1 | /**********************************************************************
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2 | *
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3 | * source.cpp --
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4 | * Copyright (C) 1999 The New Zealand Digital Library Project
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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 "source.h"
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27 | #include "fileutil.h"
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28 | #include "OIDtools.h"
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29 | #include <assert.h>
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30 |
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31 |
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32 | sourceclass::sourceclass ()
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33 | {
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34 | db_ptr = NULL;
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35 | oaidb_ptr = NULL;
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36 | textsearchptr = NULL;
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37 | classname = "source";
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38 | }
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39 |
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40 | sourceclass::~sourceclass ()
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41 | {
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42 | if (db_ptr != NULL) delete db_ptr;
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43 | if (textsearchptr != NULL) delete textsearchptr;
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44 |
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45 | // http://stackoverflow.com/questions/677620/do-i-need-to-explicitly-call-the-base-virtual-destructor
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46 | // Answer: "No, destructors are called automatically [by the derived destructor] in the reverse
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47 | // order of construction. (Base classes last). Do not call base class destructors."
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48 | // The link also explains why the destructors should be declared as virtual in the header files.
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49 |
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50 | // now delete the oaidb object pointed to by the oaidb_ptr too
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51 | if (oaidb_ptr != NULL) delete oaidb_ptr;
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52 | oaidb_ptr = NULL;
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53 | }
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54 |
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55 | // configure should be called once for each configuration line
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56 | void sourceclass::configure (const text_t &key, const text_tarray &cfgline)
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57 | {
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58 | if (cfgline.size() >= 1) {
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59 | const text_t &value = cfgline[0];
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60 |
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61 | if (key == "collection") collection = value;
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62 | else if (key == "collectdir") collectdir = value;
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63 | else if (key == "gsdlhome") gsdlhome = value;
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64 | else if (key == "collecthome") collecthome = value;
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65 | else if (key == "gdbmhome") dbhome = value;
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66 | }
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67 |
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68 | if (key == "indexmap") {
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69 | indexmap.importmap (cfgline);
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70 |
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71 | } else if (key == "defaultindex") {
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72 | indexmap.from2to (cfgline[0], defaultindex);
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73 |
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74 | } else if (key == "subcollectionmap") {
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75 | subcollectionmap.importmap (cfgline);
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76 |
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77 | } else if (key == "defaultsubcollection") {
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78 | subcollectionmap.from2to (cfgline[0], defaultsubcollection);
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79 |
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80 | } else if (key == "languagemap") {
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81 | languagemap.importmap (cfgline);
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82 |
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83 | } else if (key == "defaultlanguage") {
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84 | languagemap.from2to (cfgline[0], defaultlanguage);
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85 | } else if (key == "indexstem") {
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86 | indexstem = cfgline[0];
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87 | }
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88 | }
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89 |
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90 | text_t sourceclass::getcollectionpath()
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91 | {
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92 | text_t resolved_filename;
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93 |
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94 | if (gsdlhome==dbhome) {
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95 | // dbhome has defaulted to gsdlhome which we take to means the
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96 | // database has been specifically moved out of gsdlhome area.
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97 | // => it should be whereever collecthome is set to
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98 | resolved_filename = filename_cat(collecthome, collection);
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99 | }
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100 | else {
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101 | // dbhome is explicitly set to something other than gsdlhome
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102 | // => use dbhome
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103 | resolved_filename = filename_cat(dbhome, "collect", collection);
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104 | }
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105 |
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106 | return resolved_filename;
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107 | }
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108 |
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109 | text_t sourceclass::resolve_db_filename(const text_t& idx,
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110 | const text_t& file_ext)
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111 | {
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112 | // This is an exact copy of the method (of the same name) in filterclass
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113 | // Makes sense to merge them, in which either gsdlhome, collecthome,
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114 | // dbhome, and collection need to also be passed in as parameters,
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115 | // or else there is some notion of a shared base class that both
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116 | // filter and source inherit from
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117 |
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118 | // NB: there is an even greater opportunity to share more code in this
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119 | // function if sql_db_ptr/db_ptr and db_filename and sql_db_filename
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120 | // are also drawn from one object
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121 |
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122 | /*
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123 | text_t resolved_filename;
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124 |
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125 | if (gsdlhome==dbhome) {
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126 | // dbhome has defaulted to gsdlhome which we take to means the
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127 | // database has been specifically moved out of gsdlhome area.
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128 | // => it should be whereever collecthome is set to
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129 |
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130 | resolved_filename = filename_cat(collecthome, collection, "index", "text", idx);
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131 | }
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132 | else {
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133 | // dbhome is explicitly set to something other than gsdlhome
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134 | // => use dbhome
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135 | resolved_filename = filename_cat(dbhome, "collect", collection, "index", "text", idx);
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136 | }
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137 | */
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138 |
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139 | text_t resolved_filename = filename_cat(getcollectionpath(), "index", "text", idx);
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140 | resolved_filename += file_ext;
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141 |
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142 | return resolved_filename;
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143 | }
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144 |
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145 | text_t sourceclass::resolve_oaidb_filename(const text_t& file_ext)
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146 | {
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147 | text_t resolved_filename = filename_cat(getcollectionpath(), "etc", "oai-inf");
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148 |
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149 | resolved_filename += file_ext;
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150 |
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151 | return resolved_filename;
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152 | }
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153 |
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154 | // init should be called after all the configuration is done but
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155 | // before any other methods are called
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156 | bool sourceclass::init (ostream &logout)
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157 | {
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158 | outconvertclass text_t2ascii;
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159 |
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160 | if (collecthome.empty()) collecthome = filename_cat(gsdlhome,"collect");
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161 | if (dbhome.empty()) dbhome = gsdlhome;
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162 |
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163 | if (defaultindex.empty()) {
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164 | // use first index in map as default if no default is set explicitly
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165 | text_tarray toarray;
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166 | indexmap.gettoarray(toarray);
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167 | if (toarray.size()) {
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168 | defaultindex = toarray[0];
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169 | }
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170 | }
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171 |
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172 | if (defaultsubcollection.empty()) {
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173 | // use first subcollection in map as default if no default is set explicitly
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174 | text_tarray toarray;
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175 | subcollectionmap.gettoarray(toarray);
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176 | if (toarray.size()) {
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177 | defaultsubcollection = toarray[0];
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178 | }
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179 | }
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180 |
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181 | if (defaultlanguage.empty()) {
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182 | // use first language in map as default if no default is set explicitly
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183 | text_tarray toarray;
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184 | languagemap.gettoarray(toarray);
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185 | if (toarray.size()) {
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186 | defaultlanguage = toarray[0];
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187 | }
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188 | }
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189 |
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190 | // get the collection directory name
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191 | if (collectdir.empty()) {
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192 | collectdir = filename_cat (collecthome, collection);
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193 | }
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194 |
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195 | if (db_ptr == NULL) {
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196 | // most likely a configuration problem
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197 | logout << text_t2ascii
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198 | << "configuration error: queryfilter contains a null dbclass\n\n";
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199 | return false;
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200 | }
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201 |
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202 | // get the filename for the database and make sure it exists
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203 | if (indexstem.empty()) {
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204 | indexstem = collection;
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205 | }
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206 | db_filename = resolve_db_filename(indexstem, db_ptr->getfileextension());
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207 | if (!file_exists(db_filename)) {
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208 | logout << text_t2ascii
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209 | << "warning: database \"" << db_filename << "\" does not exist\n\n";
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210 | // return false;
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211 | }
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212 |
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213 | oaidb_filename = resolve_oaidb_filename(oaidb_ptr->getfileextension());
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214 |
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215 | return true;
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216 | }
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217 |
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218 |
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219 | // translate_OID translates OIDs using ".pr", ."fc" etc.
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220 | bool sourceclass::translate_OID (const text_t &OIDin, text_t &OIDout,
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221 | comerror_t &err, ostream &logout)
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222 | {
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223 | outconvertclass text_t2ascii;
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224 |
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225 | err = noError;
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226 | if (db_ptr == NULL) {
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227 | // most likely a configuration problem
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228 | logout << text_t2ascii
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229 | << "configuration error: " << classname << " contains a null dbclass\n\n";
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230 | err = configurationError;
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231 | return true;
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232 | }
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233 |
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234 | // open the database
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235 | db_ptr->setlogout(&logout);
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236 | if (!db_ptr->opendatabase (db_filename, DB_READER, 100, false)) {
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237 | // most likely a system problem (we have already checked that the database exists)
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238 | logout << text_t2ascii
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239 | << "system problem: open on database \"" << db_filename << "\" failed\n\n";
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240 | err = systemProblem;
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241 | return true;
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242 | }
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243 |
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244 | infodbclass info;
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245 | OIDout = db_ptr->translate_OID (OIDin, info);
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246 | db_ptr->closedatabase(); // Important that local library doesn't leave any files open
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247 | return true;
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248 | }
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249 |
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250 | // get_oai_metadata fills out the oai metadata from oaidb if possible
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251 | // if it is not responsible for the given OID then it will return false.
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252 | bool sourceclass::get_oai_metadata (const text_t &requestParams, const text_t &refParams,
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253 | bool getParents, const text_tset &fields,
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254 | const text_t &OID, text_t &deleted_status, MetadataInfo_tmap &metadata,
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255 | comerror_t &err, ostream &logout)
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256 | {
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257 | outconvertclass text_t2ascii;
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258 | metadata.erase(metadata.begin(), metadata.end());
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259 | err = noError;
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260 |
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261 | //logout << text_t2ascii << "sourceclass::get_oai_meta for OID: " << OID << "\n";
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262 |
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263 | // ONLY if we're doing any OAI stuff (FROAI will be set then) will we even be in here
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264 | // So next try to open the oai-inf db if it exists for this collection
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265 | if (!file_exists(oaidb_filename)) { // if the oaidb file doesn't even exist, let's not bother with oaidb
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266 |
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267 | logout << text_t2ascii
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268 | << "warning: collection's oai-inf database \"" << oaidb_filename << "\" does not exist\n\n";
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269 | return false;
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270 |
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271 | } else { // let's try opening the oaidb file
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272 | oaidb_ptr->setlogout(&logout);
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273 | if (!oaidb_ptr->opendatabase (oaidb_filename, DB_READER, 100, false)) {
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274 | // most likely a system problem (we have already checked that the database exists just above)
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275 | logout << text_t2ascii
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276 | << "system problem: open on database \""
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277 | << oaidb_filename << "\" failed\n\n";
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278 | err = systemProblem;
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279 | return false;
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280 | } // now we've opened the oai-inf db file successfully
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281 | }
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282 |
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283 | // get the metadata (deleted status, timestamp, datestamp) for OID, and pushback onto the metadata array
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284 | infodbclass oai_info;
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285 | if (!oaidb_ptr->getinfo(OID, oai_info)) { // OID not found in oai_inf db
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286 | logout << text_t2ascii
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287 | << "warning: lookup for OID \"" << OID
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288 | << "\" in etc/oai-inf db failed when getting metadata (in sourceclass source.cpp).\n\n";
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289 |
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290 | return false;
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291 | } else {
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292 | //logout << text_t2ascii << "@@@@ getting metadata for OID \"" << OID << "\" from etc/oai-inf db.\n\n";
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293 | //logout << text_t2ascii << "@@@@ timestamp: " << oai_info["timestamp"] << "\n\n";
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294 |
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295 | metadata["oaiinf.status"].isRef = false;
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296 | metadata["oaiinf.status"].values.push_back(oai_info["status"]);
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297 | metadata["oaiinf.timestamp"].isRef = false;
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298 | metadata["oaiinf.timestamp"].values.push_back(oai_info["timestamp"]);
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299 | metadata["oaiinf.datestamp"].isRef = false;
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300 | metadata["oaiinf.datestamp"].values.push_back(oai_info["datestamp"]);
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301 | }
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302 |
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303 | // we're done with oai-inf db
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304 |
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305 | oaidb_ptr->closedatabase(); // don't leave files open
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306 |
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307 | return true;
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308 | }
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309 |
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310 |
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311 | // get_metadata fills out the metadata if possible, if it is not responsible
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312 | // for the given OID then it will return false.
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313 | bool sourceclass::get_metadata (const text_t &requestParams, const text_t &refParams,
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314 | bool getParents, const text_tset &fields,
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315 | const text_t &OID, MetadataInfo_tmap &metadata,
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316 | comerror_t &err, ostream &logout, bool append)
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317 | {
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318 | outconvertclass text_t2ascii;
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319 |
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320 | if(!append) {
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321 | metadata.erase(metadata.begin(), metadata.end());
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322 | }
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323 |
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324 | err = noError;
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325 | if (db_ptr == NULL) {
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326 | // most likely a configuration problem
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327 | logout << text_t2ascii
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328 | << "configuration error: " << classname <<" contains a null dbclass\n\n";
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329 | err = configurationError;
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330 | return true;
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331 | }
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332 |
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333 | // open the database
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334 | db_ptr->setlogout(&logout);
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335 | if (!db_ptr->opendatabase (db_filename, DB_READER, 100, false)) {
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336 | // most likely a system problem (we have already checked that the database exists)
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337 | logout << text_t2ascii
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338 | << "system problem: open on database \"" << db_filename << "\" failed\n\n";
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339 | err = systemProblem;
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340 | return true;
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341 | }
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342 |
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343 | // get the metadata - if getParents is set we need to get
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344 | // info for all parents of OID as well as OID
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345 | vector<infodbclass> info_array;
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346 | text_tarray OIDs;
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347 | if (getParents) get_parents_array (OID, OIDs);
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348 | OIDs.push_back (OID);
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349 |
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350 | text_tarray::const_iterator this_OID = OIDs.begin();
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351 | text_tarray::const_iterator end_OID = OIDs.end();
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352 |
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353 | while (this_OID != end_OID) {
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354 | infodbclass info;
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355 | if (!db_ptr->getinfo(*this_OID, info)) return false;
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356 |
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357 | // adjust the metadata
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358 | text_t &contains = info["contains"];
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359 | if (contains.empty()) info["haschildren"] = 0;
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360 | else info["haschildren"] = 1;
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361 | //contains.clear();
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362 |
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363 | info_array.push_back(info);
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364 | ++this_OID;
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365 | }
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366 |
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367 | // if fields set is empty we want to get all available metadata
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368 | text_tset tfields = fields;
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369 | if (tfields.empty() && !info_array.empty()) {
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370 | infodbclass::iterator t_info = info_array[0].begin();
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371 | infodbclass::iterator e_info = info_array[0].end();
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372 | while (t_info != e_info) {
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373 | if ((*t_info).first != "contains")
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374 | tfields.insert ((*t_info).first);
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375 | ++t_info;
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376 | }
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377 | tfields.insert ("hasnext");
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378 | tfields.insert ("hasprevious");
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379 | }
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380 |
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381 | // collect together the metadata
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382 | bool donenextprevtest = false;
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383 | bool hasnext=false, hasprevious=false;
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384 | MetadataInfo_t this_metadata;
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385 | text_tarray *pos_metadata;
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386 | text_tset::const_iterator fields_here = tfields.begin();
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387 | text_tset::const_iterator fields_end = tfields.end();
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388 |
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389 | while (fields_here != fields_end) {
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390 | this_metadata.clear();
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391 | this_metadata.isRef = false;
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392 |
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393 | vector<infodbclass>::reverse_iterator this_info = info_array.rbegin();
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394 | vector<infodbclass>::reverse_iterator end_info = info_array.rend();
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395 | MetadataInfo_t *tmetaptr = &this_metadata;
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396 | while (this_info != end_info) {
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397 |
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398 | pos_metadata = (*this_info).getmultinfo(*fields_here);
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399 | if ((*fields_here == "hasnext" || *fields_here == "hasprevious")) {
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400 |
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401 | // collect metadata
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402 | if (!donenextprevtest) {
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403 | donenextprevtest = true;
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404 |
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405 | // cache parent contents array
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406 | text_t thisparent = get_parent (OID);
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407 | if (!thisparent.empty()) {
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408 | if (thisparent != parentOID) {
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409 | parentOID = thisparent;
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410 | parentcontents.erase(parentcontents.begin(), parentcontents.end());
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411 | if (db_ptr->getinfo(parentOID, parentinfo)) {
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412 | text_t &parentinfocontains = parentinfo["contains"];
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413 | if (!parentinfocontains.empty())
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414 | splitchar (parentinfocontains.begin(), parentinfocontains.end(),
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415 | ';', parentcontents);
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416 | }
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417 | }
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418 |
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419 | // do tests
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420 | text_tarray::const_iterator parentcontents_here = parentcontents.begin();
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421 | text_tarray::const_iterator parentcontents_end = parentcontents.end();
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422 | text_t shrunk_OID = OID;
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423 | shrink_parent (shrunk_OID);
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424 | while (parentcontents_here != parentcontents_end) {
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425 | if (*parentcontents_here == shrunk_OID) {
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426 | if (parentcontents_here == parentcontents.begin()) hasprevious = false;
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427 | else hasprevious = true;
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428 |
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429 | ++parentcontents_here;
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430 |
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431 | if (parentcontents_here == parentcontents.end()) hasnext = false;
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432 | else hasnext = true;
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433 |
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434 | break;
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435 | }
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436 |
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437 | ++parentcontents_here;
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438 | }
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439 |
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440 | // fill in metadata
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---|
441 | if ((*fields_here == "hasnext" && hasnext) ||
|
---|
442 | (*fields_here == "hasprevious" && hasprevious))
|
---|
443 | tmetaptr->values.push_back("1");
|
---|
444 | else
|
---|
445 | tmetaptr->values.push_back("0");
|
---|
446 | } else
|
---|
447 | tmetaptr->values.push_back("0");
|
---|
448 | }
|
---|
449 | }
|
---|
450 | //else if (pos_metadata != NULL && *fields_here != "contains") {
|
---|
451 | else if (pos_metadata != NULL) {
|
---|
452 | tmetaptr->values = *pos_metadata;
|
---|
453 | }
|
---|
454 | else
|
---|
455 | tmetaptr->values.push_back("");
|
---|
456 |
|
---|
457 | ++this_info;
|
---|
458 | if (this_info != end_info) {
|
---|
459 | tmetaptr->parent = new MetadataInfo_t();
|
---|
460 | tmetaptr = tmetaptr->parent;
|
---|
461 | }
|
---|
462 | }
|
---|
463 | metadata[*fields_here] = this_metadata;
|
---|
464 | ++fields_here;
|
---|
465 | }
|
---|
466 |
|
---|
467 | db_ptr->closedatabase(); // Important that local library doesn't leave any files open
|
---|
468 | return true;
|
---|
469 | }
|
---|
470 |
|
---|
471 | bool sourceclass::get_document (const text_t &OID, text_t &doc,
|
---|
472 | comerror_t &err, ostream &logout)
|
---|
473 | {
|
---|
474 | outconvertclass text_t2ascii;
|
---|
475 |
|
---|
476 | err = noError;
|
---|
477 | if (db_ptr == NULL) {
|
---|
478 | // most likely a configuration problem
|
---|
479 | logout << text_t2ascii
|
---|
480 | << "configuration error: " << classname << " contains a null dbclass\n\n";
|
---|
481 | err = configurationError;
|
---|
482 | return true;
|
---|
483 | }
|
---|
484 |
|
---|
485 | // open the database
|
---|
486 | db_ptr->setlogout(&logout);
|
---|
487 | if (!db_ptr->opendatabase (db_filename, DB_READER, 100, false)) {
|
---|
488 | // most likely a system problem (we have already checked that the database exists)
|
---|
489 | logout << text_t2ascii
|
---|
490 | << "system problem: open on database \"" << db_filename << "\" failed\n\n";
|
---|
491 | err = systemProblem;
|
---|
492 | return true;
|
---|
493 | }
|
---|
494 |
|
---|
495 | text_t tOID = OID;
|
---|
496 | if (needs_translating (OID))
|
---|
497 | translate_OID (OID, tOID, err, logout);
|
---|
498 | infodbclass info;
|
---|
499 | if (!db_ptr->getinfo(tOID, info)) {
|
---|
500 | db_ptr->closedatabase(); // Important that local library doesn't leave any files open
|
---|
501 | return false;
|
---|
502 | }
|
---|
503 |
|
---|
504 | if (info["hastxt"].getint() == 1) {
|
---|
505 | int docnum = info["docnum"].getint();
|
---|
506 |
|
---|
507 | // set the collection directory
|
---|
508 | textsearchptr->setcollectdir (collectdir);
|
---|
509 |
|
---|
510 | // get the text
|
---|
511 | textsearchptr->docTargetDocument(defaultindex, defaultsubcollection,
|
---|
512 | defaultlanguage, collection, docnum, doc);
|
---|
513 |
|
---|
514 | // remove the <Doc></Doc> and <Sec></Sec> tags
|
---|
515 | doc.replace("<Doc>", "");
|
---|
516 | doc.replace("</Doc>", "");
|
---|
517 | doc.replace("<Sec>", "");
|
---|
518 | doc.replace("</Sec>", "");
|
---|
519 | }
|
---|
520 |
|
---|
521 | db_ptr->closedatabase(); // Important that local library doesn't leave any files open
|
---|
522 | return true;
|
---|
523 | }
|
---|
524 |
|
---|
525 | bool sourceclass::is_searchable(bool &issearchable, comerror_t &err, ostream &logout)
|
---|
526 | {
|
---|
527 | err = noError;
|
---|
528 | issearchable = false;
|
---|
529 |
|
---|
530 | text_tarray fromarray;
|
---|
531 | indexmap.getfromarray(fromarray);
|
---|
532 | if (fromarray.size() == 0) {
|
---|
533 | return true;
|
---|
534 | } else if (fromarray.size() == 1) {
|
---|
535 | if (fromarray[0] == "dummy:text") {
|
---|
536 | // always return true - issearchable is false here though
|
---|
537 | return true;
|
---|
538 | }
|
---|
539 | }
|
---|
540 | issearchable = true;
|
---|
541 | return true;
|
---|
542 | }
|
---|
543 |
|
---|
544 |
|
---|
545 | bool operator==(const sourceptr &x, const sourceptr &y) {
|
---|
546 | return (x.s == y.s);
|
---|
547 | }
|
---|
548 |
|
---|
549 | bool operator<(const sourceptr &x, const sourceptr &y) {
|
---|
550 | return (x.s < y.s);
|
---|
551 | }
|
---|
552 |
|
---|
553 |
|
---|
554 | // thesource remains the property of the calling code but
|
---|
555 | // should not be deleted until it is removed from this list.
|
---|
556 | void sourcelistclass::addsource (sourceclass *thesource) {
|
---|
557 | // can't add a source that doesn't exist
|
---|
558 | assert (thesource != NULL);
|
---|
559 | if (thesource == NULL) return;
|
---|
560 |
|
---|
561 | sourceptr sp;
|
---|
562 | sp.s = thesource;
|
---|
563 |
|
---|
564 | sourceptrs.push_back(sp);
|
---|
565 | }
|
---|