complete rule engine and booking flow

apps/edr-freight-api/src/modules/rule-engine/services/shipping-lines.service.ts

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+import { ConflictException, Inject, Injectable, NotFoundException } from '@nestjs/common';
+import { CreateShippingLineDto } from '../dto/create-shipping-line.dto';
+import { UpdateShippingLineDto } from '../dto/update-shipping-line.dto';
+import { ShippingLine } from '../entities/shipping-line.entity';
+import {
+  IShippingLinesRepository,
+  SHIPPING_LINES_REPOSITORY,
+} from '../interfaces/shipping-lines.repository.interface';
+
+@Injectable()
+export class ShippingLinesService {
+  constructor(
+    @Inject(SHIPPING_LINES_REPOSITORY)
+    private readonly repository: IShippingLinesRepository,
+  ) {}
+
+  /** List shipping lines with pagination. */
+  async findAll(filter: {
+    isActive?: boolean;
+    page?: number;
+    pageSize?: number;
+  }): Promise<{ data: ShippingLine[]; meta: { total: number; page: number; pageSize: number; totalPages: number } }> {
+    const page = filter.page ?? 1;
+    const pageSize = filter.pageSize ?? 20;
+    const where: Record<string, unknown> = {};
+    if (filter.isActive !== undefined) where.isActive = filter.isActive;
+
+    const [data, total] = await this.repository.findAndCount({
+      where,
+      order: { code: 'ASC' },
+      skip: (page - 1) * pageSize,
+      take: pageSize,
+    });
+    return { data, meta: { total, page, pageSize, totalPages: Math.ceil(total / pageSize) } };
+  }
+
+  /** Get a shipping line by ID. */
+  async findById(id: string): Promise<ShippingLine> {
+    const entity = await this.repository.findById(id);
+    if (!entity) throw new NotFoundException(`Shipping line ${id} not found`);
+    return entity;
+  }
+
+  /** Create a shipping line. */
+  async create(dto: CreateShippingLineDto): Promise<ShippingLine> {
+    const existing = await this.repository.findByCode(dto.code);
+    if (existing) throw new ConflictException(`Shipping line with code "${dto.code}" already exists`);
+    return this.repository.create({
+      code: dto.code,
+      label: dto.label,
+      mappedToCode: dto.mappedToCode,
+      showExtraFeeNotice: dto.showExtraFeeNotice ?? false,
+      isActive: dto.isActive ?? true,
+    });
+  }
+
+  /** Update a shipping line. */
+  async update(id: string, dto: UpdateShippingLineDto): Promise<ShippingLine> {
+    await this.findById(id);
+    if (dto.code) {
+      const conflict = await this.repository.findByCode(dto.code);
+      if (conflict && conflict.id !== id) {
+        throw new ConflictException(`Shipping line with code "${dto.code}" already exists`);
+      }
+    }
+    const updated = await this.repository.update(id, dto);
+    if (!updated) throw new NotFoundException(`Shipping line ${id} not found`);
+    return updated;
+  }
+
+  /** Soft-delete a shipping line. */
+  async remove(id: string): Promise<void> {
+    await this.findById(id);
+    await this.repository.softDelete(id);
+  }
+}