--- lbbs/src/article_op.c	2025/11/04 13:49:51	1.2
+++ lbbs/src/article_op.c	2025/12/25 14:37:08	1.7
@@ -3,22 +3,268 @@
  * article_op
  *   - basic operations of articles
  *
- * Copyright (C) 2004-2025 by Leaflet <leaflet@leafok.com>
+ * Copyright (C) 2004-2025  Leaflet <leaflet@leafok.com>
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include "article_op.h"
 #include "bbs.h"
+#include "database.h"
 #include "io.h"
+#include "log.h"
 #include "screen.h"
+#include "user_priv.h"
+#include <stdlib.h>
 
 int display_article_meta(int32_t aid)
 {
 	clearscr();
 	moveto(3, 1);
-	prints("Web版 文章链接：");
+	prints("Web版 文章链接: ");
 	moveto(4, 1);
-	prints("http://%s/bbs/view_article.php?id=%d#%d", BBS_server, aid, aid);
+	prints("https://%s/bbs/view_article.php?id=%d#%d", BBS_server, aid, aid);
 	press_any_key();
 
 	return 0;
 }
+
+int article_excerption_set(SECTION_LIST *p_section, int32_t aid, int8_t set)
+{
+	MYSQL *db = NULL;
+	MYSQL_RES *rs = NULL;
+	MYSQL_ROW row;
+	char sql[SQL_BUFFER_LEN];
+	int ret = 0;
+	int uid = 0;
+	int tid = 0;
+	int sid = 0;
+	int8_t transship = 0;
+	int8_t excerption = 0;
+
+	if (p_section == NULL)
+	{
+		log_error("NULL pointer error");
+		ret = -1;
+		goto cleanup;
+	}
+
+	if (set)
+	{
+		set = 1;
+	}
+
+	db = db_open();
+	if (db == NULL)
+	{
+		log_error("db_open() error: %s", mysql_error(db));
+		ret = -1;
+		goto cleanup;
+	}
+
+	// Begin transaction
+	if (mysql_query(db, "SET autocommit=0") != 0)
+	{
+		log_error("SET autocommit=0 error: %s", mysql_error(db));
+		ret = -1;
+		goto cleanup;
+	}
+
+	if (mysql_query(db, "BEGIN") != 0)
+	{
+		log_error("Begin transaction error: %s", mysql_error(db));
+		ret = -1;
+		goto cleanup;
+	}
+
+	snprintf(sql, sizeof(sql),
+			 "SELECT UID, TID, SID, transship, excerption FROM bbs "
+			 "WHERE AID = %d AND visible FOR UPDATE",
+			 aid);
+	if (mysql_query(db, sql) != 0)
+	{
+		log_error("Query article error: %s", mysql_error(db));
+		ret = -2;
+		goto cleanup;
+	}
+
+	if ((rs = mysql_store_result(db)) == NULL)
+	{
+		log_error("Get article data failed");
+		ret = -2;
+		goto cleanup;
+	}
+
+	if ((row = mysql_fetch_row(rs)))
+	{
+		uid = atoi(row[0]);
+		tid = atoi(row[1]);
+		sid = atoi(row[2]);
+		transship = (int8_t)atoi(row[3]);
+		excerption = (int8_t)atoi(row[4]);
+	}
+	else
+	{
+		log_error("Article not found: aid=%d", aid);
+		ret = -2;
+		goto cleanup;
+	}
+	mysql_free_result(rs);
+	rs = NULL;
+
+	if (p_section->sid != sid)
+	{
+		log_error("Inconsistent SID of article (aid=%d): %d!=%d", aid, p_section->sid, sid);
+		ret = -2;
+		goto cleanup;
+	}
+
+	// Check if already set
+	if (excerption != set)
+	{
+		snprintf(sql, sizeof(sql),
+				 "UPDATE bbs SET excerption = %d WHERE AID = %d",
+				 set, aid);
+		if (mysql_query(db, sql) != 0)
+		{
+			log_error("Set excerption error: %s", mysql_error(db));
+			ret = -2;
+			goto cleanup;
+		}
+
+		// Clear gen_ex if unset excerption
+		if (set == 0)
+		{
+			snprintf(sql, sizeof(sql),
+					 "UPDATE bbs SET gen_ex = 0, static = 0 WHERE AID = %d OR TID = %d",
+					 aid, aid);
+
+			if (mysql_query(db, sql) != 0)
+			{
+				log_error("Set gen_ex error: %s", mysql_error(db));
+				ret = -2;
+				goto cleanup;
+			}
+
+			// Delete ex_dir path if head of thread
+			if (tid == 0)
+			{
+				snprintf(sql, sizeof(sql),
+						 "DELETE FROM ex_file WHERE AID = %d",
+						 aid);
+
+				if (mysql_query(db, sql) != 0)
+				{
+					log_error("Delete ex_file error: %s", mysql_error(db));
+					ret = -2;
+					goto cleanup;
+				}
+			}
+		}
+
+		// Change UID of attachments
+		snprintf(sql, sizeof(sql),
+				 "UPDATE upload_file SET UID = %d "
+				 "WHERE ref_AID = %d AND deleted = 0",
+				 (set ? 0 : uid), aid);
+		if (mysql_query(db, sql) != 0)
+		{
+			log_error("Set attachment status error: %s", mysql_error(db));
+			ret = -2;
+			goto cleanup;
+		}
+
+		// Modify exp
+		if (checkpriv(&BBS_priv, sid, S_GETEXP)) // Except in test section
+		{
+			snprintf(sql, sizeof(sql),
+					 "UPDATE user_pubinfo SET exp = exp + %d WHERE UID = %d",
+					 (set ? 1 : -1) * (tid == 0 ? (transship ? 20 : 50) : 10), uid);
+
+			if (mysql_query(db, sql) != 0)
+			{
+				log_error("Change exp error: %s", mysql_error(db));
+				ret = -2;
+				goto cleanup;
+			}
+		}
+
+		// Add log
+		snprintf(sql, sizeof(sql),
+				 "INSERT INTO bbs_article_op(AID, UID, type, op_dt, op_ip) "
+				 "VALUES(%d, %d, '%c', NOW(), '%s')",
+				 aid, BBS_priv.uid, (set ? 'E' : 'O'), hostaddr_client);
+
+		if (mysql_query(db, sql) != 0)
+		{
+			log_error("Add log error: %s", mysql_error(db));
+			ret = -2;
+			goto cleanup;
+		}
+	}
+
+	if (section_list_rw_lock(p_section) < 0)
+	{
+		log_error("section_list_rw_lock(sid=%d) error", sid);
+		ret = -3;
+		goto cleanup;
+	}
+
+	ret = section_list_set_article_excerption(p_section, aid, set);
+	if (ret < 0)
+	{
+		log_error("section_list_set_article_excerption(sid=%d, aid=%d, set=%d) error", sid, aid, set);
+		ret = -3;
+		goto cleanup;
+	}
+
+	if (section_list_rw_unlock(p_section) < 0)
+	{
+		log_error("section_list_rw_unlock(sid=%d) error", sid);
+		ret = -3;
+		goto cleanup;
+	}
+
+	// Commit transaction
+	if (mysql_query(db, "COMMIT") != 0)
+	{
+		log_error("Mysqli error: %s", mysql_error(db));
+
+		// Rollback change to avoid data inconsistency
+		if (section_list_rw_lock(p_section) < 0)
+		{
+			log_error("section_list_rw_lock(sid=%d) error", sid);
+			ret = -3;
+			goto cleanup;
+		}
+
+		ret = section_list_set_article_excerption(p_section, aid, excerption);
+		if (ret < 0)
+		{
+			log_error("section_list_set_article_excerption(sid=%d, aid=%d, set=%d) error", sid, aid, excerption);
+			ret = -3;
+			goto cleanup;
+		}
+
+		if (section_list_rw_unlock(p_section) < 0)
+		{
+			log_error("section_list_rw_unlock(sid=%d) error", sid);
+			ret = -3;
+			goto cleanup;
+		}
+
+		ret = 0;
+	}
+	else
+	{
+		ret = 1; // Success
+	}
+
+cleanup:
+	mysql_free_result(rs);
+	mysql_close(db);
+
+	return ret;
+}