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annotate FileDBLink.cpp @ 3:7a44ba08673d

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author Tom Fredrik Blenning Klaussen <bfg@blenning.no>
date Tue, 21 Aug 2012 15:09:22 +0200
parents 2833b7f8884a
children b5943e4bf676
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1 #include "FileDBLink.hpp"
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2
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3 #include <QtCore/QDebug>
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4 #include <QtCore/QtConcurrentMap>
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5
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6 #include "PermissionException.hpp"
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7 #include "EditDistance.hpp"
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8
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9 #include <cassert>
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10
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11 #include <functional>
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12 #include <algorithm>
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13 #include <iostream>
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14
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15 #include <boost/bind.hpp>
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16
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17 void FileDBLink::updateIfModified(const QString& path)
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18 {
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19 QFileInfo fileinfo(path);
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20 FileDBLink::DBStatus status = existsWithMtime(path, fileinfo.lastModified());
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21
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22 switch (status) {
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23 case FileDBLink::NONE: {
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24 addFile(fileinfo);
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25 break;
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26 }
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27 case FileDBLink::MTIME_DIFFERENT: {
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28 updateFile(fileinfo);
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29 }
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30 default: {
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31 }
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32 }
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33 }
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34
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35 void FileDBLink::addFile(const QFileInfo& fileinfo)
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36 {
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37 addFile(fileinfo.absoluteFilePath(), fileinfo.size(), fileinfo.lastModified());
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38 }
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39
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40 void FileDBLink::addFile(const QString& path, qint64 size, const QDateTime& lastModified)
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41 {
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42 QCryptographicHash hash( QCryptographicHash::Sha1 );
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43 QFile file(path);
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44 if ( file.open( QIODevice::ReadOnly ) ) {
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45 hash.addData( file.readAll() );
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46 }
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47 else {
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48 QString errorMsg = path + ": " + file.errorString();
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49 qDebug()<<file.error();
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50 switch (file.error()) {
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51 case QFile::PermissionsError:
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52 throw PermissionException(errorMsg);
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53 default:
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54 throw IOException(errorMsg);
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55 }
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56 }
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57
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58 addFile(path, size, lastModified, hash.result());
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59
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60 }
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61
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62 void FileDBLink::updateFile(const QFileInfo& fileinfo)
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63 {
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64 updateFile(fileinfo.absoluteFilePath(), fileinfo.size(), fileinfo.lastModified());
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65 }
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66
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67 void FileDBLink::updateFile(const QString& path, qint64 size, const QDateTime& lastModified)
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68 {
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69 QCryptographicHash hash( QCryptographicHash::Sha1 );
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70 QFile file(path);
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71 if ( file.open( QIODevice::ReadOnly ) ) {
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72 hash.addData( file.readAll() );
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73 }
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74 else {
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75 QString errorMsg = path + ": " + file.errorString();
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76 qDebug()<<file.error();
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77 switch (file.error()) {
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78 case QFile::PermissionsError:
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79 throw PermissionException(errorMsg);
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80 default:
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81 throw IOException(errorMsg);
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82 }
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83 }
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84
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85 updateFile(path, size, lastModified, hash.result());
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86 }
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87
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88 const QList<QSharedPointer<FileDBLink::DBInfo> > FileDBLink::sortOn(const QString& prefix, SORTORDER order, bool extended)
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89 {
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90 QList<QSharedPointer<DBInfo> > list = (extended) ? computedValues(prefix) : values(prefix);
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91
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92 switch (order) {
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93 case PATH:
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94 {
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95 QList<QSharedPointer<FileDBLink::DBInfo> > oList;
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96 foreach(QSharedPointer<DBInfo> info, list) {
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97 oList.push_back(info);
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98 }
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99 return oList;
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100 }
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101 case SIZE:
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102 {
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103 QMultiMap<quint64, QSharedPointer<DBInfo> > oList;
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104 foreach(QSharedPointer<DBInfo> info, list) {
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105 oList.insert(info->size(), info);
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106 }
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107 return oList.values();
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108 }
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109 case MTIME:
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110 {
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111 QMultiMap<QDateTime, QSharedPointer<DBInfo> > oList;
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112 foreach(QSharedPointer<DBInfo> info, list) {
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113 oList.insert(info->mtime(), info);
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114 }
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115 return oList.values();
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116 }
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117 case CHECKSUM:
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118 {
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119 QMultiMap<QByteArray, QSharedPointer<DBInfo> > oList;
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120 foreach(QSharedPointer<DBInfo> info, list) {
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121 oList.insert(info->checksum(), info);
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122 }
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123 return oList.values();
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124 }
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125 case EDIT:
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126 {
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127 assert(extended);
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128 QMultiMap<int, QSharedPointer<DBInfo> > oList;
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129 foreach(QSharedPointer<DBInfo> info, list) {
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130 QSharedPointer<ExtendedDBInfo> ptr;
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131 ptr = info.dynamicCast<ExtendedDBInfo>();
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132 oList.insert(ptr->editDistance(), info);
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133 }
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134 return oList.values();
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135
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136 }
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137 }
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138 abort();
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139 }
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140
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141 QSharedPointer<FileDBLink::DBInfo> FileDBLink::computedValue(const QSharedPointer<DBInfo>& info,
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142 const QList<QSharedPointer<DBInfo> >& entries)
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143 {
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144 QString p1 = info->name();
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145 int minDist = 100000;
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146 QString other;
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147 for (QList<QSharedPointer<DBInfo> >::const_iterator it2 = entries.begin();
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148 it2 != entries.end(); ++it2) {
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149 if (info == *it2)
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150 continue;
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151 QString p2 = (*it2)->name();
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152 int dist = EditDistance::Compute(p1, p2, false);
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153 if (dist < minDist) {
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154 minDist = dist;
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155 other = (*it2)->path();
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156 }
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157 }
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158 return QSharedPointer<DBInfo>(new ExtendedDBInfo(*info, other, minDist));
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159 }
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160
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161 const QList<QSharedPointer<FileDBLink::DBInfo> > FileDBLink::computedValues(const QString& prefix) const
0
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162 {
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163 QList<QSharedPointer<DBInfo> > list;
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164 QList<QSharedPointer<DBInfo> > entries = values(prefix);
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165
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166 #if 1
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167 list = QtConcurrent::blockingMapped(entries, boost::bind( &FileDBLink::computedValue, _1, entries));
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168 #else
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169 for (QList<QSharedPointer<DBInfo> >::const_iterator it1 = entries.begin();
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170 it1 != entries.end(); ++it1) {
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171 QSharedPointer<DBInfo> ext = computedValue(*it1, entries);
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172 list.push_back(ext);
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173 }
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174 #endif
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175 return list;
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176 }