tsk-29: Place restrictions on adding scheduled message event (#30)

Closes #29

Reviewed-on: phoenix/textsender-api#30
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

internal/store/mock/mock_store.go

@@ -9,7 +9,6 @@ import (
 
 	"git.kundeng.us/phoenix/textsender-models/pkg/contact"
 	"git.kundeng.us/phoenix/textsender-models/pkg/message"
-	"git.kundeng.us/phoenix/textsender-models/pkg/message/scheduling"
 )
 
 type Key struct {
@@ -201,40 +200,3 @@ func (m *MockMessageStore) MessageExists(ctx context.Context, msg *message.Messa
 
 	return exists, nil
 }
-
-type ScheduledMessageKey struct {
-	UserId uuid.UUID
-}
-
-type MockScheduledMessageStore struct {
-	ScheduledMessages      map[uuid.UUID]*scheduling.ScheduledMessage
-	ScheduledMessagesByKey map[ScheduledMessageKey]*scheduling.ScheduledMessage
-	mu                     sync.RWMutex
-	Error                  error // Optional: simulate errors
-}
-
-func NewMockScheduledMessageStore() *MockScheduledMessageStore {
-	return &MockScheduledMessageStore{
-		ScheduledMessages:      make(map[uuid.UUID]*scheduling.ScheduledMessage),
-		ScheduledMessagesByKey: make(map[ScheduledMessageKey]*scheduling.ScheduledMessage),
-	}
-}
-
-func (m *MockScheduledMessageStore) CreateScheduledMessage(ctx context.Context, schedMsg *scheduling.ScheduledMessage) error {
-	m.mu.Lock()
-	defer m.mu.Unlock()
-
-	if m.Error != nil {
-		return m.Error
-	}
-
-	if schedMsg.Id == uuid.Nil {
-		schedMsg.Id = uuid.New()
-	}
-
-	key := ScheduledMessageKey{UserId: schedMsg.UserId}
-
-	m.ScheduledMessages[schedMsg.Id] = schedMsg
-	m.ScheduledMessagesByKey[key] = schedMsg
-	return nil
-}

internal/store/mock/scheduled_message_store.go

@@ -0,0 +1,67 @@
+package mock
+
+import (
+	"context"
+	"fmt"
+	"sync"
+
+	"github.com/google/uuid"
+
+	"git.kundeng.us/phoenix/textsender-models/pkg/message/scheduling"
+)
+
+type ScheduledMessageKey struct {
+	UserId uuid.UUID
+}
+
+type MockScheduledMessageStore struct {
+	ScheduledMessages      map[uuid.UUID]*scheduling.ScheduledMessage
+	ScheduledMessagesByKey map[ScheduledMessageKey]*scheduling.ScheduledMessage
+	mu                     sync.RWMutex
+	Error                  error // Optional: simulate errors
+}
+
+func NewMockScheduledMessageStore() *MockScheduledMessageStore {
+	return &MockScheduledMessageStore{
+		ScheduledMessages:      make(map[uuid.UUID]*scheduling.ScheduledMessage),
+		ScheduledMessagesByKey: make(map[ScheduledMessageKey]*scheduling.ScheduledMessage),
+	}
+}
+
+func (m *MockScheduledMessageStore) Get(ctx context.Context, id uuid.UUID) (*scheduling.ScheduledMessage, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if m.Error != nil {
+		return nil, m.Error
+	}
+
+	if id == uuid.Nil {
+		return nil, fmt.Errorf("Id is nil")
+	} else {
+		if schMsg := m.ScheduledMessages[id]; schMsg != nil {
+			return schMsg, nil
+		} else {
+			return nil, fmt.Errorf("Scheduled message does not exist")
+		}
+	}
+}
+
+func (m *MockScheduledMessageStore) CreateScheduledMessage(ctx context.Context, schedMsg *scheduling.ScheduledMessage) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if m.Error != nil {
+		return m.Error
+	}
+
+	if schedMsg.Id == uuid.Nil {
+		schedMsg.Id = uuid.New()
+	}
+
+	key := ScheduledMessageKey{UserId: schedMsg.UserId}
+
+	m.ScheduledMessages[schedMsg.Id] = schedMsg
+	m.ScheduledMessagesByKey[key] = schedMsg
+	return nil
+}

internal/store/scheduled_message_store.go

@@ -2,13 +2,17 @@ package store
 
 import (
 	"context"
+	"fmt"
 
+	"github.com/google/uuid"
+	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"
 
 	"git.kundeng.us/phoenix/textsender-models/pkg/message/scheduling"
 )
 
 type ScheduledMessageStore interface {
+	Get(ctx context.Context, id uuid.UUID) (*scheduling.ScheduledMessage, error)
 	CreateScheduledMessage(ctx context.Context, schedMsg *scheduling.ScheduledMessage) error
 }
 
@@ -20,6 +24,25 @@ func NewScheduledMessageStore(db *pgxpool.Pool) *PGScheduledMessageStore {
 	return &PGScheduledMessageStore{db: db}
 }
 
+func (s *PGScheduledMessageStore) Get(ctx context.Context, id uuid.UUID) (*scheduling.ScheduledMessage, error) {
+	query := `
+		SELECT id, scheduled, created, status, user_id FROM scheduled_messages WHERE id = $1
+	`
+
+	var schMsg scheduling.ScheduledMessage
+	err := s.db.QueryRow(ctx, query, id).Scan(
+		&schMsg.Id, &schMsg.Scheduled, &schMsg.Created, &schMsg.Status, &schMsg.UserId,
+	)
+
+	if err == pgx.ErrNoRows {
+		return nil, fmt.Errorf("No rows")
+	} else if err != nil {
+		return nil, fmt.Errorf("Getting scheduled message: %w", err)
+	}
+
+	return &schMsg, nil
+}
+
 func (s *PGScheduledMessageStore) CreateScheduledMessage(ctx context.Context, schedMsg *scheduling.ScheduledMessage) error {
 	query := `
 		INSERT INTO scheduled_messages (scheduled, status, user_id)