feat(ses): add constructs for email receiving (#1971)

Add constructs for email receiving.

Author: jogold

packages/@aws-cdk/aws-ses/README.md

@@ -1,2 +1,90 @@
 ## The CDK Construct Library for AWS Simple Email Service
 This module is part of the [AWS Cloud Development Kit](https://github.com/awslabs/aws-cdk) project.
+
+### Email receiving
+Create a receipt rule set with rules and actions:
+[example of setting up a receipt rule set](test/example.receiving.lit.ts)
+
+Alternatively, rules can be added to a rule set:
+```ts
+const ruleSet = new ses.ReceiptRuleSet(this, 'RuleSet'):
+
+const awsRule = ruleSet.addRule('Aws', {
+  recipients: ['aws.com']
+});
+```
+
+And actions to rules:
+```ts
+awsRule.addAction(
+  new ses.ReceiptRuleSnsAction({
+    topic
+  });
+);
+```
+When using `addRule`, the new rule is added after the last added rule unless `after` is specified.
+
+[More actions](test/integ.receipt.ts)
+
+#### Drop spams
+A rule to drop spam can be added by setting `dropSpam` to `true`:
+
+```ts
+new ses.ReceiptRuleSet(this, 'RuleSet', {
+  dropSpam: true
+});
+```
+
+This will add a rule at the top of the rule set with a Lambda action that stops processing messages that have at least one spam indicator. See [Lambda Function Examples](https://docs.aws.amazon.com/ses/latest/DeveloperGuide/receiving-email-action-lambda-example-functions.html).
+
+### Import and export receipt rule set and receipt rules
+Receipt rule sets and receipt rules can be exported:
+
+```ts
+const ruleSet = new ReceiptRuleSet(this, 'RuleSet');
+const rule = ruleSet.addRule(this, 'Rule', {
+  recipients: ['hello@mydomain.com']
+});
+
+const ruleSetRef = ruleSet.export();
+const ruleRef = rule.export();
+```
+
+And imported:
+```ts
+const importedRuleSet = ses.ReceiptRuleSet.import(this, 'ImportedRuleSet', ruleSetRef);
+
+const importedRule = ses.ReceiptRule.import(this, 'ImportedRule', ruleRef);
+
+const otherRule = ses.ReceiptRule.import(this, 'OtherRule', {
+  name: 'other-rule'
+});
+
+importedRuleSet.addRule('New', { // This rule is added after the imported rule
+  after: importedRule,
+  recipients: ['mydomain.com']
+});
+
+importedRuleSet.addRule('Extra', { // Added after the 'New' rule
+  recipients: ['extra.com']
+});
+```
+
+### Receipt filter
+Create a receipt filter:
+```ts
+new ses.ReceiptFilter(this, 'Filter', {
+  ip: '1.2.3.4/16' // Will be blocked
+})
+```
+
+A white list filter is also available:
+```ts
+new ses.WhiteListReceiptFilter(this, 'WhiteList', {
+  ips: [
+    '10.0.0.0/16',
+    '1.2.3.4/16',
+  ]
+});
+```
+This will first create a block all filter and then create allow filters for the listed ip addresses.

packages/@aws-cdk/aws-ses/lib/index.ts

@@ -1,2 +1,7 @@
+export * from './receipt-rule-set';
+export * from './receipt-rule';
+export * from './receipt-rule-action';
+export * from './receipt-filter';
+
 // AWS::SES CloudFormation Resources:
 export * from './ses.generated';

packages/@aws-cdk/aws-ses/lib/receipt-filter.ts

@@ -0,0 +1,91 @@
+import cdk = require('@aws-cdk/cdk');
+import { CfnReceiptFilter } from './ses.generated';
+
+/**
+ * The policy for the receipt filter.
+ */
+export enum ReceiptFilterPolicy {
+  /**
+   * Allow the ip address or range.
+   */
+  Allow = 'Allow',
+
+  /**
+   * Block the ip address or range.
+   */
+  Block = 'Block'
+}
+
+/**
+ * Construction properties for a ReceiptFilter.
+ */
+export interface ReceiptFilterProps {
+  /**
+   * The name for the receipt filter.
+   *
+   * @default a CloudFormation generated name
+   */
+  name?: string;
+
+  /**
+   * The ip address or range to filter.
+   *
+   * @default 0.0.0.0/0
+   */
+  ip?: string;
+
+  /**
+   * The policy for the filter.
+   *
+   * @default Block
+   */
+  policy?: ReceiptFilterPolicy;
+}
+
+/**
+ * A receipt filter. When instantiated without props, it creates a
+ * block all receipt filter.
+ */
+export class ReceiptFilter extends cdk.Construct {
+  constructor(scope: cdk.Construct, id: string, props?: ReceiptFilterProps) {
+    super(scope, id);
+
+    new CfnReceiptFilter(this, 'Resource', {
+      filter: {
+        ipFilter: {
+          cidr: (props && props.ip) || '0.0.0.0/0',
+          policy: (props && props.policy) || ReceiptFilterPolicy.Block
+        },
+        name: props ? props.name : undefined
+      }
+    });
+  }
+}
+
+/**
+ * Construction properties for a WhiteListReceiptFilter.
+ */
+export interface WhiteListReceiptFilterProps {
+  /**
+   * A list of ip addresses or ranges to white list.
+   */
+  ips: string[];
+}
+
+/**
+ * A white list receipt filter.
+ */
+export class WhiteListReceiptFilter extends cdk.Construct {
+  constructor(scope: cdk.Construct, id: string, props: WhiteListReceiptFilterProps) {
+    super(scope, id);
+
+    new ReceiptFilter(this, 'BlockAll');
+
+    props.ips.forEach(ip => {
+      new ReceiptFilter(this, `Allow${ip.replace(/[^\d]/g, '')}`, {
+        ip,
+        policy: ReceiptFilterPolicy.Allow
+      });
+    });
+  }
+}