1 | /**********************************************************************
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2 | *
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3 | * dynamicclassifieraction.cpp --
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4 | * Copyright (C) 2008 DL Consulting Ltd
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5 | *
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6 | * A component of the Greenstone digital library software
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7 | * from the New Zealand Digital Library Project at the
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8 | * University of Waikato, New Zealand.
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9 | *
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10 | * This program is free software; you can redistribute it and/or modify
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11 | * it under the terms of the GNU General Public License as published by
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12 | * the Free Software Foundation; either version 2 of the License, or
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13 | * (at your option) any later version.
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14 | *
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15 | * This program is distributed in the hope that it will be useful,
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16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | * GNU General Public License for more details.
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19 | *
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20 | * You should have received a copy of the GNU General Public License
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21 | * along with this program; if not, write to the Free Software
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22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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23 | *
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24 | *********************************************************************/
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25 |
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26 | #include "dynamicclassifieraction.h"
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27 | #include "recptprototools.h"
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28 |
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29 |
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30 | dynamicclassifieraction::dynamicclassifieraction ()
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31 | {
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32 | recpt = NULL;
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33 |
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34 | cgiarginfo arg_ainfo;
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35 | arg_ainfo.shortname = "dcl";
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36 | arg_ainfo.longname = "dynamic classifier ID";
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37 | arg_ainfo.multiplechar = true;
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38 | arg_ainfo.defaultstatus = cgiarginfo::weak;
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39 | arg_ainfo.argdefault = "";
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40 | arg_ainfo.savedarginfo = cgiarginfo::must;
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41 | argsinfo.addarginfo (NULL, arg_ainfo);
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42 |
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43 | arg_ainfo.shortname = "dcn";
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44 | arg_ainfo.longname = "dynamic classifier node";
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45 | arg_ainfo.multiplechar = true;
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46 | arg_ainfo.defaultstatus = cgiarginfo::weak;
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47 | arg_ainfo.argdefault = "";
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48 | arg_ainfo.savedarginfo = cgiarginfo::must;
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49 | argsinfo.addarginfo (NULL, arg_ainfo);
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50 | }
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51 |
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52 |
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53 | dynamicclassifieraction::~dynamicclassifieraction()
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54 | {
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55 | }
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56 |
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57 |
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58 | bool dynamicclassifieraction::check_cgiargs (cgiargsinfoclass &argsinfo, cgiargsclass &args,
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59 | recptprotolistclass *protos, ostream &logout)
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60 | {
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61 | return true;
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62 | }
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63 |
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64 |
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65 | void dynamicclassifieraction::get_cgihead_info (cgiargsclass &args, recptprotolistclass *protos,
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66 | response_t &response,text_t &response_data,
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67 | ostream &logout)
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68 | {
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69 | response = content;
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70 | response_data = "text/html";
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71 | }
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72 |
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73 |
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74 | // define all the macros which might be used by other actions to produce pages.
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75 | void dynamicclassifieraction::define_external_macros (displayclass &disp, cgiargsclass &args,
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76 | recptprotolistclass *protos, ostream &logout)
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77 | {
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78 | // A valid collection server is vital
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79 | recptproto *collectproto = protos->getrecptproto (args["c"], logout);
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80 | if (collectproto == NULL)
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81 | {
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82 | logout << "dynamicclassifieraction::define_external_macros called with NULL collectproto\n";
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83 | return;
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84 | }
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85 |
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86 | // Define _dynamicclassifiernavbarentries_ to add buttons to the navigation bar for the dynamic classifiers
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87 | text_t navigation_bar_entries = "";
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88 | ColInfoResponse_t *cinfo = recpt->get_collectinfo_ptr (collectproto, args["c"], logout);
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89 | text_tmap::iterator dynamic_classifier_iterator = cinfo->dynamic_classifiers.begin();
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90 | while (dynamic_classifier_iterator != cinfo->dynamic_classifiers.end())
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91 | {
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92 | text_t dynamic_classifier_id = (*dynamic_classifier_iterator).first;
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93 | navigation_bar_entries += "_navbarspacer_";
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94 | navigation_bar_entries += "_navtab_(_gwcgi_?c=" + args["c"] + "&a=dc&dcl=" + dynamic_classifier_id + "," + dynamic_classifier_id;
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95 | if (args["a"] == "dc" && args["dcl"] == dynamic_classifier_id)
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96 | {
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97 | navigation_bar_entries += ",selected";
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98 | }
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99 | navigation_bar_entries += ")";
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100 | dynamic_classifier_iterator++;
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101 | }
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102 |
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103 | disp.setmacro("dynamicclassifiernavbarentries", displayclass::defaultpackage, navigation_bar_entries);
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104 | }
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105 |
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106 |
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107 | // define all the macros which are related to pages generated
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108 | // by this action. we also load up the formatinfo structure
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109 | // here (it's used in do_action as well as here)
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110 | void dynamicclassifieraction::define_internal_macros (displayclass &disp, cgiargsclass &args,
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111 | recptprotolistclass *protos, ostream &logout)
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112 | {
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113 | // define_internal_macros sets the following macros:
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114 | }
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115 |
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116 |
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117 | bool dynamicclassifieraction::do_action(cgiargsclass &args, recptprotolistclass *protos,
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118 | browsermapclass *browsers, displayclass &disp,
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119 | outconvertclass &outconvert, ostream &textout,
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120 | ostream &logout)
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121 | {
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122 | // A valid collection server is vital
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123 | recptproto *collectproto = protos->getrecptproto (args["c"], logout);
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124 | if (collectproto == NULL)
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125 | {
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126 | logout << "dynamicclassifieraction::do_action called with NULL collectproto\n";
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127 | return false;
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128 | }
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129 |
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130 | textout << outconvert << disp << "_dynamicclassifier:header_\n";
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131 | textout << outconvert << disp << "_dynamicclassifier:content_\n";
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132 |
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133 | // Check a dynamic classifier ID has been specified
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134 | text_t arg_dcl = args["dcl"];
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135 | if (arg_dcl.empty())
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136 | {
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137 | textout << outconvert << disp << "Error: Missing dcl argument.\n";
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138 | textout << outconvert << disp << "_dynamicclassifier:footer_\n";
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139 | return true;
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140 | }
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141 |
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142 | // Check the dynamic classifier ID is valid (ie. there is an entry in the collect.cfg file for it)
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143 | ColInfoResponse_t *cinfo = recpt->get_collectinfo_ptr (collectproto, args["c"], logout);
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144 | if (cinfo->dynamic_classifiers.find(arg_dcl) == cinfo->dynamic_classifiers.end())
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145 | {
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146 | textout << outconvert << disp << "Error: Invalid dcl value \"" << arg_dcl << "\".\n";
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147 | textout << outconvert << disp << "_dynamicclassifier:footer_\n";
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148 | return true;
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149 | }
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150 |
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151 | // Parse the classifier options from the specification
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152 | text_t classifier_specification = cinfo->dynamic_classifiers[arg_dcl];
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153 | text_tmap classifier_options = parse_classifier_options (classifier_specification, args);
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154 |
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155 | // Output the "<ID>Header" format statement if there is one
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156 | text_t classifier_header_format_statement = "";
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157 | get_formatstring (arg_dcl + "Header", cinfo->format, classifier_header_format_statement);
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158 | textout << outconvert << disp << classifier_header_format_statement << "\n";
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159 |
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160 | // Output the dynamic classifier, beginning with the (optional) grouping nodes
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161 | text_t selected_grouping_node_OID = "";
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162 | if (!classifier_options["-group_using"].empty())
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163 | {
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164 | selected_grouping_node_OID = output_grouping_nodes (classifier_options, args, collectproto, browsers, disp, outconvert, textout, logout);
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165 | }
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166 |
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167 | // Prepare to output the classifier (and maybe document) nodes
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168 | text_t classifier_node_OID = args["dcn"];
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169 | int classifier_node_indent = 0;
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170 |
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171 | // Simple case at the top level: just output the child classifier nodes
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172 | if (args["dcn"] == selected_grouping_node_OID)
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173 | {
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174 | text_t metadata_value_filter = args["dcn"] + "*";
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175 | output_child_classifier_nodes (classifier_node_OID, metadata_value_filter, classifier_node_indent, classifier_options, args, collectproto, browsers, disp, outconvert, textout, logout);
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176 | }
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177 |
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178 | // More complex case below the top level
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179 | else
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180 | {
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181 | // Output the parent classifier nodes
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182 | output_parent_classifier_nodes (classifier_node_OID, classifier_node_indent, classifier_options, args, collectproto, browsers, disp, outconvert, textout, logout);
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183 |
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184 | // Display the selected classifier node
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185 | text_tarray classifier_node_labels;
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186 | splitchar(classifier_node_OID.begin(), classifier_node_OID.end(), '|', classifier_node_labels);
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187 | text_t classifier_node_label = classifier_node_labels.back();
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188 | text_t classifier_node_numleafdocs = "?";
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189 | display_classifier_node (classifier_node_OID, classifier_node_label, classifier_node_numleafdocs, classifier_node_indent, args, collectproto, browsers, disp, outconvert, textout, logout);
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190 | classifier_node_indent++;
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191 |
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192 | // Output the child classifier nodes
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193 | text_t metadata_value_filter = args["dcn"] + "|*";
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194 | output_child_classifier_nodes (classifier_node_OID, metadata_value_filter, classifier_node_indent, classifier_options, args, collectproto, browsers, disp, outconvert, textout, logout);
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195 |
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196 | // Get the document nodes at this level
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197 | text_t metadata_element_name = classifier_options["metadata_element_name"];
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198 | text_t classifier_node_metadata_value = args["dcn"];
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199 | text_t sort_documents_by = classifier_options["-sort_documents_by"];
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200 | FilterResponse_t documents_response;
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201 | get_documents_with_metadata_value (metadata_element_name, classifier_node_metadata_value, sort_documents_by, args["c"], collectproto, documents_response, logout);
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202 |
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203 | // Display the document nodes
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204 | display_document_nodes (documents_response, classifier_node_indent, args, collectproto, browsers, disp, outconvert, textout, logout);
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205 | }
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206 |
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207 | // Output the "<ID>Footer" format statement if there is one
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208 | text_t classifier_footer_format_statement = "";
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209 | get_formatstring (arg_dcl + "Footer", cinfo->format, classifier_footer_format_statement);
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210 | textout << outconvert << disp << classifier_footer_format_statement << "\n";
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211 |
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212 | textout << outconvert << disp << "_dynamicclassifier:footer_\n";
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213 | return true;
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214 | }
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215 |
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216 |
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217 | text_tmap dynamicclassifieraction::parse_classifier_options (text_t classifier_specification, cgiargsclass &args)
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218 | {
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219 | text_tmap classifier_options;
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220 |
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221 | // Split the classifier specification string by spaces
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222 | text_tlist classifier_specification_parts;
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223 | splitchar (classifier_specification.begin(), classifier_specification.end(), ' ', classifier_specification_parts);
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224 |
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225 | // The metadata element to classify by should be the first value
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226 | classifier_options["metadata_element_name"] = classifier_specification_parts.front();
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227 | classifier_specification_parts.pop_front();
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228 |
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229 | // Parse options from the remainder of the classifier specification
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230 | while (!classifier_specification_parts.empty())
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231 | {
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232 | // Parse the option name
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233 | text_t classifier_option_name = classifier_specification_parts.front();
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234 | classifier_specification_parts.pop_front();
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235 |
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236 | // Check if the option has a value (it may just be a flag, in which case we use "1" as the value)
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237 | text_t classifier_option_value = "1";
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238 | if (!classifier_specification_parts.empty() && !starts_with(classifier_specification_parts.front(), "-"))
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239 | {
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240 | classifier_option_value = classifier_specification_parts.front();
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241 | classifier_specification_parts.pop_front();
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242 | }
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243 |
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244 | // Record the option
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245 | classifier_options[classifier_option_name] = classifier_option_value;
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246 | }
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247 |
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248 | return classifier_options;
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249 | }
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250 |
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251 |
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252 | text_t dynamicclassifieraction::output_grouping_nodes (text_tmap classifier_options, cgiargsclass &args,
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253 | recptproto *collectproto, browsermapclass *browsers,
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254 | displayclass &disp, outconvertclass &outconvert,
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255 | ostream &textout, ostream &logout)
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256 | {
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257 | // Get all the metadata values for the specified element, and group them according to the "-group_using" value
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258 | text_t metadata_element_name = classifier_options["metadata_element_name"];
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259 | text_t metadata_value_grouping_expression = classifier_options["-group_using"];
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260 | FilterResponse_t grouping_nodes_response;
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261 | bool request_success = get_metadata_values (metadata_element_name, "", metadata_value_grouping_expression, args["c"], collectproto, grouping_nodes_response, logout);
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262 |
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263 | // If the request failed then it's probably because the collection isn't using an SQL infodbtype
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264 | if (request_success == false)
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265 | {
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266 | textout << outconvert << disp << "Error: Dynamic classifier functionality is not available. Please check you are using an SQL infodbtype and the collection has been rebuilt.\n";
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267 | return "";
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268 | }
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269 |
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270 | // Check some grouping nodes were returned
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271 | if (grouping_nodes_response.docInfo.empty())
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272 | {
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273 | return "";
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274 | }
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275 |
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276 | // If no classifier node has been specified automatically go to the first grouping node
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277 | if (args["dcn"] == "")
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278 | {
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279 | args["dcn"] = grouping_nodes_response.docInfo.front().OID;
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280 | }
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281 |
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282 | text_t selected_grouping_node_OID = "";
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283 | ResultDocInfo_tarray::iterator grouping_node_iterator = grouping_nodes_response.docInfo.begin();
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284 | while (grouping_node_iterator != grouping_nodes_response.docInfo.end())
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285 | {
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286 | // Is this the grouping node that is currently selected?
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287 | if ((*grouping_node_iterator).OID == args["dcn"])
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288 | {
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289 | selected_grouping_node_OID = (*grouping_node_iterator).OID;
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290 | }
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291 |
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292 | // Add the necessary metadata required to display the grouping nodes correctly
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293 | (*grouping_node_iterator).metadata["doctype"].values.push_back ("classify");
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294 | (*grouping_node_iterator).metadata["haschildren"].values.push_back ("1");
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295 | (*grouping_node_iterator).metadata["numleafdocs"].values.push_back ("?"); // We can't determine this without more database requests
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296 | (*grouping_node_iterator).metadata["Title"].values.push_back ((*grouping_node_iterator).OID);
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297 | grouping_node_iterator++;
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298 | }
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299 |
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300 | // Get the format statement for this classifier if there is one, or use the browser's default otherwise
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301 | text_t formatstring;
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302 | text_t classifier_type = "HList";
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303 | browserclass *bptr = browsers->getbrowser (classifier_type);
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304 | ColInfoResponse_t *cinfo = recpt->get_collectinfo_ptr (collectproto, args["c"], logout);
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305 | if (!get_formatstring (args["dcl"], classifier_type, cinfo->format, formatstring))
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306 | {
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307 | formatstring = bptr->get_default_formatstring();
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308 | }
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309 | format_t *formatlistptr = new format_t();
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310 | text_tset metadata;
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311 | bool getParents = false;
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312 | parse_formatstring (formatstring, formatlistptr, metadata, getParents);
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313 | bool use_table = is_table_content (formatlistptr);
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314 |
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315 | // Display the grouping nodes
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316 | bptr->output_section_group (grouping_nodes_response, args, args["c"], 0, formatlistptr, use_table, metadata, getParents, collectproto, disp, outconvert, textout, logout);
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317 |
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318 | return selected_grouping_node_OID;
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319 | }
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320 |
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321 |
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322 | void dynamicclassifieraction::output_parent_classifier_nodes (text_t classifier_node_OID,
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323 | int& classifier_node_indent,
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324 | text_tmap classifier_options, cgiargsclass &args,
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325 | recptproto *collectproto, browsermapclass *browsers,
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326 | displayclass &disp, outconvertclass &outconvert,
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327 | ostream &textout, ostream &logout)
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328 | {
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329 | // Determine the parent classifier nodes
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330 | text_tarray parent_classifier_node_labels;
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331 | splitchar(classifier_node_OID.begin(), classifier_node_OID.end(), '|', parent_classifier_node_labels);
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332 | parent_classifier_node_labels.pop_back();
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333 |
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334 | // Display the parent classifier nodes
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335 | text_t parent_classifier_node_OID = "";
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336 | text_tarray::iterator parent_classifier_node_labels_iterator = parent_classifier_node_labels.begin();
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337 | while (parent_classifier_node_labels_iterator != parent_classifier_node_labels.end())
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338 | {
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339 | parent_classifier_node_OID += (parent_classifier_node_OID != "" ? "|" : "");
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340 | parent_classifier_node_OID += *parent_classifier_node_labels_iterator;
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341 | text_t parent_classifier_node_label = *parent_classifier_node_labels_iterator;
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342 | text_t parent_classifier_node_numleafdocs = "?"; // We can't determine this without more database requests
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343 | display_classifier_node (parent_classifier_node_OID, parent_classifier_node_label, parent_classifier_node_numleafdocs, classifier_node_indent, args, collectproto, browsers, disp, outconvert, textout, logout);
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344 | classifier_node_indent++;
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345 |
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346 | parent_classifier_node_labels_iterator++;
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347 | }
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348 | }
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349 |
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350 |
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351 | void dynamicclassifieraction::output_child_classifier_nodes (text_t classifier_node_OID,
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352 | text_t metadata_value_filter,
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353 | int& classifier_node_indent,
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354 | text_tmap classifier_options, cgiargsclass &args,
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355 | recptproto *collectproto, browsermapclass *browsers,
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356 | displayclass &disp, outconvertclass &outconvert,
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357 | ostream &textout, ostream &logout)
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358 | {
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359 | // Get all the metadata values for the specified element that match the filter
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360 | text_t metadata_element_name = classifier_options["metadata_element_name"];
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361 | FilterResponse_t metadata_values_response;
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362 | bool request_success = get_metadata_values (metadata_element_name, metadata_value_filter, "", args["c"], collectproto, metadata_values_response, logout);
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363 |
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364 | // If the request failed then it's probably because the collection isn't using an SQL infodbtype
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365 | if (request_success == false)
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366 | {
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367 | textout << outconvert << disp << "Error: Dynamic classifier functionality is not available. Please check you are using an SQL infodbtype and the collection has been rebuilt.\n";
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368 | return;
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369 | }
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370 |
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371 | // After processing any hierarchical metadata values we're left with the child classifer nodes
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372 | map<text_t, int, lttext_t> child_classifier_nodes;
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373 | text_t current_position = args["dcn"];
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374 | ResultDocInfo_tarray::iterator metadata_value_iterator = metadata_values_response.docInfo.begin();
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375 | while (metadata_value_iterator != metadata_values_response.docInfo.end())
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376 | {
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377 | text_t metadata_value = (*metadata_value_iterator).OID;
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378 |
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379 | // If we're not at the top-level we need to remove the current position from the metadata values
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380 | if (current_position != "" && starts_with(metadata_value, current_position + "|"))
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381 | {
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382 | metadata_value = substr(metadata_value.begin() + (current_position + "|").size(), metadata_value.end());
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383 | }
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384 |
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385 | // Is this metadata value hierarchical?
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386 | text_t::iterator hierarchy_split_position = findchar(metadata_value.begin(), metadata_value.end(), '|');
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387 | if (hierarchy_split_position != metadata_value.end())
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388 | {
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389 | // Yes, so use the first part of the hierarchy only
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390 | metadata_value = substr(metadata_value.begin(), hierarchy_split_position);
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391 | }
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392 |
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393 | // Create a node for this metadata value if we haven't seen it before
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394 | if (child_classifier_nodes.find(metadata_value) == child_classifier_nodes.end())
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395 | {
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396 | child_classifier_nodes[metadata_value] = 0;
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397 | }
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398 |
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399 | // Increment the occurrence count
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400 | child_classifier_nodes[metadata_value] += (*metadata_value_iterator).result_num;
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401 |
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402 | metadata_value_iterator++;
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403 | }
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404 |
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405 | // Display the child classifier nodes
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406 | map<text_t, int, lttext_t>::iterator child_classifier_nodes_iterator = child_classifier_nodes.begin();
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407 | while (child_classifier_nodes_iterator != child_classifier_nodes.end())
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408 | {
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409 | text_t child_classifier_node_OID = (*child_classifier_nodes_iterator).first;
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410 | if (classifier_node_OID != "")
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411 | {
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412 | child_classifier_node_OID = classifier_node_OID + "|" + child_classifier_node_OID;
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413 | }
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414 | text_t child_classifier_node_label = (*child_classifier_nodes_iterator).first;
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415 | int child_classifier_node_numleafdocs = (*child_classifier_nodes_iterator).second;
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416 | display_classifier_node (child_classifier_node_OID, child_classifier_node_label, child_classifier_node_numleafdocs, classifier_node_indent, args, collectproto, browsers, disp, outconvert, textout, logout);
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417 | child_classifier_nodes_iterator++;
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418 | }
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419 | }
|
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420 |
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421 |
|
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422 | void dynamicclassifieraction::display_classifier_node (text_t classifier_node_OID, text_t classifier_node_label,
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423 | text_t classifier_node_numleafdocs, int classifier_node_indent,
|
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424 | cgiargsclass &args, recptproto *collectproto,
|
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425 | browsermapclass *browsers, displayclass &disp,
|
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426 | outconvertclass &outconvert, ostream &textout,
|
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427 | ostream &logout)
|
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428 | {
|
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429 | // Generate the ResultDocInfo_t containing the information for the classifier node
|
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430 | ResultDocInfo_t classifier_node;
|
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431 | classifier_node.OID = classifier_node_OID;
|
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432 | classifier_node.metadata["doctype"].values.push_back ("classify");
|
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433 | classifier_node.metadata["haschildren"].values.push_back ("1");
|
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434 | classifier_node.metadata["numleafdocs"].values.push_back (classifier_node_numleafdocs);
|
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435 | classifier_node.metadata["Title"].values.push_back (classifier_node_label);
|
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436 |
|
---|
437 | // Get the format statement for this classifier if there is one, or use the browser's default otherwise
|
---|
438 | text_t formatstring;
|
---|
439 | text_t classifier_type = "VList";
|
---|
440 | browserclass *bptr = browsers->getbrowser (classifier_type);
|
---|
441 | ColInfoResponse_t *cinfo = recpt->get_collectinfo_ptr (collectproto, args["c"], logout);
|
---|
442 | if (!get_formatstring (args["dcl"], classifier_type, cinfo->format, formatstring))
|
---|
443 | {
|
---|
444 | formatstring = bptr->get_default_formatstring();
|
---|
445 | }
|
---|
446 | format_t *formatlistptr = new format_t();
|
---|
447 | text_tset metadata;
|
---|
448 | bool getParents = false;
|
---|
449 | parse_formatstring (formatstring, formatlistptr, metadata, getParents);
|
---|
450 | bool use_table = is_table_content (formatlistptr);
|
---|
451 |
|
---|
452 | // Display the classifier node
|
---|
453 | bptr->output_section_group (classifier_node, args, args["c"], classifier_node_indent, formatlistptr, use_table, metadata, getParents, collectproto, disp, outconvert, textout, logout);
|
---|
454 | }
|
---|
455 |
|
---|
456 |
|
---|
457 | void dynamicclassifieraction::display_document_nodes (FilterResponse_t documents_response, int document_nodes_indent,
|
---|
458 | cgiargsclass &args, recptproto *collectproto,
|
---|
459 | browsermapclass *browsers, displayclass &disp,
|
---|
460 | outconvertclass &outconvert, ostream &textout,
|
---|
461 | ostream &logout)
|
---|
462 | {
|
---|
463 | // Get the format statement for this classifier if there is one, or use the browser's default otherwise
|
---|
464 | text_t formatstring;
|
---|
465 | text_t classifier_type = "VList";
|
---|
466 | browserclass *bptr = browsers->getbrowser (classifier_type);
|
---|
467 | ColInfoResponse_t *cinfo = recpt->get_collectinfo_ptr (collectproto, args["c"], logout);
|
---|
468 | if (!get_formatstring (args["dcl"], classifier_type, cinfo->format, formatstring))
|
---|
469 | {
|
---|
470 | formatstring = bptr->get_default_formatstring();
|
---|
471 | }
|
---|
472 | format_t *formatlistptr = new format_t();
|
---|
473 | text_tset metadata;
|
---|
474 | bool getParents = false;
|
---|
475 | parse_formatstring (formatstring, formatlistptr, metadata, getParents);
|
---|
476 | bool use_table = is_table_content (formatlistptr);
|
---|
477 |
|
---|
478 | // Request the necessary metadata for displaying the documents
|
---|
479 | text_tarray document_OIDs;
|
---|
480 | ResultDocInfo_tarray::iterator document_iterator = documents_response.docInfo.begin();
|
---|
481 | while (document_iterator != documents_response.docInfo.end())
|
---|
482 | {
|
---|
483 | document_OIDs.push_back ((*document_iterator).OID);
|
---|
484 | document_iterator++;
|
---|
485 | }
|
---|
486 | FilterResponse_t document_nodes_response;
|
---|
487 | get_info (document_OIDs, args["c"], args["l"], metadata, getParents, collectproto, document_nodes_response, logout);
|
---|
488 |
|
---|
489 | // Display the document nodes
|
---|
490 | bptr->output_section_group (document_nodes_response, args, args["c"], document_nodes_indent, formatlistptr, use_table, metadata, getParents, collectproto, disp, outconvert, textout, logout);
|
---|
491 | }
|
---|