properly deal with empty objects

[MichaelDoyle]

Fixes #15

[gemini-code-assist]

Hello @MichaelDoyle, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

Summary of Changes

Hello team, gemini-code-assist here to provide a summary of this pull request. This PR, authored by MichaelDoyle, aims to properly handle the rendering of empty objects ({}) and empty arrays ([]) within the ngx-json-treeview component. It addresses issue #15 by adding logic to detect these empty structures and updating the component's template to display them concisely using their respective braces, rather than attempting to render them as expandable nodes. The changes include adding a helper method in the component's TypeScript file and modifying the HTML template to utilize this new logic for conditional rendering. A test case for an empty array has also been added to the demo application.

Highlights

• Empty Object/Array Handling: Introduces logic to correctly identify and render empty objects ({}) and empty arrays ([]) in the treeview.
• Component Logic: Adds an isEmpty method to the NgxJsonTreeviewComponent to determine if a segment represents an empty object or array.
• Template Rendering: Updates the component's HTML template to conditionally render empty objects/arrays using their simple brace representation ({} or []) instead of expandable nodes.
• Demo Application: Adds a test case for rendering an empty array in the demo application to verify the fix.

Changelog

• projects/demo/src/app/app.component.html
  • Renamed the 'Primatives' section heading to 'Simple Types' (line 37).
  • Added a test case for rendering an empty array ([]) in the 'Simple Types' section (line 44).
• projects/ngx-json-treeview/src/lib/ngx-json-treeview.component.html
  • Modified the class applied to the root section when rendering simple types, applying 'punctuation' for empty objects/arrays (lines 3-7).
  • Introduced a template variable @let empty to store the result of the new isEmpty check for each segment (line 24).
  • Added a new conditional block (@if (empty)) to specifically render empty objects/arrays using just their braces (lines 41-45).
• projects/ngx-json-treeview/src/lib/ngx-json-treeview.component.ts
  • Added a new method isEmpty(segment: Segment) that checks if a segment's value is an empty object or an empty array (lines 154-158).

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---

Empty braces gleam,
No keys, no items inside,
Just silence there.

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[gemini-code-assist]

Code Review

This pull request effectively addresses the handling of empty objects and arrays in the ngx-json-treeview component, as intended by issue #15. The introduction of the isEmpty method and the corresponding template logic for rendering empty structures like {} and [] is a good improvement. The addition of an empty array test case in the demo application is also a welcome change.

The main area for attention is an inconsistency related to a CSS class name (punctuation vs. puctuation) that could lead to styling issues for the newly handled empty root elements. Addressing this will ensure the visual presentation is as expected.

Overall, the core logic for handling empty objects/arrays is well-implemented.

Summary of Findings

• CSS Class Name Inconsistency and Typo: The PR introduces the correctly spelled CSS class 'punctuation' for root empty objects/arrays in one part of the template. However, the project's SCSS and other parts of the HTML template use a misspelled version, .puctuation. This will lead to missing styles for the root empty elements. This inconsistency needs to be resolved, preferably by correcting the typo globally (in SCSS and all HTML instances).
• Consistent Handling of Empty Structures: The core logic for identifying and rendering empty objects and arrays (e.g., {}, []) is well-implemented with the new isEmpty method and corresponding template updates. This directly addresses the goal of the PR.

Merge Readiness

The pull request makes good progress in handling empty JSON objects and arrays. However, there's a high-severity issue regarding CSS class name consistency (punctuation vs. puctuation) that will likely lead to incorrect styling for some elements. I recommend addressing this issue before merging. Once the CSS class inconsistency is resolved, the PR should be in good shape. As a reviewer, I am not authorized to approve the pull request; please ensure further review and approval from authorized maintainers.

[MichaelDoyle]

/gemini review

[gemini-code-assist]

Code Review

This pull request effectively addresses the handling of empty objects and arrays within the JSON tree view, which is a valuable improvement. The introduction of the isEmpty method and the corresponding template logic for nested empty collections are clear and well-implemented. The correction of the "puctuation" typo to "punctuation" throughout the codebase, especially in the SCSS, is also a good cleanup.

I have one suggestion regarding the display consistency for root-level empty collections compared to nested ones. Please see the detailed comment below. Overall, good work on this enhancement!

Summary of Findings

• Display Inconsistency for Root Empty Collections: Root-level empty objects/arrays are currently displayed using a multi-line stringified format (e.g., {\n}), while nested empty collections are displayed compactly (e.g., "{}"). Aligning the display of root-level empty collections to also be compact would improve consistency.
• Typo Corrections: The PR includes several typo corrections from "puctuation" to "punctuation". This is a good cleanup, particularly the SCSS class name fix which ensures styles are correctly applied. (Not commented inline as per severity settings, but noted as a positive change).

Merge Readiness

The pull request makes good progress in handling empty objects and arrays. I recommend considering the feedback regarding the display consistency of root-level empty collections. Addressing this would further enhance the feature's polish. I am unable to approve pull requests myself, so please ensure further review and approval from other team members before merging. Based on my review, I would suggest addressing the medium severity comment before merging.