Book search

db_book.c

@@ -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;
+}

extern.h

@@ -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);