forked from textileio/go-textile
/
blocks.go
140 lines (129 loc) · 3.03 KB
/
blocks.go
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package db
import (
"database/sql"
"strconv"
"strings"
"sync"
"time"
"github.com/textileio/textile-go/repo"
)
type BlockDB struct {
modelStore
}
func NewBlockStore(db *sql.DB, lock *sync.Mutex) repo.BlockStore {
return &BlockDB{modelStore{db, lock}}
}
func (c *BlockDB) Add(block *repo.Block) error {
c.lock.Lock()
defer c.lock.Unlock()
tx, err := c.db.Begin()
if err != nil {
return err
}
stm := `insert into blocks(id, threadId, authorId, type, date, parents, target, body) values(?,?,?,?,?,?,?,?)`
stmt, err := tx.Prepare(stm)
if err != nil {
log.Errorf("error in tx prepare: %s", err)
return err
}
defer stmt.Close()
_, err = stmt.Exec(
block.Id,
block.ThreadId,
block.AuthorId,
int(block.Type),
int(block.Date.Unix()),
strings.Join(block.Parents, ","),
block.Target,
block.Body,
)
if err != nil {
tx.Rollback()
return err
}
tx.Commit()
return nil
}
func (c *BlockDB) Get(id string) *repo.Block {
c.lock.Lock()
defer c.lock.Unlock()
ret := c.handleQuery("select * from blocks where id='" + id + "';")
if len(ret) == 0 {
return nil
}
return &ret[0]
}
func (c *BlockDB) List(offset string, limit int, query string) []repo.Block {
c.lock.Lock()
defer c.lock.Unlock()
var stm, q string
if offset != "" {
if query != "" {
q = query + " and "
}
stm = "select * from blocks where " + q + "date<(select date from blocks where id='" + offset + "') order by date desc limit " + strconv.Itoa(limit) + ";"
} else {
if query != "" {
q = "where " + query + " "
}
stm = "select * from blocks " + q + "order by date desc limit " + strconv.Itoa(limit) + ";"
}
return c.handleQuery(stm)
}
func (c *BlockDB) Count(query string) int {
c.lock.Lock()
defer c.lock.Unlock()
var q string
if query != "" {
q = " where " + query
}
row := c.db.QueryRow("select Count(*) from blocks" + q + ";")
var count int
row.Scan(&count)
return count
}
func (c *BlockDB) Delete(id string) error {
c.lock.Lock()
defer c.lock.Unlock()
_, err := c.db.Exec("delete from blocks where id=?", id)
return err
}
func (c *BlockDB) DeleteByThread(threadId string) error {
c.lock.Lock()
defer c.lock.Unlock()
_, err := c.db.Exec("delete from blocks where threadId=?", threadId)
return err
}
func (c *BlockDB) handleQuery(stm string) []repo.Block {
var ret []repo.Block
rows, err := c.db.Query(stm)
if err != nil {
log.Errorf("error in db query: %s", err)
return nil
}
for rows.Next() {
var id, threadId, authorId, parents, target, body string
var dateInt, typeInt int
if err := rows.Scan(&id, &threadId, &authorId, &typeInt, &dateInt, &parents, &target, &body); err != nil {
log.Errorf("error in db scan: %s", err)
continue
}
plist := make([]string, 0)
for _, p := range strings.Split(parents, ",") {
if p != "" {
plist = append(plist, p)
}
}
ret = append(ret, repo.Block{
Id: id,
ThreadId: threadId,
AuthorId: authorId,
Type: repo.BlockType(typeInt),
Date: time.Unix(int64(dateInt), 0),
Parents: plist,
Target: target,
Body: body,
})
}
return ret
}