From 45f5f852b71a63c142bca8b05efe53eebf142594 Mon Sep 17 00:00:00 2001
From: Michael Muré <batolettre@gmail.com>
Date: Sat, 13 Aug 2022 12:08:48 +0200
Subject: core: generalized resolvers to resolve any entity time when
 unmarshalling an operation

---
 identity/resolver.go | 47 +++++------------------------------------------
 1 file changed, 5 insertions(+), 42 deletions(-)

(limited to 'identity/resolver.go')

diff --git a/identity/resolver.go b/identity/resolver.go
index 8e066e9d..5468a8f8 100644
--- a/identity/resolver.go
+++ b/identity/resolver.go
@@ -1,17 +1,11 @@
 package identity
 
 import (
-	"sync"
-
 	"github.com/MichaelMure/git-bug/entity"
 	"github.com/MichaelMure/git-bug/repository"
 )
 
-// Resolver define the interface of an Identity resolver, able to load
-// an identity from, for example, a repo or a cache.
-type Resolver interface {
-	ResolveIdentity(id entity.Id) (Interface, error)
-}
+var _ entity.Resolver = &SimpleResolver{}
 
 // SimpleResolver is a Resolver loading Identities directly from a Repo
 type SimpleResolver struct {
@@ -22,10 +16,12 @@ func NewSimpleResolver(repo repository.Repo) *SimpleResolver {
 	return &SimpleResolver{repo: repo}
 }
 
-func (r *SimpleResolver) ResolveIdentity(id entity.Id) (Interface, error) {
+func (r *SimpleResolver) Resolve(id entity.Id) (entity.Interface, error) {
 	return ReadLocal(r.repo, id)
 }
 
+var _ entity.Resolver = &StubResolver{}
+
 // StubResolver is a Resolver that doesn't load anything, only returning IdentityStub instances
 type StubResolver struct{}
 
@@ -33,39 +29,6 @@ func NewStubResolver() *StubResolver {
 	return &StubResolver{}
 }
 
-func (s *StubResolver) ResolveIdentity(id entity.Id) (Interface, error) {
+func (s *StubResolver) Resolve(id entity.Id) (entity.Interface, error) {
 	return &IdentityStub{id: id}, nil
 }
-
-// CachedResolver is a resolver ensuring that loading is done only once through another Resolver.
-type CachedResolver struct {
-	mu         sync.RWMutex
-	resolver   Resolver
-	identities map[entity.Id]Interface
-}
-
-func NewCachedResolver(resolver Resolver) *CachedResolver {
-	return &CachedResolver{
-		resolver:   resolver,
-		identities: make(map[entity.Id]Interface),
-	}
-}
-
-func (c *CachedResolver) ResolveIdentity(id entity.Id) (Interface, error) {
-	c.mu.RLock()
-	if i, ok := c.identities[id]; ok {
-		c.mu.RUnlock()
-		return i, nil
-	}
-	c.mu.RUnlock()
-
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
-	i, err := c.resolver.ResolveIdentity(id)
-	if err != nil {
-		return nil, err
-	}
-	c.identities[id] = i
-	return i, nil
-}
-- 
cgit