Book search

This commit is contained in:
Meutel 2017-01-14 12:15:21 +01:00
parent dca5b43600
commit f2b45370b5
2 changed files with 53 additions and 0 deletions

View File

@ -37,6 +37,11 @@
#define STMT_BOOKS_AUTHORS0 "SELECT authors.id, authors.name, books_authors_link.book as book "\
"FROM authors, books_authors_link WHERE books_authors_link.author = authors.id "\
"AND books_authors_link.book IN ( SELECT id FROM books "
#define STMT_WHERE " WHERE "
#define STMT_SEARCH_TERM " books.sort like ? "
#define STMT_BOOL_AND " AND "
#define STMT_BOOL_OR " OR "
#define STMT_SEARCH_ORDER " ORDER BY books.sort"
enum stmt {
STMT_BOOKS_COUNT,
@ -521,3 +526,50 @@ db_book_load(struct kreq *r, int64_t id)
return book;
}
int
db_books_search(struct kreq *r, int limit, Book** books, char **terms, int num, int all)
{
if (limit < 0) {
return 0;
}
struct ksqlstmt *stmt;
int i, count = 0;
size_t sqlsz = sizeof(STMT_BOOKS0)
+ sizeof(STMT_WHERE)
+ num * sizeof(STMT_SEARCH_TERM)
+ (num-1) * sizeof(STMT_BOOL_AND)
+ sizeof(STMT_SEARCH_ORDER);
char *sql = kcalloc(sqlsz, sizeof(char));
strlcat(sql, STMT_BOOKS0, sqlsz);
strlcat(sql, STMT_WHERE, sqlsz);
for (i=0; i<num; i++) {
strlcat(sql, STMT_SEARCH_TERM, sqlsz);
if (i<num-1 && all)
strlcat(sql, STMT_BOOL_AND, sqlsz);
if (i<num-1 && !all)
strlcat(sql, STMT_BOOL_OR, sqlsz);
}
strlcat(sql, STMT_SEARCH_ORDER, sqlsz);
ksql_stmt_alloc(r->arg, &stmt, sql, 0);
for (i=0; i<num; i++) {
size_t sz = 3 + strlen(terms[i]);
char *term = kcalloc(sz, sizeof(char));
strlcat(term, "\%", sz);
strlcat(term, terms[i], sz);
strlcat(term, "\%", sz);
ksql_bind_str(stmt, i, term);
}
while (KSQL_ROW == ksql_stmt_step(stmt)) {
if (count < limit) {
books[count] = kcalloc(1, sizeof(Book));
db_book_fill(books[count],stmt);
}
count++;
}
ksql_stmt_free(stmt);
return count;
}

View File

@ -145,6 +145,7 @@ struct bookdata {
__BEGIN_DECLS
int db_books_search(struct kreq *r, int limit, Book** books, char **terms, int num, int all);
BookFull *db_book_load(struct kreq *r, int64_t id);
int db_books_load(struct kreq *r, BookAdv **books, const char *sort, const char *order, int limit, int offset);
int db_books_count(struct kreq *r);