fastpastebin/internal/database/database.go

137 lines
3.8 KiB
Go

// Fast Paste Bin - uberfast and easy-to-use pastebin.
//
// Copyright (c) 2018, Stanislav N. aka pztrn and Fast Paste Bin
// developers.
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject
// to the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
// OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
package database
import (
// stdlib
"database/sql"
"time"
// local
"go.dev.pztrn.name/fastpastebin/internal/database/dialects/flatfiles"
dialectinterface "go.dev.pztrn.name/fastpastebin/internal/database/dialects/interface"
"go.dev.pztrn.name/fastpastebin/internal/database/dialects/mysql"
"go.dev.pztrn.name/fastpastebin/internal/database/dialects/postgresql"
"go.dev.pztrn.name/fastpastebin/internal/structs"
// other
_ "github.com/go-sql-driver/mysql"
)
// Database represents control structure for database connection.
type Database struct {
db dialectinterface.Interface
}
// Database cleanup function. Executes once per hour, hardcoded for now and is
// a subject of change in future.
func (db *Database) cleanup() {
for {
c.Logger.Info().Msg("Starting pastes cleanup procedure...")
pages := db.db.GetPastesPages()
var pasteIDsToRemove []int
for i := 0; i < pages; i++ {
pastes, err := db.db.GetPagedPastes(i)
if err != nil {
c.Logger.Error().Err(err).Int("page", i).Msg("Failed to perform database cleanup")
}
for _, paste := range pastes {
if paste.IsExpired() {
pasteIDsToRemove = append(pasteIDsToRemove, paste.ID)
}
}
}
for _, pasteID := range pasteIDsToRemove {
err := db.DeletePaste(pasteID)
if err != nil {
c.Logger.Error().Err(err).Int("paste", pasteID).Msg("Failed to delete paste!")
}
}
c.Logger.Info().Msg("Pastes cleanup done.")
time.Sleep(time.Hour)
}
}
func (db *Database) DeletePaste(pasteID int) error {
return db.db.DeletePaste(pasteID)
}
func (db *Database) GetDatabaseConnection() *sql.DB {
if db.db != nil {
return db.db.GetDatabaseConnection()
}
return nil
}
func (db *Database) GetPaste(pasteID int) (*structs.Paste, error) {
return db.db.GetPaste(pasteID)
}
func (db *Database) GetPagedPastes(page int) ([]structs.Paste, error) {
return db.db.GetPagedPastes(page)
}
func (db *Database) GetPastesPages() int {
return db.db.GetPastesPages()
}
// Initialize initializes connection to database.
func (db *Database) Initialize() {
c.Logger.Info().Msg("Initializing database connection...")
if c.Config.Database.Type == "mysql" {
mysql.New(c)
} else if c.Config.Database.Type == "flatfiles" {
flatfiles.New(c)
} else if c.Config.Database.Type == "postgresql" {
postgresql.New(c)
} else {
c.Logger.Fatal().Str("type", c.Config.Database.Type).Msg("Unknown database type")
}
go db.cleanup()
}
func (db *Database) RegisterDialect(di dialectinterface.Interface) {
db.db = di
db.db.Initialize()
}
func (db *Database) SavePaste(p *structs.Paste) (int64, error) {
return db.db.SavePaste(p)
}
func (db *Database) Shutdown() {
db.db.Shutdown()
}