Add backend foundation and config-driven workbench

backend/internal/service/entry_service.go

@@ -0,0 +1,79 @@
+package service
+
+import (
+	"context"
+	"net/http"
+	"strings"
+
+	"cmr-backend/internal/apperr"
+	"cmr-backend/internal/store/postgres"
+)
+
+type EntryService struct {
+	store *postgres.Store
+}
+
+type ResolveEntryInput struct {
+	ChannelCode   string
+	ChannelType   string
+	PlatformAppID string
+	TenantCode    string
+}
+
+type ResolveEntryResult struct {
+	Tenant struct {
+		ID   string `json:"id"`
+		Code string `json:"code"`
+		Name string `json:"name"`
+	} `json:"tenant"`
+	Channel struct {
+		ID            string  `json:"id"`
+		Code          string  `json:"code"`
+		Type          string  `json:"type"`
+		PlatformAppID *string `json:"platformAppId,omitempty"`
+		DisplayName   string  `json:"displayName"`
+		Status        string  `json:"status"`
+		IsDefault     bool    `json:"isDefault"`
+	} `json:"channel"`
+}
+
+func NewEntryService(store *postgres.Store) *EntryService {
+	return &EntryService{store: store}
+}
+
+func (s *EntryService) Resolve(ctx context.Context, input ResolveEntryInput) (*ResolveEntryResult, error) {
+	input.ChannelCode = strings.TrimSpace(input.ChannelCode)
+	input.ChannelType = strings.TrimSpace(input.ChannelType)
+	input.PlatformAppID = strings.TrimSpace(input.PlatformAppID)
+	input.TenantCode = strings.TrimSpace(input.TenantCode)
+
+	if input.ChannelCode == "" && input.PlatformAppID == "" {
+		return nil, apperr.New(http.StatusBadRequest, "invalid_params", "channelCode or platformAppId is required")
+	}
+
+	entry, err := s.store.FindEntryChannel(ctx, postgres.FindEntryChannelParams{
+		ChannelCode:   input.ChannelCode,
+		ChannelType:   input.ChannelType,
+		PlatformAppID: input.PlatformAppID,
+		TenantCode:    input.TenantCode,
+	})
+	if err != nil {
+		return nil, err
+	}
+	if entry == nil {
+		return nil, apperr.New(http.StatusNotFound, "entry_channel_not_found", "entry channel not found")
+	}
+
+	result := &ResolveEntryResult{}
+	result.Tenant.ID = entry.TenantID
+	result.Tenant.Code = entry.TenantCode
+	result.Tenant.Name = entry.TenantName
+	result.Channel.ID = entry.ID
+	result.Channel.Code = entry.ChannelCode
+	result.Channel.Type = entry.ChannelType
+	result.Channel.PlatformAppID = entry.PlatformAppID
+	result.Channel.DisplayName = entry.DisplayName
+	result.Channel.Status = entry.Status
+	result.Channel.IsDefault = entry.IsDefault
+	return result, nil
+}