1 | #include "oaiconfig.h"
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2 |
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3 | #include <algorithm>
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4 | #include <iostream>
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5 |
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6 | #include "fileutil.h"
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7 |
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8 | /**
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9 | * The mapping works as follows in the oai.cfg or collect.cfg file.
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10 | *
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11 | * A line is in the format oaimapping <collection field> <oai field>
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12 | *
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13 | * The map here is used to look up the "Greenstone" name which is mapped from
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14 | * a given OAI field name, the reverse direction to that given in the
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15 | * Greenstone collect.cfg file. The oairecordaction class instance which
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16 | * produces output for an OAI record information request thus uses the map
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17 | * to work from the field in the collection it has on hand which OAI
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18 | * record name it should use instead.
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19 | *
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20 | * An extension is to be used for this in which the OAI field name in the
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21 | * collect.cfg file can be made specific for a particular record format.
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22 | * This is done using the OAI field name in the format of
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23 | * <OAI format>.<OAI field name>
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24 | * Thus, an rfc1807 Title field would be referred to as rfc1807.Title
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25 | *
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26 | * A collection-level mapping can be provided in oai.cfg by prepending
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27 | * collname to collection field:
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28 | * <collname:field> <oai field>
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29 |
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30 | * In the absence of a particular format name, the mapping is taken to be
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31 | * universal.
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32 | */
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33 |
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34 | oaiconfig::oaiconfig() : configurable () {
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35 | this->resumptionSize = -1; // Default = do not use resumption tokens
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36 | }
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37 |
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38 | oaiconfig::oaiconfig(text_t &gsdlhome, text_t &gsdlcollect)
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39 | {
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40 | // read main configuration file (oai.cfg) to get oai collections
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41 | text_t mainconfig = filename_cat(gsdlhome, "etc", "oai.cfg");
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42 | this->collection = "";
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43 | this->resumptionSize = -1;
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44 | this->read_configfile(mainconfig);
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45 |
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46 | // then if we've not got a specified collection in the gsdlcollect
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47 | // parameter, read in all the collection's individual configurations
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48 | if (gsdlcollect == "") {
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49 | text_tarray::iterator here = this->collectList.begin();
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50 | text_tarray::iterator end = this->collectList.end();
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51 | while (here != end) {
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52 | this->configureCollection(gsdlhome, *here);
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53 | ++here;
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54 | }
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55 | }
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56 | else {
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57 | this->configureCollection(gsdlhome, gsdlcollect);
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58 | }
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59 | }
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60 |
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61 | oaiconfig::~oaiconfig()
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62 | {
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63 | oaicollectmap::iterator here = this->collectMap.begin();
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64 | oaicollectmap::iterator end = this->collectMap.end();
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65 | while (here != end) {
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66 | delete here->second;
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67 | ++here;
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68 | }
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69 | }
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70 |
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71 | int oaiconfig::resumeAfter()
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72 | { return this->resumptionSize;
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73 | }
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74 |
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75 | int oaiconfig::getOAIVersion()
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76 | {
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77 | if (this->oaiVersion == "1.1") {
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78 | return 110;
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79 | }
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80 | return 200;
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81 | }
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82 |
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83 | void oaiconfig::configureCollection(const text_t &gsdlhome, const text_t &gsdlcollect)
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84 | {
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85 | text_t cnfgfile = filename_cat(gsdlhome, "collect", gsdlcollect, "etc", "collect.cfg");
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86 | this->collection = gsdlcollect;
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87 | this->read_configfile(cnfgfile);
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88 | }
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89 |
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90 | void oaiconfig::configure (const text_t &key, const text_tarray &cfgline)
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91 | {
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92 | // we've got an oai mapping item, and at least two fields
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93 | if (key == "oaimapping" && cfgline.size() > 1) {
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94 | text_t::const_iterator colonAt;
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95 | text_t index, name, configCollection;
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96 |
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97 | // Take a default collection as being whatever the collection being configured is...
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98 | configCollection = this->collection;
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99 |
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100 | // get the name of the (collection) field to map; this may actually
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101 | // be in a colon separated format of the type
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102 | // <collection name>:<field name>
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103 | index = cfgline[0];
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104 | if ((colonAt = find(index.begin(), index.end(), ':')) != index.end()) {
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105 | configCollection = substr(index.begin(), colonAt);
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106 |
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107 | if (this->collection != "" && configCollection != this->collection) {
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108 | cerr << "Attempt to configure OAI mappings for " << configCollection << " in " << this->collection << endl;
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109 | }
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110 |
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111 | colonAt += 1;
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112 | index = substr(colonAt, index.end());
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113 | }
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114 |
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115 | // the second parameter is the metadata field to map the collection
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116 | // field onto. It may be provided with a metadata protocol (which
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117 | // will be given first and separated by a period or full stop). In
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118 | // the case of format.field name, the splitting is done here.
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119 | if ((colonAt = find(cfgline[1].begin(), cfgline[1].end(), '.')) != cfgline[1].end()) {
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120 | text_t stub = substr(cfgline[1].begin(), colonAt);
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121 | colonAt += 1;
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122 | name = substr(colonAt, cfgline[1].end());
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123 | index.append(":");
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124 | index.append(stub);
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125 | }
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126 | else {
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127 | name = cfgline[1];
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128 | }
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129 |
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130 | // now 'index' is in the form <collectionfield>:(formatname)
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131 | // 'name' is simply the fieldname within the format
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132 | // 'configCollection' is the collection to be configured
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133 |
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134 | // now simply map the field name (index) onto the collection name (name)
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135 | if (this->collectMap[configCollection] == NULL) {
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136 | this->collectMap[configCollection] = new oaicollectconfig(configCollection);
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137 | }
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138 | this->collectMap[configCollection]->fieldMap[index] = name;
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139 |
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140 | // cerr << "Mapping " << index << " to " << name << " in " << configCollection << endl;
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141 |
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142 | // TODO: check that the mapped field is actually in use
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143 | }
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144 | else if (key == "oaicollection" && cfgline.size() >= 1) {
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145 | // Configure a collection to be used as part of the OAI archive.
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146 | // This line should read:
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147 | //
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148 | // oaicollection <collectionname>
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149 | //
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150 | // Where <collectionname> is the name of the directory inside the
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151 | // gsdl/collect folder which contains the collection.
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152 | //
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153 | // To configure several collections, merely repeat this line,
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154 | // or alternatively use additional collection names after the
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155 | // first one.
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156 | //
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157 | // This configuration should only appear in main.cfg
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158 | //
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159 | if (this->collection != "") {
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160 | cerr << "Attempt to configure an oai collection outside of main.cfg" << endl;
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161 | cerr << "Configuration attempted in " << this->collection << " collection." << endl;
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162 | exit(1);
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163 | }
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164 | for (int c = 0; c < cfgline.size(); ++c) {
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165 | this->collectList.push_back(cfgline[c]);
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166 | }
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167 | }
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168 | else if (key == "oaiinfo" && cfgline.size() >= 1) {
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169 | // Get a piece of information for the oai repository information
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170 | // request. The line should read:
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171 | //
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172 | // oaiinfo <information field name> <value>
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173 | //
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174 | // This configuration should only be attempted in main.cfg
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175 | //
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176 | if (this->collection != "") {
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177 | cerr << "Attempt to set oai information outside of main.cfg" << endl;
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178 | cerr << "Configuration attempted in " << this->collection << " collection." << endl;
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179 | exit(1);
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180 | }
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181 |
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182 | // if no second parameter is given, then the first parameter
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183 | if (cfgline.size() == 1) {
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184 | this->infoMap[cfgline[0]] = cfgline[0];
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185 | }
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186 | else {
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187 | this->infoMap[cfgline[0]] = cfgline[1];
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188 | }
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189 | }
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190 | else if (key == "oaiversion" && cfgline.size() >= 1) {
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191 | this->oaiVersion = cfgline[0];
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192 | }
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193 | else if (key == "resumeafter" && cfgline.size() >= 1) {
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194 | this->resumptionSize = cfgline[0].getint();
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195 | }
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196 | // get and note a maintainer item to support the Identify Verb of OAI
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197 | else if (key == "maintainer" && cfgline.size() >= 1) {
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198 | int line = 0;
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199 |
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200 | // TODO: exhaustive checks for empty or default values of maintainer
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201 | while (line < cfgline.size()) {
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202 | if (cfgline[line] != "NULL" &&
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203 | cfgline[line] != "") {
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204 | // do something
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205 | break;
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206 | }
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207 | else {
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208 | ++line;
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209 | }
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210 | }
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211 |
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212 | // Only try to set the configuration if we have a legitimate value ...
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213 | if (line < cfgline.size()) {
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214 | // ensure we have a map to write to
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215 | if (this->collectMap[this->collection] == NULL) {
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216 | this->collectMap[this->collection] = new oaicollectconfig(this->collection);
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217 | }
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218 | this->collectMap[this->collection]->maintainer = cfgline[line];
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219 | }
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220 | }
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221 | else if (key == "repositoryName" && cfgline.size() >= 1) {
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222 | int line = 0;
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223 |
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224 | // TODO: exhaustive checks for empty or default values of repositoryName
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225 | while (line < cfgline.size()) {
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226 | if (cfgline[line] != "NULL" &&
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227 | cfgline[line] != "") {
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228 | // do something
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229 | break;
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230 | }
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231 | else {
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232 | ++line;
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233 | }
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234 | }
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235 |
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236 | // Only try to set the configuration if we have a legitimate value ...
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237 | if (line < cfgline.size()) {
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238 | // ensure we have a map to write to
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239 | if (this->collectMap[this->collection] == NULL) {
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240 | this->collectMap[this->collection] = new oaicollectconfig(this->collection);
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241 | }
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242 | this->collectMap[this->collection]->repositoryName = cfgline[line];
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243 | }
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244 | }
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245 | else if (key == "baseURL" && cfgline.size() >= 1) {
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246 | int line = 0;
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247 |
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248 | while (line < cfgline.size()) {
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249 | if (cfgline[line] != "NULL" &&
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250 | cfgline[line] != "") {
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251 | // do something
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252 | break;
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253 | }
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254 | else {
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255 | ++line;
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256 | }
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257 | }
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258 |
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259 | // Only try to set the configuration if we have a legitimate value ...
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260 | if (line < cfgline.size()) {
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261 | // ensure we have a map to write to
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262 | if (this->collectMap[this->collection] == NULL) {
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263 | this->collectMap[this->collection] = new oaicollectconfig(this->collection);
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264 | }
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265 | this->collectMap[this->collection]->baseURL = cfgline[line];
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266 | }
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267 | }
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268 | else if (key == "baseDocRoot" && cfgline.size() >= 1) {
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269 | int line = 0;
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270 |
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271 | while (line < cfgline.size()) {
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272 | if (cfgline[line] != "NULL" &&
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273 | cfgline[line] != "") {
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274 | // do something
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275 | break;
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276 | }
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277 | else {
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278 | ++line;
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279 | }
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280 | }
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281 |
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282 | // Only try to set the configuration if we have a legitimate value ...
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283 | if (line < cfgline.size()) {
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284 | // ensure we have a map to write to
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285 | if (this->collectMap[this->collection] == NULL) {
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286 | this->collectMap[this->collection] = new oaicollectconfig(this->collection);
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287 | }
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288 | this->collectMap[this->collection]->baseDocRoot = cfgline[line];
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289 | }
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290 | }
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291 | }
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292 |
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293 | /**
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294 | * TODO: store all field values in a map per collection
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295 | */
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296 | text_t oaiconfig::getCollectionConfig(const text_t &collection, const text_t &field)
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297 | {
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298 | if (this->collectMap[collection] == NULL) {
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299 | return "";
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300 | }
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301 | if (field == "maintainer") {
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302 | return this->collectMap[collection]->maintainer;
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303 | }
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304 |
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305 | if (field == "repositoryName") {
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306 | return this->collectMap[collection]->repositoryName;
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307 | }
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308 |
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309 | if (field == "baseURL") {
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310 | return this->collectMap[collection]->baseURL;
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311 | }
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312 |
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313 | if (field == "baseDocRoot") {
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314 | return this->collectMap[collection]->baseDocRoot;
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315 | }
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316 |
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317 | return "";
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318 | }
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319 |
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320 | text_t oaiconfig::getMapping(const text_t &collection, const text_t &collectfield)
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321 | {
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322 | if (this->collectMap[collection] == NULL) {
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323 | return "";
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324 | }
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325 | return this->collectMap[collection]->fieldMap[collectfield];
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326 | }
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327 |
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328 | /**
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329 | * Get the mapping for a field in a given collection; if no mapping
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330 | * exists, the result will be a blank string.
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331 | */
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332 | text_t oaiconfig::getMapping(const text_t &collection, const text_t &collectfield, const text_t &formatname)
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333 | {
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334 | text_t fullName = collectfield;
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335 | fullName.append(":");
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336 | fullName.append(formatname);
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337 |
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338 | // try the collection-specific options first
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339 | if (this->collectMap[collection] != NULL) {
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340 | // first try the most specific item - this collection, and given that protocol
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341 | if (this->collectMap[collection]->fieldMap.count(fullName) >= 1) {
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342 | return this->collectMap[collection]->fieldMap[fullName];
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343 | }
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344 | // otherwise, fall back to this collection, and all protocols
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345 | else if (this->collectMap[collection]->fieldMap.count(collectfield) >= 1) {
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346 | return this->collectMap[collection]->fieldMap[collectfield];
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347 | }
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348 | }
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349 |
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350 | // if no mappings exist, return an empty item
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351 | if (this->collectMap[""] == NULL) {
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352 | return "";
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353 | }
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354 |
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355 | // then try generic rules
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356 | if (this->collectMap[""]->fieldMap.count(fullName) >= 1) {
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357 | return this->collectMap[""]->fieldMap[fullName];
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358 | }
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359 | else {
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360 | return this->collectMap[""]->fieldMap[collectfield];
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361 | }
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362 | }
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