nodedb-json/dist/esm/collection/collection.js

A lightweight JSON-based database for Node.js with TypeScript support, indexing, and complex query capabilities

import { matchesConditions } from '../query/matcher.js';
export class Collection {
    constructor(db, key) {
        this.db = db;
        this.key = key;
    }
    all() {
        const data = this.db.get(this.key);
        return Array.isArray(data) ? data : [];
    }
    insert(item) {
        this.db.push(this.key, item);
        return this;
    }
    findOne(where) {
        if (typeof where === 'function') {
            return this.db.find(this.key, where);
        }
        return this.db.find(this.key, item => this._matches(item, where));
    }
    findMany(where) {
        if (!where) {
            return this.all();
        }
        if (typeof where === 'function') {
            return this.db.filter(this.key, where);
        }
        return this.db.filter(this.key, item => this._matches(item, where));
    }
    updateOne(where, updater) {
        const predicate = this._toPredicate(where);
        this.db.update(this.key, predicate, updater);
        return this;
    }
    deleteOne(where) {
        const predicate = this._toPredicate(where);
        let deleted = false;
        this.db.delete(this.key, item => {
            if (deleted || !predicate(item)) {
                return false;
            }
            deleted = true;
            return true;
        });
        return this;
    }
    query(options = {}) {
        return this.db.query(this.key, options);
    }
    createIndex(indexDefinition) {
        this.db.createIndex(this.key, indexDefinition);
        return this;
    }
    _toPredicate(where) {
        return typeof where === 'function'
            ? where
            : (item) => this._matches(item, where);
    }
    _matches(item, where) {
        return matchesConditions(item, where);
    }
}
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