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
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161 | if (args["dcn"].empty())
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162 | {
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163 | // Simple case for the top-level page
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164 | output_top_level_page (classifier_options, args, collectproto, browsers, disp, outconvert, textout, logout);
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165 | }
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166 | else
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167 | {
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168 | // More complex case for an internal page
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169 | output_internal_page (classifier_options, args, collectproto, browsers, disp, outconvert, textout, logout);
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170 | }
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171 |
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172 | // Output the "<ID>Footer" format statement if there is one
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173 | text_t classifier_footer_format_statement = "";
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174 | get_formatstring (arg_dcl + "Footer", cinfo->format, classifier_footer_format_statement);
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175 | textout << outconvert << disp << classifier_footer_format_statement << "\n";
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176 |
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177 | textout << outconvert << disp << "_dynamicclassifier:footer_\n";
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178 | return true;
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179 | }
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180 |
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181 |
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182 | text_tmap dynamicclassifieraction::parse_classifier_options (text_t classifier_specification, cgiargsclass &args)
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183 | {
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184 | text_tmap classifier_options;
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185 | classifier_options["current_position"] = args["dcn"];
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186 |
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187 | // Split the classifier specification string by spaces
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188 | text_tlist classifier_specification_parts;
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189 | splitchar (classifier_specification.begin(), classifier_specification.end(), ' ', classifier_specification_parts);
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190 |
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191 | // The metadata element to classify by should be the first value
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192 | classifier_options["metadata_element_name"] = classifier_specification_parts.front();
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193 | classifier_specification_parts.pop_front();
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194 |
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195 | // Parse options from the remainder of the classifier specification
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196 | while (!classifier_specification_parts.empty())
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197 | {
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198 | // Parse the option name
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199 | text_t classifier_option_name = classifier_specification_parts.front();
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200 | classifier_specification_parts.pop_front();
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201 |
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202 | // 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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203 | text_t classifier_option_value = "1";
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204 | if (!classifier_specification_parts.empty() && !starts_with(classifier_specification_parts.front(), "-"))
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205 | {
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206 | classifier_option_value = classifier_specification_parts.front();
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207 | classifier_specification_parts.pop_front();
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208 | }
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209 |
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210 | // Record the option
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211 | classifier_options[classifier_option_name] = classifier_option_value;
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212 | }
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213 |
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214 | return classifier_options;
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215 | }
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216 |
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217 |
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218 | void dynamicclassifieraction::output_top_level_page (text_tmap classifier_options, cgiargsclass &args,
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219 | recptproto *collectproto, browsermapclass *browsers,
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220 | displayclass &disp, outconvertclass &outconvert,
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221 | ostream &textout, ostream &logout)
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222 | {
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223 | // Get all the metadata values for the specified element (these become the classifier nodes at the top level)
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224 | text_t metadata_element_name = classifier_options["metadata_element_name"];
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225 | FilterResponse_t metadata_values_response;
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226 | bool request_success = get_metadata_values (metadata_element_name, "", args["c"], collectproto, metadata_values_response, logout);
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227 |
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228 | // If the request failed then it's probably because the collection isn't using an SQL infodbtype
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229 | if (request_success == false)
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230 | {
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231 | 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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232 | return;
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233 | }
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234 |
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235 | // After processing any hierarchical metadata values, we're left with the top-level classifer nodes
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236 | map<text_t, int, lttext_t> classifier_nodes = process_metadata_values (classifier_options, metadata_values_response.docInfo);
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237 |
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238 | // Display the top-level classifier nodes
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239 | map<text_t, int, lttext_t>::iterator classifier_nodes_iterator = classifier_nodes.begin();
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240 | while (classifier_nodes_iterator != classifier_nodes.end())
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241 | {
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242 | text_t classifier_node_OID = (*classifier_nodes_iterator).first;
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243 | text_t classifier_node_label = (*classifier_nodes_iterator).first;
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244 | int classifier_node_numleafdocs = (*classifier_nodes_iterator).second;
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245 | output_classifier_node (classifier_node_OID, classifier_node_label, classifier_node_numleafdocs, 0, args, collectproto, browsers, disp, outconvert, textout, logout);
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246 | classifier_nodes_iterator++;
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247 | }
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248 | }
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249 |
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250 |
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251 | void dynamicclassifieraction::output_internal_page (text_tmap classifier_options, cgiargsclass &args,
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252 | recptproto *collectproto, browsermapclass *browsers,
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253 | displayclass &disp, outconvertclass &outconvert,
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254 | ostream &textout, ostream &logout)
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255 | {
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256 | text_t classifier_node_OID = classifier_options["current_position"];
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257 | text_t classifier_node_metadata_value = classifier_options["current_position"];
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258 | int node_indent = 0;
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259 |
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260 | // Get all the classifier nodes at this level
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261 | text_t metadata_element_name = classifier_options["metadata_element_name"];
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262 | text_t metadata_value_filter = classifier_node_metadata_value + "|*";
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263 | FilterResponse_t metadata_values_response;
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264 | bool request_success = get_metadata_values (metadata_element_name, metadata_value_filter, args["c"], collectproto, metadata_values_response, logout);
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265 |
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266 | // If the request failed then it's probably because the collection isn't using an SQL infodbtype
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267 | if (request_success == false)
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268 | {
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269 | 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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270 | return;
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271 | }
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272 |
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273 | // Get all the documents at this level
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274 | text_t sort_documents_by = "";
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275 | if (classifier_options.find("-sort_documents_by") != classifier_options.end())
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276 | {
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277 | sort_documents_by = classifier_options["-sort_documents_by"];
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278 | }
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279 | FilterResponse_t documents_response;
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280 | 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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281 |
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282 | // If there are no classifier nodes or documents at this level then the classifier node value is invalid
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283 | if (metadata_values_response.docInfo.empty() && documents_response.docInfo.empty())
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284 | {
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285 | textout << outconvert << disp << "Error: Invalid classifier node \"" << classifier_node_OID << "\".\n";
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286 | return;
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287 | }
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288 |
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289 | // Determine the parent classifier nodes
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290 | text_tarray parent_classifier_node_labels;
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291 | splitchar(classifier_node_OID.begin(), classifier_node_OID.end(), '|', parent_classifier_node_labels);
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292 | text_t classifier_node_label = parent_classifier_node_labels.back();
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293 | parent_classifier_node_labels.pop_back();
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294 |
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295 | // Display the parent classifier nodes
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296 | text_t parent_classifier_node_OID = "";
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297 | text_tarray::iterator parent_classifier_node_labels_iterator = parent_classifier_node_labels.begin();
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298 | while (parent_classifier_node_labels_iterator != parent_classifier_node_labels.end())
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299 | {
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300 | parent_classifier_node_OID += (parent_classifier_node_OID != "" ? "|" : "");
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301 | parent_classifier_node_OID += *parent_classifier_node_labels_iterator;
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302 | text_t parent_classifier_node_label = *parent_classifier_node_labels_iterator;
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303 | text_t parent_classifier_node_numleafdocs = "?"; // We can't determine this without more database requests
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304 | output_classifier_node (parent_classifier_node_OID, parent_classifier_node_label, parent_classifier_node_numleafdocs, node_indent, args, collectproto, browsers, disp, outconvert, textout, logout);
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305 | node_indent++;
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306 |
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307 | parent_classifier_node_labels_iterator++;
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308 | }
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309 |
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310 | // Display the selected classifier node
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311 | int classifier_node_numleafdocs = metadata_values_response.docInfo.size() + documents_response.docInfo.size();
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312 | output_classifier_node (classifier_node_OID, classifier_node_label, classifier_node_numleafdocs, node_indent, args, collectproto, browsers, disp, outconvert, textout, logout);
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313 | node_indent++;
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314 |
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315 | // After processing any hierarchical metadata values, we're left with the child classifer nodes
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316 | map<text_t, int, lttext_t> child_classifier_nodes = process_metadata_values (classifier_options, metadata_values_response.docInfo);
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317 |
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318 | // Display the child classifier nodes
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319 | map<text_t, int, lttext_t>::iterator child_classifier_nodes_iterator = child_classifier_nodes.begin();
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320 | while (child_classifier_nodes_iterator != child_classifier_nodes.end())
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321 | {
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322 | text_t child_classifier_node_OID = classifier_node_OID + "|" + (*child_classifier_nodes_iterator).first;
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323 | text_t child_classifier_node_label = (*child_classifier_nodes_iterator).first;
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324 | int child_classifier_node_numleafdocs = (*child_classifier_nodes_iterator).second;
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325 | output_classifier_node (child_classifier_node_OID, child_classifier_node_label, child_classifier_node_numleafdocs, node_indent, args, collectproto, browsers, disp, outconvert, textout, logout);
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326 | child_classifier_nodes_iterator++;
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327 | }
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328 |
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329 | // Display the documents at this level
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330 | output_document_nodes (documents_response, node_indent, args, collectproto, browsers, disp, outconvert, textout, logout);
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331 | }
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332 |
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333 |
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334 | map<text_t, int, lttext_t> dynamicclassifieraction::process_metadata_values (text_tmap classifier_options,
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335 | ResultDocInfo_tarray metadata_values)
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336 | {
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337 | map<text_t, int, lttext_t> metadata_values_grouped;
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338 |
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339 | text_t current_position = classifier_options["current_position"];
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340 | ResultDocInfo_tarray::iterator metadata_value_iterator = metadata_values.begin();
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341 | while (metadata_value_iterator != metadata_values.end())
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342 | {
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343 | text_t metadata_value = (*metadata_value_iterator).OID;
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344 |
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345 | // If we're not at the top-level we need to remove the current position from the metadata values
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346 | if (current_position != "" && starts_with(metadata_value, current_position + "|"))
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347 | {
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348 | metadata_value = substr(metadata_value.begin() + (current_position + "|").size(), metadata_value.end());
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349 | }
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350 |
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351 | // Is this metadata value hierarchical?
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352 | text_t::iterator hierarchy_split_position = findchar(metadata_value.begin(), metadata_value.end(), '|');
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353 | if (hierarchy_split_position != metadata_value.end())
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354 | {
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355 | // Yes, so use the first part of the hierarchy only
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356 | metadata_value = substr(metadata_value.begin(), hierarchy_split_position);
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357 | }
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358 |
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359 | // Create a node for this metadata value if we haven't seen it before
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360 | if (metadata_values_grouped.find(metadata_value) == metadata_values_grouped.end())
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361 | {
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362 | metadata_values_grouped[metadata_value] = 0;
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363 | }
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364 |
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365 | // Increment the occurrence count
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366 | metadata_values_grouped[metadata_value] += (*metadata_value_iterator).result_num;
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367 |
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368 | metadata_value_iterator++;
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369 | }
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370 |
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371 | return metadata_values_grouped;
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372 | }
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373 |
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374 |
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375 | void dynamicclassifieraction::output_classifier_node (text_t classifier_node_OID, text_t classifier_node_label,
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376 | text_t classifier_node_numleafdocs, int classifier_node_indent,
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377 | cgiargsclass &args, recptproto *collectproto,
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378 | browsermapclass *browsers, displayclass &disp,
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379 | outconvertclass &outconvert, ostream &textout,
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380 | ostream &logout)
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381 | {
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382 | // Generate the ResultDocInfo_t containing the information for the classifier node
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383 | ResultDocInfo_t classifier_node;
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384 | classifier_node.OID = classifier_node_OID;
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385 | classifier_node.metadata["doctype"].values.push_back ("classify");
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386 | classifier_node.metadata["haschildren"].values.push_back ("1");
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387 | classifier_node.metadata["numleafdocs"].values.push_back (classifier_node_numleafdocs);
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388 | classifier_node.metadata["Title"].values.push_back (classifier_node_label);
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389 |
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390 | // Get the format statement for this classifier if there is one, or use the browser's default otherwise
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391 | text_t formatstring;
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392 | text_t classifier_type = "VList";
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393 | browserclass *bptr = browsers->getbrowser (classifier_type);
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394 | ColInfoResponse_t *cinfo = recpt->get_collectinfo_ptr (collectproto, args["c"], logout);
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395 | if (!get_formatstring (args["dcl"], classifier_type, cinfo->format, formatstring))
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396 | {
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397 | formatstring = bptr->get_default_formatstring();
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398 | }
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399 | format_t *formatlistptr = new format_t();
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400 | text_tset metadata;
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401 | bool getParents = false;
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402 | parse_formatstring (formatstring, formatlistptr, metadata, getParents);
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403 | bool use_table = is_table_content (formatlistptr);
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404 |
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405 | // Display the classifier node
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406 | bptr->output_section_group (classifier_node, args, args["c"], classifier_node_indent, formatlistptr, use_table, metadata, getParents, collectproto, disp, outconvert, textout, logout);
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407 | }
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408 |
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409 |
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410 | void dynamicclassifieraction::output_document_nodes (FilterResponse_t documents_response, int document_nodes_indent,
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411 | cgiargsclass &args, recptproto *collectproto,
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412 | browsermapclass *browsers, displayclass &disp,
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413 | outconvertclass &outconvert, ostream &textout,
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414 | ostream &logout)
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415 | {
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416 | // Get the format statement for this classifier if there is one, or use the browser's default otherwise
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417 | text_t formatstring;
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418 | text_t classifier_type = "VList";
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419 | browserclass *bptr = browsers->getbrowser (classifier_type);
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420 | ColInfoResponse_t *cinfo = recpt->get_collectinfo_ptr (collectproto, args["c"], logout);
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421 | if (!get_formatstring (args["dcl"], classifier_type, cinfo->format, formatstring))
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422 | {
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423 | formatstring = bptr->get_default_formatstring();
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424 | }
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425 | format_t *formatlistptr = new format_t();
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426 | text_tset metadata;
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427 | bool getParents = false;
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428 | parse_formatstring (formatstring, formatlistptr, metadata, getParents);
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429 | bool use_table = is_table_content (formatlistptr);
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430 |
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431 | // Request the necessary metadata for displaying the documents
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432 | text_tarray document_OIDs;
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433 | ResultDocInfo_tarray::iterator document_iterator = documents_response.docInfo.begin();
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434 | while (document_iterator != documents_response.docInfo.end())
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435 | {
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436 | document_OIDs.push_back ((*document_iterator).OID);
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437 | document_iterator++;
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438 | }
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439 | FilterResponse_t document_nodes_response;
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440 | get_info (document_OIDs, args["c"], args["l"], metadata, getParents, collectproto, document_nodes_response, logout);
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441 |
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442 | // Display the document nodes
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443 | bptr->output_section_group (document_nodes_response, args, args["c"], document_nodes_indent, formatlistptr, use_table, metadata, getParents, collectproto, disp, outconvert, textout, logout);
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444 | }
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