1package board
  2
  3import (
  4	"fmt"
  5
  6	"github.com/MichaelMure/git-bug/entities/bug"
  7	"github.com/MichaelMure/git-bug/entities/identity"
  8	"github.com/MichaelMure/git-bug/entity"
  9	"github.com/MichaelMure/git-bug/entity/dag"
 10)
 11
 12// itemEntityType indicate the type of entity board item
 13type itemEntityType string
 14
 15const (
 16	entityTypeBug itemEntityType = "bug"
 17)
 18
 19var _ Operation = &AddItemEntityOperation{}
 20
 21type AddItemEntityOperation struct {
 22	dag.OpBase
 23	ColumnId   entity.Id        `json:"column"`
 24	EntityType itemEntityType   `json:"entity_type"`
 25	EntityId   entity.Id        `json:"entity_id"`
 26	entity     entity.Interface // not serialized
 27}
 28
 29func (op *AddItemEntityOperation) Id() entity.Id {
 30	return dag.IdOperation(op, &op.OpBase)
 31}
 32
 33func (op *AddItemEntityOperation) Validate() error {
 34	if err := op.OpBase.Validate(op, AddItemEntityOp); err != nil {
 35		return err
 36	}
 37
 38	if err := op.ColumnId.Validate(); err != nil {
 39		return err
 40	}
 41
 42	switch op.EntityType {
 43	case entityTypeBug:
 44	default:
 45		return fmt.Errorf("unknown entity type")
 46	}
 47
 48	if err := op.EntityId.Validate(); err != nil {
 49		return err
 50	}
 51
 52	return nil
 53}
 54
 55func (op *AddItemEntityOperation) Apply(snapshot *Snapshot) {
 56	if op.entity == nil {
 57		return
 58	}
 59
 60	snapshot.addActor(op.Author())
 61
 62	for _, column := range snapshot.Columns {
 63		if column.Id == op.ColumnId {
 64			switch e := op.entity.(type) {
 65			case bug.Interface:
 66				column.Items = append(column.Items, &BugItem{
 67					combinedId: entity.CombineIds(snapshot.Id(), e.Id()),
 68					bug:        e,
 69				})
 70			}
 71			return
 72		}
 73	}
 74}
 75
 76func NewAddItemEntityOp(author identity.Interface, unixTime int64, columnId entity.Id, e entity.Interface) *AddItemEntityOperation {
 77	switch e := e.(type) {
 78	case bug.Interface:
 79		return &AddItemEntityOperation{
 80			OpBase:     dag.NewOpBase(AddItemEntityOp, author, unixTime),
 81			ColumnId:   columnId,
 82			EntityType: entityTypeBug,
 83			EntityId:   e.Id(),
 84			entity:     e,
 85		}
 86	default:
 87		panic("invalid entity type")
 88	}
 89}
 90
 91// AddItemEntity is a convenience function to add an entity item to a Board
 92func AddItemEntity(b Interface, author identity.Interface, unixTime int64, columnId entity.Id, e entity.Interface, metadata map[string]string) (entity.CombinedId, *AddItemEntityOperation, error) {
 93	op := NewAddItemEntityOp(author, unixTime, columnId, e)
 94	for key, val := range metadata {
 95		op.SetMetadata(key, val)
 96	}
 97	if err := op.Validate(); err != nil {
 98		return entity.UnsetCombinedId, nil, err
 99	}
100	b.Append(op)
101	return entity.CombineIds(b.Id(), op.Id()), op, nil
102}