Add templates_api 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 live, but it is scheduled for removal once the new one leaves experimental status.

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 client.templates_api.templates (PaginatedTemplatesApi) for /api/accounts/{id}/templates: get_list(TemplateListParams(per_page, token)) returns TemplateListResponse (data + pagination), get/create/update return Template, delete returns DeletedObject; bodies are flat
  • Pagination is reused from mailtrap.models.common
• Add examples/paginated_templates/templates.py and README rows

How to test

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

• List — client.templates_api.templates.get_list(mt.TemplateListParams(per_page=1)) returns one item in .data and .pagination.next_token when more exist; get_list(mt.TemplateListParams(per_page=1, token=2)) returns the next page
• Create / get / update / delete — create(mt.CreateTemplateParams(name=, subject=, category=, body_html=)) returns a Template with an id; get_by_id, update(id, mt.UpdateTemplateParams(subject=...)) and delete follow; get_by_id after delete raises APIError
• Empty update — mt.UpdateTemplateParams() raises ValueError
• Old surface — client.email_templates_api.templates emits no warning and still returns a bare list

Summary by CodeRabbit

• New Features
  • Added an experimental Templates API for account-scoped template management: list templates with pagination, retrieve, create, update, and delete.
  • Added an example demonstrating template operations and made the new template types available through the package’s public interface.

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ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Organization UI
• Review profile: CHILL
• Plan: Advanced
• Run ID: 02081c19-dca4-4fdf-985b-a1b94623842b

📥 Commits

Reviewing files that changed from the base of the PR and between ece062e and c039510.

📒 Files selected for processing (10)

• README.md
• examples/paginated_templates/templates.py
• mailtrap/__init__.py
• mailtrap/api/paginated_templates.py
• mailtrap/api/resources/paginated_templates.py
• mailtrap/client.py
• mailtrap/models/paginated_templates.py
• tests/unit/api/paginated_templates/__init__.py
• tests/unit/api/paginated_templates/test_paginated_templates.py
• tests/unit/models/test_paginated_templates.py

💤 Files with no reviewable changes (1)

• mailtrap/models/paginated_templates.py

🚧 Files skipped from review as they are similar to previous changes (1)

• README.md

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📝 Walkthrough

Walkthrough

The change adds an experimental, account-scoped Templates API with models for template data and parameters. It exposes list, retrieve, create, update, and delete operations through MailtrapClient, adds unit tests, and provides a runnable example linked from the README.

Changes

Account-scoped templates API

Layer / File(s)	Summary
Template models and endpoint operations mailtrap/models/paginated_templates.py, mailtrap/api/resources/paginated_templates.py, mailtrap/__init__.py, tests/unit/models/test_paginated_templates.py, tests/unit/api/paginated_templates/*	Models define template data, response envelopes, pagination parameters, and create/update parameters. The API implements list, retrieve, create, update, and delete operations. Tests cover parameter serialization, responses, and API errors.
Client access and configuration mailtrap/api/paginated_templates.py, mailtrap/client.py, tests/unit/test_client.py	MailtrapClient.templates_api requires an account ID and creates a TemplatesBaseApi with the configured headers and general-host HTTP client. The test checks the missing-account-ID error.
Runnable example and README entry examples/paginated_templates/templates.py, README.md	The example demonstrates listing and managing templates. The README links to the experimental example.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant ExampleScript
  participant MailtrapClient
  participant TemplatesBaseApi
  participant PaginatedTemplatesApi
  participant MailtrapAPI
  ExampleScript->>MailtrapClient: Access templates_api
  MailtrapClient->>TemplatesBaseApi: Create with account ID and HTTP client
  ExampleScript->>TemplatesBaseApi: Access templates
  TemplatesBaseApi->>PaginatedTemplatesApi: Create account-scoped API
  PaginatedTemplatesApi->>MailtrapAPI: Send template operation request

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Merge Risk: 🟡 Moderate · up to c0395

The new Templates API is not merge-ready because its listing and CRUD requests use incorrect documented paths.

Security Architecture Review

Security architecture risk: 🔵 Low · up to c0395

The new API preserves the existing credential, host, and account-selection pattern without replacing legacy callers. No introduced security defect was established, but authorization and write-recovery guarantees for the experimental endpoint remain unverified.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The exposed operations can read, modify, and delete template content in the account selected by the request path. Effective account reach is determined by server authorization of the supplied token; the configured account ID is not proof that the token is restricted to one account. No broader credential source is introduced by the accessor.

Trust Boundaries and Controls

• observed — Caller-provided identifiers and content cross the SDK-to-service boundary through the existing HTTPS transport and Bearer credentials. The new accessor uses GENERAL_HOST rather than deriving the destination from template attributes or pagination metadata. Enforcement of account ownership remains outside the inspected SDK.

Resilience and Maintainability Implications

• inferred — The transport has no explicit retry loop, and HTTP responses failing response.ok raise before deletion acknowledgement. A server mutation followed by response loss or model-parsing failure can still leave its outcome uncertain. Idempotency, concurrent-write protection, and recovery depend on unavailable server semantics; comparable limitations already exist in the legacy resource, so introduced or worsened exposure was not established.

Hardening Proposals

• proposed — Before treating the experimental surface as stable, establish its account-scoped endpoint contract, cross-account authorization behavior, and interrupted-write recovery semantics. Document retry safety rather than adding automatic write retries without an established idempotency guarantee.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 13.75% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 80 functions across 17 files. (1 skipped:…	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 summarizes the main change: adding templates_api for the paginated /api/templates endpoints.
Description check	✅ Passed	The description covers the motivation, changes, and manual test steps. It omits the optional Images and GIFs section, but the remaining sections are complete and relevant.

Full details: Docstring Coverage

Explanation

Docstring coverage is 13.75% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 80 functions across 17 files. (1 skipped: 1 unsupported.)

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Actionable comments posted: 2

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at @mailtrap/api/resources/account_templates.py:
- Line 57: Update AccountTemplatesApi’s _api_path() to use the documented
/api/templates base path instead of an account-scoped path, and update the
corresponding mocked URLs in the account templates tests to match.

Review comments at @mailtrap/api/templates.py:
- Line 19: Update the deprecation warning and docstring for EmailTemplatesApi to
identify MailtrapClient.templates_api.templates as the replacement, since that
property exposes the template methods.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: Organization UI
• Review profile: CHILL
• Plan: Advanced
• Run ID: 5f28c767-0da5-40a3-8078-9dd29686ee23

📥 Commits

Reviewing files that changed from the base of the PR and between 89f92b4 and ece062e.

📒 Files selected for processing (13)

• README.md
• examples/account_templates/templates.py
• mailtrap/__init__.py
• mailtrap/api/account_templates.py
• mailtrap/api/resources/account_templates.py
• mailtrap/api/templates.py
• mailtrap/client.py
• mailtrap/models/account_templates.py
• tests/unit/api/account_templates/__init__.py
• tests/unit/api/account_templates/test_account_templates.py
• tests/unit/api/email_templates/test_deprecation.py
• tests/unit/models/test_account_templates.py
• tests/unit/test_client.py

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