1 | /**********************************************************************
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2 | *
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3 | * extlinkaction.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 "gsdl_modules_cfg.h"
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27 | #ifdef GSDL_USE_EXTLINK_ACTION
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28 |
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29 | #include <string.h>
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30 | #include "extlinkaction.h"
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31 | #include "recptprototools.h"
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32 | #include "cgiutils.h"
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33 |
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34 | extlinkaction::extlinkaction () {
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35 |
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36 | // this action uses cgi variables "a", "d", and "href"
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37 |
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38 | cgiarginfo arg_ainfo;
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39 | arg_ainfo.shortname = "a";
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40 | arg_ainfo.longname = "action";
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41 | arg_ainfo.multiplechar = true;
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42 | arg_ainfo.multiplevalue = false;
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43 | arg_ainfo.defaultstatus = cgiarginfo::weak;
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44 | arg_ainfo.argdefault = "extlink";
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45 | arg_ainfo.savedarginfo = cgiarginfo::must;
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46 | argsinfo.addarginfo (NULL, arg_ainfo);
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47 |
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48 | arg_ainfo.shortname = "el";
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49 | arg_ainfo.longname = "external link preference";
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50 | arg_ainfo.multiplechar = true;
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51 | arg_ainfo.multiplevalue = false;
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52 | arg_ainfo.defaultstatus = cgiarginfo::weak;
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53 | arg_ainfo.argdefault = "direct"; // changed from "prompt" - will now directly load external links instead of
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54 | // going through an intermediate page indicating that the link is external
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55 | arg_ainfo.savedarginfo = cgiarginfo::must;
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56 | argsinfo.addarginfo (NULL, arg_ainfo);
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57 |
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58 | arg_ainfo.shortname = "d";
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59 | arg_ainfo.longname = "document OID";
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60 | arg_ainfo.multiplechar = true;
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61 | arg_ainfo.multiplevalue = false;
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62 | arg_ainfo.defaultstatus = cgiarginfo::none;
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63 | arg_ainfo.argdefault = g_EmptyText;
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64 | arg_ainfo.savedarginfo = cgiarginfo::can;
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65 | argsinfo.addarginfo (NULL, arg_ainfo);
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66 |
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67 | arg_ainfo.shortname = "href";
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68 | arg_ainfo.longname = "URL of external link";
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69 | arg_ainfo.multiplechar = true;
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70 | arg_ainfo.multiplevalue = false;
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71 | arg_ainfo.defaultstatus = cgiarginfo::none;
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72 | arg_ainfo.argdefault = g_EmptyText;
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73 | arg_ainfo.savedarginfo = cgiarginfo::can;
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74 | argsinfo.addarginfo (NULL, arg_ainfo);
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75 |
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76 | arg_ainfo.shortname = "rl";
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77 | arg_ainfo.longname = "is relative link";
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78 | arg_ainfo.multiplechar = false;
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79 | arg_ainfo.multiplevalue = false;
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80 | arg_ainfo.defaultstatus = cgiarginfo::none;
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81 | arg_ainfo.argdefault = "0";
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82 | arg_ainfo.savedarginfo = cgiarginfo::mustnot;
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83 | argsinfo.addarginfo (NULL, arg_ainfo);
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84 |
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85 | }
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86 |
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87 | extlinkaction::~extlinkaction () {
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88 | }
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89 |
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90 |
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91 | void extlinkaction::get_cgihead_info (cgiargsclass &args, recptprotolistclass *protos,
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92 | response_t &response, text_t &response_data,
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93 | ostream &logout) {
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94 |
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95 | text_t link;
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96 | if (get_link (args, protos, link, logout)) {
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97 | response = location;
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98 | response_data = link;
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99 | return;
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100 | }
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101 |
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102 | // external link
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103 | if (!link.empty()) {
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104 | if (args["el"] == "direct") {
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105 | response = location;
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106 | response_data = link;
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107 | return;
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108 | }
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109 | }
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110 |
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111 | response = content;
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112 | response_data = "text/html";
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113 | }
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114 |
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115 | void extlinkaction::define_internal_macros (displayclass &disp, cgiargsclass &args,
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116 | recptprotolistclass * /*protos*/,
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117 | ostream &/*logout*/) {
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118 |
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119 | // define_internal_macros sets the following macros:
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120 |
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121 | // _nexturl_ link to external page
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122 | // _prevdoc_ link to previous document
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123 | // disp.setmacro("nexturl", "extlink", cgi_safe(args["href"]));
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124 | // problem in whist, above line changed. Perhaps decode_cgi_arg ??
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125 | // see also HTML plugin
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126 | disp.setmacro("nexturl", "extlink", args["href"]);
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127 | disp.setmacro("prevdoc", "extlink", args["d"]);
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128 | }
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129 |
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130 |
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131 | // if link is found returns true and url in link, otherwise returns
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132 | // false
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133 | bool extlinkaction::get_link (cgiargsclass &args, recptprotolistclass *protos,
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134 | text_t &link, ostream &logout) {
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135 |
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136 | text_t &arg_href = args["href"];
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137 | text_t &thiscollection = args["c"];
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138 | if (arg_href.empty()) return false;
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139 |
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140 | text_t httpdoc = "_gwcgi_?e=_compressedoptions_&a=d";
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141 | if (args["rl"] == "1") {
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142 |
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143 | FilterResponse_t response;
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144 | text_tset metadata;
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145 | metadata.insert ("section");
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146 |
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147 | recptproto *collectproto = protos->getrecptproto (thiscollection, logout);
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148 |
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149 | if (get_info (arg_href, thiscollection, args["l"], metadata, false, collectproto, response, logout)) {
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150 | if (!response.docInfo[0].metadata["section"].values[0].empty()) {
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151 | link = httpdoc+"&d=" + response.docInfo[0].metadata["section"].values[0];
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152 | return true;
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153 | }
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154 | }
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155 |
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156 | // need to see if link exists in any other collection
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157 | // if cross-collection searching/browsing is turned on
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158 | if (args["ccs"] == "1" && !args["cc"].empty()) {
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159 | text_tarray collections;
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160 | splitchar (args["cc"].begin(), args["cc"].end(), ',', collections);
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161 |
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162 | text_tarray::const_iterator col_here = collections.begin();
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163 | text_tarray::const_iterator col_end = collections.end();
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164 |
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165 | while (col_here != col_end) {
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166 |
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167 | // don't need to check current collection again
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168 | if (*col_here == thiscollection) {++col_here; continue;}
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169 |
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170 | recptproto *collectproto = protos->getrecptproto (*col_here, logout);
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171 | if (collectproto == NULL) {++col_here; continue;}
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172 |
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173 | if (get_info (arg_href, *col_here, args["l"], metadata, false, collectproto, response, logout)) {
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174 | if (!response.docInfo[0].metadata["section"].values[0].empty()) {
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175 | link = httpdoc+"&c=" + *col_here + "&d=" +
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176 | response.docInfo[0].metadata["section"].values[0];
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177 | return true;
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178 | }
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179 | }
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180 | ++col_here;
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181 | }
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182 | }
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183 | return false;
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184 |
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185 | } else {
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186 | // link is external
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187 | link = arg_href;
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188 | return false;
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189 | }
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190 | }
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191 |
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192 |
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193 | bool extlinkaction::do_action (cgiargsclass &args, recptprotolistclass *protos,
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194 | browsermapclass * /*browsers*/, displayclass &disp,
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195 | outconvertclass &outconvert, ostream &textout,
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196 | ostream &logout) {
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197 |
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198 | if (args["href"].empty()) {
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199 | // oops, this shouldn't happen
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200 | textout << outconvert << disp << ("_extlink:header_\n")
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201 | << ("_extlink:notfoundcontent_\n")
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202 | << ("_extlink:footer_\n");
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203 | return true;
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204 | }
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205 |
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206 | if (args["rl"] == "1") {
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207 | // need to see if link exists in any other collection
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208 | // if cross-collection searching/browsing is turned on
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209 | if (args["ccs"] == "1" && !args["cc"].empty()) {
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210 |
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211 | FilterResponse_t response;
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212 | text_tset metadata;
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213 | metadata.insert ("section");
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214 | text_tarray collections;
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215 | splitchar (args["cc"].begin(), args["cc"].end(), ',', collections);
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216 |
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217 | text_tarray::const_iterator col_here = collections.begin();
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218 | text_tarray::const_iterator col_end = collections.end();
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219 |
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220 | while (col_here != col_end) {
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221 |
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222 | // don't need to check current collection
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223 | if (*col_here == args["c"]) {++col_here; continue;}
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224 |
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225 | recptproto *collectproto = protos->getrecptproto (*col_here, logout);
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226 | if (get_info (args["href"], *col_here, args["l"], metadata, false, collectproto, response, logout)) {
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227 | if (!response.docInfo[0].metadata["section"].values[0].empty()) {
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228 | ColInfoResponse_t *cinfo = recpt->get_collectinfo_ptr (collectproto, *col_here, logout);
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229 | text_t collectionname = cinfo->get_collectionmeta("collectionname", args["l"]); //
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230 | if (collectionname.empty()) {
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231 | collectionname = *col_here;
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232 | }
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233 | textout << outconvert << disp << ("_extlink:header_\n")
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234 | << ("_extlink:foundintcontent_(" + *col_here + ", " + collectionname +
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235 | ", " + response.docInfo[0].metadata["section"].values[0] + "\n")
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236 | << ("_extlink:footer_\n");
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237 | return true;
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238 | }
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239 | }
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240 | ++col_here;
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241 | }
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242 | }
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243 | textout << outconvert << disp << ("_extlink:header_\n")
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244 | << ("_extlink:notfoundcontent_\n")
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245 | << ("_extlink:footer_\n");
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246 |
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247 |
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248 | } else {
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249 | // link is external
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250 | textout << outconvert << disp << ("_extlink:header_\n")
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251 | << ("_extlink:foundcontent_\n")
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252 | << ("_extlink:footer_\n");
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253 | }
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254 |
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255 | return true;
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256 | }
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257 |
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258 | #endif //GSDL_USE_EXTLINK_ACTION
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