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1 /**
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2 * Advanced authorization plugin for Orthanc
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3 * Copyright (C) 2017 Osimis, Belgium
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4 *
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5 * This program is free software: you can redistribute it and/or
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6 * modify it under the terms of the GNU Affero General Public License
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7 * as published by the Free Software Foundation, either version 3 of
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8 * the License, or (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful, but
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 * Affero General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU Affero General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 **/
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18
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19 #include "ResourceHierarchyCache.h"
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20
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21 #include "../Resources/Orthanc/Core/Logging.h"
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22 #include "../Resources/Orthanc/Core/OrthancException.h"
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23
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24 #include <boost/lexical_cast.hpp>
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25
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26 namespace OrthancPlugins
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27 {
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28 std::string ResourceHierarchyCache::ComputeKey(Orthanc::ResourceType level,
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29 const std::string identifier) const
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30 {
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31 return boost::lexical_cast<std::string>(level) + "|" + identifier;
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32 }
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33
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34
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35 void ResourceHierarchyCache::LinkParent(const OrthancResource& child,
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36 const OrthancResource& parent)
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37 {
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38 LOG(INFO) << "Linking " << Orthanc::EnumerationToString(child.GetLevel())
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39 << " \"" << child.GetIdentifier() << "\" to its parent "
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40 << Orthanc::EnumerationToString(parent.GetLevel())
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41 << " \"" << parent.GetIdentifier() << "\"";
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42
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43 cache_->Store(ComputeKey(child), parent.GetIdentifier(), 0 /* no expiration */);
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44 }
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45
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46
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47 bool ResourceHierarchyCache::LookupParent(std::string& target,
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48 const OrthancResource& resource)
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49 {
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50 std::string key = ComputeKey(resource);
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51
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52 if (cache_->Retrieve(target, key))
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53 {
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54 // The parent was already stored in the cache
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55 return true;
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56 }
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57
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58 // Not in the cache, reading the resource from the Orthanc store
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59 std::string dicomUid;
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60 OrthancResource parent;
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61 std::list<OrthancResource> children;
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62
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63 if (!resource.GetHierarchy(dicomUid, parent, children, context_))
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64 {
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65 // The resource is non-existing (*)
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66 return false;
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67 }
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68
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69 orthancToDicom_->Store(key, dicomUid, 0 /* no expiration */);
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70 dicomToOrthanc_->Store(ComputeKey(resource.GetLevel(), dicomUid),
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71 resource.GetIdentifier(), 0 /* no expiration */);
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72
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73 for (std::list<OrthancResource>::const_iterator
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74 it = children.begin(); it != children.end(); ++it)
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75 {
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76 // Cache the relation of the resource with its children
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77 LinkParent(*it, resource);
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78 }
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79
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80 if (parent.IsValid())
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81 {
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82 LinkParent(resource, parent);
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83 target = parent.GetIdentifier();
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84 return true;
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85 }
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86 else
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87 {
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88 // We reached the patient level, or the resource was removed
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89 // from Orthanc since (*)
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90 return false;
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91 }
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92 }
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93
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94
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95 ResourceHierarchyCache::ResourceHierarchyCache(OrthancPluginContext* context,
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96 ICacheFactory& factory) :
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97 context_(context),
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98 cache_(factory.Create()),
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99 orthancToDicom_(factory.Create()),
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100 dicomToOrthanc_(factory.Create())
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101 {
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102 if (cache_.get() == NULL)
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103 {
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104 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
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105 }
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106 }
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107
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108
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109 void ResourceHierarchyCache::Invalidate(Orthanc::ResourceType level,
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110 const std::string& identifier)
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111 {
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112 LOG(INFO) << "Invalidating " << Orthanc::EnumerationToString(level)
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113 << " resource with ID: " << identifier;
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114
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115 std::string key = ComputeKey(level, identifier);
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116 cache_->Invalidate(key);
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117 orthancToDicom_->Invalidate(key);
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118 }
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119
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120
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121 bool ResourceHierarchyCache::LookupSeries(std::string& patient,
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122 std::string& study,
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123 const std::string& series)
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124 {
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125 if (LookupParent(study, Orthanc::ResourceType_Series, series))
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126 {
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127 return LookupStudy(patient, study);
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128 }
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129 else
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130 {
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131 return false;
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132 }
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133 }
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134
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135
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136 bool ResourceHierarchyCache::LookupInstance(std::string& patient,
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137 std::string& study,
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138 std::string& series,
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139 const std::string& instance)
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140 {
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141 if (LookupParent(series, Orthanc::ResourceType_Instance, instance))
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142 {
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143 return LookupSeries(patient, study, series);
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144 }
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145 else
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146 {
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147 return false;
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148 }
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149 }
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150
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151
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152 bool ResourceHierarchyCache::LookupDicomUid(std::string& target,
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153 Orthanc::ResourceType level,
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154 const std::string& orthancId)
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155 {
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156 std::string key = ComputeKey(level, orthancId);
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157
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158 if (orthancToDicom_->Retrieve(target, key))
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159 {
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160 return true;
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161 }
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162
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163 OrthancResource resource(level, orthancId);
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164
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165 if (resource.GetDicomUid(target, context_))
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166 {
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167 orthancToDicom_->Store(key, target, 0 /* no expiration */);
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168 return true;
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169 }
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170 else
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171 {
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172 return false;
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173 }
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174 }
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175
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176
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177 bool ResourceHierarchyCache::LookupOrthancId(std::string& target,
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178 Orthanc::ResourceType level,
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179 const std::string& dicomUid)
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180 {
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181 std::string key = ComputeKey(level, dicomUid);
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182
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183 if (dicomToOrthanc_->Retrieve(target, key))
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184 {
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185 return true;
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186 }
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187
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188 OrthancResource resource(level, dicomUid);
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189
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190 if (OrthancResource::LookupOrthancId(target, context_, level, dicomUid))
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191 {
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192 dicomToOrthanc_->Store(key, target, 0 /* no expiration */);
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193 return true;
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194 }
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195 else
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196 {
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197 return false;
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198 }
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199 }
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200 }
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