Update quiz using file store

models/models_test.go

@@ -0,0 +1,18 @@
+package models
+
+import (
+	"testing"
+
+	"github.com/remogatto/prettytest"
+)
+
+type testSuite struct {
+	prettytest.Suite
+}
+
+func TestRunner(t *testing.T) {
+	prettytest.Run(
+		t,
+		new(testSuite),
+	)
+}

store/file/file.go

@@ -8,6 +8,8 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"sync"
+	"time"
 
 	"git.andreafazzi.eu/andrea/probo/client"
 	"git.andreafazzi.eu/andrea/probo/hasher/sha256"
@@ -20,16 +22,30 @@ type FileProboCollectorStore struct {
 
 	memoryStore *memory.MemoryProboCollectorStore
 	paths       map[string]string
+
+	// A mutex is used to synchronize read/write access to the map
+	lock sync.RWMutex
 }
 
 func NewFileProboCollectorStore(dirname string) (*FileProboCollectorStore, error) {
 	s := new(FileProboCollectorStore)
 
-	files, err := ioutil.ReadDir(dirname)
+	s.Dir = dirname
+
+	err := s.Reindex()
 	if err != nil {
 		return nil, err
 	}
 
+	return s, nil
+}
+
+func (s *FileProboCollectorStore) Reindex() error {
+	files, err := ioutil.ReadDir(s.Dir)
+	if err != nil {
+		return err
+	}
+
 	s.paths = make(map[string]string)
 
 	markdownFiles := make([]fs.FileInfo, 0)
@@ -42,7 +58,7 @@ func NewFileProboCollectorStore(dirname string) (*FileProboCollectorStore, error
 	}
 
 	if len(markdownFiles) == 0 {
-		return nil, fmt.Errorf("The directory is empty.")
+		return fmt.Errorf("The directory is empty.")
 	}
 
 	s.memoryStore = memory.NewMemoryProboCollectorStore(
@@ -51,24 +67,27 @@ func NewFileProboCollectorStore(dirname string) (*FileProboCollectorStore, error
 
 	for _, file := range markdownFiles {
 		filename := file.Name()
-		fullPath := filepath.Join(dirname, filename)
+		fullPath := filepath.Join(s.Dir, filename)
 
 		content, err := os.ReadFile(fullPath)
 		if err != nil {
-			return nil, err
+			return err
 		}
 		quiz, err := QuizFromMarkdown(string(content))
 		if err != nil {
-			return nil, err
+			return err
 		}
-		s.memoryStore.CreateQuiz(&client.CreateUpdateQuizRequest{
+		q, err := s.memoryStore.CreateQuiz(&client.CreateUpdateQuizRequest{
 			Quiz: quiz,
 		})
+		if err != nil {
+			return err
 		}
 
-	s.Dir = dirname
+		s.SetPath(q, fullPath)
+	}
 
-	return s, nil
+	return nil
 }
 
 func (s *FileProboCollectorStore) ReadAllQuizzes() ([]*models.Quiz, error) {
@@ -86,7 +105,12 @@ func (s *FileProboCollectorStore) CreateQuiz(r *client.CreateUpdateQuizRequest)
 		return nil, err
 	}
 
-	return quiz, nil
+	err = s.Reindex()
+	if err != nil {
+		return nil, err
+	}
+
+	return s.memoryStore.ReadQuizByHash(quiz.Hash)
 }
 
 func (s *FileProboCollectorStore) UpdateQuiz(r *client.CreateUpdateQuizRequest, id string) (*models.Quiz, error) {
@@ -95,7 +119,35 @@ func (s *FileProboCollectorStore) UpdateQuiz(r *client.CreateUpdateQuizRequest,
 		return nil, err
 	}
 
-	return quiz, nil
+	err = s.createOrUpdateMarkdownFile(quiz)
+	if err != nil {
+		return nil, err
+	}
+
+	err = s.Reindex()
+	if err != nil {
+		return nil, err
+	}
+
+	return s.memoryStore.ReadQuizByHash(quiz.Hash)
+}
+
+func (s *FileProboCollectorStore) GetPath(quiz *models.Quiz) (string, error) {
+	s.lock.RLock()
+	defer s.lock.RUnlock()
+
+	path, ok := s.paths[quiz.ID]
+	if !ok {
+		return "", errors.New(fmt.Sprintf("Path not found for quiz ID %v", quiz.ID))
+	}
+	return path, nil
+}
+
+func (s *FileProboCollectorStore) SetPath(quiz *models.Quiz, path string) string {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+	s.paths[quiz.ID] = path
+	return path
 }
 
 func MarkdownFromQuiz(quiz *models.Quiz) (string, error) {
@@ -103,20 +155,22 @@ func MarkdownFromQuiz(quiz *models.Quiz) (string, error) {
 		return "", errors.New("Quiz should contain a question but it wasn't provided.")
 	}
 
-	if len(quiz.Answers) == 0 {
+	if len(quiz.Answers) < 2 {
 		return "", errors.New("Quiz should contain at least 2 answers but none was provided.")
 	}
 
 	if quiz.Correct == nil {
-		return "", errors.New("Quiz should contain a correct answer but non was provided.")
+		return "", errors.New("Quiz should contain a correct answer but not was provided.")
 	}
 
 	correctAnswer := "* " + quiz.Correct.Text
 	var otherAnswers string
 
 	for _, answer := range quiz.Answers {
+		if quiz.Correct != answer {
 			otherAnswers += "* " + answer.Text + "\n"
 		}
+	}
 
 	markdown := quiz.Question.Text + "\n\n" + correctAnswer + "\n" + otherAnswers
 
@@ -160,20 +214,21 @@ func QuizFromMarkdown(markdown string) (*client.Quiz, error) {
 }
 
 func (s *FileProboCollectorStore) createOrUpdateMarkdownFile(quiz *models.Quiz) error {
-	var filename string
-
 	markdown, err := MarkdownFromQuiz(quiz)
 	if err != nil {
 		return err
 	}
-	fn := s.paths[quiz.ID]
+
+	fn, _ := s.GetPath(quiz)
 	if fn == "" {
-		filename = filepath.Join(s.Dir, quiz.Hash+".md")
+		fn = filepath.Join(s.Dir, fmt.Sprintf("quiz_%v.%s", time.Now().Unix(), "md"))
 	}
-	file, err := os.Create(filename)
+
+	file, err := os.Create(fn)
 	if err != nil {
 		return err
 	}
+
 	defer file.Close()
 
 	_, err = file.Write([]byte(markdown))
@@ -181,20 +236,7 @@ func (s *FileProboCollectorStore) createOrUpdateMarkdownFile(quiz *models.Quiz)
 		return err
 	}
 
+	s.SetPath(quiz, fn)
+
 	return nil
 }
-
-// func (s *FileProboCollectorStore) writeMarkdownFile(quiz *models.Quiz) error {
-// 	markdown, err := MarkdownFromQuiz(quiz)
-// 	if err != nil {
-// 		return err
-// 	}
-
-// 	filename := filepath.Join(s.Dir, quiz.Hash+".md")
-// 	err = ioutil.WriteFile(filename, []byte(markdown), 0644)
-// 	if err != nil {
-// 		return err
-// 	}
-
-// 	return nil
-// }

store/file/file_test.go

@@ -3,12 +3,13 @@ package file
 import (
 	"fmt"
 	"os"
-	"path/filepath"
 	"reflect"
 	"testing"
 
 	"git.andreafazzi.eu/andrea/probo/client"
+	"git.andreafazzi.eu/andrea/probo/hasher/sha256"
 	"git.andreafazzi.eu/andrea/probo/models"
+	"git.andreafazzi.eu/andrea/probo/store/memory"
 	"github.com/remogatto/prettytest"
 )
 
@@ -54,7 +55,7 @@ Question text (3).
 }
 
 func (t *testSuite) TestReadAllQuizzes() {
-	store, err := NewFileProboCollectorStore("./test/quizzes")
+	store, err := NewFileProboCollectorStore("./testdata/quizzes")
 	t.True(err == nil, fmt.Sprintf("A file store should be initialized without problems but an error occurred: %v", err))
 
 	if !t.Failed() {
@@ -68,19 +69,14 @@ func (t *testSuite) TestReadAllQuizzes() {
 				len(result),
 				fmt.Sprintf("The store contains 3 files but only 2 should be parsed (duplicated quiz). Total of parsed quizzes are instead %v", len(result)),
 			)
-			t.Equal("Question text 1.", result[0].Question.Text)
 		}
 	}
 
 }
 
-func (t *testSuite) TestCreateQuiz() {
+func (t *testSuite) TestMarkdownFromQuiz() {
-	dirname := "./test/quizzes"
+	store := memory.NewMemoryProboCollectorStore(sha256.NewDefault256Hasher(sha256.DefaultSHA256HashingFn))
-	store, err := NewFileProboCollectorStore(dirname)
+	quiz, err := store.CreateQuiz(
-
-	t.True(err == nil, fmt.Sprintf("A file store should be initialized without problems but an error occurred: %v", err))
-
-	_, err = store.CreateQuiz(
 		&client.CreateUpdateQuizRequest{
 			Quiz: &client.Quiz{
 				Question: &client.Question{Text: "Newly created question text."},
@@ -92,25 +88,70 @@ func (t *testSuite) TestCreateQuiz() {
 				},
 			},
 		})
+	md, err := MarkdownFromQuiz(quiz)
+	t.Nil(err, "Conversion to markdown should not raise an error")
+	if !t.Failed() {
+		t.Equal(`Newly created question text.
+
+* Answer 1
+* Answer 2
+* Answer 3
+* Answer 4
+`, md)
+	}
+}
+
+func (t *testSuite) TestCreateQuiz() {
+	dirname := "./testdata/quizzes"
+	store, err := NewFileProboCollectorStore(dirname)
+
+	t.True(err == nil, fmt.Sprintf("A file store should be initialized without problems but an error occurred: %v", err))
+
+	if !t.Failed() {
+		clientQuiz := &client.Quiz{
+			Question: &client.Question{Text: "Newly created question text."},
+			Answers: []*client.Answer{
+				{Text: "Answer 1", Correct: true},
+				{Text: "Answer 2", Correct: false},
+				{Text: "Answer 3", Correct: false},
+				{Text: "Answer 4", Correct: false},
+			},
+		}
+		quiz, err := store.CreateQuiz(
+			&client.CreateUpdateQuizRequest{
+				Quiz: clientQuiz,
+			},
+		)
 
 		t.Nil(err, fmt.Sprintf("An error was raised when saving the quiz on disk: %v", err))
 
-	newFilename := filepath.Join(
+		if !t.Failed() {
-		dirname,
+			path, err := store.GetPath(quiz)
-		"94ed4e9cdf8e0a75a2c5ce925cb791ebc5977ce1801e12059f58ce4d66c0c7f6.md",
+			t.Nil(err, "GetPath should not raise an error.")
-	)
+
-	exists, err := os.Stat(newFilename)
+			if !t.Failed() {
+				exists, err := os.Stat(path)
 				t.Nil(err, "Stat should not return an error")
 
 				if !t.Failed() {
 					t.True(exists != nil, "The new quiz file was not created.")
-		err := os.Remove(newFilename)
+					if !t.Failed() {
-		t.Nil(err, "Stat should not return an error")
+						quizFromDisk, err := readQuizFromDisk(path)
+						t.Nil(err, "Quiz should be read from disk without errors.")
+						if !t.Failed() {
+							t.True(reflect.DeepEqual(quizFromDisk, clientQuiz), "Quiz read from disk and stored in memory should be equal.")
+							err := os.Remove(path)
+							t.Nil(err, "Test file should be removed without errors.")
+						}
+					}
+				}
+			}
+		}
 	}
 }
 
 func (t *testSuite) TestUpdateQuiz() {
-	dirname := "./test/quizzes"
+	dirname := "./testdata/quizzes"
 	store, err := NewFileProboCollectorStore(dirname)
 	t.True(err == nil, fmt.Sprintf("A file store should be initialized without problems but an error occurred: %v", err))
 
@@ -130,18 +171,40 @@ func (t *testSuite) TestUpdateQuiz() {
 		t.Nil(err, "The quiz to be updated should be created without issue")
 
 		if !t.Failed() {
-			_, err = store.UpdateQuiz(
+			clientQuiz := &client.Quiz{
-				&client.CreateUpdateQuizRequest{
+				Question: &client.Question{Text: "Newly created question text."},
-					Quiz: &client.Quiz{
-						Question: &client.Question{Text: "Updated question text."},
 				Answers: []*client.Answer{
 					{Text: "Answer 1", Correct: true},
 					{Text: "Answer 2", Correct: false},
 					{Text: "Answer 3", Correct: false},
 					{Text: "Answer 4", Correct: false},
 				},
-					},
+			}
+
+			updatedQuiz, err := store.UpdateQuiz(
+				&client.CreateUpdateQuizRequest{
+					Quiz: clientQuiz,
 				}, quiz.ID)
+
+			t.Nil(err, fmt.Sprintf("Quiz should be updated without errors: %v", err))
+
+			if !t.Failed() {
+				path, err := store.GetPath(updatedQuiz)
+
+				if !t.Failed() {
+					t.Nil(err, "GetPath should not raise an error.")
+
+					if !t.Failed() {
+						quizFromDisk, err := readQuizFromDisk(path)
+						t.Nil(err, "Quiz should be read from disk without errors.")
+						if !t.Failed() {
+							t.True(reflect.DeepEqual(clientQuiz, quizFromDisk), "Quiz should be updated.")
+							err := os.Remove(path)
+							t.Nil(err, "Stat should not return an error")
+						}
+					}
+				}
+			}
 		}
 	}
 
@@ -152,6 +215,14 @@ func createQuizOnDisk(store *FileProboCollectorStore, req *client.CreateUpdateQu
 
 }
 
+func readQuizFromDisk(path string) (*client.Quiz, error) {
+	content, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	return QuizFromMarkdown(string(content))
+}
+
 func testsAreEqual(got, want []*models.Quiz) bool {
 	return reflect.DeepEqual(got, want)
 }

store/file/test/quizzes/94ed4e9cdf8e0a75a2c5ce925cb791ebc5977ce1801e12059f58ce4d66c0c7f6.md

@@ -1,7 +0,0 @@
-Newly created question text.
-
-* Answer 1
-* Answer 1
-* Answer 2
-* Answer 3
-* Answer 4

store/memory/memory.go

@@ -124,7 +124,21 @@ func (s *MemoryProboCollectorStore) ReadAllQuizzes() ([]*models.Quiz, error) {
 	return result, nil
 }
 
+func (s *MemoryProboCollectorStore) ReadQuizByHash(hash string) (*models.Quiz, error) {
+	quiz := s.getQuizFromHash(hash)
+	if quiz == nil {
+		return nil, fmt.Errorf("Quiz with hash %s was not found in the store.", hash)
+	}
+	return quiz, nil
+}
+
+func (s *MemoryProboCollectorStore) CalculateQuizHash(quiz *client.Quiz) string {
+	hashes := s.hasher.QuizHashes(quiz)
+	return hashes[len(hashes)-1]
+}
+
 func (s *MemoryProboCollectorStore) createOrUpdateQuiz(r *client.CreateUpdateQuizRequest, id string) (*models.Quiz, error) {
+
 	hashes := s.hasher.QuizHashes(r.Quiz)
 	quizHash := hashes[len(hashes)-1]
 

store/memory/memory_test.go

@@ -0,0 +1,78 @@
+package memory
+
+import (
+	"reflect"
+	"testing"
+
+	"git.andreafazzi.eu/andrea/probo/client"
+	"git.andreafazzi.eu/andrea/probo/hasher/sha256"
+	"github.com/remogatto/prettytest"
+)
+
+type testSuite struct {
+	prettytest.Suite
+}
+
+func TestRunner(t *testing.T) {
+	prettytest.Run(
+		t,
+		new(testSuite),
+	)
+}
+
+func (t *testSuite) TestReadQuizByHash() {
+	store := NewMemoryProboCollectorStore(
+		sha256.NewDefault256Hasher(sha256.DefaultSHA256HashingFn),
+	)
+	quiz, _ := store.CreateQuiz(
+		&client.CreateUpdateQuizRequest{
+			Quiz: &client.Quiz{
+				Question: &client.Question{Text: "Newly created question text."},
+				Answers: []*client.Answer{
+					{Text: "Answer 1", Correct: true},
+					{Text: "Answer 2", Correct: false},
+					{Text: "Answer 3", Correct: false},
+					{Text: "Answer 4", Correct: false},
+				},
+			},
+		})
+	quizFromMemory, err := store.ReadQuizByHash(quiz.Hash)
+	t.Nil(err, "Quiz should be found in the store")
+	if !t.Failed() {
+		t.True(reflect.DeepEqual(quizFromMemory, quiz), "Quiz should be equal")
+	}
+
+}
+
+func (t *testSuite) TestUpdateQuiz() {
+	store := NewMemoryProboCollectorStore(
+		sha256.NewDefault256Hasher(sha256.DefaultSHA256HashingFn),
+	)
+	quiz, _ := store.CreateQuiz(
+		&client.CreateUpdateQuizRequest{
+			Quiz: &client.Quiz{
+				Question: &client.Question{Text: "Newly created question text."},
+				Answers: []*client.Answer{
+					{Text: "Answer 1", Correct: true},
+					{Text: "Answer 2", Correct: false},
+					{Text: "Answer 3", Correct: false},
+					{Text: "Answer 4", Correct: false},
+				},
+			},
+		})
+
+	updatedQuiz, _ := store.CreateQuiz(
+		&client.CreateUpdateQuizRequest{
+			Quiz: &client.Quiz{
+				Question: &client.Question{Text: "Updated question text."},
+				Answers: []*client.Answer{
+					{Text: "Answer 1", Correct: true},
+					{Text: "Answer 2", Correct: false},
+					{Text: "Answer 3", Correct: false},
+					{Text: "Answer 4", Correct: false},
+				},
+			},
+		})
+
+	t.True(quiz.Hash != updatedQuiz.Hash, "The two hashes should not be equal.")
+}

store/store.go

@@ -8,6 +8,8 @@ import (
 type ProboCollectorStore interface {
 	ReadAllQuizzes() ([]*models.Quiz, error)
 
+	ReadQuizByHash(hash string) (*models.Quiz, error)
+
 	CreateQuiz(r *client.CreateUpdateQuizRequest) (*models.Quiz, error)
 	UpdateQuiz(r *client.CreateUpdateQuizRequest, id string) (*models.Quiz, error)
 }