2 * Blog view renderer module for WebCit
4 * Copyright (c) 1996-2011 by the citadel.org team
6 * This program is open source software. You can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation -- either version 3 of the
9 * License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "webserver.h"
27 * Generate a permalink for a post
28 * (Call with NULL arguments to make this function wcprintf() the permalink
29 * instead of writing it to the template)
31 void tmplput_blog_permalink(StrBuf *Target, WCTemplputParams *TP) {
34 strcpy(perma, "/readfwd?go=");
35 urlesc(&perma[strlen(perma)], sizeof(perma)-strlen(perma), (char *)ChrPtr(WC->CurRoom.name));
36 snprintf(&perma[strlen(perma)], sizeof(perma)-strlen(perma), "?p=%d", WC->bptlid);
38 wc_printf("%s", perma);
41 StrBufAppendPrintf(Target, "%s", perma);
47 * Render single blog post and (optionally) its comments
49 void blogpost_render(struct blogpost *bp, int with_comments)
54 WC->bptlid = bp->top_level_id;
56 /* Always show the top level post, unless we somehow ended up with an empty list */
57 if (bp->num_msgs > 0) {
58 read_message(WC->WBuf, HKEY("view_blog_post"), bp->msgs[0], NULL, &Mime);
61 /* If we were asked to suppress comments, show only the comment count */
63 /* Show the number of comments */
64 wc_printf("<a href=\"readfwd?p=%d?go=", bp->top_level_id);
65 urlescputs(ChrPtr(WC->CurRoom.name));
66 wc_printf("#comments\">");
67 wc_printf(_("%d comments"), bp->num_msgs - 1);
68 wc_printf("</a> | <a href=\"");
69 tmplput_blog_permalink(NULL, NULL);
70 wc_printf("\">%s</a>", _("permalink"));
71 wc_printf("<br><br><br>\n");
74 else if (bp->num_msgs < 2) {
75 wc_printf(_("%d comments"), 0);
79 wc_printf("<a name=\"comments\"></a>\n");
80 wc_printf(_("%d comments"), bp->num_msgs - 1);
81 wc_printf(" | <a href=\"");
82 tmplput_blog_permalink(NULL, NULL);
83 wc_printf("\">%s</a>", _("permalink"));
85 for (i=1; i<bp->num_msgs; ++i) {
86 read_message(WC->WBuf, HKEY("view_blog_comment"), bp->msgs[i], NULL, &Mime);
90 /* offer the comment box */
92 do_template("blog_comment_box");
99 * Destructor for "struct blogpost"
101 void blogpost_destroy(struct blogpost *bp) {
102 if (bp->alloc_msgs > 0) {
110 * Entry point for message read operations.
112 int blogview_GetParamsGetServerCall(SharedMessageStatus *Stat,
118 HashList *BLOG = NewHash(1, NULL);
119 *ViewSpecific = BLOG;
121 Stat->startmsg = (-1); /* not used here */
122 Stat->sortit = 1; /* not used here */
123 Stat->num_displayed = DEFAULT_MAXMSGS; /* not used here */
124 if (Stat->maxmsgs == 0) Stat->maxmsgs = DEFAULT_MAXMSGS;
126 /* perform a "read all" call to fetch the message list -- we'll cut it down later */
127 rlid[2].cmd(cmd, len);
134 * Given a msgnum, populate the id and refs fields of
135 * a "struct bltr" by fetching them from the Citadel server
137 struct bltr blogview_learn_thread_references(long msgnum)
142 struct bltr bltr = { 0, 0 } ;
145 serv_printf("MSG0 %ld|1", msgnum); /* top level citadel headers only */
146 StrBuf_ServGetln(Buf);
147 if (GetServerStatus(Buf, NULL) == 1) {
148 while (len = StrBuf_ServGetln(Buf),
150 ((len != 3) || strcmp(ChrPtr(Buf), "000") )))
152 if (!strncasecmp(ChrPtr(Buf), "msgn=", 5)) {
153 StrBufCutLeft(Buf, 5);
154 bltr.id = ThreadIdHash(Buf);
156 else if (!strncasecmp(ChrPtr(Buf), "wefw=", 5)) {
157 StrBufCutLeft(Buf, 5); /* trim the field name */
158 StrBufExtract_token(r, Buf, 0, '|');
159 bltr.refs = ThreadIdHash(r);
170 * This function is called for every message in the list.
172 int blogview_LoadMsgFromServer(SharedMessageStatus *Stat,
174 message_summary* Msg,
178 HashList *BLOG = (HashList *) *ViewSpecific;
180 struct blogpost *bp = NULL;
183 b = blogview_learn_thread_references(Msg->msgnum);
185 /* Stop processing if the viewer is only interested in a single post and
186 * that message ID is neither the id nor the refs.
188 p = atoi(BSTR("p")); /* are we looking for a specific post? */
189 if ((p != 0) && (p != b.id) && (p != b.refs)) {
194 * Add our little bundle of blogworthy wonderfulness to the hash table
197 bp = malloc(sizeof(struct blogpost));
198 if (!bp) return(200);
199 memset(bp, 0, sizeof (struct blogpost));
200 bp->top_level_id = b.id;
201 Put(BLOG, (const char *)&b.id, sizeof(b.id), bp, (DeleteHashDataFunc)blogpost_destroy);
204 GetHash(BLOG, (const char *)&b.refs , sizeof(b.refs), (void *)&bp);
208 * Now we have a 'struct blogpost' to which we can add a message. It's either the
209 * blog post itself or a comment attached to it; either way, the code is the same from
213 if (bp->alloc_msgs == 0) {
214 bp->alloc_msgs = 1000;
215 bp->msgs = malloc(bp->alloc_msgs * sizeof(long));
216 memset(bp->msgs, 0, (bp->alloc_msgs * sizeof(long)) );
218 if (bp->num_msgs >= bp->alloc_msgs) {
220 bp->msgs = realloc(bp->msgs, (bp->alloc_msgs * sizeof(long)));
221 memset(&bp->msgs[bp->num_msgs], 0,
222 ((bp->alloc_msgs - bp->num_msgs) * sizeof(long)) );
224 bp->msgs[bp->num_msgs++] = Msg->msgnum;
232 * Sort a list of 'struct blogpost' pointers by newest-to-oldest msgnum.
233 * With big thanks to whoever wrote http://www.c.happycodings.com/Sorting_Searching/code14.html
235 static int blogview_sortfunc(const void *a, const void *b) {
236 struct blogpost * const *one = a;
237 struct blogpost * const *two = b;
239 if ( (*one)->msgs[0] > (*two)->msgs[0] ) return(-1);
240 if ( (*one)->msgs[0] < (*two)->msgs[0] ) return(+1);
246 * All blogpost entries are now in the hash list.
247 * Sort them, select the desired range, and render what we want to see.
249 int blogview_render(SharedMessageStatus *Stat, void **ViewSpecific, long oper)
251 HashList *BLOG = (HashList *) *ViewSpecific;
257 struct blogpost **blogposts = NULL;
258 int num_blogposts = 0;
259 int num_blogposts_alloc = 0;
260 int with_comments = 0;
262 /* Comments are shown if we are only viewing a single blog post */
263 if (atoi(BSTR("p"))) with_comments = 1;
265 /* Iterate through the hash list and copy the data pointers into an array */
266 it = GetNewHashPos(BLOG, 0);
267 while (GetNextHashPos(BLOG, it, &len, &Key, &Data)) {
268 if (num_blogposts >= num_blogposts_alloc) {
269 if (num_blogposts_alloc == 0) {
270 num_blogposts_alloc = 100;
273 num_blogposts_alloc *= 2;
275 blogposts = realloc(blogposts, (num_blogposts_alloc * sizeof (struct blogpost *)));
277 blogposts[num_blogposts++] = (struct blogpost *) Data;
281 /* Now we have our array. It is ONLY an array of pointers. The objects to
282 * which they point are still owned by the hash list.
284 if (num_blogposts > 0) {
286 /* Sort newest-to-oldest */
287 qsort(blogposts, num_blogposts, sizeof(void *), blogview_sortfunc);
289 /* FIXME -- allow the user to select a starting point in the list */
291 /* FIXME -- allow the user (or a default setting) to select a maximum number of posts to display */
293 /* Now go through the list and render what we've got */
294 for (i=0; i<num_blogposts; ++i) {
295 blogpost_render(blogposts[i], with_comments);
298 /* Done. We are only freeing the array of pointers; the data itself
299 * will be freed along with the hash list.
308 int blogview_Cleanup(void **ViewSpecific)
310 HashList *BLOG = (HashList *) *ViewSpecific;
320 InitModule_BLOGVIEWRENDERERS
323 RegisterReadLoopHandlerset(
325 blogview_GetParamsGetServerCall,
328 blogview_LoadMsgFromServer,
332 RegisterNamespace("BLOG:PERMALINK", 0, 0, tmplput_blog_permalink, NULL, CTX_NONE);