1 | /**********************************************************************
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2 | *
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3 | * action.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 | * $Id: action.cpp 754 1999-11-01 21:10:57Z sjboddie $
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25 | *
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26 | *********************************************************************/
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27 |
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28 | /*
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29 | $Log$
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30 | Revision 1.18 1999/11/01 21:10:57 sjboddie
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31 | chnaged arguments passed to many functions
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32 |
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33 | Revision 1.17 1999/09/07 23:04:03 rjmcnab
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34 | got rid of some compiler warnings
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35 |
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36 | Revision 1.16 1999/09/07 04:56:51 sjboddie
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37 | added GPL notice
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38 |
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39 | Revision 1.15 1999/09/03 09:51:47 rjmcnab
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40 | removed the argdefault configuration option (it should now be
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41 | done with cgiarg)
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42 |
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43 | Revision 1.14 1999/09/02 00:22:42 rjmcnab
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44 | Changes to get it compiling on AIX
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45 |
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46 | Revision 1.13 1999/07/30 02:24:43 sjboddie
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47 | added collectinfo argument to some functions
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48 |
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49 | Revision 1.12 1999/07/10 22:15:30 rjmcnab
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50 | Added function check_external_cgiargs so that actions that
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51 | are not being called can override cgi arguments.
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52 |
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53 | Revision 1.11 1999/06/08 04:29:41 sjboddie
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54 | added argsinfo to the call to check_cgiargs to make it easy to set
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55 | args to their default if they're found to be screwed up
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56 |
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57 | Revision 1.10 1999/03/25 03:06:44 sjboddie
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58 |
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59 | altered receptionist slightly so it now passes *collectproto to
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60 | define_internal_macros and define_external_macros - need it
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61 | for browseaction
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62 |
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63 | Revision 1.9 1999/02/28 23:16:00 rjmcnab
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64 |
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65 | Fixed a compiler warning.
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66 |
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67 | Revision 1.8 1999/02/28 20:00:11 rjmcnab
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68 |
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69 |
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70 | Fixed a few things.
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71 |
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72 | Revision 1.7 1999/02/25 21:58:58 rjmcnab
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73 |
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74 | Merged sources.
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75 |
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76 | Revision 1.6 1999/02/21 22:33:52 rjmcnab
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77 |
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78 | Lots of stuff :-)
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79 |
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80 | Revision 1.5 1999/02/11 01:24:04 rjmcnab
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81 |
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82 | Fixed a few compiler warnings.
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83 |
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84 | Revision 1.4 1999/02/08 01:27:59 rjmcnab
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85 |
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86 | Got the receptionist producing something using the statusaction.
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87 |
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88 | Revision 1.3 1999/02/05 10:42:41 rjmcnab
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89 |
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90 | Continued working on receptionist
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91 |
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92 | Revision 1.2 1999/02/04 10:00:53 rjmcnab
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93 |
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94 | Developed the idea of an "action" and having them define the cgi arguments
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95 | which they need and how those cgi arguments function.
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96 |
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97 | Revision 1.1 1999/01/08 08:40:52 rjmcnab
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98 |
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99 | Moved from lib directory.
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100 |
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101 | Revision 1.1 1999/01/08 03:57:44 rjmcnab
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102 |
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103 | Initial revision
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104 |
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105 | */
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106 |
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107 |
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108 | #include "action.h"
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109 | #include <assert.h>
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110 |
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111 |
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112 | // define all the macros which are related to pages generated
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113 | // by this action
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114 | void action::define_internal_macros (displayclass &/*disp*/, cgiargsclass &/*args*/,
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115 | recptprotolistclass * /*protos*/, ostream &/*logout*/) {
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116 | }
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117 |
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118 | action::action () {
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119 | }
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120 |
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121 | action::~action () {
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122 | }
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123 |
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124 | // configure should be called once for each configuration line
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125 | // the default version does nothing
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126 | void action::configure (const text_t &/*key*/, const text_tarray &/*cfgline*/) {
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127 | }
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128 |
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129 | // init should be called after all the configuration is done but
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130 | // before any other methods are called
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131 | bool action::init (ostream &/*logout*/) {
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132 | return true;
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133 | }
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134 |
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135 | // returns the "a" argument value that will specify this action
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136 | // this name should be short but does not have to be one character
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137 | // long
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138 | text_t action::get_action_name () {
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139 | return "nzdl";
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140 | }
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141 |
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142 | // check_cgiargs should be called before get_cgihead_info,
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143 | // define_external_macros, and do_action. If an error is found
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144 | // a message will be written to logout, if the error is severe
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145 | // then the function will return false and no page content
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146 | // should be produced based on the arguments.
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147 | bool action::check_cgiargs (cgiargsinfoclass &/*argsinfo*/, cgiargsclass &/*args*/,
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148 | ostream &/*logout*/) {
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149 | return true;
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150 | }
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151 |
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152 | // check_external_cgiargs should be called after check_cgiargs
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153 | // for all actions. It should only be used to override some other
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154 | // normal behaviour, for example, producing a login page when
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155 | // the requested page needs authentication.
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156 | bool action::check_external_cgiargs (cgiargsinfoclass &/*argsinfo*/,
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157 | cgiargsclass &/*args*/,
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158 | outconvertclass &/*outconvert*/,
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159 | const text_t &/*saveconf*/,
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160 | ostream &/*logout*/) {
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161 | return true;
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162 | }
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163 |
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164 | // get_cgihead_info determines the cgi header information for
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165 | // a set of cgi arguments. If response contains location then
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166 | // response_data contains the redirect address. If reponse
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167 | // contains content then reponse_data contains the content-type.
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168 | // Note that images can now be produced by the receptionist.
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169 | void action::get_cgihead_info (cgiargsclass &/*args*/, recptprotolistclass * /*protos*/,
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170 | response_t &response, text_t &response_data,
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171 | ostream &/*logout*/) {
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172 | response = location;
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173 | response_data = "http://www.nzdl.org";
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174 | }
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175 |
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176 | // uses_display should return true if the receptionist should return
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177 | // true if the display class is needed to output the page content
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178 | // The default is to return true.
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179 | bool action::uses_display (cgiargsclass &/*args*/) {
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180 | return true;
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181 | }
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182 |
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183 |
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184 | // define all the macros which might be used by other actions
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185 | // to produce pages. These macros should be well documented.
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186 | void action::define_external_macros (displayclass &/*disp*/, cgiargsclass &/*args*/,
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187 | recptprotolistclass * /*protos*/, ostream &/*logout*/) {
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188 | }
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189 |
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190 | // returns false if there was an error which prevented the action
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191 | // from outputing anything.
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192 | bool action::do_action (cgiargsclass &/*args*/, recptprotolistclass * /*protos*/,
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193 | browsermapclass * /*browsers*/, displayclass &/*disp*/,
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194 | outconvertclass &/*outconvert*/, ostream &/*textout*/,
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195 | ostream &/*logout*/) {
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196 | return true;
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197 | }
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198 |
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199 |
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200 | bool operator==(const actionptr &x, const actionptr &y) {
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201 | return (x.a == y.a);
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202 | }
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203 |
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204 | bool operator<(const actionptr &x, const actionptr &y) {
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205 | return (x.a < y.a);
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206 | }
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207 |
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208 |
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209 | // theaction remains the property of the calling code but
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210 | // should not be deleted until it is removed from this list.
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211 | void actionmapclass::addaction (action *theaction) {
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212 | // can't add a null action
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213 | assert (theaction != NULL);
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214 | if (theaction == NULL) return;
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215 |
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216 | // can't add an action with no name
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217 | assert (!(theaction->get_action_name()).empty());
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218 | if ((theaction->get_action_name()).empty()) return;
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219 |
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220 | actionptr aptr;
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221 | aptr.a = theaction;
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222 | actionptrs[theaction->get_action_name()] = aptr;
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223 | }
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224 |
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225 | // getaction will return NULL if the action could not be found
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226 | action *actionmapclass::getaction (const text_t &key) {
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227 | // can't find an action with no name
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228 | assert (!key.empty());
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229 | if (key.empty()) return NULL;
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230 |
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231 | iterator here = actionptrs.find (key);
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232 | if (here == actionptrs.end()) return NULL;
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233 |
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234 | return (*here).second.a;
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235 | }
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236 |
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