aboutsummaryrefslogtreecommitdiffstats
path: root/graphql/models/lazy_bug.go
diff options
context:
space:
mode:
Diffstat (limited to 'graphql/models/lazy_bug.go')
-rw-r--r--graphql/models/lazy_bug.go215
1 files changed, 215 insertions, 0 deletions
diff --git a/graphql/models/lazy_bug.go b/graphql/models/lazy_bug.go
new file mode 100644
index 00000000..6034e80d
--- /dev/null
+++ b/graphql/models/lazy_bug.go
@@ -0,0 +1,215 @@
+package models
+
+import (
+ "sync"
+ "time"
+
+ "github.com/MichaelMure/git-bug/bug"
+ "github.com/MichaelMure/git-bug/cache"
+ "github.com/MichaelMure/git-bug/entity"
+)
+
+// BugWrapper is an interface used by the GraphQL resolvers to handle a bug.
+// Depending on the situation, a Bug can already be fully loaded in memory or not.
+// This interface is used to wrap either a lazyBug or a loadedBug depending on the situation.
+type BugWrapper interface {
+ Id() entity.Id
+ LastEdit() time.Time
+ Status() bug.Status
+ Title() string
+ Comments() ([]bug.Comment, error)
+ Labels() []bug.Label
+ Author() (IdentityWrapper, error)
+ Actors() ([]IdentityWrapper, error)
+ Participants() ([]IdentityWrapper, error)
+ CreatedAt() time.Time
+ Timeline() ([]bug.TimelineItem, error)
+ Operations() ([]bug.Operation, error)
+
+ IsAuthored()
+}
+
+var _ BugWrapper = &lazyBug{}
+
+// lazyBug is a lazy-loading wrapper that fetch data from the cache (BugExcerpt) in priority,
+// and load the complete bug and snapshot only when necessary.
+type lazyBug struct {
+ cache *cache.RepoCache
+ excerpt *cache.BugExcerpt
+
+ mu sync.Mutex
+ snap *bug.Snapshot
+}
+
+func NewLazyBug(cache *cache.RepoCache, excerpt *cache.BugExcerpt) *lazyBug {
+ return &lazyBug{
+ cache: cache,
+ excerpt: excerpt,
+ }
+}
+
+func (lb *lazyBug) load() error {
+ if lb.snap != nil {
+ return nil
+ }
+
+ lb.mu.Lock()
+ defer lb.mu.Unlock()
+
+ b, err := lb.cache.ResolveBug(lb.excerpt.Id)
+ if err != nil {
+ return err
+ }
+
+ lb.snap = b.Snapshot()
+ return nil
+}
+
+func (lb *lazyBug) identity(id entity.Id) (IdentityWrapper, error) {
+ i, err := lb.cache.ResolveIdentityExcerpt(id)
+ if err != nil {
+ return nil, err
+ }
+ return &lazyIdentity{cache: lb.cache, excerpt: i}, nil
+}
+
+// Sign post method for gqlgen
+func (lb *lazyBug) IsAuthored() {}
+
+func (lb *lazyBug) Id() entity.Id {
+ return lb.excerpt.Id
+}
+
+func (lb *lazyBug) LastEdit() time.Time {
+ return time.Unix(lb.excerpt.EditUnixTime, 0)
+}
+
+func (lb *lazyBug) Status() bug.Status {
+ return lb.excerpt.Status
+}
+
+func (lb *lazyBug) Title() string {
+ return lb.excerpt.Title
+}
+
+func (lb *lazyBug) Comments() ([]bug.Comment, error) {
+ err := lb.load()
+ if err != nil {
+ return nil, err
+ }
+ return lb.snap.Comments, nil
+}
+
+func (lb *lazyBug) Labels() []bug.Label {
+ return lb.excerpt.Labels
+}
+
+func (lb *lazyBug) Author() (IdentityWrapper, error) {
+ return lb.identity(lb.excerpt.AuthorId)
+}
+
+func (lb *lazyBug) Actors() ([]IdentityWrapper, error) {
+ result := make([]IdentityWrapper, len(lb.excerpt.Actors))
+ for i, actorId := range lb.excerpt.Actors {
+ actor, err := lb.identity(actorId)
+ if err != nil {
+ return nil, err
+ }
+ result[i] = actor
+ }
+ return result, nil
+}
+
+func (lb *lazyBug) Participants() ([]IdentityWrapper, error) {
+ result := make([]IdentityWrapper, len(lb.excerpt.Participants))
+ for i, participantId := range lb.excerpt.Participants {
+ participant, err := lb.identity(participantId)
+ if err != nil {
+ return nil, err
+ }
+ result[i] = participant
+ }
+ return result, nil
+}
+
+func (lb *lazyBug) CreatedAt() time.Time {
+ return time.Unix(lb.excerpt.CreateUnixTime, 0)
+}
+
+func (lb *lazyBug) Timeline() ([]bug.TimelineItem, error) {
+ err := lb.load()
+ if err != nil {
+ return nil, err
+ }
+ return lb.snap.Timeline, nil
+}
+
+func (lb *lazyBug) Operations() ([]bug.Operation, error) {
+ err := lb.load()
+ if err != nil {
+ return nil, err
+ }
+ return lb.snap.Operations, nil
+}
+
+var _ BugWrapper = &loadedBug{}
+
+type loadedBug struct {
+ *bug.Snapshot
+}
+
+func NewLoadedBug(snap *bug.Snapshot) *loadedBug {
+ return &loadedBug{Snapshot: snap}
+}
+
+func (l *loadedBug) LastEdit() time.Time {
+ return l.Snapshot.LastEditTime()
+}
+
+func (l *loadedBug) Status() bug.Status {
+ return l.Snapshot.Status
+}
+
+func (l *loadedBug) Title() string {
+ return l.Snapshot.Title
+}
+
+func (l *loadedBug) Comments() ([]bug.Comment, error) {
+ return l.Snapshot.Comments, nil
+}
+
+func (l *loadedBug) Labels() []bug.Label {
+ return l.Snapshot.Labels
+}
+
+func (l *loadedBug) Author() (IdentityWrapper, error) {
+ return NewLoadedIdentity(l.Snapshot.Author), nil
+}
+
+func (l *loadedBug) Actors() ([]IdentityWrapper, error) {
+ res := make([]IdentityWrapper, len(l.Snapshot.Actors))
+ for i, actor := range l.Snapshot.Actors {
+ res[i] = NewLoadedIdentity(actor)
+ }
+ return res, nil
+}
+
+func (l *loadedBug) Participants() ([]IdentityWrapper, error) {
+ res := make([]IdentityWrapper, len(l.Snapshot.Participants))
+ for i, participant := range l.Snapshot.Participants {
+ res[i] = NewLoadedIdentity(participant)
+ }
+ return res, nil
+}
+
+func (l *loadedBug) CreatedAt() time.Time {
+ return l.Snapshot.CreatedAt
+}
+
+func (l *loadedBug) Timeline() ([]bug.TimelineItem, error) {
+ return l.Snapshot.Timeline, nil
+}
+
+func (l *loadedBug) Operations() ([]bug.Operation, error) {
+ return l.Snapshot.Operations, nil
+}