06f78e0083
- Adds interfaces for developers to build handlers that update data in response to log events - Resolves #29
58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
package postgres
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/jmoiron/sqlx"
|
|
_ "github.com/lib/pq" //postgres driver
|
|
"github.com/vulcanize/vulcanizedb/pkg/config"
|
|
"github.com/vulcanize/vulcanizedb/pkg/core"
|
|
)
|
|
|
|
type DB struct {
|
|
*sqlx.DB
|
|
Node core.Node
|
|
NodeID int64
|
|
}
|
|
|
|
var (
|
|
ErrDBInsertFailed = errors.New("postgres: insert failed")
|
|
ErrDBDeleteFailed = errors.New("postgres: delete failed")
|
|
ErrDBConnectionFailed = errors.New("postgres: db connection failed")
|
|
ErrUnableToSetNode = errors.New("postgres: unable to set node")
|
|
)
|
|
|
|
func NewDB(databaseConfig config.Database, node core.Node) (*DB, error) {
|
|
connectString := config.DbConnectionString(databaseConfig)
|
|
db, err := sqlx.Connect("postgres", connectString)
|
|
if err != nil {
|
|
return &DB{}, ErrDBConnectionFailed
|
|
}
|
|
pg := DB{DB: db, Node: node}
|
|
err = pg.CreateNode(&node)
|
|
if err != nil {
|
|
return &DB{}, ErrUnableToSetNode
|
|
}
|
|
return &pg, nil
|
|
}
|
|
|
|
func (db *DB) CreateNode(node *core.Node) error {
|
|
var nodeId int64
|
|
err := db.QueryRow(
|
|
`INSERT INTO nodes (genesis_block, network_id, node_id, client_name)
|
|
VALUES ($1, $2, $3, $4)
|
|
ON CONFLICT (genesis_block, network_id, node_id)
|
|
DO UPDATE
|
|
SET genesis_block = $1,
|
|
network_id = $2,
|
|
node_id = $3,
|
|
client_name = $4
|
|
RETURNING id`,
|
|
node.GenesisBlock, node.NetworkID, node.ID, node.ClientName).Scan(&nodeId)
|
|
if err != nil {
|
|
return ErrUnableToSetNode
|
|
}
|
|
db.NodeID = nodeId
|
|
return nil
|
|
}
|