feat:create service logic for campaign creation

donate_app/service/service.go

@@ -1 +1,91 @@
 package service
+
+
+
+
+import (
+    "context"
+    "errors"
+    "time"
+
+    "git.gocasts.ir/ebhomengo/niki/campaign/entity"
+    "git.gocasts.ir/ebhomengo/niki/repository"
+    richerror "git.gocasts.ir/ebhomengo/niki/pkg/rich_error"
+    "git.gocasts.ir/ebhomengo/niki/types"
+)
+
+
+
+
+type CampaignService struct {
+    repo           repository.CampaignRepository
+    participantRepo repository.CampaignParticipantRepository
+}
+
+
+type CampaignServiceInterface interface {
+    CreateCampaign(ctx context.Context, req CampaignRepository) (types.ID, error)
+}
+
+// NewCampaignService creates a new campaign service
+func NewCampaignService(
+    repo repository.CampaignRepository,
+    participantRepo repository.CampaignParticipantRepository,
+) *CampaignService {
+    return &CampaignService{
+        repo:           repo,
+        participantRepo: participantRepo,
+    }
+}
+
+
+// CreateCampaign creates a new campaign
+func (s *CampaignService) CreateCampaign(ctx context.Context, req CreateCampaignRequest) (types.ID, error) {
+    const Op = "service.campaign.create_campaign"
+
+    // Business Logic: Validation
+    if req.Title == "" {
+        return 0, richerror.New(Op).WithErr(errors.New("title is required"))
+    }
+
+    if req.GoalAmount <= 0 {
+        return 0, richerror.New(Op).WithErr(errors.New("goal_amount must be greater than 0"))
+    }
+
+    if req.AdminID == 0 {
+        return 0, richerror.New(Op).WithErr(errors.New("admin_id is required"))
+    }
+
+    // Business Logic: Validate status
+    validStatuses := map[string]bool{
+        "draft":     true,
+        "active":    true,
+        "completed": true,
+        "cancelled": true,
+    }
+
+    if !validStatuses[req.Status] {
+        return 0, richerror.New(Op).WithErr(errors.New("invalid status"))
+    }
+
+
+    // Create campaign entity
+    campaign := entity.Campaign{
+        Title:        req.Title,
+        Description:  req.Description,
+        GoalAmount:   req.GoalAmount,
+        RaisedAmount: 0, // Initially 0
+        Status:       entity.CampaignStatus(req.Status),
+        DeadlineAt:   req.DeadlineAt,
+        AdminID:      req.AdminID,
+        CreatedAt:    time.Now(),
+    }
+
+    // Call repository
+    campaignID, err := s.repo.CreateCampaign(ctx, campaign)
+    if err != nil {
+        return 0, richerror.New(Op).WithErr(err)
+    }
+
+    return campaignID, nil
+}