i18n support for sicp

[yihao03]

Description

updated router to read language params from url and request for the corresponding page in the backend added button in sicp page to switch between languages

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update
• [ ] Code quality improvements

How to test

use the updated backend that supports i18n when starting the frontend navigate to the sicp page in the frontend and switch between languages

Checklist

• [ ] I have tested this code
• [ ] I have updated the documentation

Summary by CodeRabbit

• New Features

  • Added bilingual support (English and Chinese) for the SICP textbook, including a language toggle button.
  • Language preference is now saved and restored using local storage.
  • URLs can now include a language prefix to directly access content in a specific language.

• Enhancements

  • Table of contents and content are dynamically loaded based on the selected language, with improved error handling and loading indicators.
  • Added route support for language-prefixed URLs under the SICP path.

[RichDom2185]

Please take whatever Copilot says with a big mountain of salt, I will review it properly later…

[coderabbitai[bot]]

[!NOTE]

Other AI code review bot(s) detected

CodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review.

Walkthrough

The changes introduce bilingual support (English and Chinese) for the SICP textbook interface. Language preference is now managed via local storage, URL parameters, and a UI toggle. The table of contents and content fetching logic are updated to dynamically load language-specific resources. Routing is enhanced to recognize language-prefixed URLs.

Changes

Cohort / File(s)	Change Summary
SICP Language Preference Utilities src/features/sicp/utils/SicpUtils.ts	Adds constants and functions for managing SICP language preference in local storage, including setting, reading, and dispatching a language change event.
SICP Main Page Language Support src/pages/sicp/Sicp.tsx	Integrates language selection state, initialization from local storage or URL, language toggle UI, content fetching by language, and updates effects and navigation to support bilingual content.
SICP Table of Contents Refactor & i18n src/pages/sicp/subcomponents/SicpToc.tsx	Refactors TOC rendering into a child component, adds language-aware dynamic TOC fetching with loading and error handling, and listens for language change events.
Routing for Language Parameter src/routes/routerConfig.tsx	Adds a new route pattern to support URLs with a language parameter before the section, enabling navigation to language-specific SICP content.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant SicpPage
    participant LocalStorage
    participant Router
    participant TOCComponent
    participant Backend

    User->>SicpPage: Visit /sicpjs or /sicpjs/:param_lang/:section?
    SicpPage->>LocalStorage: Read language preference
    SicpPage->>Router: Parse URL for :param_lang
    alt Language in URL
        SicpPage->>LocalStorage: Set language from URL
        SicpPage->>Router: Navigate to URL without :param_lang
    end
    SicpPage->>TOCComponent: Render with selected language
    TOCComponent->>Backend: Fetch TOC JSON for language
    alt Fetch fails
        TOCComponent->>TOCComponent: Load static fallback TOC
    end
    User->>SicpPage: Click language toggle button
    SicpPage->>LocalStorage: Update language
    SicpPage->>TOCComponent: Trigger re-render with new language

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~40 minutes

Poem

In fields of code where languages grow,
A toggle appears—now SICP’s bilingual, you know!
English and Chinese, side by side,
With local storage where settings reside.
URLs now speak in many a tongue—
Rabbits rejoice, their work is well done!
🐇✨

[!NOTE]

🔌 MCP (Model Context Protocol) integration is now available in Early Access!

Pro users can now connect to remote MCP servers under the Integrations page to get reviews and chat conversations that understand additional development context.

✨ Finishing Touches

• [ ] 📝 Generate Docstrings

🧪 Generate unit tests

• [ ] Create PR with unit tests
• [ ] Post copyable unit tests in a comment

---

🪧 Tips

Chat

There are 3 ways to chat with CodeRabbit:

‼️ IMPORTANT Auto-reply has been disabled for this repository in the CodeRabbit settings. The CodeRabbit bot will not respond to your replies unless it is explicitly tagged.

• Files and specific lines of code (under the "Files changed" tab): Tag @coderabbitai in a new review comment at the desired location with your query. Examples:
  • @coderabbitai explain this code block.
• PR comments: Tag @coderabbitai in a new PR comment to ask questions about the PR branch. For the best results, please provide a very specific query, as very limited context is provided in this mode. Examples:
  • @coderabbitai gather interesting stats about this repository and render them as a table. Additionally, render a pie chart showing the language distribution in the codebase.
  • @coderabbitai read src/utils.ts and explain its main purpose.
  • @coderabbitai read the files in the src/scheduler package and generate a class diagram using mermaid and a README in the markdown format.

Support

Need help? Create a ticket on our support page for assistance with any issues or questions.

CodeRabbit Commands (Invoked using PR comments)

• @coderabbitai pause to pause the reviews on a PR.
• @coderabbitai resume to resume the paused reviews.
• @coderabbitai review to trigger an incremental review. This is useful when automatic reviews are disabled for the repository.
• @coderabbitai full review to do a full review from scratch and review all the files again.
• @coderabbitai summary to regenerate the summary of the PR.
• @coderabbitai generate docstrings to generate docstrings for this PR.
• @coderabbitai generate sequence diagram to generate a sequence diagram of the changes in this PR.
• @coderabbitai generate unit tests to generate unit tests for this PR.
• @coderabbitai resolve resolve all the CodeRabbit review comments.
• @coderabbitai configuration to show the current CodeRabbit configuration for the repository.
• @coderabbitai help to get help.

Other keywords and placeholders

• Add @coderabbitai ignore anywhere in the PR description to prevent this PR from being reviewed.
• Add @coderabbitai summary to generate the high-level summary at a specific location in the PR description.
• Add @coderabbitai anywhere in the PR title to generate the title automatically.

CodeRabbit Configuration File (.coderabbit.yaml)

• You can programmatically configure CodeRabbit by adding a .coderabbit.yaml file to the root of your repository.
• Please see the configuration documentation for more information.
• If your editor has YAML language server enabled, you can add the path at the top of this file to enable auto-completion and validation: # yaml-language-server: $schema=https://coderabbit.ai/integrations/schema.v2.json

Documentation and Community

• Visit our Documentation for detailed information on how to use CodeRabbit.
• Join our Discord Community to get help, request features, and share feedback.
• Follow us on X/Twitter for updates and announcements.

[RichDom2185]

@coderabbitai full review

[coderabbitai[bot]]

✅ Actions performed

Full review triggered.

[coveralls]

Pull Request Test Coverage Report for Build 16858394883

Details

• 62 of 115 (53.91%) changed or added relevant lines in 4 files are covered.
• 6 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.003%) to 43.288%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/features/sicp/utils/SicpUtils.ts	7	10	70.0%
src/pages/sicp/subcomponents/SicpToc.tsx	30	53	56.6%
src/pages/sicp/Sicp.tsx	24	51	47.06%
<!--	Total:	62	115

Files with Coverage Reduction	New Missed Lines	%
src/pages/sicp/subcomponents/SicpToc.tsx	6	51.16%
<!--	Total:	6

Totals
Change from base Build 16858234296:	0.003%
Covered Lines:	20574
Relevant Lines:	49714

---

💛 - Coveralls

[RichDom2185]

@sayomaki this should be ok now but can you review my code? Though it's still blocked by the SICP PR https://github.com/source-academy/sicp/pull/1082