@ansvar/singapore-law-mcp
Version:
Complete Singapore law database — 523 Acts, 28K+ provisions from Singapore Statutes Online (sso.agc.gov.sg) with full-text search, definitions, and citation support
47 lines • 1.42 kB
JavaScript
/**
* FTS5 query helpers for Singapore Law MCP.
*
* Handles query sanitization and variant generation for SQLite FTS5.
*/
/**
* Sanitize user input for safe FTS5 queries.
* Removes characters that have special meaning in FTS5 syntax.
*/
export function sanitizeFtsInput(input) {
return input
.replace(/['"(){}[\]^~*:]/g, ' ')
.replace(/\s+/g, ' ')
.trim();
}
/**
* Build FTS5 query variants for a search term.
* Returns variants in order of specificity (most specific first):
* 1. Exact phrase match
* 2. All terms required (AND)
* 3. Prefix match on last term
*/
export function buildFtsQueryVariants(sanitized) {
if (!sanitized || sanitized.trim().length === 0) {
return [];
}
const terms = sanitized.split(/\s+/).filter(t => t.length > 0);
if (terms.length === 0)
return [];
const variants = [];
// Exact phrase
if (terms.length > 1) {
variants.push(`"${terms.join(' ')}"`);
}
// AND query
variants.push(terms.join(' AND '));
// Prefix match on last term (for autocomplete-like behavior)
if (terms.length === 1 && terms[0].length >= 3) {
variants.push(`${terms[0]}*`);
}
else if (terms.length > 1) {
const prefix = [...terms.slice(0, -1), `${terms[terms.length - 1]}*`];
variants.push(prefix.join(' AND '));
}
return variants;
}
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