add left pack algo

cmd/cli/plan.go

@@ -28,6 +28,18 @@ func plan() *cli.Command {
 				Aliases: []string{"v"},
 				Value:   false,
 			},
+			&cli.BoolFlag{
+				Name:    "left-pack",
+				Usage:   "Use the left-pack algorithm to calculate partitions",
+				Aliases: []string{"l"},
+				Value:   false,
+			},
+			&cli.BoolFlag{
+				Name:    "reset",
+				Usage:   "Reset the database before planning partitions",
+				Aliases: []string{"r"},
+				Value:   false,
+			},
 		},
 		Action: func(c *cli.Context) error {
 
@@ -42,6 +54,13 @@ func plan() *cli.Command {
 				panic(fmt.Errorf("error migrating db: %w", err))
 			}
 
+			if c.Bool("reset") {
+				err = store.RemovePartitionAssignment()
+				if err != nil {
+					return fmt.Errorf("error resetting partitions in the db: %w", err)
+				}
+			}
+
 			size := int64(4600000000) // size of a single layer DVD
 			targetSize := c.String("targetSize")
 			switch targetSize {
@@ -76,9 +95,20 @@ func plan() *cli.Command {
 			fmt.Printf("Target Size: %v\n", humanize.Bytes(uint64(size)))
 			fmt.Println("Calculating partitions...")
 
-			partitions, err := partitioner.CalculatePartitions(store, size)
-			if err != nil {
-				return fmt.Errorf("error calculating partitions: %w", err)
+			var partitions [][]types.FileMetadata
+
+			if !c.Bool("left-pack") {
+				partitions, err = partitioner.CalculatePartitions(store, size)
+				if err != nil {
+					return fmt.Errorf("error calculating partitions: %w", err)
+				}
+			}
+
+			if c.Bool("left-pack") {
+				partitions, err = partitioner.CalculatePartitionsLeftPack(store, size)
+				if err != nil {
+					return fmt.Errorf("error calculating partitions: %w", err)
+				}
 			}
 
 			for i, partition := range partitions {