probo/store/memory/memory.go

package memory

import (
	"errors"
	"sync"

	"git.andreafazzi.eu/andrea/probo/hasher"
	"git.andreafazzi.eu/andrea/probo/models"
)

type MemoryProboCollectorStore struct {

	// IDs maps
	quizzes      map[string]*models.Quiz
	collections  map[string]*models.Collection
	participants map[string]*models.Participant

	// Hashes maps
	questionsHashes map[string]*models.Question
	answersHashes   map[string]*models.Answer
	quizzesHashes   map[string]*models.Quiz

	hasher hasher.Hasher

	// A mutex is used to synchronize read/write access to the map
	lock sync.RWMutex
}

func NewMemoryProboCollectorStore(hasher hasher.Hasher) *MemoryProboCollectorStore {
	s := new(MemoryProboCollectorStore)

	s.hasher = hasher

	s.questionsHashes = make(map[string]*models.Question)
	s.answersHashes = make(map[string]*models.Answer)
	s.quizzesHashes = make(map[string]*models.Quiz)

	s.quizzes = make(map[string]*models.Quiz)
	s.collections = make(map[string]*models.Collection)
	s.participants = make(map[string]*models.Participant)

	return s
}

func Create[T any](s *MemoryProboCollectorStore, elem *T) (*T, error) {
	if elem == nil {
		return nil, errors.New("A creation request was made passing a nil element")
	}

	// Check for duplicates
	hashes := s.hasher.QuizHashes(r.Quiz)
	quizHash := hashes[len(hashes)-1]

	quiz := s.getQuizFromHash(quizHash)
	if quiz != nil { // Quiz is already present in the store
		return quiz, false, nil
	}

}