feat: implement mail module

[joshunrau]

Summary by CodeRabbit

• New Features

  • Introduced robust email support, enabling smooth email notifications and integrations with improved configuration and error handling.

• Tests

  • Added comprehensive tests to validate email functionality, covering both successful operations and error scenarios.
  • Included configuration stubs to ensure consistent behavior of the email service.

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

The pull request introduces email functionality by adding Nodemailer and its type definitions to the project. It extends the API via new exports in the main index file for mail configuration, module, and service elements. A complete mail module is built with dedicated configuration, module, and service files that implement email sending using a Nodemailer transporter with proper error handling. Additionally, test suites and a stub for module options have been added to ensure that both synchronous and asynchronous configurations of the mail module behave as expected.

Changes

File(s)	Change Summary
package.json	Added new dependencies: nodemailer@^6.10.0 and @types/nodemailer@^6.4.17.
src/index.ts	Exported new mail entities: MailModuleOptions, MailModule, and MailService.
src/modules/mail/__tests__/*.ts	Introduced test suites for MailModule and MailService along with a stub file (mail-module-options.stub.ts) for mail module options.
src/modules/mail/mail.config.ts	Added configuration options for mail module, including MailModuleOptions, ConfigurableMailModule, and MAIL_MODULE_OPTIONS_TOKEN.
src/modules/mail/mail.module.ts	Introduced MailModule that provides and exports MailService.
src/modules/mail/mail.service.ts	Created MailService class with sendMail method for sending emails using Nodemailer.

Sequence Diagram(s)

sequenceDiagram
    participant App as Application
    participant Mail as MailService
    participant Trans as Nodemailer Transporter
    participant SMTP as SMTP Server

    App->>Mail: sendMail(mailOptions)
    Mail->>Trans: createTransport(configuration)
    Mail->>Trans: sendMail(mailOptions)
    Trans->>SMTP: Process Email
    SMTP-->>Trans: Return response/error
    Trans-->>Mail: Mail sent result/error
    Mail-->>App: Return success/error result

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Possibly related PRs

• feat: implement mail module #26: The changes in the main PR are directly related to those in the retrieved PR, as both involve the addition of the same dependencies in package.json and the introduction of the MailModule, MailService, and related configurations and tests in the mail module files.

Poem

I'm a rabbit in a code garden so bright,
Hopping along with each mail sent in flight.
Nodemailer and tests make my ears perk high,
As mail modules and stubs help bugs say goodbye.
With joyful hops and bytes so merry,
My whiskers twitch—this change is extraordinary!
🐇🌟

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📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 3460901 and 7d7bf3d.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (8)

• package.json (2 hunks)
• src/index.ts (1 hunks)
• src/modules/mail/__tests__/mail.module.spec.ts (1 hunks)
• src/modules/mail/__tests__/mail.service.spec.ts (1 hunks)
• src/modules/mail/__tests__/stubs/mail-module-options.stub.ts (1 hunks)
• src/modules/mail/mail.config.ts (1 hunks)
• src/modules/mail/mail.module.ts (1 hunks)
• src/modules/mail/mail.service.ts (1 hunks)

✨ Finishing Touches

• 📝 Generate Docstrings

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[github-actions]

🎉 This PR is included in version 3.2.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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