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Moew weork done

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This commit is contained in:
Melody Becker 2024-09-12 16:57:53 +02:00
parent 814316ab1e
commit 07d98d1ef5
10 changed files with 147 additions and 16 deletions
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30
storage/cache.go
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@ -7,15 +7,21 @@ import (
"github.com/redis/go-redis/v9"
)
// various prefixes for accessing items in the cache (since it's a simple key-value store)
const (
cacheUserHandleToIdPrefix = "acc-name-to-id:"
cacheUserIdToAccPrefix = "acc-id-to-data:"
cacheNoteIdToNotePrefix = "note-id-to-data:"
)
// An error describing the case where some value was just not found in the cache
var errCacheNotFound = errors.New("not found in cache")
// Find an account id in cache using a given user handle
func (s *Storage) cacheHandleToAccUid(handle string) (*string, error) {
// accId contains the Id of the account if found
// err contains an error describing why an account's id couldn't be found
// The most common one should be errCacheNotFound
func (s *Storage) cacheHandleToAccUid(handle string) (accId *string, err error) {
// Where to put the data (in case it's found)
var target string
found, err := s.cache.Get(cacheUserHandleToIdPrefix+strings.TrimLeft(handle, "@"), &target)
@ -33,7 +39,10 @@ func (s *Storage) cacheHandleToAccUid(handle string) (*string, error) {
}
// Find an account's data in cache using a given account id
func (s *Storage) cacheAccIdToData(id string) (*Account, error) {
// acc contains the full account as stored last time if found
// err contains an error describing why an account couldn't be found
// The most common one should be errCacheNotFound
func (s *Storage) cacheAccIdToData(id string) (acc *Account, err error) {
var target Account
found, err := s.cache.Get(cacheUserIdToAccPrefix+id, &target)
if !found {
@ -45,3 +54,20 @@ func (s *Storage) cacheAccIdToData(id string) (*Account, error) {
}
return &target, nil
}
// Find a cached note given its ID
// note contains the full note as stored last time if found
// err contains an error describing why a note couldn't be found
// The most common one should be errCacheNotFound
func (s *Storage) cacheNoteIdToData(id string) (note *Note, err error) {
target := Note{}
found, err := s.cache.Get(cacheNoteIdToNotePrefix+id, &target)
if !found {
if err != nil && !errors.Is(err, redis.Nil) {
return nil, err
} else {
return nil, errCacheNotFound
}
}
return &target, nil
}