# All files / modules/billing/services plans.service.ts

97.22% Statements 35/36
88.88% Branches 32/36
100% Functions 8/8
96.96% Lines 32/33

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     import { Injectable, NotFoundException } from '@nestjs/common';
    import { InjectRepository } from '@nestjs/typeorm';
    import { Repository } from 'typeorm';
    import { Plan } from '../entities/plan.entity';
    import { PlanResponseDto, PlanDetailResponseDto } from '../dto/plan-response.dto';

    @Injectable()
    export class PlansService {
      constructor(
        @InjectRepository(Plan)
        private readonly planRepo: Repository<Plan>,
      ) {}

      /**
       * Get all visible and active plans
       * Returns plans ordered by sort_order ascending
       */
      async findAll(): Promise<PlanResponseDto[]> {
        const plans = await this.planRepo.find({
          where: {
            is_active: true,
            is_visible: true,
          },
          order: {
            sort_order: 'ASC',
          },
        });

        return plans.map((plan) => this.toResponseDto(plan));
      }

      /**
       * Get a single plan by ID
       * Returns detailed plan information including features
       */
      async findOne(id: string): Promise<PlanDetailResponseDto> {
        const plan = await this.planRepo.findOne({
          where: { id },
        });

        if (!plan) {
          throw new NotFoundException(`Plan with ID "${id}" not found`);
        }

        return this.toDetailResponseDto(plan);
      }

      /**
       * Get a single plan by slug
       * Returns detailed plan information including features
       */
      async findBySlug(slug: string): Promise<PlanDetailResponseDto> {
        const plan = await this.planRepo.findOne({
          where: { slug },
        });

        if (!plan) {
          throw new NotFoundException(`Plan with slug "${slug}" not found`);
        }

        return this.toDetailResponseDto(plan);
      }

      /**
       * Transform Plan entity to PlanResponseDto
       * Extracts feature descriptions from the features array
       */
      private toResponseDto(plan: Plan): PlanResponseDto {
        // Extract feature descriptions from the features array
        // The entity has features as Array<{ name, value, highlight }>
        // Frontend expects features as string[]
        const featureDescriptions = this.extractFeatureDescriptions(plan);

        return {
          id: plan.id,
          name: plan.name,
          slug: plan.slug,
          display_name: plan.name, // Use name as display_name
          description: plan.description || '',
          tagline: plan.tagline || undefined,
          price_monthly: plan.price_monthly ? Number(plan.price_monthly) : 0,
          price_yearly: plan.price_yearly ? Number(plan.price_yearly) : 0,
          currency: plan.currency,
          features: featureDescriptions,
          limits: plan.limits || undefined,
          is_popular: plan.is_popular || undefined,
          trial_days: plan.trial_days || undefined,
        };
      }

      /**
       * Transform Plan entity to PlanDetailResponseDto
       * Includes additional fields like is_enterprise and detailed_features
       */
      private toDetailResponseDto(plan: Plan): PlanDetailResponseDto {
        const baseDto = this.toResponseDto(plan);

        return {
          ...baseDto,
          is_enterprise: plan.is_enterprise || undefined,
          detailed_features: plan.features || undefined,
          metadata: plan.metadata || undefined,
        };
      }

      /**
       * Extract feature descriptions from plan
       * Combines features array and included_features array
       */
      private extractFeatureDescriptions(plan: Plan): string[] {
        const descriptions: string[] = [];

        // Add features from the features array (name or value as description)
        if (plan.features && Array.isArray(plan.features)) {
          for (const feature of plan.features) {
            if (typeof feature === 'object' && feature.name) {
              // For boolean values, just use the name
              // For string values, combine name and value
              if (typeof feature.value === 'boolean') {
                if (feature.value) {
                  descriptions.push(feature.name);
                }
              } else if (typeof feature.value === 'string') {
                descriptions.push(`${feature.name}: ${feature.value}`);
              } else E{
                descriptions.push(feature.name);
              }
            }
          }
        }

        // Add included_features as-is (they are already strings)
        if (plan.included_features && Array.isArray(plan.included_features)) {
          descriptions.push(...plan.included_features);
        }

        return descriptions;
      }
    }