Added automatic database backups.

database.go

@@ -8,10 +8,16 @@ package main
 import (
 	"bitbucket.org/liamstask/goose/lib/goose"
 	"database/sql"
+	"fmt"
 	"github.com/jmoiron/modl"
 	_ "github.com/mattn/go-sqlite3"
+	"io"
+	"os"
+	"strings"
+	"time"
 )
 
+const backupsDir = "db/backups"
 const migrationsDir = "db/migrations"
 
 type Database struct {
@@ -56,6 +62,30 @@ func (database *Database) Close() {
 	database.db.Close()
 }
 
+// Creates a copy of the current database and saves it to the backups directory.
+func (database *Database) Backup() error {
+	err := os.MkdirAll(backupsDir, 0755)
+	if err != nil {
+		return err
+	}
+	filename := fmt.Sprintf("%s/%s-%s.db", backupsDir, strings.Replace(eventSettings.Name, " ", "_", -1),
+		time.Now().Format("20060102150405"))
+	src, err := os.Open(database.path)
+	if err != nil {
+		return err
+	}
+	defer src.Close()
+	dest, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer dest.Close()
+	if _, err := io.Copy(dest, src); err != nil {
+		return err
+	}
+	return nil
+}
+
 // Sets up table-object associations.
 func (database *Database) mapTables() {
 	dialect := new(modl.SqliteDialect)

match_play.go

@@ -485,6 +485,12 @@ func CommitMatchScore(match *Match, matchResult *MatchResult) error {
 		}()
 	}
 
+	// Back up the database, but don't error out if it fails.
+	err = db.Backup()
+	if err != nil {
+		log.Println(err)
+	}
+
 	return nil
 }
 

setup_alliance_selection.go

@@ -218,6 +218,13 @@ func AllianceSelectionFinalizeHandler(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	// Back up the database.
+	err = db.Backup()
+	if err != nil {
+		handleWebErr(w, err)
+		return
+	}
+
 	http.Redirect(w, r, "/setup/alliance_selection", 302)
 }
 

setup_schedule.go

@@ -131,6 +131,13 @@ func ScheduleSavePostHandler(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	// Back up the database.
+	err = db.Backup()
+	if err != nil {
+		handleWebErr(w, err)
+		return
+	}
+
 	http.Redirect(w, r, "/setup/schedule", 302)
 }
 

setup_settings.go

@@ -136,6 +136,13 @@ func RestoreDbHandler(w http.ResponseWriter, r *http.Request) {
 	}
 	tempDb.Close()
 
+	// Back up the current database.
+	err = db.Backup()
+	if err != nil {
+		handleWebErr(w, err)
+		return
+	}
+
 	// Replace the current database with the new one.
 	db.Close()
 	err = os.Rename(tempFilePath, eventDbPath)