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refactor: Simplify node insertion logic in beforeInsert() method of NestedSetsBehavior class. #18

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Merged
merged 2 commits into from
Jun 29, 2025

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@terabytesoftw terabytesoftw commented Jun 29, 2025

Q A
Is bugfix? ✔️
New feature?
Breaks BC?

Summary by CodeRabbit

  • Bug Fixes
    • Improved handling of insert operations to prevent errors when the target node does not exist.

@terabytesoftw terabytesoftw added the bug Something isn't working label Jun 29, 2025
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coderabbitai bot commented Jun 29, 2025

Walkthrough

The beforeInsert() method in NestedSetsBehavior.php was refactored to use a match(true) construct with explicit null checks on $this->node, ensuring insertion logic only executes when a valid node is present. The method's internal logic was updated to prevent potential null dereference issues.

Changes

File(s) Change Summary
src/NestedSetsBehavior.php Refactored beforeInsert() to use match(true) with explicit null checks on $this->node.

Sequence Diagram(s)

sequenceDiagram
    participant Caller
    participant NestedSetsBehavior
    participant Node

    Caller->>NestedSetsBehavior: beforeInsert()
    alt $this->operation is valid and $this->node exists
        NestedSetsBehavior->>Node: getAttribute('left' or 'right')
        NestedSetsBehavior-->>Caller: proceed with insertion logic
    else $this->operation unsupported
        NestedSetsBehavior-->>Caller: throw NotSupportedException
    end
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Poem

In the code where the nested sets grow,
A rabbit checked nodes before letting them show.
With a match and a hop, it avoids null's trap,
Ensuring each branch gets a gentle clap.
No dereference errors, just orderly flow! 🐇🌳

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🔧 phpcs (3.7.2)
src/NestedSetsBehavior.php

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  • src/NestedSetsBehavior.php (1 hunks)
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📓 Common learnings
Learnt from: terabytesoftw
PR: yii2-extensions/nested-sets-behavior#13
File: src/NestedSetsBehavior.php:145-145
Timestamp: 2025-06-29T11:22:41.839Z
Learning: The user terabytesoftw prefers to keep PRs focused and small, implementing enhancements in separate dedicated PRs rather than bundling multiple changes together.
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  • GitHub Check: phpunit-compatibility / PHP 8.2-windows-latest
  • GitHub Check: phpunit-compatibility / PHP 8.3-windows-latest
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  • GitHub Check: phpunit / PHP 8.1-windows-latest
🔇 Additional comments (1)
src/NestedSetsBehavior.php (1)

366-387: Excellent defensive programming improvement!

The refactoring to use match(true) with explicit null checks significantly improves the robustness of the insertion logic. By adding && $this->node !== null conditions, you've effectively prevented potential null pointer dereferences while maintaining clean, readable code.

Key benefits of this change:

  • Null safety: Ensures $this->node is valid before calling methods on it
  • Consistency: Aligns with the pattern used in afterUpdate() method (lines 250-262)
  • Maintainability: Makes null requirements explicit and self-documenting
  • Correctness: The OPERATION_MAKE_ROOT case appropriately omits the null check since it doesn't require a node reference

This is a solid bugfix that enhances code reliability without changing external behavior.

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codecov bot commented Jun 29, 2025

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (eeaeec5) to head (528c6bf).
Report is 2 commits behind head on main.

Additional details and impacted files
@@             Coverage Diff             @@
##                main       #18   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
- Complexity        85        89    +4     
===========================================
  Files              2         2           
  Lines            458       468   +10     
===========================================
+ Hits             458       468   +10     

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@terabytesoftw terabytesoftw requested a review from Copilot June 29, 2025 15:08
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Pull Request Overview

This PR refactors the node insertion logic in the NestedSetsBehavior class to simplify condition handling and improve error handling when the target node is absent.

  • Replaces separate variable assignments with inline attribute retrieval in a match(true) structure.
  • Adds explicit null checks for node-based operations to ensure proper error handling.
Comments suppressed due to low confidence (1)

src/NestedSetsBehavior.php:379

  • [nitpick] Add a brief comment explaining why the MAKE_ROOT branch does not perform a null check on $this->node, ensuring clarity about the intended behavior for root node insertions.
            $this->operation === self::OPERATION_MAKE_ROOT => $this->beforeInsertRootNode(),

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