[188] | 1 | /**********************************************************************
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| 2 | *
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| 3 | * OIDtools.cpp --
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| 4 | * Copyright (C) 1999 The New Zealand Digital Library Project
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| 5 | *
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[533] | 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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[188] | 9 | *
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[533] | 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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[188] | 24 | * $Id: OIDtools.cpp 739 1999-10-24 07:24:34Z 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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[739] | 30 | Revision 1.18 1999/10/24 07:24:34 sjboddie
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| 31 | small change to allow FullTOC option
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| 32 |
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[649] | 33 | Revision 1.17 1999/10/10 08:14:02 sjboddie
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| 34 | - metadata now returns mp rather than array
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| 35 | - redesigned browsing support (although it's not finished so
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| 36 | won't currently work ;-)
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| 37 |
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[533] | 38 | Revision 1.16 1999/09/07 04:56:51 sjboddie
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| 39 | added GPL notice
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| 40 |
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[505] | 41 | Revision 1.15 1999/09/02 00:22:04 rjmcnab
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| 42 | added extra check in get_info
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| 43 |
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[472] | 44 | Revision 1.14 1999/08/25 04:45:25 sjboddie
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| 45 | changed FilterRequest_t::docSet into an array
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| 46 |
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[445] | 47 | Revision 1.13 1999/08/10 22:44:06 sjboddie
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| 48 | altered the get_contents function so it's now passed metadata
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| 49 | rather than having it hard-coded
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| 50 |
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[423] | 51 | Revision 1.12 1999/07/30 02:26:44 sjboddie
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| 52 | added overloaded get_info function for getting info on multiple OIDs
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| 53 |
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[406] | 54 | Revision 1.11 1999/07/20 02:59:03 sjboddie
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| 55 | get_children now takes a getParents argument
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| 56 |
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[346] | 57 | Revision 1.10 1999/07/07 05:47:41 sjboddie
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| 58 | changed around the way browsetools works
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| 59 |
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[280] | 60 | Revision 1.9 1999/06/16 23:51:53 sjboddie
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| 61 | added a strip_suffix function
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| 62 |
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[278] | 63 | Revision 1.8 1999/06/16 03:11:25 sjboddie
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| 64 | get_info() now takes a getParents argument
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| 65 |
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[274] | 66 | Revision 1.7 1999/06/16 02:05:23 sjboddie
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| 67 | just changed a comment that was confusing me
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| 68 |
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[257] | 69 | Revision 1.6 1999/05/10 03:40:25 sjboddie
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| 70 | lots of changes - slowly getting document action sorted out
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| 71 |
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[248] | 72 | Revision 1.5 1999/04/30 01:59:37 sjboddie
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| 73 | lots of stuff - getting documentaction working (documentaction replaces
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| 74 | old browseaction)
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| 75 |
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[213] | 76 | Revision 1.4 1999/03/29 02:14:25 sjboddie
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| 77 |
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| 78 | More changes to browseaction
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| 79 |
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[211] | 80 | Revision 1.3 1999/03/25 03:13:42 sjboddie
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| 81 |
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| 82 | More library functions for dealing with OIDs. Many of them just
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| 83 | return dummy data at present
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| 84 |
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[189] | 85 | Revision 1.2 1999/03/05 03:53:53 sjboddie
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| 86 |
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| 87 | fixed some bugs
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| 88 |
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[188] | 89 | Revision 1.1 1999/03/04 22:38:20 sjboddie
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| 90 |
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| 91 | Added subjectbrowseaction. - Doesn't do anything yet.
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| 92 |
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| 93 | */
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| 94 |
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| 95 | #include "OIDtools.h"
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| 96 |
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| 97 |
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[211] | 98 | // returns (in top) the top level of OID (i.e. everything
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[189] | 99 | // up until the first dot)
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[211] | 100 | void get_top (const text_t &OID, text_t &top) {
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[189] | 101 |
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| 102 | top.clear();
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[248] | 103 | if (OID.empty()) return;
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| 104 |
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[211] | 105 | text_t::const_iterator begin = OID.begin();
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| 106 | text_t::const_iterator end = OID.end();
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[189] | 107 |
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| 108 | top.appendrange (begin, findchar(begin, end, '.'));
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| 109 | }
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| 110 |
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| 111 |
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[211] | 112 | // checks if OID is top level (i.e. contains no dots)
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| 113 | bool is_top (const text_t &OID) {
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[189] | 114 |
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[211] | 115 | if (OID.empty()) return true;
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| 116 |
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| 117 | text_t::const_iterator here = OID.begin();
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| 118 | text_t::const_iterator end = OID.end();
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[189] | 119 | here = findchar (here, end, '.');
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| 120 |
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| 121 | if (here == end) return true;
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| 122 | return false;
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| 123 | }
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[211] | 124 |
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| 125 |
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| 126 | // get_parents_array loads the parents array with all the parents of the
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[274] | 127 | // document or classification specified by OID (not including OID itself)
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[211] | 128 | void get_parents_array (const text_t &OID, text_tarray &parents) {
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| 129 |
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| 130 | text_t::const_iterator here = OID.begin ();
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| 131 | text_t::const_iterator end = OID.end ();
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| 132 | text_t thisparent;
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| 133 |
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| 134 | while (here != end) {
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| 135 | if (*here == '.') parents.push_back(thisparent);
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| 136 | thisparent.push_back(*here);
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| 137 | here ++;
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| 138 | }
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| 139 | }
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| 140 |
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| 141 |
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[248] | 142 | // get_info does a protocol call and returns (in response) the metadata
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[649] | 143 | // associated with OID. Metadata should be loaded with whatever
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[248] | 144 | // metadata fields are to be requested.
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[211] | 145 |
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[248] | 146 | bool get_info (const text_t &OID, const text_t &collection,
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[649] | 147 | const text_tset &metadata, bool getParents,
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[472] | 148 | recptproto *collectproto, FilterResponse_t &response,
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[278] | 149 | ostream &logout) {
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[211] | 150 |
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[248] | 151 | response.clear();
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| 152 |
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| 153 | comerror_t err;
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| 154 | FilterRequest_t request;
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| 155 |
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| 156 | request.filterName = "NullFilter";
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| 157 | request.filterResultOptions = FRmetadata;
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[278] | 158 | request.getParents = getParents;
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[248] | 159 | request.fields = metadata;
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[472] | 160 | request.docSet.push_back (OID);
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[248] | 161 |
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| 162 | collectproto->filter (collection, request, response, err, logout);
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| 163 | if (err != noError) {
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| 164 | outconvertclass text_t2ascii;
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| 165 | logout << text_t2ascii
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| 166 | << "Error: call to filter failed for " << OID
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| 167 | << " in OIDtools::get_info ("
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| 168 | << get_comerror_string (err) << ")\n";
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| 169 | return false;
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| 170 | }
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[505] | 171 |
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[248] | 172 | return true;
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[211] | 173 | }
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| 174 |
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[423] | 175 | bool get_info (const text_tarray &OIDs, const text_t &collection,
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[649] | 176 | const text_tset &metadata, bool getParents,
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[472] | 177 | recptproto *collectproto, FilterResponse_t &response,
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[423] | 178 | ostream &logout) {
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| 179 |
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| 180 | response.clear();
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| 181 | if (OIDs.empty()) return true;
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| 182 |
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| 183 | comerror_t err;
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| 184 | FilterRequest_t request;
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| 185 |
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| 186 | request.filterName = "NullFilter";
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| 187 | request.filterResultOptions = FRmetadata;
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| 188 | request.getParents = getParents;
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| 189 | request.fields = metadata;
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| 190 |
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[472] | 191 | request.docSet = OIDs;
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[423] | 192 |
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| 193 | collectproto->filter (collection, request, response, err, logout);
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| 194 | if (err != noError) {
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| 195 | outconvertclass text_t2ascii;
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| 196 | logout << text_t2ascii
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| 197 | << "Error: call to filter failed in OIDtools::get_info ("
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| 198 | << get_comerror_string (err) << ")\n";
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| 199 | return false;
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| 200 | }
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[505] | 201 |
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[423] | 202 | return true;
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| 203 | }
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| 204 |
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[257] | 205 | // has_children returns true if OID has children
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| 206 | bool has_children (const text_t &OID, const text_t &collection,
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| 207 | recptproto *collectproto, ostream &logout) {
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| 208 |
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| 209 | FilterResponse_t response;
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[649] | 210 | text_tset metadata;
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| 211 | metadata.insert ("haschildren");
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[257] | 212 |
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[278] | 213 | if (get_info (OID, collection, metadata, false, collectproto, response, logout)) {
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[649] | 214 | if (response.docInfo[0].metadata["haschildren"].values[0] == "1")
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[257] | 215 | return true;
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| 216 | }
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| 217 | return false;
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| 218 | }
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| 219 |
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| 220 |
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[248] | 221 | // get_children does a protocol call and returns (in response) the OIDs and
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[649] | 222 | // metadata of all the children of OID. The metadata set should be loaded
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[248] | 223 | // with whatever metadata fields are to be requested.
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[211] | 224 |
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[248] | 225 | bool get_children (const text_t &OID, const text_t &collection,
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[649] | 226 | const text_tset &metadata, bool getParents,
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[406] | 227 | recptproto *collectproto, FilterResponse_t &response,
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| 228 | ostream &logout) {
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[248] | 229 |
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| 230 | response.clear();
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| 231 |
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| 232 | comerror_t err;
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| 233 | FilterRequest_t request;
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| 234 | OptionValue_t option;
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| 235 |
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| 236 | option.name = "ParentNode";
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| 237 | option.value = OID;
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| 238 | request.filterOptions.push_back (option);
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| 239 | request.filterName = "BrowseFilter";
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| 240 | request.filterResultOptions = FROID | FRmetadata;
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| 241 | request.fields = metadata;
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[406] | 242 | request.getParents = getParents;
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[248] | 243 |
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| 244 | collectproto->filter (collection, request, response, err, logout);
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| 245 |
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| 246 | if (err != noError) {
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| 247 | outconvertclass text_t2ascii;
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| 248 | logout << text_t2ascii
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| 249 | << "Error: call to filter failed for " << OID
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| 250 | << " in OIDtools::get_children ("
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| 251 | << get_comerror_string (err) << ")\n";
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| 252 | return false;
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| 253 | }
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| 254 | return true;
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| 255 | }
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| 256 |
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[211] | 257 | // get_parent returns the parent of the document or classification
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| 258 | // specified by OID
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| 259 | text_t get_parent (text_t OID) {
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| 260 |
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| 261 | if (OID.empty() || is_top (OID)) return "";
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| 262 |
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| 263 | text_t::const_iterator begin = OID.begin();
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| 264 | text_t::const_iterator here = (OID.end() - 1);
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| 265 |
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| 266 | while (here >= begin) {
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| 267 | OID.pop_back();
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| 268 | if (*here == '.') break;
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| 269 | here --;
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| 270 | }
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| 271 | return OID;
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| 272 | }
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| 273 |
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[257] | 274 | // takes an OID like ".2 and replaces the " with parent
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[248] | 275 | void translate_parent (text_t &OID, const text_t &parent) {
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[211] | 276 |
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[248] | 277 | text_t::const_iterator here = OID.begin();
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| 278 | text_t::const_iterator end = OID.end();
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| 279 | text_t temp;
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| 280 |
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| 281 | while (here != end) {
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| 282 | if (*here == '"') temp += parent;
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| 283 | else temp.push_back (*here);
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| 284 | here ++;
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| 285 | }
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| 286 | OID = temp;
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[211] | 287 | }
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[248] | 288 |
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| 289 | // shrink_parent does the opposite to translate_parent
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| 290 | void shrink_parent (text_t &OID) {
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| 291 |
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[257] | 292 | text_tarray tmp;
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| 293 | splitchar (OID.begin(), OID.end(), '.', tmp);
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| 294 | OID = "\"." + tmp.back();
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[248] | 295 | }
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| 296 |
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| 297 | // checks if OID uses ".fc", ".lc", ".pr", ".ns",
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| 298 | // or ".ps" syntax (first child, last child, parent,
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| 299 | // next sibling, previous sibling)
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| 300 | bool needs_translating (const text_t &OID) {
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| 301 |
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| 302 | if (OID.size() < 4) return false;
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| 303 |
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| 304 | text_t tail = substr (OID.end()-3, OID.end());
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| 305 | if (tail == ".fc" || tail == ".lc" || tail == ".pr" ||
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| 306 | tail == ".ns" || tail == ".ps") return true;
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| 307 |
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| 308 | return false;
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| 309 | }
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[257] | 310 |
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[280] | 311 | // strips the ".fc", ".lc", ".pr", ".ns",
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| 312 | // or ".ps" suffix from the end of OID
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| 313 | void strip_suffix (text_t &OID) {
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[257] | 314 |
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[280] | 315 | text_t tail = substr (OID.end()-3, OID.end());
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| 316 | while (tail == ".fc" || tail == ".lc" || tail == ".pr" ||
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| 317 | tail == ".ns" || tail == ".ps") {
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| 318 | OID.erase (OID.end()-3, OID.end());
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| 319 | tail = substr (OID.end()-3, OID.end());
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| 320 | }
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| 321 | }
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| 322 |
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[649] | 323 | static void recurse_contents (ResultDocInfo_t section, const bool &is_classify,
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| 324 | const text_t &collection, const text_tset &metadata,
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| 325 | recptproto *collectproto, FilterResponse_t &response,
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| 326 | ostream &logout) {
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[445] | 327 |
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[649] | 328 | int haschildren = section.metadata["haschildren"].values[0].getint();
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| 329 | const text_t &doctype = section.metadata["doctype"].values[0];
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[257] | 330 |
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[649] | 331 | if ((haschildren == 1) && ((!is_classify) || (doctype == "classify"))) {
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[257] | 332 | FilterResponse_t tmp;
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[406] | 333 | bool getParents = false;
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| 334 | get_children (section.OID, collection, metadata, getParents, collectproto, tmp, logout);
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[649] | 335 | ResultDocInfo_tarray::iterator thisdoc = tmp.docInfo.begin();
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| 336 | ResultDocInfo_tarray::iterator lastdoc = tmp.docInfo.end();
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[257] | 337 | while (thisdoc != lastdoc) {
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| 338 | response.docInfo.push_back (*thisdoc);
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[649] | 339 | recurse_contents (*thisdoc, is_classify, collection, metadata,
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| 340 | collectproto, response, logout);
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[257] | 341 | thisdoc ++;
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| 342 | }
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| 343 | }
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| 344 | }
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| 345 |
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| 346 | // get_contents returns OIDs and metadata of all contents
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| 347 | // below (and including) OID.
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[649] | 348 | void get_contents (const text_t &topOID, const bool &is_classify,
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| 349 | text_tset &metadata, const text_t &collection,
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| 350 | recptproto *collectproto, FilterResponse_t &response,
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| 351 | ostream &logout) {
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[257] | 352 |
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[445] | 353 | if (topOID.empty()) return;
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[257] | 354 | response.clear();
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| 355 |
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[649] | 356 | metadata.insert ("haschildren");
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| 357 | metadata.insert ("doctype");
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[445] | 358 |
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[257] | 359 | // get topOIDs info
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[278] | 360 | if (get_info (topOID, collection, metadata, false, collectproto, response, logout))
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[649] | 361 | recurse_contents (response.docInfo[0], is_classify, collection,
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[257] | 362 | metadata, collectproto, response, logout);
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| 363 | }
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[346] | 364 |
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| 365 | // is_child_of returns true if OID2 is a child of OID1
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| 366 | bool is_child_of(const text_t &OID1, const text_t &OID2) {
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| 367 |
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| 368 | text_t parent = get_parent(OID2);
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| 369 |
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| 370 | while (!parent.empty()) {
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| 371 | if (parent == OID1) return true;
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| 372 | parent = get_parent(parent);
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| 373 | }
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| 374 | return false;
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| 375 | }
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