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annotate OrthancServer/Sources/OrthancRestApi/OrthancRestChanges.cpp @ 5805:8a8756b2dd0b find-refactoring tip

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cleanup
author Alain Mazy <am@orthanc.team>
date Mon, 23 Sep 2024 16:03:02 +0200
parents 25df40a274fd
children
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium
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7 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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8 *
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9 * This program is free software: you can redistribute it and/or
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10 * modify it under the terms of the GNU General Public License as
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11 * published by the Free Software Foundation, either version 3 of the
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12 * License, or (at your option) any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful, but
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15 * WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU General Public License
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20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #include "../PrecompiledHeadersServer.h"
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25 #include "OrthancRestApi.h"
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26
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27 #include "../ServerContext.h"
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28
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29 namespace Orthanc
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30 {
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31 // Changes API --------------------------------------------------------------
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32 static const unsigned int DEFAULT_LIMIT = 100;
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33 static const int64_t DEFAULT_TO = -1;
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34
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35 static void GetSinceToAndLimit(int64_t& since,
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36 int64_t& to,
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37 unsigned int& limit,
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38 bool& last,
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39 const RestApiGetCall& call)
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40 {
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41 if (call.HasArgument("last"))
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42 {
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43 last = true;
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44 return;
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45 }
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47 last = false;
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48
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49 try
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50 {
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51 since = boost::lexical_cast<int64_t>(call.GetArgument("since", "0"));
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52 to = boost::lexical_cast<int64_t>(call.GetArgument("to", boost::lexical_cast<std::string>(DEFAULT_TO)));
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53 limit = boost::lexical_cast<unsigned int>(call.GetArgument("limit", boost::lexical_cast<std::string>(DEFAULT_LIMIT)));
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54 }
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55 catch (boost::bad_lexical_cast&)
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56 {
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57 since = 0;
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58 to = DEFAULT_TO;
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59 limit = DEFAULT_LIMIT;
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60 return;
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61 }
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62 }
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63
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64 static void GetChanges(RestApiGetCall& call)
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65 {
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66 if (call.IsDocumentation())
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67 {
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68 call.GetDocumentation()
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69 .SetTag("Tracking changes")
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70 .SetSummary("List changes")
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71 .SetDescription("Whenever Orthanc receives a new DICOM instance, this event is recorded in the so-called _Changes Log_. This enables remote scripts to react to the arrival of new DICOM resources. A typical application is auto-routing, where an external script waits for a new DICOM instance to arrive into Orthanc, then forward this instance to another modality. Please note that, when resources are deleted, their corresponding change entries are also removed from the Changes Log, which helps ensuring that this log does not grow indefinitely.")
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72 .SetHttpGetArgument("last", RestApiCallDocumentation::Type_Number, "Request only the last change id (this argument must be used alone)", false)
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73 .SetHttpGetArgument("limit", RestApiCallDocumentation::Type_Number, "Limit the number of results", false)
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74 .SetHttpGetArgument("since", RestApiCallDocumentation::Type_Number, "Show only the resources since the provided index excluded", false)
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75 .SetHttpGetArgument("to", RestApiCallDocumentation::Type_Number, "Show only the resources till the provided index included (only available if your DB backend supports ExtendedChanges)", false)
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76 .SetHttpGetArgument("type", RestApiCallDocumentation::Type_String, "Show only the changes of the provided type (only available if your DB backend supports ExtendedChanges)", false)
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77 .AddAnswerType(MimeType_Json, "The list of changes")
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78 .SetAnswerField("Changes", RestApiCallDocumentation::Type_JsonListOfObjects, "The individual changes")
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79 .SetAnswerField("Done", RestApiCallDocumentation::Type_Boolean,
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80 "Whether the last reported change is the last of the full history.")
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81 .SetAnswerField("Last", RestApiCallDocumentation::Type_Number,
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82 "The index of the last reported change, can be used for the `since` argument in subsequent calls to this route")
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83 .SetAnswerField("First", RestApiCallDocumentation::Type_Number,
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84 "The index of the first reported change, its value-1 can be used for the `to` argument in subsequent calls to this route when browsing the changes in reverse order")
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85 .SetHttpGetSample("https://orthanc.uclouvain.be/demo/changes?since=0&limit=2", true);
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86 return;
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87 }
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88
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89 ServerContext& context = OrthancRestApi::GetContext(call);
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90
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91 int64_t since, to;
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92 std::set<ChangeType> filterType;
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93
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94 unsigned int limit;
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95 bool last;
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96 GetSinceToAndLimit(since, to, limit, last, call);
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97
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98 std::string filterArgument = call.GetArgument("type", "all");
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99 if (filterArgument != "all" && filterArgument != "All")
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100 {
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101 std::set<std::string> filterTypeStrings;
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102 Toolbox::SplitString(filterTypeStrings, filterArgument, ';');
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103
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104 for (std::set<std::string>::const_iterator it = filterTypeStrings.begin(); it != filterTypeStrings.end(); ++it)
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105 {
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106 filterType.insert(StringToChangeType(*it));
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107 }
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108 }
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109
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110 Json::Value result;
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111 if (last)
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112 {
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113 context.GetIndex().GetLastChange(result);
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114 }
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115 else if (context.GetIndex().HasExtendedChanges())
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116 {
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117 context.GetIndex().GetChangesExtended(result, since, to, limit, filterType);
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118 }
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119 else
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120 {
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121 if (filterType.size() > 0)
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122 {
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123 throw OrthancException(ErrorCode_ParameterOutOfRange, "CAPABILITIES: Trying to filter changes while the Database backend does not support it (requires a DB backend with support for ExtendedChanges)");
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124 }
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125
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126 if (to != DEFAULT_TO)
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127 {
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128 throw OrthancException(ErrorCode_ParameterOutOfRange, "CAPABILITIES: Trying to use the 'to' parameter in /changes while the Database backend does not support it (requires a DB backend with support for ExtendedChanges)");
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129 }
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130
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131 context.GetIndex().GetChanges(result, since, limit);
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132 }
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133
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134 call.GetOutput().AnswerJson(result);
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135 }
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136
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137
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138 static void DeleteChanges(RestApiDeleteCall& call)
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139 {
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140 if (call.IsDocumentation())
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141 {
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142 call.GetDocumentation()
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143 .SetTag("Tracking changes")
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144 .SetSummary("Clear changes")
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145 .SetDescription("Clear the full history stored in the changes log");
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146 return;
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147 }
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148
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149 OrthancRestApi::GetIndex(call).DeleteChanges();
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150 call.GetOutput().AnswerBuffer("", MimeType_PlainText);
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151 }
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152
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153
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154 // Exports API --------------------------------------------------------------
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155
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156 static void GetExports(RestApiGetCall& call)
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157 {
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158 if (call.IsDocumentation())
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159 {
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160 call.GetDocumentation()
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161 .SetTag("Tracking changes")
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162 .SetSummary("List exports")
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163 .SetDescription("For medical traceability, Orthanc can be configured to store a log of all the resources "
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164 "that have been exported to remote modalities. In auto-routing scenarios, it is important "
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165 "to prevent this log to grow indefinitely as incoming instances are routed. You can either "
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166 "disable this logging by setting the option `LogExportedResources` to `false` in the "
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167 "configuration file, or periodically clear this log by `DELETE`-ing this URI. This route "
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168 "might be removed in future versions of Orthanc.")
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169 .SetHttpGetArgument("limit", RestApiCallDocumentation::Type_Number, "Limit the number of results", false)
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170 .SetHttpGetArgument("since", RestApiCallDocumentation::Type_Number, "Show only the resources since the provided index", false)
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171 .AddAnswerType(MimeType_Json, "The list of exports");
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172 return;
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173 }
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174
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175 ServerContext& context = OrthancRestApi::GetContext(call);
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176
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177 int64_t since, to;
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178 unsigned int limit;
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179 bool last;
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180 GetSinceToAndLimit(since, to, limit, last, call);
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181
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182 Json::Value result;
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183 if (last)
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184 {
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185 context.GetIndex().GetLastExportedResource(result);
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186 }
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187 else
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188 {
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189 context.GetIndex().GetExportedResources(result, since, limit);
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190 }
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191
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192 call.GetOutput().AnswerJson(result);
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193 }
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194
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195
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196 static void DeleteExports(RestApiDeleteCall& call)
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197 {
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198 if (call.IsDocumentation())
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199 {
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200 call.GetDocumentation()
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201 .SetTag("Tracking changes")
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202 .SetSummary("Clear exports")
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203 .SetDescription("Clear the full history stored in the exports log");
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204 return;
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205 }
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206
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207 OrthancRestApi::GetIndex(call).DeleteExportedResources();
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208 call.GetOutput().AnswerBuffer("", MimeType_PlainText);
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209 }
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210
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211
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212 void OrthancRestApi::RegisterChanges()
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213 {
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214 Register("/changes", GetChanges);
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215 Register("/changes", DeleteChanges);
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216 Register("/exports", GetExports);
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217 Register("/exports", DeleteExports);
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218 }
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219 }