2 * Copyright (C) 2007 Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #include <atompub/atom.h>
28 AtomEntry * (*retrieve_entry) (AtomCtx *, AtomID *);
29 void (*enumerate_entries) (AtomCtx *, AtomEntry ***, size_t *);
30 int (*is_feed) (AtomCtx *, AtomID *);
37 backend = g_slice_new (AtomBackend);
38 backend->retrieve_entry = NULL;
39 backend->enumerate_entries = NULL;
44 atom_backend_delete (AtomBackend *backend)
46 g_slice_free (AtomBackend, backend);
50 atom_backend_retrieve_entry_set (AtomBackend *backend,
51 AtomEntry *retrieve_entry (AtomCtx *,
54 backend->retrieve_entry = retrieve_entry;
58 atom_backend_enumerate_entries_set (AtomBackend *backend,
59 void enumerate_entries (AtomCtx *,
60 AtomEntry ***, size_t*))
62 backend->enumerate_entries = enumerate_entries;
66 atom_backend_is_feed_set (AtomBackend *backend,
67 int is_feed (AtomCtx *, AtomID *))
69 backend->is_feed = is_feed;
73 atom_retrieve_entry (AtomCtx *ctx, AtomID *id)
76 backend = atom_backend (ctx);
77 if (backend && backend->retrieve_entry)
78 return backend->retrieve_entry (ctx, id);
83 atom_backend_enumerate_entries (AtomCtx *ctx, AtomEntry *** entries, size_t *len)
86 backend = atom_backend (ctx);
87 if (backend && backend->enumerate_entries)
89 backend->enumerate_entries (ctx, entries, len);
99 atom_is_feed (AtomCtx *ctx, AtomID *id)
101 AtomBackend *backend;
103 backend = atom_backend (ctx);
104 if (backend && backend->is_feed)
106 return backend->is_feed (ctx, id);
108 /* Frontend may make the decision of whether the requested resource is
109 * a feed or not. If it is not able to do so and backend isn't either,
112 aerr = atom_error_new ();
113 atom_error_code_set (aerr, 404);
114 atom_error_message_set (aerr, "Not Found");
115 atom_error_set (ctx, aerr);
120 atom_retrieve_feed (AtomCtx *ctx)
125 atom_backend_enumerate_entries (ctx, &entries, &len);
126 if (atom_error_get (ctx) != NULL)
128 feed = atom_feed_new ();
129 atom_feed_entry_append_array (feed, entries, len);
134 atom_retrieve_resource (AtomCtx *ctx, AtomID *id)
138 if (atom_is_feed (ctx, id))
141 feed = atom_retrieve_feed (ctx);
144 res = atom_resource_new_from_feed (feed);
145 atom_feed_delete (feed);
147 else if (atom_error_get (ctx) == NULL)
150 entry = atom_retrieve_entry (ctx, id);
153 res = atom_resource_new_from_entry (entry);
154 atom_entry_delete (entry);