tinycoll/dist/esm/internal/match.js

A minimal reactive document store with Mongo-like querying, reactivity, TTL support, and optional persistence.

function getValue(obj, path) {
    return path.split('.').reduce((o, k) => o?.[k], obj);
}
function matchField(val, cond) {
    // { key: undefined } and { key: { $eq: undefined } } are intentional different things
    if (cond === undefined)
        return true;
    if (typeof cond !== 'object' || cond === null)
        return val === cond;
    return Object.entries(cond).every(([op, expected]) => {
        switch (op) {
            case '$eq':
                return val === expected;
            case '$ne':
                return val !== expected;
            case '$gt':
                return val > expected;
            case '$gte':
                return val >= expected;
            case '$lt':
                return val < expected;
            case '$lte':
                return val <= expected;
            case '$in':
                return Array.isArray(expected) && expected.includes(val);
            case '$nin':
                return Array.isArray(expected) && !expected.includes(val);
            case '$exists':
                return expected ? val !== undefined : val === undefined;
            case '$regex':
                return typeof val === 'string' && new RegExp(expected).test(val);
            case '$size':
                return Array.isArray(val) && val.length === expected;
            default:
                return false;
        }
    });
}
export function matches(doc, query) {
    return Object.entries(query).every(([key, cond]) => {
        switch (key) {
            case '$or':
                return Array.isArray(cond) && cond.some((q) => matches(doc, q));
            case '$and':
                return Array.isArray(cond) && cond.every((q) => matches(doc, q));
            case '$not':
                return !matches(doc, cond);
            default: {
                const val = getValue(doc, key);
                return matchField(val, cond);
            }
        }
    });
}