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337 lines (272 loc) · 8.11 KB
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package cache
import (
"fmt"
"sync"
"time"
"github.com/MichaelMure/git-bug/bug"
"github.com/MichaelMure/git-bug/entity"
"github.com/MichaelMure/git-bug/repository"
)
var ErrNoMatchingOp = fmt.Errorf("no matching operation found")
// BugCache is a wrapper around a Bug. It provide multiple functions:
//
// 1. Provide a higher level API to use than the raw API from Bug.
// 2. Maintain an up to date Snapshot available.
// 3. Deal with concurrency.
type BugCache struct {
repoCache *RepoCache
mu sync.RWMutex
bug *bug.WithSnapshot
}
func NewBugCache(repoCache *RepoCache, b *bug.Bug) *BugCache {
return &BugCache{
repoCache: repoCache,
bug: &bug.WithSnapshot{Bug: b},
}
}
func (c *BugCache) Snapshot() *bug.Snapshot {
c.mu.RLock()
defer c.mu.RUnlock()
return c.bug.Snapshot()
}
func (c *BugCache) Id() entity.Id {
return c.bug.Id()
}
func (c *BugCache) notifyUpdated() error {
return c.repoCache.bugUpdated(c.bug.Id())
}
// ResolveOperationWithMetadata will find an operation that has the matching metadata
func (c *BugCache) ResolveOperationWithMetadata(key string, value string) (entity.Id, error) {
c.mu.RLock()
defer c.mu.RUnlock()
// preallocate but empty
matching := make([]entity.Id, 0, 5)
it := bug.NewOperationIterator(c.bug)
for it.Next() {
op := it.Value()
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 (c *BugCache) AddComment(message string) (*bug.AddCommentOperation, error) {
return c.AddCommentWithFiles(message, nil)
}
func (c *BugCache) AddCommentWithFiles(message string, files []repository.Hash) (*bug.AddCommentOperation, error) {
author, err := c.repoCache.GetUserIdentity()
if err != nil {
return nil, err
}
return c.AddCommentRaw(author, time.Now().Unix(), message, files, nil)
}
func (c *BugCache) AddCommentRaw(author *IdentityCache, unixTime int64, message string, files []repository.Hash, metadata map[string]string) (*bug.AddCommentOperation, error) {
c.mu.Lock()
op, err := bug.AddCommentWithFiles(c.bug, author.Identity, unixTime, message, files)
if err != nil {
c.mu.Unlock()
return nil, err
}
for key, value := range metadata {
op.SetMetadata(key, value)
}
c.mu.Unlock()
return op, c.notifyUpdated()
}
func (c *BugCache) ChangeLabels(added []string, removed []string) ([]bug.LabelChangeResult, *bug.LabelChangeOperation, error) {
author, err := c.repoCache.GetUserIdentity()
if err != nil {
return nil, nil, err
}
return c.ChangeLabelsRaw(author, time.Now().Unix(), added, removed, nil)
}
func (c *BugCache) ChangeLabelsRaw(author *IdentityCache, unixTime int64, added []string, removed []string, metadata map[string]string) ([]bug.LabelChangeResult, *bug.LabelChangeOperation, error) {
c.mu.Lock()
changes, op, err := bug.ChangeLabels(c.bug, author.Identity, unixTime, added, removed)
if err != nil {
c.mu.Unlock()
return changes, nil, err
}
for key, value := range metadata {
op.SetMetadata(key, value)
}
c.mu.Unlock()
err = c.notifyUpdated()
if err != nil {
return nil, nil, err
}
return changes, op, nil
}
func (c *BugCache) ForceChangeLabels(added []string, removed []string) (*bug.LabelChangeOperation, error) {
author, err := c.repoCache.GetUserIdentity()
if err != nil {
return nil, err
}
return c.ForceChangeLabelsRaw(author, time.Now().Unix(), added, removed, nil)
}
func (c *BugCache) ForceChangeLabelsRaw(author *IdentityCache, unixTime int64, added []string, removed []string, metadata map[string]string) (*bug.LabelChangeOperation, error) {
c.mu.Lock()
op, err := bug.ForceChangeLabels(c.bug, author.Identity, unixTime, added, removed)
if err != nil {
c.mu.Unlock()
return nil, err
}
for key, value := range metadata {
op.SetMetadata(key, value)
}
c.mu.Unlock()
err = c.notifyUpdated()
if err != nil {
return nil, err
}
return op, nil
}
func (c *BugCache) Open() (*bug.SetStatusOperation, error) {
author, err := c.repoCache.GetUserIdentity()
if err != nil {
return nil, err
}
return c.OpenRaw(author, time.Now().Unix(), nil)
}
func (c *BugCache) OpenRaw(author *IdentityCache, unixTime int64, metadata map[string]string) (*bug.SetStatusOperation, error) {
c.mu.Lock()
op, err := bug.Open(c.bug, author.Identity, unixTime)
if err != nil {
c.mu.Unlock()
return nil, err
}
for key, value := range metadata {
op.SetMetadata(key, value)
}
c.mu.Unlock()
return op, c.notifyUpdated()
}
func (c *BugCache) Close() (*bug.SetStatusOperation, error) {
author, err := c.repoCache.GetUserIdentity()
if err != nil {
return nil, err
}
return c.CloseRaw(author, time.Now().Unix(), nil)
}
func (c *BugCache) CloseRaw(author *IdentityCache, unixTime int64, metadata map[string]string) (*bug.SetStatusOperation, error) {
c.mu.Lock()
op, err := bug.Close(c.bug, author.Identity, unixTime)
if err != nil {
c.mu.Unlock()
return nil, err
}
for key, value := range metadata {
op.SetMetadata(key, value)
}
c.mu.Unlock()
return op, c.notifyUpdated()
}
func (c *BugCache) SetTitle(title string) (*bug.SetTitleOperation, error) {
author, err := c.repoCache.GetUserIdentity()
if err != nil {
return nil, err
}
return c.SetTitleRaw(author, time.Now().Unix(), title, nil)
}
func (c *BugCache) SetTitleRaw(author *IdentityCache, unixTime int64, title string, metadata map[string]string) (*bug.SetTitleOperation, error) {
c.mu.Lock()
op, err := bug.SetTitle(c.bug, author.Identity, unixTime, title)
if err != nil {
c.mu.Unlock()
return nil, err
}
for key, value := range metadata {
op.SetMetadata(key, value)
}
c.mu.Unlock()
return op, c.notifyUpdated()
}
func (c *BugCache) EditCreateComment(body string) (*bug.EditCommentOperation, error) {
author, err := c.repoCache.GetUserIdentity()
if err != nil {
return nil, err
}
return c.EditCreateCommentRaw(author, time.Now().Unix(), body, nil)
}
func (c *BugCache) EditCreateCommentRaw(author *IdentityCache, unixTime int64, body string, metadata map[string]string) (*bug.EditCommentOperation, error) {
c.mu.Lock()
op, err := bug.EditCreateComment(c.bug, author.Identity, unixTime, body)
if err != nil {
c.mu.Unlock()
return nil, err
}
for key, value := range metadata {
op.SetMetadata(key, value)
}
c.mu.Unlock()
return op, c.notifyUpdated()
}
func (c *BugCache) EditComment(target entity.Id, message string) (*bug.EditCommentOperation, error) {
author, err := c.repoCache.GetUserIdentity()
if err != nil {
return nil, err
}
return c.EditCommentRaw(author, time.Now().Unix(), target, message, nil)
}
func (c *BugCache) EditCommentRaw(author *IdentityCache, unixTime int64, target entity.Id, message string, metadata map[string]string) (*bug.EditCommentOperation, error) {
c.mu.Lock()
op, err := bug.EditComment(c.bug, author.Identity, unixTime, target, message)
if err != nil {
c.mu.Unlock()
return nil, err
}
for key, value := range metadata {
op.SetMetadata(key, value)
}
c.mu.Unlock()
return op, c.notifyUpdated()
}
func (c *BugCache) SetMetadata(target entity.Id, newMetadata map[string]string) (*bug.SetMetadataOperation, error) {
author, err := c.repoCache.GetUserIdentity()
if err != nil {
return nil, err
}
return c.SetMetadataRaw(author, time.Now().Unix(), target, newMetadata)
}
func (c *BugCache) SetMetadataRaw(author *IdentityCache, unixTime int64, target entity.Id, newMetadata map[string]string) (*bug.SetMetadataOperation, error) {
c.mu.Lock()
op, err := bug.SetMetadata(c.bug, author.Identity, unixTime, target, newMetadata)
if err != nil {
c.mu.Unlock()
return nil, err
}
c.mu.Unlock()
return op, c.notifyUpdated()
}
func (c *BugCache) Commit() error {
c.mu.Lock()
err := c.bug.Commit(c.repoCache.repo)
if err != nil {
c.mu.Unlock()
return err
}
c.mu.Unlock()
return c.notifyUpdated()
}
func (c *BugCache) CommitAsNeeded() error {
c.mu.Lock()
err := c.bug.CommitAsNeeded(c.repoCache.repo)
if err != nil {
c.mu.Unlock()
return err
}
c.mu.Unlock()
return c.notifyUpdated()
}
func (c *BugCache) NeedCommit() bool {
c.mu.RLock()
defer c.mu.RUnlock()
return c.bug.NeedCommit()
}