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package cache
import (
"sync"
"github.com/MichaelMure/git-bug/entities/bug"
"github.com/MichaelMure/git-bug/entity"
"github.com/MichaelMure/git-bug/entity/dag"
"github.com/MichaelMure/git-bug/repository"
)
// type withSnapshot[SnapT dag.Snapshot, OpT dag.OperationWithApply[SnapT]] struct {
// dag.Interface[SnapT, OpT]
// snap dag.Snapshot
// }
//
//
// func (ws *withSnapshot[SnapT, OpT]) Compile() dag.Snapshot {
// if ws.snap == nil {
// snap := ws.Interface.Compile()
// ws.snap = snap
// }
// return ws.snap
// }
//
// // Append intercept Bug.Append() to update the snapshot efficiently
// func (ws *withSnapshot[SnapT, OpT]) Append(op OpT) {
// ws.Interface.Append(op)
//
// if ws.snap == nil {
// return
// }
//
// op.Apply(ws.snap)
// ws.snap. = append(ws.snap.Operations, op)
// }
//
// // Commit intercept Bug.Commit() to update the snapshot efficiently
// func (ws *withSnapshot[SnapT, OpT]) Commit(repo repository.ClockedRepo) error {
// err := ws.Interface.Commit(repo)
//
// if err != nil {
// ws.snap = nil
// return err
// }
//
// // Commit() shouldn't change anything of the bug state apart from the
// // initial ID set
//
// if ws.snap == nil {
// return nil
// }
//
// ws.snap.id = ws.Interface.Id()
// return nil
// }
type CachedEntityBase[SnapT dag.Snapshot, OpT dag.Operation] struct {
repo repository.ClockedRepo
entityUpdated func(id entity.Id) error
getUserIdentity getUserIdentityFunc
mu sync.RWMutex
entity dag.Interface[SnapT, OpT]
}
func (e *CachedEntityBase[SnapT, OpT]) Id() entity.Id {
return e.entity.Id()
}
func (e *CachedEntityBase[SnapT, OpT]) Snapshot() SnapT {
e.mu.RLock()
defer e.mu.RUnlock()
return e.entity.Compile()
}
func (e *CachedEntityBase[SnapT, OpT]) notifyUpdated() error {
return e.entityUpdated(e.entity.Id())
}
// ResolveOperationWithMetadata will find an operation that has the matching metadata
func (e *CachedEntityBase[SnapT, OpT]) ResolveOperationWithMetadata(key string, value string) (entity.Id, error) {
e.mu.RLock()
defer e.mu.RUnlock()
// preallocate but empty
matching := make([]entity.Id, 0, 5)
for _, op := range e.entity.Operations() {
opValue, ok := op.GetMetadata(key)
if ok && value == opValue {
matching = append(matching, op.Id())
}
}
if len(matching) == 0 {
return "", ErrNoMatchingOp
}
if len(matching) > 1 {
return "", bug.NewErrMultipleMatchOp(matching)
}
return matching[0], nil
}
func (e *CachedEntityBase[SnapT, OpT]) Validate() error {
e.mu.RLock()
defer e.mu.RUnlock()
return e.entity.Validate()
}
func (e *CachedEntityBase[SnapT, OpT]) Commit() error {
e.mu.Lock()
err := e.entity.Commit(e.repo)
if err != nil {
e.mu.Unlock()
return err
}
e.mu.Unlock()
return e.notifyUpdated()
}
func (e *CachedEntityBase[SnapT, OpT]) CommitAsNeeded() error {
e.mu.Lock()
err := e.entity.CommitAsNeeded(e.repo)
if err != nil {
e.mu.Unlock()
return err
}
e.mu.Unlock()
return e.notifyUpdated()
}
func (e *CachedEntityBase[SnapT, OpT]) NeedCommit() bool {
e.mu.RLock()
defer e.mu.RUnlock()
return e.entity.NeedCommit()
}
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