feat: initialize backend database schema and implement audit logging system with core service modules

database/schema.sql

@@ -21,6 +21,33 @@ CREATE SCHEMA IF NOT EXISTS tenant;
 CREATE SCHEMA IF NOT EXISTS masters;
 CREATE SCHEMA IF NOT EXISTS cohort;
 CREATE SCHEMA IF NOT EXISTS policy_engine;
+CREATE SCHEMA IF NOT EXISTS audit;
+CREATE SCHEMA IF NOT EXISTS recovery_incident;
+
+-- ─── Audit Logs ──────────────────────────────────────────────────────────────
+
+CREATE TABLE IF NOT EXISTS audit.tbl_audit_logs (
+  id            UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  tenant_id     VARCHAR(255) NOT NULL,
+  module        VARCHAR(100) NOT NULL,
+  action        VARCHAR(50)  NOT NULL,
+  entity_id     VARCHAR(255),
+  entity_label  VARCHAR(255),
+  before        JSONB,
+  after         JSONB,
+  performed_by  VARCHAR(255),
+  ip_address    VARCHAR(50),
+  user_agent    TEXT,
+  created_at    TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS idx_audit_tenant    ON audit.tbl_audit_logs (tenant_id);
+CREATE INDEX IF NOT EXISTS idx_audit_module    ON audit.tbl_audit_logs (module);
+CREATE INDEX IF NOT EXISTS idx_audit_action    ON audit.tbl_audit_logs (action);
+CREATE INDEX IF NOT EXISTS idx_audit_entity    ON audit.tbl_audit_logs (entity_id);
+CREATE INDEX IF NOT EXISTS idx_audit_createdat ON audit.tbl_audit_logs (created_at DESC);
+
+
 
 -- ─── Enum Types ─────────────────────────────────────────────────────────────
 

src/app.module.ts

@@ -1,4 +1,5 @@
 import { MiddlewareConsumer, Module, NestModule } from '@nestjs/common';
+import { APP_INTERCEPTOR } from '@nestjs/core';
 import { ConfigModule } from '@nestjs/config';
 import { DatabaseModule } from './database/database.module';
 import { HealthModule } from './modules/health/health.module';
@@ -8,6 +9,8 @@ import { TenantModule } from './modules/tenant/tenant.module';
 import { TenantMiddleware } from './common/tenant/tenant.middleware';
 import { PolicyEngineModule } from './modules/policy-engine/policy-engine.module';
 import { RecoveryIncidentModule } from './modules/recovery-incident/recovery-incident.module';
+import { AuditLogModule } from './modules/audit-log/audit-log.module';
+import { AuditInterceptor } from './common/interceptors/audit.interceptor';
 
 const env = process.env.NODE_ENV;
 const envFilePath = env ? [`.env.${env}`, '.env.local', '.env'] : ['.env.local', '.env'];
@@ -25,6 +28,13 @@ const envFilePath = env ? [`.env.${env}`, '.env.local', '.env'] : ['.env.local',
     CohortModule,
     PolicyEngineModule,
     RecoveryIncidentModule,
+    AuditLogModule,
+  ],
+  providers: [
+    {
+      provide: APP_INTERCEPTOR,
+      useClass: AuditInterceptor,
+    },
   ],
 })
 export class AppModule implements NestModule {

src/common/interceptors/audit.interceptor.ts

@@ -0,0 +1,88 @@
+import {
+  CallHandler,
+  ExecutionContext,
+  Injectable,
+  NestInterceptor,
+  Logger,
+} from '@nestjs/common';
+import { Observable } from 'rxjs';
+import { tap } from 'rxjs/operators';
+import { Request } from 'express';
+import { AuditLogService } from '../../modules/audit-log/audit-log.service';
+
+// Methods that mutate data — only these are audited
+const MUTABLE_METHODS = ['POST', 'PUT', 'PATCH', 'DELETE'];
+
+// Map: [HTTP method, URL pattern] → { module, action }
+// The interceptor only handles CREATE (POST) since UPDATE/DELETE
+// need before-snapshots which are captured directly in each service.
+const MODULE_MAP: Array<{ pattern: RegExp; module: string }> = [
+  { pattern: /policy-engine/, module: 'policy-engine' },
+  { pattern: /recovery-incidents/, module: 'recovery-incident' },
+  { pattern: /cohort/, module: 'cohort' },
+  { pattern: /master-data/, module: 'master-data' },
+];
+
+function resolveModule(url: string): string {
+  for (const entry of MODULE_MAP) {
+    if (entry.pattern.test(url)) return entry.module;
+  }
+  return 'unknown';
+}
+
+function resolveAction(method: string, url: string): string {
+  if (method === 'POST') return 'CREATE';
+  if (method === 'DELETE') return 'DELETE';
+  if (method === 'PATCH' && url.includes('/status')) return 'STATUS_CHANGE';
+  if (method === 'PATCH' || method === 'PUT') return 'UPDATE';
+  return method;
+}
+
+@Injectable()
+export class AuditInterceptor implements NestInterceptor {
+  private readonly logger = new Logger(AuditInterceptor.name);
+
+  constructor(private readonly auditLogService: AuditLogService) {}
+
+  intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
+    const req = context.switchToHttp().getRequest<Request>();
+    const { method, ip, headers } = req;
+    const url = req.originalUrl || req.url;
+
+    // Only intercept CREATE (POST) — UPDATE/DELETE handled in services
+    if (!MUTABLE_METHODS.includes(method) || method !== 'POST') {
+      return next.handle();
+    }
+
+    const module = resolveModule(url);
+    const action = resolveAction(method, url);
+    const userAgent = headers['user-agent'] ?? '';
+    const tenantId = (headers['x-tenant-id'] as string) ?? 'unknown';
+
+    this.logger.debug(`Intercepted ${method} ${url} -> Module: ${module}, Action: ${action}`);
+
+    return next.handle().pipe(
+      tap({
+        next: async (responseData: any) => {
+          this.logger.debug(`Writing audit log for ${module} ${action}...`);
+          try {
+            await this.auditLogService.log({
+              module,
+              action,
+              entityId: responseData?.id ?? undefined,
+              entityLabel: responseData?.name ?? responseData?.recoveryCode ?? responseData?.flightNumber ?? undefined,
+              before: undefined, // no before on CREATE
+              after: responseData ?? undefined,
+              performedBy: tenantId,
+              ipAddress: ip,
+              userAgent: String(userAgent),
+            });
+          } catch (err) {
+            // Never let audit failure break the main request
+            this.logger.warn(`Audit log failed for ${method} ${url}: ${err}`);
+          }
+        },
+      }),
+    );
+  }
+}

src/database/database.module.ts

@@ -35,6 +35,7 @@ import { ConfigModule, ConfigService } from '@nestjs/config';
         await dataSource.query(`CREATE SCHEMA IF NOT EXISTS "cohort";`);
         await dataSource.query(`CREATE SCHEMA IF NOT EXISTS "policy_engine";`);
         await dataSource.query(`CREATE SCHEMA IF NOT EXISTS "recovery_incident";`);
+        await dataSource.query(`CREATE SCHEMA IF NOT EXISTS "audit";`);
 
         // Run synchronization manually if it was enabled
         if (options.synchronize) {

src/modules/audit-log/audit-log.controller.ts

@@ -0,0 +1,47 @@
+import {
+  Controller,
+  Get,
+  Param,
+  Query,
+  NotFoundException,
+} from '@nestjs/common';
+import { ApiTags, ApiOperation } from '@nestjs/swagger';
+import { AuditLogService } from './audit-log.service';
+
+@ApiTags('Audit Logs')
+@Controller('audit-logs')
+export class AuditLogController {
+  constructor(private readonly auditLogService: AuditLogService) {}
+
+  @Get()
+  @ApiOperation({ summary: 'Get paginated audit logs with optional filters' })
+  findAll(
+    @Query('page') page: string = '1',
+    @Query('limit') limit: string = '20',
+    @Query('module') module?: string,
+    @Query('action') action?: string,
+    @Query('entityId') entityId?: string,
+    @Query('dateFrom') dateFrom?: string,
+    @Query('dateTo') dateTo?: string,
+  ) {
+    return this.auditLogService.findAll({
+      page: Number(page),
+      limit: Number(limit),
+      module,
+      action,
+      entityId,
+      dateFrom,
+      dateTo,
+    });
+  }
+
+  @Get(':id')
+  @ApiOperation({ summary: 'Get a single audit log entry by ID' })
+  async findOne(@Param('id') id: string) {
+    const log = await this.auditLogService.findOne(id);
+    if (!log) {
+      throw new NotFoundException(`Audit log entry ${id} not found`);
+    }
+    return log;
+  }
+}

src/modules/audit-log/audit-log.module.ts

@@ -0,0 +1,13 @@
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { AuditLog } from './entities/audit-log.entity';
+import { AuditLogService } from './audit-log.service';
+import { AuditLogController } from './audit-log.controller';
+
+@Module({
+  imports: [TypeOrmModule.forFeature([AuditLog])],
+  controllers: [AuditLogController],
+  providers: [AuditLogService],
+  exports: [AuditLogService], // exported so other modules can inject it
+})
+export class AuditLogModule {}

src/modules/audit-log/audit-log.service.ts

@@ -0,0 +1,80 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository, FindOptionsWhere, Between, MoreThanOrEqual, LessThanOrEqual } from 'typeorm';
+import { AuditLog } from './entities/audit-log.entity';
+import { CreateAuditLogDto } from './dto/create-audit-log.dto';
+import { getTenantIdOrNull } from '../../common/tenant/tenant.context';
+
+@Injectable()
+export class AuditLogService {
+  constructor(
+    @InjectRepository(AuditLog)
+    private readonly auditLogRepository: Repository<AuditLog>,
+  ) {}
+
+  // ─── Write a single audit entry ──────────────────────────────────────────
+  // Called directly from services (for UPDATE/DELETE with before snapshots)
+  // and from the HTTP interceptor (for CREATE).
+  async log(dto: CreateAuditLogDto): Promise<void> {
+    const tenantId = getTenantIdOrNull() ?? dto.performedBy ?? 'system';
+    const entry = this.auditLogRepository.create({
+      ...dto,
+      tenantId,
+      performedBy: dto.performedBy ?? tenantId,
+    });
+    await this.auditLogRepository.save(entry);
+  }
+
+  // ─── Paginated query with filters ────────────────────────────────────────
+  async findAll(options: {
+    page?: number;
+    limit?: number;
+    module?: string;
+    action?: string;
+    entityId?: string;
+    dateFrom?: string;
+    dateTo?: string;
+  }) {
+    const { page = 1, limit = 20, module, action, entityId, dateFrom, dateTo } = options;
+    const skip = (page - 1) * limit;
+    const tenantId = getTenantIdOrNull();
+
+    const where: FindOptionsWhere<AuditLog> = {};
+
+    if (tenantId) where.tenantId = tenantId;
+    if (module) where.module = module;
+    if (action) where.action = action;
+    if (entityId) where.entityId = entityId;
+
+    if (dateFrom && dateTo) {
+      where.createdAt = Between(new Date(dateFrom), new Date(dateTo)) as any;
+    } else if (dateFrom) {
+      where.createdAt = MoreThanOrEqual(new Date(dateFrom)) as any;
+    } else if (dateTo) {
+      where.createdAt = LessThanOrEqual(new Date(dateTo)) as any;
+    }
+
+    const [data, total] = await this.auditLogRepository.findAndCount({
+      where,
+      skip,
+      take: limit,
+      order: { createdAt: 'DESC' },
+    });
+
+    return {
+      data,
+      total,
+      page,
+      limit,
+      totalPages: Math.ceil(total / limit),
+    };
+  }
+
+  // ─── Single entry lookup ──────────────────────────────────────────────────
+  async findOne(id: string): Promise<AuditLog | null> {
+    const tenantId = getTenantIdOrNull();
+    const where: FindOptionsWhere<AuditLog> = { id };
+    if (tenantId) where.tenantId = tenantId;
+    return this.auditLogRepository.findOne({ where });
+  }
+}

src/modules/audit-log/dto/create-audit-log.dto.ts

@@ -0,0 +1,39 @@
+import { IsString, IsNotEmpty, IsOptional, IsObject } from 'class-validator';
+
+export class CreateAuditLogDto {
+  @IsString()
+  @IsNotEmpty()
+  module: string;
+
+  @IsString()
+  @IsNotEmpty()
+  action: string;
+
+  @IsString()
+  @IsOptional()
+  entityId?: string;
+
+  @IsString()
+  @IsOptional()
+  entityLabel?: string;
+
+  @IsObject()
+  @IsOptional()
+  before?: Record<string, any>;
+
+  @IsObject()
+  @IsOptional()
+  after?: Record<string, any>;
+
+  @IsString()
+  @IsOptional()
+  performedBy?: string;
+
+  @IsString()
+  @IsOptional()
+  ipAddress?: string;
+
+  @IsString()
+  @IsOptional()
+  userAgent?: string;
+}

src/modules/audit-log/entities/audit-log.entity.ts

@@ -0,0 +1,45 @@
+import {
+  Entity,
+  Column,
+  PrimaryGeneratedColumn,
+  CreateDateColumn,
+} from 'typeorm';
+
+@Entity({ name: 'tbl_audit_logs', schema: 'audit' })
+export class AuditLog {
+  @PrimaryGeneratedColumn('uuid')
+  id!: string;
+
+  @Column({ name: 'tenant_id', type: 'varchar', length: 255 })
+  tenantId!: string;
+
+  @Column({ type: 'varchar', length: 100 })
+  module!: string; // 'policy-engine' | 'recovery-incident' | 'cohort' | 'master-data'
+
+  @Column({ type: 'varchar', length: 50 })
+  action!: string; // 'CREATE' | 'UPDATE' | 'DELETE' | 'STATUS_CHANGE'
+
+  @Column({ name: 'entity_id', type: 'varchar', length: 255, nullable: true })
+  entityId?: string;
+
+  @Column({ name: 'entity_label', type: 'varchar', length: 255, nullable: true })
+  entityLabel?: string; // human-readable name (policy name, flight #, etc.)
+
+  @Column({ type: 'jsonb', nullable: true })
+  before?: Record<string, any>; // snapshot before change (null for CREATE)
+
+  @Column({ type: 'jsonb', nullable: true })
+  after?: Record<string, any>; // snapshot after change (null for DELETE)
+
+  @Column({ name: 'performed_by', type: 'varchar', length: 255, nullable: true })
+  performedBy?: string; // tenantId for now; will be userId when auth is added
+
+  @Column({ name: 'ip_address', type: 'varchar', length: 50, nullable: true })
+  ipAddress?: string;
+
+  @Column({ name: 'user_agent', type: 'text', nullable: true })
+  userAgent?: string;
+
+  @CreateDateColumn({ name: 'created_at' })
+  createdAt!: Date;
+}

src/modules/cohort/cohort.module.ts

@@ -3,9 +3,10 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 import { CohortController } from './cohort.controller';
 import { CohortService } from './cohort.service';
 import { Cohort } from './cohort.entity';
+import { AuditLogModule } from '../audit-log/audit-log.module';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([Cohort])],
+  imports: [TypeOrmModule.forFeature([Cohort]), AuditLogModule],
   controllers: [CohortController],
   providers: [CohortService],
   exports: [CohortService],

src/modules/cohort/cohort.service.ts

@@ -5,12 +5,14 @@ import { getTenantId } from '../../common/tenant/tenant.context';
 import { Cohort } from './cohort.entity';
 import { CreateCohortDto } from './dto/create-cohort.dto';
 import { UpdateCohortDto } from './dto/update-cohort.dto';
+import { AuditLogService } from '../audit-log/audit-log.service';
 
 @Injectable()
 export class CohortService {
   constructor(
     @InjectRepository(Cohort)
     private readonly cohortRepository: Repository<Cohort>,
+    private readonly auditLogService: AuditLogService,
   ) {}
 
   private mapDtoToEntity(dto: CreateCohortDto | UpdateCohortDto) {
@@ -96,19 +98,56 @@ export class CohortService {
 
   async update(id: string, updateCohortDto: UpdateCohortDto): Promise<Cohort> {
     const cohort = await this.findOne(id);
+    const beforeSnapshot = { ...cohort };
     const mappedData = this.mapDtoToEntity(updateCohortDto);
     Object.assign(cohort, mappedData);
-    return this.cohortRepository.save(cohort);
+    const after = await this.cohortRepository.save(cohort);
+
+    await this.auditLogService.log({
+      module: 'cohort',
+      action: 'UPDATE',
+      entityId: id,
+      entityLabel: cohort.name,
+      before: beforeSnapshot,
+      after: { ...after },
+      performedBy: getTenantId(),
+    });
+
+    return after;
   }
 
   async updateStatus(id: string, status: string): Promise<Cohort> {
     const cohort = await this.findOne(id);
+    const beforeStatus = cohort.status;
     cohort.status = status;
-    return this.cohortRepository.save(cohort);
+    const after = await this.cohortRepository.save(cohort);
+
+    await this.auditLogService.log({
+      module: 'cohort',
+      action: 'STATUS_CHANGE',
+      entityId: id,
+      entityLabel: cohort.name,
+      before: { status: beforeStatus },
+      after: { status },
+      performedBy: getTenantId(),
+    });
+
+    return after;
   }
 
   async remove(id: string): Promise<void> {
     const cohort = await this.findOne(id);
+    const beforeSnapshot = { ...cohort };
     await this.cohortRepository.remove(cohort);
+
+    await this.auditLogService.log({
+      module: 'cohort',
+      action: 'DELETE',
+      entityId: id,
+      entityLabel: beforeSnapshot.name,
+      before: beforeSnapshot,
+      after: undefined,
+      performedBy: getTenantId(),
+    });
   }
 }

src/modules/policy-engine/policy-engine.module.ts

@@ -9,6 +9,7 @@ import { RuleCondition } from './entities/rule-condition.entity';
 import { PolicyAction } from './entities/policy-action.entity';
 import { PolicyActionValue } from './entities/policy-action-value.entity';
 import { MasterDataModule } from '../master-data/master-data.module';
+import { AuditLogModule } from '../audit-log/audit-log.module';
 
 @Module({
   imports: [
@@ -21,6 +22,7 @@ import { MasterDataModule } from '../master-data/master-data.module';
       PolicyActionValue,
     ]),
     MasterDataModule,
+    AuditLogModule,
   ],
   controllers: [PolicyEngineController],
   providers: [PolicyEngineService],
@@ -28,3 +30,4 @@ import { MasterDataModule } from '../master-data/master-data.module';
 })
 export class PolicyEngineModule { }
 
+

src/modules/policy-engine/policy-engine.service.ts

@@ -12,6 +12,7 @@ import { CreatePolicyDto } from './dto/create-policy.dto';
 import { UpdatePolicyDto } from './dto/update-policy.dto';
 import { PolicyStatus, AudienceType } from './entities/policy.enums';
 import { Jurisdiction } from '../master-data/entities/jurisdiction.entity';
+import { AuditLogService } from '../audit-log/audit-log.service';
 
 @Injectable()
 export class PolicyEngineService {
@@ -20,6 +21,7 @@ export class PolicyEngineService {
     private readonly policyRepository: Repository<Policy>,
     @InjectRepository(Jurisdiction)
     private readonly jurisdictionRepository: Repository<Jurisdiction>,
+    private readonly auditLogService: AuditLogService,
   ) {}
 
   private getRelations() {
@@ -41,15 +43,13 @@ export class PolicyEngineService {
 
   async create(createPolicyDto: CreatePolicyDto): Promise<Policy> {
     const tenantId = getTenantId();
-    
-    // Create the policy entity and cascade nested associations using TypeORM
     const policy = this.policyRepository.create({
       ...createPolicyDto,
       tenantId,
     });
-    
     const saved = await this.policyRepository.save(policy);
     return this.findOne(saved.id);
+    // CREATE is logged automatically by AuditInterceptor (POST handler)
   }
 
   async findAll(
@@ -62,12 +62,8 @@ export class PolicyEngineService {
     const tenantId = getTenantId();
 
     const whereClause: any = { tenantId };
-    if (status) {
-      whereClause.status = status;
-    }
-    if (audienceType) {
-      whereClause.audienceType = audienceType;
-    }
+    if (status) whereClause.status = status;
+    if (audienceType) whereClause.audienceType = audienceType;
 
     const [data, total] = await this.policyRepository.findAndCount({
       where: whereClause,
@@ -101,41 +97,32 @@ export class PolicyEngineService {
   }
 
   async update(id: string, updatePolicyDto: UpdatePolicyDto): Promise<Policy> {
-    // Ensure policy exists and belongs to the tenant
-    await this.findOne(id);
+    // Capture before snapshot
+    const before = await this.findOne(id);
+    const beforeSnapshot = { ...before };
 
     const { targetAudiences, rules, ...policyData } = updatePolicyDto;
 
-    // Execute database operations in a transaction for clean replacement of nested objects
-    return this.policyRepository.manager.transaction(async (transactionalEntityManager) => {
-      // 1. Delete all existing target audiences associated with this policy
+    const after = await this.policyRepository.manager.transaction(async (transactionalEntityManager) => {
       await transactionalEntityManager.delete(PolicyTargetAudience, { policyId: id });
 
-      // 2. Find and delete existing rules (cascades to conditions and actions/values)
       const existingRules = await transactionalEntityManager.find(PolicyRule, { where: { policyId: id } });
       if (existingRules.length > 0) {
         await transactionalEntityManager.remove(PolicyRule, existingRules);
       }
 
-      // 3. Fetch original policy again in transaction to ensure we have a fresh copy
       const policy = await transactionalEntityManager.findOneOrFail(Policy, {
         where: { id, tenantId: getTenantId() },
       });
 
-      // 4. Update policy basic columns
       Object.assign(policy, policyData);
 
-      // 5. Build new Target Audience entities if provided
       if (targetAudiences) {
         policy.targetAudiences = targetAudiences.map((target) =>
-          transactionalEntityManager.create(PolicyTargetAudience, {
-            ...target,
-            policyId: id,
-          }),
+          transactionalEntityManager.create(PolicyTargetAudience, { ...target, policyId: id }),
         );
       }
 
-      // 6. Build new Policy Rule entities with Conditions and Actions if provided
       if (rules) {
         policy.rules = rules.map((ruleDto) => {
           const conditions = ruleDto.conditions?.map((cond) =>
@@ -146,7 +133,6 @@ export class PolicyEngineService {
             const values = act.values?.map((val) =>
               transactionalEntityManager.create(PolicyActionValue, val),
             ) || [];
-
             return transactionalEntityManager.create(PolicyAction, {
               actionTypeId: act.actionTypeId,
               sequence: act.sequence,
@@ -164,25 +150,61 @@ export class PolicyEngineService {
         });
       }
 
-      // 7. Save updated policy and cascades
       const savedPolicy = await transactionalEntityManager.save(Policy, policy);
-
-      // Reload updated policy with all relations and return
       return transactionalEntityManager.findOneOrFail(Policy, {
         where: { id: savedPolicy.id },
         relations: this.getRelations(),
       });
     });
+
+    // Log UPDATE with before/after snapshots
+    await this.auditLogService.log({
+      module: 'policy-engine',
+      action: 'UPDATE',
+      entityId: id,
+      entityLabel: (before as any).name ?? id,
+      before: beforeSnapshot,
+      after: { ...after },
+      performedBy: getTenantId(),
+    });
+
+    return after;
   }
 
   async updateStatus(id: string, status: PolicyStatus): Promise<Policy> {
     const policy = await this.findOne(id);
+    const beforeStatus = policy.status;
+
     policy.status = status;
-    return this.policyRepository.save(policy);
+    const after = await this.policyRepository.save(policy);
+
+    await this.auditLogService.log({
+      module: 'policy-engine',
+      action: 'STATUS_CHANGE',
+      entityId: id,
+      entityLabel: (policy as any).name ?? id,
+      before: { status: beforeStatus },
+      after: { status },
+      performedBy: getTenantId(),
+    });
+
+    return after;
   }
 
   async remove(id: string): Promise<void> {
     const policy = await this.findOne(id);
+    const beforeSnapshot = { ...policy };
+
     await this.policyRepository.remove(policy);
+
+    await this.auditLogService.log({
+      module: 'policy-engine',
+      action: 'DELETE',
+      entityId: id,
+      entityLabel: (beforeSnapshot as any).name ?? id,
+      before: beforeSnapshot,
+      after: undefined,
+      performedBy: getTenantId(),
+    });
   }
 }

src/modules/recovery-incident/recovery-incident.module.ts

@@ -3,9 +3,10 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 import { RecoveryIncidentService } from './recovery-incident.service';
 import { RecoveryIncidentController } from './recovery-incident.controller';
 import { RecoveryIncident } from './entities/recovery-incident.entity';
+import { AuditLogModule } from '../audit-log/audit-log.module';
 
 @Module({
-  imports: [TypeOrmModule.forFeature([RecoveryIncident])],
+  imports: [TypeOrmModule.forFeature([RecoveryIncident]), AuditLogModule],
   controllers: [RecoveryIncidentController],
   providers: [RecoveryIncidentService],
   exports: [RecoveryIncidentService],

src/modules/recovery-incident/recovery-incident.service.ts

@@ -1,16 +1,18 @@
-import { Injectable, NotFoundException } from '@nestjs/common';
+import { Injectable, NotFoundException, HttpException, HttpStatus } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { Repository } from 'typeorm';
 import { RecoveryIncident } from './entities/recovery-incident.entity';
 import { CreateRecoveryIncidentDto } from './dto/create-recovery-incident.dto';
 import { UpdateRecoveryIncidentDto } from './dto/update-recovery-incident.dto';
 import { getTenantId } from '../../common/tenant/tenant.context';
+import { AuditLogService } from '../audit-log/audit-log.service';
 
 @Injectable()
 export class RecoveryIncidentService {
   constructor(
     @InjectRepository(RecoveryIncident)
     private readonly recoveryIncidentRepo: Repository<RecoveryIncident>,
+    private readonly auditLogService: AuditLogService,
   ) {}
 
   async create(createDto: CreateRecoveryIncidentDto): Promise<RecoveryIncident> {
@@ -21,6 +23,7 @@ export class RecoveryIncidentService {
       tenantId,
     });
     return this.recoveryIncidentRepo.save(incident);
+    // CREATE is logged automatically by AuditInterceptor (POST handler)
   }
 
   async findAll(): Promise<RecoveryIncident[]> {
@@ -36,28 +39,90 @@ export class RecoveryIncidentService {
     const incident = await this.recoveryIncidentRepo.findOne({
       where: { id, tenantId },
     });
-    
+
     if (!incident) {
       throw new NotFoundException(`RecoveryIncident with ID ${id} not found`);
     }
-    
+
     return incident;
   }
 
   async update(id: string, updateDto: UpdateRecoveryIncidentDto): Promise<RecoveryIncident> {
-    const incident = await this.findOne(id);
-    
+    const before = await this.findOne(id);
+    const beforeSnapshot = { ...before };
+
     const updateData: any = { ...updateDto };
     if (updateDto.date) {
       updateData.date = new Date(updateDto.date);
     }
 
-    Object.assign(incident, updateData);
-    return this.recoveryIncidentRepo.save(incident);
+    Object.assign(before, updateData);
+    const after = await this.recoveryIncidentRepo.save(before);
+
+    // Log UPDATE with before/after snapshots
+    await this.auditLogService.log({
+      module: 'recovery-incident',
+      action: 'UPDATE',
+      entityId: id,
+      entityLabel: before.recoveryCode ?? before.flightNumber,
+      before: beforeSnapshot,
+      after: { ...after },
+      performedBy: getTenantId(),
+    });
+
+    return after;
   }
 
   async remove(id: string): Promise<void> {
     const incident = await this.findOne(id);
+    const beforeSnapshot = { ...incident };
+
     await this.recoveryIncidentRepo.remove(incident);
+
+    // Log DELETE — before = deleted record, after = null
+    await this.auditLogService.log({
+      module: 'recovery-incident',
+      action: 'DELETE',
+      entityId: id,
+      entityLabel: beforeSnapshot.recoveryCode ?? beforeSnapshot.flightNumber,
+      before: beforeSnapshot,
+      after: undefined,
+      performedBy: getTenantId(),
+    });
+  }
+
+  // ─── AviationStack proxy ──────────────────────────────────────────────────
+  async flightLookup(flightIata: string): Promise<any> {
+    const apiKey = process.env.AVIATION_STACK_API_KEY;
+    if (!apiKey) {
+      throw new HttpException('AviationStack API key not configured', HttpStatus.INTERNAL_SERVER_ERROR);
+    }
+
+    const url = `http://api.aviationstack.com/v1/flights?access_key=${apiKey}&flight_iata=${encodeURIComponent(flightIata.trim())}&limit=1`;
+
+    try {
+      const response = await fetch(url);
+      if (!response.ok) {
+        throw new HttpException(
+          `AviationStack responded with ${response.status}`,
+          HttpStatus.BAD_GATEWAY,
+        );
+      }
+
+      const json = await response.json();
+
+      if (json.error) {
+        throw new HttpException(json.error.info || 'AviationStack error', HttpStatus.BAD_GATEWAY);
+      }
+
+      const flights: any[] = json.data ?? [];
+      return flights.length > 0 ? flights[0] : null;
+    } catch (err: any) {
+      if (err instanceof HttpException) throw err;
+      throw new HttpException(
+        `Failed to reach AviationStack: ${err.message}`,
+        HttpStatus.BAD_GATEWAY,
+      );
+    }
   }
 }