private validateSubnets()

in src/main.ts [211:230]

• 18 lines of code
• 5 McCabe index (conditional complexity)

  private validateSubnets(vpc: ec2.IVpc, vpcSubnets: ec2.SubnetSelection) {
    const subnets = vpc.selectSubnets(vpcSubnets);
    // get all subnets in the VPC
    const allsubnetIds = vpc.publicSubnets.concat(vpc.privateSubnets).concat(vpc.isolatedSubnets).map(x => x.subnetId);
    // validate the given subnets
    subnets.subnetIds.forEach(s => {
      if (!allsubnetIds.includes(s)) {
        throw new Error(`${s} does not exist in the VPC`);
      }
      if (vpc.isolatedSubnets.map(i => i.subnetId).includes(s)) {
        throw new Error(`Isolated subnet ${s} is not allowed`);
      }
    });
    const hasPublic = subnets.subnetIds.some(s => new Set(vpc.publicSubnets.map(x => x.subnetId)).has(s));
    const hasPrivate = subnets.subnetIds.some(s => new Set(vpc.privateSubnets.map(x => x.subnetId)).has(s));
    if (hasPublic && hasPrivate) {
      throw new Error('You should provide either all public or all private subnets, not both.');
    }
    this.isPublicSubnets = subnets.subnetIds.some(s => new Set(vpc.publicSubnets.map(x => x.subnetId)).has(s));
  }