Add solution for Challenge 30 by nzamulov

[nzamulov]

Challenge 30 Solution

Submitted by: @nzamulov
Challenge: Challenge 30

Description

This PR contains my solution for Challenge 30.

Changes

• Added solution file to challenge-30/submissions/nzamulov/solution-template.go

Testing

• Solution passes all test cases
• Code follows Go best practices

Thank you for reviewing my submission! 🚀

[coderabbitai]

Walkthrough

Adds a new ContextManager abstraction and a concrete simpleContextManager implementation in a single Go file, providing methods for creating cancellable/timeout contexts, attaching/retrieving values, executing cancellation-aware tasks, waiting for completion, helper functions (SimulateWork, ProcessItems), and a main usage example.

Changes

Cohort / File(s)	Change Summary
Context manager implementation challenge-30/submissions/nzamulov/solution-template.go	Adds ContextManager interface, simpleContextManager implementation, NewContextManager() constructor, context creation methods (CreateCancellableContext, CreateTimeoutContext), value helpers (AddValue, GetValue), execution/wait helpers (ExecuteWithContext, WaitForCompletion), demonstration helpers (SimulateWork, ProcessItems), and a main illustrating usage.

Sequence Diagram

sequenceDiagram
    participant Main
    participant Manager as ContextManager
    participant Worker as Task
    participant Ctx as context.Context

    Main->>Manager: NewContextManager()
    Manager-->>Main: manager

    Main->>Manager: CreateTimeoutContext(parent, timeout)
    Manager->>Ctx: context.WithTimeout(parent, timeout)
    Ctx-->>Manager: ctx, cancel
    Manager-->>Main: ctx, cancel

    Main->>Manager: ExecuteWithContext(ctx, task)
    Manager->>Worker: task() (observes ctx)
    alt task finishes before cancel
        Worker-->>Manager: nil
        Manager-->>Main: nil
    else canceled or deadline exceeded
        Worker-->>Manager: context error
        Manager-->>Main: error
    end

    Main->>Manager: WaitForCompletion(ctx, duration)
    Manager-->>Main: nil / timeout error

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Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• Add solution for Challenge 27 #55 — Adds the same ContextManager interface, simpleContextManager implementation, NewContextManager, and helper functions (SimulateWork, ProcessItems), indicating a direct code-level match.

Pre-merge checks

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title Check	✅ Passed	The title "Add solution for Challenge 30 by nzamulov" directly and clearly summarizes the main change in the pull request. The raw summary confirms that a new Go solution file was added to the challenge-30 submissions directory, and the title accurately reflects this primary change. The title is concise, specific enough to understand the core contribution, and avoids vague terminology.
Description Check	✅ Passed	The pull request description is clearly related to the changeset, properly identifying it as a solution submission for Challenge 30 and specifying the file added at challenge-30/submissions/nzamulov/solution-template.go. The description provides context about testing and code quality claims, which are relevant to understanding the submission. The description is well-structured and meaningfully conveys information about the change rather than being vague or off-topic.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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📜 Recent review details

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Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 465dcb0 and 9eb2e68.

📒 Files selected for processing (1)

• challenge-30/submissions/nzamulov/solution-template.go (1 hunks)

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

• challenge-30/submissions/nzamulov/solution-template.go

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Actionable comments posted: 5

🧹 Nitpick comments (1)

challenge-30/submissions/nzamulov/solution-template.go (1)

10-29: The ContextManager interface wraps stdlib functions without adding value.

Most methods (CreateCancellableContext, CreateTimeoutContext, AddValue) are thin wrappers around context package functions. This abstraction layer doesn't provide additional functionality and violates YAGNI principles. In production code, prefer using the context package directly.

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 1bda5b0 and 465dcb0.

📒 Files selected for processing (1)

• challenge-30/submissions/nzamulov/solution-template.go (1 hunks)