Add TemplatesAPI for the paginated /api/templates endpoints

[izikaj]

Motivation

Mailtrap now serves a conventions-compliant templates API at /api/templates (and /api/accounts/{account_id}/templates): every response is wrapped in a data envelope, the list is paginated with token / per_page, and write bodies are flat. The existing /api/email_templates surface keeps its published shape and stays the stable way to manage templates.

This adds the new surface as a sibling resource rather than widening the existing one, because widening would change every return type for current callers. The old surface is not deprecated yet: the new endpoints are experimental, and the old list returns every template while the new one returns one page. It can be deprecated when /api/templates leaves experimental.

Changes

• Add Mailtrap::TemplatesAPI for /api/accounts/{id}/templates: list(per_page:, token:) returns TemplatesListResponse (data + pagination), get/create/update return Mailtrap::Template, delete returns nil; bodies are flat
• Add examples/templates_api.rb and README rows

How to test

You'll need an account API token and the account id.

• List — Mailtrap::TemplatesAPI.new(account_id, client).list(per_page: 1) returns one template in data and pagination[:next_token] when more exist; list(per_page: 1, token: 2) returns the next page
• Create / get / update / delete — create(name:, subject:, category:, body_html:) returns a Mailtrap::Template with an id; get, update(id, subject: 'x') and delete (returns nil) follow; get after delete raises Mailtrap::Error
• Unknown option — create(foo: 1) raises ArgumentError before any request
• Old surface — Mailtrap::EmailTemplatesAPI behaves as before

Summary by CodeRabbit

• New Features
  • Added support for managing account email templates, including creating, listing, retrieving, updating, and deleting templates.
  • Template listings include pagination details, with options to control page size and navigation.
  • Added a Ruby example demonstrating template management.
• Documentation
  • Clarified the distinction between the experimental Templates API and the Email Templates API.

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📥 Commits

Reviewing files that changed from the base of the PR and between be244ea and 8678062.

📒 Files selected for processing (3)

• README.md
• examples/templates_api.rb
• lib/mailtrap/templates_api.rb

🚧 Files skipped from review as they are similar to previous changes (2)

• lib/mailtrap/templates_api.rb
• README.md

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📝 Walkthrough

Walkthrough

This change adds Mailtrap::TemplatesAPI with template response types and list, get, create, update, and delete operations. It loads the API through the library, adds an example, and updates the README entries.

Changes

Templates API

Layer / File(s)	Summary
Template types and operations lib/mailtrap/template.rb, lib/mailtrap/templates_api.rb, spec/mailtrap/template_spec.rb, spec/mailtrap/templates_api_spec.rb	Adds template and paginated-list response types and account template operations. Specs cover responses, pagination, request bodies, and error cases.
Library exposure and usage example lib/mailtrap.rb, examples/templates_api.rb, README.md	Loads TemplatesAPI through the library, demonstrates template operations, and separates the experimental Templates API entry from the Email Templates API entry.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Feature

Merge Risk: 🟡 Moderate · up to 86780

Verify that the account-scoped templates endpoint is served before merging; otherwise the new API operations may fail at runtime.

Security Architecture Review

Security architecture risk: 🔵 Low · up to 86780

The new API reuses existing authentication and request handling while preserving current callers’ contracts. No introduced security bypass was established, but the experimental endpoint’s authorization and mutation guarantees have not been independently verified.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The new surface can read, create, modify, and delete remote template content using the configured credential. Although paths name an account, the maximum independently reachable account and asset scope depends on server-side authorization; client path construction alone does not prove tenant isolation.

Trust Boundaries and Controls

• observed — The SDK sends caller-selected identities and template content across the authenticated service boundary. Writable option names are restricted locally, but required-field semantics and account ownership are not enforced by these client declarations. The existing email-template API uses the same identity and validation pattern.

Resilience and Maintainability Implications

• observed — New writes and deletion retain the existing single-request delegation and error behavior, without introducing an SDK retry or compensation loop. Local specifications exercise validation failures, response mapping, and HTTP 204 deletion, but do not establish server atomicity, interruption recovery, or cleanup of dependent state.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 71.43% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 7 functions across 8 files. (1 skipped: 1…	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly describes the main change: adding TemplatesAPI for the paginated templates endpoints.
Description check	✅ Passed	The description includes the required Motivation, Changes, and How to test sections. It explains the API changes and provides manual test steps. The Images and GIFs section is missing, but it is not c…

Full details: Docstring Coverage

Explanation

Docstring coverage is 71.43% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 7 functions across 8 files. (1 skipped: 1 unsupported.)

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Inline comments:
Review comments at @lib/mailtrap/templates_api.rb:
- Line 82: Update TemplatesAPI#base_path to use a route explicitly supported by
the published API contract, such as /api/email_templates, and ensure the class
does not expose operations through the undocumented account-scoped route; if no
supported route fits these operations, defer exposing the class until the API
contract is updated.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: Repository: mailtrap/mailtrap-ruby/.coderabbit.yaml
• Review profile: CHILL
• Plan: Advanced
• Run ID: 1c0e02e0-7a99-41dd-bdda-daf954b9b9ce

📥 Commits

Reviewing files that changed from the base of the PR and between 88aab08 and be244ea.

📒 Files selected for processing (9)

• README.md
• examples/templates_api.rb
• lib/mailtrap.rb
• lib/mailtrap/email_template.rb
• lib/mailtrap/email_templates_api.rb
• lib/mailtrap/template.rb
• lib/mailtrap/templates_api.rb
• spec/mailtrap/template_spec.rb
• spec/mailtrap/templates_api_spec.rb

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