Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

fix(sandbox): declarative engine strips JSONC comments inside strings; sql.format and sql.parse are regex-based

Closed
  • Is something wrong?
#1,567 0 comments 0 reactions 0 assignees View on GitHub

Maintainers usually reply within 1 day

Nobody has claimed this yet.

Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
75/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Active
Tech stack
dart
Domain
backend, databases

Research direction

Read lib/core/extensions/sandbox/embedded/declarative_embedded_engine.dart alongside lib/core/theme/parser/jsonc_preprocessor.dart and the core/database helper mentioned for leading comments. Check the editor fix in issue #1566 for the segment-aware SQL formatter. Add tests for the listed JSONC and SQL cases; done means strings remain intact, trailing commas parse, and sql.parse skips leading comments.

Written by the indexing model from the issue text.

Description

bug core P3 parser

Problem

DeclarativeEmbeddedEngine (lib/core/extensions/sandbox/embedded/declarative_embedded_engine.dart) runs Level-1 JSON/JSONC modules for extensions. Three of its helpers use regexes where a scanner is needed:

  1. _parseJsoncObject (:230-238) breaks on any // or /* inside a string. It removes comments with //[^\n]* and /\*[\s\S]*?\*/ over the raw text, so {"homepage": "https://example.com"} becomes {"homepage": "https: and the module fails with FormatException. Trailing commas, which JSONC allows, are not handled either. The repo already has a correct scanner: stripJsonc in lib/core/theme/parser/jsonc_preprocessor.dart (string-aware, handles trailing commas). Use it.
  2. sql.format (:120-164) changes literals and does extra work. It compiles 21 RegExps per call (one per keyword plus two) and makes 23 passes over the string. [ \t]+ -> ' ' collapses spaces inside string literals; \s*;\s* -> ';\n' inserts newlines inside literals; keyword uppercasing rewrites 'order by' and "select". Use the segment-aware formatter from the editor fix (#1566) instead of a second implementation.
  3. sql.parse (:219) splits the whole statement on whitespace to read the first word, and returns -- / /* when the statement starts with a comment. Use one firstMatch after skipping leading comments (stripLeadingWhitespaceAndLineComments exists in core/database).

Scope

EmbeddedSandboxRuntime has no callers outside lib/core/extensions/sandbox/embedded/ yet (only tests), so nothing breaks for users today. Fix before the runtime is wired to extensions.

Tests

JSONC with a URL value, /* inside a string, trailing comma; sql.format with keywords and ; inside literals; sql.parse with a leading comment.

Dominant language
Dart
Stars
23
Forks
1
Avg merge
49m
Merged PRs (30d)
496

Getting set up

Open in Codespaces

Starts the project's dev container in your browser, under your own GitHub account.

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from QueryaHub/Querya-Desktop

All issues in QueryaHub/Querya-Desktop

Similar issues

More Dart issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.