Book search
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52
db_book.c
52
db_book.c
@ -37,6 +37,11 @@
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#define STMT_BOOKS_AUTHORS0 "SELECT authors.id, authors.name, books_authors_link.book as book "\
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"FROM authors, books_authors_link WHERE books_authors_link.author = authors.id "\
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"AND books_authors_link.book IN ( SELECT id FROM books "
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#define STMT_WHERE " WHERE "
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#define STMT_SEARCH_TERM " books.sort like ? "
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#define STMT_BOOL_AND " AND "
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#define STMT_BOOL_OR " OR "
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#define STMT_SEARCH_ORDER " ORDER BY books.sort"
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enum stmt {
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STMT_BOOKS_COUNT,
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@ -521,3 +526,50 @@ db_book_load(struct kreq *r, int64_t id)
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return book;
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}
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int
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db_books_search(struct kreq *r, int limit, Book** books, char **terms, int num, int all)
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{
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if (limit < 0) {
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return 0;
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}
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struct ksqlstmt *stmt;
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int i, count = 0;
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size_t sqlsz = sizeof(STMT_BOOKS0)
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+ sizeof(STMT_WHERE)
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+ num * sizeof(STMT_SEARCH_TERM)
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+ (num-1) * sizeof(STMT_BOOL_AND)
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+ sizeof(STMT_SEARCH_ORDER);
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char *sql = kcalloc(sqlsz, sizeof(char));
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strlcat(sql, STMT_BOOKS0, sqlsz);
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strlcat(sql, STMT_WHERE, sqlsz);
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for (i=0; i<num; i++) {
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strlcat(sql, STMT_SEARCH_TERM, sqlsz);
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if (i<num-1 && all)
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strlcat(sql, STMT_BOOL_AND, sqlsz);
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if (i<num-1 && !all)
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strlcat(sql, STMT_BOOL_OR, sqlsz);
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}
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strlcat(sql, STMT_SEARCH_ORDER, sqlsz);
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ksql_stmt_alloc(r->arg, &stmt, sql, 0);
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for (i=0; i<num; i++) {
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size_t sz = 3 + strlen(terms[i]);
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char *term = kcalloc(sz, sizeof(char));
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strlcat(term, "\%", sz);
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strlcat(term, terms[i], sz);
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strlcat(term, "\%", sz);
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ksql_bind_str(stmt, i, term);
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}
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while (KSQL_ROW == ksql_stmt_step(stmt)) {
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if (count < limit) {
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books[count] = kcalloc(1, sizeof(Book));
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db_book_fill(books[count],stmt);
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}
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count++;
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}
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ksql_stmt_free(stmt);
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return count;
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}
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1
extern.h
1
extern.h
@ -145,6 +145,7 @@ struct bookdata {
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__BEGIN_DECLS
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int db_books_search(struct kreq *r, int limit, Book** books, char **terms, int num, int all);
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BookFull *db_book_load(struct kreq *r, int64_t id);
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int db_books_load(struct kreq *r, BookAdv **books, const char *sort, const char *order, int limit, int offset);
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int db_books_count(struct kreq *r);
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