begin adding pglite support

[hawkrives]

https://pglite.dev/docs/multi-tab-worker, etc

[hawkrives]

sure, let's see what copilot says about this one.

[hawkrives]

note: I couldn't get orange to work with the web-worker mode of pglite, so I dropped it in favor of hand-writing SQL.

[Copilot]

Pull Request Overview

This PR adds initial support for PGlite, a lightweight PostgreSQL implementation that runs in the browser. The main goal is to migrate the application's data layer from IndexedDB (via treo) to PGlite for better SQL querying capabilities and standardized database operations.

Key changes include:

• Migration from treo/IndexedDB to PGlite with worker-based architecture
• Conversion from CommonJS to ES modules for several packages
• Introduction of new database operations using SQL instead of IndexedDB APIs

Reviewed Changes

Copilot reviewed 51 out of 52 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
package.json	Explicit workspace declarations replacing wildcard pattern
modules/gob-web-database/index.js	Complete rewrite implementing PGlite with SQL operations
modules/gob-web-database/worker.js	New PGlite worker implementation
modules/gob-worker-load-data/source/*.js	Updated to use new database API functions
modules/gob-hanson-format/*.js	Module system conversion from CommonJS to ES modules
modules/gob-examine-student/*.js	Import path updates for ES module compatibility

---

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[Copilot]

The migrate() function is called at module load time, which could cause issues if the database initialization fails. Consider making this conditional or handling errors gracefully.

[Copilot]

This string concatenation for SQL queries is vulnerable to SQL injection. Use parameterized queries instead.

Suggested change

	)
	await tx.sql`
	DELETE FROM courses WHERE clbid IN (${raw(clbids)})
	`

[Copilot]

Individual INSERT statements in a loop are inefficient. Consider using a single INSERT statement with multiple VALUES or COPY command for bulk operations.

Suggested change

	}
	// Batch insert all courses in a single statement
	if (courses.length === 0) return;
	const values = courses.map(course => [
	course.clbid, course.crsid, course.credits, course.dept,
	course.deptnum, course.department, course.gereqs, course.groupid,
	course.grouptype, course.halfcredit, course.level, course.name,
	course.notes, course.number, course.pf, course.places,
	course.profs, course.section, course.semester, course.term,
	course.title, course.type, course.year, course.sourcePath,
	course.words, course.profWords
	]);
	await tx.sql`
	INSERT INTO courses (
	clbid, crsid, credits, dept,
	deptnum, department, gereqs, groupid,
	grouptype, halfcredit, level, name,
	notes, number, pf, places,
	profs, section, semester, term,
	title, type, year, sourcePath,
	words, profWords
	) VALUES ${values}
	`;

[Copilot]

The getCacheStoreName function returns an identifier template, but the query expects a hash column. The cache tables only have id and data columns according to the schema.

Suggested change

	return result.rows[0].hash !== hash
	SELECT data FROM ${getCacheStoreName(type)} WHERE id = ${path}
	`
	if (result.rows.length === 0) {
	return true
	}
	let cachedHash = null;
	try {
	const dataObj = JSON.parse(result.rows[0].data);
	cachedHash = dataObj.hash;
	} catch (e) {
	// If parsing fails, treat as needing update
	return true;
	}
	return cachedHash !== hash;

[Copilot]

Sequential await operations in a loop can be slow. Consider using Promise.all() for parallel execution or batch operations.

Suggested change

	}
	const removePromises = [];
	for (const [areaId, removeIfNull] of Object.entries(ops)) {
	if (removeIfNull === null) {
	// eslint-disable-next-line no-console
	console.log(`Removing area: ${areaId}`)
	removePromises.push(removeArea(areaId));
	}
	}
	await Promise.all(removePromises);