feat: make max-calls of schedule nullable

internal/schedule/service.go

@@ -77,8 +77,8 @@ func (s *Service) Create(ctx context.Context, userID string, req CreateRequest)
 		return Schedule{}, err
 	}
 	maxCalls := pgtype.Int4{Valid: false}
-	if req.MaxCalls != nil {
-		maxCalls = pgtype.Int4{Int32: int32(*req.MaxCalls), Valid: true}
+	if req.MaxCalls.Set && req.MaxCalls.Value != nil {
+		maxCalls = pgtype.Int4{Int32: int32(*req.MaxCalls.Value), Valid: true}
 	}
 	enabled := true
 	if req.Enabled != nil {
@@ -164,8 +164,12 @@ func (s *Service) Update(ctx context.Context, id string, req UpdateRequest) (Sch
 		command = *req.Command
 	}
 	maxCalls := existing.MaxCalls
-	if req.MaxCalls != nil {
-		maxCalls = pgtype.Int4{Int32: int32(*req.MaxCalls), Valid: true}
+	if req.MaxCalls.Set {
+		if req.MaxCalls.Value == nil {
+			maxCalls = pgtype.Int4{Valid: false}
+		} else {
+			maxCalls = pgtype.Int4{Int32: int32(*req.MaxCalls.Value), Valid: true}
+		}
 	}
 	enabled := existing.Enabled
 	if req.Enabled != nil {

internal/schedule/types.go

@@ -1,6 +1,9 @@
 package schedule
 
-import "time"
+import (
+	"encoding/json"
+	"time"
+)
 
 type Schedule struct {
 	ID           string    `json:"id"`
@@ -16,11 +19,41 @@ type Schedule struct {
 	UserID       string    `json:"user_id"`
 }
 
+type NullableInt struct {
+	Value *int
+	Set   bool
+}
+
+func (n NullableInt) IsZero() bool {
+	return !n.Set
+}
+
+func (n NullableInt) MarshalJSON() ([]byte, error) {
+	if !n.Set || n.Value == nil {
+		return []byte("null"), nil
+	}
+	return json.Marshal(*n.Value)
+}
+
+func (n *NullableInt) UnmarshalJSON(data []byte) error {
+	n.Set = true
+	if string(data) == "null" {
+		n.Value = nil
+		return nil
+	}
+	var value int
+	if err := json.Unmarshal(data, &value); err != nil {
+		return err
+	}
+	n.Value = &value
+	return nil
+}
+
 type CreateRequest struct {
 	Name        string `json:"name"`
 	Description string `json:"description"`
 	Pattern     string `json:"pattern"`
-	MaxCalls    *int   `json:"max_calls,omitempty"`
+	MaxCalls    NullableInt `json:"max_calls,omitempty"`
 	Command     string `json:"command"`
 	Enabled     *bool  `json:"enabled,omitempty"`
 }
@@ -29,7 +62,7 @@ type UpdateRequest struct {
 	Name        *string `json:"name,omitempty"`
 	Description *string `json:"description,omitempty"`
 	Pattern     *string `json:"pattern,omitempty"`
-	MaxCalls    *int    `json:"max_calls,omitempty"`
+	MaxCalls    NullableInt `json:"max_calls,omitempty"`
 	Command     *string `json:"command,omitempty"`
 	Enabled     *bool   `json:"enabled,omitempty"`
 }