lbbs/src/article_view_log.c

/***************************************************************************
                                         article_view_log.c  -  description
                                                         -------------------
        Copyright            : (C) 2004-2025 by Leaflet
        Email                : leaflet@leafok.com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "article_view_log.h"
#include "common.h"
#include "database.h"
#include "log.h"
#include <stdlib.h>
#include <string.h>

ARTICLE_VIEW_LOG BBS_article_view_log;

int article_view_log_load(int uid, ARTICLE_VIEW_LOG *p_view_log, int keep_inc)
{
        MYSQL *db;
        MYSQL_RES *rs;
        MYSQL_ROW row;
        char sql[SQL_BUFFER_LEN];

        if (p_view_log == NULL)
        {
                log_error("NULL pointer error\n");
                return -1;
        }

        p_view_log->uid = uid;

        if (uid == 0)
        {
                p_view_log->aid_base_cnt = 0;
                p_view_log->aid_base = NULL;

                if (!keep_inc)
                {
                        p_view_log->aid_inc_cnt = 0;
                }

                return 0;
        }

        if ((db = db_open()) == NULL)
        {
                log_error("article_view_log_load() error: Unable to open DB\n");
                return -2;
        }

        snprintf(sql, sizeof(sql),
                         "SELECT AID FROM view_article_log WHERE UID = %d "
                         "ORDER BY AID",
                         uid);
        if (mysql_query(db, sql) != 0)
        {
                log_error("Query view_article_log error: %s\n", mysql_error(db));
                return -3;
        }
        if ((rs = mysql_store_result(db)) == NULL)
        {
                log_error("Get view_article_log data failed\n");
                return -3;
        }

        p_view_log->aid_base_cnt = 0;
        p_view_log->aid_base = malloc(sizeof(int32_t) * mysql_num_rows(rs));
        if (p_view_log->aid_base == NULL)
        {
                log_error("malloc(INT32 * %d) error: OOM\n", mysql_num_rows(rs));
                mysql_free_result(rs);
                mysql_close(db);
                return -4;
        }

        while ((row = mysql_fetch_row(rs)))
        {
                p_view_log->aid_base[(p_view_log->aid_base_cnt)++] = atoi(row[0]);
        }
        mysql_free_result(rs);

        mysql_close(db);

        log_common("Loaded %d view_article_log records for uid=%d\n", p_view_log->aid_base_cnt, uid);

        if (!keep_inc)
        {
                p_view_log->aid_inc_cnt = 0;
        }

        return 0;
}

int article_view_log_unload(ARTICLE_VIEW_LOG *p_view_log)
{
        if (p_view_log == NULL)
        {
                log_error("NULL pointer error\n");
                return -1;
        }

        if (p_view_log->aid_base != NULL)
        {
                free(p_view_log->aid_base);
                p_view_log->aid_base = NULL;
                p_view_log->aid_base_cnt = 0;
        }

        return 0;
}

int article_view_log_save_inc(const ARTICLE_VIEW_LOG *p_view_log)
{
        MYSQL *db = NULL;
        char sql[SQL_BUFFER_LEN];
        char tuple_tmp[LINE_BUFFER_LEN];
        int i;
        int affected_record = 0;

        if (p_view_log == NULL)
        {
                log_error("NULL pointer error\n");
                return -1;
        }

        if (p_view_log->uid <= 0 || p_view_log->aid_inc_cnt == 0)
        {
                return 0;
        }

        if ((db = db_open()) == NULL)
        {
                log_error("article_view_log_load() error: Unable to open DB\n");
                return -2;
        }

        snprintf(sql, sizeof(sql),
                         "INSERT IGNORE INTO view_article_log(AID, UID, dt) VALUES ");

        for (i = 0; i < p_view_log->aid_inc_cnt; i++)
        {
                snprintf(tuple_tmp, sizeof(tuple_tmp),
                                 "(%d, %d, NOW())",
                                 p_view_log->aid_inc[i], p_view_log->uid);
                strncat(sql, tuple_tmp, sizeof(sql) - 1 - strnlen(sql, sizeof(sql)));

                if ((i + 1) % 100 == 0 || (i + 1) == p_view_log->aid_inc_cnt) // Insert 100 records per query
                {
                        if (mysql_query(db, sql) != 0)
                        {
                                log_error("Add view_article_log error: %s\n", mysql_error(db));
                                mysql_close(db);
                                return -3;
                        }

                        affected_record += (int)mysql_affected_rows(db);

                        snprintf(sql, sizeof(sql),
                                         "INSERT IGNORE INTO view_article_log(AID, UID, dt) VALUES ");
                }
                else
                {
                        strncat(sql, ", ", sizeof(sql) - 1 - strnlen(sql, sizeof(sql)));
                }
        }

        log_common("Saved %d view_article_log records for uid=%d\n", affected_record, p_view_log->uid);

        mysql_close(db);

        return 0;
}

int article_view_log_merge_inc(ARTICLE_VIEW_LOG *p_view_log)
{
        int32_t *aid_new;
        int aid_new_cnt;
        int i, j, k;

        if (p_view_log == NULL)
        {
                log_error("NULL pointer error\n");
                return -1;
        }

        if (p_view_log->aid_inc_cnt == 0) // Nothing to be merged
        {
                return 0;
        }

        aid_new_cnt = p_view_log->aid_base_cnt + p_view_log->aid_inc_cnt;

        aid_new = malloc(sizeof(int32_t) * (size_t)aid_new_cnt);
        if (aid_new == NULL)
        {
                log_error("malloc(INT32 * %d) error: OOM\n", aid_new_cnt);
                return -2;
        }

        for (i = 0, j = 0, k = 0; i < p_view_log->aid_base_cnt && j < p_view_log->aid_inc_cnt;)
        {
                if (p_view_log->aid_base[i] <= p_view_log->aid_inc[j])
                {
                        if (p_view_log->aid_base[i] == p_view_log->aid_inc[j])
                        {
                                log_error("Duplicate aid = %d found in both Base (offset = %d) and Inc (offset = %d)\n",
                                                  p_view_log->aid_base[i], i, j);
                                j++; // Skip duplicate one in Inc
                        }

                        aid_new[k++] = p_view_log->aid_base[i++];
                }
                else if (p_view_log->aid_base[i] > p_view_log->aid_inc[j])
                {
                        aid_new[k++] = p_view_log->aid_inc[j++];
                }
        }

        memcpy(aid_new + k, p_view_log->aid_base + i, sizeof(int32_t) * (size_t)(p_view_log->aid_base_cnt - i));
        k += (p_view_log->aid_base_cnt - i);
        memcpy(aid_new + k, p_view_log->aid_inc + j, sizeof(int32_t) * (size_t)(p_view_log->aid_inc_cnt - j));
        k += (p_view_log->aid_inc_cnt - j);

        free(p_view_log->aid_base);
        p_view_log->aid_base = aid_new;
        p_view_log->aid_base_cnt = k;

        p_view_log->aid_inc_cnt = 0;

        return 0;
}

int article_view_log_is_viewed(int32_t aid, const ARTICLE_VIEW_LOG *p_view_log)
{
        int left;
        int right;
        int mid;
        int i;

        if (p_view_log == NULL)
        {
                log_error("NULL pointer error\n");
                return -1;
        }

        for (i = 0; i < 2; i++)
        {
                left = 0;
                right = (i == 0 ? p_view_log->aid_base_cnt : p_view_log->aid_inc_cnt) - 1;

                if (right < 0)
                {
                        continue;
                }

                while (left < right)
                {
                        mid = (left + right) / 2;
                        if (aid < (i == 0 ? p_view_log->aid_base[mid] : p_view_log->aid_inc[mid]))
                        {
                                right = mid;
                        }
                        else if (aid > (i == 0 ? p_view_log->aid_base[mid] : p_view_log->aid_inc[mid]))
                        {
                                left = mid + 1;
                        }
                        else // if (aid == p_view_log->aid_base[mid])
                        {
                                return 1;
                        }
                }

                if (aid == (i == 0 ? p_view_log->aid_base[left] : p_view_log->aid_inc[left])) // Found
                {
                        return 1;
                }
        }

        return 0;
}

int article_view_log_set_viewed(int32_t aid, ARTICLE_VIEW_LOG *p_view_log)
{
        int left;
        int right;
        int mid;
        int i;

        if (p_view_log == NULL)
        {
                log_error("NULL pointer error\n");
                return -1;
        }

        for (i = 0; i < 2; i++)
        {
                left = 0;
                right = (i == 0 ? p_view_log->aid_base_cnt : p_view_log->aid_inc_cnt) - 1;

                if (right < 0)
                {
                        continue;
                }

                while (left < right)
                {
                        mid = (left + right) / 2;
                        if (aid < (i == 0 ? p_view_log->aid_base[mid] : p_view_log->aid_inc[mid]))
                        {
                                right = mid;
                        }
                        else if (aid > (i == 0 ? p_view_log->aid_base[mid] : p_view_log->aid_inc[mid]))
                        {
                                left = mid + 1;
                        }
                        else // if (aid == p_view_log->aid_base[mid])
                        {
                                return 0; // Already set
                        }
                }

                if (aid == (i == 0 ? p_view_log->aid_base[left] : p_view_log->aid_inc[left])) // Found
                {
                        return 0; // Already set
                }
        }

        // Merge if Inc is full
        if (p_view_log->aid_inc_cnt >= MAX_VIEWED_AID_INC_CNT)
        {
                // Save incremental article view log
                if (article_view_log_save_inc(p_view_log) < 0)
                {
                        log_error("article_view_log_save_inc() error\n");
                        return -2;
                }

                article_view_log_merge_inc(p_view_log);

                p_view_log->aid_inc[(p_view_log->aid_inc_cnt)++] = aid;

                return 1; // Set complete
        }

        if (right < 0)
        {
                right = 0;
        }
        else if (aid > p_view_log->aid_inc[left])
        {
                right = left + 1;
        }

        for (i = p_view_log->aid_inc_cnt - 1; i >= right; i--)
        {
                p_view_log->aid_inc[i + 1] = p_view_log->aid_inc[i];
        }

        p_view_log->aid_inc[right] = aid;
        (p_view_log->aid_inc_cnt)++;

        return 1; // Set complete
}
1	/***************************************************************************
2	article_view_log.c - description
3	-------------------
4	Copyright : (C) 2004-2025 by Leaflet
5	Email : leaflet@leafok.com
6	***************************************************************************/
7
8	/***************************************************************************
9	* *
10	* This program is free software; you can redistribute it and/or modify *
11	* it under the terms of the GNU General Public License as published by *
12	* the Free Software Foundation; either version 3 of the License, or *
13	* (at your option) any later version. *
14	* *
15	***************************************************************************/
16
17	#include "article_view_log.h"
18	#include "common.h"
19	#include "database.h"
20	#include "log.h"
21	#include <stdlib.h>
22	#include <string.h>
23
24	ARTICLE_VIEW_LOG BBS_article_view_log;
25
26	int article_view_log_load(int uid, ARTICLE_VIEW_LOG *p_view_log, int keep_inc)
27	{
28	MYSQL *db;
29	MYSQL_RES *rs;
30	MYSQL_ROW row;
31	char sql[SQL_BUFFER_LEN];
32
33	if (p_view_log == NULL)
34	{
35	log_error("NULL pointer error\n");
36	return -1;
37	}
38
39	p_view_log->uid = uid;
40
41	if (uid == 0)
42	{
43	p_view_log->aid_base_cnt = 0;
44	p_view_log->aid_base = NULL;
45
46	if (!keep_inc)
47	{
48	p_view_log->aid_inc_cnt = 0;
49	}
50
51	return 0;
52	}
53
54	if ((db = db_open()) == NULL)
55	{
56	log_error("article_view_log_load() error: Unable to open DB\n");
57	return -2;
58	}
59
60	snprintf(sql, sizeof(sql),
61	"SELECT AID FROM view_article_log WHERE UID = %d "
62	"ORDER BY AID",
63	uid);
64	if (mysql_query(db, sql) != 0)
65	{
66	log_error("Query view_article_log error: %s\n", mysql_error(db));
67	return -3;
68	}
69	if ((rs = mysql_store_result(db)) == NULL)
70	{
71	log_error("Get view_article_log data failed\n");
72	return -3;
73	}
74
75	p_view_log->aid_base_cnt = 0;
76	p_view_log->aid_base = malloc(sizeof(int32_t) * mysql_num_rows(rs));
77	if (p_view_log->aid_base == NULL)
78	{
79	log_error("malloc(INT32 * %d) error: OOM\n", mysql_num_rows(rs));
80	mysql_free_result(rs);
81	mysql_close(db);
82	return -4;
83	}
84
85	while ((row = mysql_fetch_row(rs)))
86	{
87	p_view_log->aid_base[(p_view_log->aid_base_cnt)++] = atoi(row[0]);
88	}
89	mysql_free_result(rs);
90
91	mysql_close(db);
92
93	log_common("Loaded %d view_article_log records for uid=%d\n", p_view_log->aid_base_cnt, uid);
94
95	if (!keep_inc)
96	{
97	p_view_log->aid_inc_cnt = 0;
98	}
99
100	return 0;
101	}
102
103	int article_view_log_unload(ARTICLE_VIEW_LOG *p_view_log)
104	{
105	if (p_view_log == NULL)
106	{
107	log_error("NULL pointer error\n");
108	return -1;
109	}
110
111	if (p_view_log->aid_base != NULL)
112	{
113	free(p_view_log->aid_base);
114	p_view_log->aid_base = NULL;
115	p_view_log->aid_base_cnt = 0;
116	}
117
118	return 0;
119	}
120
121	int article_view_log_save_inc(const ARTICLE_VIEW_LOG *p_view_log)
122	{
123	MYSQL *db = NULL;
124	char sql[SQL_BUFFER_LEN];
125	char tuple_tmp[LINE_BUFFER_LEN];
126	int i;
127	int affected_record = 0;
128
129	if (p_view_log == NULL)
130	{
131	log_error("NULL pointer error\n");
132	return -1;
133	}
134
135	if (p_view_log->uid <= 0 \|\| p_view_log->aid_inc_cnt == 0)
136	{
137	return 0;
138	}
139
140	if ((db = db_open()) == NULL)
141	{
142	log_error("article_view_log_load() error: Unable to open DB\n");
143	return -2;
144	}
145
146	snprintf(sql, sizeof(sql),
147	"INSERT IGNORE INTO view_article_log(AID, UID, dt) VALUES ");
148
149	for (i = 0; i < p_view_log->aid_inc_cnt; i++)
150	{
151	snprintf(tuple_tmp, sizeof(tuple_tmp),
152	"(%d, %d, NOW())",
153	p_view_log->aid_inc[i], p_view_log->uid);
154	strncat(sql, tuple_tmp, sizeof(sql) - 1 - strnlen(sql, sizeof(sql)));
155
156	if ((i + 1) % 100 == 0 \|\| (i + 1) == p_view_log->aid_inc_cnt) // Insert 100 records per query
157	{
158	if (mysql_query(db, sql) != 0)
159	{
160	log_error("Add view_article_log error: %s\n", mysql_error(db));
161	mysql_close(db);
162	return -3;
163	}
164
165	affected_record += (int)mysql_affected_rows(db);
166
167	snprintf(sql, sizeof(sql),
168	"INSERT IGNORE INTO view_article_log(AID, UID, dt) VALUES ");
169	}
170	else
171	{
172	strncat(sql, ", ", sizeof(sql) - 1 - strnlen(sql, sizeof(sql)));
173	}
174	}
175
176	log_common("Saved %d view_article_log records for uid=%d\n", affected_record, p_view_log->uid);
177
178	mysql_close(db);
179
180	return 0;
181	}
182
183	int article_view_log_merge_inc(ARTICLE_VIEW_LOG *p_view_log)
184	{
185	int32_t *aid_new;
186	int aid_new_cnt;
187	int i, j, k;
188
189	if (p_view_log == NULL)
190	{
191	log_error("NULL pointer error\n");
192	return -1;
193	}
194
195	if (p_view_log->aid_inc_cnt == 0) // Nothing to be merged
196	{
197	return 0;
198	}
199
200	aid_new_cnt = p_view_log->aid_base_cnt + p_view_log->aid_inc_cnt;
201
202	aid_new = malloc(sizeof(int32_t) * (size_t)aid_new_cnt);
203	if (aid_new == NULL)
204	{
205	log_error("malloc(INT32 * %d) error: OOM\n", aid_new_cnt);
206	return -2;
207	}
208
209	for (i = 0, j = 0, k = 0; i < p_view_log->aid_base_cnt && j < p_view_log->aid_inc_cnt;)
210	{
211	if (p_view_log->aid_base[i] <= p_view_log->aid_inc[j])
212	{
213	if (p_view_log->aid_base[i] == p_view_log->aid_inc[j])
214	{
215	log_error("Duplicate aid = %d found in both Base (offset = %d) and Inc (offset = %d)\n",
216	p_view_log->aid_base[i], i, j);
217	j++; // Skip duplicate one in Inc
218	}
219
220	aid_new[k++] = p_view_log->aid_base[i++];
221	}
222	else if (p_view_log->aid_base[i] > p_view_log->aid_inc[j])
223	{
224	aid_new[k++] = p_view_log->aid_inc[j++];
225	}
226	}
227
228	memcpy(aid_new + k, p_view_log->aid_base + i, sizeof(int32_t) * (size_t)(p_view_log->aid_base_cnt - i));
229	k += (p_view_log->aid_base_cnt - i);
230	memcpy(aid_new + k, p_view_log->aid_inc + j, sizeof(int32_t) * (size_t)(p_view_log->aid_inc_cnt - j));
231	k += (p_view_log->aid_inc_cnt - j);
232
233	free(p_view_log->aid_base);
234	p_view_log->aid_base = aid_new;
235	p_view_log->aid_base_cnt = k;
236
237	p_view_log->aid_inc_cnt = 0;
238
239	return 0;
240	}
241
242	int article_view_log_is_viewed(int32_t aid, const ARTICLE_VIEW_LOG *p_view_log)
243	{
244	int left;
245	int right;
246	int mid;
247	int i;
248
249	if (p_view_log == NULL)
250	{
251	log_error("NULL pointer error\n");
252	return -1;
253	}
254
255	for (i = 0; i < 2; i++)
256	{
257	left = 0;
258	right = (i == 0 ? p_view_log->aid_base_cnt : p_view_log->aid_inc_cnt) - 1;
259
260	if (right < 0)
261	{
262	continue;
263	}
264
265	while (left < right)
266	{
267	mid = (left + right) / 2;
268	if (aid < (i == 0 ? p_view_log->aid_base[mid] : p_view_log->aid_inc[mid]))
269	{
270	right = mid;
271	}
272	else if (aid > (i == 0 ? p_view_log->aid_base[mid] : p_view_log->aid_inc[mid]))
273	{
274	left = mid + 1;
275	}
276	else // if (aid == p_view_log->aid_base[mid])
277	{
278	return 1;
279	}
280	}
281
282	if (aid == (i == 0 ? p_view_log->aid_base[left] : p_view_log->aid_inc[left])) // Found
283	{
284	return 1;
285	}
286	}
287
288	return 0;
289	}
290
291	int article_view_log_set_viewed(int32_t aid, ARTICLE_VIEW_LOG *p_view_log)
292	{
293	int left;
294	int right;
295	int mid;
296	int i;
297
298	if (p_view_log == NULL)
299	{
300	log_error("NULL pointer error\n");
301	return -1;
302	}
303
304	for (i = 0; i < 2; i++)
305	{
306	left = 0;
307	right = (i == 0 ? p_view_log->aid_base_cnt : p_view_log->aid_inc_cnt) - 1;
308
309	if (right < 0)
310	{
311	continue;
312	}
313
314	while (left < right)
315	{
316	mid = (left + right) / 2;
317	if (aid < (i == 0 ? p_view_log->aid_base[mid] : p_view_log->aid_inc[mid]))
318	{
319	right = mid;
320	}
321	else if (aid > (i == 0 ? p_view_log->aid_base[mid] : p_view_log->aid_inc[mid]))
322	{
323	left = mid + 1;
324	}
325	else // if (aid == p_view_log->aid_base[mid])
326	{
327	return 0; // Already set
328	}
329	}
330
331	if (aid == (i == 0 ? p_view_log->aid_base[left] : p_view_log->aid_inc[left])) // Found
332	{
333	return 0; // Already set
334	}
335	}
336
337	// Merge if Inc is full
338	if (p_view_log->aid_inc_cnt >= MAX_VIEWED_AID_INC_CNT)
339	{
340	// Save incremental article view log
341	if (article_view_log_save_inc(p_view_log) < 0)
342	{
343	log_error("article_view_log_save_inc() error\n");
344	return -2;
345	}
346
347	article_view_log_merge_inc(p_view_log);
348
349	p_view_log->aid_inc[(p_view_log->aid_inc_cnt)++] = aid;
350
351	return 1; // Set complete
352	}
353
354	if (right < 0)
355	{
356	right = 0;
357	}
358	else if (aid > p_view_log->aid_inc[left])
359	{
360	right = left + 1;
361	}
362
363	for (i = p_view_log->aid_inc_cnt - 1; i >= right; i--)
364	{
365	p_view_log->aid_inc[i + 1] = p_view_log->aid_inc[i];
366	}
367
368	p_view_log->aid_inc[right] = aid;
369	(p_view_log->aid_inc_cnt)++;
370
371	return 1; // Set complete
372	}
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