::search() - url: " << u.url() << endl;
m_job = TDEIO::get(u, false, false);
connect(m_job, TQT_SIGNAL(data(TDEIO::Job*, const TQByteArray&)),
TQT_SLOT(slotData(TDEIO::Job*, const TQByteArray&)));
connect(m_job, TQT_SIGNAL(result(TDEIO::Job*)),
TQT_SLOT(slotComplete(TDEIO::Job*)));
}
void GoogleScholarFetcher::stop() {
if(!m_started) {
return;
}
if(m_job) {
m_job->kill();
m_job = 0;
}
m_data.truncate(0);
m_started = false;
emit signalDone(this);
}
void GoogleScholarFetcher::slotData(TDEIO::Job*, const TQByteArray& data_) {
TQDataStream stream(m_data, IO_WriteOnly | IO_Append);
stream.writeRawBytes(data_.data(), data_.size());
}
void GoogleScholarFetcher::slotComplete(TDEIO::Job* job_) {
// myDebug() << "GoogleScholarFetcher::slotComplete()" << endl;
// since the fetch is done, don't worry about holding the job pointer
m_job = 0;
if(job_->error()) {
job_->showErrorDialog(Kernel::self()->widget());
stop();
return;
}
if(m_data.isEmpty()) {
myDebug() << "GoogleScholarFetcher::slotComplete() - no data" << endl;
stop();
return;
}
TQString text = TQString::fromUtf8(m_data, m_data.size());
TQString bibtex;
size_t count = 0;
for(int pos = text.find(m_bibtexRx); count < m_limit && pos > -1; pos = text.find(m_bibtexRx, pos+m_bibtexRx.matchedLength()), ++count) {
KURL bibtexUrl(TQString::fromLatin1(SCHOLAR_BASE_URL), m_bibtexRx.cap(1));
// myDebug() << bibtexUrl << endl;
bibtex += FileHandler::readTextFile(bibtexUrl, true);
}
Import::BibtexImporter imp(bibtex);
Data::CollPtr coll = imp.collection();
if(!coll) {
myDebug() << "GoogleScholarFetcher::slotComplete() - no collection pointer" << endl;
stop();
return;
}
count = 0;
Data::EntryVec entries = coll->entries();
for(Data::EntryVec::Iterator entry = entries.begin(); count < m_limit && entry != entries.end(); ++entry, ++count) {
if(!m_started) {
// might get aborted
break;
}
TQString desc = entry->field(TQString::fromLatin1("author"))
+ TQChar('/') + entry->field(TQString::fromLatin1("publisher"));
if(!entry->field(TQString::fromLatin1("year")).isEmpty()) {
desc += TQChar('/') + entry->field(TQString::fromLatin1("year"));
}
SearchResult* r = new SearchResult(this, entry->title(), desc, entry->field(TQString::fromLatin1("isbn")));
m_entries.insert(r->uid, Data::EntryPtr(entry));
emit signalResultFound(r);
}
m_start = m_entries.count();
// m_hasMoreResults = m_start <= m_total;
m_hasMoreResults = false; // for now, no continued searches
stop(); // required
}
Tellico::Data::EntryPtr GoogleScholarFetcher::fetchEntry(uint uid_) {
return m_entries[uid_];
}
void GoogleScholarFetcher::updateEntry(Data::EntryPtr entry_) {
// myDebug() << "GoogleScholarFetcher::updateEntry()" << endl;
// limit to top 5 results
m_limit = 5;
TQString title = entry_->field(TQString::fromLatin1("title"));
if(!title.isEmpty()) {
search(Title, title);
return;
}
myDebug() << "GoogleScholarFetcher::updateEntry() - insufficient info to search" << endl;
emit signalDone(this); // always need to emit this if not continuing with the search
}
Tellico::Fetch::ConfigWidget* GoogleScholarFetcher::configWidget(TQWidget* parent_) const {
return new GoogleScholarFetcher::ConfigWidget(parent_, this);
}
GoogleScholarFetcher::ConfigWidget::ConfigWidget(TQWidget* parent_, const GoogleScholarFetcher*/*=0*/)
: Fetch::ConfigWidget(parent_) {
TQVBoxLayout* l = new TQVBoxLayout(optionsWidget());
l->addWidget(new TQLabel(i18n("This source has no options."), optionsWidget()));
l->addStretch();
}
TQString GoogleScholarFetcher::ConfigWidget::preferredName() const {
return GoogleScholarFetcher::defaultName();
}
#include "googlescholarfetcher.moc"
|
