| 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 |
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| 27 | #include <string.h>
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| 28 | #include "extlinkaction.h"
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| 29 |
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| 30 | extlinkaction::extlinkaction () {
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| 31 |
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| 32 | // this action uses cgi variables "a", "d", and "href"
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| 33 |
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| 34 | cgiarginfo arg_ainfo;
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| 35 | arg_ainfo.shortname = "a";
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| 36 | arg_ainfo.longname = "action";
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| 37 | arg_ainfo.multiplechar = true;
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| 38 | arg_ainfo.defaultstatus = cgiarginfo::weak;
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| 39 | arg_ainfo.argdefault = "extlink";
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| 40 | arg_ainfo.savedarginfo = cgiarginfo::must;
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| 41 | argsinfo.addarginfo (NULL, arg_ainfo);
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| 42 |
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| 43 | arg_ainfo.shortname = "el";
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| 44 | arg_ainfo.longname = "external link preference";
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| 45 | arg_ainfo.multiplechar = true;
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| 46 | arg_ainfo.defaultstatus = cgiarginfo::weak;
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| 47 | arg_ainfo.argdefault = "prompt";
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| 48 | arg_ainfo.savedarginfo = cgiarginfo::must;
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| 49 | argsinfo.addarginfo (NULL, arg_ainfo);
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| 50 |
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| 51 | arg_ainfo.shortname = "d";
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| 52 | arg_ainfo.longname = "document OID";
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| 53 | arg_ainfo.multiplechar = true;
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| 54 | arg_ainfo.defaultstatus = cgiarginfo::none;
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| 55 | arg_ainfo.argdefault = "";
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| 56 | arg_ainfo.savedarginfo = cgiarginfo::can;
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| 57 | argsinfo.addarginfo (NULL, arg_ainfo);
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| 58 |
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| 59 |
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| 60 | arg_ainfo.shortname = "href";
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| 61 | arg_ainfo.longname = "URL of external link";
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| 62 | arg_ainfo.multiplechar = true;
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| 63 | arg_ainfo.defaultstatus = cgiarginfo::none;
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| 64 | arg_ainfo.argdefault = "";
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| 65 | arg_ainfo.savedarginfo = cgiarginfo::can;
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| 66 | argsinfo.addarginfo (NULL, arg_ainfo);
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| 67 |
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| 68 | }
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| 69 |
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| 70 | extlinkaction::~extlinkaction () {
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| 71 | }
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| 72 |
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| 73 |
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| 74 |
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| 75 | void extlinkaction::get_cgihead_info (cgiargsclass &args, response_t &response,
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| 76 | text_t &response_data, ostream &/*logout*/)
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| 77 | {
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| 78 | if (args["el"] == "direct")
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| 79 | {
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| 80 | response = location;
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| 81 | response_data = args["href"];
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| 82 | }
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| 83 | else
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| 84 | {
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| 85 | response = content;
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| 86 | response_data = "text/html";
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| 87 | }
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| 88 | }
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| 89 |
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| 90 |
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| 91 |
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| 92 | void extlinkaction::define_internal_macros (const ColInfoResponse_t &/*collectinfo*/, displayclass &disp,
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| 93 | cgiargsclass &args, recptproto *collectproto,
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| 94 | ostream &/*logout*/) {
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| 95 |
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| 96 | // define_internal_macros sets the following macros:
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| 97 |
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| 98 | // _nexturl_ link to external page
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| 99 | // _prevdoc_ link to previous document
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| 100 |
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| 101 | // can't do anything if collectproto is null (i.e. no collection was specified)
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| 102 | if (collectproto == NULL) return;
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| 103 |
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| 104 | disp.setmacro("nexturl", "extlink", args["href"]);
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| 105 | disp.setmacro("prevdoc", "extlink", args["d"]);
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| 106 | }
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| 107 |
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| 108 |
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| 109 | bool extlinkaction::do_action (cgiargsclass &args, const ColInfoResponse_t &/*collectinfo*/,
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| 110 | recptproto * /*collectproto*/, displayclass &disp,
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| 111 | outconvertclass &outconvert, ostream &textout,
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| 112 | ostream &/*logout*/) {
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| 113 |
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| 114 | if (args["el"] != "direct")
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| 115 | {
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| 116 | if (args["href"] != "")
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| 117 | {
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| 118 | textout << outconvert << disp << ("_extlink:header_\n")
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| 119 | << ("_extlink:foundcontent_\n")
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| 120 | << ("_extlink:footer_\n");
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| 121 | }
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| 122 | else
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| 123 | {
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| 124 | textout << outconvert << disp << ("_extlink:header_\n")
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| 125 | << ("_extlink:notfoundcontent_\n")
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| 126 | << ("_extlink:footer_\n");
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| 127 | }
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| 128 | }
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| 129 |
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| 130 | return true;
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| 131 | }
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| 132 |
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| 133 |
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| 134 |
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