import { defQuery } from "@thi.ng/oquery";

// object to query
const DB = {
    alice: {
        age: 33,
        knows: ["bob", "charlie", "dori"],
        type: "person",
    },
    bob: {
        age: 32,
        knows: ["alice"],
        type: "person",
        spouse: "alice",
    },
    charlie: {
        parent: "alice",
        knows: ["alice", "bob", "dori"],
    },
};

// init w/ default opts
// (uses @thi.ng/equiv for equality checks)
const query = defQuery();

// find all subjects with `type = "person"` relationship
query(DB, null, "type", "person");
// { alice: { type: 'person' }, bob: { type: 'person' } }

// find all who know bob or charlie
query(DB, null, "knows", ["bob", "charlie"])
// { alice: { knows: [ 'bob', 'charlie' ] }, charlie: { knows: [ 'bob' ] } }

// everyone w/ given min age
query(DB, null, "age", (age) => age >= 33)
// { alice: { age: 33 } }

// select only subjects with A/B initials
query(DB, (id) => id > "a" && id < "c", null, null)
// {
//   alice: { age: 33, knows: [ 'bob', 'charlie', 'dori' ], type: 'person' },
//   bob: { age: 32, knows: [ 'alice' ], type: 'person', spouse: 'alice' }
// }