move DefaultRepository into own file; add todo tags;

internal/data/IRepository.go

@@ -1,12 +1,5 @@
 package data
 
-import (
-    "encoding/json"
-    "errors"
-    "strconv"
-)
-
-
 // An interface to manage generic structure objects persistently. Should use an
 // IDatastore as the interface that actually stores and retrieves the data from
 // an external source.
@@ -18,73 +11,3 @@ type IRepository[T IIdentifiable] interface {
     GetById(id uint)                    (T, error)
     GetByCriteria(c ISearchCriteria[T]) ([]T, error)
 }
-
-
-// --- default implementation ---
-
-type DefaultRepository[T IIdentifiable] struct {
-    ds      IDatastore
-    prefix  string
-}
-
-func NewDefaultRepository[T IIdentifiable](ds IDatastore, prefix string) *DefaultRepository[T] {
-    return &DefaultRepository[T]{ ds: ds, prefix: prefix }
-}
-
-// Creates a new entry in the repository with the given object t. Throws an
-// error if there already exists an entry with the same id, the json encoding
-// fails or the connection to the IDatastore fails.
-func (repo *DefaultRepository[T]) Create(t T) error {
-
-    key := repo.prefix + ":" + strconv.FormatUint(uint64(t.Id()), 10)
-    exists, err := repo.ds.KeyExists(key)
-    if err != nil { return err }
-    if exists { return errors.New("key already exits") }
-
-    d, err := json.Marshal(t)
-    if err != nil { return err }
-    
-    err = repo.ds.Set(key, string(d))
-    if err != nil { return err }
-
-    return nil
-}
-
-// Updates the entry with the same id as t in the repository with the values of
-// t. Trows an error if the json encoding fails or the connection to the
-// IDatastore fails.
-func (repo *DefaultRepository[T]) Update(t T) error {
-
-    key := repo.prefix + ":" + strconv.FormatUint(uint64(t.Id()), 10)
-    exists, err := repo.ds.KeyExists(key)
-    if err != nil { return err }
-    if !exists { return errors.New("key does not exits") }
-
-    d, err := json.Marshal(t)
-    if err != nil { return err }
-    
-    err = repo.ds.Set(key, string(d))
-    if err != nil { return err }
-
-    return nil
-}
-
-func (repo *DefaultRepository[T]) Delete(t T) error {
-    // TODO
-    return nil
-}
-
-func (repo *DefaultRepository[T]) GetAll() ([]T, error) {
-    // TODO
-    return nil, nil
-}
-
-func (repo *DefaultRepository[T]) GetById(id uint) (T, error) {
-    // TODO
-    return *new(T), nil
-}
-
-func (repo *DefaultRepository[T]) GetByCriteria(c ISearchCriteria[T]) ([]T, error) {
-    // TODO
-    return nil, nil
-}