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Load book tags

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Meutel 2017-01-03 19:14:19 +01:00
parent 23b36febff
commit 24b6ca74ee
2 changed files with 133 additions and 21 deletions
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151
db.c
View File

@ -30,10 +30,12 @@
enum stmt {
STMT_BOOK,
STMT_BOOK_TAGS,
STMT_BOOK_AUTHORS,
STMT_BOOK_DATA,
STMT_BOOKS,
STMT_BOOKS_COUNT,
STMT_BOOKS_TAGS,
STMT_BOOKS_AUTHORS,
STMT__MAX
};
@ -51,6 +53,8 @@ static const char *const stmts[STMT__MAX] = {
LEFT OUTER JOIN books_publishers_link ON books.id = books_publishers_link.book \
LEFT OUTER JOIN publishers ON publishers.id = books_publishers_link.publisher \
WHERE books.id = ?",
/* STMT_BOOK_TAGS */
"SELECT name FROM tags, books_tags_link WHERE tags.id = books_tags_link.tag AND books_tags_link.book = ?",
/* STMT_BOOK_AUTHORS */
"SELECT authors.id, authors.name, books_authors_link.book as book \
FROM authors, books_authors_link WHERE books_authors_link.author = authors.id \
@ -64,6 +68,10 @@ static const char *const stmts[STMT__MAX] = {
LEFT OUTER JOIN series ON series.id = books_series_link.series ORDER BY id LIMIT ? OFFSET ?",
/* STMT_BOOKS_COUNT */
"SELECT count(id) FROM books",
/* STMT_BOOKS_TAGS */
"SELECT name, books_tags_link.book as book FROM tags, books_tags_link \
WHERE tags.id = books_tags_link.tag AND books_tags_link.book \
IN ( SELECT id FROM books ORDER BY id LIMIT ? OFFSET ?)",
/* STMT_BOOKS_AUTHORS */
"SELECT authors.id, authors.name, books_authors_link.book as book \
FROM authors, books_authors_link WHERE books_authors_link.author = authors.id \
@ -79,6 +87,15 @@ struct bookauth {
struct bookauth *p;
};
/*
* Linked list tags of book.
*/
struct booktag {
char *tag;
BookAdv *b;
struct booktag *p;
};
/*
* Linked list book data.
*/
@ -147,10 +164,15 @@ db_book_adv_free(BookAdv *p)
{
if (NULL == p)
return;
size_t i;
db_book_unfill(&p->b);
for (size_t i = 0; i < p->asize; i++) {
for (i = 0; i < p->asize; i++) {
db_author_unfill(p->a[i]);
}
for (i = 0; i < p->tsize; i++) {
free(p->tags[i]);
}
free(p);
}
@ -215,6 +237,26 @@ db_books_count(struct kreq *r)
return(count);
}
static void
db_assign_book_tags(struct booktag *list)
{
struct booktag *item = NULL;
struct booktag *p = NULL;
p = list;
while (NULL != p) {
if (NULL != p->b && NULL == p->b->tags && p->b->tsize > 0) {
p->b->tags = kcalloc(p->b->tsize, sizeof(char));
p->b->tsize = 0; // use as counter for insert
}
p->b->tags[p->b->tsize] = p->tag;
p->b->tsize++;
item = p;
p = p->p;
free(item);
}
}
static void
db_assign_book_authors(struct bookauth *list)
{
@ -235,31 +277,45 @@ db_assign_book_authors(struct bookauth *list)
}
}
int
db_books_load(struct kreq *r, BookAdv **books, int limit, int offset)
static struct booktag *
db_load_books_tags(struct kreq *r, BookAdv **books, int count, int limit, int offset)
{
if (limit < 0 || offset < 0) {
return 0;
}
struct ksqlstmt *stmt;
struct bookauth *p = NULL;
struct bookauth *item = NULL;
int i, count = 0;
struct booktag *p = NULL;
struct booktag *item = NULL;
int i;
int64_t bid;
ksql_stmt_alloc(r->arg, &stmt,
stmts[STMT_BOOKS],
STMT_BOOKS);
stmts[STMT_BOOKS_TAGS],
STMT_BOOKS_TAGS);
ksql_bind_int(stmt, 0, limit);
ksql_bind_int(stmt, 1, offset);
while (KSQL_ROW == ksql_stmt_step(stmt)) {
books[count] = kcalloc(1, sizeof(BookAdv));
db_book_fill(&books[count]->b,stmt);
books[count]->asize = 0;
count++;
item = kcalloc(1, sizeof(struct booktag));
item->tag = kstrdup(ksql_stmt_str(stmt, 0));
bid = ksql_stmt_int(stmt, 1);
for (i = 0; i < count && NULL == item->b; i++) {
if (books[i]->b.id == bid) {
item->b = books[i];
item->b->tsize++;
}
}
item->p = p;
p = item;
}
ksql_stmt_free(stmt);
return p;
}
static struct bookauth *
db_load_books_authors(struct kreq *r, BookAdv **books, int count, int limit, int offset)
{
struct ksqlstmt *stmt;
struct bookauth *p = NULL;
struct bookauth *item = NULL;
int i;
int64_t bid;
ksql_stmt_alloc(r->arg, &stmt,
stmts[STMT_BOOKS_AUTHORS],
@ -282,15 +338,69 @@ db_books_load(struct kreq *r, BookAdv **books, int limit, int offset)
item->p = p;
p = item;
}
ksql_stmt_free(stmt);
return p;
}
// assign authors to books
db_assign_book_authors(p);
int
db_books_load(struct kreq *r, BookAdv **books, int limit, int offset)
{
if (limit < 0 || offset < 0) {
return 0;
}
struct ksqlstmt *stmt;
struct bookauth *p_a;
struct booktag *p_t;
int count = 0;
ksql_stmt_alloc(r->arg, &stmt,
stmts[STMT_BOOKS],
STMT_BOOKS);
ksql_bind_int(stmt, 0, limit);
ksql_bind_int(stmt, 1, offset);
while (KSQL_ROW == ksql_stmt_step(stmt)) {
books[count] = kcalloc(1, sizeof(BookAdv));
db_book_fill(&books[count]->b,stmt);
books[count]->asize = 0;
count++;
}
ksql_stmt_free(stmt);
p_a = db_load_books_authors(r, books, count, limit, offset);
db_assign_book_authors(p_a);
p_t = db_load_books_tags(r, books, count, limit, offset);
db_assign_book_tags(p_t);
ksql_stmt_free(stmt);
return count;
}
static void
db_book_full_tags(BookAdv *b, struct kreq *r, int64_t id)
{
struct ksqlstmt *stmt;
struct booktag *p = NULL;
struct booktag *item = NULL;
ksql_stmt_alloc(r->arg, &stmt,
stmts[STMT_BOOK_TAGS],
STMT_BOOK_TAGS);
ksql_bind_int(stmt, 0, id);
while (KSQL_ROW == ksql_stmt_step(stmt)) {
item = kcalloc(1, sizeof(struct booktag));
item->tag = kstrdup(ksql_stmt_str(stmt, 0));
item->b = b;
item->b->tsize++;
item->p = p;
p = item;
}
ksql_stmt_free(stmt);
db_assign_book_tags(p);
}
static void
db_book_full_authors(BookAdv *b, struct kreq *r, int64_t id) {
struct ksqlstmt *stmt;
@ -311,10 +421,10 @@ db_book_full_authors(BookAdv *b, struct kreq *r, int64_t id) {
item->p = p;
p = item;
}
ksql_stmt_free(stmt);
// assign authors to book
db_assign_book_authors(p);
ksql_stmt_free(stmt);
}
static void
@ -383,6 +493,7 @@ db_book_load(struct kreq *r, int64_t id)
ksql_stmt_free(stmt);
db_book_full_tags(&book->ba, r, id);
db_book_full_authors(&book->ba, r, id);
db_book_full_data(book, r, id);

3
extern.h
View File

@ -64,7 +64,8 @@ typedef struct
Book b;
Author **a;
size_t asize;
// TODO tags
char **tags;
size_t tsize;
} BookAdv;
typedef struct